CN210759204U

CN210759204U - Plastic film stretching and setting machine

Info

Publication number: CN210759204U
Application number: CN201921769136.3U
Authority: CN
Inventors: 石磊
Original assignee: Jinjiang Zhaoan Technology Co ltd
Current assignee: Jinjiang Zhaoan Technology Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-06-16
Anticipated expiration: 2029-10-21

Abstract

The utility model relates to a tensile forming machine of plastic film, including the frame that length direction is the same with plastic film direction of transfer, include at least a set of high temperature stretching device and cryogenic cooling setting device along plastic film direction of transfer in proper order, stretching device includes two sets of preceding stretching mechanism and the back stretching mechanism of mutually supporting, stretching mechanism includes fixed connection in the frame and along two fixed plates of frame width direction symmetric distribution, rotates and connects in the stretching roller of fixed plate and drive stretching roller pivoted driving motor, the linear velocity of back stretching roller is greater than the linear velocity of preceding stretching roller, has reduction in production cost and improves production efficiency's advantage.

Description

Plastic film stretching and setting machine

Technical Field

The utility model relates to a plastic film produces technical field, especially relates to a plastic film stretching and setting machine.

Background

Plastic films, films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, are used for packaging and as film-coated layers, and are widely applied to the fields of food, medicine, chemical industry and the like, wherein the proportion of food packaging is the largest, such as beverage packaging, quick-frozen food packaging, steamed food packaging, fast food packaging and the like, and the products bring great convenience to the life of people.

The plastic raw material is heated by an extruder to be sticky, then is pressurized to pass through a die with a certain shape to form a product with a shape similar to that of the die, is blown into a film by a film blowing machine, is stretched by a stretcher, and is cooled to form a plastic film with a certain shape and size, wherein the conventional stretcher generally comprises a support frame, a heating device for heating the plastic film, a left clamping piece, a right clamping piece and a control guide rail; heating device installs on the support frame and is located plastic film's feed end, and control guide fixed mounting sets up on the support frame and along plastic film's direction of travel, and left clamping piece and right clamping piece are all movable mounting on control guide. During the use, preformed plastic film passes through heating device on the stretcher earlier, soften under heating device's heating, later, pass left clamping piece clamp and fix on right clamping piece, right clamping piece takes plastic film to go forward certain distance to the discharge end, later, left clamping piece presss from both sides the middle part of fixing plastic film, later, right clamping piece continues to move forward to the discharge end, and thin to certain thickness with plastic film drawing, later, left clamping piece and right clamping piece loosen plastic film, plastic film continues to carry to the discharge end, and simultaneously, left clamping piece and right clamping piece resume initial position, in order to stretch next section plastic film.

The existing stretching machine has the defects of complex structure and high production cost, and the production of the plastic film is stopped when the left clamping piece and the right clamping piece stretch the plastic film and restore the initial position, so that the production efficiency of the plastic film is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a plastic film stretching and setting machine has reduction in production cost and improves production efficiency's advantage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a tensile forming machine of plastic film, includes the frame that length direction is the same with plastic film direction of transfer, includes at least a set of high temperature stretching device and low temperature cooling setting device along plastic film direction of transfer in proper order, stretching device includes two sets of preceding stretching mechanism and the back stretching mechanism of mutually supporting, stretching mechanism includes fixed connection in the frame and along two fixed plates of frame width direction symmetric distribution, rotates and connects in the stretching roller of fixed plate and drive stretching roller pivoted driving motor, the linear velocity of back stretching roller is greater than the linear velocity of preceding stretching roller.

Through adopting above-mentioned technical scheme, the setting has high temperature's stretching device, preceding stretching mechanism stretches plastic film with back stretching mechanism, the plastic film after stretching is stereotyped through low temperature cooling setting device again and is handled, reduce plastic film's shrinkage, guarantee tensile effect, can also carry plastic film at whole tensile and cooling design in-process, realize the tensile while carrying production, compare with the background art, plastic film's production efficiency has been improved greatly, and tensile forming machine's component part all is roller and driving motor commonly used among the plastic film stretching process, and manufacturing cost is lower.

The utility model discloses further set up to: the fixed plate is equipped with along vertical extension's spout, slide connect in the sliding block of spout and the adjusting part who adjusts the sliding block lift, tensile roller rotates to be connected in the sliding block, driving motor fixed connection is in the sliding block.

Through adopting above-mentioned technical scheme, the fixed plate is provided with the spout and supplies the steady sliding of sliding block, adjusts the high position of sliding block through adjusting part control to adjust the high position of tensile roller, adjust the clearance of each tensile roller on the high position, thereby the tensity and the tensile volume of control regulation plastic film satisfy production technology's requirement.

The utility model discloses further set up to: the adjusting component comprises a pressing strip fixedly connected to the upper end face of the fixing plate and used for preventing the sliding block from separating from the sliding groove, an elastic piece fixedly connected between the lower end face of the sliding block and the bottom wall of the sliding groove, an adjusting screw rod vertically arranged and in threaded connection with the pressing strip, and the lower end portion of the adjusting screw rod is abutted to the upper end face of the sliding block.

Through adopting above-mentioned technical scheme, adjusting screw is screwed up to the forward, forces the sliding block to slide downwards and compresses the elastic component for the elastic component has certain elastic potential energy, and the backward rotation adjusting screw, the elastic component forces the sliding block to slide upwards.

The utility model discloses further set up to: the upper end face of the adjusting screw rod is fixedly connected with a square fixing block for adjusting a wrench.

Through adopting above-mentioned technical scheme, make things convenient for adjusting screw's screwing and loosening.

The utility model discloses further set up to: the elastic piece is a compression spring, a circular groove is formed in the lower end face of the sliding block, a limiting lug is arranged on the bottom wall of the sliding groove in a protruding mode, the limiting lug is embedded in the lower end of the compression spring, and the upper end portion of the compression spring is embedded in the groove.

By adopting the technical scheme, the installation and the replacement of the compression spring are facilitated due to the arrangement of the slots and the limiting lugs.

The utility model discloses further set up to: the stretching roller in the front stretching mechanism is lower than the stretching roller in the rear stretching mechanism in height position.

By adopting the technical scheme, the plastic film surface is enabled to abut against the lower end face of the front stretching roller and the upper end face of the rear stretching roller, and the stretching effect is ensured.

The utility model discloses further set up to: the stretching device is provided with at least two groups.

Through adopting above-mentioned technical scheme, set up two sets of stretching devices at least, effectively prevent that plastic film from taking place the shrink at tensile in-process, further guarantee tensile effect.

The utility model discloses further set up to: the cooling setting device includes in proper order along plastic film direction of transfer and rotates the cooling setting roller and the negative pressure design carry over pinch rolls of connecting in the frame, and the negative pressure design carry over the micro vacuum pump that bleeds including the negative pressure roller that cavity set up and to the inner chamber of negative pressure roller, and the center pin of negative pressure roller rotates and is connected with the rotary joint that bleeds, and the aspirating hole has been seted up on the global of negative pressure roller, and micro vacuum pump passes through the exhaust tube and is connected with the rotary joint that bleeds.

Through adopting above-mentioned technical scheme, be provided with the negative pressure design carry over pinch rolls, on the one hand, effectively prevent that plastic film from taking place the phenomenon of skidding on the roll surface to influence tensile design effect, on the other hand prevents that the plastic film surface from being scratched, guarantees product quality.

To sum up, the utility model discloses following beneficial effect has:

1. the setting has high temperature's stretching device, and preceding stretching mechanism stretches plastic film with back stretching mechanism, and the plastic film after stretching through low-temperature cooling setting device is stereotyped again and is handled, reduces plastic film's shrinkage, guarantees tensile effect, can also carry plastic film at whole tensile and cooling design in-process, realizes the tensile production of carrying in the limit, has improved plastic film's production efficiency greatly.

2. The fixed plate is provided with the spout and supplies the steady sliding of sliding block, through the high position of adjusting part control regulation sliding block to adjust the high position of tensile roller, adjust the clearance on each tensile roller high position, thereby the tensile volume of control regulation plastic film satisfies production technology's requirement.

3. Be provided with the negative pressure design carry over pinch rolls, on the one hand, effectively prevent that plastic film from taking place the phenomenon of skidding on the roll surface to influence tensile design effect, on the other hand, prevent that plastic film surface from being scratched, guarantee product quality.

Drawings

FIG. 1 is a schematic view of the overall structure of a stretch setter for plastic films according to an embodiment;

FIG. 2 is a schematic structural view of a stretching apparatus of the embodiment;

FIG. 3 is a schematic structural diagram of a slider according to an embodiment;

fig. 4 is a schematic structural diagram of the cooling and shaping device of the embodiment.

In the figure, 1, a frame; 2. a stretching device; 2a, a front stretching mechanism; 2b, a rear stretching mechanism; 21. a fixing plate; 211. a chute; 212. a slider; 2121. sliding and protruding; 2122. grooving; 213. a limiting bump; 214. a support plate; 22. a stretching roller; 23. a drive motor; 25. A hydrothermal fluid rotary joint; 251. a liquid inlet pipe; 252. a liquid outlet pipe; 3. a cooling and shaping device; 31. cooling the sizing roller; 31a, a front cooling shaping roller; 31b, post-cooling the shaping roller; 32. a negative pressure shaping traction roller; 321. a negative pressure roller; 3211. an air exhaust hole; 3212. an air extraction rotary joint; 322. a micro vacuum pump; 4. a plastic film; 5. an adjustment assembly; 51. layering; 52. an elastic member; 53. adjusting the screw rod; 531. and (5) fixing blocks.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a plastic film stretching and setting machine comprises a frame 1 with the length direction being the same as the conveying direction of a plastic film 4, and two groups of high-temperature stretching devices 2 and a group of low-temperature cooling and setting devices 3 are sequentially arranged along the conveying direction of the plastic film 4, as shown in figure 1.

As shown in fig. 2 and fig. 3, the stretching device 2 includes two sets of front stretching mechanism 2a and rear stretching mechanism 2b which are matched with each other, and the stretching mechanism includes two fixing plates 21 which are fixedly connected to the frame 1 and symmetrically distributed along the width direction of the frame 1, a hollow stretching roller 22 rotatably connected to the fixing plates 21, and a driving motor 23 for driving the stretching roller 22 to rotate. The linear velocity of the rear stretching roller 22 is greater than that of the front stretching roller 22, and the stretching roller 22 in the front stretching mechanism 2a is lower in height position than the stretching roller 22 in the rear stretching mechanism 2 b. The fixed plate 21 is provided with a sliding groove 211 extending along the vertical direction, a sliding block 212 connected to the sliding groove 211 in a sliding manner, and an adjusting component 5 for adjusting the sliding block 212 to ascend and descend. The bottom wall protrusion of spout 211 is provided with spacing lug 213, and tensile roller 22 rotates to be connected in sliding block 212, and the both sides of sliding block 212 all are provided with the smooth protruding 2121 that slides and connect in spout 211, and circular fluting 2122 has been seted up to the lower terminal surface of sliding block 212, and the lateral wall fixedly connected with backup pad 214 of sliding block 212 that is located frame 1 one side, driving motor 23 fixed connection is on backup pad 214. The center shaft of the stretching roller 22 is provided with a heat conduction channel for heat conduction liquid to enter the inner cavity of the stretching roller 22, one end of the center shaft of the stretching roller 22, which is far away from the driving motor 23, is rotatably connected with a hydrothermal liquid rotating joint 25, and a liquid inlet and a liquid outlet of the hydrothermal liquid rotating joint 25 are respectively connected with a liquid inlet pipe 251 and a liquid outlet pipe 252.

The adjusting assembly 5 includes a pressing bar 51 fixedly connected to the upper end surface of the fixed plate 21 to prevent the sliding block 212 from being separated from the sliding slot 211, an elastic member 52 fixedly connected between the lower end surface of the sliding block 212 and the bottom wall of the sliding slot 211, and an adjusting screw 53 vertically disposed and threadedly connected to the pressing bar 51. The elastic element 52 is a compression spring, the upper end of the compression spring is embedded in the slot 2122, the lower end of the compression spring is sleeved on the limit bump 213, and the lower end of the compression spring abuts against the bottom wall of the slot 2122. The upper end face of the adjusting screw 53 is fixedly connected with a square fixing block 531 for adjusting a wrench, and the lower end part of the adjusting screw 53 abuts against the upper end face of the sliding block 212.

As shown in fig. 1 and 4, the cooling and shaping device 3 includes a cooling and shaping roller 31 and a negative pressure shaping pull roller 32 rotatably connected to the frame 1 in sequence along the conveying direction of the plastic film 4. The cooling design roller 31 includes two sets of preceding design rollers and the back design roller that mutually support and cavity set up, and the flowing water passageway has been seted up to the center pin of design roller, and the one end of the center pin of design roller is rotated and is connected with the cooling water rotary joint, and the water inlet and the delivery port of cooling water rotary joint are connected with inlet tube and outlet pipe respectively. The negative pressure design carry over pinch rolls 32 includes the negative pressure roller 321 that the cavity set up and carries out the micro vacuum pump 322 of bleeding to the inner chamber of negative pressure roller 321, and suction channel has been seted up to the center pin of negative pressure roller 321, and the center pin of negative pressure roller 321 rotates and is connected with the rotary joint 3212 of bleeding, and aspirating hole 3211 has been seted up to the global of negative pressure roller 321, and micro vacuum pump 322 is connected with the rotary joint 3212 of bleeding through the exhaust tube.

The working principle is as follows:

the heat-conducting liquid enters the inner cavity of the stretching roller 22 to heat the stretching roller 22, and the front stretching roller 22 and the rear stretching roller 22 stretch the plastic film 4 while conveying the plastic film 4; cold water enters the shaping roller to keep the shaping roller in a low-temperature state, and then the low-temperature shaping roller is used for shaping the stretched plastic film 4, so that the shrinkage of the plastic film 4 is reduced, the stretching effect is ensured, the plastic film 4 can be conveyed in the whole stretching and cooling shaping process, the production of stretching and conveying is realized, and the production efficiency of the plastic film 4 is greatly improved; micro vacuum pump 322 bleeds to negative pressure roller 321 inner chamber and makes it keep the negative pressure state, and plastic film 4 adsorbs at the lower surface of negative pressure roller 321, on the one hand, effectively prevents that plastic film 4 from taking place the phenomenon of skidding on the roll surface to influence tensile design effect, on the other hand prevents that plastic film 4 surface from being scratched, guarantees product quality.

Adjusting the gap of the stretching roller 22: the adjusting screw 53 is screwed forward to force the sliding block 212 to slide downwards to compress the elastic part 52, so that the elastic part 52 has certain elastic potential energy, the adjusting screw 53 is rotated reversely, the elastic part 52 forces the sliding block 212 to slide upwards, so that the height position of the stretching rollers 22 is adjusted, the gap of each stretching roller 22 on the height position is adjusted, the stretching speed and the stretching amount of the plastic film 4 are controlled and adjusted, and the requirements of the production process are met.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws within the scope of the present invention.

Claims

1. The utility model provides a plastic film stretch forming machine, includes that length direction and plastic film (4) direction of transfer are the same frame (1), characterized by: include at least a set of high temperature stretching device (2) and low temperature cooling setting device (3) in proper order along plastic film (4) direction of transfer, stretching device (2) include two sets of preceding stretching mechanism (2a) and back stretching mechanism (2b) of mutually supporting, stretching mechanism includes fixed connection in frame (1) and along two fixed plate (21) of frame (1) width direction symmetric distribution, rotate and connect in stretching roller (22) and drive stretching roller (22) pivoted driving motor (23) of fixed plate (21), the linear velocity of back stretching roller (22) is greater than the linear velocity of preceding stretching roller (22).

2. The plastic film stretching and setting machine as claimed in claim 1, wherein: fixed plate (21) are equipped with along vertical extension's spout (211), slide connect in sliding block (212) of spout (211) and regulation subassembly (5) that adjust sliding block (212) and go up and down, stretch roller (22) rotate connect in sliding block (212), driving motor (23) fixed connection is in sliding block (212).

3. The plastic film stretching and setting machine as claimed in claim 2, wherein: adjusting part (5) including fixed connection in the up end of fixed plate (21) in order to prevent that sliding block (212) from breaking away from layering (51) of spout (211), elastic component (52) and vertical setting and threaded connection between the lower terminal surface of sliding block (212) and the diapire of spout (211) in adjusting screw (53) of layering (51), the lower tip butt of adjusting screw (53) in the up end of sliding block (212).

4. A plastic film stretching and setting machine as claimed in claim 3, wherein: the upper end face of the adjusting screw rod (53) is fixedly connected with a square fixing block (531) for adjusting a wrench.

5. The stretch setter for plastic film as set forth in claim 4, further comprising: the elastic piece (52) is a compression spring, a round slot (2122) is formed in the lower end face of the sliding block (212), a limiting convex block (213) is arranged on the bottom wall of the sliding groove (211) in a protruding mode, the limiting convex block (213) is embedded in the lower end of the compression spring, and the upper end portion of the compression spring is embedded in the slot (2122).

6. A plastic film stretching-setting machine as claimed in claim 2 or 5, wherein: the drawing roller (22) in the front drawing mechanism (2a) is lower than the drawing roller (22) in the rear drawing mechanism (2b) in height position.

7. The plastic film stretching and setting machine as claimed in claim 6, wherein: the stretching devices (2) are at least provided with two groups.

8. The plastic film stretching and setting machine as claimed in claim 7, wherein: cooling setting device (3) are including rotating cooling setting roller (31) and the negative pressure design carry over pinch rolls (32) of connecting in frame (1) along plastic film (4) direction of transfer in proper order and, negative pressure design carry over pinch rolls (32) including negative pressure roller (321) that cavity set up and carry out micro vacuum pump (322) of bleeding to the inner chamber of negative pressure roller (321), the center pin of negative pressure roller (321) rotates and is connected with rotary joint (3212) of bleeding, bleeder hole (3211) have been seted up to the global of negative pressure roller (321), micro vacuum pump (322) are connected with rotary joint (3212) of bleeding through the exhaust tube.