Pouring mold for column insulator

Abstract

The utility model relates to the field of casting molding equipment, in particular to a column type insulator casting mold. The column type insulator pouring mold comprises a mold cylinder internally provided with a cavity, the mold cylinder is provided with a pouring gate communicated with the cavity, the two ends of the mold cylinder are provided with a long supporting foot and a short supporting foot respectively, the long supporting foot and the short supporting foot are located on the same side of the mold cylinder, and an upper end cover is assembled at the position of an opening, close to one side of the long supporting foot, of the mold cylinder. A lower end cover is assembled at the opening close to one side of the short supporting leg, an exhaust groove communicated with the pouring gate is formed in the inner wall of the highest position of the cavity, and the exhaust groove is used for exhausting air in the cavity during pouring and feeding. According to the column type insulator pouring mold, yellowing and precipitation of products can be effectively reduced, gas in the mold can be exhausted in time through the exhaust grooves in the mold, bubbles of the products are avoided, and the performance of the products is improved.

Description

Technical Field

[0001] The utility model relates to the field of casting and molding equipment, in particular to a casting mold for a column insulator. Background Art

[0002] Post insulators are core components of GIS high-voltage switches, providing support and insulation. Therefore, they must possess excellent mechanical and insulating properties. To meet these requirements, the post insulator's manufacturing process requires that after demolding, the post insulator must exhibit no shrinkage marks, internal cracks, or adhesive gaps.

[0003] Currently, there are two commonly used casting molds for post insulators: vertical and horizontal. Post insulators cast using vertical casting molds have the advantage of a smooth appearance without shrinkage marks, but are prone to internal bonding gaps between the casting material and the metal insert during product flaw detection. Post insulators cast using horizontal casting molds rarely have bonding gap issues during product flaw detection, but are prone to yellowing, precipitation, and bubbles. Increasing the mold placement angle can reduce yellowing and precipitation problems, but it can also easily lead to bubbles in the product.

[0004] The Chinese invention patent with authorization announcement number CN110653977B disclosed a column insulator casting mold on October 12, 2021. The column insulator casting mold includes a mold body, a gate and an exhaust groove. Two legs, one high and one low, are also installed on the mold to realize the tilted placement of the mold, which can reduce the yellowing and precipitation of the product. At the same time, during pouring, the gas accumulated at the connection part between the gate and the cavity can be discharged from the gate in time through the exhaust groove. A gas collecting cavity is provided at the joint of the upper end cover and the port of the mold to accommodate the gas at the high point in the mold to avoid bubbles in the product. However, the exhaust groove of the column insulator casting mold is located on the side of the gate close to the short leg, and the gas contained in the gas collecting cavity is limited. During the pouring process, there is still a problem that some gas at the high point in the mold cannot be discharged in time, resulting in bubbles in the product. Utility Model Content

[0005] The utility model aims to provide a column insulator casting mold to solve the problem that part of the gas at the high point of the mold cannot be discharged in time during the casting process of the existing column insulator casting mold, resulting in bubbles in the product.

[0006] The post insulator casting mold of the utility model adopts the following technical solutions:

[0007] The post insulator casting mold includes a mold barrel with a mold cavity therein, a gate connected to the mold cavity on the mold barrel, and long legs and short legs are respectively provided at both ends of the mold barrel. The long legs and short legs are located on the same side of the mold barrel. The mold barrel is equipped with an upper end cover at the opening close to the long legs, and a lower end cover is equipped with the opening close to the short legs. An exhaust groove connected to the gate is opened on the inner wall at the highest position of the mold cavity, and the exhaust groove is used to discharge air in the mold cavity during pouring and feeding.

[0008] Furthermore, a smooth transition structure communicating with the gate is provided on a side of the mold barrel opposite to the exhaust groove.

[0009] Furthermore, the long support leg and the short support leg cooperate to form an angle of 20° between the axis direction of the cavity and the horizontal direction.

[0010] Furthermore, the venting groove is inclined relative to the radial direction of the gate, and the venting groove and the inner wall of the gate are smoothly transitioned.

[0011] Furthermore, both the upper end cover and the lower end cover are installed with insert screws.

[0012] Furthermore, the upper end cover and the lower end cover are fastened to the mold barrel by mold bolts.

[0013] Furthermore, water tanks are provided on both sides of the gate to prevent the pouring material at the gate from solidifying too early and being unable to re-mold the pouring material in the cavity.

[0014] Furthermore, lifting rings are fixedly installed on the upper end cover and the lower end cover to facilitate lifting and placing the upper end cover and the lower end cover.

[0015] Furthermore, the lifting ring is connected to the upper end cover and the lower end cover through threads.

[0016] Furthermore, the long legs and the short legs are connected to the mold cylinder by screws.

[0017] Beneficial effects: The column insulator casting mold of the utility model is an improved invention. The long legs and short legs installed on the column insulator casting mold of the utility model can place the mold in an inclined state, which can reduce the problems of yellowing and precipitation of the product. An exhaust groove connected to the gate is provided at the highest position in the mold. The exhaust groove can timely discharge the gas in the cavity and the gas at the high point of the cavity, avoiding the formation of bubbles in the product. The column insulator casting mold of the utility model can effectively reduce the occurrence of yellowing and precipitation of the product. The exhaust groove on the mold can timely discharge the gas in the mold, avoiding the formation of bubbles in the product, and improving the performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an embodiment of a post insulator casting mold of the present utility model;

[0019] Figure 2 The utility model is a column insulator casting mold Figure 1 A schematic structural diagram of the exhaust slot according to an embodiment.

[0020] In the figure: 1. Gate; 2. Transition structure; 3. Vent groove; 4. Short support leg; 5. Long support leg; 6. Mold barrel; 7. Upper end cover; 8. Lower end cover; 9. Lifting ring; 10. Insert; 11. Water tank. DETAILED DESCRIPTION

[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0022] The utility model aims to solve the problem that part of the gas at the highest position in the existing column insulator casting mold cannot be discharged in time during casting, resulting in bubbles in the product. The utility model proposes a column insulator casting mold in a targeted manner. By opening an exhaust groove connected to the gate at the highest position in the mold, the gas at the highest position in the mold can be discharged more smoothly and timely, thereby avoiding bubbles in the product.

[0023] In a basic embodiment, Figure 1 As shown, short legs 4 and long legs 5 are installed at both ends below the mold barrel 6, an upper end cover 7 is installed at the opening of the mold barrel 6 on one side of the long leg 5, and a lower end cover 8 is installed at the opening of the mold barrel 6 on the side of the short leg 4. The mold barrel 6 and the upper end cover 7 cooperate to form a gate 1, and an exhaust groove 3 is opened on the upper end cover 1. The structure of the exhaust groove 3 is as shown in FIG. Figure 2 As shown. During pouring, the pouring material enters the cavity of the mold barrel 6 through the gate 1, and the pouring material gradually fills the cavity from bottom to top. The gas in the cavity is discharged from bottom to top. The exhaust groove 3 on the upper end cover 7 can make the gas accumulated at the gate position be discharged in time. At the same time, the exhaust groove 3 is located at the highest point of the cavity, which can make the gas at the high point of the cavity be discharged in time and smoothly, reducing the possibility of bubbles after the product is cast and formed. After the pouring is completed, the pouring material is solidified at a certain temperature and time.

[0024] In a preferred embodiment, a transition structure 2 is provided in the portion of the mold barrel 6 communicating with the gate 1 and connected to the gate in an oblique and smooth manner. The transition structure 2 can enable the gas in the mold barrel cavity to be discharged smoothly.

[0025] In a preferred embodiment, when the mold is placed horizontally, the axis direction of the mold cavity forms an angle of 20° with the horizontal direction. Increasing the mold angle can effectively reduce yellowing and precipitation of the product.

[0026] In other embodiments, the mold angle may be 25°. Increasing the mold angle to 25° may also reduce yellowing and precipitation of the product.

[0027] In a preferred embodiment, the transition structure 2 and the vent groove 3 are radially inclined relative to the gate 1, and the connection between the transition structure 2 and the vent groove 3 and the gate 1 has a smooth transition, which can make the pouring material enter the mold barrel 6 more smoothly, and also make the gas more smoothly discharged, further reducing the possibility of bubbles appearing after the product is cast and molded.

[0028] In a preferred embodiment, inserts 10 are installed on both the upper end cover 7 and the lower end cover 8, and the upper end cover 7 and the lower end cover 8 are locked and sealed by insert bolts and sealing grooves.

[0029] In other embodiments, the upper end cover 7 and the lower end cover 8 may be an integrated structure, which has better sealing performance.

[0030] In a preferred embodiment, the upper end cover 7 and the lower end cover 8 are fastened to the mold barrel 6 by mold bolts, so as to facilitate the disassembly and assembly of the entire casting mold.

[0031] In other embodiments, the upper end cover 7 and the lower end cover 8 can be fastened to the mold cylinder 6 by using pins.

[0032] In a preferred embodiment, water tanks 11 are installed on both sides of the gate 1 and are filled with water. Since the castable material will gradually harden during the curing process, arranging water tanks 11 on both sides of the gate 1 can prevent the castable material at the gate from curing too early during the pouring process, thereby making it impossible to re-plasticize the castable material in the cavity, thereby affecting the structure and performance of the product and making the product unable to meet the use requirements.

[0033] In a preferred embodiment, lifting rings 9 are installed on the upper end cover 7 and the lower end cover 8 to facilitate the lifting and lowering of the upper end cover 7 and the lower end cover 8, and to facilitate the assembly and disassembly of the mold.

[0034] In other embodiments, the lifting ring 9 may not be installed on the upper end cover 7 and the lower end cover 8, thereby reducing the volume of the mold, and the upper end cover 7 and the lower end cover 8 can be directly moved to complete the assembly and disassembly of the mold.

[0035] In a preferred embodiment, the lifting ring 9 is connected to the upper end cover 7 and the lower end cover 8 by threads, so as to facilitate the removal and installation of the lifting ring 9 .

[0036] In other embodiments, the lifting ring 9 is an integrated structure with the upper end cover 7 and the lower end cover 8. The lifting ring 9 can be directly welded to the upper end cover 7 and the lower end cover 8 to make the structure of the upper end cover 7 and the lower end cover 8 more solid.

[0037] In a preferred embodiment, the long legs 5 and the short legs 4 are connected to the mold barrel 6 by screws, which facilitates the disassembly of the legs and reduces the volume of the mold.

[0038] In other embodiments, the long legs 5 and the short legs 4 can be welded to the mold barrel 6 to stabilize the overall structure of the mold.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A casting mold for a column insulator, comprising a mold barrel with a mold cavity therein, a gate communicating with the mold cavity on the mold barrel, a long leg and a short leg respectively provided at both ends of the mold barrel, the long leg and the short leg being located on the same side of the mold barrel, an upper end cap being provided at the opening of the mold barrel near the long leg, and a lower end cap being provided at the opening of the mold barrel near the short leg, wherein: An exhaust groove connected to the gate is opened on the inner wall at the highest position of the cavity, and the exhaust groove is used to exhaust the air in the cavity when pouring and feeding.

2. The post insulator casting mold according to claim 1, characterized in that: A smooth transition structure communicating with the gate is provided on one side of the mold barrel opposite to the exhaust groove.

3. The post insulator casting mold according to claim 1, characterized in that: The long support legs cooperate with the short support legs to form an angle of 20° between the axis direction of the cavity and the horizontal direction.

4. The post insulator casting mold according to claim 1, characterized in that: The venting groove is inclined relative to the radial direction of the gate, and the venting groove smoothly transitions to the inner wall of the gate.

5. The post insulator casting mold according to claim 4, characterized in that: The upper end cover and the lower end cover are both provided with embedded screws.

6. The post insulator casting mold according to claim 5, characterized in that: The upper end cover and the lower end cover are fastened to the mold barrel by mold clamping bolts.

7. The post insulator casting mold according to claim 1, characterized in that: Water tanks are provided on both sides of the gate to prevent the pouring material at the gate from solidifying too early and being unable to re-mold the pouring material in the cavity.

8. The post insulator casting mold according to any one of claims 1 to 7, characterized in that: The upper end cover and the lower end cover are fixedly mounted with lifting rings to facilitate lifting and placing of the upper end cover and the lower end cover.

9. The post insulator casting mold according to claim 8, characterized in that: The lifting ring is connected to the upper end cover and the lower end cover through threads.

10. The post insulator casting mold according to claim 1, characterized in that: The long supporting legs and the short supporting legs are connected to the mold cylinder through screws.

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