Inner die of extrusion molding die

Abstract

The utility model provides an inner mold of an extrusion mold. The inner mold comprises an inner mold body, the inner mold body is sequentially divided into a connecting head part, a guiding part and a shaping part from right to left; an exhaust hole is formed in the inner mold body; a heating tube is further included; the exhaust hole is formed in the left part in the inner mold body; a heating tube mounting hole is formed in the right part in the inner mold body; a horn hole is formed in the middle in the inner mold body; the outer diameter of the horn hole is gradually increased from left to right; the left end of the horn hole is communicated with the exhaust hole, and the right end is communicated with the heating tube mounting hole; the inner wall of the heating tube mounting hole is provided with a plurality of exhaust concave parts which are concave towards the outer side; the heating tube is inserted into the heating tube mounting hole; a gap is reserved between the left end of the heating tube and the horn hole to form a vent for gas to pass through; the exhaust concave part is communicated with the horn hole through the air vent; according to the design, the defect that holes of produced pipes are blocked due to the fact that residual glue is hung on the wall can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of extrusion mold technology, and in particular to an inner mold for extrusion molds. Background Technology

[0002] Currently, plastic pipes are formed using extrusion molds, which consist of an inner mold and an outer mold. In traditional molds, during operation, the end of the inner mold will gradually accumulate glue. After accumulating to a certain extent, the residual glue on the inner mold will be carried out with the pipe, causing defects such as pipe blockage and affecting water flow. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this invention is to provide an inner mold for extrusion molding to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An extrusion mold inner mold includes an inner mold body; the inner mold body is divided into a connecting head, a guiding part, and a shaping part from right to left; the inner mold body has an vent hole inside; it also includes a heating element; the vent hole is formed in the left part of the inner mold body; the right part of the inner mold body has a heating element mounting hole; the middle part of the inner mold body has a flared hole; the outer diameter of the flared hole gradually increases from left to right; the left end of the flared hole communicates with the vent hole, and the right end communicates with the heating element mounting hole; the inner wall of the heating element mounting hole has several outwardly recessed venting recesses; the heating element is inserted into the heating element mounting hole; a gap is reserved between the left end of the heating element and the flared hole to form a vent for gas to pass through; the venting recesses and the flared hole communicate through the vent.

[0006] In a further description of this utility model, the exhaust recess is provided in four parts and is evenly distributed around the circumference.

[0007] As further described in this utility model, the exhaust recess is a U-shaped groove structure.

[0008] As further described in this utility model, the outer wall of the connecting head is provided with external threads.

[0009] In a further description of this utility model, the outer wall of the guide portion is a conical structure with an outer diameter that gradually decreases from right to left.

[0010] The beneficial effects of this utility model are as follows:

[0011] This design incorporates a heating element mounting section within the inner mold body for installing the heating element. During operation, the heating element heats the inner mold body, melting the adhesive and preventing residual adhesive accumulation. This effectively solves the problem of pipe blockage during production. Furthermore, in this design, air inside the mold can be discharged through the air holes in the inner mold, then sequentially through the vent hole, air outlet, and exhaust recess, without affecting the exhaust effect and ensuring the processing quality of the product. Attached Figure Description

[0012] Figure 1 This is an overall structural diagram of the present invention;

[0013] Figure 2 This is the front view of this utility model;

[0014] Figure 3 yes Figure 2 Sectional view of AA. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] like Figure 1-3 As shown, an extrusion mold inner mold includes an inner mold body 1; the inner mold body 1 is divided into a connecting head 11, a guiding part 12, and a shaping part 13 from right to left; the inner mold body 1 has an vent 101 inside; it also includes a heating tube 2; the vent 101 is formed in the left part of the inner mold body 1; the right part of the inner mold body 1 has a heating tube mounting hole 102; the middle part of the inner mold body 1 has a flared hole 103; the outer diameter of the flared hole 103 gradually increases from left to right; the left end of the flared hole 103 communicates with the vent 101, and the right end communicates with the heating tube mounting hole 102; the inner wall of the heating tube mounting hole 102 has a plurality of outwardly recessed venting recesses 104; the heating tube 2 is inserted into the heating tube mounting hole 102; A vent 105 is formed between the left end of the heating tube 2 and the horn hole 103 to allow gas to pass through; the exhaust recess 104 is connected to the horn hole 103 through the exhaust recess 105; this design provides a heating tube 2 mounting part in the inner mold body 1 for installing the heating tube 2. The heating tube 2 is connected to an external circuit and powered. During operation, the heating tube 2 can heat the inner mold body 1, heating up to melt the colloid and prevent residual glue accumulation, thereby effectively solving the problem of tube blockage in production. Moreover, in this design, air in the mold can enter through the air hole in the inner mold, then be guided and diffused through the horn hole 103, and then discharged from the exhaust recess 104 after passing through the exhaust port 105, without affecting the exhaust effect and ensuring the processing quality of the product.

[0017] The exhaust recesses 104 are provided in four and are evenly distributed around the circumference. The exhaust recesses 104 in this design are U-shaped groove structures. The four exhaust recesses 104 divide the inner wall of the heating tube mounting hole 102 into four arc-shaped walls, and the heating tube 2 is pressed tightly by the four arc-shaped walls.

[0018] The outer wall of the connecting head 11 is provided with external threads 111 for easy assembly.

[0019] The outer wall of the guide portion 12 is a conical structure with an outer diameter that gradually decreases from right to left, which serves to guide the extruded material.

[0020] The shaping section 13 is a shaping tube.

[0021] The above description does not limit the technical scope of this invention. Any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this invention shall still fall within the scope of the technical solution of this invention.

Claims

1. An inner mold for extrusion molding, comprising an inner mold body; the inner mold body being divided from right to left into a connecting head, a guiding part, and a shaping part; the inner mold body having venting holes inside; characterized in that: It also includes a heating element; the vent is formed in the left part of the inner mold body; the right part of the inner mold body is provided with a heating element mounting hole; the middle part of the inner mold body is provided with a horn hole; the outer diameter of the horn hole gradually increases from left to right; the left end of the horn hole is connected to the vent, and the right end is connected to the heating element mounting hole; the inner wall of the heating element mounting hole is provided with several outwardly recessed venting recesses; the heating element is inserted into the heating element mounting hole; a gap is reserved between the left end of the heating element and the horn hole to form a vent for gas to pass through; the venting recesses and the horn hole are connected through the vent.

2. The inner mold of an extrusion die according to claim 1, characterized in that: The exhaust recesses are provided in four places and are evenly distributed around the circumference.

3. The inner mold of an extrusion die according to claim 1, characterized in that: The exhaust recess has a U-shaped groove structure.

4. The inner mold of an extrusion die according to claim 1, characterized in that: The outer wall of the connector head is provided with external threads.

5. The inner mold of an extrusion die according to claim 1, characterized in that: The outer wall of the guide portion is a conical structure with an outer diameter that gradually decreases from right to left.

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