Front mold assembly and injection mold

Abstract

The utility model provides a front mold assembly and an injection mold, the front mold assembly comprises a panel, a front mold plate and a stub bar push block, the panel is separably arranged on the front side of the front mold plate, and a sprue bush is arranged on the panel; a containing groove is further formed in the front side of the front mold plate, and the stub bar pushing block is arranged in the containing groove; the injection mold further comprises a feeding channel communicated with the sprue bush, and the feeding channel is defined by the panel, the front mold plate and the stub bar pushing block jointly. The stub bar pushing block is connected with the panel through a delay linkage structure, so that the panel is separated from the front mold plate by a certain distance and then drives the stub bar pushing block to be separated from the front mold plate through the delay linkage structure. When the mold is opened, the panel is firstly separated to a certain distance and then drives the stub bar pushing block to be separated from the front mold plate through the delay linkage structure, the drainage opening material is pulled out, and demolding of the drainage opening material is achieved.

Description

Technical Field

[0001] This utility model relates to injection molds, specifically to a front mold assembly and an injection mold. Background Technology

[0002] In the front mold of an injection mold, a sprue bushing and a feed channel need to be designed, and the sprue material solidified in the feed channel also needs to be removed. Therefore, existing front molds generally have three templates: a front panel for installing the sprue bushing, a front template for installing the mold core, and a stripper plate located between the front panel and the front template. The stripper plate is used to separate the sprue material, as shown in the injection mold structure disclosed in CN204159875U. However, the dimensions of the three templates are relatively large, making it difficult to further reduce the volume of the injection mold. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a front mold assembly and an injection mold.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A front mold assembly includes a panel, a front mold plate, and a sprue pusher block. The panel is detachably disposed on the front side of the front mold plate and has a sprue sleeve. A receiving groove is also provided on the front side of the front mold plate, and the sprue pusher block is disposed in the receiving groove. The assembly also includes a feeding channel communicating with the sprue sleeve, which is formed by the panel, the front mold plate, and the sprue pusher block. The sprue pusher block is connected to the panel through a delayed linkage structure, so that after the panel is separated from the front mold plate to a certain distance, the delayed linkage structure drives the sprue pusher block to detach from the front mold plate.

[0006] Furthermore, the feeding channel has a one-in-multiple-out structure with multiple diversion channels, and the material head pusher participates in forming each diversion channel of the feeding channel.

[0007] Furthermore, the delayed linkage structure includes a limiting rod and an abutment ring. The bottom of the receiving groove of the front template is also provided with a clearance recess. The panel is provided with a mounting hole, which includes a first hole segment and a second hole segment that are connected. The first hole segment is located at the front end of the second hole segment and the diameter of the first hole segment is larger than that of the second hole segment. The first end of the limiting rod has an abutment cap, and the abutment cap is confined within the first hole segment. The second end of the limiting rod passes through the second hole segment and the material pusher block and extends into the clearance recess. The abutment ring is disposed within the clearance recess and fixed to the second end of the limiting rod. When the panel and the front template are attached, the abutment cap is spaced apart from the second hole segment, and / or the abutment ring is spaced apart from the material pusher block.

[0008] Furthermore, the second end of the limiting rod is provided with a connecting hole and also includes a fixing connector. The fixing connector passes through the abutment ring and is fixed in the connecting hole of the limiting rod, thereby fixing the abutment ring to the second end of the limiting rod.

[0009] Furthermore, the connecting hole is a screw hole, and the fixing connector is a bolt, which is screwed and fixed in the connecting hole.

[0010] Furthermore, the front mold plate includes a front mold frame plate and a front mold insert plate. The front mold frame plate has a through-mounting window in the middle. The front mold insert plate is fixed in the mounting window of the front mold frame plate. The receiving groove and the feeding channel are both set on the front mold insert plate. The front mold insert plate has an injection molding surface that forms the injection cavity on the rear side away from the panel.

[0011] Furthermore, the front mold frame plate has a receiving cavity on the rear side away from the panel, and the mounting window is located in the receiving cavity.

[0012] Furthermore, the front surfaces of the front mold frame plate and the front mold insert are provided with fixing blocks, which simultaneously fix the front mold frame plate and the front mold insert; the panel is provided with a relief cavity for accommodating the fixing blocks.

[0013] Furthermore, the fixing block is fixedly connected to the front mold frame plate and the front mold insert plate by two sets of fastening bolts.

[0014] An injection mold includes at least the aforementioned front mold assembly.

[0015] The technical solution provided by this utility model has the following beneficial effects:

[0016] This application embeds a separable sprue pusher block on the front side of the front mold plate. The feeding channel is formed on the front mold plate and the sprue pusher block. When the mold opens, the panel separates to a certain distance first, and then the sprue pusher block is driven to detach from the front mold plate through a delayed linkage structure, pulling out the sprue material and realizing the demolding of the sprue material. The structural design is simple and ingenious. It eliminates the need for a stripper plate for separating the sprue material, which can further reduce the overall size of the injection mold and effectively reduce costs. Attached Figure Description

[0017] Figure 1 The image shown is a three-dimensional schematic diagram of the front mold assembly in the embodiment. Figure 1 ;

[0018] Figure 2 The image shown is a three-dimensional schematic diagram of the front mold assembly in the embodiment. Figure 2 ;

[0019] Figure 3 The diagram shown is an exploded view of the front mold assembly in the embodiment.

[0020] Figure 4 The image shown is a cross-sectional view of the front mold assembly in the embodiment. Figure 1 ;

[0021] Figure 5 The image shown is a cross-sectional view of the front mold assembly in the embodiment. Figure 2 ;

[0022] Figure 6 The diagram shown is a structural schematic of the front mold panel in the embodiment.

[0023] Figure 7 The diagram shown is a schematic representation of the limiting rod in the embodiment.

[0024] Figure 8 The diagram shown is a partial structural schematic of the front mold assembly in the embodiment. Detailed Implementation

[0025] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figures 1 to 8As shown, this embodiment provides a front mold assembly, including a panel 10, a front template 20, and a sprue pusher block 30. The panel 10 is detachably disposed on the front side of the front template 20, and a sprue sleeve 11 is provided on the panel 10. The front side of the front template 20 is also provided with a receiving groove 221. Specifically, the receiving groove 221 is adapted to the shape of the sprue pusher block 30, and the sprue pusher block 30 is disposed in the receiving groove 221. The sprue pusher block 30 is flush with the front surface of the front template 20. It also includes a feed channel 100 connected to the sprue sleeve 11, the feed channel 100 being formed by the panel 10, the front template 20, and the material pusher block 30. In this embodiment, the feed channel 100 has a one-in-two-out structure with two diversion channels 101. The front surfaces of the front template 20 and the material pusher block 30 are flat surfaces, and the rear surface of the panel 10 is recessed to form a strip-shaped groove. When the panel 10 is in contact with the front template 20, the panel 10, the front template 20, and the material pusher block 30 together form the diversion channels 101 of the feed channel 100. At the same time, the feed channel 100 also includes a through channel 102 disposed in the front template 20, which connects to the end of the diversion channels 101. The material pusher block 30 is connected to the panel 10 through a delayed linkage structure, so that after the panel 10 is separated from the front template 20 to a certain distance, the delayed linkage structure drives the material pusher block 30 to detach from the front template 20.

[0029] During injection molding, the molten plastic is injected through the sprue sleeve 11 and sequentially passes through the branch channel 101 and the through channel 102, finally exiting from the through channel 102 into the injection cavity of the injection mold. After solidification, the molten plastic in the feed channel 100 solidifies to form sprue material. The demolding method of this sprue material is as follows: the panel 10 and the front mold plate 20 separate first. After separation to a certain distance (such as after the sprue material leaves the sprue sleeve 11), the panel 10 forms a limit with the sprue pusher block 20 through a delayed linkage structure. At this time, the continued separation of the panel 10 and the front mold plate 20 will cause the sprue pusher block 30 to detach from the front mold plate, thereby pulling out the sprue material and achieving the demolding operation. The structure provided in this embodiment has the characteristics of simple and ingenious structural design; at the same time, it eliminates the need for a stripper plate for separating the sprue material, which can further reduce the overall size of the injection mold and effectively reduce costs.

[0030] Furthermore, the sprue pusher 30 participates in forming each branch channel 101 of the feed channel 100, that is, each branch channel 101 of the feed channel 100 will pass through the surface of the sprue pusher 30; with this configuration, when the sprue material is pulled out, each branch of the sprue material can be supported by the sprue pusher 30, thereby better ensuring that the sprue material is pulled out completely, avoiding the sprue material from breaking due to uneven force and thus affecting demolding.

[0031] Specifically, in this embodiment, the delayed linkage structure includes a limiting rod 41 and an abutment ring 42. The bottom of the receiving groove 221 of the front template 20 is also provided with a clearance recess 222. The panel 10 is provided with a mounting hole 13, which includes a first hole segment and a second hole segment that are connected. The first hole segment is located at the front end of the second hole segment and the diameter of the first hole segment is larger than that of the second hole segment. The first end of the limiting rod 41 has an abutment cap 411, and the abutment cap 411 is restricted within the first hole segment; that is, the outer diameter of the abutment cap 411 is between the first hole segment and the second hole segment. The second end of the limiting rod 41 passes through the second hole segment and the material head push block 30 and extends into the clearance recess 222. The abutment ring 42 is disposed in the clearance recess 222 and fixed to the second end of the limiting rod 41. Thus, when the limiting rod 41 moves forward, the material head push block 30 can be pulled out together by the abutment ring 42 pressing against it. When the panel 10 and the front template 20 are attached, the abutment cap 411 is spaced apart from the second hole segment, and / or the abutment ring 42 is spaced apart from the material pusher block 30. Figure 5 As shown, the distance between the abutment cap 411 and the second hole section is L1, and the distance between the abutment ring 42 and the material push block 30 is L2. Thus, when the panel 10 and the front template 20 are separated to a distance of L1+L2, a limit will be formed between the panel 10 and the material push block 30.

[0032] Furthermore, the second end of the limiting rod 41 is provided with a connecting hole 412, specifically a screw hole, and also includes a fixing connector 43, which is a bolt. The fixing connector 43 passes through the abutment ring 42 and is screwed and fixed in the connecting hole 412 of the limiting rod 41, thereby fixing the abutment ring 42 to the second end of the limiting rod 41. This assembly structure is simple.

[0033] Of course, in other embodiments, the delayed linkage structure is not limited to this. For example, the aforementioned limiting rod 41 can be directly replaced with a screw, and the second end of the screw passes through the second hole section and is directly fixed on the material head push block 30. The delayed linkage between the panel 10 and the material head push block 30 is achieved by the distance L1 reserved between the abutment cap 411 and the second hole section, etc.

[0034] Specifically, in this embodiment, the front mold plate 20 includes a front mold frame plate 21 and a front mold insert 22. The front mold frame plate 21 has a through-hole mounting window 211 in the middle. The front mold insert 22 is fixed in the mounting window 211 of the front mold frame plate 21. The receiving groove 221 and the feeding channel 100 are both provided on the front mold insert 22. That is, the through channel 102 is provided on the front mold insert 22. The diversion channel 101 is formed by the front mold insert 22. The front mold insert 22 is an injection molding surface that forms the injection cavity on the rear side away from the panel 10. That is, the front mold insert 22 also plays the role of injection molding of the front mold core, further saving space.

[0035] Meanwhile, the front mold frame plate 21 has a receiving cavity 212 on the rear side away from the panel 10, and the mounting window 211 is located in the receiving cavity 212, which is subsequently used to receive the rear mold core, further reducing the volume.

[0036] The front surfaces of the front mold frame plate 21 and the front mold insert plate 22 are provided with fixing blocks 50, which simultaneously fix the front mold frame plate 21 and the front mold insert plate 22. In this embodiment, there are two fixing blocks 50, which are located on opposite sides. Each fixing block 50 is fixedly connected to the front mold frame plate 21 and the front mold insert plate 22 by two sets of fastening bolts 51. That is, each fixing block 50 is provided with two sets of fastening bolts 51, one set of fastening bolts 51 fixing the front mold frame plate 21 and the other set of fastening bolts 51 fixing the front mold insert plate 22, thereby realizing the fixed installation of the front mold frame plate 21 and the front mold insert plate 22. At the same time, the panel 10 is provided with a relief cavity 12 for accommodating the fixing block 50. When the mold is closed, the fixing block 50 is accommodated in the relief cavity 12 of the panel 10.

[0037] The above discloses one preferred embodiment of the front template 20. Of course, it is not limited to this in other embodiments. For example, the front template 21 and the front template 22 can also be fixed by inserting pins from the side; or the front template 20 is a complete plate and the front template core is assembled on the rear side of the front template 20.

[0038] This embodiment also provides an injection mold, which includes at least the front mold assembly described above.

[0039] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A front die assembly characterized by: The front mold assembly comprises a panel, a front mold plate and a sprue push block, the panel is detachably arranged on the front side of the front mold plate, the panel is provided with a sprue bushing, the front side of the front mold plate is further provided with a containing groove, the sprue push block is arranged in the containing groove, the front mold assembly further comprises a feeding channel communicated with the sprue bushing, the feeding channel is formed by the panel, the front mold plate and the sprue push block, the sprue push block is connected with the panel through a delay linkage structure, so that the panel is separated from the front mold plate to a certain distance, and then the sprue push block is driven to separate from the front mold plate through the delay linkage structure.

2. The forward die assembly of claim 1, wherein: The feeding channel is a one-in-multiple-out structure, and has a plurality of shunt channels, and the sprue push block participates in forming each shunt channel of the feeding channel.

3. The forward die assembly of claim 1, wherein: The delay linkage structure comprises a limiting rod and an abutting ring, the bottom of the containing groove of the front mold plate is further provided with a let-in recess, the panel is provided with a mounting hole, the mounting hole comprises a first hole section and a second hole section which are communicated, the first hole section is located at the front end of the second hole section, and the hole diameter of the first hole section is greater than that of the second hole section, the first end of the limiting rod is provided with an abutting cap which is limited in the first hole section, the second end of the limiting rod penetrates through the second hole section and the sprue push block and extends into the let-in recess, the abutting ring is arranged in the let-in recess and fixed at the second end of the limiting rod, and when the panel and the front mold plate are attached, the abutting cap and the second hole section are arranged at a distance, and / or the abutting ring and the sprue push block are arranged at a distance.

4. The forward die assembly of claim 3, wherein: The second end of the limiting rod is provided with a connecting hole, and the front mold assembly further comprises a fixed connecting piece, the fixed connecting piece penetrates through the abutting ring and is fixed in the connecting hole of the limiting rod, so as to fix the abutting ring at the second end of the limiting rod.

5. The forward die assembly of claim 4, wherein: The connecting hole is a screw hole, and the fixed connecting piece is a bolt which is screwed and fixed in the connecting hole.

6. The forward die assembly of claim 1, wherein: The front mold plate comprises a front mold frame plate and a front mold panel, a front-rear through mounting window is formed in the middle of the front mold frame plate, the front mold panel is fixed in the mounting window of the front mold frame plate, and the containing groove and the feeding channel are arranged on the front mold panel; the rear side of the front mold panel away from the panel is provided with an injection molding surface constituting an injection cavity.

7. The forward die assembly of claim 6, wherein: The front mold frame plate is provided with a containing recess on the rear side away from the panel, and the mounting window is located in the containing recess.

8. The forward die assembly of claim 6, wherein: The front side surfaces of the front mold frame plate and the front mold panel are provided with fixed blocks, the fixed blocks simultaneously fix the front mold frame plate and the front mold panel, and the panel is provided with a let-in recess for accommodating the fixed blocks.

9. The forward die assembly of claim 8, wherein: The fixed blocks are fixedly connected with the front mold frame plate and the front mold panel through two groups of fastening bolts respectively.

10. An injection mold characterized by: The front mold assembly at least comprises the front mold assembly of any one of the preceding claims 1 to 9.

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