CN222246024U - A die head for extruder used in cable production - Google Patents

Abstract

The utility model discloses an extruding machine die head for cable production, which belongs to the technical field of cable production equipment and comprises a fixed sleeve, a die sleeve and a die core, wherein one end of the fixed sleeve is radially inwards convexly provided with a fixed edge, the die sleeve is slidably arranged in the fixed sleeve along the axial direction of the fixed sleeve, the die core comprises a die core body and a fixed ring which are mutually connected, the die core body is arranged in the fixed sleeve, a material injection channel is formed between the die core body and the die sleeve, the fixed ring is fixedly connected with the end surface, far away from the fixed edge, of the fixed sleeve, a stud is arranged on the fixed edge, penetrates through the fixed edge and is in threaded connection with the fixed edge, and one end of the stud is rotatably connected with the die sleeve. The extrusion molding machine die head for cable production can adjust the die spacing without rotating the die sleeve, is simpler and more convenient to operate, and greatly improves the die spacing adjustment efficiency.

Description

Plastic extruding machine die head for cable production

Technical Field

The utility model relates to the technical field of cable production equipment, in particular to an extruder die head for cable production.

Background

The cable extruder is an important device in the production of electric wires and cables, the main function of which is to uniformly extrude molten plastic on the outer conductor layer of the electric wires and cables to form a continuous insulating layer. The die head of the plastic extruding machine is a key component on the plastic extruding machine, and reasonable die matching is beneficial to high-quality production of cables.

The extruder die head generally comprises a die core and a die sleeve, wherein the die core is used for allowing a cable to pass through, the die sleeve is used for limiting the size of an insulation layer after extrusion molding, and after the die core and the die sleeve are assembled in place, a material injection channel for allowing molten cable material to enter the die head is formed between the die core and the die sleeve. The axial distance between the core and the sleeve center holes is called the die spacing of the die head and is mainly used for adjusting the extrusion pressure. With the advancement of technology, the distance between the dies on the extruder die is gradually increasing toward adjustability. For example, chinese patent publication No. CN220548668U discloses an extrusion die for a cable sheath extruder, in which a die core and a die sleeve are connected by screw-fit, and the die space can be adjusted by rotating the die sleeve relative to the die core. The scheme in above-mentioned patent document needs whole rotation die sleeve when adjusting the die interval, simultaneously, in order to prevent not hard up, still sets up the elastic component between the two, and the elastic action of elastic component can further hinder the die sleeve to rotate, leads to the operation inconvenient, is unfavorable for quick adjustment die interval.

Disclosure of utility model

The utility model aims to solve the technical problems that in the prior art, the adjustment operation of the die spacing is inconvenient and is not beneficial to the rapid adjustment of the die spacing, and based on the technical problem, the utility model provides the extrusion molding machine die head for the cable production, which is convenient for adjusting the die spacing.

The technical scheme includes that the extruding machine die head for cable production comprises a fixing sleeve, a die sleeve and a die core, wherein one end of the fixing sleeve is provided with a fixing edge in a protruding mode in the radial direction, the die sleeve is slidably arranged in the fixing sleeve along the axial direction of the fixing sleeve, the die core comprises a die core body and a fixing ring which are connected with each other, the die core body is arranged in the fixing sleeve, a material injection channel is formed between the die core body and the die sleeve, the fixing ring is fixedly connected with the end face, far away from the fixing edge, of the fixing sleeve, a stud is arranged on the fixing edge, penetrates through the fixing edge and is in threaded connection with the fixing edge, and one end of the stud is rotatably connected with the die sleeve.

Further, a bearing is arranged on the end face, close to the fixed edge, of the die sleeve, the outer ring of the bearing is in interference fit with the die sleeve, one end of the stud is convexly provided with a smooth connecting section along the bearing, and the connecting section is in interference fit with the inner ring of the bearing.

Further, a bushing is fixedly arranged on the fixing edge, a threaded hole is formed in the bushing, and the stud is in threaded connection with the threaded hole.

Further, an operation part is arranged at one end of the stud opposite to the connecting section.

Further, a positioning column is convexly arranged on the end face, far away from the die core, of the die sleeve along the axial direction of the die sleeve, the positioning column is matched with the central hole wall of the fixed edge, and the positioning column can move relative to the fixed edge under the drive of the die sleeve.

Further, scale marks are arranged on the outer wall of the positioning column along the axial direction of the positioning column.

Further, a feeding groove is formed in the side wall of the fixed sleeve, and the feeding groove is communicated with the material injection channel.

Further, an inner conical groove is formed in one end, close to the die core, of the die sleeve, the inner conical groove is communicated with an inner cavity of the die sleeve, an outer conical portion is formed in one end, close to the die sleeve, of the die core body in a protruding mode, and the material injection channel is formed by a space clamped between the groove wall of the inner conical groove and the conical surface of the outer conical portion.

Further, the groove wall of the inner cone groove is in smooth transition connection with the end face of the die sleeve, and the outer cone part is in smooth transition connection with the end face of the die core body.

The utility model has the beneficial effects that the die head of the plastic extruding machine for cable production is provided, when a user adjusts the die spacing according to production requirements, the stud is only required to be rotated, so that the stud moves along the axial direction of the stud, and the die sleeve can be further driven to move relative to the die core, thereby changing the distance between the die sleeve and the die core, and achieving the function of adjusting the die spacing. Compared with the traditional mode of adjusting the die spacing by rotating the whole die sleeve, the die head does not need to rotate the die sleeve, is simpler and more convenient to operate, and greatly improves the die spacing adjustment efficiency.

Drawings

The utility model is further described below with reference to the drawings and examples.

FIG. 1 is a schematic view showing the structure of an extruder die for cable production according to the present utility model.

In the figure, 1, a fixed sleeve, 11, a fixed edge, 12, a feed chute, 13, a bushing, 131, a threaded hole, 2, a die sleeve, 21, an inner conical groove, 3, a die core, 31, a die core body, 32, a fixed ring, 30, a material injection channel, 4, a stud, 41, a connecting section, 42, an operating part, 5, a bearing, 6 and a bolt.

Detailed Description

The present utility model will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the utility model only by way of illustration, and therefore it shows only the constitution related to the utility model.

Referring to fig. 1, the utility model provides an extruder die head for cable production, which comprises a fixing sleeve 1, a die sleeve 2 and a die core 3, wherein the fixing sleeve 1 is of a cylindrical structure with two through ends, one end of the fixing sleeve 1 protrudes inwards along the radial direction of the fixing sleeve 1 to form a fixing edge 11, the die sleeve 2 is slidably arranged in the fixing sleeve 1 along the axial direction of the fixing sleeve 1, the die core 3 comprises a die core body 31 and a fixing ring 32 which are mutually connected, the fixing ring 32 is fixedly connected with the die core body 31, the die core body 31 is cooperatively arranged in the fixing sleeve 1, a material injection channel 30 is formed between the die core body 31 and the die sleeve 2, the fixing ring 32 is fixedly connected with the end surface, far away from the fixing edge 11, of the fixing sleeve 1, a stud 4 is arranged on the fixing edge 11, the stud 4 penetrates through the fixing edge 11 and is in threaded connection with the fixing edge 11, and one end of the stud 4 is rotatably connected with the die sleeve 2.

When the extrusion molding machine die head for cable production is assembled, the stud 4 is threaded through the fixed edge 11, then the die sleeve 2 is arranged in the fixed sleeve 1 from one side of the fixed sleeve 1 far away from the fixed edge 11, and the stud 4 is connected with one end side wall of the die sleeve 2 so as to keep the stud and the die sleeve to rotate relatively. Then, the mold core body 31 is inserted into the fixing sleeve 1 in a matched manner, and the fixing ring 32 is fixedly connected with the fixing sleeve 1, so that the die head assembly of the plastic extruding machine is completed. After the assembly is completed, the mold core 3 is fixedly arranged on a mold core seat of the plastic extruding machine, so that the fixed connection relationship between the mold head of the plastic extruding machine and the plastic extruding machine is realized.

In normal operation, molten plastic enters the die via the injection passage 30 and contacts the cable conductor passing through the die, and as the cable exits the die, the plastic forms a uniform insulating layer on the exterior of the conductor.

When the user adjusts the die spacing according to the production requirement, the stud 4 is only required to be rotated, so that the stud 4 moves along the axial direction of the stud, and the die sleeve 2 can be further driven to move relative to the die core 3, thereby changing the distance between the die sleeve 2 and the die core 3, and achieving the function of adjusting the die spacing. Compared with the traditional mode of adjusting the die spacing by rotating the whole die sleeve, the die head does not need to rotate the die sleeve 2, is simpler and more convenient to operate, and greatly improves the die spacing adjustment efficiency of the die head.

As a preferred embodiment, the end face of the die sleeve 2, which is close to the fixed edge 11, is provided with the bearing 5, the outer ring of the bearing 5 is in interference fit with the die sleeve 2, one end of the stud 4 is provided with a smooth connecting section 41 in an axially protruding manner, the connecting section 41 is in a cylindrical structure, the outer diameter of the connecting section 41 is smaller than the aperture of a threaded hole 131 in the fixed edge 11, so that the connecting section 41 can conveniently pass through the threaded hole 131, the connecting section 41 is in interference fit with the inner ring of the bearing 5, and therefore the stud 4 is arranged on the die sleeve 2 and can rotate relatively under the action of the bearing 5. The bearing 5 plays a supporting role on the stud 4, so that the stud 4 can drive the die sleeve 2 to reciprocate along the axial direction while the smooth rotation of the stud 4 and the die sleeve is improved.

Further, the bushing 13 is fixedly installed on the fixing edge 11, the threaded hole 131 is formed in the bushing 13, the stud 4 is in threaded connection with the threaded hole 131, the hardness of the bushing 13 is larger than that of the fixing edge 11, and the bushing 13 can prevent the fixing edge 11 from being easily damaged due to relative rotation with the stud 4 for a long time, so that the service life of the fixing sleeve 1 is prolonged.

In addition, the central axis of the stud 4 is parallel to the central axis of the fixed sleeve 1, so as to ensure that the moving direction of the stud 4 is the same as the moving direction of the die sleeve 2 during rotation.

An operation part 42 is arranged at one end of the stud 4 opposite to the connecting section 41, and the operation part 42 can be used for a user to rotate the stud 4. In this embodiment, the operation portion 42 is a nut fixedly connected to the stud 4, and the user can rotate the nut by using a wrench to further drive the stud 4 to rotate, however, the operation portion 42 may also be a slot or a cross slot formed at one end of the stud 4, and the user can rotate the stud 4 by using a corresponding screwdriver at this time, and of course, the operation portion 42 may also be a manual knob connected to the end of the stud 4, and the user can rotate the stud 4 by using a manual knob with bare hands, and the specific structure of the operation portion 42 is not limited herein.

The side wall of the fixed sleeve 1 is provided with a feed chute 12, and the feed chute 12 is communicated with a material injection channel 30. In operation, molten plastic is fed through feed chute 12 into injection passage 30. In practice, the feed channels 12 are multiple and uniformly distributed along the circumference of the stationary sleeve 1 to improve feed uniformity. In a preferred embodiment, the feed chute 12 is a long slot of kidney-shaped configuration, and the length direction of the feed chute 12 is arranged along the axial direction of the fixed sleeve 1.

The die sleeve 2 and the die core 3 are communicated at two ends and coaxially arranged so that a cable sequentially passes through the die core 3 and the die sleeve 2. In this embodiment, an inner taper groove 21 is formed at one end of the die sleeve 2 near the die core 3, the inner taper groove 21 is communicated with the inner cavity of the die sleeve 2, an outer taper portion 311 is formed on one end of the die core body 31 near the die sleeve 2 in a protruding manner, and a space sandwiched between the groove wall of the inner taper groove 21 and the conical surface of the outer taper portion 311 forms a material injection channel 30. The distance between the bottom of the inner cone groove 21 and the end of the outer cone 311 is the die space H.

In addition, the groove wall of the inner cone groove 21 is in smooth transition connection with the end face of the die sleeve 2, the outer cone part 311 is in smooth transition connection with the end face of the die core body 31, so that the flow resistance of molten plastics is reduced, the molten plastics can continuously and smoothly enter the die head, and the extrusion molding effect is improved.

Further, in order to improve the use experience of the user, a positioning column 22 is convexly arranged on the end face, far away from the mold core 3, of the mold sleeve 2 along the axial direction of the mold sleeve 2, the positioning column 22 is matched with the central hole wall of the fixed edge 11, and the positioning column 22 can move relative to the fixed edge 11 under the driving of the mold sleeve 2. The outer wall of the positioning column 22 is provided with scale marks along the axial direction of the positioning column 22, so that a user can observe the alignment relationship between the outer end surface of the fixed edge 11 and the scale marks to determine the moving distance of the die sleeve 2, and the die sleeve 2 can be quickly moved into place by the user.

The fixing ring 32 is of a circular ring structure, the outer diameter of the fixing ring 32 is the same as that of the fixing sleeve 1, and the end face of the fixing ring 32 is attached to the end face of the fixing sleeve 1. In specific implementation, the fixing ring 32 and the mold core body 31 are integrally formed, so that the production cost can be controlled while the production is convenient. In the present embodiment, the fixing ring 32 is fixedly connected to the fixing sleeve 1 by the bolts 6, so that the mold core 3 is fixedly mounted on the fixing sleeve 1.

While the foregoing is directed to the preferred embodiment of the present utility model, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (9)

1. The plastic extruding machine die head for producing the cable is characterized by comprising a fixing sleeve, a die sleeve and a die core, wherein one end of the fixing sleeve is provided with a fixing edge in a protruding mode in the radial direction, the die sleeve is slidably arranged in the fixing sleeve along the axial direction of the fixing sleeve, the die core comprises a die core body and a fixing ring which are mutually connected, the die core body is arranged in the fixing sleeve, a material injecting channel is formed between the die core body and the die sleeve, the fixing ring is fixedly connected with the fixing sleeve, the end face, far away from the fixing edge, of the fixing sleeve is fixedly connected with a stud, the stud penetrates through the fixing edge and is in threaded connection with the fixing edge, and one end of the stud is rotatably connected with the die sleeve.

2. The extrusion die head of claim 1, wherein the end face of the die sleeve, which is close to the fixed edge, is provided with a bearing, the outer ring of the bearing is in interference fit with the die sleeve, one end of the stud is convexly provided with a smooth connecting section along the bearing, and the connecting section is in interference fit with the inner ring of the bearing.

3. The extruder die head for cable production as in claim 2, wherein a bushing is fixedly mounted on the fixed edge, a threaded hole is formed in the bushing, and the stud is in threaded connection with the threaded hole.

4. The extruder die for producing cables according to claim 2, wherein an operation portion is provided at an end of the stud opposite to the connecting section.

5. The extruder die head for cable production according to claim 1, wherein a positioning column is convexly arranged on the end face of the die sleeve, which is far away from the die core, along the axial direction of the die sleeve, the positioning column is matched with the central hole wall of the fixed edge, and the positioning column can move relative to the fixed edge under the drive of the die sleeve.

6. The extruder die head for producing cables as claimed in claim 5, wherein graduation marks are arranged on the outer wall of the positioning column along the axial direction of the positioning column.

7. The extruder die head for producing cables as set forth in claim 1 wherein a feed chute is provided in the side wall of the stationary sleeve, said feed chute being in communication with the injection passage.

8. The extrusion die head of claim 1, wherein an inner conical groove is formed in one end, close to the die core, of the die sleeve, the inner conical groove is communicated with an inner cavity of the die sleeve, an outer conical part is formed on one end, close to the die sleeve, of the die core body in a protruding mode, and the material injection channel is formed by a space clamped between the groove wall of the inner conical groove and the conical surface of the outer conical part.

9. The extruder die for producing cables according to claim 8, wherein the groove wall of the inner cone groove is in smooth transition connection with the end face of the die sleeve, and the outer cone part is in smooth transition connection with the end face of the die core body.