Rubber bellows model lamination manufacturing device and its manufacturing method

Abstract

Relating to a rubber bellows production device and a method of rubber bellows manufacturing with the production device, the invention provides a rubber bellows model lamination manufacturing device and its manufacturing method, and aims to solve problems of existing technologies. The technical scheme is that: the device comprises an upper die, a lower die, a middle die, and a core die, rubber sheets and spacer sheets sleeved on the core die excircle and arranged at intervals are disposed at a hollow part inside the middle die, and gaps are designed between the spacer sheets and the middle die and between the spacer sheets and the core die so that the rubber sheets can be conveniently bonded together interlacedly, thus forming the bellows. The device has greatly simplified structure and substantially reduced die height, thus being suitable for one-piece small scale production and also suitable for batch and mass production, i.e. applicable to soft and low hardness rubber product production and to hard and high hardness rubber product production.

Description

technical field [0001] The invention relates to a production equipment for rubber bellows and a method for making bellows by using the production equipment, in particular to an equipment and method for producing rubber bellows by laminating models. technical background [0002] Rubber bellows, also known as rubber diaphragm sleeves and rubber telescopic sleeves, are mainly and widely used for isolation and sealing of long shafts and long rods that reciprocate back and forth, such as new bellows-type valve stem seal valves; diaphragm sleeve-type rod pumping units wait. When installed and used, one end of the bellows is fixed at the stationary fixed end, and the other end is fixed at the movable end. With the reciprocating movement of the long axis or long rod, the bellows (diaphragm sleeve, telescopic sleeve) will be elongated or shortened. If there is no Other restrictions, the corrugation almost disappears at the longest time, and the corrugation folds together at the shor...

AI Technical Summary

Problems solved by technology

The disadvantage is: the model is complex, especially the core mold needs to be divided into several pieces, such as Image 6 As shown; the model manufacturing precision is high; the operation of loading and unloading the model is difficult, and a little carelessness may cause damage to the model; there are many parting lines and flashes generated by the parting line inside and outside the product, which is not easy to repair In addition, it also seriously affects the appearance; the more important disadvantage is: due to the existence of tolerances in the model manufacturing process and structural limitations, it is easy to cause uneven wall thickness of rubber bellows, such as Figure 8 Shown is the uneven wall thickness caused by the axial offset, such as Figure 9 It shows that the rigidity of the mandrel is not enough to cause the flexible deformation to cause the wall thickness to be uneven

The disadvantage is: since the adsorption force only comes from the pressure difference between the inside and outside of the rubber produced by vacuuming, compared with the model method, the pressure difference is very small. Therefore, during vacuum adsorption molding, on the one hand, the rubber should be soft. On the other hand, the thickness of the film should not be too thick. In this way, it will limit the production and manufacture of some corrugated pipes such as high hardness, high wear resistance and large wall thickness by vacuum adsorption method; , cannot effectively prevent the volatilization and overflow of some substances, resulting in low product density and poor compactness. Therefore, the products manufactured by this method cannot be used for sealing and isolating media and parts that require high sealing performance levels. If not It is used to seal the parts where flammable, explosive, toxic, corrosive and other high-risk fluid media may leak. The vacuum adsorption method requires a special vacuum device and additional vulcanization facilities

On the contrary, if this method is used to make the wall thickness very thick, the gain outweighs the gain, that is to say, it is not suitable for making thick products; it needs to use solvent; it can only be used for soft products, not for wear-resistant and high-hardness rubber bellows, and cannot be used for sealing and isolation sealing. For media and parts with high performance level requirements, if it cannot be used to seal parts where flammable, explosive, toxic, corrosive and other high-risk fluid media may leak, the production process and production facilities are different from general products

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