1. Blister proofing
Production scheduling determines which method to use to develop the prototype mold (gypsum mold/aluminum mold) according to the customer's requirements and the complexity of the product. The development time of the sample is generally 3-5 working days. Blister proofing is mostly done with plaster mold. The steps are as follows:
1. Firstly use the hand-made mud paste to form the contour; 2. Place the blister blank on the blister plate machine; 3. Pour into the blister blank with the special plaster, and dry it to form the gypsum blank; 4 The use of electric milling machine for deep processing of gypsum blanks and regular shapes; 5 manual grinding and manual addition of parts; 6. Then put a single acupoint plaster mold into the plastic plate machine to play the plastic sample required for imposition; 7. will be imposition of the single The hole blister is put together into the gypsum according to the size requirements, and the gypsum is dried to form the whole gypsum mold blank; 8. The entire gypsum mold blank is polished, repaired and drilled; 9. Put it into the blister plate machine to suck Forming a complete sample; 10. Manually trimming and edge-sealing according to the finished product size to complete the entire proofing process. If there is a demand, the customer needs to provide a color card sticker or a color box to make the overall fit.
2. Production and production of molds
After the sample is confirmed by the customer, the production order is usually placed. The production schedule determines which mold is produced according to the complexity of the production molding:
Electroplated copper mold
The process is to spray a layer of conductive agent on the surface of the sampled blister, and then deposit a thick layer of copper in the electrolytic bath. It takes 3-4 days to electroplate the copper mold, and then grout the copper mold. (Increase hardness), drill holes, and polish. The advantage of using electroplated copper mold production is that the surface of the blister product is smooth, the cost is moderate, and the durability is moderate. The disadvantage is that the production of the precision blister product cannot be completed and the appearance of the line is not as beautiful as the aluminum mold.
2. Aluminum mold (also suitable for aluminum mold proofing operation)
Aluminum mold production must first use computer design drawings, and then CNC CNC machine tools, the advantage is that the plastic size is high precision, the appearance of the line is better than the electroplated copper mold, and the durability is strong. The disadvantage is that the production cycle is slightly longer and the mold cost is high.
& Since the molding range of the fully automatic blister machine is about 710*1200mm, it is necessary to assemble a single mold together for the copper mold or the aluminum mold to achieve the molding size. This process, which we call typography, requires the molds to be placed on the slatted planks.
& For the difficult-to-form product, the upper mold should be made. When the bottom mold is vacuum-molded, the pressure is applied from above the sheet to evenly stretch the sheet to each part, otherwise the local thickness will be caused. thin. The production cycle of the production mold is 4-7 days.
three. Blister molding production
1. It is produced by automatic high-speed plastic forming machine. The principle is:
The sheet is automatically pulled into an electric oven to be heated to soften. Above the mold is pulled down, the mold is moved up and vacuumed, and the softened sheet is adsorbed to the surface of the mold, while the spray-like cold water is cooled to cool the plastic surface, and the mold is released. Pull back into the storage bin. The automatic cutter separates the molded part to complete the entire molding process.
2. During the molding process, the quality inspectors conduct quality inspections on all molding processes. The quality inspection contents include:
& Material Thickness: The thickness of the measured sheet should be consistent with the thickness required by the production schedule;
& Transparency and material points: blister blistering should be transparent to the naked eye, and the surface is free of impurities;
&Adsorption is not in place during the molding process: it means that the shape of the plastic is deformed, and it does not absorb the same product as the mold;
& The thinning of the plastic during the molding process means that the temperature is too high during the molding process or the vacuum is too large to cause the local thickness to be thin;
& Product surface drawing during molding: refers to the linear protrusion on the surface of the product caused by excessive temperature during the molding process;
& uneven thickness during the molding process: these problems need to be debugged in place after the good mold is applied, including: the advancement time of the sheet, the temperature and time of sheet heating, the strength and time of vacuuming, and the time of falling of the upper mold. , location, depth, location of the mold in the row, whether to add accessories between the molds and so on.
four. Blanking package
The large-sized semi-finished product is punched into a single product on a cutting machine. The principle is to put a rubber sheet on the bottom plate of the cutting machine, put the formed plastic semi-finished product on the offset plate, and then clamp the knife mold on a single plastic, and cut the single finished product through the movement under the cutting bed. For demanding bulbs, cold stamping (a male mold, a master mold) and cold punching are required.
Fives. Sampling before storage
Before the storage, according to the quality inspection standards of different products, the packaged products are sampled before storage, and the samples are qualified for storage.