SU1211064A1 - Multiple injection mould for making annular rubber articles - Google Patents

Description

2. A mold according to claim 1, about tl, which is that the forming cavities of the existing shape of the lean elements are made with a round section, and the additional ones with a rectangular section with rounded tops

The invention relates to the manufacture of rubber technical products and is intended for the manufacture of annular rubber products of circular cross section and rectangular with rounded tops.

The aim of the invention is to increase the removal of rubber products per unit area of plates.

Figure 1 shows the proposed mold, a vertical section; na.fig.2 - the same, slightly open position; fig.Z - bottom plate mold press, top view; figure 4 - section aa on fig.Z (the closed position of the mold); on fig.Z - section bb in figure 3.

A multi-part mold for preparing annular rubber products comprises lower 1 and upper 2 plates and guide columns (not shown). Plates 1 and 2 have shaping elements in the form of interacting conical projections d and depressions b with annular grooves C. On each slab between adjacent existing shaping elements, additional shaping elements are made, the large bases of which are located in the same plane B-B with the bases of the available shaping elements.

On the plate 1 with the main shaping elements in the form of conical protrusions and additional shaping elements are made in the form of conical cavities d. On the plate 2 with the main shaping elements in the form of conical depressions b, the additional shaping elements are made in the form of conic protrusions C. Forming of the depressions b and projections e at the points con

us, whereby the forming main and additional shaping elements pass through the center of the section of the cavity of the existing element and the center of the closest one to the non-rounding of the section of the cavity of the additional forming element.

2

The large base strokes are a continuation of the core forming elements. On each plate, the large bases of the main and additional shaping elements are located in contact with each other (Fig. 3). On the additional forming elements there are annular grooves f. The annular grooves with and f in the closed position of the mold form a forming cavity with outer diameters DH and DH-SF.). The shaping cavities of the main shaping elements are made with a round section of radius R, and the shaping cavities of additional shaping elements are made with a straight section section with rounded peaks along the radius R ;,.

Forming the main and additional shaping elements on each plate passes through the center O of the cross section of the cavity of the existing element and the center 0. | nearest rounding of the cavity section of the additional element. The interdental distance of two adjacent forming elements is equal to half the sum of the outer diameters of the BC and DH I1 "of the forming cavities lying on them,

Press form works as follows.

In the grooves with and -f of the bottom plate 1, rubber blanks are laid. Then, the top plate 2 is mounted on the plate along the guide columns. The assembled mold is placed in a press for vulcanization. When closing the press top 2 and lower-. The plates 1 are closed along the planes B-B. After molding and vulcanization3

press, the mold is unloaded from it and fed to Perezard, where it is cleared,

and the finished products are removed from the groove. The mold is cleaned. Then the cycle repeats.

Claims (2)

1. MULTI-LOCAL PRESS FORM OF THE DAY OF PRODUCTION OF RING RUBBER PRODUCTS, containing guide columns and upper and lower plates with forming elements in the form of interacting conical protrusions and depressions with annular grooves that form forming cavities in closed position, with the aim that - Fig.} Removal of rubber products from a unit area of plates, on each plate between adjacent existing forming elements, additional forming elements are made, the large bases of which are located in the same plane as the bases of existing forming elements in contact with them, and the center-to-center distance of two adjacent forming elements is made equal to half the sum of the outer diameters of the molding cavities present on them, and additional shaping ele- copies in the form of conical hollows, and on the plate with hollows - in the form of conical protrusions, the generators of which at the contact points of large bases are a continuation of the generators of the main forming elements. SU „1211064 2. A mold according to claim 1, characterized in that the forming cavities of the existing forming elements are made with a circular cross section, and the additional ones with a rectangular section with rounded vertices, and the generatrix of the main and additional forming elements passes through the center section of the cavity of the existing element and the center of the nearest to it the rounding of the cross section of the cavity of the additional forming element.