阅读说明：本技术 一种保鲜膜生产工艺 (Production process of preservative film ) 是由 侯哲宇 夏文进 于 2020-05-30 设计创作，主要内容包括：本发明涉及一种保鲜膜生产工艺,包括底板、支撑架和牵引装置,所述的底板上端安装有支撑架,支撑架截面呈U型结构,支撑架内部安装有牵引装置。本发明可以解决现有的设备在对保鲜膜进行冷却导引时,通常不能够快速的对导向板进行冷却降温,导致熔融状态的薄膜易粘附在导向辊表面上,使得制备后的薄膜易发生破损的现象,而且现有的设备在对制备后的薄膜进行收卷时,薄膜表面容易存在较多的褶皱的现象,同时不能够有效的将薄膜内的气体完全排出,导致收卷后的薄膜容易发生破裂的现象,影响薄膜的后续使用效果等难题。(The invention relates to a preservative film production process which comprises a bottom plate, a support frame and a traction device, wherein the support frame is installed at the upper end of the bottom plate, the cross section of the support frame is of a U-shaped structure, and the traction device is installed inside the support frame. The device can solve the problems that when the existing device is used for cooling and guiding the preservative film, the guide plate cannot be cooled rapidly, the film in a molten state is easy to adhere to the surface of the guide roller, so that the prepared film is easy to damage, when the existing device is used for winding the prepared film, the surface of the film is easy to have more wrinkles, meanwhile, the gas in the film cannot be effectively and completely discharged, so that the wound film is easy to crack, the subsequent use effect of the film is influenced, and the like.)

1. The utility model provides a plastic wrap production technology, this plastic wrap production technology adopts following processing equipment, and this processing equipment includes bottom plate (1), support frame (2) and draw gear (3), its characterized in that: the upper end of the bottom plate (1) is provided with a support frame (2), the section of the support frame (2) is of a U-shaped structure, and a traction device (3) is arranged in the support frame (2); wherein:

the traction device (3) comprises a traction roller (31), a guide mechanism (32), an arc-shaped groove (33), a telescopic spring (34), an adjusting mechanism (35), a pressing mechanism (36) and an exhaust mechanism (37), a clamping groove is formed in the upper end of the support frame (2), the traction roller (31) is symmetrically installed in the clamping groove through a bearing, the guide mechanism (32) is installed on the traction roller (31) through the bearing, the arc-shaped groove (33) is formed in the inner side wall of the support frame (2), the outer side of the guide mechanism (32) is connected with the arc-shaped groove (33) in a sliding fit mode, the telescopic spring (34) is installed between the guide mechanism (32) and the arc-shaped groove (33), the adjusting mechanism (35) is symmetrically installed in the support frame (2), the middle part of the inner side face of the adjusting mechanism (35) is tightly attached to the middle part of the, an exhaust mechanism (37) is arranged below the pressing mechanism (36), and the exhaust mechanism (37) is arranged on the support frame (2);

the guide mechanism (32) comprises a connecting frame (321), guide plates (322), a condensing unit (323), guide rollers (324) and cleaning units (325), the connecting frame (321) is mounted on the outer side of the traction roller (31) through bearings, the guide plates (322) are mounted at the lower ends of the connecting frame (321), the condensing unit (323) is mounted in the middle of each guide plate (322), the guide rollers (324) are uniformly mounted on the condensing unit (323) through the bearings, the cleaning units (325) are arranged between the adjacent guide rollers (324), and the cleaning units (325) are mounted inside the guide plates (322);

the condensing unit (323) comprises a condensing tube (3231), a liquid inlet tube (3232) and a liquid outlet tube (3233), the condensing tube (3231) is installed in the middle of the guide plate (322), the condensing tube (3231) is arranged in an S shape, the condensing tube (3231) is connected with the guide roller (324) through a bearing, the liquid outlet tube (3233) is installed at the upper end of the condensing tube (3231), and the liquid inlet tube (3232) is installed at the lower end of the condensing tube (3231);

the production process of the preservative film comprises the following steps:

s1, raw material feeding: cleaning and weighing raw materials to be processed, and then sending the raw materials into a heating barrel;

s2, melting and plasticizing: heating, melting and plasticizing the raw material in the step S1;

s3, extruding a film tube: extruding the plastic raw material in the molten state in the step S2 into a circular bubble tube through an extrusion die head;

s4, inflation: blowing the round bubble tube in the step S3 by compressed air to form a plastic film;

s5, cooling and drawing: the plastic film formed in the step S4 enters the guide mechanism (32) through the traction roller (31), the guide mechanism (32) can guide the film and effectively cool the film at the same time, so that the film is cooled and shaped conveniently, the pressing mechanism (36) can press and shape the film to prevent the film from wrinkling, the exhaust mechanism (37) can exhaust gas in the film to prevent the film from cracking during rolling;

s6, rolling the film: and winding and collecting the film formed in the step S5 through a winding roller.

2. The preservative film production process according to claim 1, characterized in that: the adjusting mechanism (35) comprises an adjusting rod (351), a moving block (352), a fixed frame (353), a sliding rod (354), a sliding block (355) and a return spring (356), the supporting frame (2) is internally and symmetrically provided with a fixing frame (353), an adjusting rod (351) is arranged between the middle of the fixing frame (353) and the upper end of the supporting frame (2) through a bearing, the adjusting rod (351) is connected with a moving block (352) in a thread fit mode, the cross section of the moving block (352) is of a trapezoidal structure, through holes are symmetrically formed in the fixing frame (353), a sliding rod (354) is connected in the through holes in a sliding fit mode, a sliding block (355) is installed on the inner side of the sliding rod (354), the sliding block (355) is tightly attached to the moving block (352), a reset spring (356) is installed in the middle of the sliding rod (354), rollers are installed on the outer side of the sliding.

3. The preservative film production process according to claim 1, characterized in that: the pressing mechanism (36) comprises sliding blocks (361), compression springs (362), air inlet pipes (363) and compression rollers (364), sliding grooves are symmetrically formed in the middle of the supporting frame (2), the sliding blocks (361) are symmetrically installed in the sliding grooves, the compression springs (362) are installed between the sliding blocks (361) and the sliding grooves, the air inlet pipes (363) are installed between the sliding blocks (361) through bearings, the compression rollers (364) are installed on the air inlet pipes (363), through holes are evenly formed in the air inlet pipes (363), and the air inlet pipes (363) are connected with external hot steam.

4. The preservative film production process according to claim 1, characterized in that: cleaning element (325) including cleaning plate (3251) and coupling spring (3252), deflector (322) inside evenly be provided with I-shaped groove, cleaning plate (3251) are installed through sliding fit's mode symmetry in the I-shaped groove, evenly install coupling spring (3252) between two cleaning plate (3251), cleaning plate (3251) are made for rigid plastic material, cleaning plate (3251) outside is hugged closely with guide roll (324).

5. The preservative film production process according to claim 1, characterized in that: exhaust mechanism (37) include diaphragm (371), connecting rod (372), fixed spring (373) and exhaust frame (374), support frame (2) inside lower extreme symmetry install diaphragm (371), evenly be provided with logical groove on diaphragm (371), be provided with connecting rod (372) in the logical groove, be provided with fixed spring (373) on connecting rod (372), install exhaust frame (374) between connecting rod (372) inboard.

6. The preservative film production process according to claim 5, wherein: the exhaust frame (374) is in a herringbone structure, and elastic pads are uniformly arranged on the inner side surface of the exhaust frame (374).

Technical Field

The invention relates to the field of preservative film production and processing, in particular to a preservative film production process.

Background

The plastic wrap is a plastic packaging product, and is usually prepared by taking ethylene as a master batch through polymerization reaction, and the plastic wrap can be divided into three categories: the first is polyethylene, abbreviated as PE; the second is polyvinyl chloride, PVC for short; the third is polyvinylidene chloride, abbreviated as PVDC. In daily life, people use more and more preservative films, and in order to prevent secondary pollution, the objects stored in the refrigerator need to be sealed by the preservative films.

At present, the existing preservative film generally has the following defects in the production and processing process: 1. when the existing equipment is used for cooling and guiding the preservative film, the guide plate cannot be cooled rapidly, so that the film in a molten state is easy to adhere to the surface of the guide roller, and the prepared film is easy to damage; 2. when the prepared film is rolled by the conventional equipment, the surface of the film is easy to have more wrinkles, and meanwhile, the gas in the film cannot be effectively and completely discharged, so that the rolled film is easy to crack, and the subsequent use effect of the film is influenced.

Disclosure of Invention

Technical problem to be solved

The device can solve the problems that when the existing device is used for cooling and guiding the preservative film, the guide plate cannot be cooled rapidly, the film in a molten state is easy to adhere to the surface of the guide roller, so that the prepared film is easy to damage, when the existing device is used for winding the prepared film, the surface of the film is easy to have more wrinkles, meanwhile, the gas in the film cannot be effectively and completely discharged, so that the wound film is easy to crack, the subsequent use effect of the film is influenced, and the like.

(II) technical scheme

In order to achieve the purpose, the invention adopts the following technical scheme that the preservative film production process adopts the following processing equipment, the processing equipment comprises a bottom plate, a supporting frame and a traction device, the supporting frame is installed at the upper end of the bottom plate, the section of the supporting frame is of a U-shaped structure, and the traction device is installed inside the supporting frame.

The traction device comprises a traction roller, a guide mechanism, an arc-shaped groove, a telescopic spring, an adjusting mechanism, a pressing mechanism and an exhaust mechanism, wherein the upper end of the support frame is provided with a clamping groove, the traction roller is symmetrically arranged in the clamping groove through a bearing, the guide mechanism is arranged on the traction roller through a bearing, the arc-shaped groove is arranged on the inner side wall of the support frame, the outer side of the guide mechanism is connected with the arc-shaped groove in a sliding fit mode, the telescopic spring is arranged between the guide mechanism and the arc-shaped groove, the adjusting mechanism is symmetrically arranged in the support frame, the adjusting mechanism is tightly attached to the middle part of the inner side surface of the guide mechanism, the pressing mechanism is arranged in the middle of the support frame, the exhaust mechanism is arranged below the pressing mechanism, the exhaust mechanism is arranged on the support frame, when the traction device works specifically, the film cooling of being convenient for is stereotyped, and adjustment mechanism can open the angle to guiding mechanism and adjust, and hold-down mechanism can compress tightly the design to the film, prevents that the phenomenon of fold from appearing in the film, and exhaust mechanism can cause the film to take place cracked phenomenon during the rolling with the gas outgoing in the film.

Guiding mechanism include link, deflector, condensing unit, guide roll and cleaning unit, the link pass through the bearing and install in the carry over pinch rolls outside, the deflector is installed to the link lower extreme, the deflector mid-mounting has the condensing unit, evenly install the guide roll through the bearing on the condensing unit, be provided with the cleaning unit between the adjacent guide roll, the cleaning unit is installed inside the deflector, concrete during operation, when the film gets into the deflector inside through the carry over pinch rolls, the guide roll can effectually reduce the friction between film and the deflector, the condensing unit can cool down the guide roll, do benefit to the film shaping, the cleaning unit can clear up the guide roll surface, prevent that plastic impurity from adhering at the guide roll surface.

The condensing unit include condenser pipe, feed liquor pipe and drain pipe, deflector mid-mounting have the condenser pipe, the condenser pipe is the S type range, the condenser pipe is connected with the guide roll through the bearing, the drain pipe is installed to the condenser pipe upper end, the feed liquor pipe is installed to the condenser pipe lower extreme, concrete during operation, feed liquor pipe and drain pipe are connected with external cold water pump, feed liquor pipe and drain pipe and then can let in the condenser pipe with cold water circulation inside, can the effectual cooling effect of guaranteeing the condenser pipe.

The production process of the preservative film comprises the following steps:

s1, raw material feeding: cleaning and weighing raw materials to be processed, and then sending the raw materials into a heating barrel;

s2, melting and plasticizing: heating, melting and plasticizing the raw material in the step S1;

s3, extruding a film tube: extruding the plastic raw material in the molten state in the step S2 into a circular bubble tube through an extrusion die head;

s4, inflation: blowing the round bubble tube in the step S3 by compressed air to form a plastic film;

s5, cooling and drawing: the plastic film formed in the step S4 enters the guide mechanism through the traction roller, the guide mechanism can guide the film and can effectively cool the film so as to facilitate cooling and shaping of the film, the pressing mechanism can press and shape the film so as to prevent the film from wrinkling, and the exhaust mechanism can exhaust gas in the film so as to prevent the film from cracking during rolling;

s6, rolling the film: and winding and collecting the film formed in the step S5 through a winding roller.

Preferably, the adjusting mechanism comprises an adjusting rod, a moving block, a fixed frame, a sliding rod, a sliding block and a return spring, the inner part of the supporting frame is symmetrically provided with a fixed frame, an adjusting rod is arranged between the middle part of the fixed frame and the upper end of the supporting frame through a bearing, a moving block is connected on the adjusting rod in a thread fit mode, the cross section of the moving block is in a trapezoidal structure, through holes are symmetrically arranged on the fixed frame, a sliding rod is connected in the through holes in a sliding fit mode, a sliding block is arranged on the inner side of the sliding rod, the sliding block is tightly attached to the moving block, the middle part of the sliding rod is provided with a reset spring, the outer side of the, the adjusting rod is rotated manually, the adjusting rod drives the moving block to move upwards in a thread fit mode, the moving block drives the sliding rod to expand outwards in an extrusion mode, and the sliding rod adjusts the angle between the two guide mechanisms through the roller.

Preferably, hold-down mechanism include sliding block, compression spring, intake pipe and compression roller, support frame middle part symmetry be provided with the sliding tray, the sliding block is installed to the sliding tray symmetry, install compression spring between sliding block and the sliding tray, install the intake pipe through the bearing between the sliding block, install the compression roller in the intake pipe, evenly be provided with the through-hole in the intake pipe, the intake pipe is connected with external hot steam, concrete during operation, compression spring drives two compression rollers through the sliding block and hugs closely, the intake pipe with can heat the compression roller, the compression roller can carry out hot pressing to the fold department on film surface, avoid the film to take place the phenomenon of fold.

Preferably, the clearance unit include cleaning plate and coupling spring, the inside I shape groove that evenly is provided with of deflector, the cleaning plate is installed through sliding fit's mode symmetry in the I shape inslot, evenly install coupling spring between two cleaning plates, the cleaning plate is made for rigid plastic material, the cleaning plate outside is hugged closely with the guide roll, specific during operation, coupling spring drives the cleaning plate and hugs closely with the guide roll surface all the time, the cleaning plate and then can clear up the refrigerated plastics impurity of adhesion on the guide roll, prevent that impurity from causing the scratch to the film surface.

Preferably, exhaust mechanism include diaphragm, connecting rod, fixed spring and exhaust frame, the inside lower extreme symmetry of support frame install the diaphragm, evenly be provided with logical groove on the diaphragm, logical inslot is provided with the connecting rod, is provided with fixed spring on the connecting rod, installs the exhaust frame between the connecting rod inboard, when concrete work, fixed spring drives two exhaust frames and hugs closely all the time, the exhaust frame can be with the inside gaseous by interior discharge outside of film, prevent that the film is inside to remain gaseous, does benefit to the follow-up rolling of film.

Preferably, the exhaust frame is in a herringbone structure, and elastic pads are uniformly arranged on the inner side surface of the exhaust frame.

(III) advantageous effects

1. According to the preservative film production process provided by the invention, the guide mechanism can effectively cool the blown and formed film, so that the film is processed and formed easily, and plastic impurities adhered to the surface of the guide roller can be cleaned, so that the phenomenon that the surface of the film is scratched by the impurities is avoided;

2. according to the preservative film production process provided by the invention, the pressing mechanism can carry out hot-pressing processing on the prepared film, so that the phenomenon that the surface of the prepared film is wrinkled is prevented, and the subsequent processing and use of the film are facilitated;

3. according to the preservative film production process provided by the invention, the exhaust mechanism can effectively exhaust the gas in the prepared film, so that the gas is prevented from remaining in the film, and the phenomenon of breakage of the film during rolling is avoided.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic cross-sectional view of the support frame, the pulling roll, the guiding mechanism, the arc-shaped groove, the expansion spring and the adjusting mechanism;

FIG. 4 is a schematic cross-sectional view of the guide mechanism of the present invention;

FIG. 5 is a schematic cross-sectional view of the bottom plate, the supporting frame, the pressing mechanism and the exhausting mechanism of the present invention;

fig. 6 is a schematic cross-sectional view of the bottom plate, the supporting frame and the pressing mechanism according to the present invention.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 to 6, the preservative film production process adopts the following processing equipment, the processing equipment comprises a bottom plate 1, a support frame 2 and a traction device 3, the support frame 2 is installed at the upper end of the bottom plate 1, the cross section of the support frame 2 is of a U-shaped structure, and the traction device 3 is installed inside the support frame 2.

The traction device 3 comprises a traction roller 31, a guide mechanism 32, an arc-shaped groove 33, a telescopic spring 34, an adjusting mechanism 35, a pressing mechanism 36 and an exhaust mechanism 37, wherein the upper end of the support frame 2 is provided with a clamping groove, the traction roller 31 is symmetrically installed in the clamping groove through a bearing, the guide mechanism 32 is installed on the traction roller 31 through a bearing, the arc-shaped groove 33 is arranged on the inner side wall of the support frame 2, the outer side of the guide mechanism 32 is connected with the arc-shaped groove 33 in a sliding fit manner, the telescopic spring 34 is installed between the guide mechanism 32 and the arc-shaped groove 33, the adjusting mechanism 35 is symmetrically installed in the support frame 2, the adjusting mechanism 35 is tightly attached to the middle of the inner side face of the guide mechanism 32, the pressing mechanism 36 is installed in the middle of the support frame 2, the exhaust mechanism 37 is arranged below the pressing mechanism 36, the exhaust mechanism 37 is installed, guiding mechanism 32 can guide the film, can carry out effectual cooling to the film simultaneously, and the film cooling of being convenient for is stereotyped, and adjustment mechanism 35 can open the angle to guiding mechanism 32 and adjust, and hold-down mechanism 36 can compress tightly the design to the film, prevents that the phenomenon of fold from appearing in the film, and exhaust mechanism 37 can be with the gas outgoing in the film, causes the cracked phenomenon of film emergence when preventing the rolling.

Guiding mechanism 32 include link 321, deflector 322, condensing unit 323, guide roll 324 and cleaning unit 325, link 321 install in the carry over pinch rolls 31 outside through the bearing, deflector 322 is installed to link 321 lower extreme, deflector 322 mid-mounting has condensing unit 323, evenly install guide roll 324 through the bearing on the condensing unit 323, be provided with cleaning unit 325 between the adjacent guide roll 324, cleaning unit 325 is installed inside deflector 322, in concrete work, when the film gets into deflector 322 inside through carry over pinch rolls 31, guide roll 324 can be effectual reduces the friction between film and the deflector 322, condensing unit 323 can cool down guide roll 324, do benefit to the film shaping, cleaning unit 325 can clear up guide roll 324 surface, prevent that plastic impurities from adhering at the guide roll 324 surface.

Condensing unit 323 include condenser pipe 3231, feed liquor pipe 3232 and drain pipe 3233, deflector 322 mid-mounting have condenser pipe 3231, condenser pipe 3231 is the S type and arranges, condenser pipe 3231 is connected with guide roll 324 through the bearing, drain pipe 3233 is installed to condenser pipe 3231 upper end, feed liquor pipe 3232 is installed to condenser pipe 3231 lower extreme, specific during operation, feed liquor pipe 3232 and drain pipe 3233 are connected with external cold water pump, feed liquor pipe 3232 and drain pipe 3233 and then can let in condenser pipe 3231 inside with cold water circulation, can effectually guarantee condenser pipe 3231' S cooling effect.

Cleaning unit 325 include cleaning plate 3251 and coupling spring 3252, inside I-shaped groove that evenly is provided with of deflector 322, cleaning plate 3251 is installed through sliding fit's mode symmetry in the I-shaped groove, evenly install coupling spring 3252 between two cleaning plate 3251, cleaning plate 3251 is made for hard plastic material, the cleaning plate 3251 outside is hugged closely with guide roll 324, during specific work, coupling spring 3252 drives cleaning plate 3251 and hugs closely with guide roll 324 surface all the time, cleaning plate 3251 and then can clear up the refrigerated plastic impurity of adhesion on guide roll 324, prevent that impurity from causing the scratch to the film surface.

The adjusting mechanism 35 comprises an adjusting rod 351, a moving block 352, a fixed frame 353, a sliding rod 354, a sliding block 355 and a return spring 356, the fixed frame 353 is symmetrically installed inside the supporting frame 2, the adjusting rod 351 is installed between the middle of the fixed frame 353 and the upper end of the supporting frame 2 through a bearing, the moving block 352 is connected to the adjusting rod 351 in a threaded fit mode, the cross section of the moving block 352 is of a trapezoidal structure, through holes are symmetrically formed in the fixed frame 353, the sliding rod 354 is connected to the through holes in a sliding fit mode, the sliding block 355 is installed on the inner side of the sliding rod 354 and is tightly attached to the moving block 352, the return spring 356 is installed at the middle of the sliding rod 354, a roller is installed on the outer side of the sliding rod 354 and is tightly attached to the guiding mechanism 32, when the adjusting rod 351 is manually rotated during specific work, the adjusting rod 351 drives, the slide rod 354 adjusts the angle between the two guide mechanisms 32 by means of rollers.

Hold-down mechanism 36 include sliding block 361, compression spring 362, intake pipe 363 and compression roller 364, 2 middle symmetry of support frame be provided with the sliding tray, the sliding block 361 is installed to the symmetry in the sliding tray, install compression spring 362 between sliding block 361 and the sliding tray, install intake pipe 363 through the bearing between the sliding block 361, install compression roller 364 on the intake pipe 363, evenly be provided with the through-hole on the intake pipe 363, intake pipe 363 is connected with external hot steam, during specific work, compression spring 362 drives two compression roller 364 through sliding block 361 and hugs closely, intake pipe 363 with can heat compression roller 364, compression roller 364 can carry out the hot pressing to the fold department on film surface, avoid the phenomenon that the film takes place the fold.

Exhaust mechanism 37 include diaphragm 371, connecting rod 372, fixed spring 373 and exhaust frame 374, the inside lower extreme symmetry of support frame 2 install diaphragm 371, evenly be provided with logical groove on diaphragm 371, be provided with connecting rod 372 in the logical groove, be provided with fixed spring 373 on connecting rod 372, install exhaust frame 374 between the connecting rod 372 inboard, exhaust frame 374 be chevron shape structure, evenly be provided with the cushion on the exhaust frame 374 medial surface, during specific work, fixed spring 373 drives two exhaust frames 374 and hugs closely all the time, exhaust frame 374 can be with the inside gas from interior to exterior discharge of film, prevent that the inside gas that remains of film, do benefit to the follow-up rolling of film.

The production process of the preservative film comprises the following steps:

s1, raw material feeding: cleaning and weighing raw materials to be processed, and then sending the raw materials into a heating barrel;

s2, melting and plasticizing: heating, melting and plasticizing the raw material in the step S1;

s3, extruding a film tube: extruding the plastic raw material in the molten state in the step S2 into a circular bubble tube through an extrusion die head;

s4, inflation: blowing the round bubble tube in the step S3 by compressed air to form a plastic film;

s5, cooling and drawing: the plastic film formed in the step S4 enters the guide mechanism 32 through the traction roller 31, the guide mechanism 32 can guide the film and can effectively cool the film, so as to facilitate cooling and shaping of the film, the pressing mechanism 36 can press and shape the film, so as to prevent the film from wrinkling, and the exhaust mechanism 37 can exhaust gas in the film, so as to prevent the film from cracking during winding;

s6, rolling the film: and winding and collecting the film formed in the step S5 through a winding roller.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.