In the die-cut parts that we produce and process, we often encounter the production and processing of silicone foam. Generally, the thickness is 1-2 mm, and the final thickness is likely to be 5 mm. For the production and processing of such foams, there will undoubtedly be many such problems in the manufacturing process. Then the key to the problems we often encounter is reflected in the following three points:

1. Circular arc is very easy to occur during the silicone foam punching machine (the circular arc of the round blade die-cutting is very large);

2. This thick foam plastic is very easy to cause slag and dust during the stamping die process;

3. For some porous structural goods, it is difficult to discharge the waste (the diameter is very small, the thickness of the foam plastic is large, and the waste cannot be discharged);

It is some of the common conditions we encounter in the actual operation of silicone foam. In the following, we will analyze the above three difficult problems and come up with corresponding solutions; Everyone will ensure this for everyone according to the characteristics of the foam itself. Simple details: silicone foam has high thickness, certain ductility and low ductility limit, which is very easy to cause smoke. Because of the characteristics described in silicone foam, the three basic problems mentioned earlier will arise during the die-cutting process of silicone foam.

Arc puzzle

First of all, the problem with regard to beveled edges that tend to occur during die-cutting and stamping dies is the thinness and thickness of the foam. During the stamping process, the foam is extruded and laser cut after the foam is extruded. Rounding, the key way to deal with this type of problem is to change the selection of special tools.

Generally, the special tool for shearing and pressing that we apply is a double-tilt angle cutting tool for the actual operation of the punching machine. Therefore, in order to better ensure the reasonable reduction of the inclination angle edge, we should use a flat knife to carry out stamping dies on the inside bevel and the outer inclination angle, which can reasonably reduce the cause of the inclination angle edge of foam.

In addition, in view of the relative simplicity of the structure of silicone foam die-cutting parts, we choose longitudinal section, trimming, and jump cutting methods to reduce the elements that harm the fillet corners, thereby preventing the problem of fillet corners. For some products with slightly complicated structure, we can use the knife thread dissolution method to open the hole, instead of turning off the knife wire and multi-segment coincidence, so as to reduce the extrusion ground stress during the foam opening process, thereby reducing the foam tilt problem.

Dirt and soot

Secondly, the problem of silica gel foam fragments and soot, the direct cause of which depends on the characteristics of the foam itself. Because foam has low ductility, the composition structure is foam raw material. In all the stamping process process, due to the repeated effect of the knife, the slag foam particles are easy to generate dust and float in the air.

There are many ways to deal with this challenge for some die-cutting tasks that must be cleaned up. A common method is a sprayer release agent. The common method of production line is to deal with this problem by combining OPP protective film on the surface of EVA foam. Naturally, such methods are likely to lead to the consumption of some auxiliary materials.

Waste resolution

Third, in solving the porous structure waste level, the most fundamental reason is that the foam is too thick and the diameter is small, so that the waste cannot be extracted during the solution process. The general traditional method is to make a set of mold ejector solution special tools outside the die cutting machine mold base, according to the mold ejector to discharge the skin pore waste, and carry out cold stamping and milling surface. However, this kind of waste disposal method is not very good, and it is very easy to lift the foam cotton, resulting in poor product quality. A common method on round blades is a specialized tool for obtaining and disposing of waste.

Workaround: Multithreading works

Fourth, the benefits of multi-threaded worker processes for superiors; As we all know, the top raw materials are driven by multiple threads, and the next layer of raw materials is cut by the same die-cutting to achieve the purpose of saving raw materials. Here, we choose a multi-threaded method to separate the silicone foam and the lining film to drive the raw materials, which not only saves the foam raw materials, but also during the operation process, the top raw material belt is taken away, and the foam frame is consumed. In addition, the arc is also cleared, because the effect of the working pressure, the arc will be greatly improved. Moreover, according to such practical methods, the basic smoke and dust problem has also been reasonably handled.

Only the use of high-quality round blade die cutting machine for manufacturing is not prone to related problems.


For silicone bubble noodles, please check the details:
https://www.siliconefoam.net/product-soft-cellular-silicone-iota-ht-870-.html