Double-thread die core seat suitable for plastic extrusion equipment

Abstract

The utility model relates to the technical field of die core seats, in particular to a double-thread die core seat suitable for plastic extrusion equipment, which comprises a die core seat body, a thread bushing is in threaded connection with the die core seat body, a die core is in threaded connection with the right end of the thread bushing 2, and a lock catch is clamped on the end face of the die core seat body and the end face of the thread bushing. Four first grooves are uniformly distributed in the section of a die orifice of the die core seat body, and second grooves matched with the first grooves in position are uniformly distributed in the right end surface of the threaded sleeve; protrusions embedded with the first groove and the second groove are evenly distributed on the left end face of the lock catch. The mold core seat has the beneficial effects that the use efficiency of the mold core seat is improved, the service life of the mold core seat is prolonged, the cost is reduced, and the economic loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mould core seat, especially to a double thread mould core seat suitable for extrusion equipment. BACKGROUND

[0002] In the wire and cable industry, due to the production of many different specifications of cables, various large-scale extrusion equipment of different models will be applied, and different specifications of molds need to be frequently replaced for each equipment in the production process. However, in large equipment, the mold core itself is relatively heavy, and it is inevitable to cause a certain degree of wear to the threads of the mold core and the mold core seat during the loading and unloading process. Moreover, there are relatively more mold core specifications for the same equipment, and the wear is very slight. In comparison, the wear of the mold core seat is irreversible. Over time, the thread diameter of the mold core seat will continue to wear and become larger, eventually causing thread failure and making the mold core difficult to install. Therefore, the mold core seat has to be replaced. However, the original mold core seat is intact except for the damaged threads, and there is no reasonable equipment for secondary utilization. Therefore, it can only be scrapped, resulting in resource waste and high cost of purchasing a new mold core seat. SUMMARY

[0003] In order to solve the defects in the prior art, the utility model provides a double thread mould core seat suitable for extrusion equipment, so as to improve the use efficiency of the mould core seat, prolong the service life of the mould core seat, reduce the cost, and reduce the economic loss.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A double thread mould core seat suitable for extrusion equipment, characterized in that it comprises a mould core seat body 1, a threaded sleeve 2 is threadedly connected to the mould core seat body 1, a mould core 4 is threadedly connected to the right end of the threaded sleeve 2, and a lock catch 3 is jointly arranged on the end faces of the mould core seat body 1 and the threaded sleeve 2.

[0006] Four first grooves are uniformly arranged on the die opening section of the mould core seat body 1, and the right end face of the threaded sleeve 2 is uniformly provided with second grooves 201 matched with the positions of the first grooves; the left end face of the lock catch 3 is uniformly provided with protrusions 301 matched with the positions of the first grooves and the second grooves 201.

[0007] The shapes of the first grooves 101 and the second grooves 201 are square.

[0008] A first internal thread is arranged in the mould core seat body 1.

[0009] A first external thread matched with the first internal thread is arranged on the outer ring of the threaded sleeve 2, and a second internal thread is arranged on the inner ring of the threaded sleeve 2.

[0010] A second external thread matched with the second internal thread is arranged on the outside of the mould core 4.

[0011] The beneficial effects of this utility model are as follows: it improves the efficiency of mold core holder, extends the service life of mold core holder, reduces costs, and reduces economic losses. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0013] Fig. 2 This is a schematic diagram of the threaded sleeve in this utility model;

[0014] Fig. 3 This is a schematic diagram of the locking mechanism in this utility model.

[0015] In the figure: mold core seat body 1, threaded sleeve 2, lock 3, mold core 4, second groove 201, protrusion 301. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Example 1

[0018] A double-threaded die holder suitable for extrusion equipment, such as Figs. 1-3 As shown, it includes a mold core seat body 1, a threaded sleeve 2 is threadedly connected to the mold core seat body 1, a mold core 4 is threadedly connected to the right end of the threaded sleeve 2, and a locking buckle 3 is jointly engaged on the end faces of the mold core seat body 1 and the threaded sleeve 2.

[0019] The die core body 1 has four first grooves evenly distributed on the die opening cross-section, and the right end face of the threaded sleeve 2 has second grooves 201 that match the positions of the first grooves evenly distributed; the left end face of the latch 3 has protrusions 301 that fit into the positions of the first grooves and the second grooves 201 evenly distributed.

[0020] The first groove and the second groove 201 are square in shape.

[0021] The mold core body 1 has a first internal thread inside.

[0022] The outer ring of the threaded sleeve 2 is provided with a first external thread that matches the first internal thread, and the inner ring of the threaded sleeve 2 is provided with a second internal thread.

[0023] The mold core 4 has a second external thread that matches the second internal thread.

[0024] Example 2

[0025] The working principle of this utility model is as follows:

[0026] 1. First, the mold core body 1 was adjusted, and four square first grooves were machined at the mold opening section of the mold core body 1 to facilitate the subsequent installation of the locking buckle 3.

[0027] 2. Secondly, a double-layer threaded sleeve 2 was added, such as... Fig. 2 As shown. The threaded sleeve 2 has internal and external double threads. The internal thread is assembled with the mold core 4, and the external thread is assembled with the mold core seat body 1. The right end face of the threaded sleeve 2 is also machined with four square second grooves 201, which are the same as the first grooves of the mold core seat, for installing the locking buckle 3. The function of the threaded sleeve 2 is to facilitate replacement. When the internal thread is severely worn, only the threaded sleeve needs to be removed for replacement, without having to replace the entire mold core seat body 1, thus reducing economic costs.

[0028] 3. Finally, a latch 3 was added, such as... Fig. 3 As shown. Its structure is roughly a ring, but four square protrusions are added to one end face of the ring. Their shape just matches the grooves of the mold core body 1 and the threaded sleeve 2. Their function is to limit the rotation of the threaded sleeve 2 and prevent the threaded sleeve 2 from being removed when removing the mold core.

[0029] 4. When using, first install the threaded sleeve 2 on the mold core base body 1 and align the grooves of the two together. Then, align the protrusion of the locking buckle 3 with the groove and install it to lock the threaded sleeve 2 onto the mold core base body 1. Finally, after installing the mold core 4, a self-locking structure is formed, and the locking buckle 3 will not fall off.

[0030] Example 3 Material Selection

[0031] Since the quality of the mold core body 1 is an important factor affecting thread wear, it is necessary to select high hardness and high wear resistance steel as the raw material of the mold. Commonly used mold materials include high-grade nitrided steel, S136 and high-speed steel, etc., and appropriate materials should be selected according to different needs.

[0032] In this invention, the mold core body 1 and the locking buckle 3 are made of high-grade nitriding steel (38CrMoAl). This steel has high surface hardness, wear resistance, and fatigue strength, as well as good heat resistance and corrosion resistance. It has low hardenability and is used to manufacture nitrided parts with high wear resistance, high fatigue strength, and considerable strength, achieving high dimensional accuracy after treatment. The mold material selection requirements are consistent, hence nitriding steel is chosen for the mold. After mold processing, the mold surface needs to be nitrided, with a nitriding layer depth greater than 0.5mm and a post-nitriding hardness (HV) greater than 850. This ensures that the mold core 4 will not deform under prolonged high temperature and pressure, and the mold core opening wall thickness must meet the strength requirements of the operating environment. The surface is then polished to improve the mold's durability.

[0033] The threaded sleeve 2 is made of high-speed steel, which is a tool steel with high hardness, high wear resistance and high heat resistance, good process performance, good strength and toughness, and meets the working environment of the workpiece.

[0034] The above merely describes a preferred specific implementation of the present application, but the scope of protection of the present application is not limited thereto. The substitution can be a substitution of part of the structure, device, method step, or a complete technical solution. According to the technical solution and the inventive concept of the present application, equivalent substitution or change should be covered within the scope of protection of the present application.

Claims

1. A double-threaded die core holder suitable for extrusion equipment, characterized in that, The utility model relates to a double thread mould core seat suitable for extrusion equipment, which comprises a mould core seat body (1), a threaded sleeve (2) threaded on the mould core seat body (1), and a mould core (4) threaded on the right end of the threaded sleeve (2).

2. A twin thread core holder suitable for use in an extrusion apparatus according to claim 1, wherein: The end surface of the mould core seat body (1) and the threaded sleeve (2) are provided with a lock catch (3) in common.

3. A twin thread core holder suitable for use in an extrusion apparatus according to claim 2, wherein: The mould core seat body (1) is provided with four first recesses on the die opening section, and the right end surface of the threaded sleeve (2) is provided with second recesses (201) matching the positions of the first recesses.

4. A twin thread core holder suitable for use in an extrusion apparatus according to claim 1, wherein: The first recesses and the second recesses (201) are square in shape.

5. A twin thread core holder suitable for use in an extrusion apparatus according to claim 1, wherein: The inside of the mould core seat body (1) is provided with a first internal thread. The outer ring of the threaded sleeve (2) is provided with a first external thread matching the first internal thread, and the inner ring of the threaded sleeve (2) is provided with a second internal thread.

6. The double thread mould core seat suitable for extrusion equipment according to claim 1 is characterized in that: The mould core (4) is provided with a second external thread matching the second internal thread on the outside.

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