RU1804453C - Scissors for rectilinear cutting of glass-mass portions - Google Patents

Abstract

SUMMARY OF THE INVENTION: the scissors are made with a lower knife 6 and an upper knife 17 moving in a working cycle towards each other in a straight line with the carriages 4 and 18 along the guides. In this case, the lower knife 6 is mounted on the carriage 4 with a support in the form of a plate 7 with a rod 8, which is pivotally connected through a L-shaped lever 10c with a spring shock absorber, the compression spring 15 of which receives the contact forces arising between the knives 6 and 17 during the drop drop, and restricts the movement of the knife 6. An embodiment is possible when the surface of the plate 7 carrying the knife 6 is made at an angle of 1-5 ° to the plane of the knife 17. 1 zpp-f-ly, 3 ill.

Description

Figure 2

The invention relates to the building materials industry, in particular to drip feeders of glass forming machines for the manufacture of piece products, and more particularly, to the drip feeder shear mechanism.

The purpose of the invention is to increase the yield and useful life of knives.

In FIG. 1 shows the scissors in plan; figure 2 - section aa in fig. 1 ; in Fig.3 - node I in Fig.1.

 In FIG. Figures 1 and 2 show a scissors mechanism for a straight cut of portions of glass melt driven by a piston rotary air motor. Moreover, this type of drive is one of the possible designs. The scissor mechanism is mounted on the frame 2, to which the drive is also attached. The mechanism comprises guides 3, carriages 4 and 18, supports 5, bearing lower knives 6. Each support 5 consists of a plate 7 and a rod 8 moving in the bearing 9 with the possibility of adjusting its height position through the L-shaped lever 10 by means of a clutch 11 through screw 12 and nut 13 with handle 14.

Inside the clutch 11 (see Fig. 3) there is a spring shock absorber having a compression spring 15, the force of which is determined by the position of the sleeve 16. In this case, one end of the spring 15 abuts against the end of the sleeve 16, and the other against the end of the screw head 12.

The upper knife 17 is mounted on the carriage 18 through the support 19. Under the knife 17, a reflector 20 is mounted, equipped with a mechanism for its longitudinal regulation 21 (along the knife) and lateral movement 22.

The scissors mechanism is attached to the feeder bowl 23 by means of brackets 24 and 25, the last of which is connected to the frame 2. Each of the carriages 4 and 18 is connected to the drive rotary air motor 1 by means of a t 26 and cranks 27, rotating the central gear 28 and, accordingly, a pair gears 29 engaged with it, on the shafts of which cranks 27 are mounted.

Scissors work as follows. When compressed air is supplied to one of the cavities of the rotary air motor 1, its piston rotates the central gear 28 through the rack, which, through the gears 29, rotates the cranks 27, which drive the carriages 4 and 18 through the rods 26, providing full stroke the piston of the air motor 1, the movement of the carriages from the initial position to the working, by cutting droplets of molten glass and returning them to their original (open) position.

In the next cycle, when compressed air is supplied to the opposite cavity of the air motor, the duty cycle is repeated.

Under the influence of the cranks 27, the carriages 4 and 18 synchronously approach the center of the mechanism, the lower knife 6 meets the upper knife 17, and there is a segment of droplets of molten glass produced by the feeder. After that, both knives with carriages 4 and 18 return to their original position, where in the period between the work cycles in the static position of the mechanism, the blades 6 and 17 are sprayed.

The carriages 4 and 18 are moved along the guides 3 mounted on the frame 2. The direction of fall of the cut droplets can be adjusted by setting the reflector 20 to the appropriate position in space using the handles 21 and 22. Pre-adjustment of the height of the lower knife 6 provides the required technology tension g at the contact of the upper 17 and lower 6 knives at the moment

cut. This tension is regulated by a handle 14, which transmits rotation to the screw 12, which, interacting with the nut 13, moves the clutch 11 in the housing of the carriage 4, while turning the L-shaped lever 10, which, acting on the rod 8, changes the height position of the plate 7 and accordingly the lower knife 6.

When the knives meet, the lower knife 6 can move down. At the same time, it decreases

to a predetermined height corresponding to its installation height relative to the lower plane of the upper knife 17. In this case, the knife 6 compresses the spring 15, providing a contact force in a pair of knives equal to the force of the spring 15, taking into account the ratio of the shoulders of the lever 10.

Thus, when cutting drops of glass melt, the required contact force between the knives is provided, which

can be adjusted to the extent permissible by technology by changing the force of the spring 15.

The design of these scissors provides an increase in the life of the knives

and reducing the trace of the cut.

Claims (2)

SUMMARY OF THE INVENTION 1. Scissors for straight cutting portions of glass melt containing at least a pair of knives mounted on slide carriages towards each other along the guides, the lower knife being fixed to the carriage by means of a support equipped with a mechanism for adjusting its position in height, such that, in order to increase the yield of the products and the service life of the knives, the support carrying the lower knife made in the form of a plate mounted on a rod, which is pivotally connected via a L-shaped lever with a spring shock absorber. 2. Scissors according to claim 1, characterized in that for the purpose of improving the quality of the cut by increasing the contact forces between the knives, the surface of the plate carrying the lower knife is made at an angle of 1-5 ° to the plane of the upper knife. Compiled by T.Paramonova Editor A.Kuprokova Tehred M. Morgenthal Corrector M. Samborska Order 1070 Mintage Subscription VNIIIPI of the State Committee for Inventions and Discover at the USSR State Committee for Science and Technology 113035, Moscow, Zh-35, Rauska nab., 4/5 Production and Publishing Plant Patent, Uzhhorod, 101 Gagarin St.