LV10937B - Casting mould for manufacturing tubular products - Google Patents

Abstract

This invention refers to the units for the formation of plastic articles, namely, of long pipe-type articles with complex configuration and cavities production.The invention allows simplifying the mould construction, diversifying articles nomenclature and increased labour productivity. It consists of the following: the casting mould (Fig.1) is complemented with the casting stamping punch (13), which is placed in the movable half-mould (2) and is displaced against the output plane, besides this, an additional formation male mold's end (14) forms an angle against the mould output plane, which is equal to the one between immovable half-mould (1) and slant (15).<IMAGE>

Description

LV 10937

Casting mold for the manufacture of tubular articles

The invention relates to a device for the manufacture of articles made of plastics, that is to say casting molds for making tubular articles with external holes.

There is a known casting mold comprising a movable and stationary half-shaped and movable half-pivoted lever coupled to a insert forming a cam. The form is equipped with fingers, which are placed in a stationary semicircle with ball-bearings, while fins are formed on the lever, interacting with the fingers and the assembly plate, perpendicular to the production axis / 1 /.

However, in a known form, such a assembly plane can only be used to form short-length products with bumps, but machines with very large opening strokes and a larger, if necessary, injection capacity are used to make long tubular products with bumps.

The closest to the invention by its technical nature and the result achieved is the casting mold for the manufacture of tubular articles, containing moving and stationary semicircles, positioned axially in the form-assembling plane of the forming sign, connected by means of a lever system with semicircles / 2 /.

However, in the known casting form, it is possible to make long catiral products with only internal holes, but it is not possible to make them with external holes, as the axis of the mark forming the cavity coincides with the punch.

Object of the Invention q.s - making long tubular articles with holes in their outer surface. The targets are achieved so that the casting mold for making a tubular article containing moving and stationary half shapes, placed in the longitudinal axis of the form-forming plane (punch), is equipped with an additional shaping mark -2, which is movable in the moving semi-shape moving in relation to its semi-mold assembly. a plane in which the tip of the additional shaping mark is disposed below the angle relative to the assembly plane equal to the angle of chamfer executed on the mutually cooperating rigid half-shapes.

Fig. 1 shows a longitudinal section of a casting mold, FIG. 2 - FIG. Shape A-A of Shape I Shown.

The mold consists of fixed I and moving 2 half shapes. In the form-folding plane, the longitudinal longitudinal shaping mark 3 is provided to provide a central hole in the article. The semi-molds I, 2 and the shaping mark 3 are connected to each other by a lever system comprising long arms 4 and 5. The upper ends of the long arms 4 are pivotally connected to the sliding plate 6, and the lower ones are half-shaped. Upper short lever 5 joints pivotally connected to long levers 4, and lower ones with forming plate 3 plate 7. Upper end of rod 8 firmly attached to the top plate 6 of push rod 9 · Fixed half 10, centering pins II and mark 12 to make a side hole in the article. In the moving half-form 2, an additional shaping sign 13 with an end 14 is disposed in relation to it in the form-forming plane, positioned below the angle of the form-assembly plane equal to the angle of finishing of 15. The mystery is executed on the stationary semi-form I, which interacts with the rear. The sign 13 is mounted on columns 16 placed under a narrow angle with respect to the form-assembly plane and tensioned with springs 17 ·

The casting form works as follows.

The plastic passes through the mold insert 10 into the forming material. After the material has been pressurized under pressure and the cooling form is opened. When the mold is opened, the movable half-form 2 leaves the rigid semicircle I, pulling the ends of the long levers 4, at which the end plate 6 is lowered, which, in turn, moves down from the rod 8 by means of the rod 8, pulling the sign 3 from the article 18 Sign I5 &gt; which forms the outer cavity is automatically ejected from the cavity when moving the moving half-form 2. -3- EN 10937

Due to the fact that the inclination angle of the solid half-round sanding 15 is equal to the angle below which the end 14 is placed, the signs 15 are slower in the direction of the guide assembly than the movement of the moving half-shape 2, thus, by moving the moving half-face, the sign is automatically ejected from the cavity simultaneously with a moving half-carriage, whereby the rate of its removal is determined by the size of the angle of grinding.

Introducing the proposed construction in the production allows for the production of long tubular products with an external hollow if there are other holes or holes on the perimeter of the article.

Sources of Information 1. Abtopcko® CBK £ eT6jHj ctbo CCCP Jfc 647125 »o. B29C 5/00 * 1977 2. ABTopeKoe ΡΒΗΛβτθΒΒΟΤΒο GCCP% 534364.0. B29C 5 ^ 00 * 1975 (πρΟΤΟΤΗΠ)

Claims (1)

Injection mold for the manufacture of tubular articles comprising a movable and stationary semi-shaped, shaping mark (punch) disposed in the longitudinal direction of the axis of the form-assembly plane and connected by means of levers to the semi-molds, is distinguished by the fact that for the production of exterior cavities it additionally comprises a shaping mark disposed in a moving part of the semicircle and movable in relation to it in the half-form assembly plane, furthermore, the tip of the additional shaping mark is positioned at an angle to the assembly plane equal to the angle of chamfer of the stationary semi-interacting with the end. .