Integrated extrusion forming die

Abstract

The utility model discloses an integrated extrusion molding die, which comprises an outer cylinder, a core rod and a fastening bolt, the outer cylinder is hollow, an inlet cavity, a flow cavity and a molding cavity are sequentially arranged in the outer cylinder in the flowing direction of a hot melting raw material, the head end of the flow cavity is communicated with the tail end of the inlet cavity, and the tail end of the flow cavity is communicated with the head end of the molding cavity; the core rod is horizontally located in the outer barrel, the central axis of the core rod coincides with the central axis of the outer barrel, and screw holes are symmetrically formed in the upper position and the lower position of the surface of the outer barrel, penetrate through the outer barrel and are communicated with the flowing cavity. According to the utility model, a hot melting raw material flows into the inlet cavity through the inlet of the outer cylinder body, enters the flowing cavity and enters the forming cavity, the forming cavity has a certain length, when the hot melting raw material flows in the forming cavity, the temperature of the hot melting raw material is reduced, and cold water can pass through a pipe fitting and a hose obtained by forming, so that the forming of a pipeline is facilitated; the hot melting raw materials cannot collapse, and the product percent of pass is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline production molds, in particular to an integrated extrusion molding mold. Background Art

[0002] There are many types of plastic molding molds on the market, among which extrusion molds are the main molds used to complete the extrusion molding process. It mainly uses pressure to squeeze the plastic that has been treated by hot melt and other processes into the space between the core mold and the die through the distributor to form it. The design of the mold structure is one of the key influencing factors in plastic extrusion production. A mold with a reasonable structure has good strength, small extrusion force, good stability, large throughput, long life, and high pass rate; many pipelines are also produced through extrusion molding molds.

[0003] After the materials are mixed and hot-melted in the extruder, they enter the molding die to extrude the tube. The hot-melt raw materials pass through the die and are cooled to obtain a molded tube. However, as the mold is used, the temperature of the mold itself will increase. After the hot-melt raw materials pass through the die, since their own temperature does not drop immediately, molding will become more and more difficult, and even problems such as collapse of the hot-melt raw materials may occur.

[0004] In view of the above problems, the present utility model is proposed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an integrated extrusion molding die to solve the problems mentioned in the background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions.

[0007] The utility model provides an integrated extrusion molding die, comprising an outer cylinder, a core rod and a fastening bolt. The outer cylinder is hollow inside, and the flow direction of the hot melt raw material installed inside the outer cylinder is sequentially provided with an entry cavity, a flow cavity and a molding cavity, the head end of the flow cavity is connected to the tail end of the entry cavity, and the tail end of the flow cavity is connected to the head end of the molding cavity;

[0008] The core rod is horizontally located inside the outer cylinder, the center axis of the core rod and the outer cylinder coincide with each other, and screw holes are symmetrically arranged at upper and lower positions on the surface of the outer cylinder, and the screw holes penetrate the outer cylinder and communicate with the flow cavity;

[0009] The fastening bolt is threadedly connected in the screw hole, the front end of the fastening bolt abuts against the core rod, and the length of the fastening bolt is longer than the screw hole;

[0010] A threaded hose is wound around the surface of the outer cylinder near the outlet, and the hose is located on the outer wall of the molding cavity.

[0011] Preferably, the inner diameter of the entrance cavity gradually decreases along the flow direction of the hot-melt raw material, the inner diameter of the flow cavity gradually decreases along the flow direction of the hot-melt raw material, and the inner diameter of the entrance port of the flow cavity is larger than the inner diameter of the exit port of the entrance cavity.

[0012] Preferably, the inner diameter of the molding cavity is constant, and the inner diameter of the molding cavity is equidistant from the sum of the outer diameter of the core rod and the wall thickness of the pipe.

[0013] Preferably, a conical rod head is provided at the front end of the core rod, a circular bottom surface of the rod head is provided at the front end of the core rod, and the rod head is located in the entry cavity.

[0014] Preferably, recessed holes are symmetrically arranged at upper and lower positions on the surface of the core rod, the recessed holes are located directly below the screw holes, and the front end of the fastening bolt abuts against the recessed holes.

[0015] Preferably, the outer surface of the inlet of the outer cylinder is provided with a flange, and a plurality of through holes penetrating the flange are evenly arranged on the flange at equal intervals.

[0016] Preferably, the hose has three to five turns, and the hose is spirally wound around the outer surface of the outer cylinder at the outlet position.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The core rod is located inside the outer cylinder, and two fastening bolts are aligned up and down to fix the core rod inside the outer cylinder. The core rod and the outer cylinder are fixed by fastening bolts, which is convenient for disassembly and assembly, and convenient for daily inspection and maintenance;

[0019] The hot melt raw material flows into the inlet cavity through the inlet of the outer cylinder, and then into the flow cavity. At this time, the hot melt raw material is located between the inner wall of the flow cavity and the core rod. The hot melt raw material enters the molding cavity. The molding cavity has a certain length. When the hot melt raw material flows in the molding cavity, its own temperature is reduced, and a pipe fitting is formed;

[0020] Cold water can flow through the hose, and the flowing cold water can take away the temperature of the outer wall of the molding cavity. When the hot-melt raw material passes through the molding cavity, its own temperature can be rapidly reduced, which is beneficial to the molding of the pipe. The hot-melt raw material will not collapse, and the product qualification rate is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional diagram of the utility model from one angle;

[0022] Figure 2 This is a three-dimensional diagram of the utility model from another angle;

[0023] Figure 3 This is a three-dimensional diagram of the interior of the outer cylinder of the utility model;

[0024] Figure 4 It is a three-dimensional diagram of the core rod of the utility model.

[0025] In the figure: 1, outer cylinder; 11, entry cavity; 12, flow cavity; 13, forming cavity; 14, screw hole; 15, flange; 16, through hole; 2, core rod; 21, rod head; 22, recessed hole; 3, fastening bolt; 4, hose. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] like Figure 1-4 As shown, an integrated extrusion molding die comprises an outer cylinder 1, a core rod 2 and a fastening bolt 3. The outer cylinder 1 is hollow inside, and the hot-melt raw material flows inside the outer cylinder 1. The flow direction of the hot-melt raw material inside the outer cylinder 1 is sequentially provided with an entry cavity 11, a flow cavity 12 and a molding cavity 13. The head end of the flow cavity 12 is connected to the tail end of the entry cavity 11, and the tail end of the flow cavity 12 is connected to the head end of the molding cavity 13.

[0029] The core rod 2 is horizontally located inside the outer cylinder 1, the center axis of the core rod 2 and the outer cylinder 1 coincide with each other, and screw holes 14 are symmetrically arranged on the upper and lower positions of the surface of the outer cylinder 1, and the screw holes 14 penetrate the outer cylinder 1 and communicate with the flow cavity 12;

[0030] The fastening bolt 3 is threadedly connected in the screw hole 14, and the front end of the fastening bolt 3 is against the core rod 2. The length of the fastening bolt 3 is longer than the screw hole 14, that is, the fastening bolt 3 can fix the core rod 2 inside the outer cylinder 1, and when the hot melt raw material flows into the outer cylinder 1, it can pass between the inner wall of the outer cylinder 1 and the core rod 2;

[0031] A threaded hose 4 is wound around the surface of the outer cylinder 1 near its outlet. The hose 4 is located on the outer wall of the molding cavity 13 . Cold water flows through the hose 4 to take away the heat of the outer wall of the molding cavity 13 .

[0032] The inner diameter of the entrance chamber 11 gradually decreases along the flow direction of the hot-melt raw material, and the inner diameter of the flow chamber 12 gradually decreases along the flow direction of the hot-melt raw material. When the hot-melt raw material flows forward in the flow chamber 12, it can move forward at a faster speed. The inner diameter of the entrance of the flow chamber 12 is larger than the inner diameter of the exit of the entrance chamber 11.

[0033] The inner diameter of the molding cavity 13 is constant, and the inner diameter of the molding cavity 13 is equidistant from the sum of the outer diameter of the core rod 2 and the wall thickness of the pipe, that is, the distance between the molding cavity 13 and the core rod 2 is the inner wall of the pipe.

[0034] A conical rod head 21 is provided at the front end of the core rod 2 , which facilitates the molten raw material to enter the outer cylinder 1 . The circular bottom surface of the rod head 21 is provided at the front end of the core rod 2 , and the rod head 21 is located in the entry cavity 11 .

[0035] The surface of the core rod 2 is symmetrically provided with recessed holes 22 at upper and lower positions. The recessed holes 22 are located directly below the screw holes 14 , and the front end of the fastening bolt 3 abuts against the recessed holes 22 .

[0036] A flange 15 is disposed on the outer surface of the inlet of the outer cylinder 1 , and a plurality of through holes 16 penetrating the flange 15 are evenly disposed on the flange 15 at equal intervals.

[0037] The hose 4 has three to five turns, and is spirally wound around the outer surface of the outer cylinder 1 at the outlet.

[0038] In summary: the mandrel 2 is located inside the outer cylinder 1, the two fastening bolts 3 are threadedly connected in the screw holes 14, the front ends of the two fastening bolts 3 are located in the concave holes 22, the two fastening bolts 3 are aligned up and down, the mandrel 2 is fixed inside the outer cylinder 1, the mandrel 2 and the outer cylinder 1 are fixed by the fastening bolts 3, the disassembly and assembly are relatively convenient, and the daily inspection and maintenance are convenient;

[0039] The hot melt material flows into the inlet cavity 11 through the inlet of the outer cylinder 1, and then into the flow cavity 12. At this time, the hot melt material is located between the inner wall of the flow cavity 12 and the core rod 2. As the hot melt material continues to flow forward, the hot melt material enters the molding cavity 13. The molding cavity 13 has a certain length. When the hot melt material flows in the molding cavity 13, its own temperature is reduced, and thus a pipe fitting is formed;

[0040] Cold water can flow through the hose 4, and the flowing cold water can take away the temperature of the outer wall of the molding cavity 13. In this way, when the hot-melt raw material passes through the molding cavity 13, its own temperature can be rapidly reduced, which is beneficial to the molding of the pipeline. The hot-melt raw material will not collapse, and the product qualification rate is higher.

[0041] The above are only preferred specific implementation methods of the utility model, and the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be covered by the protection scope of the utility model.

Claims

1. An integrated extrusion molding die, characterized in that: The invention comprises an outer cylinder (1), a core rod (2) and a fastening bolt (3); the outer cylinder (1) is hollow inside; an inlet cavity (11), a flow cavity (12) and a molding cavity (13) are sequentially arranged inside the outer cylinder (1) in the flow direction of the hot melt raw material; the head end of the flow cavity (12) is connected to the tail end of the inlet cavity (11), and the tail end of the flow cavity (12) is connected to the head end of the molding cavity (13); The core rod (2) is horizontally located inside the outer cylinder (1), the core rod (2) and the central axis of the outer cylinder (1) coincide with each other, and screw holes (14) are symmetrically arranged at upper and lower positions on the surface of the outer cylinder (1), and the screw holes (14) penetrate the outer cylinder (1) and communicate with the flow cavity (12); The fastening bolt (3) is threadedly connected in the screw hole (14), the front end of the fastening bolt (3) abuts against the core rod (2), and the length of the fastening bolt (3) is longer than the screw hole (14); A threaded hose (4) is wound around the surface of the outer cylinder (1) near its outlet, and the hose (4) is located on the outer wall of the molding cavity (13).

2. The integrated extrusion molding die according to claim 1, characterized in that: The inner diameter of the entrance cavity (11) gradually decreases along the flow direction of the hot-melt raw material, the inner diameter of the flow cavity (12) gradually decreases along the flow direction of the hot-melt raw material, and the inner diameter of the entrance of the flow cavity (12) is greater than the inner diameter of the exit of the entrance cavity (11).

3. The integrated extrusion molding die according to claim 1, characterized in that: The inner diameter of the molding cavity (13) is constant, and the inner diameter of the molding cavity (13) is equal to the sum of the outer diameter of the core rod (2) and the wall thickness of the pipe.

4. The integrated extrusion molding die according to claim 1, characterized in that: A conical rod head (21) is arranged at the front end of the core rod (2); the circular bottom surface of the rod head (21) is arranged at the front end of the core rod (2); and the rod head (21) is located in the entry cavity (11).

5. The integrated extrusion molding die according to claim 1, characterized in that: The surface of the core rod (2) is symmetrically provided with recessed holes (22) at upper and lower positions. The recessed holes (22) are located directly below the screw holes (14), and the front end of the fastening bolt (3) abuts against the recessed holes (22).

6. The integrated extrusion molding die according to claim 1, characterized in that: The outer surface of the inlet of the outer cylinder (1) is provided with a flange (15), and a plurality of through holes (16) penetrating the flange (15) are evenly arranged at equal intervals on the flange (15).

7. The integrated extrusion molding die according to claim 1, characterized in that: The hose (4) has three to five turns and is spirally wound around the outer surface of the outer cylinder (1) at the outlet.

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