Injection molding quality testing method and testing device for L-shaped water pipes used in refrigerator ice-making water storage boxes

Abstract

The invention relates to a method and a detection device for the injection molding quality of an L-shaped water pipe used in an ice-making water storage box of a refrigerator. The detection method includes the following steps: recording the air pressure A when the air source is not connected to the water pipe to be tested; Connect to one end of the water pipe to be tested, and record the air pressure B of the air source; compare the first difference between air pressure B and air pressure A with the standard deviation range, if it is within the range, it is a qualified product, and if it exceeds, it is an unqualified product ; The other end of the water pipe to be tested is closed, record the air pressure C in the water pipe to be tested, compare the second difference between the air pressure C and the standard value with the first standard deviation, if it is greater, it is an unqualified product; if it is less than, Then stop the air intake, record the air pressure D, compare the third difference between the air pressure D and the air pressure C with the second standard deviation, if it is less than, it is a qualified product, if it is greater, it is an unqualified product. Through the invention, the detection result of the injection molding quality of the water pipe is accurate and the detection speed is fast.

Description

technical field [0001] The invention relates to a detection method and a detection device for the injection molding quality of an L-shaped water pipe used in an ice-making water storage box for a refrigerator. Background technique [0002] The refrigerator has a water storage box and an ice making box. The water storage box is used to temporarily store the purified water before ice making. After the ice is taken out, the purified water stored in the water storage box will be automatically pumped to the ice making machine. In the ice box, when the ice making function is turned on, the water pipe connected to the water pump needs to be made into an L shape. The L-shaped water pipe is inserted at the bottom of the water storage box, and the other end is above the ice making box. Since the ice box needs to be pulled out and reversed, it is impossible to install a sensor to sense the water volume. In order to accurately measure the water volume in the ice box, the only way to ens...

AI Technical Summary

Problems solved by technology

Since the ice box needs to be pulled out and reversed, it is impossible to install a sensor to sense the water volume. In order to accurately measure the water volume in the ice box, the only way to ensure the ice box is to control the water output of the water pump and the sealing during pumping. Therefore, the injection molding quality of the L-shaped water pipe is particularly important. If the quality of the L-shaped water pipe is not up to standard, it will seriously affect the pumping flow and sealing performance.

In the prior art, in the production process of L-shaped water pipe injection molding, two mold needles need to be inserted from two directions of 90 degrees. Due to the problem of the cooperation of the two mold needles, burrs are prone to appear at the 90-degree corner. The result is that the water flow in the pipeline will be affected, and the water volume of the ice box will be affected when it is finally installed on the refrigerator; There is a risk of cracks, which may cause air to enter when the water pump pumps water, and also cause insufficient water in the ice box

The above two problems are unavoidable in the current production process and may appear at any time, requiring 100% inspection before assembly, so a fast and accurate detection method is needed

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