In-mold cold flow groove structure

Abstract

The utility model provides an in-mold cold runner structure, which comprises a first mold and a second mold, cavity runners are arranged between the first mold and the second mold, the cavity runners comprise two first runners and two second runners, one ends of the two first runners are respectively communicated with an injection molding end, and the other ends of the two first runners are respectively communicated with the injection molding end. The other ends of the first flow channel and the second flow channel are respectively connected with two ends of the second flow channel; the first mold is provided with a groove used for being communicated with the middle of the second flow channel to serve as a cold flow groove, so that bubbles of a molten material at the collecting end during injection molding and a low-temperature part of the material can be discharged into the groove and removed after molding, and the material forming a suspended rib in the second flow channel is fully fused; therefore, the molded product has excellent structural strength and is not easy to damage and break so as to meet the market demand.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, specifically, relate to a kind of in-mold cold flow groove structure. BACKGROUND

[0002] The injection molding product with frame on the market currently, some need to form suspended rib, and because the middle part of suspended rib is convergence fusion end, so the structure strength of the place is low after product is formed, easy to break, not meet market demand.

[0003] Therefore, the applicant presents the present application after studying the prior art. CONTENT OF UTILITY MODEL

[0004] The utility model provides a kind of in-mold cold flow groove structure, to improve at least one of the above technical problems.

[0005] To solve the above technical problems, the utility model provides a kind of in-mold cold flow groove structure, including first mold and second mold, the second mold is set on the first mold, and the first mold and second mold are provided with cavity runner between, the cavity runner includes first runner and second runner, the first runner is provided with two, one end of two first runners is communicated with injection end respectively, and the other end is connected with the two ends of the second runner respectively, and the second runner is used to form the suspended rib of product frame;The recess is formed in the first mold and is concave, and the recess is communicated with the middle part of the second runner.

[0006] As further optimization, the recess includes connecting portion and cavity portion, one end of the connecting portion is connected with the second runner, the other end is connected with the cavity portion, and the cavity portion is circularly arranged.

[0007] As further optimization, the width of the connecting portion is less than the diameter of the cavity portion.

[0008] As further optimization, the bottom of the port of the connecting portion input end is higher than the bottom of the second runner.

[0009] As further optimization, when injection, the bottom end of the second mold is flush with the port of the recess.

[0010] As further optimization, two first runners are symmetrically arranged on the two sides of the first runner.

[0011] As further optimization, the first runner and the second runner are vertically arranged.

[0012] By adopting the above technical scheme, the utility model can achieve the following technical effects:

[0013] The application provides a cold runner structure in a mold, comprising a first mold and a second mold, wherein a cavity runner is arranged between the first mold and the second mold, the cavity runner comprises a first runner and a second runner, the first runner is provided with two first runners, one end of the two first runners is communicated with an injection end respectively, and the other end is connected with two ends of the second runner respectively, and the second runner is used for forming a suspended rib of a product frame; a groove is arranged on the first mold and used for communicating with the middle part of the second runner, so as to serve as a cold runner, so that the bubbles and low-temperature part of the molten material at the collection end can be discharged into the groove during injection, and the material for forming the suspended rib in the second runner is fully fused after molding, so that the structural strength of the product after molding is good, and the product is not easy to be damaged and broken, so as to meet the market demand. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0015] Figure 1 is a blasting schematic view of the cold runner structure in the mold of the present application;

[0016] Figure 2 is a cross-sectional structure schematic view of an embodiment of the present application;

[0017] Figure 3 is a local cross-sectional schematic view of an embodiment of the present application;

[0018] Figure 4 is a local cross-sectional structure schematic view of the groove part of an embodiment of the present application;

[0019] Figure 5 is a product structure schematic view of an embodiment of the present application;

[0020] Markings in the figure: 1, first mold; 2, second mold; 3, product; 4, first runner; 5, second runner; 6, suspended rib; 7, groove; 8, connecting part; 9, cavity part; 10, injection port; 11, connecting groove. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Example

[0023] Depend on Figures 1 to 5 As shown, this utility model embodiment provides an in-mold cold runner structure, including a first mold 1 and a second mold 2. The second mold 2 is disposed above the first mold 1. In one embodiment, the injection-molded product 3 is a POS machine. A cavity flow channel is provided between the first mold 1 and the second mold 2 to form the frame portion of the product 3. The cavity flow channel includes a first flow channel 4 and a second flow channel 5. The first flow channel 4 has two channels to form both sides of the frame structure. One end of each of the two first flow channels 4 is connected to the injection end, serving as the input end during frame structure injection. The other end is connected to both ends of the second flow channel 5. The second flow channel 5 forms the suspended ribs 6 of the product 3 frame. A groove 7 is formed recessed in the first mold 1, and the groove 7 is connected to the middle of the second flow channel 5. In this embodiment, during injection molding, the molten material enters from the injection port 10 of the second mold 2, passes through the connecting groove 11 on the first mold 1, and enters the cavity of the product 3 mold. Two streams enter from one end of the two first flow channels 4 and converge towards the second flow channel 5. The formation of other modules and cavity structures of the product 3 will not be described in detail here. After converging to the middle of the second flow channel 5, the two streams of molten material continue to flow into the groove 7 at the convergence end, thereby guiding the air bubbles at the convergence end into the groove 7. The two streams of molten material completely fuse at the convergence end. At the same time, the material with the greatest temperature drop at the farthest end of the molten material is introduced into the groove 7, which serves as a cold flow channel. This allows the weakest structure in the molding structure caused by the cooling of air bubbles and material to be excluded from the product 3 and become an extended structure. Finally, after demolding, the excess parts are removed to obtain the product 3 with good strength suspended ribs 6.

[0024] Preferably, the recess 7 comprises a connecting portion 8 and a cavity portion 9, the connecting portion 8 is connected with the second flow channel 5 at one end and connected with the cavity portion 9 at the other end, and the cavity portion 9 is circularly arranged. By arranging the cavity portion 9 in a circular structure, a larger space can be provided for the bubbles and the material at a lower temperature to flow in, so as to ensure the high quality of the material at the confluence end.

[0025] Further, the width of the connecting portion 8 is smaller than the diameter of the cavity portion 9. The connecting portion 8 with a smaller width can stabilize the pressure in the second flow channel 5 when the materials converge, so as to extrude the excess material into the recess 7, strengthen the convergence effect in the connecting portion 8, and finally guide to the cavity portion 9 and release.

[0026] Preferably, the bottom of the input end port of the connecting portion 8 is higher than the bottom of the second flow channel 5. By forming a height difference between the second flow channel 5 and the connecting portion 8, the extended waste part can be broken by bending after the product 3 is formed, which is very convenient.

[0027] Preferably, during injection molding, the bottom end of the second mold 2 is flush with the port of the recess 7. In this way, when the second mold 2 abuts against the top end of the first mold 1, the recess 7 can be closed to become a closed cavity, and when the mold is separated, the waste end can be easily separated out.

[0028] In order to ensure that the molten material accurately converges at the recess 7, the two first flow channels 4 are symmetrically arranged on both sides of the first flow channel 4.

[0029] As an embodiment, the first flow channel 4 is vertically arranged with the second flow channel 5, so as to form a square frame.

[0030] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An in-mold cold runner structure, characterized in that, The device includes a first mold and a second mold, with the second mold positioned above the first mold. A cavity flow channel is provided between the first mold and the second mold. The cavity flow channel includes a first flow channel and a second flow channel. The first flow channel has two channels, one end of which is connected to the injection end, and the other end is connected to both ends of the second flow channel. The second flow channel is used to form the suspended ribs of the product frame. A groove is formed inward on the first mold, and the groove is connected to the middle of the second flow channel.

2. The in-mold cold runner structure according to claim 1, characterized in that... The groove includes a connecting part and a cavity. One end of the connecting part is connected to the second flow channel, and the other end is connected to the cavity. The cavity is circular.

3. The in-mold cold runner structure according to claim 2, characterized in that... The width of the connecting portion is smaller than the diameter of the cavity.

4. The in-mold cold runner structure according to claim 2, characterized in that... The bottom of the input port of the connection part is higher than the bottom of the second flow channel.

5. The in-mold cold runner structure according to claim 1, characterized in that... During injection molding, the bottom end of the second mold is flush with the port of the groove.

6. The in-mold cold runner structure according to claim 1, characterized in that... Two first flow channels are symmetrically arranged on both sides of the first flow channel.

7. The in-mold cold runner structure according to claim 1, characterized in that... The first flow channel and the second flow channel are arranged perpendicularly.

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