Product wrinkles. The main factors causing product wrinkles include: excessive relaxation of the sheet; excessive heating time of the sheet; too large a molding angle of the mold, etc.

　　Insufficient surface flatness of the product. The reasons for the uneven surface of the product mainly depend on the following aspects: insufficient cleanliness of the sheet or mold; too large vacuum holes of the mold; insufficient number of vacuum holes of the mold; sheet-like structures on the mold, etc.

　　Hospital medical equipment housing Thick plate thermoforming Practical exploration of process improvement

　　Improvement of the structure of the housing thick plate thermoforming product

　　The hospital outpatient medical equipment housing has a relatively large volume and area, and a curved design can be adopted to maintain the external aesthetics of the product structure and effectively avoid the problems of thick plate thermoforming. The optimization of its structure mainly includes the following aspects:

　　Improve the depth of the equipment. Because many hospital medical equipment has very deep barrels, this Thick plate thermoforming poses a huge challenge to the product. In order to improve the product forming effect, the cavity forming and mold assist decompression method can be used, so that the product plastic sheet is heated between the upper and lower molds and the small amount of gas between the mold and the plastic sheet is sucked out, so that the sheet is adsorbed on the mold, and then the mold is slowly decompressed, so that the plastic sheet is completely adsorbed on the cavity, and finally demolded. Through this method of forming with concave and convex molds, the demolding angle of the equipment housing product can be effectively improved, and the width-depth ratio of the housing product can be reduced.

　　Improve the tangential contact at the corners. Based on the installation standards, the tangential contact at the corners of the medical equipment housing can be improved.

　　Adopt installation bonding. For hospital outpatient medical equipment housing thick plate thermoforming products, the installation bonding method can be used to replace the flip design. And use two-layer thick plate thermoforming technology to replace the improved process technology of single-sided thick plate thermoforming board bonding to improve the compressive strength of the housing product.

　　Improvement of the main parameters of the medical equipment housing thick plate thermoforming process

　　Because the raw materials of hospital outpatient medical equipment housings are mainly ABS, ABS/PC, and PC, HIPS, PET, PP and other accessories are used, the process parameter analysis and improvement of these different materials are mainly involved in the following points:

　　Plastic sheet drying time. This is Thick plate thermoforming a state parameter of the shrinkage rate when the sheet is dried, which is simultaneously related to and affects the thick plate thermoforming of the medical equipment housing. When the drying time of different materials is respectively: HDPE is 8 hours, PE is 6 hours, ABS is 8 hours, PC is 6 hours, and ABS/PC is 8 hours, it indicates that the function of the medical equipment housing thick plate thermoforming product is relatively stable.