How does the silicone keypads produce?

How does the silicone keypads produce? silicone keypads manufacturers in the silicone industry are aware of the importance of the production process. Only a reasonable production process, excellent production technology to protect the production efficiency of products, improve product output and pass rate.
silicone keypads
Wingene as a silicone keypads manufacturers to share with you the specific production process of silicone keypads:

1, raw materials: silicone keypads material is the production of silicone rubber compound, vulcanizing agent used in double “2.5, the color of the use of colored toner or silicone gelatin, release agent using KEP a 10 or zinc stearate.

2, the hardness of the formula with 4O% hardness of 70 degrees of raw materials and 60% hardness of 50 degrees of raw materials mixing, the product hardness (70 × 0.4) + (50 × 0.6) degrees = 58 degrees.

3, mold mold can be provided according to the customer’s keypads drawings or samples for processing, made of silicone keypads mold, try to confirm the structure and production process before mass production. Before the production of molds generally need to sandblasting mold surface treatment, if the surface of the silicone keypads surface requirements for the bright side is required to spray glass sand, the requirements for the mattress will need to wear corundum or mixed sand, if no demand can spray mixed sand.

4, preparation according to the quality of customer orders, specifications to determine the hardness of the compound and the background color, according to the formula in the open mill or mixer on the refining, according to the test model to develop the specifications of the film and the PE film Wrapped together; ready
for external release agent, conductive adhesive black particles and a variety of tools.

5, vulcanization molding vulcanization molding use of flat vulcanizing machine, according to the vulcanization machine functions are manual, automatic and vacuum models. Mold from the upper and lower layers of male and female models (special miscellaneous pieces also have three plate mold), the production up to open the parent model, the public model into the conductive adhesive black particles and sliced ​​weighing silicone material, if any demand, then in the master mold into the color key, ready after the mold for heating,pressurized vulcanization.

The main control parameters of vulcanization are temperature, pressure and vulcanization time. The typical operating conditions are: temperature 160 ℃ ± 10 ℃; pressure 15 ~ 20MPa; time 150 ~ 200S (depending on the height of the key, such as key type is shorter 30 ~ 40S can also be completed). After the completion of the vulcanization, the mold will be launched vulcanizing machine, carefully lift the mother mold, with a gun with the wind, slowly remove the silicone button from the mold can be.

6, the second vulcanization of semi-finished products can be determined according to customer requirements whether the second vulcanization to remove the residual product in the curing agent decomposition products to improve product performance. Conventional secondary vulcanization using vertical oven, with 180 ~ 200 ℃ temperature baking 2H can be completed.

7, silk screen, fuel injection, laser carved according to the customer requirements of the surface of the silicone keypads to the surface of the product for silk screen, fuel injection, laser carving process, to complete the deliveryinspection inspection.

a. silk screen, select the appropriate screen and ink for surface character silk screen, silk screen after the need to undergo inspection, unqualified solvent wipe off reprint, qualified to send baking.

b. fuel injection, according to customer requirements on the surface of the silicone keypads spray oil, extinction, PU and other ink, immediately after the spray to send baking, baking after the test, unqualified rework orscrapped, qualified to the next A process.

c. laser carving, according to the requirements of customers on the surface of the silicone keypads for laser treatment.

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