Core mold assembly of extruder

Abstract

The utility model discloses a core mold assembly of an extruder, which belongs to the technical field of core molds of extruders and comprises a core mold base, a shaping needle and a fastener, the shaping needle is fixed in the core mold base by the fastener, a first through hole for the shaping needle to pass through is arranged in the front end of the core mold base, and a second through hole for the shaping needle to pass through is arranged in the rear end of the core mold base. A second through hole for a fastener to pass through is formed in the shaping needle, the first through hole is communicated with the second through hole, the inner diameter of the second through hole is larger than that of the first through hole, a limiting column is arranged at the rear end of the shaping needle, and the limiting column is arranged in the second through hole and fixed through the fastener. According to the core mold assembly of the extruder, the core mold base and the shaping needle are arranged to be of a split structure, so that the shaping needle is convenient to replace, and materials are saved; and the shaping needle is inserted into the core mold base, so that an inner hole of a processed product is not easy to be eccentric and deviated from the wall, and the yield is high.

Description

Technical Field

[0001] The utility model relates to the technical field of core molds of extruders, in particular to a core mold assembly of an extruder. Background Art

[0002] The core mold is installed in the barrel of the extruder and is used to process and prepare Teflon tubes. The existing core mold assembly includes a base and a shaping pin, and the shaping pin is welded to the base. During processing, the product is prone to eccentricity and wall deviation; therefore, a new core mold assembly for an extruder is urgently needed to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a core mold assembly of an extruder to solve the technical problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a core mold assembly of an extruder, comprising a core mold base, a shaping pin and a fastener, wherein the fastener fixes the shaping pin in the core mold base, a first through hole for the shaping pin to pass through is provided at the front end of the core mold base, a second through hole for the fastener to pass through is provided at the rear end of the core mold base, the first through hole is connected to the second through hole, and the inner diameter of the second through hole is larger than the inner diameter of the first through hole, a limiting column is provided at the rear end of the shaping pin, the limiting column is provided in the second through hole and fixed by the fastener.

[0005] Preferably, the front end of the core mold base is conical and the rear end is cylindrical.

[0006] Preferably, the outer wall surface of the rear end of the core mold base is provided with an external thread, and the inner wall surface is provided with an internal thread.

[0007] Preferably, the diameter of the limiting column is larger than the diameter of the shaping needle, larger than the inner diameter of the first through hole, and smaller than the inner diameter of the second through hole.

[0008] Preferably, the shaping needle is made of plastic material, such as TORLON 4203.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The core mold assembly of the extruder mainly includes a core mold base, a shaping needle and a fastener. The core mold assembly is installed in the barrel of the extruder as a whole, wherein the core mold base plays a fixing role, and the shaping needle is installed in the core mold base through the fastener. The shaping needle is used for processing and forming the inner hole of the Teflon tube. By setting the core mold base and the shaping needle as a split structure, it is convenient to replace the shaping needle. The shaping needle is inserted into the core mold base to ensure that the inner hole of the processed product is not easy to be eccentric or deviate from the wall, and the yield rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0012] Figure 1 It is a three-dimensional structural schematic diagram of a core mold assembly of an extruder of the utility model;

[0013] Figure 2 The utility model is a schematic cross-sectional structure diagram of a core mold base of a core mold assembly of an extruder.

[0014] Explanation of the reference numerals: 1. core mold base; 11. first through hole; 12. second through hole; 13. external thread; 2. shaping needle; 21. limiting column; 3. fastener. DETAILED DESCRIPTION

[0015] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0016] See also Figure 1-2 The utility model provides a technical solution: a core mold assembly of an extruder, comprising a core mold base 1, a shaping needle 2 and a fastener 3, wherein the fastener 3 fixes the shaping needle 2 in the core mold base 1, and the front end of the core mold base 1 is provided with a first through hole 11 for the shaping needle 2 to pass through, and the rear end of the core mold base 1 is provided with a second through hole 12 for the fastener 3 to pass through, the first through hole 11 is communicated with the second through hole 12, and the inner diameter of the second through hole 12 is larger than the inner diameter of the first through hole 11, and the rear end of the shaping needle 2 is provided with a limiting column 21, which is arranged in the second through hole 12 and fixed by the fastener 3.

[0017] The utility model discloses a core mold assembly of an extruder, which mainly comprises a core mold base 1, a shaping needle 2 and a fastener 3. The core mold assembly is integrally mounted on the upper part of the barrel of the extruder, wherein the core mold base 1 plays a fixing role, and the shaping needle 2 is mounted in the core mold base 1 through the fastener 3. The shaping needle 2 is used for processing and forming the inner hole of a Teflon tube. The fastener 3 is a screw, a bolt or other fastening accessory, which is used for locking and fixing the shaping needle 2. By arranging the core mold base 1 and the shaping needle 2 as a split structure, it is convenient to replace the shaping needle 2. Furthermore, when the shaping needle 2 needs to be replaced, the shaping needle can be directly screwed out without wasting materials.

[0018] The traditional core mold assembly is a welded one-piece structure. When it needs to be replaced, the core mold base 1 and the shaping needle 2 need to be replaced together, which wastes materials. In addition, the shaping needle 2 is directly welded to the core mold base 1, which is prone to eccentricity when processing extruded products. The rear end of the shaping needle 2 of the present application is inserted into the interior of the core mold base 1, so it is not easy to be eccentric or deviate from the wall when extruding products.

[0019] In a preferred embodiment, referring to Figure 1 and Figure 2 The front end of the core mold base 1 of the core mold assembly is conical, and the rear end is cylindrical. The outer wall surface of the rear end of the core mold base 1 is provided with an external thread 13, and the inner wall surface is provided with an internal thread. The front end of the core mold base 1 is set to be conical, which is compatible with the front end of the barrel. When in use, the rear end is screwed and fixed in the barrel through the external thread 13, and the inner wall surface of the rear end of the core mold base 1 is provided with an internal thread to facilitate the fastener 3 to be screwed into the second through hole 12.

[0020] In a preferred embodiment, referring to Figure 1 and Figure 2 The diameter of the limiting column 21 of the core mold assembly is larger than the diameter of the shaping needle 2, and larger than the inner diameter of the first through hole 11, and smaller than the inner diameter of the second through hole 12. The limiting column 21 defines the installation position of the shaping needle 2, ensuring that it is fixed in the second through hole 12 and does not pass through the first through hole 11. At the same time, it is also convenient for installation, disassembly, and replacement.

[0021] In a preferred embodiment, referring to Figure 1 The shaping needle of the core mold assembly is made of plastic material, which is TORLON 4203. The shaping needle is made of plastic material, but its hardness can reach the level of steel. The diameter of the shaping needle determines the diameter of the inner hole of the pipe.

[0022] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A core mold assembly for an extruder, characterized in that: It includes a core mold base, a shaping needle and a fastener, wherein the fastener fixes the shaping needle in the core mold base, the front end of the core mold base is provided with a first through hole for the shaping needle to pass through, the rear end of the core mold base is provided with a second through hole for the fastener to pass through, the first through hole is connected to the second through hole, and the inner diameter of the second through hole is larger than the inner diameter of the first through hole, and the rear end of the shaping needle is provided with a limiting column, the limiting column is provided in the second through hole and fixed by the fastener.

2. The core mold assembly of the extruder according to claim 1, characterized in that: The front end of the core mold base is conical, and the rear end is cylindrical.

3. The core mold assembly of the extruder according to claim 1, characterized in that: The outer wall surface of the rear end of the core mold base is provided with an external thread, and the inner wall surface is provided with an internal thread.

4. The core mold assembly of the extruder according to claim 1, characterized in that: The diameter of the limiting column is larger than the diameter of the shaping needle, larger than the inner diameter of the first through hole, and smaller than the inner diameter of the second through hole.

5. The core mold assembly of the extruder according to claim 1, characterized in that: The shaping needle is made of plastic material, namely TORLON 4203.

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