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Production method of selector valve machine barrel

A production method and valve selection technology, applied in coating, casting molding equipment, casting molds, etc., can solve the problem that the surface of castings is not easy to produce, and achieve the effects of less defects, efficient heat dissipation, and enhanced heat dissipation speed.

Active Publication Date: 2020-01-24
宁波开发区安德鲁精铸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a production method for selecting a valve barrel, which enhances the heat dissipation rate when the casting is cooled, and the surface of the casting is not prone to defects

Method used

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  • Production method of selector valve machine barrel
  • Production method of selector valve machine barrel
  • Production method of selector valve machine barrel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A production method of a selection valve barrel includes the following steps:

[0043] Step S1: Reference figure 1 , Make a wax mold 1 with the same shape as the barrel of the selector valve; wax mold 1 is made of a mixture of paraffin wax and stearic acid. The manufacture of wax mold 1 is processed by a lathe. The lathe borings the middle hole and milling of the wax mold 1. Out the outer side wall of the wax mold 1. After the wax pattern 1 is manufactured, the personnel moisten the kerosene with a cloth and wipe the surface of the wax pattern 1, and then quickly blow off the kerosene on the surface of the wax pattern 1 with compressed air; the cloth is a cloth with fine fibers and high softness.

[0044] When the lathe is performing the boring and milling process, it is inevitable to leave striped knife marks on the surface of the wax mold 1, and the marks and spacing of the knife marks are small. Kerosene can dissolve the wax pattern 1, and under the combined action of cl...

Embodiment 2

[0062] A production method of the selection valve barrel. The difference between the second embodiment and the first embodiment is:

[0063] Reference Figure 4 , There is no fan 41 in the sand pit 4, and no metal mesh layer 3 on the inner wall of the mold shell 2. In step S5, the cooling cylinder 5 and the mold shell 2 are put into the sand pit 4 together, and the outer diameter of the cooling cylinder 5 is set as follows: the cooling cylinder 5 is close to the middle hole wall of the mold shell 2 through the outer wall, and the cooling cylinder 5 directly faces the mold shell 2. The inner wall of the hole supports and conducts heat. The cooling liquid in the duct 6 is cooling oil, and the boiling temperature of the cooling oil is much higher than that of water, which can meet the cooling requirements of the casting from beginning to end.

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Abstract

The invention discloses a production method of a selector valve machine barrel, and relates to a metal casting method. According to the technical scheme, the production method includes the steps thatS5, a sintered die shell is put in a sand pit, the die shell is filled with sand, and liquid metal is poured into a cavity; and S6, the metal waits for being cooled and solidified; a cooling barrel ishoisted into a middle hole of the die shell, the outer wall of the cooling barrel is adjacent to the die shell, a cooling passageway is formed in the cooling barrel, a heat exchanger and a pump communicating with the heat exchanger through a guide pipe are arranged outside the sand pit, and the two ends of the guide pipe communicate to a cooling inlet and a cooling outlet separately. During S6, the pump is started, and cooling liquid in the guide pipe and the cooling passageway flows in a circulating manner. According to the production method, through the arrangement of the cooling barrel, the heat dissipation speed during casting cooling is increased, and no defects are easily generated on the surface of a casting; while the casting is subjected to efficient heat dissipation with the production method, heat dissipation is uniform, and the casting does not easily deform in the cooling process; and the cooling speed of the casting can be controlled to a certain degree, and the formingquality of products is further improved.

Description

Technical field [0001] The invention relates to a metal casting method, in particular to a production method of a selector valve barrel. Background technique [0002] The selector valve is mostly used in the field of fire protection. The selector valve is mainly used in devices where a carbon dioxide source supplies more than two protection areas. Its function is to select the direction of carbon dioxide release to achieve rapid fire extinguishing in the selected direction. [0003] The existing Chinese utility model patent with authorized announcement number CN204004715U discloses a selector valve, which includes a valve body, an upper cover body, a base, a valve, a ring-shaped upper and lower sealing partition, and a return spring. The valve body of this selector valve is also known as the barrel. The barrel is a cylinder with both ends passing through. The barrel is generally made of aluminum or stainless steel. The outer diameter of the large-size barrel can reach more than 150...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C9/12B22C9/24B22D27/04B22C3/00
CPCB22C3/00B22C9/043B22C9/12B22C9/24B22D27/04
Inventor 韩志友葛盈华裘月娣
Owner 宁波开发区安德鲁精铸有限公司