Process for making water channel of outlet water unit

Abstract

The invention discloses a process for making a water channel of an outlet water unit. The process is characterized in that an air tap is arranged at a position of an injection mold opposite to a water inlet or a water outlet of a cavity of the outlet water unit; a material-overflowing well is arranged at the water inlet or the water outlet opposite to the outlet water unit; plastic materials are injected to the cavity until the cavity is filled to reach the material-overflowing well; when the part of the plastic materials in the cavity adjacent to the cavity wall is hardened, high pressure nitrogen gas or high pressure fluid is injected from the air tap to extrude an abnormal water channel inside the plastic materials communicated with the water inlet and the water outlet of the outlet water unit body; the part of the plastic material extruded by the high pressure nitrogen gas or the high pressure fluid flows into the material-overflowing well; and the outlet water unit with the abnormal water channel is obtained by cooling. Therefore, the formation of the abnormal water channel inside a plastic product can be realized, the forming method of the water channel inside a conventional plastic product is changed, and the injection-molded product has better integrity, thus the pressure resistance and the service life of the product are ensured.

Description

technical field [0001] The invention relates to a manufacturing process of water channels for water outlet devices such as faucets and water outlet joints. Background technique [0002] With the continuous improvement of people's living standards, household daily necessities are constantly developing in the direction of high quality and high grade. Therefore, the shape of faucets commonly used in homes has also undergone various changes. The traditional production method of faucets is mostly made of metal copper casting to form special-shaped water channels inside. Because the price of copper has been increasing in recent years, and the lead component in copper has caused certain pollution to water quality, developed countries have stipulated that faucets The copper used must be lead-free or very low-lead brass, which is more expensive. [0003] With the continuous improvement of material costs and the requirements of environmental protection and safety, the industry has ch...

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Problems solved by technology

[0003] With the continuous improvement of material costs and the requirements of environmental protection and safety, the industry has chosen plastic material molding faucets. Due to the molding characteristics of plastic materials, it can be made by core injection molding for straight or regular pipelines, and for internal waterways. Currently, splicing (such as ultrasonic welding or mold slip molding) is used to form a water outlet device with an internal water channel after split molding. The spliced ​​internal water channel needs to have a certain water pressure resistance and the local splicing strength of the product is insufficient. Therefore, The failure of the secondary splicing process to ensure the service life of the water outlet device is a problem that plagues the industry

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