Extruder head for pipe machining

Abstract

The utility model discloses a kind of extruder head for pipe processing, it is related to the technical field of polymer processing equipment, including base, the base is sequentially provided with distribution part, pre-processing layer and forming tube along axial direction, the distribution part includes sleeve, outer layer spiral body is fixedly arranged in the sleeve, inner layer spiral body is fixedly arranged in the outer layer spiral body inner layer, outer layer spiral groove is formed between the sleeve and outer layer spiral body, inner layer spiral groove is formed between the outer layer spiral body and the inner layer spiral body, a plurality of through holes are formed on the outer layer spiral body, the through hole is communicated between the outer layer spiral groove and inner layer spiral groove, feeding port is formed on the sleeve, the feeding port is communicated with the through hole, solve the problem that homogeneousness of pipe is affected in prior art by directly forming processing through the transmission of two layers of flow channel when adding melt into head.

Description

Technical Field

[0001] This utility model relates to the technical field of polymer material processing equipment, specifically an extruder head for pipe processing. Background Technology

[0002] Corrugated pipes are widely used in buried drainage, sewage and cable duct laying, etc. The corrugated pipe processing requires the use of an extruder head for forming and extrusion.

[0003] The existing die head processing method involves pressurized liquid plastic flowing through different raw material inlets into the outer material flow channel between the outer jacket and the outer spiral sleeve, and the inner material flow channel between the outer jacket and the inner spiral sleeve. After being transported and dispersed through multiple flow channels, it is finally extruded from its respective outlets to form the outer and inner walls of the pipe. Simultaneously, there is a compressed air outlet between the outer and inner wall extrusion ports to inflate the space between the inner and outer walls. After the pipe blank enters the corrugated pipe forming equipment via blow molding, the inner pipe blank is stretched along the outer circumference of the sizing sleeve and bonded to the outer pipe blank to form a hollow double-walled corrugated pipe.

[0004] In existing technologies, the melt is generally added to the die head and directly formed through the transfer of two flow channels, which affects the uniformity of the pipe and thus easily affects the quality of the pipe. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an extruder head for pipe processing to solve the problem in the prior art where the melt is added to the die head and directly formed through the transmission of two flow channels, which affects the uniformity of the pipe.

[0006] To achieve the above objectives, this utility model proposes an extruder head for pipe processing, comprising a base. A distribution section, a pre-processing layer, and a forming tube are sequentially arranged along the axial direction on the base. The distribution section includes an outer sleeve, an outer spiral body fixedly disposed within the outer sleeve, and an inner spiral body fixedly disposed within the inner layer of the outer spiral body. An outer spiral groove is formed between the outer sleeve and the outer spiral body, and an inner spiral groove is formed between the outer spiral body and the inner spiral body. The outer spiral body has several through holes, and the outer spiral groove and the inner spiral groove communicate through these through holes. A feed inlet is provided on the outer sleeve, and the feed inlet communicates with the through holes.

[0007] As a further embodiment of this utility model: both the outer spiral groove and the inner spiral groove are gradually tapered with decreasing pitch.

[0008] As a further embodiment of this utility model: the outer casing is fixedly connected to the base.

[0009] As a further embodiment of this utility model: one end of the distribution part is closed, and the other end is fixedly connected to the pre-processed layer.

[0010] As a further embodiment of this utility model: the pre-processed layer includes an inner mold, a middle mold, and an outer mold; the outer mold is fixedly connected to the outer jacket, the middle mold is fixedly connected to the outer spiral, and the inner mold is fixedly connected to the inner spiral.

[0011] As a further embodiment of this utility model: an inner flow channel is formed between the inner mold body and the middle mold body, and an outer flow channel is formed between the middle mold body and the outer mold body.

[0012] As a further embodiment of this utility model: the outer material channel is connected to the outer spiral groove, and the inner material channel is connected to the inner spiral groove.

[0013] As a further embodiment of this utility model: the forming tube is fixedly disposed at the end of the pre-processed layer.

[0014] As a further embodiment of this utility model: the forming tube and the pre-processed layer are detachably connected by a threaded connection, and a protective sleeve is fixedly provided at the end of the forming tube.

[0015] As a further embodiment of this utility model: a spiral distributor for driving the flow of melt is provided inside the distribution section, the pre-processing layer and the forming tube, and the end of the spiral distributor extends out of the distribution section and is fixedly connected to a drive motor.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The device is constructed by sequentially arranging a distribution section, a pre-processing layer, and a forming tube along the axial direction on the base. The distribution section pre-distributes the melt, the pre-processing layer pre-forms the tube, and the forming tube further bonds and dries the inner and outer layers of the tube. This enables the extrusion molding of the tube, avoiding uneven tube thickness caused by directly extruding the melt through a multi-layer spiral groove. Furthermore, the forming tube and the pre-processing layer are detachably connected to accommodate extruders of different sizes, enhancing the device's practicality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 Partial cross-sectional view of this utility model Figure 1 ;

[0020] Figure 3 Partial cross-sectional view of this utility model Figure 2 ;

[0021] Figure 4 For the present utility model Figure 3 Enlarged view of point A.

[0022] In the diagram: 1. Base; 2. Outer sleeve; 3. Drive motor; 4. Feed inlet; 5. Through hole; 6. Forming tube; 7. Sheath; 8. Outer spiral groove; 9. Outer spiral body; 10. Spiral distributor; 11. Inner mold body; 12. Middle mold body; 13. Outer mold body; 14. Outer flow channel; 15. Inner flow channel; 16. Inner spiral groove; 17. Inner spiral body. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1-4 As shown, an extruder head for pipe processing includes a base 1. A distribution section, a pre-processing layer, and a forming tube 6 are sequentially arranged along the axial direction on the base 1. The distribution section realizes the pre-distribution of the melt, the pre-processing layer realizes the pre-forming processing of the pipe, and finally the forming tube 6 further realizes the bonding and drying of the inner and outer layers of the pipe.

[0025] The dispensing unit includes an outer casing 2, within which an outer spiral 9 is fixedly disposed. An inner spiral 17 is fixedly disposed within the outer spiral 9. An outer spiral groove 8 is formed between the outer casing 2 and the outer spiral 9, and an inner spiral groove 16 is formed between the outer spiral 9 and the inner spiral 17. Several through holes 5 are provided on the outer spiral 9, and the outer spiral groove 8 and the inner spiral groove 16 are connected through the through holes 5. Both the outer spiral groove 8 and the inner spiral groove 16 are gradually tapered with decreasing pitch. An inlet is provided on the outer casing 2. The feed inlet 4 is connected to the through hole 5. The melt is injected through the feed inlet 4 and then splits into the outer spiral groove 8 and the inner spiral groove 16 through the through hole 5, so that the melt is subjected to the shear rate gradient, which is beneficial for speed control and reduces the unevenness of the tube wall thickness. The outer sleeve 2 is fixedly connected to the base 1. One end of the distribution part is closed and the other end is fixedly connected to the pre-processed layer. The closed section is specifically designed with stepped shoulders on the inner / outer spiral body, which are interference fit with the groove of the die head body. Graphite sealing rings are added to the end face to facilitate the disassembly of each component.

[0026] The pre-processed layer includes an inner mold 11, a middle mold 12, and an outer mold 13. The outer mold 13 is fixedly connected to the outer sleeve 2, the middle mold 12 is fixedly connected to the outer spiral 9, and the inner mold 11 is fixedly connected to the inner spiral 17. An inner flow channel 15 is formed between the inner mold 11 and the middle mold 12, and an outer flow channel 14 is formed between the middle mold 12 and the outer mold 13. The outer flow channel 14 is connected to the outer spiral groove 8, and the inner flow channel 15 is connected to the inner spiral groove 16. The melt flowing out through the outer spiral groove 8 and the inner spiral groove 16 enters the outer flow channel 14 and the inner flow channel 15, pre-forming the inner and outer layers of the pipe, avoiding vibration caused by the decreasing thread structure, increasing the uniformity of the melt, and facilitating subsequent molding processing.

[0027] The forming tube 6 is fixedly installed at the end of the pre-processed layer. Specifically, the forming tube 6 and the pre-processed layer are detachably connected by a threaded connection. The forming tube 6 is existing technology, which makes it easy to replace the forming tube 6 and process tubes of different sizes.

[0028] A sheath 7 is fixedly provided at the end of the forming tube 6. A spiral distributor 10 for driving the flow of melt is provided in the distribution section, the pre-processing layer and the forming tube 6. The end of the spiral distributor 10 extends out of the distribution section and is fixedly connected to a drive motor 3. The spiral distributor 10 is driven to work by the drive motor 3.

[0029] Working principle:

[0030] The melt is injected through the feed inlet 4, and the screw distributor 10 is driven by the drive motor 3 to transport the melt. The melt is divided into streams through the through hole 5 and enters the outer spiral groove 8 and the inner spiral groove 16. The melt flowing out through the outer spiral groove 8 and the inner spiral groove 16 enters the outer flow channel 14 and the inner flow channel 15, and finally is formed and extruded through the forming tube 6.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An extruder head for pipe processing, characterized in that, The system includes a base (1), on which a distribution section, a pre-processing layer and a forming tube (6) are arranged sequentially along the axial direction. The distribution section includes an outer sleeve (2), in which an outer spiral body (9) is fixedly arranged, and an inner spiral body (17) is fixedly arranged inside the outer spiral body (9). An outer spiral groove (8) is formed between the outer sleeve (2) and the outer spiral body (9), and an inner spiral groove (16) is formed between the outer spiral body (9) and the inner spiral body (17). The outer spiral body (9) has several through holes (5), and the outer spiral groove (8) and the inner spiral groove (16) are connected through the through holes (5). The outer sleeve (2) has a feed inlet (4), which is connected to the through holes (5).

2. The extruder head for pipe processing according to claim 1, characterized in that, Both the outer spiral groove (8) and the inner spiral groove (16) are gradually tapered with decreasing pitch.

3. The extruder head for pipe processing according to claim 1, characterized in that, The outer cover (2) is fixedly connected to the base (1).

4. The extruder head for pipe processing according to claim 1, characterized in that, One end of the distribution section is closed, and the other end is fixedly connected to the pre-processed layer.

5. The extruder head for pipe processing according to claim 4, characterized in that, The pre-processed layer includes an inner mold (11), a middle mold (12), and an outer mold (13); the outer mold (13) is fixedly connected to the outer jacket (2), the middle mold (12) is fixedly connected to the outer spiral (9), and the inner mold (11) is fixedly connected to the inner spiral (17).

6. The extruder head for pipe processing according to claim 5, characterized in that, An inner flow channel (15) is formed between the inner mold (11) and the middle mold (12), and an outer flow channel (14) is formed between the middle mold (12) and the outer mold (13).

7. The extruder head for pipe processing according to claim 6, characterized in that, The outer material channel (14) is connected to the outer spiral groove (8), and the inner material channel (15) is connected to the inner spiral groove (16).

8. The extruder head for pipe processing according to claim 1, characterized in that, The forming tube (6) is fixedly disposed at the end of the pre-processed layer.

9. The extruder head for pipe processing according to claim 8, characterized in that, The forming tube (6) is detachably connected to the pre-processed layer by a threaded connection, and a sheath (7) is fixedly provided at the end of the forming tube (6).

10. The extruder head for pipe processing according to claim 1, characterized in that, The distribution section, pre-processing layer and forming tube (6) are provided with a spiral distributor (10) for driving the flow of melt. The end of the spiral distributor (10) extends out of the distribution section and is fixedly connected to a drive motor (3).

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