Cooling equipment for plastic film extrusion

Abstract

The utility model relates to the technical field of plastic film production, and particularly discloses a cooling device for plastic film extrusion, which comprises a rack, a cooling water circulation device arranged on one side of the rack, and a conveying roller group and a connecting rod which are arranged on the rack, the lower cooling rollers are arranged on one side of the conveying roller set, the upper cooling rollers are arranged at the tops of the lower cooling rollers, and a lifting piece used for adjusting the upper cooling rollers to ascend and descend is installed on the rack; the water inlet ends of the lower cooling roller and the upper cooling roller which are arranged far away from the conveying roller group are connected through the input pipe; the water outlet ends of the lower cooling roller and the upper cooling roller which are arranged close to the conveying roller group are connected through the output pipe; according to the plastic film cooling device, thermal stress can be reduced in a step-by-step cooling mode, so that plastic films are more stable and not prone to deformation in the cooling process, it is ensured that the plastic films are more stable in the cooling process, the rejection rate caused by deformation, cracking and other problems is reduced, the cooling effect of the plastic films is improved, and continuous and stable cooling can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of plastic film production technology, specifically to a cooling device for plastic film extrusion. Background Technology

[0002] Cooling after plastic film extrusion is a crucial step that directly affects the final quality and performance of the product. During the plastic film extrusion process, the molten plastic material needs to be rapidly cooled and solidified after being extruded through the die. The cooling process ensures that the product achieves stable dimensions and shape, while reducing internal stress and warping issues, and improving the surface quality and overall performance of the product.

[0003] The extruded plastic film cooling device disclosed in the existing patent publication number CN220331936U includes: a cold air blower, the air supply end of the cold air blower is connected to a distribution box, the distribution box is provided with multiple distribution pipes, the other end of the distribution pipes is connected to a cooling roller, the cooling roller includes a roller body with a cooling cavity, and the other end of the cooling roller is connected to an air collection box; by setting up the cold air blower, cooling roller, distribution box, and air collection box, the device is installed at the extrusion blown film machine during use. The plastic film output by the extrusion blown film machine is transported to the roller body in the cooling roller. At this time, the cold air blower is started, and the cold air is transmitted through the cooling channel composed of the distribution box, cooling roller, and air collection box. Since the cooling cavity contains a cooling medium, it exchanges heat with the plastic film, thereby cooling the plastic film.

[0004] The aforementioned device uses cold air placed inside the cooling rollers for cooling, with the air exiting through the exhaust screen. This affects the stable transport of the plastic film during cooling, and the cooling effect of the plastic film still needs improvement. To address these issues, a cooling device for plastic film extrusion is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a cooling device for plastic film extrusion to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] Cooling equipment for plastic film extrusion includes a frame and a cooling water circulation device disposed on one side of the frame, and also includes a conveyor roller assembly and connecting rods mounted on the frame;

[0008] A plurality of lower cooling rollers are arranged on one side of the conveyor roller assembly, and a plurality of upper cooling rollers are arranged on top of the lower cooling rollers. A lifting mechanism for adjusting the raising and lowering of the upper cooling rollers is mounted on the frame. An input pipe connects the water inlet ends of the lower and upper cooling rollers located away from the conveyor roller assembly. An output pipe connects the water outlet ends of the lower and upper cooling rollers located close to the conveyor roller assembly.

[0009] Connecting pipe fittings are used to connect the ends of two adjacent sets of the lower cooling rollers or the ends of two adjacent sets of the upper cooling rollers.

[0010] In one alternative: the end of the upper cooling roller is rotatably connected to a lifting block, and the frame is provided with a lifting groove for the lifting block to slide.

[0011] In one alternative: the lifting component includes an electrically operated telescopic rod mounted on the top of the frame, the movable end of the bottom power output end of the electrically operated telescopic rod extending into the lifting groove and connecting to the top of the lifting block.

[0012] In one alternative: the connecting pipe includes a connecting pipe and rotary joints connected to both ends of the connecting pipe, and the ends of the lower cooling roller and the upper cooling roller are both connected to the rotary joints.

[0013] In one alternative: both the input pipe and the output pipe include a first water pipe and a second water pipe, which are connected by a corrugated pipe. The first water pipe is connected to a rotary joint corresponding to the upper cooling roller, and the second water pipe is connected to a rotary joint corresponding to the lower cooling roller.

[0014] In one alternative: a one-way valve is installed in both the first and second water pipes.

[0015] In one alternative: the outlet end of the output pipe is connected to a water supply pipe.

[0016] In one alternative: the bottom of the frame is connected to casters.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In this invention, the conveying roller assembly assists in conveying the plastic film, allowing it to be transported between the lower and upper cooling rollers for cooling. A cooling water circulation system inputs cooling water into the input pipe, which then flows between several lower and upper cooling rollers. The cooling water absorbs heat from the plastic film, cooling it gradually. This gradual cooling method reduces thermal stress, making the plastic film more stable and less prone to deformation during the cooling process. This ensures greater stability during cooling, reduces the scrap rate caused by deformation and cracking, improves the cooling effect of the plastic film, and allows for continuous and stable cooling. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure where the upper and lower cooling rollers are installed in this utility model.

[0021] Figure 3This is a partial structural schematic diagram of the present invention.

[0022] Figure 4 This is a schematic diagram of the upper cooling roller in this utility model.

[0023] In the diagram: 11. Frame; 12. Cooling water circulation equipment; 13. Moving wheels; 14. Conveyor roller assembly; 15. Connecting rod; 16. Lower cooling roller; 17. Upper cooling roller; 18. Input pipe; 19. Water supply pipe; 20. Output pipe; 21. Rotary joint; 22. Connecting pipe; 23. Lifting block; 24. Electric telescopic rod; 25. Lifting trough. Detailed Implementation

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 In this embodiment, the cooling device for plastic film extrusion includes a frame 11 and a cooling water circulation device 12 disposed on one side of the frame 11, and also includes a conveying roller group 14 and a connecting rod 15 mounted on the frame 11.

[0027] A plurality of lower cooling rollers 16 are arranged on one side of the conveyor roller group 14, and a plurality of upper cooling rollers 17 are arranged on top of the lower cooling rollers 16. A lifting device for adjusting the raising and lowering of the upper cooling rollers 17 is installed on the frame 11. An input pipe 18 connects the water inlet ends of the lower cooling rollers 16 and upper cooling rollers 17 located away from the conveyor roller group 14. An output pipe 20 connects the water outlet ends of the lower cooling rollers 16 and upper cooling rollers 17 located near the conveyor roller group 14.

[0028] Connecting pipe fittings are used to connect the ends of two adjacent sets of lower cooling rollers 16 or the ends of two adjacent sets of upper cooling rollers 17.

[0029] Using the above scheme, the conveying roller group 14 can assist in the conveying of the plastic film, so that the plastic film is conveyed between the lower cooling roller 16 and the upper cooling roller 17 for cooling. The cooling water circulation device 12 inputs cooling water into the input pipe 18, and then flows between several lower cooling rollers 16 and several upper cooling rollers 17. The cooling water absorbs the heat of the plastic film and cools the plastic film. Then the cooling water is output from the output pipe 20. The plastic film is cooled during the conveying process.

[0030] Inside the lower cooling roller 16 and the upper cooling roller 17, the cooling water temperature on the side closer to the conveying roller group 14 is higher than the cooling water temperature on the side farther away from the conveying roller group 14. This avoids excessively fast cooling during the plastic film forming process, which could lead to excessive temperature difference between the inside and outside of the plastic film and increase thermal stress. The gradual cooling method of this application can reduce this thermal stress, making the plastic film more stable and less prone to deformation during the cooling process.

[0031] like Figure 2 and Figure 3 As shown, the upper cooling roller 17 is rotatably connected to the lifting block 23 at its end, and the frame 11 is provided with a lifting groove 25 for the lifting block 23 to slide; the lifting block 23 slides up and down in the lifting groove 25 without affecting the rotation of the upper cooling roller 17.

[0032] like Figure 3 As shown, the lifting component includes an electric telescopic rod 24 installed on the top of the frame 11. The movable end of the bottom power output end of the electric telescopic rod 24 extends into the lifting groove 25 and connects to the top of the lifting block 23. The electric telescopic rod 24 is a tooling that allows the lifting block 23 to slide within the lifting groove 25.

[0033] like Figure 3 As shown, the connecting pipe includes a connecting pipe 22 and a rotary joint 21 connected to both ends of the connecting pipe 22. The ends of the lower cooling roller 16 and the upper cooling roller 17 are both connected to the rotary joint 21. The rotary joint 21 is an existing pipe connection device that allows the connected pipes to rotate relative to each other. When the upper cooling roller 17 and the lower cooling roller 16 rotate, it does not affect the stable delivery of cooling water.

[0034] like Figure 3 As shown, both the input pipe 18 and the output pipe 20 include a first water pipe and a second water pipe, which are connected by a corrugated pipe. The first water pipe is connected to a rotary joint 21 corresponding to the upper cooling roller 17, and the second water pipe is connected to a rotary joint 21 corresponding to the lower cooling roller 16. The input pipe 18 can be used for the input of cooling water, and the output pipe 20 can be used for the output of cooling water after use. The corrugated pipe is designed so that the delivery of cooling water is not affected when the height of the upper cooling roller 17 is adjusted.

[0035] Furthermore, one-way valves are installed in both the first and second water pipes; the one-way valve in the input pipe 18 can be used for one-way water inflow, and the one-way valve in the output pipe 20 can be used for one-way water outflow.

[0036] like Figure 2 As shown, the outlet end of the output pipe 20 is connected to the water supply pipe 19; the outlet end of the water supply pipe 19 and the inlet end of the input pipe 18 are located on one side of the equipment to facilitate the water supply and water circulation cooling of the cooling water circulation equipment 12.

[0037] like Figure 1 As shown, the bottom of the frame 11 is connected to the caster wheels 13; the caster wheels 13 facilitate the movement of the equipment.

[0038] The working principle of this utility model is as follows: the conveying roller group 14 can assist in the conveying of the plastic film, so that the plastic film is conveyed between the lower cooling roller 16 and the upper cooling roller 17 for cooling. The cooling water circulation device 12 inputs cooling water into the input pipe 18, and then flows between several lower cooling rollers 16 and several upper cooling rollers 17. The cooling water absorbs the heat of the plastic film and cools the plastic film. Then the cooling water is output from the output pipe 20, and the plastic film is cooled during the conveying process.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A cooling device for plastic film extrusion, comprising a frame (11) and a cooling water circulation device (12) disposed on one side of the frame (11), characterized in that, Also includes Conveyor roller assembly (14) and connecting rod (15) mounted on frame (11); A plurality of lower cooling rollers (16) are arranged on one side of the conveyor roller group (14) and a plurality of upper cooling rollers (17) are arranged on the top of the lower cooling rollers (16). The frame (11) is equipped with a lifting component for adjusting the lifting of the upper cooling rollers (17). The water inlet ends of the lower cooling roller (16) and the upper cooling roller (17), which are located away from the conveying roller group (14), are connected by the input pipe (18); The outlet pipe (20) connects the water outlet ends of the lower cooling roller (16) and the upper cooling roller (17) located near the conveying roller group (14); and Connecting pipe fittings are used to connect the ends of two adjacent sets of the lower cooling rollers (16) or the ends of two adjacent sets of the upper cooling rollers (17).

2. The cooling device for plastic film extrusion according to claim 1, characterized in that: The upper cooling roller (17) is rotatably connected to the lifting block (23) at its end, and the frame (11) is provided with a lifting groove (25) for the lifting block (23) to slide.

3. The cooling device for plastic film extrusion according to claim 2, characterized in that: The lifting component includes an electric telescopic rod (24) installed on the top of the frame (11), and the movable end of the bottom power output end of the electric telescopic rod (24) extends into the lifting groove (25) and connects to the top of the lifting block (23).

4. The cooling device for plastic film extrusion according to claim 1, characterized in that: The connecting pipe includes a connecting pipe (22) and a rotary joint (21) connected to both ends of the connecting pipe (22). The ends of the lower cooling roller (16) and the upper cooling roller (17) are both connected to the rotary joint (21).

5. The cooling device for plastic film extrusion according to claim 4, characterized in that: Both the input pipe (18) and the output pipe (20) include a first water pipe and a second water pipe, which are connected by a corrugated pipe. The first water pipe is connected to a rotary joint (21) corresponding to the upper cooling roller (17), and the second water pipe is connected to a rotary joint (21) corresponding to the lower cooling roller (16).

6. The cooling device for plastic film extrusion according to claim 5, characterized in that: One-way valves are installed in both the first and second water pipes.

7. The cooling device for plastic film extrusion according to claim 1, characterized in that: The outlet end of the output pipe (20) is connected to the water supply pipe (19).

8. The cooling device for plastic film extrusion according to claim 1, characterized in that: The bottom of the frame (11) is connected to a moving wheel (13).

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