CN216579131U

CN216579131U - Three-layer co-extrusion die with adjustable thickness

Info

Publication number: CN216579131U
Application number: CN202122599887.9U
Authority: CN
Inventors: 张伟光
Original assignee: Guangdong Liansu Machinery Manufacturing Co Ltd
Current assignee: Guangdong Liansu Machinery Manufacturing Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-05-24
Anticipated expiration: 2031-10-27

Abstract

The utility model discloses a three-layer co-extrusion die with adjustable thickness, which is characterized by comprising an outer die body, a distributor and an adjusting assembly, wherein the distributor is provided with an outer layer channel, a middle layer channel and an inner layer channel; wherein the outer layer adjuster is used for adjusting the sectional area of the outer layer channel and is provided with a first ring die and a first adjusting bolt; the inner-layer adjuster is used for adjusting the sectional area of the inner-layer channel and is provided with a second ring die, a second adjusting bolt and a wedge-shaped transmission piece. The utility model can independently adjust the wall thickness of the outer layer and the inner layer of the pipe, thereby adjusting the concentricity of the outer layer and the inner layer and avoiding the circumferential eccentricity problem of the pipe.

Description

Three-layer co-extrusion die with adjustable thickness

Technical Field

The utility model relates to the technical field of extrusion dies, in particular to a three-layer co-extrusion die with adjustable thickness.

Background

In the production of the three-layer co-extrusion PE pipe, two extruders are used for supplying melt to an extrusion die, wherein one extruder is used for supplying the melt to the extrusion die to form the inner layer and the outer layer of the pipe, and the other extruder is used for supplying the melt to the extrusion die to form the middle layer of the pipe, so that the three-layer PE pipe with fixed specification can be produced.

Structurally, the extrusion die comprises an outer die body, a distributor arranged in the outer die body and a die opening connected with the distributor, wherein the outer die body is provided with a feed inlet, and the distributor is provided with an outer ring die matched with the outer die body to form an outer layer channel, a middle layer ring die matched with the outer ring die to form a middle layer channel and an inner layer ring die matched with the middle layer ring die to form an inner layer channel.

When the pipe is extruded, the melt enters from the feed inlet, then passes through the outer layer channel, the middle layer channel and the inner layer channel of the distributor, and finally, the three layers of melt are fused at the die orifice to form the PE pipe with three layers of thickness.

However, due to manufacturing and installation variations of the extrusion die, the circumferences of the inner layer and the outer layer are not concentric when the pipe is extruded, thereby causing circumferential eccentricity of the pipe.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a thickness-adjustable three-layer co-extrusion die which can independently adjust the wall thicknesses of an outer layer and an inner layer of a pipe, so that the concentricity of the wall thicknesses of the outer layer and the inner layer can be adjusted, and the circumferential eccentricity problem of the pipe is avoided.

A thickness-adjustable three-layer co-extrusion die comprises an outer die body and a distributor, the distributor is arranged in the outer die body and is provided with an outer layer ring die, a middle layer ring die and an inner layer ring die, the inner side of the outer die body is matched with the outer ring die to form an outer layer channel, the outer layer channel is used for extruding the outer layer of the pipe, the inner side of the outer layer ring die is matched with the middle layer ring die to form a middle layer channel, the middle layer channel is used for extruding a middle layer of a pipe, the inner side of the middle layer ring die is matched with the inner layer ring die to form an inner layer channel, the inner layer channel is used for extruding the inner layer of the pipe, the pipe extrusion die further comprises an adjusting component, the adjustment assembly having an outer layer adjuster for adjusting the cross-sectional area of the outer layer channel and an inner layer adjuster for adjusting the cross-sectional area of the inner layer channel; the outer layer adjuster is provided with a first ring die and a first adjusting bolt, the first ring die is arranged between the outer die body and the outer layer ring die, the inner side of the first ring die is matched with the outer layer ring die to form the outer layer channel, the first adjusting bolt is arranged on the outer die body, and the end part of the first adjusting bolt is abutted to the outer side of the first ring die; the inner-layer adjuster is provided with a second ring die, a second adjusting bolt and a wedge-shaped transmission piece, the second ring die is arranged between the middle-layer ring die and the inner-layer ring die, the outer side of the second ring die is matched with the middle-layer ring die to form the inner-layer channel, the second adjusting bolt is arranged on the inner-layer ring die, the wedge-shaped transmission piece is arranged between the second ring die and the second adjusting bolt, and the second adjusting bolt and the wedge-shaped transmission piece are arranged in an offset mode.

The three-layer co-extrusion die with the adjustable thickness provided by the embodiment of the utility model at least has the following beneficial effects: through setting up the outer layer regulator, make the outer layer regulator have first ring mould and first adjusting bolt to, twist and move first adjusting bolt, also make first ring mould be close to or keep away from outer ring mould, also can change the concentricity of first ring mould and outer layer ring mould, it is corresponding, changed the size of outer passageway, and then, can change the outer wall thickness of tubular product.

Through setting up the inlayer regulator, make the inlayer regulator have second ring mould, wedge driving medium and second adjusting bolt to, twist the second adjusting bolt, make wedge driving medium drive second ring mould be close to or keep away from the intermediate level ring mould, just also can change the concentricity of second ring mould and intermediate level ring mould, corresponding, changed the size of inlayer passageway, and then, can change the wall thickness of tubular product inlayer.

In addition, by adjusting the outer layer adjuster and the inner layer adjuster, the concentricity of the outer layer and the inner layer of the pipe can be changed, and the problem of circumferential eccentricity of the pipe caused by manufacturing and mounting deviation of an extrusion die can be solved.

According to some embodiments of the utility model, the first adjusting bolts are provided in a plurality, and the first adjusting bolts are uniformly distributed along the radial direction of the outer die body.

The beneficial results are: a plurality of first adjusting bolts are arranged along the radial direction of the outer die body, and therefore the distance between the first ring die and each position of the outer layer ring die can be adjusted by rotating the first adjusting bolts, and the concentricity of the first ring die and the outer layer ring die can be changed.

According to some embodiments of the utility model, the inner ring of the first ring die is provided with a first annular chamfer cooperating with the outer layer ring die to form the outer layer channel.

The beneficial results are: the inner ring of the first ring die is provided with the first annular inclined surface, so that the first annular inclined surface is matched with the outer layer ring die to form an outer layer channel, namely the thickness of the first ring die is reduced by arranging the first annular inclined surface, and the outer layer channel is adjusted by screwing the first adjusting bolt more easily.

According to some embodiments of the utility model, a first connecting ring is disposed between the first ring mold and the outer mold body, the outer mold body and the first connecting ring forming a first annular groove that receives the first ring mold.

The beneficial results are: the first connecting ring is arranged between the first ring die and the outer die body, so that the outer layer ring die and the first connecting ring form a first annular groove, the first annular groove is used for accommodating the first ring die, the section difference between the outer die body and the first ring die is reduced, and the resistance of the first ring die to the flow of a molten body is also reduced.

According to some embodiments of the utility model, the second ring die outer ring is provided with a second annular chamfer cooperating with an intermediate layer ring die to form the inner layer channel.

The beneficial results are: be provided with second annular inclined plane through second ring mould outer lane to, the inlayer passageway that second annular inclined plane and intermediate level ring mould cooperation formed, also be exactly through the thickness that reduces the second ring mould, make to twist and move second adjusting bolt and adjust inlayer passageway more easily.

According to some embodiments of the utility model, a second connecting ring is arranged between the second ring die and the inner layer ring die, and the end surface of the second connecting ring is provided with the second adjusting bolt.

The beneficial results are: by providing the second connecting ring between the second ring die and the inner ring die, the second ring die is easier to install on the one hand, and sufficient operating space is available for adjusting the second adjusting bolt on the other hand.

According to some embodiments of the utility model, the second adjusting bolt has a plurality of second adjusting bolts, and the plurality of second adjusting bolts are uniformly distributed along the radial direction of the second connecting ring.

The beneficial results are: the plurality of second adjusting bolts are uniformly distributed along the radial direction of the second connecting ring, so that the distance between the second ring die and each position of the middle layer ring die can be adjusted by rotating the second adjusting bolts, and the concentricity of the second ring die and the middle layer ring die can be changed.

According to some embodiments of the utility model, the second ring die is provided with a second annular groove, the end of the wedge drive cooperating with the second annular groove.

The beneficial results are: the second annular die is provided with the second annular groove, so that the end part of the wedge-shaped transmission member is matched with the second annular groove, and the wedge-shaped transmission member is more convenient and easier to push the second annular die.

According to some embodiments of the utility model, the wedge drive is inclined such that a low point of the wedge drive abuts the second adjusting bolt.

The beneficial results are: the wedge-shaped transmission member is obliquely arranged, so that the lower point of the wedge-shaped transmission member is abutted to the second adjusting bolt, and when the second adjusting bolt is screwed, the wedge-shaped transmission member can drive the second ring die, and the distance between the second ring die and the middle layer ring die can be adjusted by the wedge-shaped transmission member.

According to some embodiments of the utility model, the second connecting ring and the inner layer ring mold form a third annular groove that receives the second ring mold.

The beneficial results are: the second connecting ring and the inner layer ring mold form a third annular groove, so that the third annular groove is used for accommodating the second ring mold, the section difference between the inner layer ring mold and the second ring mold is reduced, and the resistance of the second ring mold to the flow of a solution is reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a three-layer co-extrusion die with adjustable thickness according to an embodiment of the utility model.

Reference numerals: 100-outer mold, 110-distributor, 120-middle layer channel, 130-outer layer ring mold, 150-middle layer ring mold, 170-inner layer ring mold, 180-outer layer adjuster, 190-inner layer adjuster, 200-outer layer channel, 210-first ring mold, 220-first connecting ring, 230-first adjusting bolt, 240-inner layer channel, 250-second ring mold, 260-second connecting ring, 270-second adjusting bolt, 280-first annular inclined surface, 290-first annular groove, 300-second annular inclined surface, 310-wedge drive, 320-second annular groove, 330-third annular groove.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A thickness adjustable three-layer co-extrusion die according to an embodiment of the utility model is described below with reference to the accompanying drawings.

Referring to fig. 1, the thickness-adjustable three-layer co-extrusion mold according to an embodiment of the present invention includes an outer mold body 100 and a distributor 110, the distributor 110 is disposed in the outer mold body 100, the distributor 110 has an outer layer ring mold 130, an intermediate layer ring mold 150 and an inner layer ring mold 170, an inner side of the outer mold body 100 cooperates with the outer layer ring mold 130 to form an outer layer channel 200, the outer layer channel 200 is used for extruding an outer layer of a pipe, an inner side of the outer layer ring mold 130 cooperates with the intermediate layer ring mold 150 to form an intermediate layer channel 120, the intermediate layer channel 120 is used for extruding an intermediate layer of the pipe, an inner side of the intermediate layer ring mold 150 cooperates with the inner layer ring mold 170 to form an inner layer channel 240, and the inner layer channel 240 is used for extruding an inner layer of the pipe.

Further, a regulating assembly is included having an outer layer regulator 180 for regulating the cross-sectional area of the outer layer passage 200 and an inner layer regulator 190 for regulating the cross-sectional area of the inner layer passage 240.

The outer layer adjuster 180 has a first ring die 210 and a first adjusting bolt 230, the first ring die 210 is disposed between the outer body 100 and the outer layer ring die 130, the inner side of the first ring die 210 and the outer layer ring die 130 cooperate to form an outer layer channel 200, the first adjusting bolt 230 is disposed on the outer body 100, and the end of the first adjusting bolt 230 abuts against the outer side of the first ring die 210.

The inner layer adjuster 190 has a second ring mold 250, a second adjusting bolt 270 and a wedge actuator 310, the second ring mold 250 is disposed between the middle layer ring mold 150 and the inner layer ring mold 170, the outer side of the second ring mold 250 cooperates with the middle layer ring mold 150 to form the inner layer channel 240, the second adjusting bolt 270 is disposed on the inner layer ring mold 170, the wedge actuator 310 is disposed between the second ring mold 250 and the second adjusting bolt 270, and the second adjusting bolt 270 is offset from the wedge actuator 310.

Through the arrangement of the outer layer adjuster 180, the outer layer adjuster 180 is provided with the first ring die 210 and the first adjusting bolt 230, so that the first adjusting bolt 230 is screwed, the first ring die 210 is close to or far away from the outer layer ring die 130, the concentricity of the first ring die 210 and the outer layer ring die 130 can be changed, correspondingly, the size of the outer layer channel 200 is changed, and further, the wall thickness of the outer layer of the pipe can be changed.

By arranging the inner-layer adjuster 190, the inner-layer adjuster 190 is provided with the second ring die 250, the wedge-shaped transmission member 310 and the second adjusting bolt 270, so that the second adjusting bolt 270 is screwed, the wedge-shaped transmission member 310 drives the second ring die 250 to be close to or far away from the intermediate-layer ring die 150, the concentricity of the second ring die 250 and the intermediate-layer ring die 150 can be changed, correspondingly, the size of the inner-layer channel 240 is changed, and further, the wall thickness of the inner layer of the pipe can be changed.

In addition, by adjusting the outer layer adjuster 180 and the inner layer adjuster 190, the concentricity of the outer layer and the inner layer of the pipe can be changed, and the problem of circumferential eccentricity of the pipe caused by manufacturing and mounting deviation of an extrusion die can be solved.

In some embodiments of the present invention, the first adjusting bolts 230 are provided in several numbers, and several first adjusting bolts 230 are uniformly distributed along the radial direction of the outer mold 100.

The first adjusting bolts 230 are arranged in a plurality, and the first adjusting bolts 230 are uniformly distributed along the radial direction of the outer mold 100, so that the distance between the first ring mold 210 and each position of the outer layer ring mold 130 can be adjusted by rotating the first adjusting bolts 230, and the concentricity of the first ring mold 210 and the outer layer ring mold 130 can be changed.

In some embodiments of the present invention, the inner ring of the first ring die 210 is provided with a first annular chamfer 280, and the first annular chamfer 280 cooperates with the outer layer ring die 130 to form the outer layer channel 200.

It can be understood that the outer passage 200 is adjusted more easily by screwing the first adjustment bolt 230 by providing the inner ring of the first ring die 210 with the first annular slope 280 such that the first annular slope 280 cooperates with the outer layer ring die 130 to form the outer layer passage 200, i.e., by providing the first annular slope 280 to reduce the thickness of the first ring die 210.

In some embodiments of the present invention, a first connection ring 220 is disposed between the first ring mold 210 and the outer mold 100, the outer mold 100 and the first connection ring 220 form a first annular groove 290, and the first annular groove 290 receives the first ring mold 210.

Reasonably, the first connecting ring 220 is arranged between the first ring mold 210 and the outer mold body 100, so that the outer layer ring mold 130 and the first connecting ring 220 form a first annular groove 290, and the first annular groove 290 accommodates the first ring mold 210, thereby reducing the section difference between the outer mold body 100 and the first ring mold 210, and also reducing the resistance of the first ring mold 210 to the melt flow.

In some embodiments of the present invention, the second ring mold 250 is provided with a second annular chamfer 300 on the outer circumference, the second annular chamfer 300 cooperating with the intermediate layer ring mold 150 to form the inner layer channel 240.

It can be understood that the second annular inclined surface 300 is provided on the outer circumference of the second ring die 250, so that the second annular inclined surface 300 cooperates with the inner layer channel 240 formed by the intermediate layer ring die 150, that is, by reducing the thickness of the second ring die 250, the inner layer channel 240 can be adjusted more easily by screwing the second adjusting bolt 270.

In some embodiments of the present invention, a second coupling ring 260 is disposed between the second ring mold 250 and the inner layer ring mold 170, and a second adjusting bolt 270 is disposed at an end surface of the second coupling ring 260.

It can be understood that by providing the second coupling ring 260 between the second ring mold 250 and the inner layer ring mold 170, on the one hand, the second ring mold 250 is more easily installed, and on the other hand, there is enough operating space to adjust the second adjusting bolt 270.

In some embodiments of the present invention, the second adjusting bolts 270 have a plurality, and a plurality of the second adjusting bolts 270 are uniformly arranged along a radial direction of the second coupling ring 260.

The plurality of second adjusting bolts 270 are uniformly arranged along the radial direction of the second connecting ring 260, so that the distance between the second ring mold 250 and each position of the middle layer ring mold 150 can be adjusted by rotating the second adjusting bolts 270, and the concentricity of the second ring mold 250 and the middle layer ring mold 150 can also be changed.

In some embodiments of the present invention, second ring mold 250 is provided with a second annular groove 330, and the ends of wedge driver 310 mate with second annular groove 330.

It will be appreciated that by providing second ring die 250 with second annular groove 330, the end of wedge drive member 310 mates with second annular groove 330, i.e., makes it easier and easier for wedge drive member 310 to push against second ring die 250.

In some embodiments of the present invention, wedge drive 310 is angled such that the low point of wedge drive 310 abuts second adjusting bolt 270.

Conveniently, the wedge actuator 310 is inclined such that the lower point of the wedge actuator 310 abuts against the second adjusting bolt 270, so that when the second adjusting bolt 270 is screwed, the wedge actuator 310 drives the second ring mold 250, and the wedge actuator 310 can adjust the distance between the second ring mold 250 and the middle layer ring mold 150.

In some embodiments of the present invention, the secondary connecting ring 260 and the inner ring mold 170 form a third annular groove 320, and the third annular groove 320 receives the secondary ring mold 250.

It can be understood that, by forming the third annular groove 320 by the second connection ring 260 and the inner layer annular mold 170, and making the third annular groove 320 receive the second annular mold 250, the step difference between the inner layer annular mold 170 and the second annular mold 250 is reduced, and the resistance of the second annular mold 250 to the flow of the solution is also reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. The three-layer co-extrusion die with the adjustable thickness is characterized by comprising an outer die body (100) and a distributor (110), wherein the distributor (110) is arranged in the outer die body (100), the distributor (110) is provided with an outer layer ring die (130), a middle layer ring die (150) and an inner layer ring die (170), the inner side of the outer die body (100) is matched with the outer layer ring die (130) to form an outer layer channel (200), the outer layer channel (200) is used for extruding an outer layer of a pipe, the inner side of the outer layer ring die (130) is matched with the middle layer ring die (150) to form a middle layer channel (120), the middle layer channel (120) is used for extruding a middle layer of the pipe, the inner side of the middle layer ring die (150) is matched with the inner layer ring die (170) to form an inner layer channel (240), the inner layer channel (240) is used for extruding an inner layer of the pipe, and an adjusting component is further included, the adjustment assembly having an outer layer adjuster (180) for adjusting the cross-sectional area of the outer layer channel (200) and an inner layer adjuster (190) for adjusting the cross-sectional area of the inner layer channel (240);

wherein the outer layer regulator (180) is provided with a first ring die (210) and a first regulating bolt (230), the first ring die (210) is arranged between the outer die body (100) and the outer layer ring die (130), the inner side of the first ring die (210) is matched with the outer layer ring die (130) to form the outer layer channel (200), the first regulating bolt (230) is arranged on the outer die body (100), and the end part of the first regulating bolt (230) is abutted with the outer side of the first ring die (210);

wherein the inner layer adjuster (190) is provided with a second ring die (250), a second adjusting bolt (270) and a wedge-shaped transmission piece (310), the second ring die (250) is arranged between the middle layer ring die (150) and the inner layer ring die (170), the outer side of the second ring die (250) is matched with the middle layer ring die (150) to form the inner layer channel (240), the second adjusting bolt (270) is arranged on the inner layer ring die (170), the wedge-shaped transmission piece (310) is arranged between the second ring die (250) and the second adjusting bolt (270), and the second adjusting bolt (270) is arranged in an offset mode with the wedge-shaped transmission piece (310).

2. The three-layer co-extrusion die with adjustable thickness as claimed in claim 1, wherein the first adjusting bolts (230) are provided in a plurality, and the first adjusting bolts (230) are uniformly distributed along the radial direction of the outer die body (100).

3. Triple coextrusion die according to claim 1, wherein the inner ring of the first ring die (210) is provided with a first annular bevel (280), and the first annular bevel (280) cooperates with the outer ring die (130) to form the outer layer channel (200).

4. The three-layer co-extrusion die with adjustable thickness as claimed in claim 1, wherein a first connecting ring (220) is disposed between the first ring die (210) and the outer die body (100), the outer die body (100) and the first connecting ring (220) form a first annular groove (290), and the first annular groove (290) accommodates the first ring die (210).

5. Three-layer co-extrusion die with adjustable thickness according to claim 1, characterized in that the second ring die (250) is provided with a second annular inclined surface (300) at the outer circle, and the second annular inclined surface (300) and the middle layer ring die (150) cooperate to form the inner layer channel (240).

6. The three-layer co-extrusion die with adjustable thickness as claimed in claim 1, wherein a second connecting ring (260) is arranged between the second ring die (250) and the inner layer ring die (170), and the end surface of the second connecting ring (260) is provided with the second adjusting bolt (270).

7. The three-layer co-extrusion die with adjustable thickness as claimed in claim 6, wherein the second adjusting bolts (270) are provided in a plurality, and a plurality of the second adjusting bolts (270) are uniformly distributed along the radial direction of the second connecting ring (260).

8. Triple coextrusion die with adjustable thickness according to claim 1, characterized in that the second annular die (250) is provided with a second annular groove (320), the end of the wedge-shaped transmission member (310) cooperating with the second annular groove (320).

9. The three-layer coextrusion die with adjustable thickness according to claim 1, wherein the wedge actuator (310) is disposed obliquely, and the lower point of the wedge actuator (310) abuts against the second adjusting bolt (270).

10. The three-layer co-extrusion die with adjustable thickness as claimed in claim 6, wherein the second connecting ring (260) and the inner layer ring die (170) form a third annular groove (330), and the third annular groove (330) receives the second ring die (250).