CN206242461U - A kind of two layers of coextru-lamination pipe mold - Google Patents

Abstract

The utility model discloses a two-layer co-extruded composite pipe die, which comprises an axial connector and a radial connector connected to the discharge port of an extruder, and is characterized in that the discharge port of the axial connector is There is a splitter cone, and an outer layer of fluid is provided behind the splitter cone, and an inner flow channel and a spiral outer flow channel are provided on the outer layer of fluid; the inner flow channel communicates with the mandrel, and the outlet of the radial connector passes through the spiral type. The outer runner communicates with the core mold through the rear mold body; the core mold outlet is provided with an inner wall adjustment device, and the rear mold body is equipped with an outer wall adjustment device. The mold body is easy to manufacture and the precision is easy to control; the work is stable during pipe forming, and the mold life is long, and the double-layer co-extrusion tube embryo is completed at one time, with high production efficiency; The thickness is uniform, and the finished product has high structural strength.

Description

A two-layer co-extruded composite pipe die

technical field

The utility model relates to the technical field of pipeline manufacturing, in particular to a two-layer co-extruded composite pipe mold.

Background technique

Double-layer composite pipe is favored by customers for its high pressure resistance, strong aging resistance, anti-bacteria, anti-oxygen and other functions, and its manufacturing methods and devices are also various. For example, the patent publication number is CN104669582A, which discloses a double-layer composite pipe and its co-extrusion die, a preparation method, and a round pipe splicing honeycomb panel and its preparation method, wherein the co-extrusion die includes a die seat, a guide grate, and a ventilator , the first machine head, the splitter cone, the end cover and the second machine head, the right end surface of the first machine head is provided with an annular first buffer tank and an annular second buffer tank, and the left end surface of the end cover is attached to the second On the right end surface of a machine head, the first buffer cavity is formed by the left end surface of the end cover and the first buffer groove, and the second buffer cavity is formed by the left end surface of the end cover and the second buffer groove; When the pressure is released, the outer layer material slowly flows out from the first forming channel, and through the adhesion of the outer layer material itself, it is continuously coated on the inner pipe fitting, and an outer layer with a thickness of 0.01 to 0.03mm can be formed on the inner pipe fitting. layer material layer. Another example is the patent announcement number CN204700266U, which relates to a double-layer composite pipe mold. The two ends of the left raceway are respectively welded and fixed to the first outer cylinder section and the second outer cylinder section, and the second outer cylinder section is connected to the left end of the right raceway. Welding fixed, the end of the right raceway is welded and fixed with the third outer cylinder section, interference fit in the inner hole of the first outer cylinder section, left raceway, second outer cylinder section, right raceway and third outer cylinder section There is an inner cylinder section; the third outer cylinder section and the right end of the inner cylinder section are welded and fixed to the end plate, and the left ends of the first outer cylinder section and the inner cylinder section are welded and fixed to the flange. Another example is a double-layer composite pipe head with the patent notification number CN202412660U, which includes a compression plate, a die, a head body, a mandrel, a shunt sleeve, a shunt bracket, a shunt, a compartment shunt sleeve, and an inner layer connection. The two ends of the head body are connected with a compression plate and an inner connector, the outer wall of the head body near the inner connector is provided with an outer connector, and both inner and outer connectors are provided with a filter. There is a flow-blocking mandrel at the center axis of the machine head body, one end of the flow-blocking mandrel is connected to the mandrel, and the other end is connected to the shunt through threads, and the connection between the mandrel, the flow-blocking mandrel and the shunt and the machine head body A cavity is formed between them, and the mouth die, splitter sleeve, interlayer splitter sleeve and diverter support are connected in sequence and located in the cavity, and the outer wall of the end of the blocking mandrel near the diverter is provided with an annular boss.

Contents of the invention

The purpose of this utility model is to provide a two-layer co-extrusion composite pipe mold with reasonable structure, co-extruded tube blanks can be completed once in the same pair of molds, the double-layer tube blanks are completely fused together, the structure is tight, and the work is stable.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: a two-layer co-extruded composite pipe die, including an axial joint and a radial joint connected to the discharge port of the extruder, and its The feature is that the discharge port of the axial connector is provided with a splitter cone, behind the splitter cone is an outer layer of fluid, and the outer layer of fluid is provided with an inner flow channel and a spiral outer flow channel; wherein the inner flow channel and the core The molds are connected, and the outlet of the radial connector is connected with the core mold through the spiral outer flow channel through the rear mold body; the core mold outlet is equipped with an inner wall adjustment device, and the rear mold body is equipped with an outer wall adjustment device.

The device designed in this technical scheme is connected with two single-screw extruders, the inner pipe extruder is opened first, the processed material enters from the axial joint, enters the splitter bracket through the front die body, and divides the fluid along the outer layer The flow in the inner runner reaches the core mold and the die to form the inner tube embryo. At the same time, the other extruder is turned on, and the material enters from the radial joint of the outer pipe inlet, flows through the spiral flow channel of the outer layer, flows to the rear die body, and finally converges to the matching part of the die and core die, forming Outer tube embryo. This device can adjust the extrusion volume of the inner and outer layer extruders separately to achieve the extrusion speed and wall thickness required for pipe making, and then produce pipe products that meet the process requirements through cooling and vacuum sizing in the next process.

As a preference, the outlet end of the axial connector is provided with a front mold body, and the outlet end of the front mold body is provided with an inner taper hole matched with the splitter cone. The parts of the device are divided into two parts, are easy to process and manufacture, and can ensure the precision requirements of the mold itself.

Preferably, the splitter cone is fixed at one end of the splitter bracket, and the other end of the splitter bracket is connected to the outer layer split fluid. Constitutes a continuous low-resistance flux flow channel.

Preferably, the rear mold body is installed outside the outer layer of the fluid; the outer wall adjustment device is located outside the rear mold body, and several adjusting bolts are provided along the radial direction of the pipeline forming and traveling direction. Easy to adjust and operate to ensure uniform wall thickness.

As a preference, a die is provided in the discharge direction of the core die, and the core die and the die cooperate with each other and have discharge channels with diameters that decrease from large to small. The diameter reduction process is a necessary measure to ensure the quality of pipe forming.

As a preference, the inner wall adjustment device is located on the outside where the die and the core die cooperate with each other, and the die is also provided with a connecting flange.

As a preference, at least one diameter reduction port is provided in the inner flow channel of the outer sub-fluid.

The beneficial effects of the utility model are: the division of labor of each component is clear, the structure is tight and finely matched with each other, the mold body is convenient to manufacture, and the precision is easy to control; the work is stable when the pipe is formed, and the mold has a long life, and the double-layer co-extrusion tube blank is completed once , high production efficiency; the blanks are interpenetrating and fused, strong crack resistance, easy to control the diameter reduction, uniform wall thickness, and high structural strength of the finished product.

Description of drawings

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

In the figure: 1. Connecting flange, 2. Mold, 3. Inner wall adjustment device, 4. Mandrel, 5. Radial connector, 6. Outer wall adjustment device, 7. Outer part fluid, 8. Rear mold body , 9. Splitter bracket, 10. Splitter cone, 11. Front mold body, 12. Axial connector, 13. Heating ring.

detailed description

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

A kind of two-layer co-extruded composite pipe mold of the present embodiment, as shown in Figure 1, its one end is provided with the axial connector 12 that is connected with a single-screw extruder outlet, and is provided with on the mold body and The radial connector 5 connected to the outlet of another single-screw extruder.

The outlet end of the axial connection head 12 is connected with the front mold body 11, and the end of the front mold body 11 towards the outlet is provided with an inner cone hole from small to large, and the inner cone hole cooperates with the diverter cone 10; the diverter cone 10 is fixed on the distribution bracket 9, the distribution bracket 9 has a material flow channel, the distribution bracket 9 is connected with the outer layer of the fluid 7, and the outer layer of the fluid 7 is provided with an inner flow channel and a spiral outer flow channel, wherein the inner flow channel passes through a The diameter reduction port at the center communicates with the core mold 4; the feed port end of the spiral outer runner is connected with the discharge port of the radial connector 5, and the outlet end of the spiral outer runner leads to the core mold 4 through the rear mold body 8.

The rear mold body 8 is provided with an outer wall adjustment device 6. The specific installation method is: the rear mold body 8 is installed outside the outer layer of the fluid 7, the outer wall adjustment device 6 includes an adjustment bolt, and the outer wall adjustment device 6 is installed on the rear mold body 8. On the outside, 6 pieces of adjusting bolts are evenly distributed along the radial direction of the pipe forming running direction.

The discharge direction of the mandrel 4 is provided with a die 2, the mandrel 4 and the die 2 cooperate with each other and have a section of diameter-reduced discharge channel from large to small and a cylindrical discharge channel, and the discharge port of the core die 4 An inner wall adjustment device 3 is provided, and the inner wall adjustment device 3 also includes 6 adjustment bolts, and the 6 adjustment bolts are evenly distributed on the outside of the mold clamping body 8 for micro-adjustment of the die.

A connecting flange 1 is also provided outside the die 2; a heating ring 13 is provided on the entire surface of the die.

When working, the material in the inner layer of the tube enters from the axial connector 12, enters the splitter support 9 through the front mold body 11 and the splitter cone 10, and reaches the matching part of the core mold 4 and the mouth die 2 along the inner flow path of the outer layer splitter fluid 7, forming At the same time, another extruder is turned on, and the outer material of the tube enters from the radial connector 5 at the inlet of the outer tube, passes through the spiral channel of the outer layer fluid 7, flows to the rear mold body 8, and finally Converge to the joint of the die 2 and the core die 4 to form the outer tube embryo, the inner and outer tube layers are fused and then extruded, and then formed after cooling and vacuum sizing in the next process.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any structure after simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (7)

1. A two-layer co-extruded composite pipe die, comprising an axial connector (12) and a radial connector (5) connected to the discharge port of the extruder, characterized in that the axial connector is There is a splitter cone (10) at the feed port, and an outer layer of fluid (7) behind the splitter cone, and an inner flow channel and a spiral outer flow channel on the outer layer of fluid; the inner flow channel and the mandrel (4) The outlet of the radial connector communicates with the mandrel (4) through the rear mold body (8) through the spiral outer flow channel; the inner wall adjustment device (3) is provided at the outlet of the mandrel mold, and the rear mold body is provided with Outer wall adjustment device (6). 2. A two-layer co-extruded composite pipe mold according to claim 1, characterized in that the outlet end of the axial connector (12) is provided with a front mold body (11), and the front mold body discharges The mouth end is provided with an inner cone hole matched with the splitter cone (10). 3. A two-layer co-extruded composite pipe mold according to claim 1 or 2, characterized in that the splitter cone (10) is fixed at one end of the splitter bracket (9), and the other end of the splitter bracket is connected to the outer layer Distributor (7). 4. A two-layer co-extruded composite pipe mold according to claim 1 or 2, characterized in that the rear mold body (8) is installed outside the outer layer of the fluid (7); the outer wall adjustment device (6) It is located outside the rear mold body and is provided with several adjusting bolts along the radial direction of the pipe forming walking direction. 5. A two-layer co-extruded composite pipe mold according to claim 1, characterized in that the core mold (4) is provided with a die (2) in the discharge direction, and the core die and the die cooperate with each other and have From large to small shrinking discharge channel. 6. A two-layer co-extruded composite pipe die according to claim 5, characterized in that the inner wall adjustment device (3) is located outside the mouth die (2) and the core die (4) that cooperate with each other, and the mouth die The part is also provided with a connecting flange (1). 7. A two-layer co-extruded composite pipe die according to claim 1 or 2 or 5 or 6, characterized in that the inner flow channel of the outer layer fluid (7) is provided with at least one diameter reduction port.