SU1321591A1 - Wedge device to mixing rolls - Google Patents

Abstract

The invention relates to the polymer machinery industry and can be used for the processing of polymer materials on a mixing roll. The purpose of the invention is to increase the degree of homogenization of the polymer material being processed by providing additional deformations. For this, the mixing body is made in the form of at least two plates P 10 with protrusions 11 located perpendicular to the working surfaces P 10 and actuators 12 for moving P 10, each of which is hingedly connected with a corresponding P 10. On the working surface the reflector wedge is provided with guide grooves 17 for mounting the P 10. The surface of the latter is made flush with the working surface of the reflector wedge. The pitch and length of the protrusions 11 are equal to the width of the P 10, and the height and thickness are respectively 0.6-0.9 and not more than 0.5 values of the roll gap. The components of the mixture, which fall into the mezhvolkov gap, are subjected to significant shear deformations under the action of moving L 10 and protrusions 11. 1 3.p. f-ly, 2 ill. i (L 18

Description

I

The invention relates to the polymer machinery industry and can be used for the processing of polymer materials on a mixing roll.

The aim of the invention is to increase the degree of homogenization of the processed polymer material by providing additional deformations.

Figure 1 - given the wedge device, a general view; working position; Fig.2 - the same5 view from the drives of the plasfin.

The wedge device comprises a wedge-reflector 1 installed on the frame (not shown) mounted above the roll gap between the rolls 2 and 3, the mixing body 4 located along it and the drive for reciprocating movement of the wedge 1 in the form of a pin 5, st 6, hinges 7 connecting each of the studs 5 with the cross beam rollers (not shown) and the flywheels 8 and 9. The mixing body 4 is made in the form of at least two plates 10 with protrusions 11 located perpendicular to the working surfaces plate 10, and drives 12 for ne emescheni plates. The rod 13 of each of the actuators 12 by means of a fork 14, an axis 15 and a bracket 16 is connected with the corresponding plate 10. On the working one. the surfaces of the wedge 1 are made parallel to the forming shaft 3; The guide grooves 17 for mounting the plates 10, which move along the grooves 17 by means of rollers 18. The surface of the plates 10 is made flush with the working surface of the wedge 1. equal to the width of the plate 10, the height of 0.6-0.9, and the thickness of not less than 0.5 between the roll gap "

The device works as follows.

After installing the necessary clearance between the working surfaces of the wedge-reflector 1 and the roll 3 s. by means of an actuator for moving the wedge and turning on the rollers the components of the mixture 19 to be processed and supplied by Mine. into the gap between the roller 3 and the reflecting wedge 1, envelop the roller 3, induce significant shear deformations in the inter-roll gap and

912.

in the gap between the working surfaces of the wedge-reflector 1 and roll 3. Simultaneously with turning on the rollers, each drive 12 is turned on. Rods 13 begin to move, dragging the plates 10 with the projections 11. In the extreme position of the rods 13, the drives 12 are switched and the plates 10 move reversed. At the same time, a part of the processed mixture 19, located in the gap between the reflecting wedge 1 and the roller within one plate 10 between the projections 11 ' is displaced along the forming roller 3 and at the next moment of time is pressed in the direction towards the interwave gap with a new portion of the mixture 19 on roll 3. Thus, alternating deformations of the processed mixture 19 are carried out along the forming roll 3, which leads to intensive mixing of the processed mixture 19, which ensures its high degree of homogeneity. In this case, not all gshastin 10 drives can be switched on. Caladom drive 12 can be given its own frequency and amplitude of two-fold for the deck of plates 10, and if the values of frequencies and amplitudes of motion for all plates 10 coincide, the latter can move in different phases.

The half-period of the reciprocating movement of the plates 10 should preferably be equal to the time in which the elementary volume of the mixture being processed passes a distance equal to the width of the plate. Due to the uneven distribution of velocities in the deformation zone, this time should correspond to the values of t-sS / V, where S is the plate width, m; V - circumferential speed of the roll, m / s.

Otherwise, the additional mixing effect of the wedge device with mixing organs is not achieved, since the elementary volume of the material returns to the same or close to it place where it was located during the beginning of the plate dvshchki period.

In order to prevent the mixture to be processed beyond the roll 3, the amplitude of movement of the plates 10 is limited to six values of the roll gap, and the extreme protrusions are removed from the ends of the plates by an amount.

equal to three values of roll gap. With the step of the protrusions 11 less than the width of the plate, the energy dissipation due to the considerable resistance to the flow of the mixture 19 increases, which leads to thermal decomposition of the material. With a step larger than the plate width, the degree of hemogeneity of the mixture decreases. When the protrusions are longer than the plate width, there is a danger of breakage of the body 10 made in the form of at least the transverse part of the protrusion, and with a length of less than the plate width, the active shear area in the gap decreases (the latter relates to the height of the protrusions less than 0.6 ). When the height of the protrusions is more than 0.9, the magnitude of the roll gap, energy dissipation in the deformation zone between the ridge of the protrusion and the roller leads to a local thermal destruction of the mixture 20 to a deterioration in its quality. The excess of the thickness of the protrusion 11 more than 0.5 magnitude of the roll gap leads to a deterioration of the strength characteristics of the structure.

Claims (2)

Claim 1: A wedge device for mixing rollers comprising two plates with protrusions arranged perpendicular to the working surfaces of the plates and actuators for moving the plates, each of which is hinged to the corresponding plate, and on the working surface of the wedge-reflector guide grooves for mounting the plates, the plate surface being flush with. working surface of the wedge-reflector. 2. The device according to claim 1, characterized in that the pitch and length of the protrusions are equal to the width of the plate, and the height and thickness are respectively 0.6-0.9 and not more than 0.5 of the inter-roll gap. 15914 A wedge-reflector located along the frame above the inter-roll gap, a mixing organ and a drive for the reciprocating movement of the wedge located along it, characterized in that, in order to increase the degree of homogeneity of the processed mixture by providing additional deformations, mixing the body is in the form of at least Two plates with protrusions perpendicular to the working surfaces of the plates, and actuators for moving the plates, each of which is hingedly associated with the corresponding plate, and on the working surface of the wedge-reflector there are guide slots for installing the plates, and the surface of the plates flush with. working surface of the wedge-reflector. 2. The device according to claim 1, characterized in that the pitch and length of the protrusions are equal to the width of the plate, and the height and thickness are respectively 0.6-0.9 and not more than 0.5 of the inter-roll gap. 13 Editor G. Volkova FIG. Compiled by N. Ruhl Maid Tehred.L.Opiynyk Proofreader V. But ha Order 2708/11 Circulation 564 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Project St., 4