Molded rubber products during curing. Excess glue along the parting surface outflow, formed plastic edge different thicknesses. To make products comply with the provisions of the size and appearance of quality assurance, after vulcanization of the finished product subject to trimming processing, using endless mold pressing product, also with a small amount of glue edge products in O-rings, these plastic edge It is superfluous, called the trimming process.
 

       The method of trimming molded rubber O-ring according to the operation mode can be divided into two categories: manual and mechanical trimming trimming.
 

       Manual trimming is the most traditional method of trimming, the basic mode of operation is the tool to remove the plastic edge. Manual trimming small investment, trimming quality is not high, low efficiency, only suitable for processing small quantities of products.
 

       Mechanical trimming, there are two methods, one after the vulcanization of the O-ring over the inner diameter to match sandbars or nylon rods, driven by the motor rotation, use sandpaper or a cylindrical grinding wheel by means of both relative operating rubbed bore or cylindrical plastic edges. This method is relatively simple, easy to use and more efficient than manual trimming high, especially for the small size, larger quantities of products. But this system by trimming the grinding wheel, less precision trimming, grinding rough surface.
 

       Another method is frozen to the side. Currently, frozen trimming methods are trimming drum freezer, frozen trimming vibration, wobble or shake frozen trimming, brushing and shot blasting freezing frozen trimming trimming five forms.
 

       Rubber under certain low temperature conditions gradually from a high elastic state into a glassy state, the rubber becomes hard and brittle glassy, ??brittle hardening speed and the thickness of rubber products concerned. When the rubber O-ring to release the frozen trimming machine, thin burr frozen at a certain low temperature products, hard and brittle, and the product itself is still maintain a certain flexibility, as between the drum operation. Products collision, products and blasting abrasive like an impact, abrasion, plastic edge was broken off, so as to achieve the purpose of trimming. Completion edge products at room temperature is gradually raised to restore elasticity.
 

       High and low temperature trimming production efficiency, good economic returns. According to the information, repair small side drum means investment, low cost, but the products of poor inner side effects go, while blasting repair quality edge trimming device weight is ideal.