Epoxy resin pouring mold

Abstract

The utility model relates to the technical field of production and manufacturing of epoxy pouring insulating parts, in particular to an epoxy resin pouring mold. The epoxy resin pouring mold comprises a mold body, the mold body is provided with a forming cavity used for forming a workpiece, the forming cavity is communicated with a pouring gate, and a groove is formed in the position, close to the root, of the pouring gate to form a weak structure. After curing is finished, a circle of groove is formed in the position, close to the root, of the protruding part on the insulator, namely the position, close to the surface of the insulator, of the protruding part, a weak structure is formed in the groove, the protruding part can be broken at the groove only by using a small hammer to conduct slight knocking, and therefore redundant protruding parts are removed, only a small number of protruding parts are left on the insulator at the moment, and the cost is reduced. And polishing with abrasive paper to remove. According to the epoxy resin pouring mold, the removal mode of redundant protruding parts on the insulator is changed, mechanical damage possibly caused to the insulator in the protruding part removal process can be reduced, and the protruding part removal efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production and manufacturing of epoxy casting insulation parts, in particular to an epoxy resin casting mold. Background Art

[0002] When manufacturing epoxy cast insulators for high-voltage switchgear, in order to achieve casting and ensure the size and appearance of the insulator, a longer gate is often designed when designing the casting mold based on the shrinkage of the epoxy resin during the curing process. For example, a pot-type insulator casting mold disclosed in the Chinese invention patent with the authorization announcement number CN109940806B includes a male mold and a female mold, both of which have a cavity for molding a workpiece, and the male mold and the female mold are fixedly assembled to form a mold cavity for molding a pot-type insulator. The mold has a gate connected to the mold cavity, and the gate extends radially outward for a long distance along the mold. The epoxy resin casting material enters the mold cavity through the gate, is heated and cured, and the molded pot-type insulator is taken out after the curing is completed. At this time, the pot-type insulator has an excess protrusion protruding radially outward in accordance with the shape of the mold gate, and the protrusion needs to be removed. Another example is the column insulator casting mold disclosed in the Chinese invention patent with authorization announcement number CN110653977B, which includes a mold body, the mold body having a cavity for molding a workpiece, the axial direction of the cavity is consistent with the axial extension direction of the column insulator, and the mold body is provided with a gate connected to the cavity, the gate extends outward for a long distance perpendicular to the axial direction of the cavity, and epoxy resin enters the cavity through the gate. After curing, the molded column insulator is taken out. At this time, the column insulator has an excess protrusion that is consistent with the shape of the mold gate and protrudes outward perpendicular to the axial direction of the insulator, and the protrusion needs to be removed.

[0003] When removing the raised portion, the current process is to first use a toothless saw to saw the raised portion of the insulator, and then use sandpaper to grind the sawing position. This process may not only cause mechanical damage to the insulator, but also generate a large amount of dust and noise, making the operating environment of the operator poor, and the efficiency of removing the raised portion is low. Utility Model Content

[0004] The utility model aims to provide an epoxy resin casting mold to solve the problems of low efficiency in removing the protrusions and poor working environment when removing the redundant protrusions on the workpiece after the workpiece is formed in the existing insulator casting mold.

[0005] To achieve the above purpose, the utility model epoxy resin casting mold adopts the following technical solutions:

[0006] An epoxy resin casting mold comprises a mold body, wherein the mold body has a molding cavity for molding a workpiece, the molding cavity is connected with a gate, and a groove is provided near the root of the gate to form a weak structure.

[0007] Furthermore, the groove is provided with a circle along the gate near the root.

[0008] Furthermore, the groove is an annular groove.

[0009] Furthermore, the bottom of the groove has a pointed structure protruding inwards.

[0010] Furthermore, the cross section of the pointed structure is V-shaped.

[0011] Furthermore, the sharp corners of the sharp corner structure are rounded.

[0012] Beneficial effects: The utility model epoxy resin casting mold is improved on the basis of the existing casting mold. A weak structure is formed by setting a groove near the root position of the gate. After the curing is completed, the molded insulator is taken out. At this time, the insulator has an excess protrusion protruding outward that is consistent with the shape of the mold gate. A circle of grooves is formed near the root position of the protrusion, that is, the position of the protrusion close to the surface of the insulator. A weak structure is formed at the groove. The protrusion only needs to be tapped lightly with a small hammer to break the protrusion at the groove, thereby removing the excess protrusion. At this time, only a small amount of protrusion remains on the insulator, which can be removed by grinding with sandpaper. The utility model epoxy resin casting mold changes the method of removing excess protrusions on the insulator, can reduce the mechanical damage that may be caused to the insulator during the removal of the protrusions, and improves the efficiency of removing the protrusions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the epoxy resin casting mold of the utility model near the gate;

[0014] In the figure: 1. mold body; 2. gate; 201. groove; 202. sharp corner structure; 3. molding cavity. DETAILED DESCRIPTION

[0015] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0016] The utility model is an epoxy resin casting mold which is improved on the basis of the existing insulator casting mold, and is mainly used to solve the problem that the existing insulator casting mold needs to be sawed with a toothless saw and then polished with sandpaper when removing the redundant protrusions on the insulator after the insulator is formed, resulting in a poor working environment and low efficiency in removing the protrusions.

[0017] The principle of the epoxy resin casting mold of the utility model is: a groove is set near the root of the gate of the mold to form a weak structure. After curing, a circle of grooves can be formed near the root of the redundant protrusion on the insulator, that is, near the surface of the insulator. A weak structure is formed at the groove, and the protrusion can be broken at the groove by tapping with a small hammer, thereby removing the redundant protrusion. No toothless saw is used for cutting, thereby reducing the mechanical damage that may be caused to the insulator during the removal of the protrusion, and no large amount of dust or noise is generated, keeping the working environment comfortable, and improving the efficiency of protrusion removal.

[0018] Embodiment of the utility model epoxy resin casting mold:

[0019] like Figure 1 As shown, the epoxy resin casting mold includes a mold body 1, and the mold body 1 has a molding cavity 3 for molding a workpiece. The molding cavity 3 is connected to a gate 2, and a groove 201 is provided near the root of the gate 2 to form a weak structure. The groove 201 is provided along the root of the gate 2, so that as many weak structure parts as possible can be formed near the root of the gate 2. When removing the excess protrusions after curing, it is more conducive to the protrusions to break at multiple weak structures, so that the protrusions can be removed more thoroughly and the operation is more labor-saving. In a preferred embodiment, the groove 201 is an annular groove, so that a whole circle of weak structures can be formed near the root of the gate 2. When using a small hammer to knock the protrusion, there is no need to find a knocking position specifically. The same effect can be achieved by knocking at any position in the circumference, so that the protrusions can be removed more thoroughly, and the operation is more convenient and labor-saving. Of course, in other embodiments, the groove 201 may also be an arc groove, and there may be multiple arc grooves, which are arranged at intervals on the same circumference, and the multiple arc grooves are arranged in a circle along the root position of the gate 2, in which case a weak structure is formed at each arc groove. Of course, the groove 201 may also be provided with a half circle along the root position of the gate 2, in which case the groove 201 may be a semi-annular groove.

[0020] In order to further reduce the structural strength of the groove 201 and make the protrusion more likely to break at the groove 201 when subjected to force, a sharp angle structure 202 protruding inward is provided at the bottom of the groove 201, such as Figure 1 As shown in . When the protrusion is subjected to force, it breaks at the sharp angle structure 202. The sharp angle structure 202 is close to the bottom of the groove 201, which can make the protrusion break closer to the root of the protrusion, which is more effective in removing the protrusion and helps reduce the subsequent grinding workload. The cross-section of the sharp angle structure 202 is V-shaped. Such a cross-sectional shape is more conducive to the protrusion breaking at the sharp angle structure 202 when the protrusion is subjected to force, and the protrusion removal effect is better. Figure 1It can be seen from the figure that the sharp corners of the sharp corner structure 202 are rounded. The advantage of such a design is that it is conducive to the flow of the epoxy resin casting material in the gate 2 and the subsequent curing and molding.

[0021] Of course, in another embodiment, the sharp angle of the sharp angle structure 202 may also be a right angle. The cross section of the sharp angle structure 202 may also be other structures, for example, one side of the cross section is a hypotenuse inclined toward the root of the gate 2, and the other side is a right angle side extending along the axial direction of the gate 2. Of course, the sharp angle structure 202 may not be provided at the groove 201, so that the inner diameters of various parts of the groove 201 are equal.

[0022] The epoxy resin casting mold of the utility model forms a weak structure by setting a groove 201 near the root position of the gate 2. After the curing is completed, the molded insulator is taken out. At this time, the insulator has an extra protrusion protruding outward in the same shape as the mold gate 2. A circle of grooves is formed near the root position of the protrusion, that is, the position of the protrusion close to the surface of the insulator. A weak structure is formed at the groove. It only needs to be tapped with a small hammer to break the protrusion at the groove, so as to remove the extra protrusion. At this time, only a small amount of protrusion remains on the insulator, which can be removed by grinding with sandpaper. The epoxy resin casting mold of the utility model changes the method of removing the extra protrusion on the insulator, which can reduce the mechanical damage that may be caused to the insulator during the removal of the protrusion, and improve the removal efficiency of the protrusion. The new gate structure of the epoxy resin casting mold of the utility model can be applied to the design of epoxy insulator casting molds of various structures.

[0023] When using the epoxy resin casting mold of the utility model to form an insulator, the following operating steps can be referred to:

[0024] 1) Clean the molding cavity of the mold to remove foreign matter, resin, etc.;

[0025] 2) Spray the release agent on the surface of the molding cavity and the gate area;

[0026] 3) Install the insulator insert according to the insulator structure, assemble the mold in place, preheat it, push the pouring pot into the pouring pot for pouring, put it into the curing furnace for curing after pouring, and demould it after curing. At this time, a groove is formed near the root of the excess protrusion on the insulator;

[0027] 4) Remove the raised part of the demolded insulator, tap the raised part lightly with a hammer, and the raised part will break from the groove, then grind the raised part remaining on the insulator.

[0028] When removing the protrusion, a toothless saw is no longer used for cutting, thereby reducing the mechanical damage that may be caused to the insulator during the protrusion removal process, and no large amount of dust or noise will be generated, which can maintain a comfortable working environment and improve the efficiency of protrusion removal.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. An epoxy resin casting mold, comprising a mold body, the mold body having a molding cavity for molding a workpiece, the molding cavity being connected to a gate, characterized in that: A groove is provided near the root of the gate to form a weak structure. The groove is provided along the root of the gate in a circle and is an annular groove. The bottom of the groove has a pointed structure protruding inwards.

2. The epoxy resin casting mold according to claim 1, characterized in that: The cross section of the pointed structure is V-shaped.

3. The epoxy resin casting mold according to claim 1, characterized in that: The sharp corners of the sharp corner structure are rounded.

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