Injection mold cooling runner convenient to machine

Abstract

The utility model relates to an injection mold cooling runner convenient to machine, and belongs to the technical field of injection mold manufacturing. The injection mold cooling runner convenient to machine comprises step grooves, cooling pipes and heat conductors, a plurality of mutually communicated step grooves are formed in the inner side of a male mold along with the molded surface of the male mold, tool withdrawal openings are formed in the side faces of the step grooves, and each layer of step surface of each step groove is parallel to an XY plane; the cooling pipe is bent along with the molded surface of the male die and then erected in the step groove, and the heat conductor abuts against the position between the step groove and the cooling pipe. The technical problems that in the prior art, a conformal cooling flow channel is low in machining efficiency, high in machining cost, not universal and difficult to popularize can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection mold manufacturing, and particularly relates to an injection mold cooling channel which is easy to process. Background Art

[0002] In the field of molds, especially the working surface of injection molds is usually at high temperature. In order to quickly shape the injection molded parts, it is usually necessary to add cooling channels and other heat dissipation structures to the molds. However, for molds manufactured by traditional processes, the cooling channels are relatively simple, and most of them are processed by direct drilling. For molds such as long-tube lead gloves, deep hole drilling is required to process the cooling channels. The processing efficiency is low, and it is impossible to achieve a conformal design. This causes problems such as weak heat dissipation performance and uneven heat dissipation on the working surface of the mold, and will cause defects such as product shrinkage, which seriously affects product performance.

[0003] The existing patent with publication number CN116956507A discloses a cooling channel automatic generation system and method, equipment, storage medium, and cloud platform, which belongs to the field of cooling channels of molds. The cooling channel automatic generation system includes: a mold model acquisition module, a cooling channel design space generation module, a cooling channel preset line input module, a cooling channel characteristic parameter setting module, a cooling channel main line generation module, and a cooling channel generation module; a cooling channel automatic generation system and method, which automatically generates cooling channels that meet the constraint size range in the cooling channel design space by extracting mold characteristic parameters.

[0004] The prior art has the following problems:

[0005] The cooling channels designed to conform to the working surface have complex structures and cannot be obtained through traditional subtractive processing methods. However, additive processing has low processing efficiency and high processing costs, and is not popular and difficult to promote. Utility Model Content

[0006] The utility model provides an injection mold cooling channel which is easy to process, and can solve the technical problems in the prior art that the cooling channel with conformal design has low processing efficiency, high processing cost, and is not popular and difficult to promote.

[0007] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0008] The present application provides an injection mold cooling channel that is easy to process, which includes a step groove, a cooling pipe and a heat conductor. A plurality of mutually connected step grooves are opened on the inner side of the punch along the profile of the punch, the side of the step groove has a retreat edge, and each step surface of the step groove is parallel to the XY plane. The cooling pipe is bent along the profile of the punch and then erected in the step groove, and the heat conductor abuts between the step groove and the cooling pipe.

[0009] Through the above technical solution, the use of step grooves reduces the demand for processing equipment and saves processing time. The separately assembled cooling pipes can be pre-bent into complex shapes according to the mold. The thermal conductivity between the punch and the cooling pipe is increased by the heat conductor to ensure cooling performance, thereby reducing the processing difficulty of the cooling channel of the injection mold.

[0010] In the utility model, the above-mentioned cooling channel also includes a closing plate, a pressure plate and a pressure piece. The closing plate is inserted into the retreat edge, and the pressure plate is pressed against the heat conductor. The pressure plate, the step groove and the closing plate form a closed space. The pressure piece is connected to the closing plate and applies pressure to the closed space to make the heat conductor and the cooling tube in close contact.

[0011] Through the above technical solution, after a closed space is formed by the closing plate, the pressure plate and the step groove, the closed space is pressurized by the pressure piece to compact the heat conductor, further improving the heat transfer efficiency of the heat conductor and improving the cooling effect.

[0012] In the present invention, the cooling channel further comprises a heat sink, and a plurality of heat sinks are connected to an end of the pressing plate facing away from the heat conductor.

[0013] Through the above technical solution, the heat sink is used to quickly conduct away the residual heat in the heat conductor, thereby further improving the cooling effect of the cooling channel.

[0014] In the present invention, the cooling channel further comprises a heat storage layer, and the heat storage layer is arranged around the heat dissipation plate.

[0015] Through the above technical solution, the heat storage layer is used to temporarily store the heat conducted by the heat conductor, which is used to release heat to the punch during secondary injection molding to avoid the punch temperature being too low and reducing the fluidity of the material on the punch surface, thereby improving the product yield.

[0016] In the present invention, the heat storage layer is a paraffin layer.

[0017] Through the above technical solution, the heat storage layer adopts a paraffin layer, which has better assembly performance and a larger heat capacity ratio, thereby improving the convenience of assembly.

[0018] In the present invention, the heat conductor is a heat conductive paste.

[0019] Through the above technical solution, the heat conductor adopts thermal conductive paste, which improves the plasticity of the heat conductor and the fit with the cooling pipe, avoids the generation of gaps, and improves the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 Axonometric view of the punch provided for the embodiment of the utility model;

[0022] Figure 2 A cross-sectional view of a cooling channel of an injection mold that is easy to process provided by an embodiment of the utility model;

[0023] Figure 3 An exploded view of a punch provided in an embodiment of the utility model.

[0024] Icons: 1-punch; 2-step groove; 3-cooling pipe; 4-heat conductor; 5-pressure plate; 501-heat dissipation plate; 6-heat storage layer; 7-sealing plate; 8-pressure piece; 9-tube plate. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be welding, bolt connection, or riveting; it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Example:

[0030] Please refer to Figure 1-Figure 3 , Figure 1-Figure 3 An embodiment of the present application is shown.

[0031] This embodiment provides an injection mold cooling channel that is easy to process. Figure 3 As shown, it includes a step groove 2, a cooling pipe 3 and a heat conductor 4. A plurality of interconnected step grooves 2 are opened on the inner side of the punch 1 along the profile of the punch 1. The side of the step groove 2 has a retreat edge. Each step surface of the step groove 2 is parallel to the XY plane. The cooling pipe 3 is bent along the profile of the punch 1 and is erected in the step groove 2. The heat conductor 4 is abutted between the step groove 2 and the cooling pipe 3.

[0032] During manufacturing, a three-axis machine tool is used to mill the cross-sections such as Figure 2 The step groove 2 shown in the figure only needs a machine tool with two-axis linkage for processing because each step plane is parallel to the XY plane, which reduces the demand for the machine tool for the cooling channel. The step height is simulated by the programming software to simulate the tool path and retain the distribution plan of the minimum safe distance between the root of the step and the surface, and then it is processed layer by layer. At the same time, a seamless stainless steel pipe is bent and welded into a shape that follows the shape of the punch 1 and then placed in the step groove 2 as a cooling pipe 3. Finally, the heat conductor 4 is filled to compact it with the cooling pipe 3 and the step groove 2.

[0033] It should be noted that if Figure 2 As shown, the step groove 2 will increase the contact surface between the punch 1 and the heat conductor 4 on the basis of the same profile, thereby increasing the cooling effect. The heat conductor 4 is filled and discharges the gas between the cooling pipe 3 and the step groove 2, and obtains good thermal conductivity. If necessary, ultrasonic vibration can be used to further discharge the gas in the heat conductor 4.

[0034] Through the above technical solution, the step groove 2 is used to reduce the demand for processing equipment and save processing time. Then, the separately assembled cooling tube 3 can be pre-bent into a complex shape according to the mold. Then, the thermal conductivity between the punch 1 and the cooling tube 3 is improved by the heat conductor 4 to ensure the cooling performance, thereby reducing the processing difficulty of the cooling channel of the injection mold.

[0035] As a preferred implementation method, Figure 1 and Figure 3 As shown, the cooling channel further includes a closing plate 7, a pressure plate 5 and a pressure member 8. The closing plate 7 is inserted into the retreating edge, the pressure plate 5 is pressed against the heat conductor 4, the pressure plate 5, the step groove 2 and the closing plate 7 form a closed space, and the pressure member 8 is threadedly connected to the closing plate 7 and applies pressure to the closed space to make the heat conductor 4 and the cooling tube 3 in close contact.

[0036] When manufacturing, Figure 3 As shown, the pressure plate 5 is made of a triangular groove formed by bending and welding multiple steel plates and a thin steel plate, and is connected to the inner side of the punch 1 with a countersunk screw, and the pressure piece 8 uses a fine-thread screw. After the assembly is completed, the heat conductor 4 in the closed space is squeezed by continuously screwing in the pressure piece 8 to further compact it. If necessary, thread glue is used to tighten the pressure piece 8.

[0037] It should be noted that if Figure 3 As shown, the input and output ends of the cooling tube 3 are connected to the punch 1 through a tube-penetrating plate 9 having a structure similar to that of the closing plate 7, so as to improve the sealing performance of the insertion position of the cooling tube 3.

[0038] Through the above technical solution, after the closing plate 7 and the pressure plate 5 are used to form a closed space with the step groove 2, the pressure member 8 pressurizes the closed space to compact the heat conductor 4, further improving the heat transfer efficiency of the heat conductor 4 and improving the cooling effect.

[0039] As a preferred implementation method, Figure 2 and Figure 3 As shown, the cooling channel further includes a heat sink 501 , and a plurality of heat sinks 501 are welded to an end of the pressing plate 5 facing away from the heat conductor 4 .

[0040] When in use, after the heated rubber is injected into the punch 1, the heat of the rubber is absorbed and transferred to the heat conductor 4, and then part of the heat is taken out of the mold through the medium circulating in the cooling tube 3, and part of the heat will continue to be transferred to the inside of the punch 1, and the internal space of the punch 1 will be heated up through the heat sink 501. After the cooled and formed lead gloves are removed, the cooling tube 3 stops circulating, and the heat in the internal space of the punch 1 diffuses outward, causing the surface temperature of the punch 1 to rise, thereby reducing the temperature difference between the punch 1 and the rubber during the secondary injection molding.

[0041] Through the above technical solution, the heat sink 501 is used to quickly conduct away the residual heat in the heat conductor 4, thereby further improving the cooling effect of the cooling channel.

[0042] As a preferred implementation method, Figure 2 As shown, the cooling channel further includes a heat storage layer 6 , which is arranged around the heat dissipation plate 501 .

[0043] When in use, a material with a heat capacity ratio greater than that of air is used as the heat storage layer 6 to further improve the heat storage capacity.

[0044] Through the above technical solution, the heat storage layer 6 is used to temporarily store the heat conducted by the heat conductor 4, which is used to release heat to the punch 1 during secondary injection molding to avoid the punch 1 temperature being too low and reducing the fluidity of the material on the surface of the punch 1, thereby improving the product yield.

[0045] As a preferred embodiment, the heat storage layer 6 is a paraffin layer.

[0046] When in use, when the heat storage layer 6 is made of paraffin, the paraffin, which is solid at room temperature, can be better processed into a specified size and assembled.

[0047] Through the above technical solution, the heat storage layer 6 adopts a paraffin layer, which has better assembly performance and a larger heat capacity ratio, thereby improving the convenience of assembly.

[0048] As a preferred implementation, the heat conductor 4 is a heat-conducting paste.

[0049] When in use, exemplary: the thermal conductive paste adopts a flexible thermal conductive material with application number 201811176755.1.

[0050] Through the above technical solution, the heat conductor 4 adopts heat-conducting paste, which improves the plasticity of the heat conductor 4 and the fit with the cooling pipe 3, avoids the generation of gaps, and improves the cooling effect.

[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A cooling channel for an injection mold that is easy to process, characterized in that: include: A plurality of mutually connected step grooves (2) are formed on the inner side of the punch (1) along the molding surface of the punch (1), the side surface of the step groove (2) has a knife edge, and each step surface of the step groove (2) is parallel to the XY plane; A cooling pipe (3) is installed in the step groove (2) after being bent along with the profile of the punch (1); The heat conductor (4) is in contact between the step groove (2) and the cooling pipe (3).

2. The easy-to-process injection mold cooling channel according to claim 1, characterized in that: Also includes: A closing plate (7) is inserted into the knife retreating edge; A pressing plate (5) is pressed against the heat conductor (4), wherein the pressing plate (5), the step groove (2) and the closing plate (7) form a closed space; A pressure member (8) is connected to the closing plate (7) and applies pressure to the closed space so that the heat conductor (4) and the cooling pipe (3) are in close contact.

3. The easy-to-process injection mold cooling channel according to claim 2, characterized in that: Also includes: A plurality of heat dissipation plates (501) are connected to one end of the pressure plate (5) facing away from the heat conductor (4).

4. The easy-to-process injection mold cooling channel according to claim 3, characterized in that: Also includes: The heat storage layer (6) is arranged around the heat dissipation plate (501).

5. The easy-to-process injection mold cooling channel according to claim 4, characterized in that: The heat storage layer (6) is a paraffin layer.

6. The easy-to-process injection mold cooling channel according to claim 1, characterized in that: The heat conductor (4) is heat-conducting cement.

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