SU1632783A1 - Rod cross-cutting device - Google Patents

Abstract

The invention relates to equipment for the mechanical processing of polymeric materials and can be used for cutting polyester rods in an incompatible state into button blanks. The goal is to improve the quality of the billets by increasing their accuracy. The device comprises a cutting unit, a rod holding unit, a periodic supplying unit and a drive. The holding unit of the rod 19 is made in the form of a drum (B) 11 with annular grooves 17 on its cylindrical surface. The knives 9 are located in the grooves 17. The order of their location is chosen so that the lengths of the rods are cut strictly in half. The rotational pitch B 11 corresponds to the pitch of the knives 9 around it and the pitch of the channels located in B 11 for the rods. At 11 is inclined. This reduces to a minimum the distortion of the shape and size of the resulting segments. 3 silt Yu (L se co u j 00 co 13

Description

The invention relates to equipment for the mechanical processing of polymeric materials and can be used in mechanical engineering for cutting elastic materials.

The purpose of the invention is to improve the quality of the resulting blanks.

FIG. 1 shows a device for transverse cutting of rods from elastic-viscous materials to dimensional workpieces, general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. 2

The device for cutting rods comprises a housing 1, on which a cutting assembly 2, a stem holding assembly 3, a core feeding assembly 4 and a drive 5 are mounted. The cutting assembly 2 is a faceplate 6 fixedly mounted on the housing 1 with the sleeves 7 fixed on it which fixes the shanks of the holders 8 knives 9. On the same faceplate fixed axis 10 with a drum freely mounted on it

11 knots 3 with holding and bark 12 of node 4 of the periodic supply. In addition, on the axis 10, the thrust washer 13 is fixed in a fixed position 13. To the koryu 12, through the sleeves, a driving lever 14 is attached with screws

on it by the groove 15, in which the rod being cut is located, the spacers and grooves in the faceplate 6 provide the possibility of oscillatory movement of the system consisting of the lever 14, the groove 15 and the core 12, relative to the faceplate 6 around the axis 10. In addition, the measles

12 is equipped with a ratchet 16, engaging with a serrated thread, made

on the end surface of the drum 11. In the drum 11 there are annular grooves 17 and channels 18 for accommodating the rods 19 to be cut.

The device works as follows.

The actuator 5 (pneumatic cylinder) informs the actuator lever 14 and the bark 12 connected to it, oscillating movements around the axis 10, which is transformed by means of the ratchet 16 into intermittent rotation of the drum 11 around the axis 10. The step of moving the drum 11 is matched with the pitch of the channels 18 in it ( Fig. 2) in such a way that the axis of the chute 15 during the transfer of the movement of the ratchet 16 from the core 12 to the drum 11 coincides with the axis of one of the channels 18. The combination of these axes occurs at the moment of the end of the idle and the beginning of the working stroke of the core 12. At this moment the workers The devices are in the initial position. During idle stroke of the core 12, the drum 11 is stationary, and during the working stroke receives a stepping movement from it. The end of the cut rod 19, laid in the inclined chute 15, as a result of the combination of the axes of the chute 15 and the channel 18 under

°

g 0

with

0

five

50

0

the force of gravity and the inclined position falls into the channel 18 and reaches the thrust washer 13. After this, the working stroke begins, i.e. the system begins to move consisting of the rod 19, the chute 15, the lever 14, the core 12, the ratchet 16 and the drum 11 around the axis 10, whereby the cut rod 19 is fed to the fixed knife 9 fixed in the holder 8, the shank of which is fixed in the sleeve 7. Since the blade of the knife 9 is located in the annular groove of the drum 11, then further pull the rod 19 on knife 9 cutting occurs initially a segment whose length is a multiple of the desired length of the segment. At the end of the working stroke, the idling stroke begins, during which the drum 11 is stationary, and the rod 19, the groove 15, the lever 14, the measles 12 and the ratchet 16 are returned to their original position, in which the axis of the groove 15 is combined with the axis of the next drum channel 18 11 and the next feed rod 19 is carried out. The cycle is then repeated, and the initial section in the previous channel 18 of the drum 11 is brought to the next knife 9, the arrangement of which is chosen so that the initial section is cut in half. In subsequent cycles, further division of the segments into halves occurs until the required length of the measuring segment is obtained. In the last position (pos. 9, fig. 2), the thrust washer 13 has a window and a series of finished measuring segments under the action of gravity is removed from channel 18, thus preparing channel 18 to receive the next volume of rod being cut 19.

Since the order of location of the knives 9 in the annular grooves of the drum 11 is selected in such a way that each successive cutting of the segments occurs under conditions of equal remoteness of the cutting plane from the ends of the section being cut, i.e., the segment is cut exactly in half, the reasons causing the shape distortion and sizes of the obtained segments are minimized, which significantly improves the quality of the measured segments.

Claims (1)

Invention Formula A device for transverse cutting of rods from elastic materials to dimensional workpieces, containing knives mounted on a housing, a periodic feed unit and a holding rods section to be cut, made in the form of a drum with annular grooves on its cylindrical surface and channels for rods parallel to the axis the drum and passing through the annular grooves, characterized in that, in order to increase the accuracy of the blanks, the knives are fixedly mounted on the housing around the drum and the blade of each of them located in a separate annular groove of the drum, and the drum is set obliquely and made with the possibility of stepwise rotation at an angle equal to the central angle between two adjacent channels, wherein the node of the periodic supply is made with the possibility of oscillatory movement with respect to the drum with an amplitude of oscillations equal to the distance between two adjacent channels of the drum. FIG. I FIG. 2