SU51633A1 - Press for molding plastic products - Google Patents

Description

For the molding of plastic materials with through lateral holes, presses are used that are equipped with additional punches, which enter the matrix from the sides, and perpendicularly mow the main punch.

In the proposed press, related to the specified type of presses, in order to move additional punches, their shanks are made in the form of gear 1X rails interlocking with gear wheels, which are also rotated by gear racks; the latter receive reciprocating movement from Wolf eccentrics.

In FIG. 1 shows a vertical section through a press; FIG. 2 is a section along the line AB in FIG. one; FIG. 3 side view.

A metal base 4 is bolted to a metal plate 1 lying on a concrete base, in which a shaft 5 is placed, driven by an electric motor.

The rotation of the shaft 5 (120 revolutions per minute) through the teeth 2 and 2 is transmitted to the shaft 77 (12 revolutions per minute), which causes the rotation of the five wolf 14 round sinusoidal eccentrics attached to it 14, 15, 21, 75, 14. These eccentrics rotate in the amplitude-oscillating frames 13, 16, 20, 16, 13 (Fig. 1 and 2). Rods 77, 72, 79, 72, 77 are tightly attached to these frames in the upper and lower parts. When the eccentrics rotate, the frames are lowered and raised by the double eccentricity of the eccentric, i.e. by the amount that makes up the full amplitude of the frame oscillations, and the rods 77, 72, 19, 12, 11 also move up and down in guide grooves made in beams 18 and 23. With a uniform rotation of the shaft 17, the speed of the vertical movement of the frame periodically changes during each rotation of the shaft according to the law of sines.

The eccentric Wolf informs the frame of a harmonically oscillating movement up and down with two breaks during a full revolution of the eccentric shaft 77, at the other end of which the flywheel is attached with a weight 8. When the eccentric shaft 77 rotates, the eccentric 27 raises and lowers the rod 28 attached to the frame 20 which is attached to the pressing stamp 30. Eccentrics 75, 75 rods 22, 22, attached to the frames 75, 16 and at the end of the bearing couplings 42, 42, raise and lower

A disk 56 along six guide posts 4J (Fig. 2). Twelve toothed racks 37 are made around the inner circumference of the disk 36, which engage on the teeth 35, which are placed on rollers 38 in the body of the bed 44. These teeth 35 engage teeth of the shanks 33 of the side punches 32, which have a tooth in the bottom part. Thus, as the disc 36 moves upward, the teeth 35 rotate in the direction of the arrow; the shanks 5J move in the direction g.

Ceramic mass 27 in the form 31 is pressed with a stamper 30, at the same time round punches 32 punch holes in it, which usually happens in sockets from four to eight. When the disc 36 is moving down the serrations 55, rotated along arrow e, the punches 32 move along the arrow m, leaving an exact hole in the mass 27, and the punches 52 are removed from the mold 5 / earlier than the stamp 30 is raised. stuck to the stamp 30, the latter is heated by steam or electric current to 80-90.

When the shaft (7) rotates, the eccentrics J4, 14, the rods 48, 48, at the ends of which interchangeable couplings 49, 49 are attached, lift the plate 57, which moves its ends along the guide lugs made in the frame 4. On the plate 51, the push stands 45 are reinforced, 45, which, with heads 50, 50, push ready molded articles onto a horizontal smooth table 47 of the press. At the side of the frame, a mechanism is inserted which pushes the finished pressed product (eg, a socket) out from under the stamp.

For this purpose, a pulley 6 is mounted on the shaft 5, rotated through the gearbox or through the screw to the electric motor, which causes the pulley 7 of the roller 26 to rotate. On the latter, the missing tooth 46 (Fig. 3) is hooked to its teeth the teeth of the rod 52 and moving it and the bottomless box 55. When the box 55 moves in the same direction and in the other direction, a mass is fed into the mold, and at the same time the same box moves forward 30 cm forward on the smooth horizontal table 47, from which the finished products are manually folded on tra sporter direction for a dryer or kiln.

To release the air inside the mass, there are holes 55 in the die with a diameter smaller than the diameter of the material particles. With these holes, air escapes into the atmosphere through channel 54.

The subject matter of the invention.

A press for molding plastic products with G use of additional punches entering laterally into the mold in a plane perpendicular to the axis of the main ram, characterized in that to communicate the movement to additional punches the shanks are made in the form of gear racks coupled to gear wheels, receiving rotation from the toothed racks, which are reciprocated, for example, using eccentrics.

to the author's testimony of P. I. Kosteruk

jYo 51633

to the author's testimony of P. I. Kosteruk

No. 51833

IG.2

S copyright testimony P. And, Kosteruk

JSs 51633

FIG 3