SU1430280A1 - Method and injection mould for making hollow articles from mouldable powders - Google Patents

Abstract

The invention relates to the production of hollow articles from press powders. The purpose of the invention is to improve the quality of products. The method of making hollow articles from press powders involves filling the press powder into the matrix 5, pressing the product to form the voids through the upper 2 and lower 4 vacuum holders, and then pushing the products out of the matrix 5. The molding of the voids is carried out first by introducing the lower vacuum holders 4 when the dressing powder is filled into the matrix and the subsequent introduction of the upper void formers 2 into the matrix with simultaneous removal of the lower void formers from it 4. The mold is made for and hollow products LH contains a matrix 5, the upper 1 and lower 3 punches, on which the upper 2 and lower 4 hollow cores are fixed coaxially. The upper void formers 2 are made of resilient material, and the lower punch 3 is provided with limiters 15 for displacing void formers 4, equipped with straps 16 with elastic clamps 17 and variable diameter pins 18 installed in them. 1 hp f-ly, 10 ill. G7 fi5.7

Description

The invention relates to the production of hollow articles from press powders and can be used in the manufacture of hollow ceramic and silicate bricks, as well as hollow block products from silicate dispersions and various bone products such as containers, rings and sleeves,

The purpose of the invention is to improve the quality of products.

Fig. 1 shows the initial stage of filling the press powder into the matrix} in Fig. 2 — an oxidative stage of filling; in FIG. 3, the initial stage of double-sided pressing; 4 is the final stage of pressing J in FIG. 3 — the removal of the lower void-forming elements from the matrix; in fig. 6 - ejection of products from the matrix, in FIG. 7 - the proposed mold, general view, section (the final stage of filling the press powder into the matrix); Fig. 8 - the same, at the end of the pressing process; in fig. 9 - the same when pushing products from the matrix; in fig. 10 — node 1 in FIG. 7

PRI im p The fabrication of a thickened wall brick with seven impermeable voids and holes in the lintel (brick hollowness 35%).

First, the upper punch 1 in the assembly with the emptying formers 2 is retracted to the extreme upper position, and the lower punch 3 with the floating emptying formers 4 placed in it is flush with the surface of the die 5. Then the carriage 6 with the press powder 7 is fed and lowered

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the mold is closed by the upper punch 1, a two-sided pressing of the product takes place. During the latter, the extrusion of the voids of the formers 4 from the cavity of the matraces continues. into the lower punch 3 with simultaneous movement of the forming jumper 9 to the punch 3 and compaction of the pre-powder. The emptying holders 4 are lowered to the lowest position. In this case, the surface of their upper ends flush with the surface of the lower punch, takes part in the extrusion of the product. In this position, the extrusion of the product is completed with the simultaneous formation of non-through voids 10 with openings 11 in the web 9. At the end of the compression, the upper punch is removed from the matrix and the elastic void bodies 2 are removed from the formed voids 10. The lower punch 3 the product 12 is pushed out of the matrix 5, after which the carriage 6 pushes it onto the conveyor 13 and returns to its original position.

The mold for the manufacture of empty articles from press powders comprises an upper punch 1 from the voids of the formers 2, a lower punch 3 with the cores of the 4, and a die 5. The upper 2 and lower 4 voids are located coaxially and can move in a vertical plane . At the same time, the upper hollow holders 2 are made of elastic material and have a cross section identical to that of the lower hollowing agents 4 The latter can be made in the

punch 3 together with a hollow core hollow core or textolite and

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five

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the mold is closed by the upper side. Sleep 1, a two-sided pressing of the product takes place. In the course of the latter, the removal of hollow cores 4 from the cavity of the matraces continues. 5 to the lower punch 3 with simultaneous movement of the forming jumper 9 to the punch 3 and compaction of the press powder. The void forming units 4 are lowered to the lowest position. In this case, the surface of their upper ends, which is flush with the surface of the lower punch, takes part in the extrusion of the product. In this position, the extrusion of the product is completed with the simultaneous formation of non-through voids 10 with holes 11 in the lintel 9. After the extrusion is finished, the upper punch is removed from the die and the elastic void 2 is removed from the molded voids 10. The lower punch 3 the product 12 is pushed out of the matrix 5, after which the carriage 6 pushes it onto the conveyor 13 and returns to its original position.

A mold for the manufacture of hollow articles from press powders contains an upper punch 1 with a core 2, a lower punch 3 with a core 4, and a die 5. The top 2 and bottom 4 core are coaxially and can move in a vertical plane. In this case, the upper void formers. 2 are made of an elastic material and have a cross section identical to the section of the lower abutment formers 4. The latter can be made in a hollow core or from a textolite and

With the help of paddlers 4, the press was filled with a porypah from the carriage 6 into the cavity of the matrix-5). 5. The emptying formers 4 are installed at a predetermined height, and the punch 3 continues to be lowered to the lowest position. Thus, the press powder is filled into the matrix with its simultaneous distribution in the space between the holders 4. Carriage 6 removes excess press powder and starts to lower the upper punch 1. At the same time, the upper Holders, which are equipped with additional protrusions 8, form through press powder jumper 9 products begin to embed Emptying 4 in the lower punch 3. After

mounted to move through the cavity of the die 5 through the holes 14 in the lower punch 3. The punch 3 is provided with stops 15,

a void formers. 4 - by an earring 16 with elastic clips 17. Adjusting studs 18 of variable diameter, rigidly connected to the matrix 5, are installed in the clips.

The mold works in the following AM way.

In the process of filling the press powder into the matrix 5, the emptying formers 4 are lowered until the earring

16 with elastic for the;; the screws 17 will not reach the shoulder of the stud 18 when moving to its thickened part. In this case, the Void 4 stops and the punch 3, together with the limiter 15, continues to descend to its lowest position. When the backfill process is over and the pressing process starts under pressure of the upper void formers 4 on the void 4, the elastic clamps 17 in the stud 16 are compressed and the ear moves over the thickened part the adjusting stud 18. At the same time, the formers 4 begins to sink in the punch 3. The stopper 15 gradually returns to its original position and transmits the force of the lower punch to the and dvz extrusion extrusion product. When the product 12 is pushed out by the punch 3, the stud 16 returns to its original position. The thickness of the web in the extruded product is controlled by a pin 18.

Claims (2)

1. A method of making hollow articles from press powders, comprising filling the press powder into a matrix, pressing the product to form voids in it by means of upper and lower these holders and subsequent pushing of products from the matrix, characterized in that, in order to improve the quality of the products, the voids are molded by first introducing the lower void formers into the matrix by filling the press powder into it and then introducing the upper void formers into the matrix simultaneous removal from it of the lower void forming. 2. A mold for the manufacture of hollow articles from press powders, including the matrix, the upper and lower punches, on which the upper and lower vertically flexible top and bottom movable in a vertical plane are fixed, characterized in that, in order to improve the quality of the products, the upper blank members are made of an elastic material, and the lower puncheon is equipped with movement restrictions lower hollow cores, which are provided with earrings with elastic clips and variable diameter diameter pins fixed in them, rigidly connected to the die. and  6 / / / / X (rig. (rig .. 4 J L re (rig 9 IS Phage