CN217319230U - Pipe co-extrusion die capable of independently adjusting wall thickness - Google Patents
Pipe co-extrusion die capable of independently adjusting wall thickness Download PDFInfo
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- CN217319230U CN217319230U CN202220658248.7U CN202220658248U CN217319230U CN 217319230 U CN217319230 U CN 217319230U CN 202220658248 U CN202220658248 U CN 202220658248U CN 217319230 U CN217319230 U CN 217319230U
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Abstract
The utility model discloses a but co-extrusion mould of tubular product of independent control wall thickness relates to tubular product shaping technical field, has solved the eccentric big problem of crowded tubular product production wall thickness altogether, has reduced off-centre when having improved the inside and outside wall thickness homogeneity of tubular product, and the concrete scheme is as follows: the die comprises a first die body, a second die body and a third die body which are coaxially arranged and fixedly connected in sequence, wherein an eccentric inner embedded ring is arranged at the joint of the first die body and the second die body, and a pressing plate is fixedly arranged at one end of the first die body, which is far away from the second die body; the first die body is composed of a first core die, a second core die and a first outer die which are coaxially arranged, the first core die is located inside the second core die, the second core die is located inside the first outer die, one ends of the second core die and the first outer die are fixedly arranged on the pressing plate, the first core die is connected with the first outer die and the second core die through first eccentric bolts, and one end, close to the pressing plate, of the first core die is abutted to fastening bolts arranged on the pressing plate.
Description
Technical Field
The utility model belongs to the technical field of the tubular product shaping technique and specifically relates to a but tubular product coextrusion mould of independent control wall thickness.
Background
The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.
In recent years, the market demands for pipes (made of PE, PVC and the like) do not require pressure bearing singly, but develop in a diversified way, for example, the inner wall is required to be made of an antibacterial material and a wear-resistant material or the inner wall and the outer wall are required to be in two colors, so that the appearance of a co-extrusion die is caused.
The inventor finds that the feeding positions of the two extruders are different, the properties of used raw materials are different, the actual temperatures of the inner layer and the outer layer are different, the wall thickness of the inner layer and the wall thickness of the outer layer of the produced pipe are often uneven, and the production cost is increased; on the other hand, in order to ensure the minimum wall thickness of the inner layer and the outer layer of the pipe, the eccentricity of the pipe is increased, and therefore the subsequent welding quality of the pipe is affected.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art existence, the utility model aims at providing a but tubular product coextrusion mould of independent control wall thickness, through the adjustment alone to inside and outside layer mould, solved current crowded tubular product production wall thickness off-centre big problem altogether.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
in a first aspect, an embodiment of the utility model provides a tubular product co-extrusion die capable of independently adjusting wall thickness, which comprises a first die body, a second die body and a third die body which are coaxially arranged and fixedly connected in sequence, wherein a junction of the first die body and the second die body is provided with an eccentric inner embedded ring, and one end of the first die body, which is far away from the second die body, is fixedly provided with a pressing plate;
the first die body is composed of a first core die, a second core die and a first outer die which are coaxially arranged, the first core die is located inside the second core die, the second core die is located inside the first outer die, one ends of the second core die and the first outer die are fixedly arranged on the pressing plate, the first core die is connected with the first outer die and the second core die through first eccentric bolts, and one end, close to the pressing plate, of the first core die is abutted to fastening bolts arranged on the pressing plate.
As a further implementation manner, the outer circumferential surface of the first core die is provided with a first spiral fluid channel, a first melt channel is formed between the second core die and the first core die, the first spiral fluid channel is communicated with the first melt channel, and the first spiral fluid channel is connected with an external extruder through a feeding channel.
As a further implementation manner, a second spiral fluid channel is arranged on the outer circumferential surface of the second core mold, a second melt channel is formed between the first outer mold and the second core mold, the second spiral fluid channel is communicated with the second melt channel, and a connector is arranged on the first outer mold and is communicated with the second spiral fluid channel.
As a further implementation manner, the first eccentric bolt is vertically arranged and penetrates through the first outer die and the second core die, and the bottom of the screw of the first eccentric bolt is in contact with the outer surface of the first core die.
As a further implementation manner, the second mold body is provided with a second outer mold, a third core mold is coaxially arranged inside the second outer mold, the second outer mold and the first outer mold are coaxially arranged and fixedly connected, and the third core mold and the first core mold are coaxially arranged and fixedly connected.
As a further implementation manner, a third melt channel is formed between the second outer die and the third core die, the third melt channel is communicated with the first die body, and the third melt channel is conical.
As a further implementation manner, an eccentric inner embedded ring and a second eccentric bolt are arranged at the joint of the second outer die and the first outer die, the second eccentric bolt is vertically arranged and located at the top of the eccentric inner embedded ring, and the bottom of the second eccentric bolt is fixedly connected with the top of the eccentric inner embedded ring.
As a further implementation, the side of the eccentric inner insert ring away from the first outer die is flush with the side of the second core die away from the pressure plate.
As a further implementation manner, the third mold body is provided with a third outer mold, a fourth core mold is arranged inside the third outer mold, a protruding structure is arranged in the middle of the inner surface of the third outer mold, a fourth melt channel is formed between the third outer mold and the fourth core mold, and the fourth melt channel is communicated with the second mold body.
As a further implementation manner, an opening mold is fixedly arranged on one side, away from the second mold body, of the third mold body, a core rod is arranged inside the opening mold, a fifth melt channel is formed between the opening mold and the core rod, the fifth melt channel is communicated with the third mold body, a vertical third eccentric bolt is arranged on the third outer mold, and the bottom of a screw rod of the third eccentric bolt is in contact with the outer surface of the opening mold.
Above-mentioned the utility model has the advantages as follows:
1) the utility model discloses set up first mandrel and carried out the regulation of position through first eccentric bolt, in order to play the purpose that the eccentric is extruded to the regulation tubular product inlayer, the second mandrel is fixed to be set up on the clamp plate, make its position unchangeable all the time, thereby the homogeneity of having guaranteed first fuse-element passageway only is relevant with first mandrel, the homogeneity of having also guaranteed second fuse-element passageway simultaneously only is relevant with first external mold, influence each other when preventing tubular product inlayer wall thickness regulation, when having guaranteed the minimum wall thickness homogeneity of tubular product inlayer, the eccentric grow of tubular product has been avoided.
2) The utility model discloses the second die body has and is conical third fuse-element passageway to can form certain mould compression ratio, the fuse-element can form certain backpressure when passing through third fuse-element passageway, extrude the initial adhesive strength of fuse-element in order to increase the tubular product ectonexine.
3) The utility model discloses one side parallel and level that clamp plate was kept away from to eccentric inner thimble one side of keeping away from first external mold and second mandrel can adjust eccentric inner thimble and axial lead's eccentric degree through adjusting the eccentric bolt of second to reach the eccentric purpose of adjustment tubular product outer wall thickness, can not influence the inlayer eccentric simultaneously.
4) The utility model discloses the middle part position of third external mold internal surface has protruding structure, increase fuse-element pressure that can step forward, and then increases the adhesion strength that the fuse-element was extruded to the outer layer in the tubular product.
5) The utility model discloses the screw rod bottom of third eccentric bolt and the outer surface contact of bush, the bush carries out the eccentric adjustment of the whole wall thickness of tubular product through third eccentric bolt to ensure that the wall thickness of tubular product is even.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a schematic diagram of an overall structure of a co-extrusion die for pipes with individually adjustable wall thicknesses according to one or more embodiments of the present invention;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
wherein, 1, pressing plate; 2. a first eccentric bolt; 3. a first core mold; 4. a first fastening bolt; 5. a first outer mold; 6. a connecting port; 7. a second core mold; 8. a second fastening bolt; 9. a third fastening bolt; 10. a second eccentric bolt; 11. eccentric inner embedded rings; 12. a second outer mold; 13. a third eccentric bolt; 14. a neck ring mold; 15. a third outer mold; 16. a third core mold; 17. a fourth core mold; 18. a feed channel.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As introduced in the background art, because the feeding positions of the two extruders are different, the properties of the used raw materials are different, and the actual temperatures of the inner layer and the outer layer are different, the wall thickness of the inner layer and the wall thickness of the outer layer of the produced pipe are often uneven, so that the production cost is increased on one hand; on the other hand, for guaranteeing inside and outside two-layer minimum wall thickness, tubular product off-centre also can the grow to influence welding quality's problem, for solving above-mentioned problem, the utility model provides a but tubular product coextrusion mould of independent control wall thickness.
Example 1
The utility model discloses an among the typical embodiment, as shown in FIG. 1, provided a tubular product of wall thickness is crowded mould altogether by individual control, include, first die body, second die body, third die body, first die body, second die body and the coaxial setting of third die body and fixed connection in proper order.
The first die body is composed of a first core die 3, a second core die 7 and a first outer die 5 which are coaxially arranged, wherein the first core die 3 is positioned inside the second core die 7, the second core die 7 is positioned inside the first outer die 5, spiral fluid channels are respectively arranged between the core die 7 and the first outer die 5, and the same ends of the first core die 3, the second core die 7 and the first outer die 5 are fixedly arranged on the pressing plate 1.
Specifically, the second core mold 7 is sleeved on the outer side of the first core mold 3, the second core mold 7 and the first core mold 3 are coaxially arranged, a first spiral fluid channel is arranged on the outer circumferential surface of the first core mold 3, a first melt channel is formed between the inner surface of the second core mold 7 and the outer surface of the first core mold 3, the first spiral fluid channel is communicated with the first melt channel, and the first spiral fluid channel is connected with an external extruder through a feeding channel 18;
the first outer die 5 is sleeved on the outer side of the second core die 7, the first outer die 5 and the second core die 7 are coaxially arranged, a second spiral fluid channel is arranged on the outer circumferential surface of the second core die 7, a second melt channel is formed between the inner surface of the first outer die 5 and the outer surface of the second core die 7, and the second spiral fluid channel is communicated with the second melt channel.
The first outer die 5 is provided with a connecting port 6, and the connecting port 6 is vertically arranged, penetrates through the first outer die 5, is communicated with the second spiral fluid channel and is used for connecting the co-extrusion extruder so as to convey the melt into the melt channel between the first outer die 5 and the second core die 7.
One end of the first external mold 5 adjacent to the connecting port 6 is fixedly arranged on the pressure plate 1 through a fastening bolt, and one end of the second core mold 7 on the same side with the first external mold 5 is also fixedly arranged on the pressure plate 1 through a fastening bolt.
Specifically, one end of the first outer die 5, which is adjacent to the connecting port 6, is fixedly arranged on the pressure plate 1 through a third fastening bolt 9; one end of the second core mold 7 on the same side as the first outer mold 5 is fixedly arranged on the pressure plate 1 through a second fastening bolt 8.
Still be equipped with first eccentric bolt 2, fix a position first core mould 3 through first eccentric bolt 2, first eccentric bolt 2 is vertical to be set up to run through first external mold 5 and second core mould 7, the screw rod bottom of first eccentric bolt 2 contacts with the surface of first core mould 3, can adjust the concentricity of first core mould 3 and second core mould 7 through the precession or the back-out of first eccentric bolt 2, in order to reach the purpose of the clearance between adjustment first core mould 3 and the second core mould 7, thereby the extrusion eccentricity of adjustment tubular product inlayer.
One side that first mandrel 3 is close to clamp plate 1 is equipped with first fastening bolt 4, and first fastening bolt 4 passes clamp plate 1 and contradicts with first mandrel 3, and when mould backpressure was too big in the production process, can effectively stop first mandrel 3's rearward movement, prevents the emergence of hourglass material phenomenon.
The second core die 7 is fixedly arranged on the pressing plate 1, so that the position of the second core die is always unchanged, and the uniformity of the first melt channel is only related to that of the first core die 3; meanwhile, the uniformity of the second melt channel is only related to the first outer die 5, and the mutual influence during the adjustment of the wall thickness of the inner layer and the outer layer of the pipe is prevented.
The second mold body is composed of a second outer mold 12 and a third core mold 16, the second outer mold 12 is sleeved on the outer side of the third core mold 16, a third melt channel is formed between the inner surface of the second outer mold 12 and the outer surface of the third core mold 16, and the third melt channel is respectively communicated with the first melt channel and the second melt channel.
The third melt channel formed between the second outer die 12 and the third core die 16 is tapered, so that a certain die compression ratio is formed, and a certain back pressure is formed when the melt passes through the third melt channel, so as to increase the initial bonding strength of the extruded melt of the inner layer and the outer layer of the pipe.
The second outer die 12 and the first outer die 5 are coaxially arranged and fixedly connected, the third core die 16 and the first core die 3 are coaxially arranged and fixedly connected, an eccentric inner embedded ring 11 is further arranged at the joint of the second outer die 12 and the first outer die 5, the eccentric inner embedded ring 11 is embedded at the joint of the second outer die 12 and the first outer die 5, the eccentric inner embedded ring 11 is located above the second melt channel, the top of the eccentric inner embedded ring 11 is fixedly connected with the bottom of a screw of the second eccentric bolt 10, and the second eccentric bolt 10 is vertically arranged at the joint of the first outer die 5 and the second outer die 12.
The side of the eccentric inner embedded ring 11 far away from the first outer die 5 is flush with the side of the second core die 7 far away from the pressing plate 1, as shown in fig. 1, the left end surface of the eccentric inner embedded ring 11 and the left end of the second core die 7 are on the same vertical surface, and the eccentric degree of the eccentric inner embedded ring 11 and the axial lead can be adjusted by adjusting the second eccentric bolt 10, so that the purpose of adjusting the wall thickness eccentricity of the outer layer of the pipe is achieved, and the eccentricity of the inner layer is not influenced.
The third mold body is composed of a third outer mold 15 and a fourth core mold 17, wherein the third outer mold 15 is sleeved outside the fourth core mold 17, the third outer mold 15 is located on one side, far away from the first outer mold 5, of the second outer mold 12, the third outer mold 15 and the second outer mold 12 are coaxially arranged and fixedly connected, and the fourth core mold 17 and the third core mold 16 are coaxially arranged and fixedly connected.
A fourth melt channel is formed between the inner surface of the third outer die 15 and the outer surface of the fourth core die 17, and the fourth melt channel is communicated with the third melt channel.
The middle part of the inner surface of the third outer die 15 is provided with a convex structure, so that the melt pressure can be further increased, and the bonding strength of the extruded melt of the inner layer and the outer layer of the pipe can be further increased.
An opening die 14 is arranged on one side, away from the second die body, of the third die body, the opening die 14 is fixedly connected with the third die body, specifically, the opening die 14 is sleeved on the outer side of a core rod 19, the opening die 14 is fixedly connected with a third outer die 15, the core rod 19 is fixedly connected with a third core die 16, a fifth melt channel is formed between the opening die 14 and the core rod 19, and the fifth melt channel is communicated with a fourth melt channel.
The third outer die 15 is provided with a third eccentric bolt 13, the third eccentric bolt 13 is vertically arranged and penetrates through the third outer die 15, the bottom of a screw rod of the third eccentric bolt 13 is in contact with the outer surface of the neck ring die 14, and the neck ring die 14 adjusts the integral wall thickness eccentricity of the pipe through the third eccentric bolt 13 so as to ensure that the wall thickness of the pipe is uniform.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pipe co-extrusion die capable of independently adjusting wall thickness is characterized by comprising a first die body, a second die body and a third die body which are coaxially arranged and fixedly connected in sequence, wherein an eccentric inner embedded ring is arranged at the joint of the first die body and the second die body, and a pressing plate is fixedly arranged at one end, far away from the second die body, of the first die body;
the first die body is composed of a first core die, a second core die and a first outer die which are coaxially arranged, the first core die is located inside the second core die, the second core die is located inside the first outer die, one ends of the second core die and the first outer die are fixedly arranged on the pressing plate, the first core die is connected with the first outer die and the second core die through first eccentric bolts, and one end, close to the pressing plate, of the first core die is abutted to fastening bolts arranged on the pressing plate.
2. The co-extrusion die for pipes with adjustable wall thickness as claimed in claim 1, wherein the first mandrel has a first spiral fluid channel on its outer circumferential surface, and a first melt channel is formed between the second mandrel and the first mandrel, the first spiral fluid channel is connected to the first melt channel, and the first spiral fluid channel is connected to an external extruder via a feed channel.
3. The co-extrusion die for the pipe with the wall thickness capable of being adjusted independently as claimed in claim 1, wherein a second spiral fluid channel is arranged on the outer circumferential surface of the second core die, a second melt channel is formed between the first outer die and the second core die, the second spiral fluid channel is communicated with the second melt channel, and a connecting port is arranged on the first outer die and is communicated with the second spiral fluid channel.
4. The pipe co-extrusion die capable of independently adjusting the wall thickness as claimed in claim 1, wherein the first eccentric bolt is vertically arranged and penetrates through the first outer die and the second core die, and the bottom of the screw of the first eccentric bolt is in contact with the outer surface of the first core die.
5. The co-extrusion pipe die capable of independently adjusting the wall thickness as claimed in claim 1, wherein the second die body is provided with a second outer die, a third core die is coaxially arranged inside the second outer die, the second outer die is coaxially arranged and fixedly connected with the first outer die, and the third core die is coaxially arranged and fixedly connected with the first core die.
6. A pipe co-extrusion die capable of adjusting the wall thickness independently as claimed in claim 5, wherein a third melt channel is formed between the second outer die and the third core die, the third melt channel is communicated with the first die body, and the third melt channel is tapered.
7. The co-extrusion die for the pipe with the wall thickness capable of being adjusted independently as claimed in claim 5, wherein the joint of the second outer die and the first outer die is provided with an eccentric inner embedded ring and a second eccentric bolt, the second eccentric bolt is vertically arranged and is positioned at the top of the eccentric inner embedded ring, and the bottom of the second eccentric bolt is fixedly connected with the top of the eccentric inner embedded ring.
8. The co-extrusion die for pipes with adjustable wall thickness independently as claimed in claim 1, wherein the side of the eccentric inner embedded ring away from the first outer die is flush with the side of the second core die away from the press plate.
9. The co-extrusion die for the pipe with the wall thickness capable of being adjusted independently as claimed in claim 1, wherein the third die body is provided with a third outer die, a fourth core die is arranged inside the third outer die, a raised structure is arranged in the middle of the inner surface of the third outer die, a fourth melt channel is formed between the third outer die and the fourth core die, and the fourth melt channel is communicated with the second die body.
10. The co-extrusion die for the pipe with the wall thickness capable of being adjusted independently as claimed in claim 9, wherein a neck ring is fixedly arranged on one side of the third die body away from the second die body, a core rod is arranged inside the neck ring, a fifth melt channel is formed between the neck ring and the core rod, the fifth melt channel is communicated with the third die body, a third vertical eccentric bolt is arranged on the third outer die, and the bottom of a screw rod of the third eccentric bolt is in contact with the outer surface of the neck ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220658248.7U CN217319230U (en) | 2022-03-24 | 2022-03-24 | Pipe co-extrusion die capable of independently adjusting wall thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220658248.7U CN217319230U (en) | 2022-03-24 | 2022-03-24 | Pipe co-extrusion die capable of independently adjusting wall thickness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217319230U true CN217319230U (en) | 2022-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220658248.7U Active CN217319230U (en) | 2022-03-24 | 2022-03-24 | Pipe co-extrusion die capable of independently adjusting wall thickness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217319230U (en) |
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2022
- 2022-03-24 CN CN202220658248.7U patent/CN217319230U/en active Active
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