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Detection method of sandbox sealing performance

A detection method and sealing technology are applied in the detection field of sand box sealing, which can solve the problems of drop of vacuum degree of sand box, insufficient negative pressure, collapse of sand box, etc., and achieve flexible operation, guaranteed vacuum degree and low cost. Effect

Inactive Publication Date: 2016-06-08
KOCEL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When molding and pouring, due to the long-term baking of high-temperature molten metal and high-temperature molding sand, the filter screen is easily damaged. In this way, when vacuuming, the molding sand enters the suction channel through the damaged filter screen and causes blockage, so that the sand box Decreased vacuum and insufficient negative pressure will cause collapse, wrinkle and air holes of the sand box

Method used

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  • Detection method of sandbox sealing performance
  • Detection method of sandbox sealing performance
  • Detection method of sandbox sealing performance

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Experimental program
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Embodiment Construction

[0036] figure 1 It is a schematic flow chart of an embodiment of the testing method for the tightness of the sand box 1 of the present invention. Such as figure 1 As shown, the method for testing the airtightness of the flask 1 in this embodiment may include the following steps.

[0037] S1: Step 1: Seal the sand box 1, and then pass compressed air into the sand box 1 to make the sand box 1 in a positive pressure state.

[0038] Specifically, turn the sand box 1 to the detection station on the detection track 2, then connect the vacuum docking hole 3 at the bottom of the sand box 1 with the hydraulic sealing valve 4, and install the top sealing cover 5 with the sand box 1 , and use the standard C-type card 6 to clamp firmly, connect the sand box 1 with the compressed air valve 7 through the compressed air hole on the top sealing cover, and then pass compressed air into the sand box 1 to make the sand box 1 positive pressurized state for inspection.

[0039] S2: Step 2: Rec...

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Abstract

The invention provides a detection method of the sandbox sealing performance. A sandbox is sealed, then compressed air is fed into the sandbox so as to enable the sandbox to be in a positive pressure state, and then whether the sandbox leaks air is judged; and if yes, the sandbox is repaired and then detected again, and if not, the sandbox is determined to be qualified. According to the scheme, the sealing performance of the sandbox is dually ensured by a standard inspection flow and a standard inspection method, the vacuum degree of casting is further ensured, box crushing, winkling and air holes caused for insufficient sealing performance of the vacuum sandbox are effectively controlled, the detection method is reusable, the operation is flexible and simple, the cost is low, and the method is suitable for wide popularization.

Description

technical field [0001] The invention relates to the technical field of airtightness detection, in particular to a method for detecting the airtightness of a sandbox Background technique [0002] The cost of castings produced by negative pressure compact casting technology is only 20% to 60% of the cost of castings produced by sand casting technology, and it can be carried out step by step from simple to complex. It is widely applicable to the mass production of cast iron, cast steel and non-ferrous metal castings. It is especially suitable for technical transformation and new product production of small and medium-sized factories. These include auto parts and high-precision, high-strength automotive castings. [0003] Negative pressure solid mold casting technology is an advanced casting technology developed on the basis of modern solid mold casting by absorbing the advantages of negative pressure casting. It is also called negative pressure lost foam casting abroad. It use...

Claims

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Application Information

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IPC IPC(8): G01M3/26
CPCG01M3/26
Inventor 潘凤英杨争光彭利民
Owner KOCEL EQUIP
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