Plastic bottle size detection

The appearance of the bottle body: The appearance of the plastic bottle mainly includes the quality characteristics of the bottle body, such as the overall shape of the bottle body, the surface color tone, the glossiness, and the appearance quality. The appearance quality inspection is based on the fact that different parts of the plastic bottle have different defects and different appearance defect standards have been formulated. The appearance quality of the bottle body is usually marked with the minimum allowable limit of the actual object or a standard sample is made. The standard sample is preferably sealed with one defect of each type for verification. However, from the overall requirements of plastic bottles, the appearance of the quality should have a uniform milky white color, no significant color difference, the bottle surface should be smooth, smooth, does not allow deformation and significant scratches, does not allow the trachoma, oil, Bubbles, the mouth of the bottle should be smooth, and have a good fit with the bottle cap.

Bottle body size detection: Due to the different precision of the production of medical plastic bottles, the raw material and process parameters are different, and the dimensional accuracy of the appearance will be different. Generally use the same equipment, plastic bottles produced by the same kind of raw materials and molding methods, should be stored at a constant temperature room temperature of 23 plus or minus 2 degrees Celsius for a certain period of time and then measured, and under the stable process molding conditions, the appearance of the control products Appearance measurement is performed on the reference dimensions of various parts of the design drawings, and several appearance sizes are measured with emphasis.

1 Measurement of the overall height of a plastic bottle: The so-called overall height of the bottle refers to the vertical distance from the mouth of the bottle to the bottom of the bottle. The test method is to place the plastic bottle on a horizontal surface and touch one end of the caliper to the highest point of the bottle mouth. , Then rotate the bottle 360 ​​degrees, read the maximum and minimum size values, and check with the size of the plan. For example, the 40-60mm bottle height dimension error should be controlled within 0.5mm.

2 Measurement of the outer diameter of the plastic bottle mouth: The specific measurement method is to measure the scale of the tool across the center of the bottle mouth, avoiding the position of the bottle mold clamping line, the spindle tight * mouth thread, the round bottle The mouth is rotated 360 degrees, the maximum and minimum values ​​are measured, and compared with the design diagram of the bottle body, the external diameter error should be controlled at positive and negative O. 10mm range.

Measurement of the diameter of the shape of the plastic bottle: The measurement method is to use the measuring surface of the vernier caliper to contact the maximum diameter measurement of the bottle body, tighten the vernier caliper, rotate the plastic bottle body 360 degrees, and record the size of the maximum and minimum values The error should be controlled at O. 10mm range.

3 The measurement of the diameter of the plastic bottle: The measurement method is to use the measuring surface of the vernier caliper to contact with the maximum diameter of the bottle body to measure, tighten the vernier caliper, rotate the plastic bottle body 360 degrees, and record the maximum and minimum values. Size, its error should be controlled within 0.1Omm range.

4 Measurement of the wall thickness of various parts of the plastic bottle: For the medicinal plastic bottle of the circular revolving body, the measurement area of ​​the symmetrical part is cut with a tool, so that the measurement tool can enter the detection point where various parts of the bottle body can be measured. At this time, the thickness of the plastic bottle mouth, the thickness of the shoulder, the thickness of the body, and the thickness of the bottom of the bottle can be strictly measured, and the maximum and minimum values ​​can be recorded. Whether the dimensional tolerance is within the standard requirements.