CN212528625U

CN212528625U - Extrusion die head and plastic pipe for extruder

Info

Publication number: CN212528625U
Application number: CN202021083462.1U
Authority: CN
Inventors: 王亚峰; 马帅雷; 张瑜; 赵建党
Original assignee: Hebei Pushang Pipeline Technology Co ltd
Current assignee: Hebei Pushang Pipeline Technology Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-12
Anticipated expiration: 2030-06-12

Abstract

The utility model relates to an extrusion die head and plastic tubing for extruder, the extrusion die head body includes the outer die sleeve, the main feed joint that fixedly sets up on the outer die sleeve lateral wall, the vice die core that sets up in the outer die sleeve center of rotating, the main core mould that is located outside the vice die core and fixedly connected with the outer die sleeve of cover, and set up in the bush of main core mould lower part, the bush is set up on the outer die sleeve through the mode locking ring; an extrusion main runner is arranged between the main core mold and the mouth mold, the auxiliary core mold comprises a central shaft which is rotatably arranged on the outer mold sleeve, a cylindrical lug is arranged at the bottom of the central shaft after extending out of the main core mold, an auxiliary feeding joint is arranged at the top of the central shaft, an outlet groove with an opening at the bottom and an opening at the side wall is arranged on the side wall of the lug, and the auxiliary feeding joint is communicated with the outlet groove through the extrusion auxiliary runner. The utility model discloses can directly extrude the inner wall and have the bellied plastic tubing of spiral, simple process, convenience.

Description

Extrusion die head and plastic pipe for extruder

Technical Field

The utility model belongs to the plastic tubing field, concretely relates to extrusion die and plastic tubing for extruder.

Background

The existing extruded plastic pipe is generally only a circle of annular wall through which fluid can pass from the center, and has simple structure and lower strength, so the application of the extruded plastic pipe is limited, and the method for solving the strength problem of the extruded plastic pipe is that a plurality of openings are arranged on an extrusion core mould, so that the plastic pipe with a plurality of reinforcing ribs on the inner wall can be extruded, as shown in figure 1, the plastic pipe comprises a pipe body and a plurality of reinforcing ribs arranged on the inner wall of the pipe body along the circumference, but the pipe with the structure can only enhance the bending resistance strength, but the impact resistance of the pipe wall is not obviously enhanced, the pipe with the spiral protrusion on the inner wall not only can enhance the bending resistance strength of the pipe, but also can reduce the flow rate of the material on the pipe wall when conveying powdery material, so the wear resistance of the pipe is enhanced, but because the limit of an extrusion device is received, the pipe with the structure is only limited to an iron pipe at present, is prepared by a welding process and cannot be directly extruded.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide an extrusion die and plastic tubing for extruder, this extrusion die can extrude the inner wall and have the bellied plastic tubing of spiral.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

an extrusion die head for an extruder is fixedly arranged on an extrusion die head body of the extruder, a main discharge port and an auxiliary discharge port are arranged on the extruder, the extrusion die head body comprises an outer die sleeve, a main feeding joint fixedly arranged on the side wall of the outer die sleeve, an auxiliary die core rotatably arranged in the center of the outer die sleeve, a main die core sleeved outside the auxiliary die core and fixedly connected with the outer die sleeve, and a die opening arranged at the lower part of the main die core, and the die opening is arranged on the outer die sleeve through a die locking ring; the main feeding joint is fixedly connected with the main discharge hole, an extrusion main runner is arranged between the main core mold and the mouth mold, the auxiliary core mold comprises a center shaft which is rotatably arranged on the outer mold sleeve, a cylindrical lug is arranged at the bottom of the center shaft after extending out of the main core mold, an auxiliary feeding joint is arranged at the top of the center shaft, the auxiliary feeding joint is connected with the auxiliary discharge hole through a pipeline, an outlet groove with an open bottom and an open side wall is arranged on the side wall of the lug, and the auxiliary feeding joint is communicated with the outlet groove through an extrusion auxiliary runner.

Further, the top wall of the projection abuts against the bottom wall of the main core mold, and the outer diameter of the projection is equal to that of the main core mold.

Furthermore, the main core die comprises a splitter plate, a splitter cone arranged at the top of the splitter plate and a core arranged at the bottom of the splitter plate, the splitter plate divides the upper part of the outer die sleeve to form a feeding cavity, and a plurality of openings communicated with the feeding cavity and the extrusion main runner are arranged on the splitter plate.

Furthermore, the fixed pay-off spiral that is provided with on the center pin, the pay-off spiral adopts double helix structure or many helix structure, the pay-off spiral set up in the feeding intracavity, and be located the below of feed connection, the top of pay-off spiral is provided with the feeding epicoele, the below of pay-off spiral is provided with the feeding cavity of resorption.

Furthermore, a plurality of threaded holes are formed in the side wall of the outer die sleeve along the circumference at positions corresponding to the mouth die, adjusting bolts are arranged in the threaded holes, and the adjusting bolts penetrate through the threaded holes to be abutted against the outer wall of the mouth die.

Furthermore, an annular first boss is arranged on the inner wall of the outer die sleeve, the top of the splitter plate is abutted against the first boss, the bottom wall of the splitter plate is abutted against the top wall of the die, an annular second boss is arranged on the outer wall of the die, the die locking ring is arranged below the second boss and is abutted against the second boss, and the die locking ring is fixedly connected with the outer die sleeve through bolts.

Furthermore, extrude the sprue and include that back taper runner, annular back taper runner and annular are extruded to the mouth under the annular that from the top down communicates in proper order, back taper runner on the annular with the annular is down the tapering of back taper runner outer conical surface and all is less than the tapering of interior conical surface.

Still further, the mold core includes from the top down integrative last back taper body, connecting cylinder, back taper body and the cylindrical mold core of extruding of connecting, be provided with the helicla flute on connecting the outer wall of cylinder.

Furthermore, a motor is arranged after the top of the central shaft extends out of the outer die sleeve, and the central shaft is in transmission connection with a rotating output shaft of the motor.

The plastic pipe extruded by the extrusion die head for the extruder comprises a pipe body made of a plastic material and spiral protrusions arranged in the pipe body, wherein the pipe body is integrally connected with the spiral protrusions.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a structure to extrusion die improves, sets up main feeding joint by the tradition in outer die sleeve top and improves for setting up on outer die sleeve lateral wall to set up the vice mold core of pivoted on outer die sleeve, set up on vice mold core and extrude vice runner, along with extruding downwards of pipe body, extrude the ejection of compact of groove limit rotation limit of extruding vice runner, thereby it is protruding to form the spiral on the inner wall of pipe body, make the direct extrusion that has the bellied tubular product of heliciform become possible.

Drawings

Fig. 1 is a perspective view of a tube according to an embodiment of the present invention;

fig. 2 is a perspective view of an extrusion die for an extruder according to an embodiment of the present invention;

FIG. 3 is a schematic view of an extrusion die for an extruder according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

FIG. 5 is a perspective view of a secondary mold core according to an embodiment of the present invention;

fig. 6 is a perspective view of a main core mold according to an embodiment of the present invention;

fig. 7 is a diagram of the usage state of the extrusion die head for the extruder of the present invention.

In the figure: 1. an outer die sleeve, 2, a main feeding joint, 3, an auxiliary die core, 4, a main die core, 5, a die opening, 6, a die locking ring, 7, an extrusion main runner, 8, a central shaft, 9, a bump, 10, an auxiliary feeding joint, 11, an outlet groove, 12, an extrusion auxiliary runner, 13, a flow distribution plate, 14, a flow distribution cone, 15, a die core, 17, an opening, 18, a feeding screw, 19, a feeding upper cavity, 20, a feeding lower cavity, 21, an adjusting bolt, 22, a first boss, 23, a second boss, 24, an annular upper inverted cone runner, 25, an annular runner, 26, an annular lower inverted cone runner, 27, an annular extrusion opening, 28, an upper inverted cone, 29, a connecting cylinder, 30, a lower inverted cone, 31, an extrusion die core, 32, a spiral groove, 33 and a gear; 34. tube body, 35, spiral protrusion, 36, extruder, 37, extrusion die body.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the plastic pipe is formed by extrusion molding through an extruder 36, and includes a pipe body 34 made of plastic and a spiral protrusion 35 disposed in the pipe body 34, and the pipe body 34 and the spiral protrusion 35 are integrally connected.

As shown in fig. 2-7, the present invention relates to an embodiment of an extrusion die head for an extruder, which comprises an extrusion die head body 37 fixedly disposed on an extruder 36, and is characterized in that the extruder 36 is provided with a main discharge port and an auxiliary discharge port, the extrusion die head body 37 comprises an outer die sleeve 1, a main feeding joint 2 fixedly disposed on a side wall of the outer die sleeve 1, an auxiliary die core 3 rotatably disposed at a center of the outer die sleeve 1, a main die core 4 sleeved outside the auxiliary die core 3 and fixedly connected to the outer die sleeve 1, and a die 5 disposed at a lower portion of the main die core 4, wherein the die 5 is disposed on the outer die sleeve 1 through a die locking ring 6; the main feeding connector 2 is fixedly connected with the main discharging hole, an extrusion main runner 7 is arranged between the main core mold 4 and the mouth mold 5, the auxiliary core mold 3 comprises a central shaft 8 which is rotatably arranged on the outer mold sleeve 1, a cylindrical lug 9 is arranged at the bottom of the central shaft 8 after extending out of the main core mold 4, an auxiliary feeding connector 10 is arranged at the top of the central shaft 8, the auxiliary feeding connector 10 is connected with the auxiliary discharging hole through a pipeline, an outlet groove 11 with an opening at the bottom and an opening at the side wall is arranged on the side wall of the lug 9, and the auxiliary feeding connector 10 is communicated with the outlet groove 11 through an extrusion auxiliary runner 12. The utility model discloses a structure to extrusion die 37 improves, set up main feeding joint 2 by the tradition in 1 top of outer die sleeve and improve for setting up on 1 lateral wall of outer die sleeve, and set up pivoted vice die core 3 on outer die sleeve 1, set up on vice die core 3 and extrude vice runner 12, along with extruding downwards of pipe body 34, extrude the extrusion groove limit rotation limit ejection of compact of vice runner 12, thereby form spiral bulge 35 on the inner wall of pipe body 34, make the direct extrusion that has the bellied tubular product of heliciform become possible.

Further, the top wall of the projection 9 abuts against the bottom wall of the main core mold 4 and rotates relatively, and the outer diameter of the projection 9 is equal to the outer diameter of the main core mold 4.

Further, the outlet groove 11 is disposed obliquely, and the oblique direction of the outlet groove 11 is opposite to the rotation direction of the central shaft 8.

Further, the main core mold 4 includes a splitter plate 13, a splitter cone 14 disposed on the top of the splitter plate 13, and a core 15 disposed on the bottom of the splitter plate 13, the splitter plate 13 divides the upper portion of the outer mold sleeve 1 to form a feeding cavity, and the splitter plate 13 is provided with a plurality of openings 17 for communicating the feeding cavity with the extrusion main runner 7.

Further, a plurality of threaded holes are circumferentially formed in the side wall of the outer die sleeve 1 at positions corresponding to the die 5, adjusting bolts 21 are arranged in the threaded holes, and the adjusting bolts 21 penetrate through the threaded holes to abut against the outer wall of the die 5.

Further, an annular first boss 22 is arranged on the inner wall of the outer die sleeve 1, the top of the splitter plate 13 abuts against the first boss 22, the bottom wall of the splitter plate 13 abuts against the top wall of the die 5, an annular second boss 23 is arranged on the outer wall of the die 5, the die locking ring 6 is arranged below the second boss 23 and abuts against the second boss 23, and the die locking ring 6 is fixedly connected with the outer die sleeve 1 through bolts.

Further, extrude sprue 7 and include that back taper runner 24, annular runner 25, back taper runner 26 and annular are extruded mouthful 27 under the annular that from the top down communicates in proper order on the annular, back taper runner 24 on the annular with the conical degree of back taper runner 26 external cone all is less than the conical degree of interior conical surface under the annular.

Further, the core 15 comprises an upper inverted cone 28, a connecting cylinder 29, a lower inverted cone 30 and a cylindrical extrusion mold core 31 which are integrally connected from top to bottom, and the outer wall of the connecting cylinder 29 is provided with a spiral groove 32. The utility model discloses the material is when extruding main runner 7, receives the extrusion of back taper runner and with the dispersion and the mixing effect of the 25 corresponding department helicla flutes 32 of annular runner, has solved the pipe main part and has had the problem of weld line in the pipe main part that a plurality of open-ended reasons lead to on the flow distribution plate 13, has reduced the incidence of the uneven phenomenon of pipe main part macula lutea and wall thickness, has improved the yield of product in the very big degree.

Furthermore, a motor is arranged after the top of the central shaft 8 extends out of the outer die sleeve 1, and the central shaft 8 is in transmission connection with a rotating output shaft of the motor.

Furthermore, a gear 33 is fixedly arranged on the central shaft 8.

As an embodiment of the present invention, the central shaft 8 is provided with a feeding screw 18, the feeding screw 18 adopts a double-spiral structure or a multi-spiral structure, the feeding screw 18 is disposed in the feeding cavity and is located below the feeding joint, the upper side of the feeding screw 18 is provided with a feeding upper cavity 19, and the lower side of the feeding screw 18 is provided with a feeding lower cavity 20. The utility model discloses after changing main feed joint 2 into the lateral wall by the top of outer die sleeve 1, the material gets into and distributes unevenly in the feeding intracavity very easily behind the feeding chamber, and the utility model discloses a set up pay-off spiral 18, advance to get into feeding epicoele 19 when the material gets into the feeding chamber from the feed joint under the promotion and the dispersion of pay-off spiral 18, the material evenly gets into feeding cavity of resorption 20 by feeding epicoele 19 to can be even unanimous when having guaranteed that the material passes through flow distribution plate 13.

The utility model discloses a theory of operation:

when the utility model is extruded, a part of melting material enters the feeding upper cavity 19 through the main feeding joint 2, enters the feeding lower cavity 20 under the pushing and dispersing action of the feeding screw 18, then enters the extrusion main runner through a plurality of openings on the flow distribution plate 13, enters the annular runner 25 after being extruded by the upper inverted cone runner on the extrusion main runner, is dispersed and mixed under the action of the spiral groove 32 of the cylinder, and is extruded and formed into a pipe main body through the annular extrusion port 27 after being extruded by the lower inverted cone runner again;

along with the downward extrusion of the pipe main body, the central shaft 8 rotates under the action of the motor, meanwhile, the other part of molten material enters the extrusion auxiliary flow channel 12 through the auxiliary feeding connector 10 and is extruded from the outlet groove 11, because the outlet groove 11 is in the continuous rotating process along with the central shaft 8, the material moves downwards along with the extrusion of the pipe main body, and because the material is still in an unshaped state during the just extrusion, the material extruded from the outlet groove 11 can be bonded on the inner wall of the pipe main body to form a spiral protrusion 35, and the pitch of the spiral protrusion is the extrusion length of the pipe main body when the outlet groove 11 rotates for one circle.

The above-described embodiments are merely preferred examples of the present invention and are not exhaustive of the possible implementations of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.

Claims

1. An extrusion die head for an extruder is fixedly arranged on an extrusion die head body (37) of the extruder (36), and is characterized in that a main discharge port and an auxiliary discharge port are arranged on the extruder (36), the extrusion die head body (37) comprises an outer die sleeve (1), a main feeding joint (2) fixedly arranged on the side wall of the outer die sleeve (1), an auxiliary die core (3) rotatably arranged at the center of the outer die sleeve (1), a main die core (4) sleeved outside the auxiliary die core (3) and fixedly connected with the outer die sleeve (1), and a die opening (5) arranged at the lower part of the main die core (4), wherein the die opening (5) is arranged on the outer die sleeve (1) through a die locking ring (6); the main feeding connector (2) is fixedly connected with the main discharging port, an extrusion main runner (7) is arranged between the main core mold (4) and the mouth mold (5), the auxiliary core mold (3) is rotatably arranged on a central shaft (8) on the outer mold sleeve (1), a cylindrical lug (9) is arranged behind the main core mold (4) and extends out of the bottom of the central shaft (8), an auxiliary feeding connector (10) is arranged at the top of the central shaft (8), the auxiliary feeding connector (10) is connected with the auxiliary discharging port through a pipeline, an outlet groove (11) with a bottom opening and a side wall opening is formed in the side wall of the lug (9), and the auxiliary feeding connector (10) is communicated with the outlet groove (11) through an extrusion auxiliary runner (12).

2. The extrusion die head for an extruder according to claim 1, wherein the top wall of the projection (9) abuts against the bottom wall of the main core mold (4), and the outer diameter of the projection (9) is equal to the outer diameter of the main core mold (4).

3. The extrusion die head for the extruder according to claim 1, wherein the main core die (4) comprises a splitter plate (13), a splitter cone (14) arranged at the top of the splitter plate (13), and a core (15) arranged at the bottom of the splitter plate (13), the splitter plate (13) divides the upper part of the outer die sleeve (1) to form a feeding cavity, and a plurality of openings (17) communicating the feeding cavity with the extrusion main runner (7) are arranged on the splitter plate (13).

4. The extrusion die head for the extruder according to claim 3, wherein a feeding screw (18) is fixedly arranged on the central shaft (8), the feeding screw (18) adopts a double-spiral structure or a multi-spiral structure, the feeding screw (18) is arranged in the feeding cavity and is positioned below the feeding joint, a feeding upper cavity (19) is arranged above the feeding screw (18), and a feeding lower cavity (20) is arranged below the feeding screw (18).

5. The extrusion die head for the extruder as claimed in claim 3, wherein the side wall of the outer die sleeve (1) is provided with a plurality of threaded holes along the circumference at positions corresponding to the die (5), the threaded holes are internally provided with adjusting bolts (21), and the adjusting bolts (21) pass through the threaded holes to abut against the outer wall of the die (5).

6. The extrusion die head for the extruder as claimed in claim 3, wherein an annular first boss (22) is arranged on the inner wall of the outer die sleeve (1), the top of the splitter plate (13) abuts against the first boss (22), the bottom wall of the splitter plate (13) abuts against the top wall of the die (5), an annular second boss (23) is arranged on the outer wall of the die (5), the die locking ring (6) is arranged below the second boss (23) and abuts against the second boss (23), and the die locking ring (6) is fixedly connected with the outer die sleeve (1) through bolts.

7. The extrusion die head for the extruder according to claim 3, wherein the extrusion main flow channel (7) comprises an annular upper inverted cone flow channel (24), an annular flow channel (25), an annular lower inverted cone flow channel (26) and an annular extrusion port (27) which are sequentially communicated from top to bottom, and the taper of the outer conical surface of each of the annular upper inverted cone flow channel (24) and the annular lower inverted cone flow channel (26) is smaller than that of the inner conical surface.

8. The extrusion die head for the extruder in accordance with claim 3, wherein the core (15) comprises an upper inverted cone (28), a connecting cylinder (29), a lower inverted cone (30) and a cylindrical extrusion die core (31) which are integrally connected from top to bottom, and the outer wall of the connecting cylinder (29) is provided with a spiral groove (32).

9. The extrusion die head for the extruder according to claim 1, wherein a motor is arranged after the top of the central shaft (8) extends out of the outer die sleeve (1), and the central shaft (8) is in transmission connection with a rotating output shaft of the motor.

10. A plastic tube extruded by an extrusion die for an extruder according to any one of claims 1 to 9, comprising a tube body (34) of a plastic material and a spiral protrusion (35) provided in the tube body (34), wherein the tube body (34) and the spiral protrusion (35) are integrally connected.