SU1435458A1 - Multiple die-casting mould for making annular rubber articles - Google Patents

Abstract

The invention relates to the manufacture of rubber products and is intended for the manufacture of ring products. The purpose of the invention is to reduce the consumption of rubber compound and improve the quality of products. For this, the mold is provided with an intermediate plate 2 with openings for the upper shaping elements 4. The elements 4 contain the centering elements 5 and protrude beyond the plane of the mold connector. The outer diameters of the forming elements 4 and the centering elements 5 correspond to the outer and inner diameters of the workpiece. Through holes for centering elements 7 are made in the lower forming elements 7. In the bottom plate 3 there are grooves 9 for the sliding pallets 10. When lifting the plate 2, blanks are cut down on the outer diameter by forming elements 4. When the plate 1 is lowered, the blanks 14 are cut down diameter and precise placement in the forming cavity. The remains of the 15 rubber compounds fall into the sliding pallets. 4 il. SS (L

Description

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The invention relates to the manufacture of rubber products and is not intended for the manufacture of ring shaped articles.

The purpose of the invention is to reduce the consumption of rubber compound and improve the quality of products.

FIG. 1 shows the proposed press mold in a closed state; in fig. 2 - the same, at the moment of loading the sheet from the rubber mixture; in fig. 3 - the same, at the time of cutting blanks from the rubber mixture on the outer diameter; in fig. 4 - the same, at the time of cutting the blanks from the rubber mixture on the inner diameter and the beginning of molding.

A multi-part mold for manufacturing rubber products contains upper 1, intermediate 2 and lower 3 plates, interacting with each other by means of guide columns and bushings (not shown). In the upper part of the plate 1, the formative elements 4 protruding beyond the plane of the mold and of the mold are installed with centering elements 5 located on the lower ends and forming nests for 6 s. squeezing edges.

In the bottom plate 3 there are installed shaping elements 7 with through holes 8 for centering elements and under the last grooves 9 in which sliding pallets 10 are installed. In the intermediate plate 2 there are through holes 11 (Fig. 2) corresponding in diameter to the outer diameter of the projecting parts of the upper forming elements 4.

Multiple mold works in the following ways.

In the top plate 1 is attached to the top plate of a vulcanization press (not shown). The intermediate plate 2 is attached to a press ejector (not shown) having the possibility of reciprocating movement. The bottom plate 3 is attached to the bottom plate of the press. The intermediate mold 2 of the mold is pushed onto the bottom plate 3 of the mold by means of the press pushers (Fig. 2), then the calendered rubber sheet 12 is placed on the slab 2, the thickness of which is equal to the thickness of the required preform. Then, using the pushers of the press, the intermediate plate 2 rises, while at the interaction of the outer diameter of the protruding parts of the forming elements 4 with the through holes 11, the cutting of the rubber mixture 13 on the outer diameter of the disk blanks 13 ( Fig. 3). Then, using the press pushers, the intermediate plate 2 is lowered onto the lower plate 3. A plate 12 with holes is removed from the plate 2. Then lower the upper plate 1 of the mold. In this case, cutting is performed according to the internal diameter of the ring blanks 14 of rubber

mixtures (Fig. 4) and their precise placement into the molding cavities. Residues 15 of the rubber mixture fall into the sliding pallets 10. Next, molding and curing are carried out. At the time of the start of vulcanization retractable pallets 10 are removed in the grooves 9 of the mold.

After vulcanization, the mold is opened, the finished products and the blister are removed. Then the cycle is repeated.

Multiple mold allows to reduce the consumption of rubber mixture and increase

product quality due to the precise placement of blanks in the forming nests.

Claims (1)

Invention Formula Multiple mold for the manufacture of annular rubber products, containing upper and lower plates and mold elements installed in them, characterized in that, in order to reduce the rubber mixture costs and improve the quality of the products, it is equipped with an intermediate plate with holes for the passage of upper mold elements and sliding pallets, and the upper shaping elements are made protruding beyond the plane of the connector. of the mold and are provided with guide elements located at their lower ends, with cm in the lower for.moobrazuyuschih elements provided with through holes for the centering elements, and the bottom plate by through holes formed grooves for positioning pallets. cpu.i y.J 10 9