Inner mold structure of gas pipe coating mold

Abstract

The utility model belongs to the technical field of extrusion molding processing dies, and particularly relates to an inner die structure of a gas pipe coating die, which comprises an inner die main body, the inner die main body comprises an inner die head, and the inner die head comprises a first extrusion side wall and a second extrusion side wall; the first extrusion side wall and the second extrusion side wall are obliquely arranged, and the inclination angle of the first extrusion side wall is larger than that of the second extrusion side wall; and one port, far away from the first extrusion side wall, of the second extrusion side wall is an extrusion port. According to the utility model, the angle of the die head of the inner die is changed, so that the direction of an extruded material is changed, the coating force of the coating layer is improved, the corrugated pipe is coated more tightly, and the small sawteeth are arranged on the inner wall of the coating layer, so that the coating force is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion processing molds, in particular to an inner mold structure of a gas pipe covering mold. Background Art

[0002] Normally, a PVC coating is wrapped on the outside of the gas pipe (or other wrapped products), and the PVC coating is melted by heating in a plastic coating machine, and extruded outward through a mold (inner and outer molds are matched), and then wrapped with the corrugated pipe. However, the tightness of the extruded coating and the gas pipe (or other wrapped products) is very loose, and it is easy for the coating to loosen or even detach due to a gap between the coating and the gas pipe. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problems existing in the background technology, and for this purpose, an inner mold structure of a gas pipe covering mold is provided.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An inner mold structure of a gas pipe covering mold comprises an inner mold body, the inner mold body comprises an inner mold die head, the inner mold die head comprises a first extrusion side wall and a second extrusion side wall;

[0006] The first extrusion side wall and the second extrusion side wall are both inclined, and the inclination angle of the first extrusion side wall is greater than the inclination angle of the second extrusion side wall;

[0007] An end of the second extrusion sidewall away from the first extrusion sidewall is an extrusion port.

[0008] The following is a technical solution further defined by the present invention: small serrations are provided on the second extruded side wall along its circumferential direction.

[0009] The following is a technical solution further defined by the present invention: the inclination angle of the second extruded side wall is a, and 0<a≤5°, the inclination angle of the first extruded side wall is b, and 0<b≤15°.

[0010] Compared with the prior art, the utility model has the following technical effects:

[0011] The utility model changes the direction of the extruded material by changing the angle of the inner die head, thereby improving the covering force of the covering layer, covering the corrugated pipe more tightly, and further providing small serrations so that the inner wall of the covering layer has small serrations, further improving the covering force.

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic cross-sectional structure diagram of the inner mold structure in the utility model;

[0015] Figure 2 It is a structural schematic diagram of the port surface of the second extrusion side wall in the utility model.

[0016] Reference numerals: 1. first extruded side wall; 2. second extruded side wall; 3. small serrations. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0018] In the description of the present invention, it should be understood that the terms "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0020] like Figure 1As shown, an inner mold structure of a gas pipe covering mold is provided, and the extruded side wall on the outer side of the inner mold structure cooperates with the extruded side wall on the inner side of the outer mold structure, so as to extrude the melted PVC outward and then cover it with the corrugated tube. It should be noted that the extruded side wall on the outer side of the inner mold structure is related to the inner side wall structure of the PVC covering layer, and the inner side wall of the PVC covering layer cooperates with the corrugated tube, so the inner mold structure is improved; and the extruded side wall on the inner side of the outer mold structure is related to the outer side wall structure of the PVC covering layer, and the outer side wall of the PVC covering layer does not cooperate with the corrugated tube, so the outer mold structure is not improved, and the outer mold structure is a prior art. In this embodiment, the outer mold structure is not described in detail.

[0021] like Figure 1 As shown, the inner mold structure includes an inner mold body, the inner mold body includes an inner mold die head, and the inner mold die head includes a first extrusion sidewall 1 and a second extrusion sidewall 2. Both the first extrusion sidewall 1 and the second extrusion sidewall 2 are sidewalls outside the inner mold structure.

[0022] The first extrusion side wall 1 has an inclination angle of 15°, and the second extrusion side wall 2 has an inclination angle of 5°. The melted PVC is extruded from the extrusion port through two sections of inclined extrusion side walls (the first extrusion side wall 1 and the second extrusion side wall 2), changing the direction of the extrusion material so that the PVC coating layer covers the corrugated pipe more tightly.

[0023] like Figure 2 As shown, small serrations 3 are provided along the circumferential direction of the port of the second extruded side wall 2, so that the inner wall of the extruded PVC coating layer has small serrations 3, which can better grasp the corrugated tube and further enhance the coating force.

[0024] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the utility model without departing from the content of the technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. An inner mold structure of a gas pipe covering mold, characterized in that: It comprises an inner mold body, the inner mold body comprises an inner mold die head, and the inner mold die head comprises a first extrusion side wall (1) and a second extrusion side wall (2); The first extruded side wall (1) and the second extruded side wall (2) are both arranged to be inclined, and the inclination angle of the first extruded side wall (1) is greater than the inclination angle of the second extruded side wall (2); An end of the second extrusion side wall (2) away from the first extrusion side wall (1) is an extrusion port.

2. The inner mold structure of the gas pipe covering mold according to claim 1, characterized in that: The second extruded side wall (2) is provided with small saw teeth (3) along its circumferential direction.

3. The inner mold structure of the gas pipe covering mold according to claim 1, characterized in that: The inclination angle of the second extruded side wall (2) is a, and 0<a≤5°, and the inclination angle of the first extruded side wall (1) is b, and 0<b≤15°.

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