Exhaust structure of mold insert and injection mold

Abstract

The exhaust structure comprises a mold core and a mold core insert, an insert groove is formed in the upper surface of the mold core, the mold core insert is tightly matched and fixed in the insert groove, air guide grooves are concavely formed in the side walls, around the insert groove, of the mold core at intervals, and air guide holes penetrating through the mold core are formed in the periphery of the bottom wall of the insert groove. And exhaust grooves are concavely formed in the positions, on the periphery of the insert groove, of the upper surface of the mold core at intervals, and the exhaust grooves communicate with the air guide grooves. According to the exhaust structure of the mold insert and the injection mold, the air trapping problem of the injection mold is solved, and the product percent of pass and the production efficiency are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to an exhaust structure of a mold insert and an injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products. It mainly refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product. During the manufacturing process, the air inside the mold needs to be discharged. In order to avoid problems such as burns on the surface of the product and insufficient injection volume, the exhaust structure is particularly important.

[0003] However, the existing molds for producing injection molded products generally have incomplete exhaust systems, no exhaust or little exhaust, and the products produced have large deformation in appearance, serious scorched flash, and unstable dimensions, which makes the products impossible to assemble and seal. Alternatively, the internal surfaces of the products are easily scratched, scorched, and have serious air-trapped flash, making repairs difficult. Therefore, it also seriously affects the product qualification rate and production efficiency. Utility Model Content

[0004] The utility model aims to provide an exhaust structure of a mold insert and an injection mold which can effectively solve the problem of air entrapment in an injection mold.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A venting structure for a mold insert comprises: a mold core and a mold core insert, wherein an insert groove is provided on the upper surface of the mold core, the mold core insert is tightly fixed in the insert groove, the mold core has air guide grooves recessed at intervals on the side walls around the insert groove, air guide holes penetrating the mold core are provided around the bottom wall of the insert groove, the air guide grooves are connected to the air guide holes, and exhaust grooves are recessed at intervals on the upper surface of the mold core around the insert groove, the exhaust grooves are connected to the air guide grooves.

[0007] Furthermore, an annular air guide channel is recessed at the connection between the side wall and the bottom wall of the insert groove, and the air guide groove and the air guide hole are connected via the air guide channel.

[0008] Furthermore, the mold core is provided with an exhaust passage connected to the air guide hole.

[0009] Furthermore, the exhaust channel is arranged on the lower surface of the mold core.

[0010] Furthermore, the upper surface of the mold core is provided with a clamping groove connected to the insert groove around the insert groove.

[0011] Furthermore, the exhaust groove is recessed in the clamping groove.

[0012] Furthermore, a clamping portion is convexly provided around the upper surface of the mold core insert corresponding to the clamping groove of the mold core, and the clamping portion is clamped in the clamping groove.

[0013] Furthermore, a molding groove connected to the exhaust groove is concavely provided on the upper surface of the mold core.

[0014] Furthermore, the molding groove is annularly arranged around the insert groove.

[0015] An injection mold comprises the above-mentioned exhaust structure of the mold insert.

[0016] The utility model provides an exhaust structure of a mold insert and an injection mold, which solves the problem of air entrapment in the injection mold and greatly improves the product qualification rate and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional exploded view of the exhaust structure of a mold insert of the utility model.

[0018] Figure 2 for Figure 1 A partial enlarged view of location C of a venting structure of a mold insert is shown.

[0019] Figure 3 It is a top view of an exhaust structure of a mold insert of the utility model.

[0020] Figure 4 for Figure 3 A cross-sectional view of a venting structure of a mold insert taken at BB is shown.

[0021] Figure 5 for Figure 4 A partial enlarged view of a venting structure of a mold insert at D is shown.

[0022] Figure 6 It is a three-dimensional cross-sectional view of an exhaust structure of a mold insert of the utility model.

[0023] Figure 7 for Figure 6 A partial enlarged view of A of a venting structure of a mold insert is shown.

[0024] Figure 8 It is a three-dimensional view from another angle of the exhaust structure of a mold insert of the utility model. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] See also Figure 1 The utility model discloses a venting structure of a mold insert, which is used for an injection molded product 100 having an annular protrusion 101, and includes a mold core 10 and a mold core insert 20 matched with the mold core 10 and installed in the mold core 10.

[0027] Please continue reading Figure 1 The upper surface of the mold core 10 is provided with an insert groove 11. The mold core insert 20 is tightly fitted and fixed in the insert groove 11.

[0028] See also Figure 1 and Figure 2 The mold core 10 is provided with air guide grooves 12 at intervals on the side walls around the insert groove 11. In this embodiment, the air guide grooves 12 extend in a vertical direction and are arranged in pairs on the side walls of the insert groove 11.

[0029] Furthermore, the bottom wall of the insert groove 11 is provided with air guide holes 13 penetrating the mold core 10. The air guide grooves 12 are connected to the air guide holes 13. In this embodiment, the air guide holes 13 are arranged between the paired air guide grooves 12.

[0030] Please continue reading Figure 1 and Figure 2 In more detail, a ring-shaped air guide channel 18 is recessed at the connection between the side wall and the bottom wall of the insert groove 11. The air guide groove 12 and the air guide hole 13 are connected through the air guide channel 18.

[0031] The upper surface of the mold core 10 is provided with exhaust grooves 15 at intervals around the insert groove 11 . The exhaust grooves 15 are connected to the air guide groove 12 .

[0032] In more detail, the upper surface of the mold core 10 is provided with a clamping groove 14 which is connected to the insert groove 11 and is concavely arranged around the insert groove 11. The exhaust groove 15 is concavely arranged in the clamping groove 14.

[0033] See also Figure 1 , Figure 6 and Figure 7 Furthermore, a clamping portion 21 is convexly provided around the upper surface of the mold core insert 20 corresponding to the clamping groove 14 of the mold core 10 . The clamping portion 21 is correspondingly clamped in the clamping groove 14 .

[0034] See also Figure 8 The mold core 10 is provided with an exhaust passage 17 communicating with the air guide hole 13. In this embodiment, the exhaust passage 17 is arranged on the lower surface of the mold core 10.

[0035] See also Figure 3 , Figure 4 and Figure 5 The upper surface of the mold core 10 is concavely provided with a molding groove 16 connected to the exhaust groove 15. The molding groove 16 is annularly arranged around the insert groove 11. In more detail, the molding groove 16 is annularly arranged around the clamping groove 14.

[0036] Among them, during injection molding, the annular protrusion 101 of the injection molded product 100 is molded in the molding groove 16 of the mold core 10, and the trapped air generated by the annular protrusion 101 of the injection molded product 100 passes through the exhaust groove 15 in the clamping groove 14 along the air guide groove 12, the air guide channel 18, the air guide hole 13, and is finally discharged to the outside of the mold core 10 through the exhaust channel 17, so that the product size of the molded injection molded product 100 with the annular protrusion 101 is stable, and there will be no scorching flash phenomenon, thereby ensuring the good sealing of the assembled product.

[0037] The utility model also discloses an injection mold, comprising the exhaust structure of the mold insert.

[0038] The utility model provides an exhaust structure of a mold insert and an injection mold, which solves the problem of air entrapment in the injection mold and greatly improves the product qualification rate and production efficiency.

[0039] In the accompanying drawings, the sizes and relative sizes of layers and regions are exaggerated for clarity. It should be understood that when an element, such as a layer, region, or substrate, is referred to as being "formed on," "disposed on," or "located on" another element, the element may be disposed directly on the other element, or there may be intervening elements. Conversely, when an element is referred to as being "formed directly on" or "disposed directly on" another element, there are no intervening elements.

[0040] In this document, unless otherwise specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of the technical solution and the convenience of description, and therefore should not be understood as limitations on this application.

[0042] In this document, the ordinal adjectives “first”, “second”, etc. used to describe elements are only used to distinguish elements with similar attributes, and do not mean that the elements described in this way must follow a given order, or time, space, level or other limitations.

[0043] As used herein, unless otherwise specified, “plurality” or “several” means two or more.

[0044] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0045] 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 disclosed by 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 venting structure for a mold insert, characterized in that: include: A mold core and a mold core insert, wherein an insert groove is provided on the upper surface of the mold core, the mold core insert is tightly fixed in the insert groove, the mold core has air guide grooves recessed at intervals on the side walls around the insert groove, air guide holes penetrating the mold core are provided around the bottom wall of the insert groove, the air guide grooves are connected to the air guide holes, and exhaust grooves are recessed at intervals around the insert groove on the upper surface of the mold core, the exhaust grooves are connected to the air guide groove.

2. The exhaust structure of the mold insert according to claim 1, characterized in that: An annular air guide channel is recessed at the connection between the side wall and the bottom wall of the insert groove, and the air guide groove and the air guide hole are connected through the air guide channel.

3. The exhaust structure of the mold insert according to claim 1, characterized in that: The mold core is provided with an exhaust passage connected to the air guide hole.

4. The exhaust structure of the mold insert according to claim 3, characterized in that: The exhaust channel is arranged on the lower surface of the mold core.

5. The exhaust structure of the mold insert according to claim 1, characterized in that: The upper surface of the mold core is concavely provided with a clamping groove communicating with the insert groove around the insert groove.

6. The exhaust structure of the mold insert according to claim 5, characterized in that: The exhaust groove is recessed in the clamping groove.

7. The exhaust structure of the mold insert according to claim 6, characterized in that: The upper surface of the mold core insert is provided with a clamping portion convexly around the four sides corresponding to the clamping groove of the mold core, and the clamping portion is clamped in the clamping groove.

8. The exhaust structure of the mold insert according to claim 1, characterized in that: The upper surface of the mold core is concavely provided with a molding groove connected to the exhaust groove.

9. The exhaust structure of the mold insert according to claim 8, characterized in that: The molding groove is annularly arranged around the insert groove.

10. An injection mold, characterized in that: A venting structure comprising a mold insert as described in any one of claims 1-8.

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