CN205238507U - Bilayer is crowded tubular product mold machine head altogether - Google Patents

Abstract

The utility model discloses a double-layer co-extruded pipe die head. This double-layer co-extrusion pipe mold head includes the first head body, the shunt bracket and the shunt sleeve which are screwed in turn. The first head body is provided with an inner layer feed port, and a built-in The splitter cone, the tail end of the splitter cone is threadedly connected with a mandrel with internal thread, and the mandrel with internal thread is provided with a straight die; Two machine head bodies, the side wall of the second machine head body is vertically installed with an organic neck, and an outer layer feeding port is opened on the machine neck. The utility model has the advantages of simple structure, reasonable design, small size, convenient installation and disassembly, and is suitable for co-extrusion of double-layer composite pipes. It only needs one processing procedure to make double-layer multi-functional composite pipes, avoiding multi-layer composite pipes. The production process can reduce production consumption.

Description

Double-layer co-extrusion pipe die head

technical field

The utility model relates to the technical field of extruder accessories, in particular to a double-layer co-extruded pipe die head.

Background technique

Pipe is one of the main products produced by extrusion molding, accounting for about 1/4 of the output of extrusion molding products. The extrusion process of pipes is: after the molten plastic is extruded by the extruder, it passes through a porous plate, a filter, and a rotating shunt. The device is divided into several strands by the inner diameter support, and then merged, and finally enters the annular channel formed by the mandrel and the die, and extrudes the continuous pipe. With the rapid development of the economy and the needs of national conditions, the performance of single-layer pipes is far from meeting the needs of production and life. At this time, double-layer composite pipes are urgently needed. The traditional double-layer extruding head has a complex structure, many parts, cumbersome disassembly and maintenance, and cumbersome operation. The flow resistance of molten plastic is large, the cost is high, it cannot meet the production requirements, and its service life is short.

Utility model content

The technical problem to be solved by the utility model is to provide a practical, high-safety, simple and convenient maintenance double-layer co-extruded pipe die head.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a double-layer co-extrusion pipe die head, including the first head body, the shunt bracket and the shunt sleeve which are screwed in turn, and the first head body is provided with There is an inner layer feed port, the cavity formed by the first machine head body, the splitter bracket and the splitter sleeve is built with a splitter cone integrally formed with the splitter bracket, and the tail end of the splitter cone is threaded with a mandrel with an internal thread, and a core with an internal thread The rod overcoat is provided with a straight die; the first machine head body, the shunt bracket, the shunt sleeve and the straight die overcoat are provided with a second machine head body, and the side wall of the second machine head body is vertically installed with an organic neck. An outer layer feed port is provided; the outer layer of the straight die is provided with a die pressure ring that fixes the straight die on the second machine head body; the gap formed between the splitter sleeve and the mandrel with internal thread It is an inner layer flow channel, and the inner layer flow channel communicates with the inner layer feed port, and the gap formed between the shunt sleeve and the second machine head body is an outer layer flow channel, and the outer layer flow channel communicates with the outer layer feed port. The gap between the straight die and the mandrel with internal thread is a forming channel, and both the outer layer flow channel and the inner layer flow channel communicate with the forming channel.

Further, the side walls of the second machine head body and the distribution bracket are provided with air inlets for cooling gas to enter.

Further, grid plates are installed at the inner layer feed inlet and the outer layer feed inlet.

The beneficial effects of the utility model are: the utility model is simple in structure, reasonable in design, small in size, convenient to install and disassemble, suitable for co-extrusion of double-layer composite pipes, and can be made into double-layer multi-functional pipes with only one processing procedure. Composite pipes avoid multi-channel composite production processes, can reduce production consumption, and at the same time help to improve product quality, effectively improve production efficiency and production line output, reduce production costs, and help improve market competition.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Inner layer feed port, 2. First head body, 3. Splitter cone, 4. Splitter sleeve, 5. Second head body, 6. Straight die, 7. Die pressure ring, 8. Mandrel with internal thread, 9. Splitter bracket, 10. Machine neck, 11. Outer layer feed inlet, 12. Air inlet, 13. Inner layer flow channel, 14. Outer layer flow channel.

detailed description

Below in conjunction with accompanying drawing, describe the specific embodiment of the utility model in detail.

A double-layer co-extrusion pipe die head as shown in Figure 1 includes a first head body 2, a shunt bracket 9 and a shunt sleeve 4 that are screwed in sequence, and an inner layer feed is provided on the first head body 2. Port 1, the cavity formed by the first machine head body 2, the shunt bracket 9 and the shunt sleeve 4 has a built-in shunt cone 3 integrally formed with the shunt bracket 9, and the tail end of the shunt cone 3 is threadedly connected with a mandrel 8 with an internal thread. The inner thread mandrel 8 is provided with a straight die 6; the first head body 2, the shunt support 9, the shunt sleeve 4 and the straight die 6 are covered with a second head body 5, and the second head body 5 sides The wall is vertically installed with an organic neck 10, and an outer layer feed port 11 is provided on the machine neck 10; the straight die 6 overcoat is provided with a die pressing ring 7 that fixes the straight die 6 on the second machine head body 5; The gap formed between the sleeve 4 and the mandrel 8 with internal thread is the inner layer flow channel 13, the inner layer flow channel 13 communicates with the inner layer feed port 1, and the gap formed between the shunt sleeve 4 and the second machine head body 5 It is the outer layer flow channel 14, and the outer layer flow channel 14 communicates with the outer layer feed port 11.

The side walls of the second machine head body 5 and the splitter support 9 are provided with air inlets 12 for cooling gas to enter; grid plates are installed at the inner layer feed port 1 and the outer layer feed port 11 .

When working, the inner layer melt enters from the inner layer feed port 1 provided on the first machine head body 2, passes through the splitter cone 3 and enters the inner layer flow channel 13; The outer layer feed port 11 enters the outer layer flow channel 14, and finally extrudes from the forming channel between the straight die 6 and the mandrel 8 with internal thread, and is formed into a finished product by cooling.

This kind of double-layer co-extrusion pipe die head has simple structure, reasonable design, small size, convenient installation and disassembly, and is suitable for co-extrusion of double-layer composite pipes. It can be made into double-layer multi-functional composite pipes only by one process. Pipes avoid multi-channel composite production processes, which can reduce production consumption, and at the same time help to improve product quality, effectively improve production efficiency and production line output, reduce production costs, and help improve market competition.

Claims (3)

1. a double-layer co-extruded pipe die head, characterized in that: comprise the first head body (2), the shunt support (9) and the shunt sleeve (4) that are screwed in turn, the first head body (2 ) is provided with an inner layer feed port (1), and the cavity formed by the first machine head body (2), the shunt bracket (9) and the shunt sleeve (4) has a built-in shunt cone integrally formed with the shunt bracket (9) (3), the tail end of the splitter cone (3) is threadedly connected with a mandrel with internal thread (8), and the mandrel with internal thread (8) is overcoated with a straight die (6); the first machine head body ( 2), the shunt bracket (9), the shunt sleeve (4) and the straight die (6) are provided with a second machine head body (5), and the side wall of the second machine head body (5) is vertically installed with an organic neck (10) , the machine neck (10) is provided with an outer layer feed inlet (11); the said straight die (6) overcoat is provided with a straight die (6) fixed on the second machine head body (5) Mold pressure ring (7); the gap formed between the shunt sleeve (4) and the mandrel with internal thread (8) is the inner layer flow channel (13), the inner layer flow channel (13) and the inner layer feed port (1) connected, the gap formed between the shunt sleeve (4) and the second nose body (5) is the outer layer flow channel (14), and the outer layer flow channel (14) communicates with the outer layer feed port (11) . 2. The double-layer co-extrusion pipe die head according to claim 1, characterized in that: the side walls of the second head body (5) and the splitter bracket (9) are provided with holes for cooling gas to enter air inlet (12). 3. The double-layer co-extrusion pipe die head according to claim 1, characterized in that grid plates are installed at the inner layer feed port (1) and the outer layer feed port (11).