Electro-thermic working tool used for evanescent casting model

A processing tool and disappearing casting technology, which is applied in the field of electrothermal processing tools, can solve the problems of affecting appearance and product grade, poor surface quality of cast iron parts, poor processing surface quality, etc., and achieve light structure, low manufacturing cost and neat processing surface. Effect

Inactive Publication Date: 2014-04-09
TIANJIN TIANQI DELI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the polystyrene material is relatively soft, it has strong toughness and is laborious when cutting with a blade
In addition, because polystyrene is a particle-bonded substance, it is easy to cause particles to fall off during cutting.
The above reasons lead to poor quality of the machined surface after manual processing, and finally lead to poor surface quality of the produced iron castings, which affects the appearance and product grade

Method used

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  • Electro-thermic working tool used for evanescent casting model

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Embodiment Construction

[0011] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. Such as figure 1 As shown, an electrothermal processing tool for a lost casting model includes a tool body 1, a resistance wire 2 and a transformer 5. The workpiece body is in an "F" shape, and the long side of the tool body is used as a handle 3. The tool body The body is made of insulating material; the two ends of the resistance wire are respectively connected to the two short side ends of the workpiece body, and the resistance wire is connected to the transformer through a wire 4 . In order to be neat and tidy, the inside of the tool body is hollow, and the wire passes through the inside of the tool body to connect with the resistance wire. In order to be able to control the temperature of the resistance wire, the transformer adopts an adjustable transformer.

[0012] When in use, first adjust the vo...

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Abstract

The invention relates to the technical field of the automobile die making, and especially relates to an electro-thermic working tool used for an evanescent casting model. The tool comprises a tool body, a resistance wire and a transformer, the tool body has an F-shaped appearance, and is made by using an insulation material; and two ends of the resistance wire are connected with two short edge end portions of the tool body, and the resistance wire is connected with the transformer through a lead. The tool has a simple structure, utilizes the low melting point characteristic of polystyrene and uses the resistance wire as a cutting material. When the tool is used, the resistance wire is heated to an appropriate temperature, then polystyrene is cut, the cut position is molten at a high temperature, and a waste material is separated from a model body. The tool has the advantages of low making cost, light structure and use convenience, allows the molten and cut working surface to be tidy and smooth, and thoroughly eliminates the particle separation phenomenon.

Description

technical field [0001] The invention relates to the technical field of manufacturing automobile molds, in particular to an electrothermal processing tool for a lost casting model. Background technique [0002] The body of the automobile panel mold is large in size and complex in shape, so its blank is usually produced by casting. In addition, the automobile panel mold is a typical single-piece production without repeatability, so the traditional wood casting cannot be used, and the lost foam casting method can only be used. [0003] Lost foam casting uses polystyrene, which is commonly referred to as foam plastic, as a raw material, and processes it into a shape consistent with the body of the automobile panel mold according to the drawings, and then embeds it in a sand box. When the molten iron is injected, the polystyrene is vaporized and volatilized under high temperature, and the molten iron flows into the space left by the volatilized polystyrene, and after cooling and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02
Inventor 苏越李天雨
Owner TIANJIN TIANQI DELI TECH DEV
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