Uniform cooling structure of multi-cavity injection compression molding mold

Abstract

This utility model discloses a uniform cooling structure for a multi-cavity injection molding die in the field of injection molding die technology. It includes a box body with shells symmetrically distributed on its front and rear sides. A first rotating shaft is rotatably connected between the inner walls of the left and right sides of the shell cavity. By setting up the shells, coolant enters the shell through a return pipe. The operator starts a motor, which drives the first rotating shaft to rotate. The rotation of the first rotating shaft drives multiple stirring rods on its surface to stir the coolant. The rotation of the first rotating shaft drives a second rotating shaft to rotate synchronously via a sprocket and chain. The rotation of the second rotating shaft drives a surface fan to rotate. The fan dissipates the heat absorbed by the coolant through the heat dissipation vents. This achieves rapid cooling of the coolant through the stirring rods and the fan, improving the cooling effect on the die and demonstrating strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of injection molding die technology, and in particular to a uniform cooling structure for a multi-cavity injection molding die. Background Technology

[0002] Multi-cavity injection molding dies are mainly used in thermoplastic molding or injection molding equipment to simultaneously thermo-compress or blow-mold multiple plastic products. Taking thermoplastic molding equipment as an example, multiple cavities are set in the mold. A thermoforming head presses a plastic sheet above the mold into the cavity for molding. During the molding process, the plastic sheet needs to be heated to fully stretch and shape. After the product is formed in the mold cavity, the cooling structure in the mold is used to cool each cavity, so that the thermoplastic product can be cooled and set. Then the molded product is removed from the mold for the next round of thermoplastic molding. Currently, in multi-cavity injection molding dies, the cooling structure is directly set in channels inside the mold, which pass through multiple cavities. Coolant, such as cooling oil or cooling water, is introduced into the channels to cool the multiple cavities of the mold. Because the coolant needs to pass through multiple chambers, its temperature gradually rises during the cooling process, resulting in inconsistent cooling effects between the front and rear chambers. To ensure that each chamber is adequately cooled, a longer cooling time is required, which not only reduces production efficiency and increases production costs, but also makes it easy for product quality to become unstable due to inconsistent cooling conditions.

[0003] The existing patent publication number CN220555211U discloses a uniform cooling structure for a multi-cavity injection molding die. The technical solution includes a die body and multiple injection molding cavities on the die body. Several sets of circulating cooling channels are arranged within the die body. Each set of circulating cooling channels includes a coolant inlet, a primary cooling channel, a secondary cooling channel, and a coolant outlet. The primary and secondary cooling channels of each set of circulating cooling channels pass sequentially through the outer sides of several adjacent injection molding cavities in the same order. The beneficial effect is that by setting primary and secondary cooling channels within the die body, the coolant cools several cavities through the primary cooling channels and then returns through the secondary cooling channels to cool the cavities again, thereby effectively improving the uniformity of cooling multiple cavities, increasing cooling efficiency, and improving product quality.

[0004] Existing injection molding dies require demolding after injection molding, but cooling is necessary before demolding to facilitate the process. Current cooling systems use coolant to cool the mold, but the surface temperature of the coolant rises after multiple recirculations, necessitating further cooling to ensure it remains in a consistently good cooling state. Therefore, we propose a uniform cooling structure for multi-cavity injection molding dies to address these issues. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide a uniform cooling structure for a multi-cavity injection molding die, which can solve the problem that existing injection molding dies need to be demolded after injection, but need to be cooled before demolding to facilitate demolding. Existing cooling structures use coolant to cool the die, but after multiple recirculations, the surface temperature of the coolant rises, requiring further cooling to ensure that the coolant is always in a good cooling state.

[0007] To solve the above technical problems, this utility model provides a uniform cooling structure for a multi-cavity injection molding die, adopting the following technical solution: it includes a box body, on which shells are symmetrically distributed on the front and rear sides. A first rotating shaft is rotatably connected between the inner walls of the left and right sides of the inner cavity of the shells. Multiple stirring rods are fixedly installed on the surface of the first rotating shaft. A second rotating shaft is rotatably connected between the inner walls of the left and right sides of the inner cavity of the shells. Multiple fans are fixedly installed on the surface of the second rotating shaft, and the second rotating shaft is located directly above the first rotating shaft.

[0008] Optionally, a heat dissipation vent is provided on the left side of the housing, and the heat dissipation vent is located on the left side of the second rotating shaft.

[0009] Optionally, the right ends of both the first and second rotating shafts penetrate the right side of the housing, and sprockets are fixedly installed on the right ends of both the first and second rotating shafts, with a chain between the two sprockets.

[0010] Optionally, a motor is fixedly installed on the left side of the housing, and the output end of the motor is fixedly connected to the left end of the first rotating shaft.

[0011] Optionally, the inner cavity of the box is provided with multiple mold slots, and each mold slot is fitted with a heat-conducting shell.

[0012] Optionally, a heat dissipation channel is provided between the multiple mold slots, and an infusion pipe and a return pipe are fixedly connected to the left and right ends of the heat dissipation channel, respectively.

[0013] Optionally, the ends of the infusion tube and the return tube away from the box are fixedly connected to the left and right sides of the shell, and a pump is fixedly installed on the right side of the shell, and the pump is fixedly installed on the surface of the return tube.

[0014] In summary, this utility model has at least one of the following beneficial effects: 1. By setting up a shell, after the coolant enters the shell through the return pipe, the operator starts the motor, which drives the first rotating shaft to rotate. The rotation of the first rotating shaft drives multiple stirring rods on the surface to stir the coolant. The rotation of the first rotating shaft drives the second rotating shaft to rotate synchronously through the sprocket and chain. The rotation of the second rotating shaft drives the surface fan to rotate. The fan rotates and discharges the heat absorbed by the coolant through the heat dissipation port. This achieves the goal of accelerating the heat dissipation efficiency of the coolant through the stirring rods and dissipating heat through the fan, realizing rapid cooling of the coolant and improving the cooling effect on the mold. It is highly practical.

[0015] 2. By setting a mold groove and installing a heat-conducting shell inside the mold groove, after the mold is pressed, the surface heat is diffused through the heat-conducting shell to the coolant inside the heat dissipation channel. The coolant is circulated through the inlet pipe, return pipe and pump. The operation is simple and the mold can be cooled quickly. It is highly practical. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the internal structure of the box body of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the interior of the casing of this utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged diagram of point A in the middle.

[0021] Explanation of reference numerals in the attached drawings: 1. Box body; 2. Shell; 3. First rotating shaft; 4. Stirring rod; 5. Second rotating shaft; 6. Fan; 7. Heat dissipation vent; 8. Sprocket; 9. Chain; 10. Motor; 11. Mold groove; 12. Heat-conducting shell; 13. Heat dissipation channel; 14. Infusion pipe; 15. Return pipe; 16. Pump. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0023] Example 1, refer to Figure 1-4 In this embodiment, to address the issue that existing injection molding dies require demolding after injection molding, but cooling is necessary before demolding to facilitate demolding, the existing cooling structure uses coolant to cool the mold. However, after multiple recirculations, the surface temperature of the coolant rises, requiring further cooling to ensure it remains in a good cooling state. Therefore, this invention discloses a uniform cooling structure for multi-cavity injection molding dies.

[0024] The device includes a box body 1, with shells 2 symmetrically distributed on the front and rear sides of the box body 1. A first rotating shaft 3 is rotatably connected between the inner walls of the left and right sides of the inner cavity of the shell 2. Multiple stirring rods 4 are fixedly installed on the surface of the first rotating shaft 3. A second rotating shaft 5 is rotatably connected between the inner walls of the left and right sides of the inner cavity of the shell 2. Multiple fans 6 are fixedly installed on the surface of the second rotating shaft 5, which is located directly above the first rotating shaft 3.

[0025] A heat dissipation vent 7 is provided on the left side of the housing 2, and the heat dissipation vent 7 is located on the left side of the second rotating shaft 5.

[0026] The right ends of the first shaft 3 and the second shaft 5 both penetrate the right side of the housing 2, and sprockets 8 are fixedly installed on the right ends of the first shaft 3 and the second shaft 5, with a chain 9 between the two sprockets 8.

[0027] A motor 10 is fixedly installed on the left side of the housing 2, and the output end of the motor 10 is fixedly connected to the left end of the first rotating shaft 3.

[0028] The inner cavity of the box body 1 has multiple mold slots 11, and each mold slot 11 is fitted with a heat-conducting shell 12.

[0029] A heat dissipation channel 13 is provided between multiple mold slots 11, and an infusion pipe 14 and a return pipe 15 are fixedly connected to the left and right ends of the heat dissipation channel 13, respectively.

[0030] The ends of the infusion tube 14 and the return tube 15 away from the box body 1 are fixedly connected to the left and right sides of the shell 2. A pump 16 is fixedly installed on the right side of the shell 2, and the pump 16 is fixedly installed on the surface of the return tube 15.

[0031] The specific working principle is as follows: By setting a mold groove 11 and installing a heat-conducting shell 12 inside the mold groove 11, after the mold is pressed, the surface heat is diffused through the heat-conducting shell 12 to the coolant inside the heat dissipation channel 13. The coolant is circulated through the inlet pipe 14, return pipe 15 and pump 16. After the coolant enters the shell 2 through the return pipe 15, the operator starts the motor 10. The motor 10 drives the first rotating shaft 3 to rotate. The rotation of the first rotating shaft 3 drives multiple stirring rods 4 on the surface to stir the coolant. The rotation of the first rotating shaft 3 drives the second rotating shaft 5 to rotate synchronously through the sprocket 8 and chain 9. The rotation of the second rotating shaft 5 drives the surface fan 6 to rotate. The rotation of the fan 6 discharges the heat absorbed by the coolant through the heat dissipation port 7. This achieves the goal of accelerating the heat dissipation efficiency of the coolant through the stirring rods 4 and dissipating heat through the fan 6, thus realizing the rapid cooling of the coolant and improving the cooling effect on the mold.

[0032] The wiring diagram of the motor in this utility model is common knowledge in the field, and its working principle is a well-known technology. The appropriate model is selected according to actual use, so the control method and wiring layout of the motor will not be explained in detail.

[0033] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A uniform cooling structure for a multi-cavity injection molding die, comprising a housing (1), characterized in that: The box (1) has shells (2) symmetrically distributed on the front and back sides. A first rotating shaft (3) is rotatably connected between the inner walls of the left and right sides of the inner cavity of the shell (2). Multiple stirring rods (4) are fixedly installed on the surface of the first rotating shaft (3). A second rotating shaft (5) is rotatably connected between the inner walls of the left and right sides of the inner cavity of the shell (2). Multiple fans (6) are fixedly installed on the surface of the second rotating shaft (5). The second rotating shaft (5) is located directly above the first rotating shaft (3).

2. The uniform cooling structure of a multi-cavity injection molding die according to claim 1, characterized in that: The housing (2) has a heat dissipation port (7) on the left side, and the heat dissipation port (7) is located on the left side of the second rotating shaft (5).

3. The uniform cooling structure of a multi-cavity injection molding die according to claim 1, characterized in that: The right ends of the first shaft (3) and the second shaft (5) both penetrate the right side of the housing (2), and the right ends of the first shaft (3) and the second shaft (5) are both fixedly mounted with sprockets (8), and a chain (9) is provided between the two sprockets (8).

4. The uniform cooling structure of a multi-cavity injection molding die according to claim 1, characterized in that: A motor (10) is fixedly installed on the left side of the housing (2), and the output end of the motor (10) is fixedly connected to the left end of the first rotating shaft (3).

5. The uniform cooling structure of a multi-cavity injection molding die according to claim 1, characterized in that: The inner cavity of the box (1) is provided with multiple mold slots (11), and each mold slot (11) is fitted with a heat-conducting shell (12).

6. The uniform cooling structure of a multi-cavity injection molding die according to claim 5, characterized in that: A heat dissipation channel (13) is provided between the multiple mold slots (11), and the left and right ends of the heat dissipation channel (13) are respectively fixedly connected to an infusion pipe (14) and a return pipe (15).

7. The uniform cooling structure of a multi-cavity injection molding die according to claim 6, characterized in that: The infusion tube (14) and the return tube (15) are both fixedly connected to the left and right sides of the housing (2) at the ends away from the box body (1). A pump (16) is fixedly installed on the right side of the housing (2), and the pump (16) is fixedly installed on the surface of the return tube (15).

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