Special die for forming insulating joint

Abstract

The utility model discloses a special mould for forming an insulated joint, which comprises a mould body, a plurality of positioning grooves for accommodating the insulated joint are arranged on the mould body, a plurality of bolts for positioning the insulated joint are arranged in each positioning groove, a limit rod is movably arranged at the bottom of the mould body below the bolts, and the limit rod is arranged on the mould body. When the limiting rod is horizontally inserted into the bottom of the mold body, the bolt can be limited, and after the limiting rod is horizontally pulled out, the bolt can fall off from the mold body. According to the utility model, parts are simple and convenient to replace and maintain, the maintenance time is short, and the production efficiency of the insulating joint can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of steel rail insulating joint production technology, and in particular relates to a special mold for forming insulating joints. Background Technology

[0002] Insulated rail joints are located at the rail joints at both ends of a block section of a railway line. They serve a dual purpose: first, to delineate track circuit sections and separate adjacent track circuits; and second, to firmly connect two rails together using clamps and bolts. They must withstand the vertical and lateral forces exerted on the joint when a train passes, as well as the temperature forces generated by thermal expansion and contraction. Therefore, they must possess sufficient mechanical properties. Due to the laying of rails and the development of seamless tracks that cross sections and include turnouts, insulated rail joints are widely used in my country.

[0003] Insulating joints generally adopt a "sandwich" structure, with an insulating layer sandwiched between two steel plates. For example, a seamless railway track insulating joint disclosed in Chinese Patent Publication No. CN202298378U uses an insulating fishtail plate composed of a clamping plate, an insulating layer plate, and a protective plate. The insulating layer plate is composed of four layers of PK4080 epoxy film and three layers of alkali-free fiberglass cloth stacked alternately. Because the insulating fishtail plate has an arc-shaped structure, positioning is difficult. Therefore, to solve this problem, Chinese Patent Publication No. CN202607885U discloses a special mold for insulating joints. In this solution, the positioning action surface of the mold is arc-shaped, which can solve the positioning problem of the insulating joint. Moreover, this solution is equipped with a high-strength bolt assembly and a specially made high-temperature and high-torque disc spring to form a locking and anti-loosening device, which solves the problem of locking the insulating joint. However, the high-strength bolt assembly in this solution is fixed on the mold positioning body. After repeated high-temperature operations, the high-strength bolt assembly may experience fatigue fracture, bending deformation, and thread damage. Once the bolt is damaged, the mold needs to be removed from the production equipment, the plate at the bottom of the mold positioning body needs to be removed, and the bolt needs to be replaced. Replacement is difficult and time-consuming, which is not conducive to the operation of the production line and will reduce the production efficiency of the production line.

[0004] Therefore, it is necessary to provide a special mold for forming insulating joints to solve the above-mentioned technical problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a special mold for forming insulating joints, which makes the replacement and maintenance of parts simple and convenient, and the maintenance time is short, thereby improving the production efficiency of insulating joints.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a special mold for forming insulating joints, comprising a mold body, wherein the mold body is provided with a plurality of positioning grooves for accommodating insulating joints, and a plurality of bolts for positioning insulating joints are provided in each positioning groove. A limiting rod is movably provided at the bottom of the mold body below the bolts. When the limiting rod is horizontally inserted into the bottom of the mold body, it can limit the bolts. When the limiting rod is horizontally pulled out, the bolts can fall off the mold body.

[0007] Furthermore, the wall of the positioning groove is an arc-shaped contoured surface, and the arc-shaped contoured surface is partially contoured to the outer periphery of the insulating joint.

[0008] Furthermore, a bushing is fitted around the outer periphery of the bolt at the position where it contacts the arc-shaped contoured surface of the positioning groove.

[0009] Furthermore, the head of the bolt faces downward and is located below the mold body, the bolt shank faces upward and extends upward towards the positioning groove, and the mold body is provided with a plurality of first through holes for the bolt to pass through.

[0010] Furthermore, a disc spring and a nut are provided on the bolt's thread, with the disc spring located below the nut.

[0011] Furthermore, the bottom of the mold body is provided with several pairs of limiting blocks, each pair of limiting blocks being located on both sides of the head of the bolt.

[0012] Furthermore, mounting blocks for mounting the limiting rod are provided on the front and rear sides of the bottom of the mold body, and the mounting blocks are provided with mounting holes for the limiting rod to pass through horizontally.

[0013] Furthermore, one end of the limiting rod is provided with a handle extending out of the side of the mold body.

[0014] Furthermore, each of the positioning slots in the mold body is provided with a push rod that moves up and down, and the positioning slot is provided with a countersunk hole for installing the push rod. The lower end of the mold body is provided with a lifting drive component for lifting the push rod upward.

[0015] Furthermore, three positioning slots are arranged side by side, and six bolts are arranged in each positioning slot. Six limiting rods extend along the Y direction, and each limiting rod simultaneously limits the three bolts in the Y direction.

[0016] Compared with existing technologies, the beneficial effects of this utility model's special mold for forming insulating joints are as follows: A limiting rod is movably installed at the bottom of the mold body. Inserting the limiting rod into the bottom of the bolt limits its position, ensuring the stability of the insulating joint's positioning. If a bolt is damaged, the limiting rod below the corresponding bolt can be pulled out, causing the bolt to fall off. A new bolt can then be replaced, and the limiting rod can be inserted again to limit the new bolt. Bolt replacement is simple and convenient, and it does not require removing the special mold from the production equipment, saving time. Therefore, the special mold provided by this solution simplifies and facilitates component replacement and maintenance, reduces maintenance time, and improves the production efficiency of insulating joints. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the top structure of the special mold for forming insulating joints according to an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the bottom structure of the special mold for forming insulating joints according to an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the special mold for forming insulating joints according to an embodiment of the present invention, which has a lifting drive component at the bottom;

[0020] The numbers in the image represent:

[0021] 2-Special mold for forming insulating joints, 21-Mold body, 211-First through hole, 212-Push rod, 213-Counterhead hole, 22-Positioning groove, 23-Bolt, 24-Limit rod, 241-Handle, 25-Disc spring, 26-Nut, 27-Busset, 28-Limit block, 29-Mounting block, 291-Mounting hole, 210-Lifting drive component, 2101-Lifting cylinder, 2102-Lifting plate, 900-Insulating joint. Detailed Implementation

[0022] Please refer to Figures 1-3 This embodiment is a special mold 2 for forming insulating joints, which includes a mold body 21. The mold body 21 is provided with a plurality of positioning grooves 22 for accommodating insulating joints 900. Each positioning groove 22 is provided with a plurality of bolts 23 for positioning the insulating joints 900. A limiting rod 24 is movably provided at the bottom of the mold body 21 below the bolts 23 to limit the bolts 23. After the limiting rod 24 is removed from below the bolts 23, the bolts 23 can fall off the mold body 21.

[0023] Several positioning grooves 22 extend along the X direction, and the groove wall of the positioning groove 22 is an arc-shaped contour surface. The arc-shaped contour surface is set in a contour-like manner with part of the outer periphery of the insulating joint 900, which facilitates the positioning of the insulating joint 900.

[0024] The head of bolt 23 faces downwards and is located below the mold body 21, while the shank of bolt 23 faces upwards and extends above the positioning groove 22. The mold body 21 has a first through hole 211 through which bolt 23 passes. A disc spring 25 and a nut 26 are sequentially mounted on the shank of bolt 23, with disc spring 25 located below nut 26. The insulating connector 900 has a contoured hole that mates with bolt 23. The insulating connector 900 is placed into the positioning groove 22 through which several bolts 23 pass. First, disc spring 25 is fitted onto the shank of bolt 23, and then nut 26 is tightened onto the shank of bolt 23. Disc spring 25 elastically abuts against the upper surface of insulating connector 900, thereby positioning insulating connector 900 into the positioning groove 22. The disc spring 25 increases the vertical force, thereby increasing friction and preventing nut 26 from loosening.

[0025] To better achieve the positioning between the bolt 23 and the insulating joint 900, a bushing 27 is fitted on the outer periphery of the bolt 23 at the position where it contacts the arc-shaped contoured surface of the positioning groove 22. The bushing 27 is made of Teflon. The bushing 27 serves two purposes: firstly, the bushing 27 cooperates with the contoured hole to achieve the positioning of the insulating joint 900; secondly, it prevents the insulating adhesive formed by the melting of the insulating layer from overflowing into the positioning groove 22, which would make it difficult to demold the insulating joint 900, and also prevents the overflowing insulating adhesive from contaminating the mold body 21.

[0026] To prevent the position of the insulating joint 900 from shifting due to the rotation of the bolt 23, several pairs of limiting blocks 28 are provided at the bottom of the mold body 21. Each pair of limiting blocks 28 is located on both sides of the head of the bolt 23. The limiting blocks 28 can restrict the bolt 23 from rotating around the vertical axis.

[0027] Mounting blocks 29 for mounting limit rods 24 are provided on the front and rear sides of the bottom of the mold body 21. The mounting blocks 29 extend vertically and are provided with mounting holes 291 for the limit rods 24 to pass through horizontally. One end of the limit rod 24 is provided with a handle 241 extending out of the side of the mold body 21. If the bolt 23 is damaged, the handle 241 of the limit rod 24 below the corresponding bolt 23 can be held and the limit rod 24 can be pulled out horizontally, and the bolt 23 will fall off. In some cases, the bushing 27 and the bolt 23 are interference fit, but the bushing 27 is made of Teflon. The bolt 23 can be gently tapped downward with a tool and it will fall off. Therefore, the bolt 23 can move up and down within the first through hole 211. After the damaged bolt 23 falls off, a new bolt 23 is placed on top. Then, holding the handle 241, the limit rod 24 is inserted horizontally into the mounting holes 291 in the two mounting blocks 29. When the limit rod 24 is inserted into place, it contacts the lower end of the bolt 23, thus limiting the bolt 23 and preventing it from falling off.

[0028] To facilitate the demolding of the insulating joint, the mold body 21 is equipped with several ejector rods 212 that move vertically within each positioning groove 22. Each positioning groove 22 has a countersunk hole 213 for mounting the ejector rods 212. Initially, the ejector rods 212 are located within the countersunk hole 213, with their upper ends flush with the bottom of the positioning groove 22. A lifting drive component 210 is located at the lower end of the mold body 21. When demolding is required, the lifting drive component 210 drives the ejector rods 212 upwards, thereby disengaging the insulating joint from the positioning groove 22 and achieving the demolding action. In this embodiment, the lifting drive component 210 includes a lifting cylinder 2101 and a lifting plate 2102 driven by the lifting cylinder 2101 to move vertically. Specifically, the bottom end of the ejector rod 212 is located below the limiting rod 24 to ensure that the lifting plate 2102 is not blocked by the limiting rod 24 during the lifting of the ejector rod 212. In other embodiments, the lifting drive 210 may be configured with other structures, which are not limited here.

[0029] In this embodiment, three positioning slots 22 are arranged side by side, enabling the processing of three insulating joints 900 at a time, thus improving production efficiency. Six bolts 23 are evenly spaced within each positioning slot 22 to ensure the stability of the insulating joint 900's positioning and prevent positional displacement of the insulating joint 900 during mold movement. With six bolts 23 in each of the three positioning slots 22, the bolts 23 form a three-row arrangement along the X-direction and a six-column arrangement along the Y-direction. Therefore, six limiting rods 24 extend along the Y-direction, each limiting rod 24 simultaneously limiting the position of three bolts 23 in the Y-direction.

[0030] In other embodiments, the number of positioning slots 22, the number of bolts 23 in each positioning slot 22, the spacing between bolts 23, the arrangement of bolts 23, and the number and position of limiting rods 24 can all be set according to the actual situation, and are not limited here.

[0031] When using the special mold 2 for forming insulating joints provided in this solution, the special mold is first positioned at the loading and unloading station. The insulating joint 900 is placed into the positioning groove 22 through several bolts 23. First, a disc spring 25 is sleeved on the thread of the bolt 23. Then, a nut 26 is tightened on the thread of the bolt 23. The disc spring 25 elastically abuts against the upper surface of the insulating joint 900, thereby positioning the insulating joint 900 into the positioning groove 22. The special mold is rotated to the subsequent station for operation. After the operation is completed, it is rotated back to the loading and unloading station. Several nuts 26 and disc springs 25 are removed, and the processed insulating joint 900 can be removed. Then, a new insulating joint 900 is placed on top for the next round of operation.

[0032] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A special mold for forming insulating joints, characterized in that: It includes a mold body, on which a plurality of positioning grooves are provided to accommodate insulating joints. Each positioning groove is provided with a plurality of bolts for positioning insulating joints. A limiting rod is movably provided at the bottom of the mold body below the bolts. When the limiting rod is horizontally inserted into the bottom of the mold body, it can limit the bolts. When the limiting rod is horizontally pulled out, the bolts can fall off the mold body.

2. The special mold for forming an insulating joint as described in claim 1, characterized in that: The wall of the positioning groove is an arc-shaped contoured surface, and the arc-shaped contoured surface is partially contoured to the outer periphery of the insulating joint.

3. The special mold for forming insulating joints as described in claim 2, characterized in that: A bushing is fitted around the outer periphery of the bolt at the position where it contacts the arc-shaped contoured surface of the positioning groove.

4. The special mold for forming insulating joints as described in claim 1, characterized in that: The head of the bolt faces downward and is located below the mold body, the bolt shank faces upward and extends upward towards the positioning groove, and the mold body is provided with a plurality of first through holes for the bolt to pass through.

5. The special mold for forming insulating joints as described in claim 4, characterized in that: The bolt has a disc spring and a nut on its threaded shaft, with the disc spring located below the nut.

6. The special mold for forming an insulating joint as described in claim 4, characterized in that: The bottom of the mold body is provided with several pairs of limiting blocks, and each pair of limiting blocks is located on both sides of the head of the bolt.

7. The special mold for forming insulating joints as described in claim 1, characterized in that: The bottom front and rear sides of the mold body are provided with mounting blocks for mounting the limiting rod, and the mounting blocks are provided with mounting holes for the limiting rod to pass through horizontally.

8. The special mold for forming an insulating joint as described in claim 7, characterized in that: One end of the limiting rod is provided with a handle that extends out of the side of the mold body.

9. The special mold for forming insulating joints as described in claim 1, characterized in that: Each of the mold bodies has a push rod that moves up and down in each of the positioning slots. The positioning slots are provided with countersunk holes for installing the push rods. The lower end of the mold body is provided with a lifting drive component that lifts the push rods upward.

10. A special mold for forming insulating joints as described in claim 1, characterized in that: The positioning slots are arranged side by side, and each positioning slot contains six bolts. The limiting rods extend along the Y direction and are arranged in six places. Each limiting rod simultaneously limits the three bolts in the Y direction.

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