阅读说明：本技术 一种真空吸塑成型工艺 (Vacuum plastic-sucking molding process ) 是由 魏福亮 于 2021-08-23 设计创作，主要内容包括：本发明提供一种真空吸塑成型工艺。所述真空吸塑成型工艺包括以下步骤：S1、材料准备：选取原材料片材,将原材料片材外表面的污渍清洗干净,保证原材料片材纯度,清洗完毕后进行烘干；S2、加热软化：将清洗完毕后的原材料片材送入加热机构进行加热处理使其软化,首先最低温加热一端时间对原材料片材进行预热使其出现微软化。本发明提供的真空吸塑成型工艺,对原材料片材进行充分清洗,减少了成型后混入杂质,提高了成品的质量,并且通过在加热软化时先进行预热,使得产品更加具有可塑性,进一步提高了成品的质量,同时能够将产品产生的边角料进行回用,减少了成本的同时,也避免的资源的浪费,提高了环保效果。(The invention provides a vacuum plastic molding process. The vacuum plastic molding process comprises the following steps: s1, material preparation: selecting a raw material sheet, cleaning stains on the outer surface of the raw material sheet to ensure the purity of the raw material sheet, and drying after cleaning; s2, heating and softening: and feeding the cleaned raw material sheet into a heating mechanism for heating treatment to soften the raw material sheet, and preheating the raw material sheet at the lowest temperature for a period of time to slightly soften the raw material sheet. According to the vacuum plastic-sucking molding process provided by the invention, the raw material sheet is fully cleaned, impurities mixed after molding are reduced, the quality of a finished product is improved, the product has better plasticity by preheating during heating and softening, the quality of the finished product is further improved, meanwhile, leftover materials generated by the product can be recycled, the cost is reduced, the waste of resources is avoided, and the environment-friendly effect is improved.)

1. A vacuum plastic molding process is characterized by comprising the following steps:

s1, material preparation: selecting a raw material sheet, cleaning stains on the outer surface of the raw material sheet to ensure the purity of the raw material sheet, and drying after cleaning;

s2, heating and softening: feeding the cleaned raw material sheet into a heating mechanism for heating treatment to soften the sheet, firstly heating the raw material sheet at the lowest temperature for a period of time to slightly soften the sheet, and then gradually heating the sheet to the highest temperature to completely soften the sheet;

s3, plastic suction molding: feeding the raw material sheet softened in the step S2 into a required mold, closing the mold, opening a vacuum pump valve on the mold for vacuumizing, and controlling a vacuum valve through a photoelectric tube to adjust the vacuum degree until the raw material sheet reaches the required forming depth;

s4, cooling and forming: cooling the outer surface of the die in S3 by matching a water cooling mode and an air cooling mode until the inner raw material sheet is completely shaped;

s5, cutting the semi-finished product: demolding the raw material sheet subjected to cold cutting and shaping in the step S4, cutting the raw material sheet by using a die cutting machine, and cutting off the corner bulges and burrs to generate a finished product;

s6, waste recovery: collecting the corner bulges and burrs cut in the step S5, crushing the corner bulges and the burrs, mixing the crushed corner bulges and the burrs with the original material, and preparing a raw material sheet again;

s7, packaging and ex-warehouse: and packaging and delivering the products in the S5 according to the respective requirements of the customers.

2. The vacuum forming process of claim 1, wherein the cleaning in S1 comprises water washing and chemical cleaning, and the raw material sheet is first placed in a water tank for water washing, then the water-washed raw material sheet is placed in a chemical tank for chemical cleaning, and finally the raw material sheet is placed in the water tank for water washing.

3. The vacuum forming process according to claim 2, wherein in the step S1, the raw material sheet is protected in case of abnormality during chemical cleaning of the raw material sheet.

4. The vacuum forming process according to claim 1, wherein the thickness of the raw material sheet used in S1 is 0.1-15 mm.

5. The vacuum forming process of claim 1, wherein the minimum temperature of 120 ℃ in S2 is 7-15S, and the maximum temperature of 180 ℃ in S2 is 10-15S.

6. The vacuum forming process according to claim 1, wherein the cooling temperature in S4 is 10-25 ℃ and the cooling time is 20-30S.

7. The vacuum forming process of claim 1, wherein the S1-S7 are all adapted to convey the sheet of stock material in an automated feeding manner.

8. The vacuum forming process according to claim 1, wherein in the case where the raw material sheet is damaged when being cut, the damaged raw material sheet is recycled as scrap and is reformed into a raw material sheet through the step S6 in the step S5.

9. The vacuum plastic molding process of claim 1, wherein the mold in S3 comprises a bottom plate, four telescopic rods are fixedly connected to the top of the bottom plate, a top plate is fixedly connected between the top ends of the telescopic rods, a movable mold is installed at the bottom of the top plate, a mounting groove is fixedly connected to the top of the bottom plate, heat exchange fins are fixedly connected between two sides of the inner wall of the mounting groove, a fixed mold is arranged inside the mounting groove, a cooling coil is embedded inside the mounting groove, the inlet and the outlet of the cooling coil penetrate through the mounting groove and extend to the outside of the mounting groove, the cross section of the cooling coil is D-shaped, and the straight edge is in contact with the heat exchange fins.

10. The vacuum plastic molding process of claim 9, wherein a magnet block is fixedly connected to the bottom of the inner wall of the mounting groove, an iron block is fixedly connected to the bottom of the fixed mold, and the magnet block is connected with the iron block in an attracting manner.

Technical Field

The invention relates to the field of plastic suction forming processes, in particular to a vacuum plastic suction forming process.

Background

The plastic uptake is a plastic processing technology, and the main principle is that after a flat plastic hard sheet is heated and softened, the plastic hard sheet is absorbed on the surface of a mould in vacuum, cooled and formed, and the plastic hard sheet is applied to a technical process of various industries.

The vacuum plastic molding product has the advantages of low price, high production efficiency, free shape and color selection, corrosion resistance, light weight, electric insulation performance and the like, and is applied to the packaging of products such as stationery, toys, daily necessities, hardware power distribution, electronic products, food, cosmetics and the like, and the products such as billboards, automobiles, industrial accessories, building materials, safety helmets, washing machine and refrigerator liners, turnover boxes, agricultural products and the like.

In the related technology, most vacuum plastic molding processes in the market at present are single, the operation is very complicated, the manufactured finished products are easy to carry impurities, the quality cannot be guaranteed, leftover materials cannot be recycled, and the use cost is high.

Therefore, it is necessary to provide a vacuum forming process to solve the above technical problems.

Disclosure of Invention

The invention provides a vacuum plastic molding process, which solves the problem that most vacuum plastic molding processes in the market are single.

In order to solve the technical problem, the vacuum plastic molding process provided by the invention comprises the following steps:

s1, material preparation: selecting a raw material sheet, cleaning stains on the outer surface of the raw material sheet to ensure the purity of the raw material sheet, and drying after cleaning;

s2, heating and softening: feeding the cleaned raw material sheet into a heating mechanism for heating treatment to soften the sheet, firstly heating the raw material sheet at the lowest temperature for a period of time to slightly soften the sheet, and then gradually heating the sheet to the highest temperature to completely soften the sheet;

s3, plastic suction molding: feeding the raw material sheet softened in the step S2 into a required mold, closing the mold, opening a vacuum pump valve on the mold for vacuumizing, and controlling a vacuum valve through a photoelectric tube to adjust the vacuum degree until the raw material sheet reaches the required forming depth;

s4, cooling and forming: cooling the outer surface of the die in S3 by matching a water cooling mode and an air cooling mode until the inner raw material sheet is completely shaped;

s5, cutting the semi-finished product: demolding the raw material sheet subjected to cold cutting and shaping in the step S4, cutting the raw material sheet by using a die cutting machine, and cutting off the corner bulges and burrs to generate a finished product;

s6, waste recovery: collecting the corner bulges and burrs cut in the step S5, crushing the corner bulges and the burrs, mixing the crushed corner bulges and the burrs with the original material, and preparing a raw material sheet again;

s7, packaging and ex-warehouse: and packaging and delivering the products in the S5 according to the respective requirements of the customers.

Preferably, the cleaning in S1 includes water washing and chemical cleaning, in which the raw material sheet is first placed in a water tank for water washing, then the water-washed raw material sheet is placed in a chemical tank for chemical cleaning, and finally the raw material sheet is placed in the water tank for water washing.

Preferably, in S1, the raw material sheet is protected when an abnormality occurs during chemical cleaning of the raw material sheet.

Preferably, the thickness of the raw material sheet used in S1 is 0.1 to 15 mm.

Preferably, the lowest temperature in the S2 is 120 ℃, the heating time is 7-15S, and the highest temperature in the S2 is 180 ℃, the heating time is 10-15S.

Preferably, the cooling temperature in the S4 is 10-25 ℃, and the cooling time is 20-30S.

Preferably, the S1-S7 adopt an automatic feeding mode to convey the raw material sheet.

Preferably, in the case where the raw material sheet is damaged when being cut in S5, the damaged raw material sheet is recycled as waste, and is reformed into the raw material sheet through S6.

Preferably, the mould includes the bottom plate in S3, four telescopic links of top fixedly connected with of bottom plate, four fixedly connected with roof between the top of telescopic link, the movable mould is installed to the bottom of roof, the top fixedly connected with mounting groove of bottom plate, fixedly connected with heat exchanger fin between the both sides of mounting groove inner wall, the inside of mounting groove is provided with the cover half, the inside of mounting groove is inlayed and is had cooling coil, cooling coil 'S import and export all run through the mounting groove extends to the outside of mounting groove, cooling coil' S cross-section is the D type to straight flange and heat exchanger fin contact.

Preferably, the bottom fixedly connected with magnet piece of mounting groove inner wall, the bottom fixedly connected with iron plate of cover half, the magnet piece with the iron plate actuation is connected.

Compared with the related art, the vacuum plastic-sucking molding process provided by the invention has the following beneficial effects:

the invention provides a vacuum plastic-sucking molding process, which fully cleans raw material sheets, reduces impurities mixed after molding, improves the quality of finished products, enables the products to have plasticity by preheating during heating and softening, further improves the quality of the finished products, can recycle leftover materials generated by the products, reduces the cost, avoids the waste of resources and improves the environmental protection effect.

Drawings

FIG. 1 is a schematic flow chart of a vacuum forming process according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a vacuum forming process according to a second embodiment of the present invention;

fig. 3 is a sectional view of the mounting groove shown in fig. 2.

Reference numbers in the figures: 1. bottom plate, 2, telescopic link, 3, roof, 4, movable mould, 5, mounting groove, 6, heat exchanger fin, 7, cover half, 8, cooling coil, 9, magnet piece, 10, iron plate.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 1 is a schematic flow chart of a vacuum forming process according to a first embodiment of the present invention. The vacuum plastic molding process comprises the following steps:

s1, material preparation: selecting a raw material sheet, cleaning stains on the outer surface of the raw material sheet to ensure the purity of the raw material sheet, and drying after cleaning;

s2, heating and softening: feeding the cleaned raw material sheet into a heating mechanism for heating treatment to soften the sheet, firstly heating the raw material sheet at the lowest temperature for a period of time to slightly soften the sheet, and then gradually heating the sheet to the highest temperature to completely soften the sheet;

s3, plastic suction molding: feeding the raw material sheet softened in the step S2 into a required mold, closing the mold, opening a vacuum pump valve on the mold for vacuumizing, and controlling a vacuum valve through a photoelectric tube to adjust the vacuum degree until the raw material sheet reaches the required forming depth;

s4, cooling and forming: cooling the outer surface of the die in S3 by matching a water cooling mode and an air cooling mode until the inner raw material sheet is completely shaped;

s5, cutting the semi-finished product: demolding the raw material sheet subjected to cold cutting and shaping in the step S4, cutting the raw material sheet by using a die cutting machine, and cutting off the corner bulges and burrs to generate a finished product;

s6, waste recovery: collecting the corner bulges and burrs cut in the step S5, crushing the corner bulges and the burrs, mixing the crushed corner bulges and the burrs with the original material, and preparing a raw material sheet again;

s7, packaging and ex-warehouse: and packaging and delivering the products in the S5 according to the respective requirements of the customers.

The cleaning in the step S1 includes water cleaning and chemical cleaning, in which the raw material sheet is first placed in a water tank for water cleaning, then the raw material sheet after water cleaning is placed in a chemical tank for chemical cleaning, and finally the raw material sheet is placed in the water tank for water cleaning.

The raw material sheet material cleaning method has the advantages that the easily cleaned stain and dust on the surface of the raw material sheet material can be removed through water washing, then chemical dirt stained on the surface of the raw material sheet material is removed through a chemical solvent through chemical cleaning, so that the purity of the raw material sheet material is guaranteed, and finally the chemical solvent remained on the surface of the raw material sheet material is removed through water washing again.

In S1, when an abnormality occurs in the chemical cleaning of the sheet material, the sheet material is protected.

When the raw material sheet is subjected to chemical cleaning, the raw material sheet is taken out under the condition that the chemical solvent corrodes the raw material sheet, and the chemical solvent is quickly cleaned up, so that chemical dirt on the surface of the raw material sheet still exists, and workers wear protective gloves and wipe the surface of the chemical dirt by being stained with the chemical solvent until the chemical dirt is removed.

The raw material sheet used in S1 is a sheet having a thickness of 0.1 to 15 mm.

The lowest temperature in the S2 is 120 ℃, the heating time is 7-15S, and the highest temperature in the S2 is 180 ℃, the heating time is 10-15S.

The raw material sheet is firstly pretreated through the lowest temperature, so that the raw material sheet is slightly softened, the inside and the outside of the raw material sheet have certain temperatures at the same time, and then the temperature is raised, so that the raw material sheet is gradually softened thoroughly, direct high-temperature treatment is prevented, and after the outside of the raw material sheet is softened thoroughly, the inside of the raw material sheet is still in a low-temperature state, and the treatment of subsequent steps is influenced.

The cooling temperature in the S4 is 10-25 ℃, and the cooling time is 20-30S.

And the S1-S7 adopt an automatic feeding mode to convey the raw material sheet.

Carry raw and other materials sheet through automatic material loading mode, saved staff's the amount of labour greatly, the mode that the conveyer belt was carried can be selected to automatic material loading mode, for current comparatively mature technique, no longer gives unnecessary details here one by one.

In the case where the raw material sheet is damaged when it is cut in S5, the damaged raw material sheet is recovered as waste, and the raw material sheet is newly manufactured through S6.

The working principle of the vacuum plastic molding process provided by the invention is as follows:

firstly, selecting a raw material sheet, cleaning stains on the outer surface of the raw material sheet to ensure the purity of the raw material sheet, and drying after cleaning; then feeding the cleaned raw material sheet into a heating mechanism for heating treatment to soften the sheet, firstly heating the sheet at the lowest temperature for a period of time to slightly soften the sheet, and then gradually heating the sheet to the highest temperature to completely soften the sheet; then sending the softened raw material sheet into a required mould, closing the mould, opening a vacuum pump valve on the mould for vacuumizing, and controlling a vacuum valve to regulate the vacuum degree through a photoelectric tube until the raw material sheet reaches the required forming depth; then cooling the outer surface of the die by matching a water cooling mode and an air cooling mode until the inner raw material sheet is completely shaped; then, demoulding the raw material sheet after cold cutting and shaping, cutting by a die cutting machine, and cutting off the corner bulges and burrs to generate a finished product; then collecting the cut corner bulges and burrs, crushing the corner materials, mixing the crushed corner materials with the original material, and preparing a raw material sheet again; and finally, packaging the finished products out of the warehouse according to respective requirements of customers.

Compared with the related art, the vacuum plastic-sucking molding process provided by the invention has the following beneficial effects:

the invention fully cleans the raw material sheet, reduces the impurity mixing after molding, improves the quality of the finished product, enables the product to have plasticity by preheating firstly during heating and softening, further improves the quality of the finished product, can recycle the leftover materials generated by the product, reduces the cost, avoids the waste of resources and improves the environmental protection effect.

Second embodiment

Referring to fig. 2 to 3, a second embodiment of the present application provides another vacuum forming process based on the vacuum forming process provided in the first embodiment of the present application. The second embodiment is only the preferred mode of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

Specifically, the difference of the vacuum plastic molding technology that the second embodiment of this application provided lies in, mould includes bottom plate 1 in S3, four telescopic link 2 of top fixedly connected with of bottom plate 1, four fixedly connected with roof 3 between the top of telescopic link 2, movable mould 4 is installed to the bottom of roof 3, the top fixedly connected with mounting groove 5 of bottom plate 1, fixedly connected with heat exchanger fin 6 between the both sides of 5 inner walls of mounting groove, the inside of mounting groove 5 is provided with cover half 7, the inside of mounting groove 5 is inlayed and is had cooling coil 8, cooling coil 8 'S import and export all run through mounting groove 5 extends to the outside of mounting groove 5, cooling coil 8' S cross-section is the D type to the straight flange contacts with heat exchanger fin 6.

The periphery of the inner wall of the heat exchange plate 6 is in contact with the periphery of the outer wall of the fixed die 7, and the fixed die 7 can select various styles according to actual requirements.

The section of the cooling coil 8 is D-shaped, so that the contact area between the cooling coil and the heat exchange fins 6 is increased, and the cooling efficiency is improved.

The fixed mold 7 is further provided with a vacuum suction mouth and is connected with an external vacuum pump (not shown in the figure) through a pipeline and a valve, and the vacuum suction mouth is not described in detail for the existing mature technology.

The outlet of the cooling coil 8 is connected with an external water tank through a pipeline, cooling liquid is filled in the water tank, the water tank is connected with an inlet of an external cooling pump through a pipeline, and the outlet of the cooling pump is communicated with the inlet of the cooling coil 8 through a pipeline (not shown in the figure) to achieve the cooling liquid circulation function.

The pipeline accessible threaded connection mode between cooling coil 8 and the water tank is connected, and accessible threaded connection mode is connected between water tank upper tube way and the cooling pump import, and accessible threaded connection mode is connected between cooling pump outlet pipe way and the cooling coil 8, reaches the purpose of convenient dismantlement to add sealed the pad between the pipeline, guarantee its sealing performance.

The bottom fixedly connected with magnet piece 9 of 5 inner walls in mounting groove, the bottom fixedly connected with iron plate 10 of cover half 7, magnet piece 9 with the actuation of iron plate 10 is connected.

Through the attraction between the magnet block 9 and the iron block 10, the fixed die 7 is convenient to disassemble, so that the fixed die 7 with different specifications can be replaced according to actual requirements.

Compared with the related art, the vacuum plastic-sucking molding process provided by the invention has the following beneficial effects:

after the plastic uptake is accomplished, communicate with cooling pump and water tank through cooling coil 8, the cooling pump is carried to cooling coil 8 from cooling coil 8's import after with the coolant liquid cooling, carry out the heat transfer through cooling coil 8 and heat exchanger fin 6, heat exchanger fin 6 carries out the heat transfer with cover half 7, thereby lower the temperature to cover half 7, make inside product cool off, coolant liquid after the heat transfer discharges into in the water tank through cooling coil 8's export, through cooling pump cooling recirculation, can cool off the product fast and stereotype, be connected with the actuation of iron plate 10 through magnet piece 9 simultaneously, upwards add power slightly and can take off cover half 7, thereby can carry out the change of cover half 7 according to the actual demand, change fast, operation is simple, and the work efficiency is greatly improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.