Sand box for lost foam casting

A technology of lost foam casting and sand box, which is used in casting and molding equipment, mold boxes, manufacturing tools, etc., can solve the problems of blockage, looseness, and poor evacuation effect of thermal insulation sand.

Inactive Publication Date: 2016-03-23
CHONGQING TETAI MACHINE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the structure, airtightness and evacuation channel of the flask are very important to the lost foam casting. In the existing flask structure, steel pipes with holes are installed on the inner liner of the flask. The thermal insulation sand is easy to fall into the steel pipe. After a long time, the steel pipe will be blocked by the fine thermal insulation sand, resulting in poor evacuation effect and affecting the normal casting process. , and the existing sand boxes are mostly welded by steel plates, welding defects are prone to appear at the welds, resulting in air leakage, which affects the vacuum degree in the casting process and affects product quality

Method used

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  • Sand box for lost foam casting
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Embodiment Construction

[0014] The present invention is described in further detail below by specific embodiments:

[0015] Reference numerals in the drawings include: box 10 , connecting pipe 20 , suction pipe 30 , elastic member 31 , flexible member 32 , rotating shaft 33 , cam 34 , steel ball 35 , vane 36 , and stopper 37 .

[0016] The example is basically as attached figure 1 and figure 2 Shown: a flask used for lost foam casting, including a box body 10, the bottom of the box body 10 is provided with four suction pipes 30 arranged side by side, and the box body 10 is also provided with adjacent suction pipes for communication 30 of the connecting pipe 20. A suction hole is provided on the side wall of the suction pipe 30 , and an elastic member 31 is installed on the outer wall of the suction pipe 30 , and the elastic member 31 is a first compression spring. A stopper 37 is installed at the end of the elastic piece 31 to prevent the protective sand from falling into the air suction hole.

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Abstract

The invention belongs to the technical field of die manufacturing and particularly discloses a sand box for lost foam casting. The sand box comprises a box body. Multiple air suction pipes distributed in parallel are arranged at the bottom of the box body. A connecting pipe used for being communicated with the adjacent air suction pipes is arranged in the box body. Air suction holes are formed in the side walls of the air suction pipes. Elastic pieces are arranged on the outer walls of the air suction pipes. Stop blocks for preventing protective sand from falling into the air suction holes are installed at the ends of the elastic pieces. Flexible pieces are arranged on the inner walls of the air suction pipes. One end of each flexible piece is fixed to the inner wall of the corresponding air suction pipe and the other end of each flexible piece is provided with a steel ball. Rotary shafts rotationally connected with the inner walls of the air suction pipes are arranged on the inner walls of the air suction pipes. Each rotary shaft is provided with blades and a cam used for impacting the corresponding steel ball.

Description

technical field [0001] The invention relates to the technical field of mold making, in particular to a flask for lost foam casting. Background technique [0002] Lost foam casting (also known as solid casting) is to bond and combine paraffin or foam models similar in size and shape to castings into model clusters. After brushing refractory paint and drying, they are buried in dry quartz sand and vibrated for modeling. The new casting method is a new casting method in which the model is gasified by pouring down, and the liquid metal occupies the position of the model, and solidifies and cools to form a casting. [0003] The lost foam casting technology has the advantages of good surface quality of casting products, less machining allowance, and low production cost, and is widely used. During the lost foam casting process, the sand box needs to be evacuated. Therefore, the influence of the structure, airtightness and evacuation channel of the sand box on the lost foam casting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C21/00
Inventor 龙宪权
Owner CHONGQING TETAI MACHINE MFG CO LTD
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