SU1523389A1 - Mould for making threaded polymeric articles - Google Patents

Abstract

The invention relates to plastics processing technology, in particular to molds for the manufacture of polymer products with threads. The goal is to enable the manufacture of products with concentric side threaded holes. For this purpose, in a mold containing upper and lower half-molds, coxially mounted with the possibility of moving relative to each other threaded marks and mezanism from rotation. The latter is made in the form of a rod fixed in the upper half-form, on which a rack and pinion is mounted with a slot in the lower part, in which a spring-loaded retainer is installed with an opportunity to interact with the head of the rod to restrict movement of the rack. At the same time, the threaded marks are mounted horizontally in the bottom half-form, and the shank of the inner sign is spring-loaded relative to the outer sign in the direction of the shank of the latter, and the upper half-form is equipped with a fork for fixing the outer sign, on which the landing sections for the plug are made. 6 Il.

Description

The invention relates to a tooling for the processing of polymeric materials and can be used for the manufacture of products from these with coaxial side threaded holes.

The purpose of the invention is to enable the manufacture of products with concentric side threaded holes.

FIG. Figure 1 shows the mold in the closed state, vertical section; in fig. 2 - the same, in the open; in fig. 3 is a view A of FIG. one-; in fig. 4 is a view B in FIG. 2; in fig. 5 - interface of threaded characters in a closed mold; in fig. 6 shows the symbol interface nodes at the moment when the mark leaves the product.

The mold for the manufacture of polymeric articles with threads contains the upper half-form, the heating plate 1, the plunger holder 2 with the punch 3 and the sawed wedge 4, the holder 5 with the matrix 6 and

with threadblock 7, base 8 with ejector system 9, concentrically mounted thread marks — internal 10 with a smaller thread cutting pin and external П, the threaded part of which comes in connection with the thread copy 7 and has the same ujar as its sign portion, entering the product 12. The shank 13 of the sign 10 has a conical part, which is included in the corresponding bore of the external sign 11 and a faceted part, which, when fitted, fits into the hole.

The mold contains an upper half-form including a heating plate 1, a plunger holder 2 with a punch 3, a fork 4 for fixing the outer sign and a lower half-form including a holder 5 with a die 6 and a thread protector 7, a base 8 with an ejector system 9 coaxially horizontally mounted threaded marks - internal 10 with smaller pitch and

the next

with so

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with

The outer 11, the tail part 12 of which is included in the screwdriver 7. The shank 13 of the mark 10 has a conical part entering the bore of the outer sign 11 and a faceted part, the entrance w, which is fitted according to the fit, and its hole in the sign 11.

In the shank 13 of the mark 10, a ha 14 is fastened, which runs along the axis of the outer mark 11 through the hollow lead 15. The spring 15 is installed between the head of the pull rod 14 and the bottom of the driving rod 15. The vedush rod 15 has a faceted form outside (for example, shes. Tiger) and with one end enters the corresponding recess of the outer sign 11, and the second into the faceted hole of the neck 17 of the screw turning mechanism 18.

The mechanism 18 of the rotation of the threaded characters is made in the form of a rack-and-pinion multiplier, the gear rack 19 of which has 20 and fixed in the heating plate 1. The head 21 ti gi is placed in a slot in the lower part of the rail 19, its end is removed from the bottom of the groove at a distance a. A cam lock 23 with a spring 24 is also installed on the axis 22. The lock 23 is intended to limit the movement of the toothed rack. A support bracket 25 is attached to the housing of the mechanism 18 for rotation of the threaded marks, the lower section of which in a closed mold is above the lower end of the rail 19 for a distance equal to the travel of the plug 4. The latter are made on the outer sign 11 on the landing strips.

The mold works as follows.

A weigher of the press material is placed in the matrix 6, after which the heating plate is lowered. T he 20 passes a gap a between the head 21 and the cam lock 23 and rests against the end of the head 21 on the cam lock 23. Since at this moment the cam lock 23 contacts its face with the support bracket 25, it does not turn, and the closing force It is transmitted to the rail 19, which, through the gears of the mechanism 18, begins to rotate the bristle 17. The gear 17 rotates through the driving rod 15 the threaded marks 10 and 11, which, rotating, perform translational motion and enter the design cavity. When the cam latch 23 approaches the lower section of the support bracket 25, its face loses support, and the cam latch 23 rotates under the influence of thrust, pulling the rod down. In this case, the rail 19 stops moving, the signs no longer rotate and enter the cavity. By further lowering the plate I of heating, the fork 4 interacts with the seating portions of the external sign 11, and the punch 3 presses the material. By the end of the press run

Q 5

n 5

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(not shown) nyaHCOtt 3 fully compresses the material, and the fork 4 is completely “with the details on the outer sign 11. After the process time, the mold is opened.

In addition, the heating plate 1 carries away the t 20. The head 21 t gi 20 rises up and comes into contact with the radius surface of the cam latch 23. The cam latch 23 rotates around the axis 22 and passes the head 21 t g 20. 20. Under the influence of the spring 24 the locking mechanism returns to its original position. The head 21 ti gi 20 passes the distance a and rests on the bottom of the groove of the rail 19. At this point, the plug 4 releases the outer sign 11, then the rail 19 actuates the sign rotation mechanism 18. The gear 17 rotates the driving rod 15, and it is the external sign 11 together with the sign 10. Since the cutting step of the sign part of the sign 11 has the same schag as the threaded part entering the connection with the thread-copy 7, then for each revolution the sign 11 out of the product by the size of the thread schaga, and the sign 10 is lagging behind by the value of the difference in the cutting steps of its own and the external sign. In addition, it may lag behind due to the delay in the body of the product of its smooth styling part. Due to the lag of the mark 10 from the mark II, a gap is formed between the conical bore of the mark 11 and the conical part of the shank 13 of the mark 10, and the spring 16 is compressed between the head of the rod 14 and the bottom of the recess of the driving rod 15. B. The moment the mark 10 ends to exit from the item 12 unclamping and attaching through sign 14 to sign O about an axial movement in the direction of sign 11, due to this, the conical part of the shank 13 of sign 10 fits into the conical bore of sign P.

A press ejector (not shown) is then turned on and the product is removed. After blasting and lubricating the matrix, the cycle is repeated.

Claims (1)

Invention Formula A mold for the manufacture of polymer articles with threads, comprising upper and lower half-molds, coaxially mounted for movement relative to each other threaded marks and a mechanism for rotating threaded marks, characterized in that, in order to enable the manufacture of items with concentric side-tapped holes The mechanism of rotation of the threaded characters is designed as a rod fixed in the upper half-form, on which a rack and pinion is mounted with a slot in the lower part, in which it is installed with the possibility of interaction with the head of the gi spring-loaded cam lock to limit the movement of the toothed rack, This threaded marks are installed horizontally in the lower half of the form, and the shank of the inner sign is spring-loaded relative to the outer sign in the direction of the shank of the latter, and the upper half-form is equipped with a fork for fixing the outer sign, on which the landing sections for the fork are made. / 716 15 P / 4 V 3 Yu fce.1 Fie.2 20 Fig.Z Phew 16 p 75; v FIG. five U 15 ;; / 3 3 .l // / J / z FIG. 6