阅读说明：本技术 吸塑贴膜一体机及吸塑贴膜方法 (Plastic uptake and film pasting all-in-one machine and plastic uptake and film pasting method ) 是由 许光阳 刘志华 周根来 苏斌 李彦民 于 2021-07-15 设计创作，主要内容包括：本发明的一个技术方案是提供了一种吸塑贴膜一体机,其特征在于,包括吸塑贴膜机构、位于吸塑贴膜机构左右两侧的支架平台一及支架平台二、上加热单元及下加热单元；上加热单元的上表面为加热面,下表面为非加热面；下加热单元的上表面为非加热面,下表面为加热面；将上加热单元经由导轨二推入吸塑贴膜机构后,由上加热单元加热位于其上方的亚克力片材,以完成吸塑工艺；将下加热单元经由导轨三推入吸塑贴膜机构后,由下加热单元加热位于其下方的半成品,以完成贴膜工艺。本发明的另一个技术方案是提供了一种吸塑贴膜方法。本发明利用了一台机器设备实现了吸塑成型及贴膜。(The invention provides a plastic uptake and film sticking integrated machine which is characterized by comprising a plastic uptake and film sticking mechanism, a first bracket platform, a second bracket platform, an upper heating unit and a lower heating unit, wherein the first bracket platform and the second bracket platform are positioned at the left side and the right side of the plastic uptake and film sticking mechanism; the upper surface of the upper heating unit is a heating surface, and the lower surface of the upper heating unit is a non-heating surface; the upper surface of the lower heating unit is a non-heating surface, and the lower surface of the lower heating unit is a heating surface; after the upper heating unit is pushed into the plastic suction film sticking mechanism through the second guide rail, the acrylic sheet positioned above the upper heating unit is heated by the upper heating unit so as to complete the plastic suction process; and after the lower heating unit is pushed into the plastic suction film pasting mechanism through the third guide rail, the semi-finished product positioned below the lower heating unit is heated by the lower heating unit so as to finish the film pasting process. The other technical scheme of the invention is to provide a plastic uptake film pasting method. The invention realizes plastic suction molding and film pasting by using one machine.)

1. A plastic uptake and film sticking integrated machine is characterized by comprising a plastic uptake and film sticking mechanism, a first bracket platform and a second bracket platform which are positioned on the left side and the right side of the plastic uptake and film sticking mechanism, an upper heating unit and a lower heating unit;

the upper surface of the upper heating unit is a heating surface, and the lower surface of the upper heating unit is a non-heating surface; the upper surface of the lower heating unit is a non-heating surface, and the lower surface of the lower heating unit is a heating surface;

the upper surface of the first support platform is provided with a second guide rail, and the upper surface of the second support platform is provided with a third guide rail; the upper heating unit and the lower heating unit are respectively supported on the second guide rail and the third guide rail through respective supporting legs, the upper heating unit can move left and right along the second guide rail, and the lower heating unit can move left and right along the third guide rail; after the upper heating unit is pushed into the plastic suction film sticking mechanism through the second guide rail, the heating surface of the upper heating unit faces upwards, and the acrylic sheet positioned above the upper heating unit is heated by the upper heating unit to complete the plastic suction process; after the lower heating unit is pushed into the plastic suction film pasting mechanism through the third guide rail, the heating surface of the lower heating unit faces downwards, and a semi-finished product positioned below the lower heating unit is heated by the lower heating unit to finish a film pasting process;

the plastic suction film sticking mechanism comprises a main body frame, the top of the main body frame is provided with a temperature sensor, and the temperature sensor is connected with a control unit; a lifting platform and a clamp are arranged in the main body frame; the fixture is used for clamping the peripheral edge of the acrylic sheet and is positioned above the lifting platform; the lifting platform can be driven by the driving mechanism to ascend and descend along the guide mechanism; the middle part of the lifting platform is provided with a bulge which is adaptive to the shape of a product to be molded; n vent holes are uniformly distributed on the lifting platform along the periphery of the bulge, N is more than or equal to 3, and the vent holes are communicated with the vacuum generating mechanism; the lifting platform is provided with a first guide rail which can be in butt joint with a second guide rail and a third guide rail; the upper heating unit moved into the plastic suction mechanism moves to the position below the acrylic sheet clamped by the clamp through the first guide rail, and the lower heating unit moved into the plastic suction mechanism moves to the position above the semi-finished product clamped on the protrusion through the first guide rail.

2. The plastic uptake and film sticking all-in-one machine as claimed in claim 1, wherein the upper heating unit and the lower heating unit are respectively provided with an oven in which a plurality of mutually parallel heating pipes are arranged, the heating pipes are controlled by the control unit, the bottom surface and the top surface of the oven adopted by the upper heating unit are closed, the bottom surface and the top surface of the oven adopted by the lower heating unit are open, and the heating pipes radiate heat outwards through the open top surface or the open bottom surface of the oven, so that an acrylic sheet above the oven is heated or a film on a semi-finished product above the oven is heated.

3. The plastic uptake and film sticking all-in-one machine as claimed in claim 1, wherein the lifting platform comprises a first density plate structural member, a second density plate structural member and a steel frame which are sequentially stacked from top to bottom;

the steel frame is connected with the driving mechanism;

the second guide rail is arranged on the top surface of the second density board structural part;

the first density plate structure part comprises a bottom step and an upper step which are stacked, and the edges of the bottom step and the upper step form a two-layer step structure; the middle part of the upper step is provided with the bulge, when plastic uptake operation is carried out, the acrylic sheet is molded through the bulge, and when film pasting operation is carried out, the bulge is used for fixing the semi-finished product; a circle of downward-sunken grooves are formed in the top surface of the upper step along the bottom of the protrusions, N vent holes are fixedly formed in the grooves, N is larger than or equal to 3, and the N vent holes are uniformly distributed along the circumferential direction; a circle of plastic sealing strip is arranged at the edge of the top surface of the upper step;

the bottom step is fixed on the second density board structural member.

4. The integrated plastic uptake and film sticking machine as claimed in claim 1, wherein two fixing support rods are fixed on the main body frame, and the clamp is fixed between the two fixing support rods.

5. The plastic uptake and film sticking integrated machine as claimed in claim 4, wherein the clamp comprises a # -shaped structural member surrounded by four aluminum profiles, two adjacent aluminum profiles are connected and fixed through a triangular fastener, the triangular fastener is clamped into a clamping groove of the corresponding aluminum profile, and the triangular fastener is fixedly connected with the aluminum profiles through nuts; the # -shaped structural part is fixedly connected with the fixed supporting rod;

the four sides of the # -shaped structural member are respectively and uniformly distributed with a plurality of quick clamps, the clamping end of each quick clamp is provided with a metal pressing sheet, and a plastic sealing gasket is arranged below each metal pressing sheet; each quick clamp clamps the edge of the acrylic sheet through a metal clamping piece and a plastic sealing gasket; the whole acrylic sheet is fixed and clamped by the quick clamps distributed on the periphery of the acrylic sheet.

6. The integrated machine of claim 1, wherein the height of the protrusion is H₁The height of the downward-turned arc or R corner of the semi-finished product is H₂Then, thenHas H₁>H₂(ii) a Let the radius of the film applied on the surface of the semi-finished product after the manual film-pasting process be R₁The radius of the upper step is R₂Then there is R₁>R, wherein R ═ R₂+H₁。

7. A plastic uptake and film sticking method adopts the plastic uptake and film sticking all-in-one machine of claim 1, and is characterized by comprising the following steps:

the first step is as follows: selecting an acrylic sheet with a set specification and size to be fixed on a fixture;

the second step is that: selecting a bulge with a proper shape, and installing the bulge to a lifting platform;

the third step: pushing the upper heating oven into the plastic suction film pasting mechanism to enable the distance between the upper heating oven and the acrylic sheet to be D1;

the fourth step: after the air pressure of an air storage tank in the vacuum generating mechanism is adjusted to a set value one, an air extractor in the vacuum generating mechanism is opened;

the fifth step: starting a heating pipe of the upper heating oven, and heating the acrylic sheet above the heating pipe;

and a sixth step: after the set heating temperature is reached, the upper heating oven is moved out of the plastic suction film sticking mechanism;

the seventh step: driving the lifting platform to ascend, and enabling the protrusions to continuously jack up after contacting the acrylic sheets; in the jacking process, vacuum forming is carried out on the acrylic sheet by using the vent holes; in the vacuum forming process, the edge of the acrylic sheet is tightly attached to the plastic sealing strip on the upper surface of the lifting platform, so that the plastic sealing strip is matched with the acrylic sheet to form a relatively closed space, and the vacuum degree in the vacuum forming process is ensured;

the ninth step: stopping vacuum forming after the vacuum forming time is reached, and naturally cooling for a certain time;

the tenth step: after the lifting platform descends, taking down the formed primary product from the clamp;

the eleventh step: manually cutting off redundant acrylic material at the edge of the primary product to obtain a product to be pasted with a film, wherein the periphery of the product to be pasted with the film is provided with a lower partThe radius of the product to be filmed is set as R at the turning arc or R corner₃Preparation radius of R₁The film of (a);

the twelfth step: positioning the flat part of the surface of the product to be filmed and manually applying the prepared film in the eleventh step to obtain a semi-finished product, wherein after the manual application is finished, the distance that the edge of the film extends out of the edge of the product to be filmed is L, and L is R₁-R₃；

The thirteenth step: the semi-finished product is clamped at the top of the bulge by utilizing the downward-turned arc or the R angle part of the semi-finished product, and a certain distance is reserved between the bottom surface of the downward-turned arc or the R angle part of the semi-finished product and the upper surface of the upper step in the lifting platform;

the fourteenth step is that: pushing the lower heating oven into the plastic suction film pasting mechanism until the lower heating oven is positioned right above the semi-finished product; then adjusting the height of the lifting platform to enable the distance between the lower heating oven and the semi-finished product to be D2;

the fifteenth step: after the air pressure of an air storage tank in the vacuum generating mechanism is adjusted to a second set value, an air extractor in the vacuum generating mechanism is started; meanwhile, a heating pipe of the lower heating oven is started to heat the surface of the semi-finished product;

sixteenth, step: when the temperature reaches the heating temperature, the lower heating oven is moved out of the plastic suction film sticking mechanism;

seventeenth step: vacuum suction and pasting are carried out on the film on the surface of the semi-finished product by utilizing the vent holes, so that the originally straight film is bent and then is tightly pasted on the surface of a downward-turned arc or R-angle part of the semi-finished product, the side surface of the bulge and the upper surface of the upper step of the lifting platform; in the process, the edge of the bent film is tightly attached to the plastic sealing strip on the upper surface of the lifting platform, so that the plastic sealing strip is matched with the film to form a relatively closed space, and the vacuum degree in the vacuum suction and attachment process is ensured;

and eighteenth step: stopping vacuum suction and sticking after reaching the vacuum suction and sticking time so as to naturally cool the film;

the nineteenth step: and taking down the product which is subjected to film pasting from the bulge, manually removing redundant films, and sealing the edges to obtain a finished product subjected to film pasting.

8. The method as claimed in claim 7, wherein in the third step, the distance D1 between the upper heating oven and the acrylic sheet is 300 mm;

in the fourth step, the first set value is 8 mpa;

in the fifth step, when the thickness of the acrylic sheet is 4mm, the heating temperature is set between 65 ℃ and 75 ℃, and when the thickness of the acrylic sheet is 3mm, the heating temperature is set between 50 ℃ and 60 ℃;

in the seventh step, the vacuum forming time is 3min-4 min;

in the ninth step, the natural cooling time is 2min-3 min;

in the tenth step, the height H of the bump is set₁Height H of lower hem of semifinished product₂The distance between the bottom surface of the lower folded edge of the semi-finished product and the upper surface of the upper step is 10 mm;

in the fourteenth step, the distance D2 between the lower heating oven and the semi-finished product is 300-350 mm;

in the fifteenth step, the second set value is 6 mpa; the heating temperature is between 45 ℃ and 55 ℃;

seventeenth step, the vacuum suction pasting time is 1.5min-2 min;

in the eighteenth step, the natural cooling time of the film is 2min-3 min.

Technical Field

The invention relates to a machine device for combining a plastic sucking machine and a film sticking machine into a whole, which can be used for sticking a film on the surface of a formed product after an acrylic sheet is formed by the machine device. The invention also relates to a method for carrying out plastic suction and film pasting by utilizing the machine equipment. The invention can be used in the industries of advertisement, decoration and the like.

Background

The existing acrylic product molding process generally comprises the following steps: heating the acrylic sheet to soften, and extruding and stretching the softened acrylic sheet by using an upper die and a lower die to form the acrylic sheet. The extrusion and stretching forming process is widely applied in various industries. However, for an acrylic product with high surface quality requirement, if the above extrusion stretch forming process is adopted, an extruded mark is easily left on the surface of the acrylic product in the extrusion stretch forming process. For acrylic products such as a light-emitting lamp box, a light-emitting logo and the like, when light is emitted, the impression left on the surface of the product due to the extrusion and stretching forming process becomes particularly obvious.

In order to overcome the defects of the extrusion and stretch forming process, a plastic sucking machine is generally used for heating and softening a flat acrylic sheet, then a vacuum technology is used for adsorbing the softened acrylic sheet on the surface of a mold, and the acrylic sheet is formed after being cooled. The process well solves the defect that the surface of a product is marked due to the extrusion and stretching forming process. However, the existing plastic sucking machine has a complex structure and a single function. After an acrylic product is formed, a film is usually required to be pasted on the surface, and the existing plastic uptake machine cannot finish the film pasting work. The film can only be manually applied to the surface of the acrylic product. And the acrylic product formed by the plastic uptake machine often has an arc or an R-angle part, when the artificial film pasting is carried out on the parts, the film can not be pasted with the surface of the arc or the R-angle part, film pasting bubbles can be generated, and the final finished product quality is influenced.

Disclosure of Invention

The purpose of the invention is: the utility model provides a can realize the mechanical equipment of plastic uptake and pad pasting simultaneously, utilize this mechanical equipment can make the film accomplish the laminating with the surface of the circular arc of ya keli product or R angle position.

In order to achieve the aim, the invention provides a plastic uptake and film sticking integrated machine which is characterized by comprising a plastic uptake and film sticking mechanism, a first bracket platform, a second bracket platform, an upper heating unit and a lower heating unit, wherein the first bracket platform and the second bracket platform are positioned on the left side and the right side of the plastic uptake and film sticking mechanism;

the upper surface of the upper heating unit is a heating surface, and the lower surface of the upper heating unit is a non-heating surface; the upper surface of the lower heating unit is a non-heating surface, and the lower surface of the lower heating unit is a heating surface;

the upper surface of the first support platform is provided with a second guide rail, and the upper surface of the second support platform is provided with a third guide rail; the upper heating unit and the lower heating unit are respectively supported on the second guide rail and the third guide rail through respective supporting legs, the upper heating unit can move left and right along the second guide rail, and the lower heating unit can move left and right along the third guide rail; after the upper heating unit is pushed into the plastic suction film sticking mechanism through the second guide rail, the heating surface of the upper heating unit faces upwards, and the acrylic sheet positioned above the upper heating unit is heated by the upper heating unit to complete the plastic suction process; after the lower heating unit is pushed into the plastic suction film pasting mechanism through the third guide rail, the heating surface of the lower heating unit faces downwards, and a semi-finished product positioned below the lower heating unit is heated by the lower heating unit to finish a film pasting process;

the plastic suction film sticking mechanism comprises a main body frame, the top of the main body frame is provided with a temperature sensor, and the temperature sensor is connected with a control unit; a lifting platform and a clamp are arranged in the main body frame; the fixture is used for clamping the peripheral edge of the acrylic sheet and is positioned above the lifting platform; the lifting platform can be driven by the driving mechanism to ascend and descend along the guide mechanism; the middle part of the lifting platform is provided with a bulge which is adaptive to the shape of a product to be molded; n vent holes are uniformly distributed on the lifting platform along the periphery of the bulge, N is more than or equal to 3, and the vent holes are communicated with the vacuum generating mechanism; the lifting platform is provided with a first guide rail which can be in butt joint with a second guide rail and a third guide rail; the upper heating unit moved into the plastic suction mechanism moves to the position below the acrylic sheet clamped by the clamp through the first guide rail, and the lower heating unit moved into the plastic suction mechanism moves to the position above the semi-finished product clamped on the protrusion through the first guide rail.

Preferably, the upper heating unit and the lower heating unit both adopt an oven internally provided with a plurality of mutually parallel heating pipes, the heating pipes are controlled by the control unit, the bottom surface and the top surface of the oven adopted by the upper heating unit are closed and opened, the bottom surface and the top surface of the oven adopted by the lower heating unit are opened and closed, and the heating pipes radiate heat outwards through the opened top surface or the opened bottom surface of the oven, so that an acrylic sheet positioned above the oven is heated or a film positioned on a semi-finished product above the oven is heated.

Preferably, the lifting platform comprises a first density plate structural member, a second density plate structural member and a steel frame which are sequentially stacked from top to bottom;

the steel frame is connected with the driving mechanism;

the second guide rail is arranged on the top surface of the second density board structural part;

the first density plate structure part comprises a bottom step and an upper step which are stacked, and the edges of the bottom step and the upper step form a two-layer step structure; the middle part of the upper step is provided with the bulge, when plastic uptake operation is carried out, the acrylic sheet is molded through the bulge, and when film pasting operation is carried out, the bulge is used for fixing the semi-finished product; a circle of downward-sunken grooves are formed in the top surface of the upper step along the bottom of the protrusions, N vent holes are fixedly formed in the grooves, N is larger than or equal to 3, and the N vent holes are uniformly distributed along the circumferential direction; a circle of plastic sealing strip is arranged at the edge of the top surface of the upper step;

the bottom step is fixed on the second density board structural member.

Preferably, two fixed support rods are fixed on the main body frame, and the clamp is fixed between the two fixed support rods.

Preferably, the clamp comprises a # -shaped structural member surrounded by four aluminum profiles, two adjacent aluminum profiles are connected and fixed through a triangular fastener, the triangular fastener is clamped into a clamping groove of the corresponding aluminum profile, and the triangular fastener is fixedly connected with the aluminum profiles through nuts; the # -shaped structural part is fixedly connected with the fixed supporting rod;

the four sides of the # -shaped structural member are respectively and uniformly distributed with a plurality of quick clamps, the clamping end of each quick clamp is provided with a metal pressing sheet, and a plastic sealing gasket is arranged below each metal pressing sheet; each quick clamp clamps the edge of the acrylic sheet through a metal clamping piece and a plastic sealing gasket; the whole acrylic sheet is fixed and clamped by the quick clamps distributed on the periphery of the acrylic sheet.

Preferably, the height of the protrusion is H₁The height of the downward-turned arc or R corner of the semi-finished product is H₂Then there is H₁>H₂(ii) a Let the radius of the film applied on the surface of the semi-finished product after the manual film-pasting process be R₁The radius of the upper step is R₂Then there is R₁>R, wherein R ═ R₂+H₁。

The invention also provides a plastic uptake and film sticking method, which adopts the plastic uptake and film sticking all-in-one machine and is characterized by comprising the following steps:

the first step is as follows: selecting an acrylic sheet with a set specification and size to be fixed on a fixture;

the second step is that: selecting a bulge with a proper shape, and installing the bulge to a lifting platform;

the third step: pushing the upper heating oven into the plastic suction film pasting mechanism to enable the distance between the upper heating oven and the acrylic sheet to be D1;

the fourth step: after the air pressure of an air storage tank in the vacuum generating mechanism is adjusted to a set value one, an air extractor in the vacuum generating mechanism is opened;

the fifth step: starting a heating pipe of the upper heating oven, and heating the acrylic sheet above the heating pipe;

and a sixth step: after the set heating temperature is reached, the upper heating oven is moved out of the plastic suction film sticking mechanism;

the seventh step: driving the lifting platform to ascend, and enabling the protrusions to continuously jack up after contacting the acrylic sheets; in the jacking process, vacuum forming is carried out on the acrylic sheet by using the vent holes; in the vacuum forming process, the edge of the acrylic sheet is tightly attached to the plastic sealing strip on the upper surface of the lifting platform, so that the plastic sealing strip is matched with the acrylic sheet to form a relatively closed space, and the vacuum degree in the vacuum forming process is ensured;

the ninth step: stopping vacuum forming after the vacuum forming time is reached, and naturally cooling for a certain time;

the tenth step: after the lifting platform descends, taking down the formed primary product from the clamp;

the eleventh step: manually cutting off redundant acrylic material at the edge of the primary product to obtain a product to be pasted with a film, wherein the periphery of the product to be pasted with the film is provided with a downward-turning arc or an R-angle part, and the radius of the product to be pasted with the film is set as R₃Preparation radius of R₁The film of (a);

the twelfth step: positioning the flat part of the surface of the product to be filmed and manually applying the prepared film in the eleventh step to obtain a semi-finished product, wherein after the manual application is finished, the distance that the edge of the film extends out of the edge of the product to be filmed is L, and L is R₁-R₃；

The thirteenth step: the semi-finished product is clamped at the top of the bulge by utilizing the downward-turned arc or the R angle part of the semi-finished product, and a certain distance is reserved between the bottom surface of the downward-turned arc or the R angle part of the semi-finished product and the upper surface of the upper step in the lifting platform;

the fourteenth step is that: pushing the lower heating oven into the plastic suction film pasting mechanism until the lower heating oven is positioned right above the semi-finished product; then adjusting the height of the lifting platform to enable the distance between the lower heating oven and the semi-finished product to be D2;

the fifteenth step: after the air pressure of an air storage tank in the vacuum generating mechanism is adjusted to a second set value, an air extractor in the vacuum generating mechanism is started; meanwhile, a heating pipe of the lower heating oven is started to heat the surface of the semi-finished product;

sixteenth, step: when the temperature reaches the heating temperature, the lower heating oven is moved out of the plastic suction film sticking mechanism;

seventeenth step: vacuum suction and pasting are carried out on the film on the surface of the semi-finished product by utilizing the vent holes, so that the originally straight film is bent and then is tightly pasted on the surface of a downward-turned arc or R-angle part of the semi-finished product, the side surface of the bulge and the upper surface of the upper step of the lifting platform; in the process, the edge of the bent film is tightly attached to the plastic sealing strip on the upper surface of the lifting platform, so that the plastic sealing strip is matched with the film to form a relatively closed space, and the vacuum degree in the vacuum suction and attachment process is ensured;

and eighteenth step: stopping vacuum suction and sticking after reaching the vacuum suction and sticking time so as to naturally cool the film;

the nineteenth step: and taking down the product which is subjected to film pasting from the bulge, manually removing redundant films, and sealing the edges to obtain a finished product subjected to film pasting.

Preferably, in the third step, the distance D1 between the upper heating oven and the acrylic sheet is 250-300 mm;

in the fourth step, the first set value is 8 mpa;

in the fifth step, when the thickness of the acrylic sheet is 4mm, the heating temperature is set between 65 ℃ and 75 ℃, and when the thickness of the acrylic sheet is 3mm, the heating temperature is set between 50 ℃ and 60 ℃;

in the seventh step, the vacuum forming time is 3min-4 min;

in the ninth step, the natural cooling time is 2min-3 min;

in the tenth step, the height H of the bump is set₁Height H of lower hem of semifinished product₂The distance between the bottom surface of the lower folded edge of the semi-finished product and the upper surface of the upper step is 10 mm;

in the fourteenth step, the distance D2 between the lower heating oven and the semi-finished product is 300-350 mm;

in the fifteenth step, the second set value is 6 mpa; the heating temperature is between 45 ℃ and 55 ℃;

seventeenth step, the vacuum suction pasting time is 1.5min-2 min;

in the eighteenth step, the natural cooling time of the film is 2min-3 min.

The invention realizes plastic suction molding and film pasting by using one machine, and compared with the prior art, the invention has the following advantages:

for the plastic uptake process, the invention adopts the principle that the acrylic sheet is heated to be softened, then is adsorbed on the surface of a mould in vacuum, and is shaped after being cooled, thereby effectively solving the defect of surface impression after the acrylic sheet is shaped. The clamp is composed of a section bar clamping groove and a fastener, the size can be freely adjusted according to the size of a product, and the clamp is convenient and fast. The supporting legs matched with the product on the periphery of the die are provided with a circle of high-temperature-resistant sealing strips, the high-temperature-resistant sealing strips are flat in surface, non-stick, good in weather resistance and ageing-resistant, and are carved by laser, so that the degree of mechanization is higher. The invention adopts a temperature control system to realize balanced temperature control. According to the invention, the formed plastic sheet is fixed on the clamp, the oven is pushed to directly heat, the oven is moved after heating is finished, the platform is lifted to perform suction stretching forming, the operation is rapid and convenient, and the product quality is stable. The machine equipment provided by the invention is simple to manufacture, convenient and flexible to operate, strong in practicability and low in cost, meets the requirements of products with different specifications and sizes, enhances the market competitiveness and generates remarkable economic benefits.

For the film pasting process, the film is firstly positioned and manually pasted on the flat part, the film is reserved at the arc or R corner part on the periphery, the film is softened by heating and is absorbed on the surface of a product in vacuum, the moisture and air remained between the film and the product are effectively solved, and the film is pasted by combining the manual operation and the machine, so that the product quality is more stable. Effectively solves the problem of film sticking bubbles, improves the product quality, reduces the rejection rate and has obvious economic benefit. And a temperature control system is adopted to control temperature evenly. The operation is quick and convenient, and the product quality is stable. The machine equipment provided by the invention is simple to manufacture, convenient and flexible to operate, strong in practicability and low in cost, meets the requirements of products with different specifications and sizes, enhances the market competitiveness and generates remarkable economic benefits.

Drawings

FIG. 1 is an axial view of a plastic uptake and film sticking integrated machine provided by the invention;

FIG. 2 is a front view of the plastic sucking and film sticking integrated machine provided by the invention;

FIG. 3 is a cross-sectional view taken along line A1-A1 of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A2-A2 of FIG. 2;

FIG. 5 is a schematic view of a tooling fixture;

FIG. 6 is a cross-sectional view taken along plane D-D of FIG. 5;

fig. 7 is a partially enlarged view of fig. 6.

Detailed Description

The invention is further illustrated by the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

As shown in fig. 1, the plastic-absorbing and film-sticking integrated machine provided by the invention comprises a plastic-absorbing and film-sticking mechanism a, a first bracket platform D1, a second bracket platform D2, an upper heating unit and a lower heating unit, wherein the first bracket platform D1 and the second bracket platform D2 are positioned at the left side and the right side of the plastic-absorbing and film-sticking mechanism a.

The upper surface of the upper heating unit is a heating surface, and the lower surface of the upper heating unit is a non-heating surface. The upper surface of the lower heating unit is a non-heating surface, and the lower surface is a heating surface. The upper surface of the first bracket platform D1 is provided with a second guide rail 402, and the upper surface of the second bracket platform D2 is provided with a third guide rail 403. The upper heating unit and the lower heating unit are respectively supported on the second guide rail 402 and the third guide rail 403 through supporting legs with similar structures. After the upper heating unit is pushed into the blister film sticking mechanism A through the second guide rail 402, the acrylic sheet F positioned above the upper heating unit is heated by the upper heating unit, so that the blister process is completed. After the lower heating unit is pushed into the blister film sticking mechanism A through the third guide rail 403, the semi-finished product F1 below the lower heating unit is heated by the lower heating unit, so that the film sticking process is completed.

In this embodiment, the upper heating unit is an upper heating oven B, and includes a frame surrounded by a circle of edge-covering plates 8. The top surface of the frame is open and the bottom surface is closed. A plurality of heating pipes 9 which are parallel to each other are fixed in the frame, and all the heating pipes 9 are arranged along the left and right directions. The control unit K controls the heating pipe 9 to emit heat according to the set temperature, and the heat emitted by the heating pipe 9 is emitted outwards from the open top surface of the frame.

The lower heating unit is a lower heating oven C, the structure of the lower heating oven C is similar to that of the upper heating oven B, and the difference is that: the frame of the lower heating oven C is closed at the top and closed at the bottom, so that the heat emitted from the heating pipe 9 is radiated outward from the open bottom of the frame.

The support legs include legs installed at the bottom of the upper heating oven B or the lower heating oven C, which are supported on the second guide rail 402 or the third guide rail 403, while pulleys 11 are installed at the bottom of each leg 10. Pulley 11 cooperates with rail two 402 or rail three 403 such that the oven can be moved left and right along rail two 402 or rail three 403. And a first pulley stop block 601 is arranged at the tail end of the second guide rail 402, and the upper heating oven B is prevented from sliding out of the second guide rail 402 through the first pulley stop block 601. A second pulley stop block 602 is mounted at the end of the third guide rail 403, and the second pulley stop block 602 prevents the lower heating oven C from sliding out of the third guide rail 403.

Two second guide rails 402 are installed on the top surface of the first bracket platform D1, and the two second guide rails 402 are arranged symmetrically in front and back. In this embodiment, the second guide rail 402 is fixed by a fixing member 5, and the fixing member 5 may be a screw or other parts known to those skilled in the art. In this embodiment, a first adjusting foot 1201 is further installed at the bottom of the first support platform D1, and the upper heating oven B is leveled by the first adjusting foot 1201. When plastic suction operation is carried out, the upper heating oven B is pushed into the plastic suction film sticking mechanism A along the second guide rail 402, the acrylic sheet F is upwards heated by the upper heating oven B, and the acrylic sheet F is fixed in the plastic suction film sticking mechanism A.

Similarly, two guide rails three 403 are installed on the top surface of the bracket platform two D2, and the two guide rails three 403 are arranged symmetrically in front and back. In this embodiment, the third guide rail 403 is fixed by a fixing member 5, and the fixing member 5 may be a screw or other parts known to those skilled in the art. In this embodiment, the bottom of the second bracket platform D2 is further provided with a second adjusting pin 1202, and the lower heating oven C is leveled by the second adjusting pin 1202. When the film sticking operation is carried out, the lower heating oven C is pushed into the plastic suction film sticking mechanism A along the guide rail III 403, the lower heating oven C downwards heats the semi-finished product F1, and the semi-finished product F1 is fixed in the plastic suction film sticking mechanism A.

The plastic suction film sticking mechanism A comprises a main body frame, and in the embodiment, the main body frame is formed by welding steel brackets. A temperature sensor 7 is installed at the top of the main body frame, and the temperature sensor 7 is connected with a control unit K. The main body frame is internally provided with a clamp J, a lifting platform T and a bottom plate 31. The lifting platform T is located above the bottom plate 31, and the clamp J is located above the lifting platform T. After the upper heating oven B or the lower heating oven C is pushed into the plastic suction film sticking mechanism A, the upper heating oven B or the lower heating oven C is positioned between the clamp J and the lifting platform T.

The fixture J is used for clamping the acrylic sheet F to be processed. In this embodiment, referring to fig. 4 and 5, the clamp J is fixed between the two fixing support rods 3. Two ends of each fixed support rod 3 are fixedly connected with the upright posts 1 of the main body frame at the same side through a first angle connector 2901 and a screw 3001.

The clamp J comprises a # -shaped structural component, and the # -shaped structural component is connected and fixed with the fixing support rod 3 on the same side through the second angle connector 2902 and the screw 3002. In this embodiment, this groined type structure is enclosed by four aluminium alloy 23, connects fixedly through triangle fastener 24 between two adjacent aluminium alloy 23, goes into triangle fastener 24 card during the connection and corresponds in the draw-in groove of aluminium alloy 23, later with nut 25 with triangle fastener 24 and aluminium alloy 23 fixed connection.

Referring to fig. 6, a plurality of quick clamps 28 are uniformly distributed on four sides of the # -shaped structural member, a metal pressing sheet 27 is arranged at a clamping end of each quick clamp 28, and a plastic sealing gasket 26 is arranged below each metal pressing sheet 27. The quick clamp 28 clamps the edge of the acrylic sheet F through the metal clamping piece 27 and the plastic sealing gasket 26. The acrylic sheet F is fixed and clamped by the quick clamps 28 distributed around the acrylic sheet F.

Four corners of the top surface of the bottom plate 31 are respectively fixed with four upright posts 2, and the lifting platform T positioned above the bottom plate 31 can be driven by the driving mechanism to ascend and descend along the upright posts 2. In this embodiment, the driving mechanism is a cylinder 22 fixed to the bottom plate 31, and the operation of the cylinder 22 is controlled by a control unit K fixed to the main body frame. Referring to fig. 2, in the present embodiment, four cylinders 22 are fixed to four corners of the bottom plate 31, respectively, and the control unit K controls the four cylinders 22 to operate in synchronization. The telescopic end of the cylinder 22 is fixedly connected to the bottom of the lifting platform T, so that the lifting platform T is driven by the cylinder 22 to ascend and descend along the upright 2.

Referring to fig. 3, in the embodiment, the lifting platform T includes a first density plate structural member 18, a second density plate structural member 17, and a steel frame 20, which are sequentially stacked from top to bottom, and four columns 2 respectively penetrate through four corners of the steel frame 20 and the second density plate structural member 17.

In this embodiment, a channel 21 is installed at the bottom of the steel frame 20, and a connector for fixedly connecting the telescopic end of the cylinder 22 is installed by using the channel 21.

In this embodiment, the second density board structural member 17 is formed by laminating two density boards. Two first guide rails 401 are fixed on the top surface of the second density board structural member 17, and the first guide rails 401 are also fixed through fixing members similarly to the second guide rails 402 and the third guide rails 403. Two ends of the two first guide rails 401 are respectively butted with the two second guide rails 402 and the two third guide rails 403. The upper oven B pushed in via the second rail 402 and the lower oven C pushed in via the third rail 403 both move along the first rail 401 to above the first density board structure 18. Lower heating oven C is closer to density board structure one 18 than upper heating oven B, which is closer to fixture J than lower heating oven C.

The first density board structural member 18 is formed by laminating a plurality of density boards, and two layers of steps, namely a bottom step 14 and an upper step 13, are formed at the edge of the first density board structural member 18 through laser engraving. The middle of the upper step 13 has a protrusion M, the shape of which is adapted to the shape of the product to be formed. The bulge M has two functions simultaneously; when plastic suction operation is carried out, the acrylic sheet F is molded through the protrusions M; when the film attaching work is performed, the half-finished product F1 is fixed by the projection M. A circle of downward-sunken groove is formed in the top surface of the upper step 13 along the bottom of the protrusion M, N vent holes 16 are fixedly formed in the groove, N is larger than or equal to 3, and the N vent holes 16 are uniformly distributed along the circumferential direction. The vent hole 16 is communicated with an external air storage tank E through an air pipe E2, and the air storage tank E is connected with an air extractor E1, in the embodiment, the air extractor EAnd 1 is a vacuum pump. The air pipe E2 is provided with a control switch controlled by a control unit K and a pressure regulating valve N, the control unit K controls the opening and closing of the air pipe E2 through the control switch, and the control unit K controls the air pressure sucked by the vent hole 16 through the pressure regulating valve N. In order to make the air vent 16 communicate with the air tube E2, in the present embodiment, an annular air groove is formed in the bottom step 14 and communicates with the N air vents 16, respectively, an air hole Q is formed in the second density plate structural member 17 and communicates with the annular air groove, the air hole Q communicates with the air tube E2, so that the air tube E2 communicates with the air vent 16 via the air hole Q and the annular air groove. The top edge of the upper step 13 is provided with a ring of plastic sealing strip 15. Let the radius of the film applied on the surface of the semi-finished product F1 after the manual film-pasting process is set as R₁The radius of the upper step 13 is R₂Then there is R₁>R, wherein R ═ R₂+H₁。

The bottom step 14 is fixedly connected with a second density board structural member 17 through a screw 19.

The plastic molding and film sticking of the acrylic product by adopting the plastic film sticking machine comprises the following steps:

the first step is as follows: selecting an acrylic sheet F with a set specification and size to be fixed on a fixture J;

the second step is that: selecting a bulge M with a proper shape, and installing the bulge M to a lifting platform T;

the third step: pushing the upper heating oven B into the plastic-absorbing film-sticking mechanism A, so that the distance between the upper heating oven B and the acrylic sheet F is 250-300 mm;

the fourth step: after the air pressure of the air storage tank E is adjusted to 8mpa by using a switch of the air storage tank E, the air extractor E2 is turned on;

the fifth step: starting a heating pipe 9 of the upper heating oven B, and heating the acrylic sheet F positioned above the heating pipe; when the thickness of the acrylic sheet F is 4mm, the heating temperature is set between 65 ℃ and 75 ℃, and when the thickness of the acrylic sheet F is 3mm, the heating temperature is set between 50 ℃ and 60 ℃;

and a sixth step: if the thickness of the acrylic sheet F is 4mm, the temperature sensor 7 is used for detecting that the temperature reaches 65-75 ℃, or if the thickness of the acrylic sheet F is 3mm, the temperature sensor 7 is used for detecting that the temperature reaches 50-60 ℃, and then the upper heating oven B is moved out of the plastic suction film pasting mechanism A;

the seventh step: driving the lifting platform T to ascend, and enabling the protrusion M to continuously push up after contacting the acrylic sheet F; in the jacking process, a control switch on an air pipe E2 is turned on, and the acrylic sheet F is subjected to vacuum forming by utilizing the vent hole 16 for 3-4 min; in the vacuum forming process, the edge of the acrylic sheet F is tightly attached to the plastic sealing strip 15, so that the plastic sealing strip 15 is matched with the acrylic sheet F to form a relatively closed space, and the vacuum degree in the vacuum forming process is ensured;

the ninth step: after 3min to 4min, closing a control switch on an air pipe E2, and naturally cooling for 2min to 3 min;

the tenth step: after the lifting platform T descends, taking down the formed primary product from the clamp J;

the eleventh step: manually cutting off redundant acrylic material at the edge of the primary product to obtain a product to be pasted with a film, wherein the periphery of the product to be pasted with the film is provided with a downward-turning arc or an R-angle part, and the radius of the product to be pasted with the film is set as R₃Preparation radius of R₁The film of (a);

the twelfth step: positioning the flat part of the surface of the product to be filmed and manually applying the prepared film obtained in the eleventh step to obtain a semi-finished product F1, wherein after the manual application is finished, the distance that the edge of the film extends out of the edge of the product to be filmed is L, and L is R₁-R₃；

The thirteenth step: the semi-finished product F1 is clamped on the top of the bulge M by using the downward-turned arc or the R-shaped corner part of the semi-finished product F1. In this embodiment, the height H of the protrusion M₁Height H of the lower hem of the semifinished product F1₂10mm, so that a distance of 10mm is reserved between the bottom surface of the downward-turned arc or R-angle part of the semi-finished product F1 and the upper surface of the upper step 13;

the fourteenth step is that: pushing the lower heating oven C into the plastic suction film sticking mechanism A until the lower heating oven C is positioned right above the semi-finished product F1; then, the height of the lifting platform T is adjusted by using the air cylinder 22, so that the distance between the lower heating oven C and the semi-finished product F1 is 300-350 mm;

the fifteenth step: after the air pressure of the air storage tank E is adjusted to 6mpa by using a switch of the air storage tank E, the air extractor E2 is turned on; meanwhile, a heating pipe 9 of the lower heating oven C is started to heat the surface of the semi-finished product F1, and the heating temperature is set to be 45-55 ℃;

sixteenth, step: when the temperature sensor 7 detects that the temperature reaches 45-55 ℃, the lower heating oven C is moved out of the plastic suction film sticking mechanism A;

seventeenth step: opening a control switch on an air pipe E2, and carrying out vacuum suction pasting on the film on the surface of the semi-finished product F1 by utilizing the vent hole 16 for 1.5-2 min, so that the originally straight film is bent and then tightly attached to the surface of the downward-turned arc or R corner position of the semi-finished product F1, the side surface of the bulge M and the upper surface of the upper step 13; in the process, the edge of the bent film is tightly attached to the plastic sealing strip 15, so that the plastic sealing strip 15 is matched with the film to form a relatively closed space so as to ensure the vacuum degree in the vacuum suction and attachment process;

and eighteenth step: closing a control switch on an air pipe E2 after 1.5-2 min, and naturally cooling the film for 2-3 min;

the nineteenth step: and taking down the product subjected to film pasting from the bulge M, manually removing redundant films, and sealing edges to obtain a finished product subjected to film pasting.