Casting die for front seat of electric wheel rack

Abstract

The utility model discloses an electric wheel rack front seat casting die which comprises an outer die and a heat preservation sleeve, an inner die is arranged in the outer die, two groups of first test blocks are arranged on the surface of the outer die, the heat preservation sleeve is arranged in the inner die, and a plurality of heat preservation risers are annularly arranged on the surface of the heat preservation sleeve. A riser positioning plate used for supporting and positioning the insulated risers is arranged on the surfaces of the insulated risers, and the insulated risers are annularly arranged on the surface of the insulated sleeve, so that when molten metal is poured in the casting mold, the solidification time of the molten metal in the casting mold is prolonged, and heat loss in the casting mold is effectively reduced; molten metal in the casting die can be better solidified in a casting, the cooling speed of the molten metal in the casting die is reduced through the insulated feeder head, and therefore it is guaranteed that the molten metal is fully filled and solidified in the whole casting process, and the problem that the forming quality is affected due to the fact that the cooling speed is not uniform is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric wheel frames, and particularly relates to a front seat casting mould of an electric wheel frame. Background Art

[0002] The electric wheel frame front seat refers to the front seat part of the electric wheelchair frame, which is mainly used to support, fix and position the front wheels of the electric wheelchair. During the manufacturing process of the electric wheel frame front seat, a casting mold is required to manufacture an integrally formed electric wheel frame front seat.

[0003] Currently, when casting the front seat of the electric wheel frame, the outer wall thickness of the casting mold is relatively thick and the inner wall thickness is relatively thin, so that different parts may have different thicknesses. The uneven thickness distribution will cause a temperature gradient to be generated during the cooling process after the casting of the front seat of the electric wheel frame is completed. This will cause the cooling rate of the molten metal poured in the casting mold to be uneven. Since the inner wall of the casting mold is relatively thin, the cooling rate is faster than other parts. The uneven cooling rate may cause stress and deformation inside the casting, thereby causing defects such as cracks or deformation in the front seat of the electric wheel frame, thereby affecting the molding quality. Utility Model Content

[0004] The purpose of the utility model is to provide a casting mold for the front seat of an electric wheel frame to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a casting mold for a front seat of an electric wheel frame, comprising:

[0006] An outer mold, wherein an inner mold is provided inside the outer mold, and two groups of first test blocks are provided on the surface of the outer mold;

[0007] The insulation sleeve is arranged inside the inner mold, and a plurality of insulation risers are arranged in a ring on the surface of the insulation sleeve. The surface of the insulation risers is provided with a riser positioning plate for supporting and positioning the insulation risers, and the surface of the inner mold is provided with two groups of second test blocks.

[0008] Preferably, a sand accumulation groove is provided on the surface of the outer mold, and an inner gate is provided on one side of the sand accumulation groove, and the molten metal is filled into the casting mold through the inner gate.

[0009] Preferably, an air vent is provided on the surface of the outer mold and located on one side of the sand accumulation groove, and the air vent is used to discharge the gas in the casting mold.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] (1) By setting an insulation sleeve in the middle of the inner mold to keep the molten metal poured in the casting mold warm, an insulation layer can be formed in the casting mold to help control the temperature distribution in the inner mold, thereby achieving a more uniform temperature distribution in the inner mold and ensuring that the temperature in the entire casting mold is relatively stable.

[0012] (2) A number of insulating risers are arranged in a ring shape on the surface of the insulating sleeve, so that when the molten metal is poured into the casting mold, the solidification time of the molten metal in the casting mold is prolonged, the heat loss in the casting mold is effectively reduced, and the molten metal in the casting mold can be better solidified inside the casting. The cooling rate of the molten metal in the casting mold is delayed by the insulating risers, thereby ensuring that the molten metal is fully filled and solidified during the entire casting process, avoiding the problem of affecting the molding quality due to uneven cooling rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a side view of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the thermal insulation cover of the utility model.

[0016] In the figure: 1. Outer mold; 2. Inner mold; 3. First test block; 4. Insulation sleeve; 5. Insulation riser; 6. Riser positioning plate; 7. Second test block; 8. Sand accumulation trough; 9. Inner gate; 10. Air vent. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The utility model provides Figure 1-3 The casting mold for the front seat of an electric wheel frame shown includes:

[0019] An outer mold 1, wherein an inner mold 2 is provided inside the outer mold 1, and two sets of first test blocks 3 are provided on the surface of the outer mold 1;

[0020] An insulation sleeve 4 is arranged inside the inner mold 2. A plurality of insulation risers 5 are arranged in a ring shape on the surface of the insulation sleeve 4. The surface of the insulation riser 5 is provided with a riser positioning plate 6 for supporting and positioning the insulation riser 5. The riser positioning plate 6 can improve the efficiency of the casting process, ensure the correct placement and positioning of the insulation riser 5, and reduce the need for adjustment and correction. Two groups of second test blocks 7 are provided on the surface of the inner mold 2.

[0021] The surface of the outer mold 1 is provided with a sand accumulation groove 8, and one side of the sand accumulation groove 8 is provided with an inner gate 9. The sand accumulation groove 8 collects impurities in the molten metal to prevent these impurities from affecting the quality of the casting, and the molten metal is injected into the casting mold through the inner gate 9.

[0022] An air vent 10 is provided on the surface of the outer mold 1 and on one side of the sand accumulation groove 8. When the molten metal is filled into the casting mold, the molten metal will generate gas. The gas can be discharged smoothly through the air vent 10 to avoid gas retention inside the casting mold, thereby reducing the pores in the molten metal.

[0023] The casting mold for the front seat of the electric wheel frame insulates the molten metal poured in the casting mold by arranging an insulation sleeve 4 in the middle of the inner mold 2, so as to form an insulation layer in the casting mold, which helps to control the temperature distribution in the inner mold 2, thereby achieving a more uniform temperature distribution in the inner mold 2 and ensuring that the temperature in the entire casting mold is relatively stable. The several insulation risers 5 arranged in a ring shape on the surface of the insulation sleeve 4 make the pouring temperature of the molten metal 1540-1570℃ when the molten metal is poured in the casting mold. The insulation risers 5 extend the solidification time of the molten metal in the casting mold, effectively reduce the heat loss in the casting mold, and enable the molten metal in the casting mold to better solidify inside the casting. The insulation risers 5 delay the cooling rate of the molten metal in the casting mold, thereby ensuring that the molten metal is fully filled and solidified during the entire casting process, avoiding the problem of affecting the molding quality due to uneven cooling rate.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A casting mold for the front seat of an electric wheel frame, characterized in that: include: An outer mold (1), wherein an inner mold (2) is arranged inside the outer mold (1), and two groups of first test blocks (3) are arranged on the surface of the outer mold (1); A heat-insulating sleeve (4) is arranged inside the inner mold (2); a plurality of heat-insulating risers (5) are arranged in a ring shape on the surface of the heat-insulating sleeve (4); a riser positioning plate (6) for supporting and positioning the heat-insulating risers (5) is provided on the surface of the heat-insulating risers (5); and two groups of second test blocks (7) are provided on the surface of the inner mold (2).

2. The electric wheel frame front seat casting mold according to claim 1, characterized in that: A sand accumulation groove (8) is provided on the surface of the outer mold (1), and an inner gate (9) is provided on one side of the sand accumulation groove (8).

3. The electric wheel frame front seat casting mold according to claim 2, characterized in that: An air outlet hole (10) is provided on the surface of the outer mold (1) and located on one side of the sand accumulation groove (8).

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