The procedures are as follows: wipemould And spray release agent - placed semi-finished products (seal and gasket) - Flip mold - rack drive will give mold vulcanizing chamber - vacuum vulcanizing mould will be sent to the rack drive bracket, flip - Top - opening mould product.
It is understood that the two rubber oil seal mould manufacturing. Two oil seal mould manufacturing using single component processing, assembled match, excellent processing technology, mold convenient detection. Single cavity mold material selection of CrlZ, with 45 steel plate. Mold machining process, in strict accordance with the mold drawings, ensure the cavity size, the following points are the key to ensure the accuracy of the mold processing:
(L) processing flow: glue groove processing quality of past oil seal mould rubber flow trough has not been fully appreciated, often made from rubber flow trough cavity too far or size is not easy to control, the products of pruning difficulties, product appearance. Two oil seal mould to solve these problems has been improved, the inner end of the Triangle rubber flow groove size and diameter at the same size products (zero to zero), the use of the upper and lower die forming sharp edge to seal molding, excess flash is cut, which can simplify the trimming process, and improve the appearance of the product quality. The plastic flow slot and cavity diameter respectively in different modules, the size does not interfere, the precision is easy to guarantee.
(2) on the 1 with the core die and the upper die and the upper mold core processing: 1 with taper fitting, the method of research with the requirements, contact rate reached more than 80%. The processing of the traditional method is not only difficult, but also spend a lot of time, is still difficult to achieve the desired effect without any flash. The new structure of the mold processing by the tilt angle of taper hole is smaller than the tilt angle of the cone axis to make the mold and the mold parting surface in B always tightly together, with no gap in the state, so here there is no flash products. And the mold manufacturing process improvement.
(3) on the 1 and 2 core mould pressing: 1 and 2 of the core mould pressing is the key to ensure the size and accuracy of the accessory lip of the oil seal. Three open the flash at the side lip oil seal mould, greatly influence the appearance quality of secondary lip at. The new structure will die on 1 and 2 on the core core by interference fit, monomer after processing, pressed together by thermal expansion method, and then by the fastening screws on the upper end of the upper punch 2 tightly pulled, effectively prevent the side two core loose lip.
(4) the connection between each cavity: connecting the single cavity mold and the connecting plate must have a certain amount of floating, to ensure that the mould is flexible and accurate. With the gap between the single plate control in 0. 50 a 1. 0rnm. The gap is too large to cause mold when using partial rotary shaft oil seal structure die design cable is too large, the die wear intensifies, affect the service life of the die; the gap is too small to die when the cavity interference occurs between the card had died.
The development of die two rotary shaft oil seal has changed the traditional three mold structure, the oil seal products appearance and performance guarantee, greatly improving the work efficiency. Development of the new structure of the mold success promotion significance for domestic oil seal enterprise.