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1. Paint carved lacquer
The principle of laser processing technology is to project the laser beam onto the material, and use the interaction between the laser and the material to dissolve, cut, and weld the material to change the surface characteristics of the object.
When coating silica gel products, there are three main mixing methods: direct mixing, mixing and point mixing.
. Direct rubber method
When the product is solid, the height is less than 1.5mm, the drawing inclination of the product is more than 1.5 degrees, and the product is not allowed to be injected in other ways, the mold adopts the direct injection method. The direct rubber filling width is usually 2.50~3.00mm, the specific rubber filling width depends on the size of the product, but the rubber filling thickness is usually 0.30~0.35mm, and in order to easy blanking, set in the linear position of 0.35~0.50mm, and the product frame
When the silicone button product is hollow, the height is small 1.8mm, and the product drawing inclination is above 1.5 degrees, the mold adopts the direct injection method, the direct injection width is generally 2.50-3.00mm, and the injection thickness is generally 0.30-0.40mm. The specific rubber filling width varies according to the size of the product, up to a straight position of 0.30mm, to avoid the product sticking together
Advantages: The mold processing is convenient, injection molding production is conducive to product injection molding.
Disadvantages: After the silicone button product is painted, the silicone button may leak light due to the gap left by the stamping water. In addition, if the burr caused by poor incision treatment during blanking is too large, it will affect the overall touch of the product after assembly. Therefore, the silicone keys are rarely installed directly with rubber.
.Bottom fill mode
If the silicon key product is solid, the thickness is above 1.8mm, and the drawing inclination is above 1.5 degrees, the silicon key product can be glued before and after the mold. When gluing can be done by other methods, the mold is filled at the bottom. The bottom filling is generally 0.30~0.00. In and out of the rubber position must avoid the empty rubber pouring bottom length is generally 0.25~0.30mm, and the direction of the column foot on the product frame is opposite to the product surface.
Advantages: The advantage of the bottom filling method is that it is conducive to the extrusion of the mold and the blanking of the product, and the nozzle burr generated after the blanking of the product does not affect the assembly of the product and the feel of the finished product, and the product will not leak light after painting. Disadvantages: Due to the relationship between the length of silicone rubber primer, it affects the bonding speed of the product.
Point-feed system
Point feeding means that rubber is placed directly on the product. The point-feed method is rarely used for the main silicon buckle products, and the most commonly used is rubber products or hybrids. In particular, it is widely used in PC TPU two-color molds, and the glue removal boss is generally made in the dispensing feed of the product. This is to prevent rubber burrs from affecting the assembly of the product and the touch of the finished product when the gum is dropped. The height of the rubber sleeve is generally 0.3~0.5mm. Note: The rubber sleeve is generally curved and square.
Advantages: The advantage of the point supply method is that after the button product is injected, there is no need to pull the water nozzle or subsequent processing.
Disadvantages: The dispensing method may have product shadows during injection molding on the surface of the corresponding silicone rubber products, especially buttons with wrinkles on the surface, and the pattern of the rubber strip is difficult to control during injection molding, which is generally not the specified requirements of the customer. Otherwise, Australian silicon product manufacturers would not actively adopt the direct dispensing method.
2. Printing on the back
For button products whose processing technology is printed on the back, there is only one gluing method, that is, direct gluing method.
Establish the position of the rubber wave at the rubber entry point of the front mold. The rubber penetration depth is usually 0.5mm. This is to avoid damage to the screen by burrs entering the rubber mouth during printing. The position of the rubber wave can be curved or square. The silicon button printed on the back, the drawing inclination is usually more than 1.5 degrees, the sizing width is usually 2.5~3.5mm, and the desizing width is usually 2~2.5mm. The position of glue in and out is generally 0.~0.5mm straight extension, easy to punch, the thickness of glue in and out is generally 0.3~0.4mm, the specific value should be determined according to the size and height of peony products; In addition, the orientation of the foot column on the frame needs to be consistent with the surface direction of the key product.
Step 3: Electroplating
Electroplating is the process of electroplating a thin layer of other metals or alloys on the surface of a metal using the principle of electrolysis. It is the process of using electrolysis to attach a metal film on the surface of metal or other materials, and the oxidation of metals, such as rust prevention, wear resistance, electrical conductivity, light reflection and corrosion resistance
For silicon button products whose processing technology is electroplating, the sizing method is generally direct sizing method and bottom filling method.
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