Specifically introduce how to increase the processing accuracy of plastic parts


Author: MULAN -Plastic Molding Manufacturer

1. Mold processing quality includes processing accuracy and surface plastic parts processing accuracy is the degree of conformity between the actual size, shape and position of the surface of the processed part and the ideal geometric parameters required by the drawing. The ideal geometric parameters, in terms of size, are the average size; in terms of surface geometry, they are circles, cylinders, planes, cones, and straight lines; for the mutual position between surfaces, they are parallel and perpendicular , coaxial, symmetrical, etc. The deviation between the actual geometric parameters of the part and the ideal geometric parameters is called the machining error.

Regardless of the processing method, the actual parameters obtained will not be accurate. From the perspective of the function of the component, as long as the processing error is within the tolerance range required by the component drawing, the processing accuracy is considered to be guaranteed. 2. Main aspects affecting processing accuracy 2.1 Dimensional accuracy refers to the degree of conformity between the actual size of the plastic part after processing and the center of the tolerance zone of the size. Dimensional accuracy is controlled by dimensional tolerances.

Dimensional tolerance is the allowable variation in component dimensions during cutting. In the case of the same basic size, the smaller the dimensional tolerance and the higher the dimensional accuracy. 2.2 Shape accuracy refers to the degree of conformity between the actual geometric shape of the processed component surface and the ideal geometric shape.

2.3 Position accuracy refers to the actual position accuracy difference between the relevant surfaces after plastic parts are processed. 3. The relationship between dimensional accuracy, shape accuracy and position accuracy Usually when designing machine parts and specifying its machining accuracy, attention should be paid to controlling the shape error within the position tolerance, and the position error should be smaller than the size tolerance. That is to say, for precision parts or important surfaces of parts, the shape accuracy requirements should be higher than the position accuracy requirements, and the position accuracy requirements should be higher than the dimensional accuracy requirements.

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