CN220052814U - Spiral body structure of pipe extrusion die - Google Patents
Spiral body structure of pipe extrusion die Download PDFInfo
- Publication number
- CN220052814U CN220052814U CN202321694622.XU CN202321694622U CN220052814U CN 220052814 U CN220052814 U CN 220052814U CN 202321694622 U CN202321694622 U CN 202321694622U CN 220052814 U CN220052814 U CN 220052814U
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- spiral groove
- handed
- handed spiral
- screw
- extrusion die
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- 238000001125 extrusion Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 41
- 230000004927 fusion Effects 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 2
- 229920005672 polyolefin resin Polymers 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a spiral body structure of a pipe extrusion die, and belongs to the technical field of pipe extrusion molding. It comprises the following steps: the spiral body is provided with a left-handed spiral groove and a right-handed spiral groove on the surface, the left-handed spiral groove and the right-handed spiral groove are arranged in a crossing way and are provided with a shared feed inlet at the starting point, materials enter and are split into the left-handed spiral groove and the right-handed spiral groove from the feed inlet, and the materials in the left-handed spiral groove and the materials in the right-handed spiral groove are extruded and fused at any intersection point and split to flow forwards again. As the material continues to move forward, extrusion fusion and dispersion will occur at each intersection point, thereby continuously improving the mixing degree of the polyolefin resin in the preliminary mixing stage, providing a good basis for subsequent full extrusion mixing, thereby effectively playing the role of reducing or even eliminating the spiral line of the inner wall of the pipe, and further ensuring the quality of the pipe produced subsequently.
Description
Technical Field
The utility model belongs to the technical field of pipe extrusion molding, and particularly relates to a spiral body structure of a pipe extrusion die.
Background
In the pipe molding process, molten materials need to enter a screw body of a die after being extruded from an extruder, and then flow into the die body after being extruded and fused by the screw body and are extruded and molded outwards.
At present, a spiral body of a die is often only provided with a unidirectional spiral groove, molten materials flow along the unidirectional spiral groove and flow into a die body after preliminary mixing, in the process, the materials flow in each unidirectional spiral groove one by one, a certain temperature difference exists between each material, shrinkage degree of each material is inconsistent in the subsequent cooling process, a spiral line is generated on the inner wall of a pipe, the spiral line is unqualified in the current standard, and therefore, how to effectively lighten or even eliminate the spiral line on the inner wall of the pipe is a problem to be solved urgently at present.
Disclosure of Invention
The utility model provides a spiral body structure of a pipe extrusion die, which can effectively lighten or even eliminate the spiral line on the inner wall of a pipe.
The utility model can be realized by the following technical scheme:
a spiral structure of a pipe extrusion die, comprising:
the spiral body is provided with a left-handed spiral groove and a right-handed spiral groove on the surface, the left-handed spiral groove and the right-handed spiral groove are arranged in a crossing way and are provided with a shared feed inlet at the starting point, materials enter from the feed inlet and flow into the left-handed spiral groove and the right-handed spiral groove, and the materials in the left-handed spiral groove and the materials in the right-handed spiral groove can be extruded and fused at any one crossing point and flow forwards in a flow splitting way again.
As a further improvement of the utility model, any intersection point of the left-handed spiral groove and the right-handed spiral groove is provided with a diamond-shaped boss, and two materials are extruded and fused and split again when flowing to the position of the diamond-shaped boss along the left-handed spiral groove and the right-handed spiral groove.
As a further development of the utility model, the end of the screw is provided with a feed channel for connection to an external extruder.
As a further improvement of the utility model, the feed inlets are provided with a plurality of feed inlets and are annularly arranged on the surface of the spiral body, each feed inlet is communicated with the feed channel, and the materials are dispersed into each feed inlet after entering from the feed channel.
As a further improvement of the utility model, any one of the feed inlets is connected with one of the left-handed spiral grooves and one of the right-handed spiral grooves.
As a further improvement of the utility model, as the material moves forward along the left-handed helical flute and the right-handed helical flute, the material creates a squeeze fusion and split at each intersection.
As a further improvement of the utility model, the distances from the bottoms of the left-handed spiral groove and the right-handed spiral groove to the center line of the spiral body gradually increase from the feed inlet to the front.
As a further improvement of the utility model, the cross-sectional areas of the left-handed spiral groove and the right-handed spiral groove gradually decrease from the feed inlet to the front.
Compared with the prior art, the utility model has the following beneficial effects:
1. the surface of the spiral body is provided with a left-handed spiral groove and a right-handed spiral groove which are intersected, materials enter from a feed inlet and are split into the left-handed spiral groove and the right-handed spiral groove, and then in the forward flowing process, the materials are extruded and fused at each intersection point, so that the mixing degree of polyolefin resin in the primary mixing stage is continuously improved, and a good foundation is provided for extrusion molding of subsequent pipes;
2. the materials are dispersed again after extrusion and fusion at the crossing points, so that the effect of reducing or even eliminating the spiral line of the inner wall of the pipe is effectively achieved, and the quality of the pipe produced subsequently is further ensured;
3. the distance between the bottoms of the left-handed spiral groove and the right-handed spiral groove and the central line of the spiral body is gradually increased from the feed inlet, and meanwhile the sectional areas of the left-handed spiral groove and the right-handed spiral groove are gradually reduced from the feed inlet, so that the extrusion force applied to the left-handed spiral groove and the right-handed spiral groove is continuously increased along with the continuous forward flowing process of materials, the mixing degree of polyolefin resin is further improved, and the materials are ensured to be formed by preliminary extrusion when entering the die body at the front end.
Drawings
FIG. 1 is a schematic structural view of a screw structure of a pipe extrusion die of the present utility model;
FIG. 2 is a cross-sectional view of the helical structure of the pipe extrusion die of the present utility model;
fig. 3 is a schematic diagram showing the distribution of left-handed and right-handed helical grooves after partial expansion of the screw body according to the present utility model.
In the figure, 100, the screw; 110. a left-handed helical groove; 120. a right-handed helical groove; 130. a feed inlet; 140. an intersection; 150. a diamond-shaped boss; 160. a feed channel.
Detailed Description
The following are specific embodiments of the present utility model and the technical methods of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
As shown in fig. 1 to 3, the present utility model provides a screw structure of a pipe extrusion die, comprising:
the spiral body 100 is provided with a left-handed spiral groove 110 and a right-handed spiral groove 120 on the surface, the left-handed spiral groove 110 and the right-handed spiral groove 120 are arranged in a crossing way and are provided with a shared feed inlet 130 at the starting point, materials enter from the feed inlet 130 and are split into the left-handed spiral groove 110 and the right-handed spiral groove 120, and the materials in the left-handed spiral groove 110 and the materials in the right-handed spiral groove 120 can be extruded and fused at any crossing point 140 and split forward again;
specifically, the left-handed spiral groove 110 and the right-handed spiral groove 120 are provided with a plurality of cross points 140, materials are firstly shunted into the left-handed spiral groove 110 and the right-handed spiral groove 120 after entering from the feeding port 130, and then extrusion fusion is generated at each cross point 140 in the forward flowing process, so that the mixing degree of polyolefin resin in the primary mixing stage is continuously improved, and a good foundation is provided for extrusion molding of subsequent pipes;
each time the material is extruded and fused at the intersection 140, the material is dispersed again, so that the temperature of the material flowing forward along the surface of the spiral body 100 is more uniform, thereby effectively reducing or even eliminating the spiral line of the inner wall of the pipe, and further ensuring the quality of the pipe produced subsequently.
Preferably, any intersection 140 of the left-handed spiral groove 110 and the right-handed spiral groove 120 is formed with a diamond-shaped boss 150, and two materials flow along the left-handed spiral groove 110 and the right-handed spiral groove 120 to the diamond-shaped boss 150 to meet when being extruded and blended, so that the mixing degree is improved, and then the two materials are split along the edge of the diamond-shaped boss 150.
Preferably, the end of the screw body 100 is provided with a feeding channel 160, and the feeding ports 130 are provided with a plurality of feeding ports and are annularly arranged on the surface of the screw body 100, and each feeding port 130 is communicated with the feeding channel 160, that is, the material is dispersed into each feeding port 130 for feeding after entering from the feeding channel 160;
further, each of the feeding ports 130 is communicated with one of the left-handed spiral grooves 110 and one of the right-handed spiral grooves 120, so that the disposable material is dispersed into a plurality of strands, and the strands of material are extruded, melted and dispersed continuously in the forward flowing process along the left-handed spiral grooves 110 and the right-handed spiral grooves 120, so that the mixing degree of the polyolefin resin is improved continuously, and the spiral line of the inner wall of the pipe is lightened.
Preferably, the distances from the bottoms of the left-handed spiral grooves 110 and the right-handed spiral grooves 120 to the central line of the spiral body 100 are gradually increased from the feeding port 130, and meanwhile, the sectional areas of the left-handed spiral grooves 110 and the right-handed spiral grooves 120 are gradually reduced from the feeding port 130, so that the extrusion force applied to the materials is continuously increased along with the continuous forward flowing process of the materials, the mixing degree of the polyolefin resin is further improved, and the materials are ensured to be preliminarily extruded and molded when entering the die body at the front end.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, and also comprises the technical scheme formed by any combination of the technical features. The foregoing is a specific embodiment of the utility model, it will be appreciated by those skilled in the art that modifications and variations may be made without departing from the principles of the utility model, and such modifications and variations are to be regarded as being within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
Claims (8)
1. A spiral body structure of a pipe extrusion die, comprising:
the spiral body is provided with a left-handed spiral groove and a right-handed spiral groove on the surface, the left-handed spiral groove and the right-handed spiral groove are arranged in a crossing way and are provided with a shared feed inlet at the starting point, materials enter from the feed inlet and flow into the left-handed spiral groove and the right-handed spiral groove, and the materials in the left-handed spiral groove and the materials in the right-handed spiral groove can be extruded and fused at any one crossing point and flow forwards in a flow splitting way again.
2. The spiral body structure of a pipe extrusion die according to claim 1, wherein a diamond-shaped boss is formed at any intersection of the left-handed spiral groove and the right-handed spiral groove, and two materials are extruded and fused and split again when flowing to the location of the diamond-shaped boss along the left-handed spiral groove and the right-handed spiral groove.
3. The screw structure of a pipe extrusion die according to claim 1, wherein the end of the screw is provided with a feed channel for connection with an external extruder.
4. A screw structure of a pipe extrusion die according to claim 3, wherein said feed openings are provided in a plurality and are arranged in a ring shape on the surface of said screw, each of said feed openings being in communication with said feed channel, and material being dispersed into each of said feed openings after entering from said feed channel.
5. The spiral body structure of a pipe extrusion die according to claim 1, wherein any one of the feed inlets is connected with one of the left-handed spiral grooves and one of the right-handed spiral grooves.
6. The screw structure of a pipe extrusion die of claim 5 wherein the material creates a pinch fusion and split at each intersection as the material moves forward along the left-handed and right-handed screw grooves.
7. The screw structure of a pipe extrusion die according to claim 1, wherein the distance from the bottoms of the left-handed screw and the right-handed screw to the center line of the screw is gradually increased from the feed port forward.
8. The screw structure of a pipe extrusion die according to claim 1, wherein the cross-sectional areas of the left-handed screw and the right-handed screw gradually decrease from the feed port forward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321694622.XU CN220052814U (en) | 2023-06-29 | 2023-06-29 | Spiral body structure of pipe extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321694622.XU CN220052814U (en) | 2023-06-29 | 2023-06-29 | Spiral body structure of pipe extrusion die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220052814U true CN220052814U (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321694622.XU Active CN220052814U (en) | 2023-06-29 | 2023-06-29 | Spiral body structure of pipe extrusion die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220052814U (en) |
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2023
- 2023-06-29 CN CN202321694622.XU patent/CN220052814U/en active Active
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