Heat preservation cup type heating and heat preservation riser sleeve for casting

Abstract

The utility model belongs to the technical field of casting production, and relates to a heat-insulating cup type heating and heat-insulating riser bush for casting, which comprises a heating riser bush and a heat-insulating riser bush, the heating riser bush is coaxially arranged in an inner cavity of the heat-insulating riser bush, and an air layer is formed between the heating riser bush and the heat-insulating riser bush; an exhaust hole is formed in the top of the heat preservation riser sleeve, and the lower flange face of the exothermic riser sleeve abuts against the bottom face of the lower groove of the heat preservation riser sleeve and is bonded with the bottom face of the lower groove of the heat preservation riser sleeve through fire-resistant glue; an integrally-connected supporting limiting part is constructed on the top wall of the heat preservation riser sleeve, and the top face of the exothermic riser sleeve abuts against the bottom face of the supporting limiting part. The heating and heat preservation riser bush has a better heat preservation effect, fewer heating materials are used, and the cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting production and relates to a heating and heat-insulating riser sleeve for thermos cup type casting. Background Art

[0002] When producing castings, we often use heating riser sleeves for shrinkage compensation. Heating riser sleeves can keep the temperature of molten metal warm for a long time and make the temperature of molten metal drop more slowly. For risers of the same size, the risers with heating riser sleeves can compensate for thicker and larger castings compared with the risers made directly on the sand mold; on the contrary, for the same casting position, the risers with heating riser sleeves can be smaller in size and lighter in weight, which improves the process yield of castings and is conducive to reducing production costs and energy conservation and emission reduction. At present, heating riser sleeves are made of all heating materials, so the cost is the highest; double-layer heating and insulation riser sleeve products with outer heating layer and inner insulation have slightly lower costs. Summary of the invention

[0003] In view of the above problems, the utility model provides a heating and heat-insulating riser sleeve for thermos cup type casting, which has better heat-insulating effect, less heating material and lower cost.

[0004] According to the technical solution of the utility model: a heating and insulating riser sleeve for thermos cup casting, characterized in that: it comprises a heating riser sleeve and an insulating riser sleeve, the heating riser sleeve is coaxially arranged in the inner cavity of the insulating riser sleeve, and an air layer is formed between the heating riser sleeve and the insulating riser sleeve;

[0005] An exhaust hole is arranged on the top of the thermal insulation riser sleeve.

[0006] As a further improvement of the utility model, the lower flange surface of the heat-generating riser sleeve abuts against the bottom surface of the lower groove of the heat-insulating riser sleeve and is bonded by refractory glue;

[0007] The top wall of the heat-insulating riser sleeve is constructed with an integrally connected support and limiting portion, and the top surface of the heat-insulating riser sleeve abuts against the bottom surface of the support and limiting portion.

[0008] As a further improvement of the utility model, the support and limiting portion is constructed in a conical shape with a large upper portion and a small lower portion, and the bottom surface of the support and limiting portion is fixed to the top of the heating riser sleeve by means of refractory adhesive.

[0009] As a further improvement of the utility model, the exhaust hole is constructed as a tapered hole with a small upper portion and a large lower portion.

[0010] As a further improvement of the utility model, the outer circumferential surface of the lower flange surface is constructed as a conical surface, and the conical surface of the lower flange surface is sealingly matched with the inner wall corresponding to the lower groove of the thermal insulation riser sleeve.

[0011] As a further improvement of the present invention, the thickness of the lower flange surface is consistent with the thickness of the lower groove.

[0012] As a further improvement of the utility model, the heat-generating riser sleeve is made of a heat-generating material, and the heat-insulating riser sleeve is made of a heat-insulating material.

[0013] As a further improvement of the utility model, the top wall and bottom surface of the heat-generating riser sleeve are constructed as an integrally connected frustum.

[0014] As a further improvement of the utility model, an easy-to-cut sheet is pasted on the bottom surface of the heating riser sleeve.

[0015] The technical effect of the utility model is that the utility model combines a heating riser sleeve and a thermal insulation riser sleeve to form an integral structure. The characteristic of the structure is that the riser sleeve is composed of a three-layer structure. Since the middle air layer is filled with hot air, the thermal conductivity of the air is very low, and the heat of the heating riser sleeve is transmitted to the thermal insulation layer more slowly. Therefore, the overall thermal insulation effect of the thermos cup type heating and thermal insulation riser sleeve is better. Compared with ordinary heating riser sleeves and double-layer heating and thermal insulation riser sleeves, the thermos cup type heating and thermal insulation riser sleeve can make both the heating layer and the thermal insulation layer thinner while having the same thermal insulation effect. Without affecting the use strength, the product wall thickness can be made the thinnest, so less heating material is required and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the first embodiment of the utility model.

[0017] Figure 2 It is a schematic structural diagram of a second embodiment of the utility model. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. The described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0020] Figure 1 , 2The heat-generating riser sleeve 10, the lower flange surface 11, the heat-insulating riser sleeve 20, the lower groove 21, the support limiter 22, the exhaust hole 23, the air layer 30, the easy-cutting piece 40 and the like are included.

[0021] like Figure 1 , 2 As shown, the utility model is a heating and insulating riser sleeve for thermos cup type casting, comprising a heating riser sleeve 10 and an insulating riser sleeve 20. The heating riser sleeve 10 is coaxially arranged in the inner cavity of the insulating riser sleeve 20. The heating riser sleeve 10 is made of heating material, and the insulating riser sleeve 20 is made of insulating material, that is, the inner layer is made of heating material, and the outer layer is made of insulating material. In production practice, the heating material can be composed of a mixture of aluminum powder, iron oxide, manganese dioxide, and fluoride combustion aids, as well as known heating materials that can undergo aluminothermic reaction; the insulating material can be lightweight refractory insulating materials such as floating beads and paper pulp.

[0022] An air layer 30 is formed between the heat-generating riser sleeve 10 and the heat-insulating riser sleeve 20 .

[0023] An exhaust hole 23 is provided on the top of the heat-insulating riser sleeve 20 .

[0024] It can be understood that the heating riser sleeve 10 and the insulation riser sleeve 20 are bonded together by refractory adhesive, and the inner and outer riser sleeves are in contact only at the lower opening and the top surface. Specifically, the lower flange surface 11 of the heating riser sleeve 10 abuts against the bottom surface of the lower groove 21 of the insulation riser sleeve 20 and is bonded by refractory adhesive. During assembly, a circle of refractory adhesive is applied to the lower groove 21.

[0025] The support and limit portion 22 is constructed in a conical shape with a large upper portion and a small lower portion. The bottom surface of the support and limit portion 22 is fixed to the top of the heating riser sleeve 10 by means of refractory adhesive.

[0026] The top wall of the heat-insulating riser sleeve 20 is constructed with an integrally connected support and limit portion 22 , and the top surface of the heat-insulating riser sleeve 10 abuts against the bottom surface of the support and limit portion 22 .

[0027] The exhaust hole 23 is constructed as a tapered hole with a small upper portion and a large lower portion, which increases the aperture of the exhaust hole's outlet end and enhances the exhaust effect. At the same time, the exhaust hole 23 has a small aperture at the outlet end to achieve concentrated exhaust.

[0028] The outer circumferential surface of the lower flange surface 11 is configured as a conical surface, and the conical surface of the lower flange surface 11 is sealingly matched with the inner wall corresponding to the lower groove 21 of the thermal insulation riser sleeve 20 .

[0029] The thickness of the lower flange surface 11 is consistent with the thickness of the lower groove 21 , thereby ensuring that the opening end of the heat-generating riser sleeve 10 and the opening end of the heat-insulating riser sleeve 20 are in the same horizontal plane.

[0030] The top wall and bottom surface of the heat-generating riser sleeve 10 are constructed as an integrally connected frustum.

[0031] like Figure 2 As shown, in another embodiment of the present application, an easy-to-cut sheet 40 is pasted on the bottom surface of the heating riser sleeve 10 , and the inner hole of the easy-to-cut sheet 40 is smaller than the inner hole of the heating riser sleeve 10 .

[0032] In specific practice, the utility model can be used for various sand molds and metal mold processes such as green sand, resin sand, cold core box, hot core box and water glass sand; it is suitable for shrinkage feeding of various metal castings such as cast iron, cast steel, cast copper and cast aluminum.

[0033] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A heat-insulating riser sleeve for thermos cup casting, characterized in that: It comprises a heat-generating riser sleeve (10) and a heat-insulating riser sleeve (20), wherein the heat-generating riser sleeve (10) is coaxially arranged in an inner cavity of the heat-insulating riser sleeve (20), and an air layer (30) is formed between the heat-generating riser sleeve (10) and the heat-insulating riser sleeve (20); An exhaust hole (23) is provided on the top of the thermal insulation riser sleeve (20).

2. The heat-insulating riser sleeve for thermos cup casting according to claim 1, characterized in that: The lower flange surface (11) of the heat-generating riser sleeve (10) abuts against the bottom surface of the lower groove (21) of the heat-insulating riser sleeve (20) and is bonded by means of refractory adhesive; The top wall structure of the heat-insulating riser sleeve (20) is integrally connected with a support and limiting portion (22), and the top surface of the heat-generating riser sleeve (10) abuts against the bottom surface of the support and limiting portion (22).

3. The heat-insulating riser sleeve for thermos cup type casting according to claim 2, characterized in that: The support and limit portion (22) is constructed in a conical shape with a larger upper portion and a smaller lower portion, and the bottom surface of the support and limit portion (22) is fixed to the top of the heating riser sleeve (10) by means of refractory adhesive.

4. The heat-insulating riser sleeve for thermos cup casting according to claim 1, characterized in that: The exhaust hole (23) is configured as a tapered hole with a small upper portion and a large lower portion.

5. The heat-insulating riser sleeve for thermos cup casting as claimed in claim 2, characterized in that: The outer circumferential surface of the lower flange surface (11) is configured as a conical surface, and the conical surface of the lower flange surface (11) is sealingly matched with the inner wall corresponding to the lower groove (21) of the thermal insulation riser sleeve (20).

6. The heat-insulating riser sleeve for thermos cup casting as claimed in claim 2, characterized in that: The thickness of the lower flange surface (11) is consistent with the thickness of the lower groove (21).

7. The heat-insulating riser sleeve for thermos cup casting according to claim 1, characterized in that: The top wall and bottom surface of the heat-generating riser sleeve (10) are constructed as an integrally connected frustum.

8. The heat-insulating riser sleeve for thermos cup casting as claimed in claim 1, characterized in that: An easy-to-cut sheet (40) is adhered to the bottom surface of the heat-generating riser sleeve (10).

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