CN211105500U

CN211105500U - Low smoke and zero halogen material extruder core reposition of redundant personnel structure

Info

Publication number: CN211105500U
Application number: CN201921395237.9U
Authority: CN
Inventors: 高利冲; 沈宏兵; 寿志光; 黄佳铁
Original assignee: Ningbo Feynman Cable Co ltd
Current assignee: Ningbo Feynman Cable Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-07-28
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses a low smoke and zero halogen material extrudes core reposition of redundant personnel structure includes sheath direction mould, core and external mold, the rear end at sheath direction mould is connected to the core, first central through-hole has been seted up in the sheath direction mould, second central through-hole has been seted up in the core, first central through-hole and the coaxial setting of second central through-hole communicate with each other, the outside at sheath direction mould and core is established to the external mold cover, the cavity has between external mold and sheath direction mould and the core, set up on the lateral wall of external mold with the communicating sizing material feed inlet of cavity, the communicating sizing material discharge gate with the cavity is seted up to the front end of external mold, the front end of first central through-hole is just to the sizing material discharge gate, the quantity of sizing material feed inlet is two, two sizing material feed inlet. The utility model discloses a two-way reposition of redundant personnel structure can effectively reduce the interior sizing material difference in the toroidal cavity, reduces sizing material flow resistance, improves the sizing material mobility, ensures to extrude the shaping effect of the sheath that obtains, guarantees product quality.

Description

Low smoke and zero halogen material extruder core reposition of redundant personnel structure

Technical Field

The utility model relates to a shielding data cable production is with reposition of redundant personnel structure specifically is a low smoke and zero halogen material extruder core reposition of redundant personnel structure.

Background

In the extrusion production process of the shielding data cable, the outer side of the cable coated with the aluminum foil is required to be coated with low-smoke halogen-free materials such as PE and PVC to form a sheath. The existing low-smoke halogen-free material extruder core shunting structure generally comprises a sheath guide die (namely an inner die), a core and an outer die, wherein the core is connected to the rear end of the sheath guide die, the outer die is arranged on the outer sides of the sheath guide die and the core, a cavity is formed between the outer die and the sheath guide die as well as between the outer die and the core, and a glue material inlet communicated with the cavity is formed in the outer die. During production, the cable coated with the aluminum foil passes through the machine core, enters the sheath guide die, penetrates out of the front end outlet of the sheath guide die, and is combined with the glue material which is extruded to the front end of the sheath guide die and is in a molten state and made of the low-smoke halogen-free material and coated on the outer side of the aluminum foil.

The low-smoke halogen-free material has lower melting point and poorer fluidity, while the current flow dividing structure of the extruder core of the low-smoke halogen-free material generally adopts a one-way flow dividing structure, namely, a sizing material feeding port is arranged on the outer die, and the sizing material of the low-smoke halogen-free material in a molten state is introduced into the cavity through the feeding port. The unidirectional flow distribution structure enables the temperature difference of the rubber in the cavity to be large, increases the flow resistance of the rubber, causes the surface of the sheath obtained by extrusion to crack, is difficult to detect through the thermal deformation of the cable, and causes the poor product.

Disclosure of Invention

The utility model aims to solve the technical problem that, to prior art not enough, provide a low smoke and zero halogen material extruder core reposition of redundant personnel structure, it adopts two-way reposition of redundant personnel structure, can effectively reduce the difference in temperature of sizing material in the annular cavity, reduces sizing material flow resistance, improves sizing material mobility, ensures to extrude the shaping effect of the sheath that obtains, guarantees product quality.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a low smoke and zero halogen material extrudes core reposition of redundant personnel structure, includes sheath direction mould, core and external mold, the core connect the rear end of sheath direction mould, sheath direction in seted up first central through-hole, the core in seted up second central through-hole, first central through-hole run through the length direction setting of sheath direction mould, second central through-hole run through the length direction setting of core, first central through-hole with the coaxial setting of second central through-hole and communicate with each other, the external mold cover establish the sheath direction mould with the outside of core, the external mold with sheath direction mould with the core between have a cavity, the lateral wall of external mold on seted up with the communicating sizing material feed inlet of cavity, the front end of external mold seted up with the communicating sizing material discharge gate of cavity, the front end of the first central through hole is right opposite to the rubber material discharge holes, the number of the rubber material feed holes is two, the two rubber material feed holes are symmetrically formed in the side wall of the outer die, and the cavity is an annular cavity.

The utility model discloses low smoke and zero halogen material extruder core reposition of redundant personnel structure adopts two-way reposition of redundant personnel structure, and two sizing material feed inlets are seted up to the symmetry on the lateral wall of external mold, introduce the sizing material in annular cavity simultaneously through two sizing material feed inlets, can effectively reduce the difference in temperature of sizing material in the annular cavity, reduce sizing material flow resistance, improve the sizing material mobility, ensure to extrude the shaping effect of the sheath that obtains, guarantee product quality.

Preferably, the two glue material feeding ports are respectively close to the middle part of the movement, and the outer surface of the middle upper part of the movement is an annular concave surface which is concave towards the axis of the movement. The annular concave surface can play a good flow guide effect, increase the size of the sizing material in the annular cavity and further reduce the temperature drop of the sizing material.

Preferably, first central through-hole around including coaxial setting and communicating first through-hole and second through-hole, the aperture of first through-hole be less than the aperture of second through-hole, the second through-hole in detachably coaxial be equipped with nonrust steel pipe, nonrust steel pipe one end with the front end parallel and level of second through-hole, nonrust steel pipe other end follow the rear end of second through-hole stretch out and penetrate second central through-hole, nonrust steel pipe's internal diameter with the aperture of first through-hole the same, just nonrust steel pipe's internal diameter and the cladding of shielding data cable have the diameter looks adaptation of the cable forming line of aluminium foil. The nonrust steel pipe can play better direction and guard action to the stranding line that the cladding has the aluminium foil, prevents the aluminium foil opening and the upwarp of stranding line when core and sheath direction mould to avoid extruding the strand phenomenon that plays on the sheath surface that obtains, guarantee the sheath roundness, improve the product quality and the production efficiency of shielding data cable. When the shielding data cables with different specifications are produced in an extrusion mode, the stainless steel pipe with the inner diameter matched with the diameter of the cabling line can be selected according to actual conditions to be assembled with the sheath guide die, and the inner diameter of the stainless steel pipe is about 0.5 mm larger than the diameter of the cabling line generally so as to meet the production requirements of the shielding data cables with different specifications.

Preferably, the rear end of the sheath guide die is integrally provided with a threaded part, and the threaded part is used for connecting the movement. Furthermore, the outer surface of the threaded part is processed with external threads. Because the sizing material flows through core and sheath direction mould in proper order, at the surface processing external screw thread of screw portion, make things convenient for the dismouting of core and sheath direction mould, can provide more spaces for the surface water conservancy diversion design of core simultaneously to make things convenient for the preparation of sheath direction mould.

Preferably, the sheath guide die is integrally provided with a radial convex ring at the front side of the threaded portion. In the assembling process, the radial convex ring plays an axial limiting role in the connection between the thread part and the machine core, and the damage of parts caused by excessive screwing pressure is prevented.

Preferably, the front part of the sheath guide die is provided with a tapered part with a small front part and a large rear part, the front part of the cavity is provided with a tapered cavity with a small front part and a large rear part, the tapered cavity is matched with the tapered part, and the tapered cavity is positioned on the outer side of the tapered part. In the extrusion process, when the rubber material flows through the sheath guide die, the flow resistance of the rubber material can be reduced by the conical part, and a better flow guide effect can be achieved by matching the design of the conical cavity, so that the rubber material smoothly flows to the rubber material discharge port.

Compared with the prior art, the utility model has the advantages of as follows: the utility model discloses a low smoke and zero halogen material extruder core reposition of redundant personnel structure adopts two-way reposition of redundant personnel structure, and two sizing material feed inlets are seted up to the symmetry on the lateral wall of external mold, introduce the sizing material in annular cavity simultaneously through two sizing material feed inlets, can effectively reduce the difference in temperature of sizing material in the annular cavity, reduce sizing material flow resistance, improve the sizing material mobility, ensure to extrude the shaping effect of the sheath that obtains, guarantee product quality.

Drawings

Fig. 1 is a schematic structural view of the flow dividing structure of the low-smoke halogen-free material extruder core of the present invention;

fig. 2 is a schematic structural view of a sheath guide die in the shunting structure of the low-smoke halogen-free material extruder core of the present invention;

fig. 3 is the assembly schematic diagram of sheath guide die and stainless steel tube in the shunting structure of the low smoke zero halogen extruder core of the utility model.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The low-smoke halogen-free material extrusion machine core shunting structure of the embodiment comprises a sheath guide die 1, a machine core 2 and an outer die 3, wherein the machine core 2 is connected at the rear end of the sheath guide die 1, a first central through hole is formed in the sheath guide die 1, a second central through hole 21 is formed in the machine core 2, the first central through hole penetrates through the sheath guide die 1 in the length direction, the second central through hole 21 penetrates through the machine core 2 in the length direction, the first central through hole and the second central through hole 21 are coaxially arranged and communicated, the outer die 3 is sleeved on the outer sides of the sheath guide die 1 and the machine core 2, a cavity 4 is formed between the outer die 3 and the sheath guide die 1 and the machine core 2, two rubber material feeding ports 31 communicated with the cavity 4 are formed in the side wall of the outer die 3, the two rubber material feeding ports 31 are symmetrically formed in the side wall of the outer die 3, a rubber material discharging, the front end of the first central through hole is right opposite to the rubber material discharge hole 32, and the cavity 4 is an annular cavity 4.

In this embodiment, the two glue material inlets 31 are respectively close to the middle part of the movement 2, and the outer surface of the middle upper part of the movement 2 is an annular concave surface 22 concave to the axis of the movement 2.

In this embodiment, the first central through hole includes a first through hole 11 and a second through hole 12 coaxially disposed and communicated with each other, the aperture of the first through hole 11 is smaller than the aperture of the second through hole 12, a stainless steel tube 5 is coaxially assembled in the second through hole 12 in a detachable manner, one end of the stainless steel tube 5 is flush with the front end of the second through hole 12, the other end of the stainless steel tube 5 extends out of the rear end of the second through hole 12 and penetrates into the second central through hole 21, the inner diameter of the stainless steel tube 5 is the same as the aperture of the first through hole 11, and the inner diameter of the stainless steel tube 5 is adapted to the diameter of an aluminum foil-coated cabling (not shown in the figure) of the shielded data cable.

In the embodiment, the front part of the sheath guide die 1 is provided with a tapered part 13 with a small front part and a large rear part, the front part of the cavity 4 is provided with a tapered cavity 41 with a small front part and a large rear part, which is matched with the tapered part 13, and the tapered cavity 41 is positioned on the outer side of the tapered part 13; a thread part 14 is integrally arranged at the rear end of the sheath guide die 1, an external thread is processed on the outer surface of the thread part 14, and the thread part 14 is used for connecting the movement 2; a radial projecting ring 15 is integrally provided on the front side of the threaded portion 14 of the sheath guide die 1.

The shunting structure of the low-smoke halogen-free material extruder core adopts a bidirectional shunting structure, and is combined with the structural improvement of the sheath guide die 1 and the core 2, so that the flowability of rubber in the annular cavity 4 can be effectively improved, the forming effect of the extruded sheath is ensured, the sheath is prevented from cracking, and the extrusion production speed of the shielding data cable is increased to 80 m/min from the original 30 m/min, and therefore the product quality and the production efficiency of the shielding data cable are effectively improved.

Claims

1. The utility model provides a low smoke and zero halogen material extrudes core reposition of redundant personnel structure, includes sheath direction mould, core and external mold, the core connect the rear end of sheath direction mould, sheath direction in seted up first central through-hole, the core in seted up second central through-hole, first central through-hole run through the length direction setting of sheath direction mould, second central through-hole run through the length direction setting of core, first central through-hole with the coaxial setting of second central through-hole and communicate with each other, the external mold cover establish the sheath direction mould with the outside of core, the external mold with sheath direction mould with the core between have a cavity, the lateral wall of external mold on seted up with the communicating sizing material feed inlet of cavity, the front end of external mold seted up with the communicating sizing material discharge gate of cavity, the front end of the first central through hole is right opposite to the rubber material discharge holes, and the rubber material discharging hole forming device is characterized in that the number of the rubber material feed holes is two, the two rubber material feed holes are symmetrically formed in the side wall of the outer die, and the cavity is an annular cavity.

2. The low smoke zero halogen material extruder core shunting structure of claim 1, characterized in that two said sizing material feed inlets are close to the middle part of the said core respectively, the external surface of the middle upper portion of the said core is the annular concave surface concave towards the axis of the said core.

3. A low smoke and zero halogen material extruder core reposition of redundant personnel structure of claim 1, a serial communication port, first central through-hole around including coaxial setting and communicating first through-hole and second through-hole, the aperture of first through-hole be less than the aperture of second through-hole, the second through-hole in the coaxial nonrust steel pipe that is equipped with of detachably, the one end of nonrust steel pipe with the front end parallel and level of second through-hole, the other end of nonrust steel pipe follow the rear end of second through-hole stretch out and penetrate second central through-hole, the internal diameter of nonrust steel pipe with the aperture of first through-hole the same, just the internal diameter of nonrust steel pipe and the diameter looks adaptation that has the cable-forming line of aluminium foil of the cladding of shielding data cable.

4. The low smoke zero halogen material extruder core shunting structure of claim 3, characterized in that the rear end of the sheath guide die is integrally provided with a threaded portion, and the threaded portion is used for connecting the core.

5. The low smoke zero halogen material extruder core shunting structure of claim 4, characterized in that the outer surface of the threaded portion is provided with external threads.

6. The low smoke zero halogen material extruder core shunting structure of claim 5, characterized in that a radial bulge loop is integrally arranged on the front side of the threaded portion on the sheath guide die.

7. The low smoke zero halogen material extruder core shunting structure of claim 1, characterized in that the front of the sheath guide die is provided with a taper portion with a small front and a large rear, the front of the cavity is provided with a taper cavity with a small front and a large rear, which is matched with the taper portion, and the taper cavity is located at the outer side of the taper portion.