Injection mold with cooling function

Abstract

The utility model discloses an injection mold with cooling function relates to injection mold technical field, including upper die holder, the bottom surface of upper die holder is provided with lower die holder, the top surface embedding of lower die holder is installed with lower mould, the bottom surface fixedly connected with the backing pad of lower die holder, the end surface of backing pad also has cooling cavity and is opened in the penetration, the utility model discloses the air pipe of sealing plate outer wall fixed communication is divided into gas inlet end and gas outlet end for the low temperature cooling gas of going in, through the fixed link of multiple heat exchange copper column of cooling cavity inner wall, its top end is linked with lower mould bottom surface through heat conduction copper column, and copper material quality possesses excellent heat conductivity, can fast melt plastic transmission's heat conduction of lower mould top to cooling cavity, and cooperate the multiple heat exchange sheet of heat exchange copper column outer wall fixed sleeve joint, can greatly increase the contact area of heat exchange copper column and cooling gas, and strengthen the heat exchange efficiency between gas and copper column, accelerate heat loss.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold with a cooling function. Background Technology

[0002] Injection molding is one of the most widely used molding processes in the plastics processing industry. With its advantages such as high molding efficiency, stable plastic parts dimensions, and the ability to be mass-produced, it is widely used in many fields such as automotive parts and home appliances. As the requirements for the precision, surface quality, and production efficiency of plastic parts continue to increase, the performance of injection molds has become the core factor restricting the quality of plastic parts and production efficiency. In the injection molding process, after the molten plastic is injected into the mold cavity under high pressure, it needs to be cooled quickly and evenly to remove the heat, so that the melt gradually solidifies and sets.

[0003] However, in existing technologies, traditional injection mold cooling structures mostly adopt a single water cooling mode. The distance between the water channel and the cavity surface is difficult to control precisely. If the distance is too far, the heat exchange efficiency is low and the cooling cycle is long; if the distance is too close, it can easily lead to a decrease in the local strength of the mold and even the risk of water leakage. Some cooling designs for the lower mold rely solely on the heat conduction of the mold steel itself, which has a slow heat conduction rate and further prolongs the molding cycle. Utility Model Content

[0004] The purpose of this invention is to address the problems in existing technologies that often employ a single water-cooling mode, making it difficult to precisely control the distance between the water channel and the cavity surface. Too large a distance results in low heat exchange efficiency and a long cooling cycle; too small a distance can lead to a decrease in local mold strength and even the risk of leakage. Some cooling designs for the lower mold rely solely on the heat conduction of the mold steel itself, resulting in a slow heat transfer rate and further extending the molding cycle. Therefore, this invention proposes an injection mold with a cooling function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an injection mold with a cooling function, comprising an upper mold base, a lower mold base disposed on the bottom surface of the upper mold base, a lower mold embedded in the top surface of the lower mold base, a pad fixedly connected to the bottom surface of the lower mold base, a cooling cavity extending through the end face of the pad, sealing plates fixedly connected to both ends of the inner wall of the cooling cavity, a vent pipe fixedly connected to the outer wall of the sealing plate, a plurality of heat exchange copper pillars fixedly connected to the inner wall of the cooling cavity, a heat conduction copper pillar extending through the bottom surface of the lower mold base, the top end of the heat conduction copper pillar inserted into the bottom surface of the lower mold, the bottom end of the heat conduction copper pillar fixedly connected to the top surface of the heat exchange copper pillar, and a plurality of heat exchange plates fixedly sleeved on the outer wall of the heat exchange copper pillar.

[0006] Preferably, a top plate is fixedly connected to the top surface of the upper mold base, and an injection port is connected through the center of the top surface of the top plate.

[0007] Preferably, the side wall of the upper mold base is provided with a connection port, and the inner wall of the upper mold base is provided with a cooling channel, the interior of the cooling channel being in communication with the interior of the connection port.

[0008] Preferably, the outer wall of the lower mold base is provided with a second connection port, and the inner wall of the lower mold base is provided with a second cooling channel, and the second cooling channel is fixedly connected to the second connection port.

[0009] Preferably, the second cooling channel is located below the lower mold.

[0010] Preferably, the bottom surface of the upper mold base is equipped with an upper mold corresponding to the lower mold.

[0011] Preferably, a base plate is fixedly connected to the bottom surface of the pad.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the vent pipe, which is fixedly connected to the outer wall of the sealing plate, is divided into an inlet end and an outlet end for introducing low-temperature cooling gas. Multiple heat exchange copper pillars are fixedly connected to the inner wall of the cooling chamber, and their top ends are connected to the bottom surface of the lower mold through heat-conducting copper pillars. Copper has excellent thermal conductivity, which can quickly conduct the heat transferred from the molten plastic on the lower mold to the cooling chamber. With the multiple heat exchange plates fixedly sleeved on the outer wall of the heat exchange copper pillars, the contact area between the heat exchange copper pillars and the cooling gas can be greatly increased, the heat exchange efficiency between the gas and the copper pillars can be enhanced, and the heat dissipation can be accelerated.

[0014] 2. In this utility model, the upper and lower molds are simultaneously water-cooled through cooling channel one and cooling channel two, realizing a dual cooling mode of air cooling and water cooling. Compared with a single cooling method, the molding cycle is effectively shortened. Under the continuous action of coolant and cooling gas, the cavity temperature drops rapidly and evenly, the molten plastic gradually solidifies, and finally forms a plastic part with accurate dimensions and good surface quality. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of an injection mold with a cooling function is provided for this utility model;

[0016] Figure 2 An exploded view of the structure of an injection mold with cooling function is provided for this utility model;

[0017] Figure 3 This utility model provides a schematic diagram of the internal structure of the upper mold base of an injection mold with a cooling function;

[0018] Figure 4 This utility model provides a schematic diagram of the internal structure of the lower mold base of an injection mold with a cooling function;

[0019] Figure 5 This utility model presents a schematic diagram of the internal structure of an injection mold pad with a cooling function.

[0020] Legend: 1. Upper mold base; 11. Connection port one; 12. Cooling channel one; 2. Lower mold base; 21. Connection port two; 22. Lower mold; 23. Cooling channel two; 24. Heat-conducting copper pillar; 3. Pad plate; 31. Cooling cavity; 32. Sealing plate; 33. Vent pipe; 34. Heat exchange copper pillar; 35. Heat exchange plate; 4. Base plate; 5. Top plate; 51. Injection port. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 - Figure 5 As shown, this utility model provides an injection mold with a cooling function, including an upper mold base 1, a lower mold base 2 on the bottom surface of the upper mold base 1, a lower mold 22 embedded in the top surface of the lower mold base 2, a pad 3 fixedly connected to the bottom surface of the lower mold base 2, a cooling cavity 31 through the end face of the pad 3, a sealing plate 32 fixedly connected to both ends of the inner wall of the cooling cavity 31, a vent pipe 33 fixedly connected to the outer wall of the sealing plate 32, a plurality of heat exchange copper pillars 34 fixedly connected to the inner wall of the cooling cavity 31, a heat conduction copper pillar 24 through the bottom surface of the lower mold base 2, the top end of the heat conduction copper pillar 24 inserted into the bottom surface of the lower mold 22, the bottom end of the heat conduction copper pillar 24 fixedly connected to the top surface of the heat exchange copper pillar 34, and a plurality of heat exchange plates 35 fixedly sleeved on the outer wall of the heat exchange copper pillar 34.

[0024] The specific settings and functions of this embodiment are described in detail below. The pad 3 serves as a support component for the lower mold base 2, and the cooling cavity 31 through its end face provides a closed heat exchange space for air cooling. The sealing plate 32 is fixed at both ends of the inner wall of the cooling cavity 31 to prevent leakage of cooling gas and ensure the sealing of the heat exchange cavity. The vent pipe 33 fixedly connected to the outer wall of the sealing plate 32 is divided into an inlet end and an outlet end. The inlet end is used to introduce low-temperature cooling gas, and the outlet end is used to discharge high-temperature gas after heat absorption, so as to realize the circulation of gas. Multiple heat exchange copper pillars 34 are fixedly connected to the inner wall of the cooling cavity 31. The top of their top ends are connected to the bottom surface of the lower mold 22 through heat-conducting copper pillars 24. Copper has excellent thermal conductivity and can quickly conduct the heat transferred by the molten plastic on the lower mold 22 to the cooling cavity 31. With the multiple heat exchange plates 35 fixedly sleeved on the outer wall of the heat exchange copper pillars 34, the contact area between the heat exchange copper pillars 34 and the cooling gas can be greatly increased, the heat exchange efficiency between the gas and the copper pillars can be enhanced, and the heat dissipation can be accelerated.

[0025] Example 2: Figure 1 - Figure 5 As shown, a top plate 5 is fixedly connected to the top surface of the upper mold base 1, and an injection port 51 is connected through the center of the top surface of the top plate 5. A connection port 11 is opened on the side wall of the upper mold base 1, and a cooling channel 12 is opened on the inner wall of the upper mold base 1. The interior of the cooling channel 12 is connected to the interior of the connection port 11. A connection port 21 is opened on the outer wall of the lower mold base 2, and a cooling channel 23 is opened on the inner wall of the lower mold base 2. The cooling channel 23 is fixedly connected to the connection port 21. The cooling channel 23 is located below the lower mold 22. An upper mold corresponding to the lower mold 22 is installed on the bottom surface of the upper mold base 1, and a bottom plate 4 is fixedly connected to the bottom surface of the pad plate 3.

[0026] The overall effect of this embodiment is that the top plate 5 reinforces the upper mold base 1, and the injection port 51 penetrating through the center of its top surface is the channel for injecting molten plastic into the mold cavity, ensuring accurate plastic filling. The connection port 11 on the side wall of the upper mold base 1 is connected to the cooling channel 12 on the inner wall. The connection port 11 is used to connect to the external coolant pipeline. The cooling channel 12 is distributed around the upper mold and can water-cool the upper mold side cavity after injection. The connection port 21 on the outer wall of the lower mold base 2 is connected to the cooling channel 23 on the inner wall. The cooling channel 23 is located below the lower mold 22 and can water-cool the lower mold side cavity in a targeted manner. Together with the cooling channel 12 of the upper mold, the upper and lower molds are cooled synchronously.

[0027] The device's operation and working principle are as follows: After molten plastic is injected into the mold cavity, it releases a large amount of heat. The heat from the upper mold is directly transferred to the coolant in the cooling channel 12. The heat from the lower mold 22 is transferred to the heat exchange copper column 34 through the heat-conducting copper column 24, and diffused into the cooling chamber 31 through the heat exchange plate 35. During the heat dissipation stage, the coolant in the cooling channel 12 and the cooling channel 23 absorbs heat and is then circulated out through the external pipeline, achieving water-cooled heat exchange. The low-temperature gas in the cooling chamber 31 comes into contact with the heat exchange plate 35, absorbs heat, and is then discharged through the vent pipe 33, achieving air-cooled heat exchange. During the shaping stage, under the continuous action of the coolant and cooling gas, the temperature of the mold cavity drops rapidly and uniformly, the molten plastic gradually solidifies, and finally forms a plastic part with accurate dimensions and good surface quality.

[0028] 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. An injection mold with a cooling function, comprising an upper mold base (1), characterized in that: The bottom surface of the upper mold base (1) is provided with a lower mold base (2). The top surface of the lower mold base (2) is embedded with a lower mold (22). The bottom surface of the lower mold base (2) is fixedly connected with a pad (3). The end face of the pad (3) is also provided with a cooling cavity (31). Both ends of the inner wall of the cooling cavity (31) are fixedly connected with sealing plates (32). The outer wall of the sealing plate (32) is fixedly connected with a vent pipe (33). The inner wall of the cooling cavity (31) is fixedly connected with multiple heat exchange copper pillars (34). The bottom surface of the lower mold base (2) is connected with a heat conduction copper pillar (24). The top end of the heat conduction copper pillar (24) is inserted into the bottom surface of the lower mold (22). The bottom end of the heat conduction copper pillar (24) is fixedly connected to the top surface of the heat exchange copper pillar (34). The outer wall of the heat exchange copper pillar (34) is fixedly sleeved with multiple heat exchange plates (35).

2. The injection mold with cooling function according to claim 1, characterized in that: The top surface of the upper mold base (1) is fixedly connected to a top plate (5), and an injection port (51) is connected through the center of the top surface of the top plate (5).

3. The injection mold with cooling function according to claim 1, characterized in that: The upper mold base (1) has a connection port (11) on its side wall and a cooling channel (12) on its inner wall. The interior of the cooling channel (12) is connected to the interior of the connection port (11).

4. The injection mold with cooling function according to claim 1, characterized in that: The outer wall of the lower mold base (2) is provided with a connection port two (21), and the inner wall of the lower mold base (2) is provided with a cooling channel two (23). The cooling channel two (23) is fixedly connected to the connection port two (21).

5. An injection mold with a cooling function according to claim 4, characterized in that: The second cooling channel (23) is located below the lower mold (22).

6. The injection mold with cooling function according to claim 1, characterized in that: The bottom surface of the upper mold base (1) is equipped with an upper mold corresponding to the lower mold (22).

7. An injection mold with cooling function according to claim 1, characterized in that: The bottom surface of the pad (3) is fixedly connected to the base plate (4).

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