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A casting method for lead-free water meter case

A technology of lead-free water meter and lead water, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of high lead content, reduce costs, etc., achieve ideal casting effect, reasonable casting process, and control casting yield and the effect on the defect rate

Inactive Publication Date: 2014-10-22
SHANGHAI TIANSHEN COPPER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to cope with market competition, some manufacturers of water watch cases blindly reduce costs and use lead instead of tin to smelt brass, resulting in excessive lead content in the material

Method used

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  • A casting method for lead-free water meter case
  • A casting method for lead-free water meter case
  • A casting method for lead-free water meter case

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Embodiment Construction

[0048] Below we will further elaborate on the casting method of the lead-free water meter and watch case of the present invention in conjunction with the accompanying drawings and specific embodiments, in order to understand its composition, structural design and manufacturing process more clearly, but it cannot be based on This limits the protection scope of the present invention.

[0049] The present invention designs a new type of lead-free water-cooled water meter. The lead-free water-cooled water meter includes a watch case and a water meter watch core arranged in the watch case. The watch case is made of lead-free brass copper ingots by casting way made. As a new choice casting material, the chemical composition of the lead-free brass copper ingot is as follows:

[0050] Element Mass %

[0051] Copper: 60.5~63.5%

[0052] Zinc: 35.7~37.5%

[0053] Bismuth: 0.75%~0.95%

[0054] Aluminum: 0.50%~0.60%

[0055] Iron: 0.11%~0.14%

[0056] Tin: 0.14%~0.24%

[0057] ...

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Abstract

The invention relates to a lead-free water meter. The lead-free water-cooling water meter comprises a meter case and a water meter core arranged in the meter case, the meter case is formed by casting a lead-free brass ingot, the lead-free brass ingot comprises the chemical components in percentage by element mass: 60.5-63.5% of brass, 35.7-37.5% of zinc, 0.75-0.95%bismuth, 0.50-0.60% of aluminum, 0.11-0.14% of ferrum, 0.14-0.24% of tin, 0.01-0.03% of nickel, no more than 0.25% of lead, 0.03% of manganese, no more than 0.02% of phosphorous, no more than 0.01% of arsenic, no more than 0.001% of sulfur, no more than 0.002% of chromium and the balance of trace element. The lead-free water meter is manufactured by the special lead-free brass ingot, so that the water meter is manufactured and used safely and reliably, the lead content can be controlled so as to achieve the purpose of protecting the health of a human body.

Description

technical field [0001] The invention relates to a water meter, in particular to a lead-free water meter, a case of the water meter and a manufacturing method thereof. Background technique [0002] It is well known that metallic lead is a harmful substance to the human body. If the lead precipitation of ordinary copper water meters exceeds the standard, it will cause secondary pollution of water sources and pose a great threat to human health. According to medical analysis, excessive lead in the human body will cause low immunity of the human body. After lead enters the body, it will cause harm to multiple systems such as nerves, hematopoiesis, digestion, kidneys, cardiovascular and endocrine. For adults, it is more likely to form a health hazard. [0003] Water meters with excessive lead content will increase the lead content in drinking water to exceed the standard, first of all, it is caused by the excessive lead content in the copper material of the water meter. Acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04B22C9/24G01F15/14
Inventor 蒋明川
Owner SHANGHAI TIANSHEN COPPER GRP CO LTD