What is the reason the Cylindrical guide bush are easy to bite after disassembling the large mold Supplier China

The reason of the Cylindrical guide bush are easy to bite after disassembling the large mold.

The hoisting of larger-sized molds often needs to be carried out with a crane. In the production process, because of the need for mold repairs, it is often only necessary to disassemble the half of the mold. When the repair is completed and the half of the mold is hoisted and installed, the unilateral mold is often lifted It is too tight (after closing it with the other half), and the Cylindrical guide bush installer cannot detect it.

After that, due to the over-tightening of the unilateral hoisting, the friction between the guide post and the guide sleeve will become very large. After a long time, the two will have frictional seizure and the mold cannot be opened.

In addition, if the hoisting is too loose, the mold will be too heavy, which will increase the friction between the guide post and the guide sleeve, and cause frictional seizure between the guide post and the guide sleeve.

Therefore, it is reasonable to use the whole set of mold hoisting every time a large mold is hoisted. Even in a set mold, there will still be imbalances. Therefore, compared with a small mold, a large mold is more prone to friction and wear of the guide pin. Therefore, even if you are installing a complete set of molds, you must pay attention to the balance when lifting the moving and fixed molds. First, you must tighten the mold screws and check whether the guide post surface is well lubricated. Replenish grease in time to reduce friction. The phenomenon of wear.

Mold guide Cylindrical guide bush is a kind of mold accessory material commonly used in molds. There are many kinds of mold guide post and guide bushings. When we need mold guide post and guide bushing, how do we choose the mold guide post and guide bushing that suits us? Next, Hengtongxing mold accessories will teach you how to choose Mold guide pin guide sleeve.

The principle of choosing the matching accuracy of the Cylindrical guide bush is that the matching gap of the mold guide pin and guide sleeve should be less than the gap between the convex and concave molds, and how to choose the fit of the mold guide pin and guide sleeve under several conditions. Although these statements are correct, they are not accurate enough and difficult to choose in actual application.

First of all, it is necessary to ensure that qualified parts are punched out and the mold has a long life. The gap between the convex and concave molds should be within the maximum and minimum reasonable gaps during the punching process;

Secondly, in the blanking process, in addition to the matching clearance of the Cylindrical guide bush, which has an impact on the blanking gap, the side force during blanking, mold processing, assembly accuracy and other factors also affect the blanking gap. These factors have an impact on the blanking gap. Combining the effects, it should be ensured that the die gap is within a reasonable range of blanking gap.