CN213440771U

CN213440771U - Positioning pin structure and mold

Info

Publication number: CN213440771U
Application number: CN202021975581.8U
Authority: CN
Inventors: 王金洲; 吴雪贞; 林亮伟; 陈澜; 蔡瑜瑜
Original assignee: Schneider Electric Xiamen Switch Equipment Co ltd
Current assignee: Schneider Electric Xiamen Switch Equipment Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-06-15
Anticipated expiration: 2030-09-10

Abstract

The utility model provides a locating pin structure and mould, the locating pin structure sets up on the mould and is used for connecting the inserts, the locating pin structure includes: the first end of the connecting column is connected with the die, the second end of the connecting column extends into the forming cavity of the die, and a plurality of bosses are arranged at intervals along the circumferential direction at the second end of the connecting column; the insert comprises a butt joint face, the insert further comprises a connecting hole formed in the butt joint face, the connecting hole is sleeved on the second end of the connecting column and connected with the boss in an interference fit mode, and the butt joint face is connected with a forming cavity of the mold in a butt joint mode. By the aid of the technical scheme, the positioning pin structure and the die can be realized, epoxy resin is prevented from overflowing into the connecting hole of the insert, and the insert is prevented from bouncing in the forming process.

Description

Positioning pin structure and mold

Technical Field

The utility model relates to a locating pin structure and mould.

Background

The vacuum arc extinguish chamber is an important component in the vacuum circuit breaker, and comprises an airtight insulating shell made of epoxy resin, a movable end cover plate, a static end cover plate and a stainless steel corrugated pipe, wherein the airtight insulating shell is composed of a plurality of airtight insulating layers. An epoxy resin airtight insulating shell of the vacuum arc-extinguishing chamber is molded by casting through an APG (advanced plasma generator) process, an insert is required to be arranged on the epoxy resin airtight insulating shell of the vacuum arc-extinguishing chamber and used for forming a threaded hole and being connected with other elements, and the insert is required to be positioned in a mold.

The location of inserts usually adopts the locating pin location among the prior art, the locating pin sets up in the mould, the blind hole of inserts cup joints on the locating pin, wherein, be connected with two kinds of condition between inserts and the locating pin, one is adopting clearance fit to connect, under this kind of connected mode, epoxy gets into the blind hole easily in the forming process, it needs additionally to clear up the operation, it is extravagant man-hour still can harm the inserts, it adopts interference fit to connect secondly, under this kind of connected mode, lead to the inserts to bounce in the forming process easily, lead to the product to scrap.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the above-mentioned prior art, provide a locating pin structure and mould, prevent that the epoxy overflow from advancing the connecting hole of inserts and preventing that the inserts from bounceing at the forming process.

In order to solve the technical problem, the utility model provides a locating pin structure, the locating pin structure sets up on the mould and is used for connecting the inserts, include:

the first end of the connecting column is connected with the die, the second end of the connecting column extends into the forming cavity of the die, and a plurality of bosses are arranged at intervals along the circumferential direction at the second end of the connecting column;

the insert comprises a butt joint face, the insert further comprises a connecting hole formed in the butt joint face, the connecting hole is sleeved on the second end of the connecting column and connected with the boss in an interference fit mode, and the butt joint face is connected with a forming cavity of the mold in a butt joint mode.

Preferably, the second end of spliced pole includes along the axial and connects gradually and towards cooperation section and the linkage segment that the shaping chamber extends, the boss interval sets up on the cooperation section, the linkage segment stretches into in the connecting hole.

Preferably, the radial dimension of the mating section is greater than the radial dimension of the connecting section.

Preferably, the connecting hole comprises a first hole section and a second hole section which are sequentially far away from the abutting surface, the first hole section is connected with the boss, and the second hole section is connected with the connecting section.

Preferably, the connecting column further comprises a limiting step, and the limiting step is used for abutting against the abutting surface and limiting the axial movement of the insert.

Preferably, the limiting step is flush with the surface of the molding cavity or lower than the surface of the molding cavity.

Preferably, the first end of the connecting column is provided with a threaded hole, and the threaded hole is connected with the die.

The utility model also provides a mould, include locating pin structure.

Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:

the insert and the positioning pin structure are in interference fit at the boss, the other places are in clearance fit, the interference fit ensures that the insert is assembled in place, the surface of the insert and the molding cavity is attached tightly without clearance, and relative movement is avoided between the insert and the positioning pin structure in the molding process, so that feeding and bouncing are avoided.

Drawings

Fig. 1 is a partially enlarged schematic view of a mold according to a preferred embodiment of the present invention;

FIG. 2 is a schematic perspective view of the pin structure and groove bottom wall connection in a preferred embodiment of the invention;

FIG. 3 is a schematic perspective view of the pin structure, insert and groove bottom connection in a preferred embodiment of the present invention;

FIG. 4 is a schematic perspective view of a detent pin structure according to a preferred embodiment of the present invention;

FIG. 5 is a schematic plan view of a dowel configuration in a preferred embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of an insert according to a preferred embodiment of the present invention.

Detailed Description

The invention is further described with reference to the drawings and the detailed description.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below", and other directional terms, will be understood to have their normal meaning and refer to those directions as they normally relate to when viewing the drawings. Unless otherwise indicated, the directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.

The terms "first," "second," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

Referring to fig. 1 to 6, a mold 100 includes a first molding die 11, a second molding die (not shown), and a third molding die 13, where the first molding die 11, the second molding die, and the third molding die 13 are assembled to define a molding cavity 14, the first molding die 11 and the second molding die are assembled right and left to define a groove cavity 141 of the molding cavity 14, and the third molding die 13 includes a groove bottom wall 142 that closes the groove cavity 141. In the present embodiment, four molding cavities 14 are provided at intervals, during molding, workpieces 200 are respectively placed in the molding cavities 14, the workpieces 200 are vacuum arc-extinguishing chambers, the space between the workpieces 200 and the surface of the molding cavities 14 is filled with epoxy resin, during molding, the workpieces 200 are required to be provided with a plurality of inserts 15 adjacent to the groove bottom wall 142, the inserts 15 are made of metal, and after molding, the inserts 15 are embedded in the epoxy resin.

The mold 100 further includes a plurality of positioning pin structures 16, each positioning pin structure 16 is connected to an insert 15, specifically, the positioning pin structures 16 are disposed on the groove bottom wall 142, and the positioning pin structures 16 are used for connecting the inserts 15 and positioning the inserts 15 in the molding process of the workpiece 200.

The locating pin structure 16 includes a connecting column 161, an extending hole is formed in the groove bottom wall 142, a bolt is arranged on the bottom wall of the extending hole, a threaded hole 1613 is formed in a first end 1611 of the connecting column 161, the first end 1611 of the connecting column 161 extends into the extending hole and is screwed on the bolt, a second end 1612 of the connecting column 161 extends into the forming cavity 14 of the mold 100, a plurality of bosses 1614 are arranged at intervals along the circumferential direction at the second end 1612 of the connecting column 161, and in this embodiment, the bosses 1614 are evenly arranged at intervals at the second end 1612 of the connecting column 161. The insert 15 includes a butt surface 151, the insert 15 further includes a connection hole 152 provided on the butt surface 151, the connection hole 152 is sleeved on the second end 1612 of the connection column 161 and is connected with the boss 1614 in an interference fit manner, the butt surface 151 is abutted against the molding cavity 14 of the mold 100, and specifically, the butt surface 151 is abutted against the groove bottom wall 142.

After the boss 1614 and the connecting hole 152 are in interference fit, the insert 15 can be installed in place, the insert 15 is attached to the bottom wall 142 of the groove and cannot be separated from the groove, in the forming process, relative movement cannot occur between the insert 15 and the positioning pin structure 16, therefore, epoxy resin cannot enter the connecting hole 152 of the insert 15, the positioning pin cannot bounce in the forming process, and the workpiece 200 is scrapped, after forming is finished, because only the boss 1614 is in interference fit connection between the insert 15 and the connecting column 161, when the workpiece 200 is taken down, required force is smaller, and the insert 15 can be more easily taken down from the connecting column 161 after forming is finished.

Second end 1612 of spliced pole 161 includes along the axial and connects gradually and towards cooperation section 1616 and linkage segment 1615 that becomes die cavity 14 and extend, boss 1614 interval sets up on cooperation section 1616, linkage segment 1615 stretches into in the connecting hole 152, the link with connecting hole 152 clearance fit connects, linkage segment 1615 can be when inserts 15 receives the power of radial deflection, plays the effect of support.

Because the insert 15 is located adjacent to the abutting surface 151 and is subjected to a larger force, the radial dimension of the fitting section 1616 is larger than the radial dimension of the connecting section 1615, which can increase the stability of the connection between the insert 15 and the connecting column 161, the connecting hole 152 includes a first hole section 1521 and a second hole section 1522 located away from the abutting surface 151 in sequence, the first hole section 1521 is connected to the boss 1614, the second hole section 1522 is connected to the connecting section 1615, and the second hole section 1522 is in clearance fit connection with the connecting section 1615.

The attachment post 161 further comprises a retention step 1617 disposed adjacent the mating segment 1616, the retention step 1617 for abutting the abutment surface 151 and limiting axial movement of the insert 15. In the embodiment, the limiting step 1617 is flush with the surface of the molding cavity 14 or lower than the surface of the molding cavity 14, and the limiting step 1617 can be used as a positioning reference between the connecting column 161 and the bottom wall 142, so as to prevent the connecting column 161 from extending into the molding cavity 14 too much or too little.

During the installation of the dowel pin arrangement 16, the operator first inserts the connecting stud 161 into the access hole and screws it onto the bolt, and the operator can adjust the installation position of the connecting stud 161 by means of the limiting step 1617, until the limiting step 1617 is below the bottom wall 142 of the groove or flush with the bottom wall 142 of the groove. Subsequently, an operator connects the connecting hole 152 of the insert 15 to the connecting column 161 correspondingly, the first hole section 1521 is connected to the fitting section 1616, the second hole section 1522 is connected to the connecting section 1615, the first hole section 1521 is connected to the boss 1614 of the fitting section 1616 in an interference fit manner, and the second hole section 1522 is connected to the connecting section 1615 in a clearance fit manner. After the positioning pin structure 16 is connected with the insert 15, an operator places the workpiece 200 on the bottom wall 142 of the groove, closes the first forming die 11, the second forming die and the third forming die 13, injects epoxy resin into the forming cavity 14, and after a period of time, the workpiece 200 can be taken down by opening the die, at the moment, the operator can directly take the workpiece 200 down from the bottom wall 142 of the groove, the insert 15 is only connected with the boss 1614 in an interference fit manner, and is convenient to take down, and in subsequent processing, the insert 15 processes threads at the second hole section 1522 of the connecting hole 152 without cleaning the epoxy resin overflowing into the connecting hole 152.

The above, only be the preferred embodiment of the present invention, but the design concept of the present invention is not limited to this, and any skilled person familiar with the technical field is in the technical scope disclosed in the present invention, and it is right to utilize this concept to perform insubstantial changes to the present invention, all belong to the act of infringing the protection scope of the present invention.

Claims

1. A locating pin structure, the locating pin structure sets up on the mould and is used for connecting the inserts, its characterized in that includes:

2. The locating pin structure of claim 1, wherein: the second end of spliced pole includes along the axial cooperation section and the linkage segment that connects gradually and extend towards the shaping chamber, the boss interval sets up on the cooperation section, the linkage segment stretches into in the connecting hole.

3. The locating pin structure of claim 2, wherein: the radial dimension of the mating section is greater than the radial dimension of the connecting section.

4. The locating pin structure of claim 2, wherein: the connecting hole is including keeping away from in proper order first hole section and the second hole section that the butt face set up, first hole section is connected the boss, second hole section is connected the linkage segment.

5. The locating pin structure of claim 2, wherein: the connecting column further comprises a limiting step, and the limiting step is used for abutting against the abutting surface and limiting the axial movement of the insert.

6. The dowel structure of claim 5, wherein: the limiting step is flush with the surface of the molding cavity or lower than the surface of the molding cavity.

7. The locating pin structure of claim 1, wherein: the first end of the connecting column is provided with a threaded hole, and the threaded hole is connected with the die.

8. A mold, characterized in that: comprising a locating pin structure according to any one of claims 1 to 7.