Rubber products trimming method is introduced in detail

Rubber products in the production process, due to mold design, vulcanization process and material characteristics and other factors, often produce a rough edge or flash on the edge of the product. These raw edges not only affect the appearance quality of the product, but also may affect its performance and tightness. Therefore, the trimming process of rubber products is particularly important. This article will introduce several common rubber products trimming methods in detail to help readers understand and choose the appropriate trimming process.

1. Manual trimming

Manual trimming is the most traditional way of trimming, mainly relying on the manual skills of the operator and tools, such as punches, scissors, scrapers, etc., to remove the raw edge on the product. The advantage of this method is that the equipment investment is less, the flexibility is high, and the products can be processed with various complex shapes. However, its disadvantages are also very obvious: high labor intensity, low efficiency, low pass rate, and the quality of trimming is greatly affected by the technical level of the operator, and it is easy to appear problems such as scratches, scratches and deformation.

2. Mechanical trimming

Mechanical trimming is the use of special mechanical equipment for trimming, mainly including punching, grinding wheel and round knife trimming methods. This trimming method is suitable for rubber products with low precision requirements, such as some seals, gaskets and so on. The advantages of mechanical trimming are high efficiency, low cost, and can maintain a high quality consistency. However, for products with higher precision requirements, mechanical trimming may cause anomalies, such as uneven cutting edges, side depressions and other problems.

Punching and trimming: The use of pressure machinery and punching die, punching knife and other equipment to punch the product to remove the burr edge. This method is suitable for the product and its rubber edge can be placed on the die or punch bottom plate of the model product.

Edge grinding with grinding wheel: The edge of the product is ground with grinding wheel to remove the burr edge. The precision of grinding wheel edge is low, the surface is rough, and it is suitable for products with low precision requirements.

Round knife trimming: Use a round knife to trim the edge of the product, suitable for some special shape products.

3. Freeze and trim edges

Frozen trimming is a new trimming method, the principle is to use liquid nitrogen and other refrigerants to embrittle the raw edge of rubber products at low temperatures, and then through specific frozen particles (such as metal or plastic pellets) to hit the embrittle raw edge, so that it quickly falls off. Frozen trimming has the advantages of high production efficiency, low labor intensity, stable quality, and relatively low operating cost, especially suitable for pure rubber or other high-grade rubber products.

There are a variety of methods for freezing edging, including low temperature shot blasting, brush mold edging, drum edging, shaking edging, shaking edging, etc. These methods have their own characteristics, and rubber products manufacturers can choose the appropriate trimming process according to actual needs.

4. No flash mold forming method

In order to fundamentally reduce the generation of raw edges, rubber products manufacturers can also use the flange-free mold forming method. This method through reasonable design of mold structure and size, as well as the use of special mold materials and technology, so that the product in the vulcanization process is not easy to produce burring. No flash mold molding products, the glue edge is particularly thin, sometimes in the mold can be taken off or gently wiped off, thereby eliminating the subsequent trimming process, improve production efficiency and product quality.

Sum up

There are many kinds of trimming methods for rubber products, including manual trimming, mechanical trimming, freezing trimming and non-flash mold forming method. Each manufacturer should choose the appropriate trimming method according to the quality requirements of the product and its own production conditions. With the progress of science and technology and the continuous improvement of the process, the trimming process of rubber products will be more and more efficient, environmentally friendly and intelligent.