Pad printing silicone is professionally used in the manufacture of pad printing heads. Using silica gel as a carrier to transfer the pattern on the steel plate to the product is called pad printing . There is an important component in the application of pad printing silicone, that is, the pad printing pad. The pad printing pad requires fine quality without impurities, good oiling, good resilience, and clear pattern printing. Therefore, the production of high-quality pads The rubber head is especially important in pad printing. Next, I will briefly introduce the process of mold opening and the details of the red leaf pad printing rubber head:
The red leaf pad printing glue headand pad printing glue mold opening process can be divided into the following ten steps:
Step 1: Choose a suitable pad printing rubber headmold;
Why choose a suitable pad printing head mold? That is because the size of the pad is determined according to the size of the pad printing pattern. The size ratio of the pad and the pattern is generally 3:1 . If a suitable pad die is not selected, it will cause pad printing The phenomenon that the rubber head is not durable.
Step 2: Choose the Adhesive Board That Fits the Mold
Cover the mold when it is about to be formed. At this time, you can choose to punch holes. After the glue is formed, it will be bonded to the glue head.
Step 3: Prepare the materials and tools needed to make the rubber head.
Prepare a cup for stirring, a glass rod, and choose silica gel with different properties according to different pattern sizes.
Step 4: Use soapy water to clean the mold, and wipe it with gauze
This is a necessary common-sense step to avoid the impurity that causes the pad printing head not to be durable.
Step 5: Pour an appropriate amount of silicone oil according to the required hardness of the pad and stir evenly
The amount of silicone oil must be appropriate. The normal ratio of pad printing silicone and silicone oil is determined according to the customer's requirements. If the customer requires a large area of the printed pattern and needs to use a soft rubber head, add more silicone oil. On the contrary, if the hardness of the rubber head is required, no or less silicone oil is added. Generally, the hardness of the pad printing rubber head is15A~-25A° . If the amount of silicone oil added is too large, the rubber head is too soft, and the number of printing times is limited. Yes, no matter how good the quality of silica gel is, its molecular weight will be destroyed by silicone oil, resulting in the phenomenon of wear resistance, solvent resistance and aging.
Step 6:Pour the curing agent in the ratio of 100:2 and stir well
The ratio can not be wrong, otherwise there will be uneven curing, and even the mold will be directly scrapped when the mixing is not uniform.
Step 7: Pour one-third of the silicone into the mold, and vacuum all the glue.
The pad printing paste for making silicone moldsmust be vacuumed to remove air bubbles.
Step 8: Pour the rest of the glue into the mold
The ninth step: wait for8-10 minutes, cover the board when the glue is about to cross-link
Step 10:After 4-6 hours, it can be demolded, and it can be used after 8 hours.
After demolding, you can use scissors to trim the excess silicone around the pad printing head, and it can be put into production in8 hours.
The pad printing headis made of pad printing silicone, which can be used in many fields: plastic toys, electroplating products, electronic toys, trademarks, communication equipment, craft gifts stationery and other irregular pattern printing. Are you excited? Then make your own pad printing pad, you can too!
