CN216182567U - Middle die sleeve, extrusion die and extruder of special catenary for overhead line - Google Patents
Middle die sleeve, extrusion die and extruder of special catenary for overhead line Download PDFInfo
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- CN216182567U CN216182567U CN202120985157.XU CN202120985157U CN216182567U CN 216182567 U CN216182567 U CN 216182567U CN 202120985157 U CN202120985157 U CN 202120985157U CN 216182567 U CN216182567 U CN 216182567U
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Abstract
The utility model discloses a middle die sleeve of a catenary special for an overhead line, wherein a die sleeve bearing diameter of the middle die sleeve is sequentially provided with a feeding cavity, a transition cavity and a sizing cavity along a discharging direction; the transition cavity is used for providing a buffer effect for the cable insulating material, and the low molding quality of the insulating material caused by overlarge extrusion pressure is avoided. The utility model provides a middle die sleeve of a catenary special for an overhead line, wherein a die sleeve bearing diameter of the middle die sleeve is sequentially provided with a feeding cavity, a transition cavity and a sizing cavity along a discharging direction. During extrusion molding, the cable insulation material passes through a feeding zone of a feeding cavity and a transition zone of a transition cavity, finally enters a sizing zone of a sizing cavity, and is molded in the sizing zone. Through setting up the transition die cavity, give cable insulation material extrusion moulding occasionally abundant buffering, avoid extrusion pressure too big to cause the shaping unstability of cable. Furthermore, the length and the time for fully shaping the insulating material are also given to the sizing area, so that the full shaping of the insulating material is ensured.
Description
Technical Field
The utility model relates to the technical field of cable molds, in particular to a middle mold sleeve, an extrusion mold and an extruder of a catenary special for an overhead line.
Background
The die used in the cable production mainly has three forms of extrusion, semi-extrusion and extrusion:
1. the die core of the extrusion die does not have a tubular die core bearing diameter, and the die core is contracted behind the die sleeve bearing diameter. The molten plastic is finally shaped by pressure through the die sleeve, and the extruded plastic layer has a compact structure and a smooth surface.
2. The mold core of the semi-extrusion pipe type mold has a tubular mold core bearing diameter, but the length is short. The end surface of the bearing diameter of the mold core is retracted into the end surface of the opening of the mold sleeve.
3. The die core of the tube-extruding die is provided with a tubular die core bearing diameter, and the end surface of the die core bearing diameter extends out of the end surface of the die sleeve opening or is flush with the end surface of the die sleeve opening. When the extrusion pipe type is extruded, due to the existence of the bearing diameter of the die core, the plastic is not directly pressed on the wire core, but moves forwards along the tubular outer wall of the bearing diameter of the die core, the plastic forms a tubular shape firstly, and then is stretched and then is coated on the wire core of the cable.
The applicant researches and discovers that the existing wire and cable mold has the following technical problems:
most cable products of overhead lines of 10KV and above do not have external shielding. Therefore, when the catenary is produced, the catenary nose is designed according to three-layer co-extrusion, and the catenary nose is provided with three feeding flow channels of inner shielding, outer shielding and insulation. Generally, during production, the mode of blocking the outer shielding runner is often selected to avoid the backflow of the outer shielding runner, but the existing mode easily causes the accumulation aging of the insulating material, and causes the quality problem.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical defects, the utility model provides a middle die sleeve, an extrusion die and an extruder of a special catenary for an overhead line.
In order to solve the problems, the utility model is realized according to the following technical scheme:
the utility model provides a middle die sleeve of a catenary special for an overhead line, wherein a die sleeve bearing diameter of the middle die sleeve is sequentially provided with a feeding cavity, a transition cavity and a sizing cavity along a discharging direction;
the transition cavity is used for providing a buffer effect for the cable insulating material, and the low molding quality of the insulating material caused by overlarge extrusion pressure is avoided.
Preferably, the feeding cavity is a circular truncated cone-shaped cavity, and an included angle between a cavity wall bus of the feeding cavity and the central line is 29.5-30.5 degrees.
Preferably, the included angle between the cavity wall generatrix of the feeding cavity and the central line is 30 degrees.
Preferably, the transition cavity is a circular truncated cone-shaped cavity, and an included angle between a cavity wall bus of the transition cavity and the central line is 19-20 degrees.
Preferably, the included angle between the cavity wall generatrix of the transition cavity and the central line is 19.5 degrees.
Preferably, the outer side of the middle die sleeve is provided with a mounting part for connecting and mounting.
Preferably, the depth of the sizing cavity is not less than 10 mm.
Preferably, the sizing cavity is a cylindrical cavity.
In a second aspect, the utility model further provides an extrusion die for the overhead wire dedicated catenary wire, and the extrusion die comprises the middle die sleeve of the overhead wire dedicated catenary wire of the first aspect.
In a third aspect, the utility model further provides an extruder for the overhead wire dedicated catenary wire, which comprises an extrusion die, wherein the extrusion die is provided with the middle die sleeve of the overhead wire dedicated catenary wire in the first aspect.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model provides a middle die sleeve of a catenary special for an overhead line, wherein a die sleeve bearing diameter of the middle die sleeve is sequentially provided with a feeding cavity, a transition cavity and a sizing cavity along a discharging direction. During extrusion molding, the cable insulation material passes through a feeding zone of a feeding cavity and a transition zone of a transition cavity, finally enters a sizing zone of a sizing cavity, and is molded in the sizing zone. Through setting up the transition die cavity, give cable insulation material extrusion moulding occasionally abundant buffering, avoid extrusion pressure too big to cause the shaping unstability of cable. Furthermore, the length and the time for fully shaping the insulating material are also given to the sizing area, so that the full shaping of the insulating material is ensured.
2. The feeding area of the feeding cavity and the sizing area of the sizing cavity are connected into a whole through the transition area of the transition cavity, so that the contact between the insulating material and the outer shielding runner is isolated, the leakage backflow of the insulating material is avoided, and the quality problem is avoided.
3. Through set up transition die cavity in the mould of well die sleeve holds the footpath, does not change the original structure of well die sleeve, can directly install when the die sleeve in the installation, need not do other improved design etc. and installation convenient to use is simple.
Drawings
Embodiments of the utility model are described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic cross-sectional view of a middle bushing of the special catenary suspension of the present invention;
FIG. 2 is a schematic structural view of an extrusion die of the present invention provided with a center die sleeve for overhead wire dedicated catenary;
in the figure:
10-middle die sleeve, 11-feeding die cavity, 12-transition die cavity, 13-sizing die cavity and 14-mounting part.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1 to 2, a preferred structure of the middle die set of the catenary suspension wire according to the present invention.
As shown in fig. 1, the middle die sleeve 10 includes a main body, a bearing diameter of the die sleeve penetrating the main body is disposed in the middle of the main body, and a feeding cavity 11, a transition cavity 12 and a sizing cavity 13 are sequentially disposed along a discharging direction in the bearing diameter of the die sleeve of the middle die sleeve. The utility model provides a buffer effect for the cable insulating material through the transition cavity, and avoids the low molding quality of the insulating material caused by overlarge extrusion pressure.
The working principle of the middle die sleeve of the special catenary for the overhead line is as follows:
during extrusion molding, the cable insulation material passes through a feeding zone of a feeding cavity and a transition zone of a transition cavity, finally enters a sizing zone of a sizing cavity, and is molded in the sizing zone. Through setting up the transition die cavity, give cable insulation material extrusion moulding occasionally abundant buffering, avoid extrusion pressure too big to cause the shaping unstability of cable. Furthermore, the length and the time for fully shaping the insulating material are also given to the sizing area, so that the full shaping of the insulating material is ensured. On the other hand, the feeding area of the feeding cavity and the sizing area of the sizing cavity are connected into a whole through the transition area of the transition cavity, so that the contact between the insulating material and the outer shielding runner is isolated, the leakage backflow of the insulating material is avoided, and the quality problem is avoided.
As shown in fig. 1, the feeding cavity 11 is a truncated cone-shaped cavity, and an included angle between a cavity wall generatrix of the feeding cavity and a central line is 29.5-30.5 °.
Preferably, the included angle between the cavity wall generatrix of the feeding cavity and the central line is 30 degrees.
In a preferred implementation, the transition cavity 12 is a circular truncated cone-shaped cavity, and an included angle between a cavity wall generatrix of the transition cavity and a central line is 19-20 °.
According to the utility model, the included angle between the cavity wall generatrix of the transition cavity 12 and the central line is preferably 19.5 degrees.
Preferably, the sizing cavity 13 is a cylindrical cavity. The depth of the sizing cavity is not less than 10 mm. The length of the sizing area is not less than 10mm, the length and the time for fully sizing the insulating material can be ensured, and the fully sizing of the insulating material is ensured.
As shown in FIG. 1, the outer side of the middle die sleeve is provided with a mounting part 14 for connecting and mounting. The mounting part is used for being connected and mounted on the extrusion die.
The utility model also provides an extrusion die of the overhead line special catenary, which comprises the middle die sleeve of the overhead line special catenary.
The utility model also provides an extruder of the overhead line special catenary, which comprises an extrusion die, wherein the extrusion die is provided with the middle die sleeve of the overhead line special catenary.
Other structures of the middle die sleeve, the extrusion die and the extruder of the catenary special for the overhead line are disclosed in the embodiment in the prior art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a well die sleeve of special catenary of overhead line which characterized in that:
the die sleeve bearing diameter of the middle die sleeve is sequentially provided with a feeding cavity, a transition cavity and a sizing cavity along the discharging direction;
the transition cavity is used for providing a buffer effect for the cable insulating material, and the low molding quality of the insulating material caused by overlarge extrusion pressure is avoided;
the transition cavity is a circular truncated cone-shaped cavity, and an included angle between a cavity wall bus of the transition cavity and the central line is 19-20 degrees.
2. The middle mold sleeve of the overhead line special catenary according to claim 1, further comprising:
the feeding cavity is a circular truncated cone-shaped cavity, and an included angle between a cavity wall bus of the feeding cavity and the central line is 29.5-30.5 degrees.
3. The middle mold sleeve of the overhead line special catenary according to claim 2, further comprising:
the included angle between the cavity wall generatrix of the feeding cavity and the central line is 30 degrees.
4. The middle mold sleeve of the overhead line special catenary according to claim 1, further comprising:
and the included angle between the cavity wall generatrix of the transition cavity and the central line is 19.5 degrees.
5. The middle mold sleeve of the overhead line special catenary according to claim 1, further comprising:
and the outer side of the middle die sleeve is provided with an installation part for connecting and installing.
6. The middle mold sleeve of the overhead line special catenary according to claim 1, further comprising:
the depth of the sizing cavity is not less than 10 mm.
7. The middle mold sleeve of the overhead line special catenary according to claim 6, further comprising:
the sizing cavity is a cylindrical cavity.
8. An extrusion die for the suspension wire dedicated for overhead wire, comprising the middle die set of the suspension wire dedicated for overhead wire according to any one of claims 1 to 7.
9. An extruder for an overhead wire-dedicated catenary wire, comprising an extrusion die provided with a middle die sleeve of the overhead wire-dedicated catenary wire according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120985157.XU CN216182567U (en) | 2021-05-10 | 2021-05-10 | Middle die sleeve, extrusion die and extruder of special catenary for overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120985157.XU CN216182567U (en) | 2021-05-10 | 2021-05-10 | Middle die sleeve, extrusion die and extruder of special catenary for overhead line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216182567U true CN216182567U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120985157.XU Active CN216182567U (en) | 2021-05-10 | 2021-05-10 | Middle die sleeve, extrusion die and extruder of special catenary for overhead line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216182567U (en) |
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2021
- 2021-05-10 CN CN202120985157.XU patent/CN216182567U/en active Active
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