CN110842088A

CN110842088A - Sizing die

Info

Publication number: CN110842088A
Application number: CN201911293968.7A
Authority: CN
Inventors: 计中华
Original assignee: Jiangsu Etern Co Ltd
Current assignee: Jiangsu Etern Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-02-28

Abstract

The invention discloses a sizing die which comprises an upper die and a lower die which are arranged in a split mode, wherein arc-shaped grooves are formed in the side faces of the upper die and the lower die respectively, after the upper die and the lower die are assembled, the arc-shaped grooves are spliced to form a sizing hole for a cable core and a metal belt to penetrate through, and a plurality of ball springs are embedded in the surface of each arc-shaped groove. According to the invention, the metal belt is compacted at the outer side of the cable core through the ball spring, so that on one hand, the inaccurate size of a sizing die can be prevented, and on the other hand, the water seepage condition caused by a gap between the metal belt and the cable core can be prevented; and because the sizing die is the components of a whole that can function independently structure by upper and lower mould, when the sizing die appears local damage, can need to change upper mould or lower mould, need not to change whole sizing die, reducible maintenance cost, and when changing, can directly take out upper mould or lower mould that will change again with upper die or lower mould that need take out can, it is comparatively convenient to operate.

Description

Sizing die

Technical Field

The invention relates to the field of molds for producing optical cables, in particular to a sizing mold.

Background

In the production process of the optical cable, a longitudinal covering layer for protecting the cable core is required to be covered outside the cable core, the longitudinal covering layer is longitudinally covered and formed by a metal band (an aluminum-plastic composite band or a steel band), the longitudinal covering and forming is realized by a forming shoe, a preforming die, an overlapping die and a sizing die device, wherein the sizing die device is used for deforming a flat metal band into a tubular structure when the metal band passes through a longitudinal covering die, an irregular bulge, namely a common lotus leaf edge, formed by two longitudinally covered and overlapped edges of the metal band is repaired, after the longitudinal covering and forming by the sizing die device, an original strip is formed into a complete cylinder, so that the cable core structure is compact, the process size of the cable core is reduced, and finally, the tight covering of the cable core is sent to an extrusion molding machine head for finished product extrusion molding.

In the sizing die in the prior art, a sizing hole with a corresponding aperture is usually processed on an entity material according to the outer diameter of a cable core at a measuring position after metal strips are lapped and form a tubular structure, so that the cable core with one specification corresponds to the sizing die with a specific size, the sizing die is usually pre-processed before starting, and the cable core directly passes through the sizing hole of the sizing die during use.

However, due to the fact that the sizing die is of an integrated structure, after the sizing die is partially damaged, the whole sizing die needs to be replaced, and the sizing die needs to be stopped and broken to replace the sizing die during replacement, replacement and maintenance cost is high, and the replacement process is complicated.

In addition, the existing sizing die cannot compact the metal belt coated on the outer side outside the cable core according to the size of the cable core, a gap exists between the cable core and the outer side of the metal belt, and the water seepage condition occurs in the process of lapping the metal belt.

Disclosure of Invention

The invention aims to provide a sizing die which can compact the lap of a metal belt while the metal belt longitudinally wraps a cable core, prevent the water seepage at the lap and can be conveniently replaced in the production process.

In order to solve the technical problem, the invention provides a sizing die which comprises an upper die and a lower die which are arranged in a split mode, wherein arc-shaped grooves are formed in the side faces of the upper die and the lower die respectively, after the upper die and the lower die are assembled, the arc-shaped grooves are spliced to form a sizing hole through which a cable core and a metal belt pass, and a plurality of ball springs are embedded in the surface of each arc-shaped groove.

In a preferred embodiment of the present invention, the ball spring further includes a base embedded in the arc-shaped groove, the base is internally provided with a spring and a ball, the ball is fixedly arranged at an end of the spring, and an end surface of the ball protrudes out of the arc-shaped groove.

In a preferred embodiment of the present invention, a dovetail type connecting structure is disposed at a mold closing connection position of the upper mold and the lower mold.

In a preferred embodiment of the present invention, the dovetail type connecting structure further comprises a dovetail groove and a dovetail matched with the dovetail groove.

In a preferred embodiment of the present invention, the method further includes protruding a stopping step on the outer peripheral surface of the sizing die.

In a preferred embodiment of the present invention, the upper mold and the lower mold are both semicircular ring structures.

In a preferred embodiment of the present invention, the sizing hole is a circular sizing hole.

In a preferred embodiment of the present invention, the ball further comprises a smooth and burr-free surface.

The invention has the beneficial effects that:

1. according to the sizing die, the plurality of ball springs are embedded in the inner surface of the sizing hole, and the metal belt is compacted on the outer side of the cable core through the ball springs in the process of longitudinally wrapping the metal belt on the outer side of the cable core, so that the sizing die used is prevented from being inaccurate in size, and a gap is prevented from being formed between the metal belt and the cable core to prevent water seepage.

2. The sizing die adopts the upper die and the lower die which are arranged in a split way, the upper die and the lower die are buckled together to form the sizing hole for the cable core to pass through when in use, and the sizing die is of a split structure consisting of the upper die and the lower die, so that when the sizing die is locally damaged, the upper die or the lower die can be replaced without replacing the whole sizing die, the maintenance cost can be reduced, and the operation is more convenient.

Drawings

FIG. 1 is a schematic view of the sizing die of the present invention;

fig. 2 is a schematic view of the structure of the ball spring of the present invention.

The reference numbers in the figures illustrate: 1. an upper die; 2. a lower die; 3. an arc-shaped slot; 4. sizing holes; 5. a ball spring; 51. a base; 52. a spring; 53. a ball bearing; 6. a dovetail type connecting structure; 61. a dovetail groove; 62. dovetail joints; 7. and stopping the step.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1, an embodiment of the sizing die of the present invention includes an upper die 1 and a lower die 2 which are separately arranged, the side surfaces of the upper die 1 and the lower die 2 are respectively provided with an arc-shaped groove 3, and a sizing hole 4 for a cable core and a metal tape to pass through is formed after the upper die 1 and the lower die 2 are assembled, because the sizing die is a separate structure formed by the upper die 1 and the lower die 2, when the sizing die is locally damaged, the upper die 1 or the lower die 2 can be replaced without replacing the whole sizing die, so that maintenance cost can be reduced, and operation is convenient; the surface of arc wall 3 inlays and is equipped with a plurality of ball spring 5, indulges the in-process of package in the cable core outside with the strap, compacts the strap in the outside of cable core through ball spring 5, and on the one hand can prevent that the sizing die size that uses is inaccurate, and on the other hand can prevent to have the space between strap and the cable core, the condition of infiltration appears.

Referring to fig. 2, the ball spring 5 includes a base 51 embedded in the arc-shaped groove 3, the base 51 is integrally formed with the arc-shaped groove 3, a spring 52 and a ball 53 are arranged in the base 51, an inner end of the spring 52 is fixed at the bottom of the base 51, the ball 53 is fixedly arranged at an outer end of the spring 52, an end surface of the ball 53 protrudes out of the arc-shaped groove 3, when the metal tape and the cable core pass through the sizing hole 4, the ball 53 can press the metal tape on the outer side of the cable core by the pressure of the spring 52 while rolling, and in order to prevent the ball 53 from scratching the metal tape, the surface of the ball 53 is smooth and burr-free.

In order to fix the upper die 1 and the lower die 2 in a matched mode, a dovetail type connecting structure 6 is arranged at the matched-mode connecting position of the upper die 1 and the lower die 2, the dovetail type connecting structure 6 comprises a dovetail groove 61 and a dovetail 62 matched with the dovetail groove 61, when the upper die 1 is provided with the dovetail groove 61, the lower die 2 is provided with the dovetail 62 matched with the dovetail groove 61, when the upper die 1 is provided with the dovetail 62, the lower die 2 is provided with the dovetail groove 61 matched with the lower die 2, the dovetail 62 is longitudinally inserted into the dovetail groove 61 in a sliding mode, matched-mode splicing of the upper die 1 and the lower die 2 is achieved, and meanwhile, the radial expansion of the sizing hole 4 can be prevented.

Specifically, the outer peripheral surface of the sizing die is convexly provided with a stopping step 7, and the stopping step 7 is matched with a corresponding tool to prevent axial sliding.

Specifically, go up mould 1 and lower mould 2 and be the semicircle ring structure, after going up mould 1 and lower mould 2 die sinking, guarantee that the die sinking radius is the biggest, be convenient for take off from the cable core and the strap outside with last mould 1 and lower mould 2.

Preferably, the cable core is a circular cable core, and the sizing hole 4 of this embodiment is also a circular sizing hole 4

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims

1. The utility model provides a sizing die, its characterized in that, includes last mould and the lower mould that the components of a whole that can function independently set up, the side of going up mould and lower mould has the arc wall respectively, go up mould and lower mould compound die after, the arc wall concatenation forms the sizing hole that supplies cable core and strap to pass, the surface of arc wall is inlayed and is equipped with a plurality of ball spring.

2. A sizing die according to claim 1, wherein the ball spring comprises a base embedded in an arc-shaped groove, a spring and a ball are arranged in the base, the ball is fixedly arranged at the end part of the spring, and the end surface of the ball protrudes out of the arc-shaped groove.

3. A sizing die according to claim 1, wherein a dovetail type connecting structure is arranged at the die assembly joint of the upper die and the lower die.

4. A sizing die according to claim 3 wherein the dovetail connection comprises a dovetail slot and a dovetail arranged to mate with the dovetail slot.

5. A sizing die according to claim 1, wherein the sizing die is provided with a stop step protruding from the outer peripheral surface of the sizing die.

6. A sizing die according to claim 1 wherein the upper and lower dies are of semi-circular ring configuration.

7. A sizing die according to claim 1 wherein said sizing hole is a circular sizing hole.

8. A sizing die according to claim 2 wherein the surface of the balls is smooth and burr free.