SU906707A1 - Device for cutting plastic bar - Google Patents

Description

(54) DEVICE FOR CUTTING PLASTIC BAR

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The invention relates to automatic devices for cutting plastic material, in particular from clay or refractory mixtures, to measured lengths and can be used in the building materials industry, as well as in metallurgy in the manufacture of refractory products.

A machine for cutting raw brick is known; in which the cutting body is placed on the carriage, and its movement is carried out due to the rotation of the tension rollers of the belt conveyor under the action of the force of friction of the beam on the belt 1.

The disadvantage of this automaton is that the force for moving the cart with the cutting member is taken from the conveyor roller. This creates a braking torque on it, leading to the lumber slipping relative to the conveyor belt, which adversely affects the cutting accuracy.

The closest technical solution is a device for cutting a clay beam, consisting of a belt conveyor, a carriage with a single-stranded beam and a drive that connects the beam through the friction clutch and the cam clutch, which is activated by a special finger disc, chopping motion perpendicular to the axis of the beam 2}.

Since the cutting of the workpiece occurs without stopping the beam, in order to obtain a cutting plane close to the perpendicular to its axis, the carriage is informed by reciprocating longitudinal movement. This movement is due to a special slot-hole copier associated with the roller axis of the belt conveyor.

Claims (2)

A common drawback of the devices is a large load on the roller of the conveyor belt, leading to slippage of the clay mass relative to the conveyor belt, which, in turn, leads to a large variation in the length of the cut blanks, since the finger disk, which is the device of length, sits on axis of the same movie. The purpose of the invention is to improve the cutting accuracy of the timber. This is achieved by the fact that the device, including a belt conveyor, a finger disc, a carriage with one jet ray, a drive with a cam clutch and a friction clutch and a groove copier, is equipped with a gear drive, kinematically connected with a cam clutch and a groove copy. The drawing shows a kinematic diagram of the device. The device consists of a belt conveyor 1, one chain 2 with a single strut 1 onion 3 and a leash 4, ti 5, one end of which is fastened in the longitudinal groove of the double-arm lever 6, which receives an oscillatory movement from the groove copier 7, which, in turn, receives rotation through gear transmission 8, cam clutch 9 mounted on shaft 10, and friction clutch 11 with spring 12 and locking disk 13 from actuator 14 by means of wedge belt 15 and two gears I6 and 17. The unit also includes a finger disc 18 acting through two shoulders lever 19 and springs 20 and the cam sleeve through the crank mechanism 21 .. The device operates as follows. In the initial position, the drive 14 through the Yushno-belt drive 15 and the gear 16 transmits the rotation of the pole 17 not sitting freely on the shaft 10. A bar squeezed out on the press steps onto the conveyor belt 1, which informs the rotation of the finger disc 18. This disc is mounted with fingers periodically acts through the lever 19 on the cuff clutch 9. When the clutch is engaged, the clutch 11 under the action of the spring 12 presses against the gear 74 17, engages it with the shaft 10. As a result, the shaft 10 receives rotation from the drive 14, transmits through gear 8 first cam grooves 7 which through snarling 6, thrust 5 and the lead 4 informs carriage 2 reciprocates. At the same time, the rotation of the shaft 10 by the crank drive mechanism 21 is converted into a cutting motion of the beam 3. By the time the cut is completed, the cam clutch pulls the friction clutch II out of contact with the gear wheel 17 and presses it to the locking disk 13, the brake 10 starting position (top). The introduction of gear 8 into the device makes it possible to significantly reduce the braking moment on the axis of the roller of the belt conveyor, which completely eliminates the slippage of the bar relative to the conveyor belt. As a result, the linear movement of the beam without errors is converted into a corresponding change in the angle of rotation of the roller axis, and with it the finger disc 18, which is the element of reference length in this device. The invention of a device for cutting plastic bar, including a belt conveyor, a finger disc, a carriage with a single-stranded beam, a cam clutch and friction drive, and a grooved copier, characterized in that it is equipped with a gear kinematically associated with cam clutch .and grooving copier. Sources of information taken into account in the examination. I. USSR Authorship Certificate No. 543519, cl. B28 B 11/14, 1974. 2. USSR author's testimony K 580122, cl. B28 B 11/44, 1979. Jl Jl