CN212193990U

CN212193990U - Threaded mold core

Info

Publication number: CN212193990U
Application number: CN202020208601.2U
Authority: CN
Inventors: 宋世林; 刘洪生; 施远斌; 魏威
Original assignee: Yaan Fanhua Tooling Mould Co ltd
Current assignee: Yaan Fanhua Tooling Mould Co ltd
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-12-22
Anticipated expiration: 2030-02-25

Abstract

The utility model relates to a mold design makes the field, discloses a threaded core, insert and be used for inserting with the installation of injection mold installation including being used for the fashioned shaping of a plastic thread hole, the shaping is inserted and the installation is inserted fixed connection, and the shaping is inserted and the installation spacing step terminal surface butt joint department of inserting is equipped with the chamfer. The utility model provides a current thread core manufacturing accuracy low, lead to utilizing the fashioned product part outward appearance of thread core, the problem that receives the influence of performance.

Description

Threaded mold core

Technical Field

The utility model relates to a mould manufacturing and designing field specifically indicates a thread core.

Background

The mould is a variety of moulds and tools for obtaining required products by injection moulding, blow moulding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. In short, a mold is a tool used to make a shaped article, the tool being made up of various parts, different molds being made up of different parts. Wherein the injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a process used to mass produce parts of some complex shapes. Specifically, the plastic melted by heating is injected into a mold cavity from an injection molding machine at high pressure, and a formed product is obtained after cooling and solidification.

The main function of the thread core in the injection mold is to form a thread hole on a plastic part or fix an internal thread insert, and the thread core is an essential tool for forming the plastic part with the internal thread. The existing threaded core structure is shown in fig. 1, in the actual manufacturing process of the threaded core in fig. 1, it is found that the mark a in fig. 1 is affected by the limit step structure of the threaded core mounting part, so that the chamfer at the position a can only be processed to C4 at the minimum, and the large chamfer size not only affects the appearance of product parts, but also reduces the thread length and affects the product performance.

SUMMERY OF THE UTILITY MODEL

Based on above technical problem, the utility model provides a threaded core has solved current threaded core manufacturing accuracy and has hanged down, leads to utilizing the fashioned product part outward appearance of threaded core, the problem that receives the influence of performance.

For solving the above technical problem, the utility model discloses a technical scheme as follows:

a threaded core comprises a forming insert for forming a threaded hole of a plastic part and a mounting insert for mounting with an injection mold, wherein the forming insert and the mounting insert are fixedly connected, and a chamfer is arranged at the butt joint of the forming insert and the end face of a limiting step of the mounting insert.

The utility model discloses in, the threaded core that will be overall structure originally divide into the shaping and insert and install two parts of inserting, assemble together after the independent manufacturing of two parts structure and constitute complete threaded core. Because the forming insert of the improved threaded core is not influenced by the limiting step of the mounting insert, the chamfer at the joint of the forming insert and the end face of the limiting step can be smaller, and the limitation that the original chamfer has the minimum size of C4 is broken through. The threaded core has higher processing and manufacturing precision, and the appearance and the performance of the product part formed by utilizing the threaded core are better.

As a preferred mode, the forming insert is provided with a connecting portion, the connecting portion is inserted into a connecting hole of the mounting insert and is pressed and fixed, a through pin hole is formed in the connecting portion and the mounting insert at a corresponding position, and a pin shaft is embedded into the pin hole to connect the forming insert with the mounting insert.

In a preferred form, the chamfer dimension is C1.

Preferably, the end face of the forming insert is provided with a shallow groove, and the lower end part of the forming insert is embedded in the shallow groove.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses an independently made shaping is inserted and the installation is inserted, and it is low to have solved current threaded core manufacturing accuracy, leads to utilizing the fashioned product part outward appearance of threaded core, the problem that receives the influence of performance.

(2) The utility model discloses the shaping is inserted and is equipped with connecting portion, and connecting portion insert the installation and insert that the pressfitting in the connecting hole of establishing is fixed, and connecting portion and installation are inserted corresponding position and are equipped with the pinhole that runs through, and the round pin axle is inserted the shaping and the installation is inserted the connection in the pinhole. The molded plastic part needs to be manually stripped to separate the plastic part from the threaded core, and the forming insert and the mounting insert which are connected together by the pin shaft can provide larger torsional force for the threaded core in the rotating and separating process of the threaded core, so that the phenomenon that the two parts are loosened in the rotating process to influence the stripping operation is avoided.

Drawings

Fig. 1 is a schematic view of a conventional threaded core structure.

Fig. 2 is a structural diagram of the present invention.

Fig. 3 is an assembly diagram of the present invention.

The structure comprises a forming insert 1, a chamfer 101, a connecting part 102, a pin shaft 2, an installation insert 3, a connecting hole 301, a limiting step 302, a shallow groove 303 and a pin hole 4.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example 1:

referring to fig. 2-3, a threaded core comprises a forming insert 1 for forming a threaded hole of a plastic part and a mounting insert 3 for mounting with an injection mold, wherein the forming insert 1 and the mounting insert 3 are fixedly connected, and a chamfer 101 is arranged at the butt joint of the end faces of the limiting steps 302 of the forming insert 1 and the mounting insert 3.

In this example, the threaded core is mainly used for forming a threaded hole in a plastic part, the mounting insert 3 of the threaded core is fixedly mounted with the injection mold, the forming insert 1 of the threaded core is placed in a cavity of the injection mold, and after injection molding, the threaded core is rotated to be separated from the plastic part, so that the plastic part can generate the threaded hole. The chamfer 101 at the end surface butt joint of the limiting step 302 of the forming insert 1 and the mounting insert 3 becomes the chamfer 101 of the end surface of the plastic part threaded hole, and the chamfer 101 can play a role in guiding and protecting the plastic part thread. However, conventional threaded cores are minimally machined to C4 due to the configuration of the stop step 302 of the threaded core mounting portion as shown in fig. 1. The oversize of the chamfer 101 can cause the thread of the threaded hole to be reduced, and the performance of the threaded hole of the plastic part is affected.

The threaded core which is originally of an integral structure is divided into a forming insert 1 and a mounting insert 3, and the two parts of structures are independently manufactured and then assembled together to form the complete threaded core. Because the forming insert 1 of the improved threaded core is not influenced by the limit step 302 of the mounting insert 3, the chamfer 101 at the joint of the forming insert 1 and the end face of the limit step 302 can be smaller, so that the limit that the original minimum size of the chamfer 101 is C4 is broken through, the chamfer 101 can reach the optimal C1, and the size of the chamfer 101 is preferably C1. The threaded core has higher processing and manufacturing precision, and the appearance and the performance of the product part formed by utilizing the threaded core are better.

Further, the forming insert 1 is provided with a connecting portion 102, the connecting portion 102 is inserted into a mounting hole formed in the mounting portion and is pressed and fixed, a pin hole 4 is formed in a position corresponding to the connecting and mounting insert 3, and a pin shaft 2 is embedded into the pin hole 4 to connect the forming insert 1 and the mounting insert 3. The molded plastic part needs to be manually stripped to separate the plastic part from the threaded core, and the forming insert 1 and the mounting insert 3 which are connected together by the pin shaft 2 can provide larger torsional force for the threaded core in the rotating and separating process of the threaded core, so that the phenomenon that the two are loosened in the rotating process to influence the stripping operation is avoided.

Furthermore, the end face of the forming insert 3 is provided with a shallow groove 303, and the lower end part of the forming insert 1 is embedded in the shallow groove 303. Therefore, the forming insert 1 is partially sunk into the shallow groove 303, the gap between the mounting hole and the forming insert 1 can be reduced, and the connection stability of the mounting hole and the forming insert 1 is better.

The embodiment of the present invention is the above. The above embodiments and the specific parameters in the embodiments are only for the purpose of clearly showing the verification process of the utility model, and are not used to limit the patent protection scope of the utility model, the patent protection scope of the utility model is still subject to the claims, all the equivalent structural changes made by using the contents of the specification and the drawings of the utility model are included in the protection scope of the utility model.

Claims

1. A threaded core, characterized by: the injection molding die comprises a molding insert (1) for molding a threaded hole of a plastic part and a mounting insert (3) for mounting with an injection mold, wherein the molding insert (1) and the mounting insert (3) are fixedly connected, and a chamfer (101) is arranged at the butt joint of the end faces of a limiting step (302) of the molding insert (1) and the mounting insert (3).

2. A threaded core according to claim 1, characterized in that: the forming insert (1) is provided with a connecting part (102), the connecting part (102) is inserted into a connecting hole (301) formed in the mounting insert (3) and is pressed and fixed, a through pin hole (4) is formed in the corresponding position of the connecting part (102) and the mounting insert (3), and a pin shaft (2) is embedded into the pin hole (4) to connect the forming insert (1) with the mounting insert (3).

3. A threaded core according to any one of claims 1 or 2, characterized in that: the chamfer (101) has a dimension of C1.

4. A threaded core according to any one of claims 1 or 2, characterized in that: the end face of the mounting insert (3) is provided with a shallow groove (303), and the lower end part of the forming insert (1) is embedded into the shallow groove (303).