Front frame injection mold and injection equipment

Abstract

This application provides an injection mold for a front frame and an injection molding device. The injection mold for the front frame includes a mold base and a core. The core is connected to one side of the mold base to form a venting gap. The side of the core away from the mold base and the side of the mold base near the core together form an inner molding surface. The inner molding surface is used to mold the inner surface of the front frame, and the venting gap communicates with the inner molding surface. The mold base has at least one venting channel, which communicates with the venting gap. The injection mold for the front frame effectively improves the appearance of the front frame, reducing flash or burrs, thereby increasing the surface appearance yield of the front frame.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to an injection mold for a front frame and an injection molding equipment. Background Technology

[0002] Venting of injection molds is a crucial aspect of mold design, directly impacting product quality and production efficiency. There are generally two methods for venting injection molds: one is to create venting holes to expel gas from the gaps. However, the machining of venting holes is complex, and their lifespan is short, resulting in higher mold costs. This method is often used for injection molding of complex, high-precision parts. The other method is to vent gas through the natural fit gaps of the mold. This method is convenient for maintenance and can significantly reduce mold costs. This method is often used for injection molding of parts with regular shapes and appearances.

[0003] For example, in the utility model patent application with application number CN201821744027.1, the appearance part uses the gap formed when the front mold and the rear mold are closed to achieve venting. However, for the molding of the front frame of the product, in order to ensure the surface appearance of the front frame, the outer side of the front frame is generally completely molded in one of the front mold and the rear mold. For example, in the utility model patent application with application number CN 201822114201.0, the gap between the front mold and the rear mold is used for venting, but this will cause flash or burrs on the appearance surface of the front frame, affecting the surface appearance qualification rate of the front frame. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an injection mold and injection equipment for a front frame that can effectively improve the appearance of the front frame by removing burrs or flash, thereby improving the surface appearance qualification rate of the front frame.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An injection mold for a front frame includes a mold base and a core. The core is connected to one side of the mold base to form a venting gap, and the side of the core away from the mold base and the side of the mold base near the core together form an inner molding surface. The inner molding surface is used to mold the inner surface of the front frame, and the venting gap is connected to the inner molding surface.

[0007] The mold base is provided with at least one exhaust channel, which is connected to the exhaust gap.

[0008] In one embodiment, the width of the venting gap at the end near the inner forming surface is 45μm to 55μm.

[0009] In one embodiment, the mold base has a relief groove on one side near the core, the core is disposed in the relief groove and is disposed opposite to the groove wall of the relief groove to form the venting gap, and the bottom of the relief groove has at least one venting channel.

[0010] In one embodiment, the wall of the clearance groove is a wedge-shaped surface, the wedge-shaped surface is disposed away from the bottom of the clearance groove, and the peripheral wall of the core is disposed opposite to the wedge-shaped surface to form the exhaust gap.

[0011] In one embodiment, the venting gap communicates with the lowest point of the inner molded surface in the direction of gravity of the formed front frame.

[0012] In one embodiment, the gap width at the end of the venting gap away from the inner molding surface is greater than the gap width at the end of the venting gap close to the inner molding surface.

[0013] In one embodiment, the injection mold for the front frame further includes at least one ejector pin, which passes through the core and is slidably disposed on the core in a direction close to or away from the inner molding surface. The ejector pin, the side of the core away from the mold base, and the side of the mold base close to the core together form the inner molding surface. The ejector pin is positioned away from the mold base.

[0014] In one embodiment, the ejector pin is positioned away from the mold base via the venting channel.

[0015] In one embodiment, the injection mold for the front frame further includes a mold clamping base, which forms an outer molding surface when the mold clamping base and the mold base are closed. The outer molding surface and the inner molding surface together form a molding cavity, which is used to mold the front frame, and the inner molding surface molds the inner surface of the front frame.

[0016] An injection molding machine includes a work frame and an injection mold for a front frame as described in any of the above embodiments, wherein the mold base is disposed on the work frame.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] The front frame injection mold of this utility model has a core connected to one side of the mold base to form an venting gap. The venting channel is connected to the venting gap. Together with the side of the core away from the mold base and the side of the mold base close to the core, they form an inner forming surface. That is, the venting gap is used to communicate with the inner forming surface, so that the gas located at the inner forming surface during injection is discharged through the venting gap. Combined with the venting channel, the gas vented from the inner forming surface during injection is effectively discharged. Moreover, the inner forming surface is not directly connected to the venting channel, so it does not need to be precision machined, which reduces the processing complexity of the front frame injection mold. In addition, the inner forming surface is used to form the inner surface of the front frame. That is, the venting gap is located on the inner surface of the front frame after molding, which improves the flash and burrs on the appearance surface of the front frame, thereby improving the surface appearance qualification rate of the front frame. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an injection mold for the front frame according to one embodiment of the present invention;

[0021] Figure 2 for Figure 1 The front frame shown is a cross-sectional view using an injection mold;

[0022] Figure 3 for Figure 2 The enlarged view of part A of the injection mold used for the front frame shown;

[0023] Figure 4 for Figure 1 Another sectional view of the front frame using an injection mold, as shown. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] This application provides an injection mold for a front frame. The injection mold includes a mold base and a core. The core is connected to one side of the mold base to form a venting gap. The side of the core away from the mold base and the side of the mold base near the core together form an inner molding surface. The inner molding surface is used to mold the inner surface of the front frame. The venting gap communicates with the inner molding surface. The mold base has at least one venting channel, which communicates with the venting gap.

[0028] The aforementioned injection mold for the front frame has a core connected to one side of the mold base to form an venting gap. The venting channel communicates with the venting gap. Together with the side of the core away from the mold base and the side of the mold base close to the core, they form an inner molding surface. That is, the venting gap is used to communicate with the inner molding surface, which means that the gas located at the inner molding surface during injection is discharged through the venting gap. Combined with the venting channel, the gas vented from the inner molding surface during injection is effectively discharged. Moreover, the inner molding surface is not directly connected to the venting channel, so it does not need to be precision machined, which reduces the processing complexity of the injection mold for the front frame. In addition, the inner molding surface is used to form the inner surface of the front frame. That is, the venting gap is located on the inner surface of the front frame after molding, which improves the flash and burrs on the appearance surface of the front frame, thereby improving the surface appearance qualification rate of the front frame.

[0029] To better understand the injection mold for the front frame of this application, the following further explanation is provided:

[0030] Please refer to the following: Figures 1 to 4In one embodiment, the injection mold 10 for the front frame includes a mold base 100 and a core 200. The core 200 is connected to one side surface of the mold base 100 to form an venting gap 201. The side surface of the core 200 away from the mold base 100 and the side surface of the mold base 100 near the core 200 together form an inner molding surface 202. The inner molding surface 202 is used to mold the inner surface of the front frame 20. The venting gap 201 communicates with the inner molding surface 202. The mold base 100 is provided with at least one venting channel 101, which communicates with the venting gap 201.

[0031] The aforementioned front frame injection mold 10 has a core 200 connected to one side of the mold base 100 to form an exhaust gap 201. The exhaust channel 101 communicates with the exhaust gap 201. Together with the side of the core 200 away from the mold base 100 and the side of the mold base 100 close to the core 200, they form an inner molding surface 202. That is, the exhaust gap 201 is used to communicate with the inner molding surface 202, which means that the gas located at the inner molding surface 202 during injection is discharged through the exhaust gap 201. Combined with the exhaust channel 101, the gas vented from the inner molding surface 202 during injection is effectively discharged. Moreover, the inner molding surface 202 is not directly connected to the exhaust channel 101, so it does not need to be precision machined, which reduces the processing complexity of the front frame injection mold 10. In addition, the inner molding surface 202 is used to form the inner surface of the front frame 20, that is, the exhaust gap 201 is located on the inner surface of the formed front frame 20, which improves the flash and burrs on the appearance surface of the front frame 20, thereby improving the surface appearance qualification rate of the front frame 20.

[0032] In one embodiment, the venting gap at the end near the inner molding surface has a gap width of 45μm to 55μm, which effectively ensures the gas is effectively discharged from the inner molding surface during injection molding while reducing burrs and flash on the inner surface of the front frame.

[0033] Please refer to the following: Figures 1 to 4 In one embodiment, a relief groove 102 is provided on the side of the mold base 100 near the core 200. The core 200 is disposed in the relief groove 102 and is disposed opposite to the groove wall of the relief groove 102 to form an exhaust gap 201. The bottom of the relief groove 102 is provided with at least one exhaust channel 101, which improves the connection stability of the core 200 on the mold base 100 and ensures the stability of the formation of the exhaust gap 201.

[0034] Please refer to the following: Figures 1 to 4 In one embodiment, the wall of the relief groove 102 is a wedge-shaped surface 103, which is disposed away from the bottom of the relief groove 102. The peripheral wall of the core 200 is disposed opposite to the wedge-shaped surface 103 to form an exhaust gap 201, which better ensures the structural strength of the core 200.

[0035] Please refer to the following: Figures 1 to 4 In one embodiment, the venting gap 201 is connected to the lowest point of the inner molding surface 202 in the direction of gravity of the molded front frame 20, which better ensures the smooth and effective venting at the inner molding surface 202.

[0036] Please refer to the following: Figures 1 to 4 In one embodiment, the gap width of the venting gap 201 at the end away from the inner molding surface 202 is greater than the gap width of the venting gap 201 at the end close to the inner molding surface 202, thereby improving the venting effect while ensuring the reduction of burrs and flash on the inner surface of the front frame 20.

[0037] Please refer to the following: Figures 1 to 4 In one embodiment, the injection mold 10 for the front frame further includes at least one ejector pin 300. The ejector pin 300 passes through the core 200 and is slidably disposed on the core 200 in a direction close to or away from the inner molding surface 202. The ejector pin 300, the side of the core 200 away from the mold base 100 and the side of the mold base 100 close to the core 200 together form the inner molding surface 202. The ejector pin 300 and the mold base 100 are positioned to avoid each other, ensuring smooth demolding after the front frame 20 is formed.

[0038] Please refer to the following: Figures 1 to 4 In one embodiment, the ejector pin 300 is positioned to avoid the mold base 100 through the venting channel 101, which reduces the processing steps of the injection mold 10 for the front frame and improves the processing efficiency of the injection mold 10 for the front frame.

[0039] In one embodiment, the injection mold for the front frame also includes a mold clamping base. When the mold clamping base and the mold base are closed, an outer molding surface is formed. The outer molding surface and the inner molding surface together form a molding cavity. The molding cavity is used to mold the front frame, and the inner molding surface molds the inner surface of the front frame, which better ensures the effective molding of the front frame.

[0040] This application also provides an injection molding apparatus. One embodiment of the injection molding apparatus includes a work stand and an injection mold for the front frame of any of the above embodiments, with the mold base disposed on the work stand. Further details are also available in the following sections. Figures 1 to 4 In this embodiment, the injection mold 10 for the front frame includes a mold base 100 and a core 200. The core 200 is connected to one side of the mold base 100 to form an venting gap 201. The side of the core 200 away from the mold base 100 and the side of the mold base 100 near the core 200 together form an inner molding surface 202. The inner molding surface 202 is used to mold the inner surface of the front frame 20. The venting gap 201 communicates with the inner molding surface 202. The mold base 100 is provided with at least one venting channel 101, which communicates with the venting gap 201.

[0041] The aforementioned injection molding equipment uses injection molds for the front frame, which effectively improves the appearance of the front frame by reducing burrs and flash, thereby increasing the surface appearance qualification rate of the front frame.

[0042] Compared with the prior art, the present invention has at least the following advantages:

[0043] The front frame injection mold 10 of this utility model has a core 200 connected to one side of the mold base 100 to form an exhaust gap 201. An exhaust channel 101 communicates with the exhaust gap 201. The side of the core 200 away from the mold base 100 and the side of the mold base 100 close to the core 200 together form an inner molding surface 202. That is, the exhaust gap 201 is used to communicate with the inner molding surface 202, that is, the gas located at the inner molding surface 202 during injection is discharged through the exhaust gap 201. Combined with the exhaust channel 101, the gas vented from the inner molding surface 202 during injection is effectively discharged. Moreover, the inner molding surface 202 is not directly connected to the exhaust channel 101, so it does not need to be precision machined, which reduces the processing complexity of the front frame injection mold 10. In addition, the inner molding surface 202 is used to form the inner surface of the front frame 20, that is, the exhaust gap 201 is located on the inner surface of the front frame 20 after molding, which improves the flash and burrs on the appearance surface of the front frame 20, thereby improving the surface appearance qualification rate of the front frame 20.

[0044] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An injection mold for a front frame, characterized in that, The device includes a mold base and a core. The core is connected to one side of the mold base to form an exhaust gap. The side of the core away from the mold base and the side of the mold base near the core together form an inner forming surface. The inner forming surface is used to form the inner surface of the front frame. The exhaust gap is connected to the inner forming surface. The mold base is provided with at least one exhaust channel, which is connected to the exhaust gap.

2. The injection mold for the front frame according to claim 1, characterized in that, The width of the exhaust gap at the end near the inner forming surface is 45μm to 55μm.

3. The injection mold for the front frame according to claim 1, characterized in that, The mold base has a relief groove on one side near the core. The core is located in the relief groove and is positioned opposite the groove wall to form the venting gap. The bottom of the relief groove has at least one venting channel.

4. The injection mold for the front frame according to claim 3, characterized in that, The wall of the relief groove is a wedge-shaped surface, which is set away from the bottom of the relief groove. The peripheral wall of the core is set opposite to the wedge-shaped surface to form the exhaust gap.

5. The injection mold for the front frame according to claim 1, characterized in that, In the direction of gravity of the formed front frame, the venting gap is connected to the lowest point of the inner molded surface.

6. The injection mold for the front frame according to claim 1, characterized in that, The width of the exhaust gap at the end furthest from the inner molding surface is greater than the width of the exhaust gap at the end closest to the inner molding surface.

7. The injection mold for the front frame according to claim 1, characterized in that, The injection mold for the front frame also includes at least one ejector pin, which passes through the core and slides on the core in a direction close to or away from the inner molding surface. The ejector pin, the side of the core away from the mold base, and the side of the mold base close to the core together form the inner molding surface. The ejector pin is positioned away from the mold base.

8. The injection mold for the front frame according to claim 7, characterized in that, The ejector pin is positioned to avoid contact with the mold base via the venting channel.

9. The injection mold for the front frame according to claim 1, characterized in that, The injection mold for the front frame also includes a mold clamping base. When the mold clamping base and the mold base are closed, they form an outer molding surface. The outer molding surface and the inner molding surface together form a molding cavity. The molding cavity is used to mold the front frame, and the inner molding surface molds the inner surface of the front frame.

10. An injection molding machine, characterized in that, It includes a work frame and an injection mold for a front frame as described in any one of claims 1 to 9, wherein the mold base is disposed on the work frame.

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