Injection mold of connector for medical surgical robot

Abstract

The utility model provides an injection mold of a connector for a medical surgical robot. The injection mold comprises an upper fixing plate, an upper mold plate, a lower mold plate, a lower fixing plate and a shutter assembly, a stripper plate is arranged on the upper fixing plate, and the stripper plate moves by a certain stroke relative to the upper fixing plate through a first limiting screw and moves by a certain stroke relative to the upper die plate through a second limiting screw; according to the structure of a connector shell to be manufactured, injection molding is carried out in a top glue injection mode, the mold opening sequence is controlled through the first limiting screw, the second limiting screw and the shutter assembly, a material head is taken out firstly, then a product is ejected out, the material head and the product can be separated smoothly, and the injection molding quality of the product is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to injection molds for connectors used in medical surgical robots. Background Technology

[0002] Connector housings are used to assemble connector terminals and achieve mating with other connectors. They not only have certain requirements for the appearance of the injection molded part, but also demand high dimensional and strength qualities. The gate of an injection mold is a short, narrow channel connecting the runner and the cavity; it is the entrance for resin injection into the cavity. The shape, number, size, and location of the gate in the mold have a significant impact on the quality of the plastic part. Therefore, the selection of the gate is one of the key points in plastic mold design.

[0003] For products with small gates and top-mounted injection, there is no need to design complex runner structures. The colloid can be directly injected into the molding cavity, which simplifies the mold manufacturing process to a certain extent and helps to shorten the production cycle. It is suitable for injection molding of connector housings. However, after injection molding, the gate will be connected to the product. How to separate the product and the gate is an urgent problem to be solved. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes an injection mold for a connector used in medical surgical robots.

[0005] The main contents of this utility model include:

[0006] An injection mold for a connector for a medical surgical robot includes an upper mold assembly, a lower mold assembly, a hot runner system, and a molding cavity communicating with the hot runner system;

[0007] The upper mold assembly includes an upper fixing plate and an upper template, and the lower mold assembly includes a lower fixing plate and a lower template; the upper template and the lower template form the molding cavity.

[0008] A stripper plate is provided on the lower surface of the upper fixed plate; a first limiting screw is fixedly connected to the stripper plate, the first limiting screw extends into the upper fixed plate and has a set stroke; a pull pin is provided on the upper fixed plate; the hot runner system includes a main runner and a glue inlet runner communicating with the molding cavity; the pull pin is arranged opposite to the glue inlet runner.

[0009] The stripper plate is also fixedly connected to a second limiting screw, which extends into the upper template and has a set stroke; the upper fixing plate and the lower template are connected by an opening and closing assembly, which is used to control the opening stroke of the upper template and the lower template.

[0010] Preferably, the molding cavity is composed of a concave mold assembly for molding the external shape of the connector housing to be manufactured and a convex mold assembly for molding the internal structure of the connector housing to be manufactured; the concave mold assembly includes an upper mold core disposed in the upper mold plate and an upper mold insert disposed in the upper mold core; the convex mold assembly includes a lower mold core disposed in the lower mold plate and a lower mold insert protruding from the upper surface of the lower mold core;

[0011] The molding cavity is the space between the concave cavity of the upper mold core and the lower mold insert extending into the concave cavity.

[0012] Preferably, the punch assembly further includes a lower die top block disposed on the upper surface of the lower die core.

[0013] Preferably, the lower mold assembly further includes an ejector plate located between the lower fixed plate and the lower template, and the ejector plate is provided with a lower mold ejector rod, a lower mold ejector pin, and a return spring.

[0014] Preferably, the opening and closing device assembly includes a first opening and closing rod and a second opening and closing rod; one end of the first opening and closing rod is rotatably disposed on the lower template, and the other end is movably connected to the upper template; the lower template is provided with an elastic sheet to restrict the other end of the first opening and closing rod from disengaging from the upper template.

[0015] One end of the second opening / closing rod is fixedly connected to the upper fixed plate, and the other end is a free end; a travel limiting rod extends from one side of the first opening / closing rod, and a travel limiting protrusion is provided on the second opening / closing rod; when the upper fixed plate moves to the set travel, the travel limiting rod moves along the travel limiting protrusion so that the other end of the first opening / closing rod separates from the upper template.

[0016] Preferably, the hot runner system further includes a hot runner plate disposed between the upper template and the stripper plate; the hot runner plate has a connecting channel, which is horizontally arranged to connect the main runner and the glue inlet channel.

[0017] Preferably, a female mold guide post is further extended from the upper fixing plate, and a female mold guide sleeve is correspondingly provided on the upper template; the female mold guide post extends into the lower template.

[0018] Preferably, a push plate guide post is further extended from the upper fixing plate; a push plate guide sleeve is correspondingly provided on the stripping plate.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model proposes an injection mold for a connector for a medical surgical robot. According to the structure of the connector housing to be manufactured, top injection molding is adopted. The order of mold opening is controlled by the first limit screw, the second limit screw and the opening and closing device assembly. The sprue is taken out first and then the product is ejected. This not only can the sprue and the product be separated smoothly, but also ensures the injection molding quality of the product. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the injection mold of this utility model;

[0021] Figure 2 for Figure 1 Top view;

[0022] Figure 3 for Figure 2 A cross-sectional view of AA;

[0023] Figure 4 for Figure 2 A cross-sectional view of BB;

[0024] Figure label:

[0025] 10-Upper fixing plate; 11-Upper template; 100-Molding cavity; 12-Upper mold core; 120-Upper mold insert; 13-Stripping plate; 14-First limit screw; 15-Second limit screw; 16-Female mold guide pillar; 17-Female mold guide sleeve; 18-Push plate guide pillar; 19-Push plate guide sleeve;

[0026] 20-Lower fixing plate; 21-Lower template; 22-Lower mold core; 220-Lower mold insert; 23-Lower mold ejector block; 24-Ejector plate; 25-Lower mold ejector rod; 26-Lower mold ejector pin; 27-Reset spring;

[0027] 30-Opener / closer assembly; 31-First opening / closing lever; 310-Travel limit lever; 32-Second opening / closing lever; 320-Travel limit protrusion; 33-Elastic sheet;

[0028] 40 - Hot runner plate; 400 - Main runner; 410 - Connecting runner; 420 - Inlet runner;

[0029] 50 - Pulling needle. Detailed Implementation

[0030] The technical solution protected by this utility model will be described in detail below with reference to the accompanying drawings.

[0031] This invention proposes an injection mold for a connector used in medical surgical robots. By controlling the mold opening sequence, the top gate can be smoothly separated from the product. For details, please refer to... Figure 1 , Figure 3 and Figure 4 The injection mold includes a mating upper mold assembly and a lower mold assembly; wherein, a molding cavity 100 is provided between the upper mold assembly and the lower mold assembly, and a hot runner system is provided inside the upper mold assembly. The colloid is injected from the top of the molding cavity 100 to form the connector housing to be manufactured in the molding cavity. After injection molding is completed, by controlling the mold opening sequence, the gate is first separated from the product, and then the product is ejected, thereby completing the injection molding process.

[0032] In one embodiment, such as Figure 3 As shown, the upper mold assembly includes an upper fixing plate 10 and an upper template 11, and the lower mold assembly includes a lower fixing plate 20 and a lower template 21. An upper mold core 12 is provided below the upper template 11, and the upper mold core 12 has a concave cavity. Correspondingly, a lower mold core 22 is provided above the lower template 21, and the lower mold core 22 has a lower mold insert 220 inserted into the concave cavity. By cooperating with the upper mold insert 120 provided in the upper template, the upper mold core 12 is used to form the external shape of the connector housing to be manufactured, while the lower mold core 22 is used to form the internal structure of the connector housing to be manufactured. The forming cavity 100 is the space between the concave cavity of the upper mold core 12 and the lower mold insert 220 extending into the concave cavity, that is, the product is formed in this space.

[0033] The hot runner system is disposed within the upper fixed plate 10, and a stripper plate 13 is disposed on the lower surface of the upper fixed plate 10. The stripper plate 13 can move relative to the upper fixed plate 10 by a certain stroke through the first limiting screw 14. Specifically, one end of the first limiting screw 14 is fixedly connected to the stripper plate 13, and the other end extends into the limiting groove of the upper fixed plate 10. The limiting groove is opened on the upper surface of the upper fixed plate 10, and its depth is the stroke of relative movement between the stripper plate 13 and the upper fixed plate 10.

[0034] like Figure 4 As shown, a second limiting screw 15 is also fixedly connected to the stripping plate 13. The other end of the second limiting screw 15 extends into the lower template 21. By opening a limiting groove on the lower surface of the lower template 21, the other end of the second limiting screw 15 moves in the limiting groove, thereby controlling the movement stroke between the upper template 11 and the upper fixing plate 10.

[0035] Meanwhile, opening and closing device assemblies 30 are also provided on the two outer walls of the injection mold to control the opening stroke between the upper mold assembly and the lower mold assembly; such as Figure 1As shown, the opening / closing device assembly 30 includes a first opening / closing rod 31 and a second opening / closing rod 32. One end of the first opening / closing rod 31 is rotatably mounted on the lower template 21, and the other end is movably connected to the upper template 12. The lower template 21 is provided with an elastic sheet 33 to restrict the other end of the first opening / closing rod 31 from disengaging from the upper template. One end of the second opening / closing rod 32 is fixedly connected to the upper fixing plate 10, and the other end is a free end, i.e., not fixed to any component, and the free end is provided with a travel limiting protrusion 320. Correspondingly, a travel limiting rod 310 extends from one side of the first opening / closing rod 31. When the upper fixing plate 10 moves to a set travel distance, the travel limiting rod 310 moves along the travel limiting protrusion 320 to separate the other end of the first opening / closing rod 31 from the upper template 11.

[0036] Further, the hot runner system includes a main runner 400 disposed within the upper fixed plate 10, a connecting runner 410 disposed on the hot runner plate 40 between the upper template 11 and the stripper plate 13, and a glue inlet runner 420 communicating with the molding cavity 100; as Figure 3 As shown, the connecting channel 410 is horizontally arranged to connect the main channel 400 and the glue inlet channel 420. A pull pin 50 is also fixedly arranged on the upper fixed plate 10. The pull pin 50 extends above the connection between the connecting channel and the glue inlet channel 420. When the upper fixed plate 10 moves relative to the upper template 11, the pull pin 50 can pull the material head to separate it from the product.

[0037] After injection molding is completed, during the mold opening process, within the stroke range of the lower mold plate 21 and the upper mold plate 11, under the action of the elastic sheet 33, the first opening and closing rod 31 restricts the separation of the upper mold plate 11 and the lower mold plate 21; as the lower mold assembly retracts, the parting surface of the upper mold plate and the upper fixed plate is separated first, and the upper mold plate 11 retracts the stroke of the second limiting screw 15. Under the drive of the pull pin 50, the sprue in the injection channel is pulled out; as the upper mold plate... Following step 11, the stripper plate 13 moves relative to the upper fixed plate 10 by the stroke of the first limiting screw 14, causing the sprue to separate from the pull pin and fall off. Subsequently, the lower mold assembly continues to retract, the opening and closing assembly is opened, and the parting surface of the molding cavity is opened. Then, under the action of the lower mold ejector rod 25 and the lower mold ejector pin 26 on the ejector plate 24 located between the lower fixed plate 20 and the lower mold plate 21, the product is ejected. Finally, under the action of the return spring 27, the mold is reset, waiting for the next injection molding.

[0038] In order to improve the service life of the mold, a lower mold top block 23 is provided on the upper surface of the lower mold core 22. In this embodiment, the lower mold top block 23 can not only prevent the high-temperature colloid from directly contacting the lower mold core, but also ensure the installation stability of the lower mold insert 220 to a certain extent.

[0039] In addition, to ensure alignment during mold opening and closing, a female mold guide post 16 is extended from the upper fixed plate 10, and a female mold guide sleeve 17 is correspondingly provided on the upper template 11; the female mold guide post 16 extends into the lower template 21; a push plate guide post 18 is also extended from the upper fixed plate 10; and a push plate guide sleeve 19 is correspondingly provided on the stripper plate 13.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An injection mold for a connector used in a medical surgical robot, characterized in that, It includes an upper mold assembly, a lower mold assembly, a hot runner system, and a molding cavity connected to the hot runner system; The upper mold assembly includes an upper fixing plate and an upper template, and the lower mold assembly includes a lower fixing plate and a lower template; the upper template and the lower template form the molding cavity. A stripper plate is provided on the lower surface of the upper fixed plate; a first limiting screw is fixedly connected to the stripper plate, the first limiting screw extends into the upper fixed plate and has a set stroke; a pull pin is provided on the upper fixed plate; the hot runner system includes a main runner and a glue inlet runner communicating with the molding cavity; the pull pin is arranged opposite to the glue inlet runner. The stripper plate is also fixedly connected to a second limiting screw, which extends into the upper template and has a set stroke; the upper fixing plate and the lower template are connected by an opening and closing assembly, which is used to control the opening stroke of the upper template and the lower template.

2. The injection mold for the connector for a medical surgical robot according to claim 1, characterized in that, The forming cavity is composed of a concave mold assembly for forming the external shape of the connector housing to be manufactured and a convex mold assembly for forming the internal structure of the connector housing to be manufactured; the concave mold assembly includes an upper mold core disposed in the upper mold plate and an upper mold insert disposed in the upper mold core; the convex mold assembly includes a lower mold core disposed in the lower mold plate and a lower mold insert protruding from the upper surface of the lower mold core. The molding cavity is the space between the concave cavity of the upper mold core and the lower mold insert extending into the concave cavity.

3. The injection mold for the connector for a medical surgical robot according to claim 2, characterized in that, The punch assembly also includes a lower die top block disposed on the upper surface of the lower die core.

4. The injection mold for the connector for a medical surgical robot according to claim 3, characterized in that, The lower mold assembly also includes an ejector plate located between the lower fixed plate and the lower template, and the ejector plate is provided with a lower mold ejector rod, a lower mold ejector pin, and a return spring.

5. The injection mold for the connector for a medical surgical robot according to claim 1, characterized in that, The opening and closing device assembly includes a first opening and closing rod and a second opening and closing rod; one end of the first opening and closing rod is rotatably mounted on the lower template, and the other end is movably connected to the upper template; the lower template is provided with an elastic sheet that restricts the other end of the first opening and closing rod from disengaging from the upper template. One end of the second opening / closing rod is fixedly connected to the upper fixed plate, and the other end is a free end; a travel limiting rod extends from one side of the first opening / closing rod, and a travel limiting protrusion is provided on the second opening / closing rod; when the upper fixed plate moves to the set travel, the travel limiting rod moves along the travel limiting protrusion so that the other end of the first opening / closing rod separates from the upper template.

6. The injection mold for the connector for a medical surgical robot according to claim 1, characterized in that, The hot runner system further includes a hot runner plate, which is disposed between the upper template and the stripper plate; the hot runner plate has a connecting channel, which is horizontally arranged to connect the main runner and the glue inlet channel.

7. The injection mold for the connector of a medical surgical robot according to claim 1, characterized in that, The upper fixing plate is further provided with a female mold guide post, and the upper template is provided with a corresponding female mold guide sleeve; the female mold guide post extends into the lower template.

8. The injection mold for the connector for a medical surgical robot according to claim 1, characterized in that, The upper fixing plate is further provided with a push plate guide post; the stripping plate is provided with a corresponding push plate guide sleeve.

Images