CS202420B1 - Appliance for removing the overflows and packing of mouldings from rubber or plastic materials - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing overflows and packaging of rubber or plastic moldings.

A known method for removing overflows resulting from vulcanization of said moldings is by hand-cutting with the aid of scissors, and in a further operation, the moldings are packed in suitable packaging.

A more perfect method is to manually feed the rotating molding relative to a suitably adapted grinding wheel rotating on the shaft of the electric motor of the dedicated device. Also in this method, the packaging is carried out in a further self-acting operation.

A common disadvantage of these methods is the low labor demand. In the first one, there is a lot of manual work, since the moldings are, after manual processing, stored in pallets, which are placed on the next one, where the work is carried out. packaging · The moldings must be manually placed in the packaging and tightly closed. · In the second method, a considerable drawback is the fact that the machining qualities are directly influenced by the machining operator, in addition, whether there is a risk of accidents at work. the first way ·

These disadvantages are eliminated by the device of the invention, which consists in that it consists of a machine with a circular rotary table, which is provided on its periphery

202 420

202 420 moldings, wherein above the rotary table there are arranged means for pushing, chopping, grinding, removing and removing moldings, which enable removal of molded overflows. On the base frame of the machine with a circular rotary table, the discharge conveyor of the compacts together with the packaging device is then placed and firmly connected to this frame.

This arrangement allows these operations to take place in one cycle. The advantage of the device according to the invention is furthermore a significant increase in labor productivity, which is achieved by eliminating the loss of handling time and moldings during removal of overflows and moldings packaging. Another advantage is simplicity of operation, reduction of physical effort during handling and quality improvement. molding circuit ·

An example of the construction of the device according to the invention is shown schematically in the attached drawings, in which: Fig. 1 is a general side view of the device; Fig. 2 - a rough molding; Fig. 3 - part of an overflow chopping device; overflows, fig. 5 - molding removal device and fig. 6 - view in the direction of arrow P according to fig. 5 ·

The device essentially consists of a machine with a circular turntable 1, on the periphery of which are mounted carrier 2 of the preform 10, and further provided above the turntable 1 in the direction of its movement arranged device 2 P ^ro pushed moldings in carrier 2, a device £ chopping overflows 11 , device 2 P ^ o grinding overflows 12, device 6 for removing the preforms 10 from unašeěů 2 a device 7 for removing the preforms 10 from the removing device, discharge conveyor 8 for conveying moldings 10 к a packaging device and packaging device 2 ^Ρ Γ θ packaging blank 10 The discharge conveyor 8 is placed together with the packaging device 2 on a machine base frame (not shown) with a circular rotary table and thus fixedly connected thereto.

The machine with circular rotary table 1 (fig. 1) is designed for transport of pressed pieces 10 (fig · 2) to individual devices ·

The grippers 2 of the moldings 10 (FIG. 1) for holding the moldings 10 (FIG. 2) are equally spaced around the circumference of the rotary table 1.

The device 2 (Fig. 1) for pushing the moldings 10 into the carriers 2 is formed by a pressure cylinder 13 'whose piston rod 14 is displaceable in the direction of the arrow 15 and the spring washer 16'.

The device 4 (Figs. 1 and 3) for chopping overflows 11 of the blank 10: (Fig. 2) is formed by a pressure cylinder 17 «on whose piston rod 1 and sliding in the direction of arrow 15 is fixedly fixed plate 19« 21 resiliently linked β body 22 in whose center is loosely fitted ball 23, exceeding the one-third to one-half of its diameter over the surface of the body 22, allowing removal of overflows when there к moving body 22 in the direction of arrow 28 by a distance ^W and direct copying the bearing of the compact 10 in the carrier 2 (FIG. 1). The body 22 is further rigidly connected to the housing 24 in which the chopping knife 26 is fixedly fixed, the opening ** D of which is identical in shape and dimension to the shape and the external dimension of the compact.

202 420

10, in order to reduce the thrust force required to remove the overflow, the piston 24 is heated by means of a heating coil 27. In order to reduce heat losses, an insulating plate 2 'is inserted between the housing 24 and the body 22.

The device 5 (FIGS. 1 and 4) for grinding overflows 12 of the blank 10 (FIG. 2) is formed by a grinding unit 29, which is controlled by a pressure cylinder 20 which carries out a movement in the direction of the arrow 21. At the end of the spindle 32, there is a holder 34 in which the shaft 35 is fixedly mounted, on which the thrust washer 36 is rotated, which secures the moldings to prevent overflow when the overflow is removed. 37. removing the overflow 12 of the compact 10 (FIG. 2) The bracket 34 is provided with blades 33 at its periphery, which are arranged in the shape of a fan impeller, thereby removing the removed overflows 11, 12 when the unit is rotated. in the direction of arrow 39 and furthermore, at the bottom of these blades 38, cylindrical shanks 40 are movable in the direction of arrow 41 terminated by The elastic material 42 cleans the areas after the overflow 11 has been removed (FIG. 2).

The device 6 (FIG. 1) for removing the compacts 10 (FIG. 2) from the supports 2 of the compacts · 10 (FIG. 1) is formed by a thrust cylinder 43 on whose piston rod 44 sliding in the direction of arrow 45 whose piston rod 47, displaceable in the direction of arrow 65, controls two molded jaws 48; wherein the executive roll in the direction of the arrow 49 'of the apparatus 2 (Figs. 1, 5 e 6) for removing the moldings 10 (Fig. 2) from the apparatus 6 and transferring them to the exquisite conveyor 8 (Fig. 1) is formed by two separate units JO Ji and which are fastened on the plate £ 2, rotating in the direction of arrow 53 · and are also skewed relative to one another by 180 °, ^{p f} k Rice ^whether this unit consists of ^{t h} a coating roller 54. ^H o ^M · the bar 55 is movable in the direction of arrow 56 and at the same time rotatably mounted in the drum cam 57. on its shoulder 58 a nail 59 movable in the direction of arrow 60 is mounted, at the end of which the roller 61 is rotatably mounted. The ridge carries a pinion 63 firmly connected to a bracket 64 on which a pressure cylinder 65 is mounted, whose piston rod 66 slidable in the direction of arrow 67 actuates the jaws 68 rotatably mounted around the pins 69 and converts in the direction of arrow 70. arranged m conditions are created for storing the preform 10 (FIG. 2) on the discharge conveyor 8 (Fig. 1) such that they are alternately mutually shifted ^by 180 °.

The insertion conveyor 8 (FIG. 1) for conveying the compacts 10 (FIG. 2) to the packaging device is formed by chains 71 on which the brackets 72 of the compacts are fixedly spaced apart by a pitch T. The conveyor 8 is intermittently driven in the direction arrows 73 »

Ва ^ с! The apparatus 9 (FIG. 1) for wrapping the moldings 10 (FIG. 2) is formed by two coils 74 from which the bands 75 of the packing material are discharged through the rollers 76 and the shaped hopper 22, the longitudinal welding of the belt being ensured. two pairs of vertically disposed welding jaws 78 that perform a horizontal movement in the direction of arrow 82 and a reciprocating movement in the direction of arrow 22 thereby ensuring movement of the wrapping axis in the direction of arrow 80 and repeating this movement of the jaw 78 a certain package size. The transverse connection of the strip and at the same time its cutting is provided by one pair of welding 420 420 jaws 81 which perform horizontal movement in the direction of the arrow 82.

The device further includes mechanisms and apparatuses for controlling and synchronizing the movement of the individual devices, as well as devices for removing the overflows removed. For the sake of simplicity, the figures and descriptions are not shown or described.

When working on the device, the moldings 10 (FIG. 2) are successively inserted in the emerge of the arrows §2 (FIG. 1) into the carriers 2 mounted on the. a rotary atoll 1 which performs an automatic intermittent movement and carries the moldings 10 to the individual devices, whereby during the rest position of the rotary table 1 the desired operations are performed. The device 2 (FIG. 1) presses the compact 10 into the carrier 6, which is ensured by the reciprocal movement of the piston rod 14 'of the pressure cylinder 13 in the direction of the arrow 16. The device 4 (FIG. 1) ensures removal of the overflow 11 of the compact 10 (FIG. 2), which is made possible by moving the piston rod 18 of the tik cylinder 17 to the bottom dead center when the chopping blade 26 (FIG. moving the body 22 in the direction of the arrow 20 by the distance a, allowing the ball 23 to rest on the plate 19. Further pressure of the barrel 17 removes the overhead 11, whereby the chopping knife copies the possible inaccurate bearing of the compact 10. wn ^ i ^ i ^ i ^ i 2 ^at St ^ <^; ^: i 2 ^(Fig. 1) zaaistí removing the overflow 12 of the blank. 10 (FIG. 2) by the grinding unit 21. which is actuated by the pressure cylinder 30 and the rotary movement of the spindle 32 is provided by the electric motor 33. The spindle 32 moves in the direction of arrow 84. This ensures that the taper roller 20 'abuts the press plate J6 (Fig. 4). turning, while eliminating overflow. 12 (FIG. 2) by grinding wheel 37 &apos; (FIG. 4) and contamination of the area after the overflow 11 (obiT ' 2) of the brush 42. During the removal ^{of the} chain 12, these are simultaneously sucked off. The arrangement 6 (FIG. 1) removes the shank 10 from the carriers 2 by moving the piston rod 44 of the pressure cylinder 43 to the bottom dead center, the subsequent movement of the piston rod 47 of the pressure cylinder 46 into the upper dead center clamping the jaws 48 and thereby. gripping the compact 10 (FIG. 2). By moving the piston rod 44 of the pressure cylinder 43 back to the top dead center, the molding 10 is removed from the carrier 2. By means of the device 7 (Figs. 1, 5 and 6), the molding 10 is grasped and transferred to the discharge conveyor 8 (Fig. 1). , whereupon the movement of the piston rod 55 (FIG. 5) of teak cylinder 54 of unit 51 (Figure ^"6) in the direction of arrow (85 ^{(Figure '5) No} IMZ ^d ojde к poototoní ^b ubnov ^s va ^and ky 57 90 ° at the same time, moving the piston rod 66 in the direction of the arrow by moving the piston rod 66 of the cylinder 65 and the jaws 68 &apos; 86 the grip 10 is gripped and gripped firmly by the jaws 68. By moving the piston rod 47, the tensile cylinder 46 of the device 6 (FIG. 1) to the bottom dead center, the grip 10 is released from the jaws 48 'and allows further movement of the device . The movement of the piston rod 55 in the direction of arrows 86 indicate unit JI (Fig. 6) to the initial position. The next movement deslqr 52 (Fig * 5) in the direction Hpty ⁸ 7 ^(Fig. 6) »E rotates the entire withstand ^ 180% priceto C ^o m ^e Hyb follower 61 (FIG. 5) along the track cam surfaces 61 will move »bracket 64 with pressure roller 65 and čeHatmi ⁶⁸ at an angle alpha ^to the esters mm ^ í or equal to 90 °. Píotoi moving the rod 66 ^{in e} smSzu arrow 88 will release the claws 68 and pomace vypahnuí ^ 0 into the driver J2. conveyor 8 (FIG. 1). a conveyor 8 (FIG. 1) transports the compacts 10 (FIG. 2) to the wrapping apparatus 202202 (FIG. 1). The moldings 10 are deposited on the holders 72 from the device 7 (FIG. 1) such that they are rotated 180 ° alternately with respect to each other. The conveyor 8 is driven in the arrow 73 and performs intermittent movement by a pitch T ^M. The packaging device 9 (FIG. 1) ensures the packaging of a preselected number of moldings 10 in a suitable packaging material, such as polyethylene film. Moldings falling from the holder 72 of the discharge conveyor 8 (FIG. 1) into an envelope formed from belts 75 of the packaging material whose ends 89 are already welded after the previous packaging cycle. Upon dropping a certain number of moldings 10 into the formed package, the welding jaws 78 moving in the direction of arrow 82 longitudinally welds a portion of the package with a reciprocating movement in the direction of arrow 79 while moving in the direction of arrow 82 welding another portion of the obiae The welding jaws 81 move in the aesthetic of the arrow 82, weld the package transversely while cutting it. The formed container with the moldings 10 falls into the drain channel 90 and the whole cycle is repeated.

The device according to the invention can advantageously be used in the rubber or plastics industry.

SUBJECT OF THE INVENTION

Claims (4)

SUBJECT OF THE INVENTION An apparatus for removing overflows and packaging of moldings of rubber or plastics, in particular of the milking machine's teat extensions, characterized in that it consists of a machine with a circular rotary table. (1), which is provided on its periphery with carriers (2) of the moldings (10), and above the rotary table (1) there are arranged means (3) for pushing the moldings into the carriers, means (4) for grinding overflows, a device (6) for removing extrusions from carriers and a device (7) for removing extrusions and conveying a conveyor (8) is placed together with a packing device (9) on the machine frame with a circular rotary table (1) and is firmly connected. Device according to claim 1, characterized in that a plate (19) is fixedly fixed to the piston rod (18) of the overflow chopping device (4) (11), which is elastically connected by means of screws (20) and springs (21). with a body (22) in the center of which a ball (23) is loosely mounted. 3. Apparatus according to claim 1, characterized in that the holder (34) of the flow grinding device (12) is provided on its periphery with vanes (38) arranged in the form of a fan impeller, wherein the the lower parts of these vanes (38) are fixed by cylindrical shanks (40) terminated by brushes (42) of resilient rubber. 4. Apparatus according to claim 1, characterized in that the means (7) for removing the moldings. (10) is formed by two self-rotating units (50, 51) which are fixed to the plate (52) and are rotated 180 ° relative to each other, with the holder (64). with pressure. in addition, the roll (65) and the jaws (68) of each of these units are pivotable by an angle αF that is less than or equal to 90 °. 6 výkkeeů