Mold transfer mold assembly and mold transfer apparatus

Abstract

The utility model discloses a kind of moulding transfer injection mould assembly and moulding equipment, it is related to rubber encapsulation technical field, wherein, moulding transfer injection mould assembly is used to encapsulate annular base material, including upper mould with runner, runner is annular;Lower mould is located below the upper mould;Mold core, protrude is located at the top of the upper mould, the base material is located at the outer periphery of the mold core;Middle mould, between the upper mould and the lower mould, and is sleeved on the outer periphery of the mold core, interval is formed between the inner wall of the middle mould and the mold core, the upper mould, lower mould, middle mould and mold core are enclosed and form cavity, the runner is communicated with the cavity;And pressing plate, located in the side of the upper mould away from the lower mould, to flow into the cavity by the pressing plate of the rubber in the runner, the lower pressure of the rubber in the runner is flowed into the cavity by the pressing plate of the rubber in the runner.The technical scheme provided by the utility model solves the technical problem that annular base material is easy to be not filled when injecting.

Description

Technical Field

[0001] This utility model relates to the field of rubber overmolding technology, and in particular to a molding transfer mold assembly and molding equipment. Background Technology

[0002] Rubber overmolding is a secondary processing technique in which rubber material is wrapped or bonded to the surface of another substrate (usually metal or a hard material) by means of heating and pressurization. First, the metered rubber material is placed into an independent material cavity, heated and softened, and pressure is applied through a plunger to force the molten rubber material to be injected through the runner and gate and fill the closed mold cavity. It is then heated and cured in the mold cavity. For large ring-shaped substrates, if the rubber is only injected from the middle, there will be incomplete injection molding. Utility Model Content

[0003] The main purpose of this utility model is to propose a molding transfer mold assembly and molding equipment, which aims to solve the technical problem of incomplete filling when injecting glue into a ring-shaped substrate from the middle.

[0004] To achieve the above objectives, the present invention proposes a molding transfer mold assembly for overmolding a substrate, wherein the substrate is annular, and the mold assembly comprises:

[0005] The upper mold has a flow channel, which is annular;

[0006] The lower mold is located below the upper mold;

[0007] A mold core is protruding from the top of the upper mold, and the base material is disposed on the outer periphery of the mold core;

[0008] A middle mold, disposed between the upper mold and the lower mold, and fitted around the outer periphery of the mold core, wherein the inner wall of the middle mold forms a gap with the mold core, and the upper mold, lower mold, middle mold, and mold core together form a cavity, and the flow channel communicates with the cavity; and

[0009] A pressure plate is located on the side of the upper mold away from the lower mold, so that the rubber in the flow channel flows into the cavity by pressing down on the pressure plate.

[0010] In one embodiment, the flow channel is configured as an annular groove, and a plurality of injection holes are provided at the bottom of the groove, the plurality of injection holes being spaced apart circumferentially.

[0011] In one embodiment, the diameter of the injection hole decreases from top to bottom.

[0012] In one embodiment, the upper end of the lower mold is provided with a circular placement groove, the mold core protrudes into the placement groove, and the outer periphery of the mold core and the inner wall of the placement groove form an upward-opening lower mold cavity, the lower mold cavity being in communication with the mold cavity.

[0013] In one embodiment, the bottom of the upper mold has an upper mold cavity with an opening facing downwards, and the upper mold cavity is in communication with the mold cavity.

[0014] In one embodiment, a limiting plate is provided protruding upward in the placement groove, and a limiting groove is provided at the bottom of the mold core. The limiting plate is disposed in the limiting groove to limit the rotation of the mold core in the placement groove.

[0015] And / or, the lower mold further includes a fastener that passes through the lower mold from bottom to top and is screwed to the mold core.

[0016] In one embodiment, the mold core is provided with a boss on the outer periphery of one end of the placement groove, and the boss is located at the bottom of the substrate.

[0017] In one embodiment, the bottom of the pressure plate is provided with an annular protrusion, which is disposed within the annular groove.

[0018] In one embodiment, the pressure plate is made of P20.

[0019] And / or, the upper mold and / or the lower mold and / or the middle mold and / or the mold core are made of 718H material.

[0020] This utility model also proposes a molding device, including a molding transfer mold assembly as described in any of the preceding claims.

[0021] In this invention, the mold assembly includes a lower mold, a mold core on the lower mold, and a base material fitted around the outer periphery of the mold core. The outer periphery of the mold core is in contact with the inner wall of the base material. A middle mold is fitted around the outer periphery of the base material, with a gap between the inner wall of the middle mold and the outer wall of the mold core. The middle mold is located above the lower mold, and an upper mold is located above the middle mold. The lower part of the upper mold, the inner wall of the middle mold, the top of the lower mold, and the outer periphery of the mold core together form an annular cavity. The upper mold has a flow channel, into which molten rubber is placed. As the pressure plate is pressed down, the rubber in the flow channel flows into the cavity. The flow channel is annular, has the same shape as the cavity, and is positioned corresponding to the cavity. Compared to injecting rubber from the center, where the rubber spreads outwards and may not be fully filled, in this solution, when the rubber is in the flow channel, as the pressure plate is pressed down, the rubber can flow evenly into the cavity in the annular flow channel, improving the quality of the coating. Furthermore, this solution is applicable to annular base materials of any size and has a wide range of applications. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the molding transfer mold assembly provided by this utility model;

[0024] Figure 2 This is an exploded structural diagram of an embodiment of the molding transfer mold assembly provided by this utility model;

[0025] Figure 3 This is an exploded structural diagram of another embodiment of the molding transfer mold assembly provided by this utility model;

[0026] Figure 4 A cross-sectional schematic diagram of the molding transfer mold assembly provided by this utility model;

[0027] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0028] Explanation of icon numbers:

[0029] 10. Base material; 20. Track;

[0030] 100. Lower mold; 101. Placement slot; 110. Limiting plate;

[0031] 200. Upper mold; 210. Runner; 220. Injection hole;

[0032] 300, mold core; 301, limiting groove; 310, boss;

[0033] 400. Medium mold; 401. Cavity;

[0034] 500, pressure plate; 510, protrusion.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] Rubber overmolding is a secondary processing technique in which rubber material is wrapped or bonded to the surface of another substrate (usually metal or a hard material) by means of heating and pressurization. First, the metered rubber material is placed into an independent material cavity, heated and softened, and pressure is applied through a plunger to force the molten rubber material to be injected through the runner and gate and fill the closed mold cavity. It is then heated and cured in the mold cavity. For large ring-shaped substrates, if the rubber is only injected from the middle, there will be incomplete injection molding.

[0040] This utility model proposes a molding transfer mold assembly and molding equipment.

[0041] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of this utility model, the molding transfer mold assembly is used to encapsulate the substrate 10, the substrate 10 being annular, and the mold assembly includes:

[0042] The upper mold 200 has a runner 210, which is annular;

[0043] The lower mold 100 is located below the upper mold 200;

[0044] The mold core 300 protrudes from the top of the upper mold 200, and the base material 10 is disposed on the outer periphery of the mold core 300;

[0045] A middle mold 400 is located between the upper mold 200 and the lower mold 100, and is fitted around the outer periphery of the mold core 300. A gap is formed between the inner wall of the middle mold 400 and the mold core 300. The upper mold 200, lower mold 100, middle mold 400, and mold core 300 together form a cavity 401, and the flow channel 210 communicates with the cavity 401.

[0046] The pressure plate 500 is located on the side of the upper mold 200 away from the lower mold 100, so that the rubber in the flow channel 210 flows into the cavity 401 by the downward pressure of the pressure plate 500.

[0047] In the technical solution of this utility model, the mold assembly includes a lower mold 100, a mold core 300 is provided on the lower mold 100, and a base material 10 is sleeved on the outer periphery of the mold core 300. The outer periphery of the mold core 300 is in contact with the inner wall of the base material 10. A middle mold 400 is sleeved on the outer periphery of the base material 10, and a gap is formed between the inner wall of the middle mold 400 and the outer wall of the mold core 300. The middle mold 400 is located above the lower mold 100. An upper mold 200 is provided above the middle mold 400. The lower part of the upper mold 200, the inner wall of the middle mold 400, the top of the lower mold 100, and the outer periphery of the mold core 300 together form an annular cavity 401. The device has a flow channel 210, into which molten rubber is placed. As the pressure plate 500 presses down, the rubber in the flow channel 210 flows into the cavity 401. The flow channel 210 is annular and has the same shape as the cavity 401, and the flow channel 210 is set corresponding to the cavity 401. Compared with injecting rubber from the middle, where the rubber spreads in all directions and may not be fully filled, in this solution, when the rubber is in the flow channel 210, as the pressure plate 500 presses down, the rubber can flow evenly into the cavity 401 in the annular flow channel 210, improving the quality of the overmolding. Moreover, this solution is applicable to annular substrates 10 of any size and has a wide range of applications.

[0048] Specifically, the shapes of the upper mold 200, lower mold 100, and middle mold 400 are not limited. In this embodiment, the material of the annular substrate 10 is soft rubber. The track 20 is generated by coating the substrate 10 with rubber. To accommodate the annular substrate 10, the outer periphery of the mold core 300 is set to be circular so that the substrate 10 can cover the outer periphery of the mold core 300. The outer periphery of the mold core 300 is provided with meshing teeth. The mold core 300 serves as the inner mold. The middle mold 400 has a circular hole in the middle, and the inner wall of the hole has meshing teeth. The mold core 300 is placed in the hole so that a gap is formed between the outer periphery of the mold core 300 and the inner wall of the hole. The lower mold 100 and the upper mold 200 cover the gap below and above the gap, respectively. Except where the flow channel 210 connects with the cavity 401, the gap is in annular closed shape. After the rubber material flows into the annular cavity 401 through the annular flow channel 210, it cools and forms, completing the coating of the substrate 10. The inner and outer rings of the coated track 20 product correspond to the meshing teeth of the outer periphery of the mold core 300 and the inner wall of the hole.

[0049] In one embodiment, the pressure plate 500 is made of P20, which has a certain degree of toughness and does not deform when pressing down on the runner 210, facilitating the stable pressing of the rubber material in the runner 210 into the cavity 401 even after multiple presses. In one embodiment, the upper mold 200, lower mold 100, middle mold 400, and mold core 300 are made of 718H, which has high hardness and will not deform during multiple overmolding processes, ensuring the quality of injection molding. In one embodiment, the pressure plate 500 can also be made of 718H, NAK80, or P20+Ni, and the upper mold 200, lower mold 100, middle mold 400, and mold core 300 can also be made of S136, SKD61, 738H, etc., without limitation.

[0050] In an embodiment of this utility model, the flow channel 210 is configured as an annular groove, and a plurality of glue injection holes 220 are provided at the bottom of the groove, with the plurality of glue injection holes 220 spaced apart circumferentially.

[0051] Please refer to Figure 2 An annular groove is provided on the top of the upper mold 200. This groove is configured as a flow channel 210. Molten rubber material is placed in the groove, so that the rubber material flows into the cavity 401 through the injection hole 220 at the bottom. The groove can hold the rubber material, and the rubber material is blocked by the inner wall of the groove, effectively preventing the rubber material from overflowing.

[0052] In one embodiment, such as Figure 4 and Figure 5 As shown, the diameter of the injection hole 220 decreases from top to bottom. The shape of the injection hole 220 is funnel-shaped. The rubber material in the flow channel 210 flows downward into the cavity 401 through the injection hole 220. The inner wall of the injection hole 220 is inclined to facilitate flow guidance.

[0053] In an embodiment of this utility model, a circular placement groove 101 is provided at the upper end of the lower mold 100, the mold core 300 protrudes into the placement groove 101, and the outer periphery of the mold core 300 and the inner wall of the placement groove 101 form an upward-opening lower mold cavity, which is connected to the cavity 401.

[0054] Please refer to Figure 2 and Figure 3 A circular placement groove is also provided in the placement groove 101. The inner diameter of the placement groove is smaller than that of the placement groove 101. The bottom of the mold core 300 has a protrusion. The outer diameter of the protrusion is smaller than that of the mold core 300, forming a step. The mold core 300 is assembled downward into the lower mold 100. The protrusion is located in the placement groove, and the outer wall of the protrusion fits against the inner wall of the placement groove. The mold core 300 is placed in the placement groove 101, and there is a gap between it and the inner wall of the placement groove 101 to form a lower mold cavity. The lower mold cavity is connected to the cavity 401 and is located at the bottom of the cavity 401. When the rubber material flows into the cavity 401, it also flows into the lower mold cavity, realizing the coating of the outer periphery and bottom wall of the substrate 10.

[0055] Please refer to Figure 4 and Figure 5 In an embodiment of this utility model, the bottom of the upper mold 200 has an upper mold cavity with an opening facing downwards. The upper mold cavity is connected to the cavity 401. The glue injection hole 220 first passes through the upper mold cavity and then reaches the cavity 401. The arrangement of the upper mold cavity, the lower mold cavity, and the cavity 401 enables the top, bottom, and outer periphery of the substrate 10 to be coated with glue.

[0056] Please refer to Figure 2 and Figure 3 In this embodiment of the present invention, a limiting plate 110 is provided protruding upward in the placement groove 101, and a limiting groove 301 is provided at the bottom of the mold core 300. The limiting plate 110 is disposed in the limiting groove 301 to limit the rotation of the mold core 300 in the placement groove 101. The limiting plate 110 is an irregular shape, and the shape of the corresponding limiting groove 301 is the same as the shape of the limiting plate 110. In this embodiment, the shape of the limiting plate 110 is "bow". When assembling the mold core 300 and the lower mold 100, the limiting plate 110 and the limiting groove 301 are aligned. Due to the limitation of the limiting groove 301 and the limiting plate 110, the rotation of the mold core 300 in the placement groove 101 can be restricted, so as to avoid affecting the glue injection.

[0057] In one embodiment, the lower mold 100 further includes a fastener that passes through the lower mold 100 from bottom to top and is screwed to the mold core 300. The fastener is a threaded component such as a screw, passing upward from the bottom of the lower mold 100 and through the mold core 300 to further secure the lower mold 100 and the mold core 300. Furthermore, the connection between the mold core 300 and the lower mold 100 via screws facilitates disassembly and replacement of the mold core 300 or the lower mold 100.

[0058] In an embodiment of this utility model, a boss 310 is provided on the outer periphery of one end of the mold core 300 protruding from the placement groove 101. The boss 310 is located at the bottom of the substrate 10, and the protruding edge is configured as the meshing teeth on the outer periphery of the mold core 300. The substrate 10 meshes with the outer periphery of the mold core 300 and is fixed. At the same time, the bottom of the substrate 10 is coated with glue in the cavity 401.

[0059] In embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the bottom of the pressure plate 500 is provided with an annular protrusion 510, which is located in an annular groove. The shape and size of the protrusion 510 are consistent with the shape and size of the groove. When the pressure plate 500 moves downward, the protrusion 510 at the bottom of the pressure plate 500 enters the groove. As the pressure plate 500 descends, the protrusion 510 presses the rubber material in the groove from the injection hole 220 into the cavity 401. The protrusion 510 is set as an annular shape that matches the groove, so that when the pressure plate 500 is pressed down, the rubber in the flow channel 210 can be evenly pressed into the cavity 401, ensuring the consistency of the injection.

[0060] This utility model also proposes a molding equipment, which includes a frame, a lifting assembly, and a molding transfer mold assembly. The specific structure of the molding transfer mold assembly is as described in the above embodiments. Since this molding equipment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The lifting assembly and the transfer mold assembly are both mounted on the frame. The lifting assembly uses linear drive components such as a lead screw and nut pair and a cylinder. The lifting assembly drives the pressure plate 500 to descend, so as to press the rubber in the flow channel 210 into the cavity 401.

[0061] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A molding transfer mold assembly for overmolding a substrate, wherein the substrate is annular, characterized in that, The mold assembly includes: The upper mold has a flow channel, which is annular; The lower mold is located below the upper mold; A mold core is protruding from the top of the upper mold, and the base material is disposed on the outer periphery of the mold core; A middle mold, disposed between the upper mold and the lower mold, and fitted around the outer periphery of the mold core, wherein the inner wall of the middle mold forms a gap with the mold core, and the upper mold, lower mold, middle mold, and mold core together form a cavity, and the flow channel communicates with the cavity; and A pressure plate is located on the side of the upper mold away from the lower mold, so that the rubber in the flow channel flows into the cavity by pressing down on the pressure plate.

2. The molding transfer mold assembly as described in claim 1, characterized in that, The flow channel is configured as an annular groove, and multiple injection holes are provided at the bottom of the groove, with the multiple injection holes spaced apart circumferentially.

3. The molding transfer mold assembly as described in claim 2, characterized in that, The diameter of the injection holes decreases from top to bottom.

4. The molding transfer mold assembly as described in claim 2, characterized in that, The upper end of the lower mold is provided with a circular placement groove, the mold core protrudes into the placement groove, and the outer periphery of the mold core and the inner wall of the placement groove form an upward-opening lower mold cavity, the lower mold cavity is connected to the mold cavity.

5. The molding transfer mold assembly as described in claim 4, characterized in that, The bottom of the upper mold has an upper mold cavity that opens downwards, and the upper mold cavity is connected to the mold cavity.

6. The molding transfer mold assembly as described in claim 4, characterized in that, A limiting plate is provided protruding upward in the placement groove, and a limiting groove is provided at the bottom of the mold core. The limiting plate is located in the limiting groove to limit the rotation of the mold core in the placement groove. And / or, the lower mold further includes a fastener that passes through the lower mold from bottom to top and is screwed to the mold core.

7. The molding transfer mold assembly as described in claim 6, characterized in that, The mold core has a boss on its outer periphery protruding from one end of the placement groove, and the boss is located at the bottom of the substrate.

8. The molding transfer mold assembly as described in any one of claims 2-7, characterized in that, The bottom of the pressure plate is provided with an annular protrusion, which is located within the annular groove.

9. The molding transfer mold assembly as described in claim 8, characterized in that, The material of the pressure plate is P20; And / or, the upper mold and / or the lower mold and / or the middle mold and / or the mold core are made of 718H material.

10. A molding device, characterized in that, Includes the molding transfer mold assembly as described in any one of claims 1-9.

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