SU1256979A1 - Mould for casting polymeric products - Google Patents

Description

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This invention relates to a process tooling for processing polymers.

The aim of the invention is to increase the reliability of the form and increase it. nesting.

 The drawing shows the form in closed and open positions.

The form contains a casting plate, a movable mold with a base 1, a decorating plate 2 and a two-stage ejector system 3, including a central pusher, secured in the plate 4 of the final ejection and made in the form of a sleeve 5 with the supporting part with a radial underflow of 7 dl placing the balls 8, the pre-ejection plate 9 with the additional sleeve 10 with the element for injection with balls made of radial holes 11. The additional sleeve 10 itself is located in the central part in the sleeve 5, a copy element for lateral movement of the balls 8, made in the form of a central sleeve 12, which is made up in the decoration plate 2, with a hole under the ejector 13 of the sprue. The central bushing 12 is arranged in the additional bushing 10, and its copier surface is made with an annular groove 14,

Punches 15 are fixed in the pre-ejection plate j ejectors 1 b of products and counter pushers 17 in the plate 4 of the final ejection, and the ejector 13 of the sprue - B of the bearing part 6 of the sleeve 5,

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In the base 1, the supporting fingers 18 and 19, respectively, are installed for the plates of the preliminary and final ejection.

Such a constructive solution makes it possible to prevent the balls from jamming with a copier element in the event of premature movement of the pre-ejection plate (for example, due to the friction between the counter-pushers and the product pushing the product). In addition, it is possible to increase the nesting shape, since the ejector mechanism design allows the ejector center to be installed.

The form works as follows.

After injection of the melt polsh-iepa and the technological extract, the mold is opened, while due to the interaction of the sleeve 5 with the stopper thermoplastic stove, the plate 4 of the final ejection and the plate 9 of the pre-extrusion stop.

As a result of this product, the punches 15 and the ejector 16 and the sprue by the ejector 13 of the sprue are removed from the decoration plate 2.

With further movement of the movable part of the shape, the balls 8 move along the copying element. After they fall into the annular groove 14 of the loosening} 1, the pre-ejection plate comes out, which begins to move together with the movable part of the mold, and the articles are finally removed by the ejector 16.

With cm-1-5: and the forms with counter-pushers, the preliminary and final ejection plates are returned to the original position.

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Claims (1)

CASTING FORM FOR PRODUCTS-. POLYMER PRODUCTS FILLING, containing a movable half-mold with a base, a forming plate and a two-stage ejection system, including a central pusher, fixed in the final ejector plate and made in the form of a sleeve with a support part and radial inside for placing balls, a preliminary ejection plate with an additional sleeve with an element for interacting with balls, and a copy element for lateral movement of balls, characterized in that, in order to increase the reliability of the form and increase its nesting, the additional sleeve is placed in the central pusher, its element for interacting with the balls is made in the form of radial holes, and the copier element for the lateral movement of the balls is made in the form of a central sleeve fixed to the forming plate with an opening for the gate ejector, and the central sleeve is located in additional, and its copy surface is made with an annular groove. ΪΟ sl s © m s ©