JPH0355211A - Mixing method and mixing roll apparatus - Google Patents

Abstract

PURPOSE:To improve the efficiency of mixing by charging a kneading material between rolls from upside thereof in a state of making the gap of the rolls narrower than a set value in the mixing period, and then performing mixing in expanding the gap of the rolls momentarily up to the set value. CONSTITUTION:When a kneading material 3 is charged between rolls 1, 2 from upside thereof, the kneading material 3 almost never falls, because the gap (c) of the rolls 1, 2 is made narrower, and begins to wind around the outer periphery of the roll 1 gradually. As it is confirmed that the kneading material is wound around the outer periphery of the roll 1 and it becomes to be a degree of not falling therebetween even in the case that the gap (c) is expanded, the pressure caused by operating fluid is extracted from fluid pressure cylinders 13. Upon removal the pressure, the fluid pressure cylinders 13 contracts momentarily through urging force of elastic mechanisms 22, and shaft boxes 5 slide integrally with the cylinder main bodies 13a, further, the gap (c) of the rolls 1, 2 is returned to the set value in the mixing period which is determined by the kind the kneading material 3, and the mixing is conducted. Thus the improvement of the mixing efficiency can be done.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mixing method and a mixing roll device for mixing materials such as rubber and plastic.

[Prior art] Generally, in the processing process of rubber, plastic, etc.
In order to uniformly knead the main raw materials and additives, as shown in FIG. 3, a pair of rolls 12 whose axes 0102 are parallel to each other in the horizontal direction are used, and the gap C can be adjusted by a gap adjustment device (not shown). The rolls 1.2 are arranged side by side, and the rolls 1.2 are rotated at speeds of V+ and V2 (Vl > V2) so that the rotation directions at their facing portions are from above to below, respectively, and the additive is spread between the rolls 1.2. The mixed wire material 3 such as rubber or plastic is introduced from above, and the mixed wire material 3 is
A roll l rotating at high speed is seen relatively at a speed of ■1.
The cross wire material 3 is wrapped around the outer periphery in a sheet form, and the cross wire material 3 is wrapped around the roll 1.
．． When passing between the two, a shearing force is applied to the mixed wire material 3 due to the rotational speed difference between the rolls 1 and 2, and mixing is performed. (For example, refer to the "roll masticating device" described in Japanese Utility Model Application Publication No. 51-10373.) However, when the cross-wire material 3 is put between the rolls 1.2, it does not wrap around the outer periphery of the rolls 1. There is almost no description in the literature about how to handle the cross-conducting material 3° that has fallen from between the rolls 1 and 2. Generally, the cross-conducting material 3° is received by a receiving tray 4 placed below between the rolls 1 and 2, and the cross-conducting material is removed. 3' is collected by a worker using a shovel or the like and reused.

[Problem to be solved by the invention]

However, in the above-mentioned mixing roll device,
The gap C between the rolls 1 and 2 is maintained at a setting value (usually about 5 to 6 Ilm) during mixing determined for each type of cross-wire material 3 by a gap adjustment device (not shown) from the beginning of mixing to the end. Because roll 1 is held at
．． Many of the cross-contacting materials 3° fell from between the two, and the burden on the workers who collected the fallen cross-conducting materials 3° was heavy.

Moreover, as a recent trend, with the increasing variety of products in small lots, it has become common to mix different cross-conducting materials 3 one after another in succession, and in such cases, different types of cross-conducting materials 3 are mixed together. If it is stored, it cannot be reused, so every time the type of crosstalk material 3 changes, it is necessary to collect the crosstalk material 3 that has fallen onto the tray 4, which increases the frequency and puts an even greater burden on the workers. It was getting big.

In view of these circumstances, the present invention aims to provide a mixing method and a mixing roll device that can reduce the amount of cross-contact material that falls between the rolls, improve mixing efficiency, and reduce the burden on workers. It is.

[Means for Solving the Problems] The present method invention provides a mixing method in which mixing material is introduced from above between a pair of rolls having different rotational speeds with a required gap, and is wound around the outer periphery of the rotating rolls for mixing. With the gap narrower than the set value during mixing, the mixed wire material is introduced from above between the rolls, and after confirming that the mixed wire material is wrapped around the outer periphery of the rotating rolls, the roll gap is instantly widened to the set value. In addition, according to the present invention, the pongee lines are arranged parallel to each other with a required gap in the horizontal direction, and the rotation directions at the opposing parts are directed upward. A pair of rolls facing downward and having different rotational speeds, an axle box that rotatably supports the rolls, and an axle box that supports at least one of the axle boxes are slid, and the gap between the rolls is adjusted at the time of mixing. a gap adjustment device for adjusting the set value; a fluid pressure cylinder for changing the roll gap interposed between the gap adjustment device and the axle box slid by the gap adjustment device; It is characterized by comprising an elastic mechanism that constantly biases the axle box in the direction of widening the roll gap.

[For production]

Therefore, in the method of the present invention, the cross-wire material is introduced from above between the rolls with the roll gap narrower than the set value during mixing, and after it is confirmed that the cross-wire material is wrapped around the outer periphery of the rolls rotating at high speed. , the roll gap is instantly widened to the set value and mixing is performed.

Furthermore, in the apparatus of the present invention, with the fluid pressure cylinder contracted, the axle box is slid by the gap adjustment device to set the roll gap to the set value for mixing, and then the fluid pressure cylinder is applied to the biasing force of the elastic mechanism. When the rollers are stretched against the resistance, the axle box is slid to narrow the gap between the rolls and held, and a cross-conductor material is introduced from above between the rolls rotated at different rotational speeds. Because the gap is narrowed, it hardly falls, and gradually begins to wrap around the outer periphery of the rotating roll, and when it is confirmed that the cross-wire material has wrapped around the outer periphery of the roll, and it does not fall even if the gap is widened, the When the fluid pressure cylinder is operated in the direction of contraction, the fluid pressure cylinder is instantly contracted by the biasing force of the elastic mechanism, the axle box slides, and the roll gap is returned to the setting value at the time of mixing, and mixing is performed. be exposed.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show an example of an apparatus for carrying out the method of the present invention, and 5 and 6 are rolls that rotate at a speed of 1 (relatively high speed rotation) and rotate at a speed of 1%v2. This figure shows a pongee box that rotatably supports each roll 2 (rotating at relatively low speed), and the shaft box 5 of roll t allows roll 1 to slide in the direction toward or away from roll 2. In addition, the axle box 6 of the roll 2 is supported by the housing 7 in a fixed state.

Further, as shown in FIG. 2, a support nut 8 is fixed to a predetermined position on the side opposite to the shaft box 6 of the housing 7, and each axis o+, 02 of the roll 1.2 is attached to the support nut 8 so that the axes thereof are in the horizontal direction.
A worm wheel 11 that is rotatably driven by a worm shaft 10 is spline-fitted to the end of the screw shaft 9 on the side opposite to the shaft box 5, and the screw shaft 9 A gap adjusting device 12 is constructed to adjust the gap C between the rolls 1.2 by sliding the axle box 5 by moving in the axial direction by the rotational drive of the axle box 5, and between the gap adjusting device l2 and the axle box 5, A fluid pressure cylinder 13 whose operating speed can be set faster than that of the gap adjustment device 12
to intervene.

In this embodiment, as shown in FIG. 2, the cylinder body 13a of the fluid pressure cylinder i3 is fixed to the axle box 5, and the tip of the piston rod 13b is connected to the screw shaft 9 via the block l4. , in the block 14,
If an excessive load is applied from the axle box 5 side, the part indicated by the symbol S in Fig. 2 will be damaged, and the axle box 5 will be able to move to the right in Fig. 2 by the gap Jt. A shear plate 14a is built in to prevent overload from being transmitted to the gap adjustment device l2.

Furthermore, one end of the rod IB parallel to the scree shaft 9 is pivotally attached to a bracket H5 protruding from the outer circumference of the cylinder body 13a of the fluid pressure cylinder l3, and the other end of the rod l6 is inserted into the housing 7. An elastic member 20 having both ends of the compression spring 18 supported by a restraining plate l9 is fitted to the other end of the rod 16 which is passed through the space 17, and the other end of the rod l6 is fitted. External threaded part 1
Holder nut 2 for positioning at 6a! is screwed to form an elastic machine $11122 that constantly urges the axle box 5 in the direction in which the rolls 1 and 2 are separated.

Note that 23. 24 indicates a drive shaft for rotationally driving the roll 1.2, and in the above embodiment,
For the sake of explanation, the mechanism for sliding the axle box 5 on the non-drive side of the roll i has been described, but the same applies to the drive side.

Next, the operation of the above embodiment will be explained.

First, the screw shaft 9 is rotated together with the worm wheel 11 by driving the worm shaft IO, with the piston rod 13b positioned at the stroke end on the contraction side without applying pressure by the working fluid to the hydraulic cylinder 13. The screw shaft 9 is moved a required amount in the axial direction with respect to the support nut 8, and the gap C between the rolls 1.2 is set to a setting value during mixing determined by the type of the cross-wire material 3.

After this, by applying pressure by the working fluid to the first-stage hydraulic cylinder l3, the elastic mechanism 22 equipped with the compression spring L8
Resisting the urging force of , the hydraulic cylinder i3 is extended so that the cylinder body 13a moves to the left in FIG. 2 relative to the piston rod 13b, and the axle box 5 is slid within the housing 7. The gap C between the rolls 1.2 is narrowed to a required value (usually around 1m) and maintained.

In this state, roll 1 was rotated at a speed of VIIV2.
When the cross-wire material 3 is introduced from above between 2, the cross-wire material 3
Since the gap C between the rolls 1.2 is narrowed, the rolls hardly fall and gradually begin to wrap around the outer periphery of the rolls 1.

When it is confirmed that the crosstalk material 3 is wrapped around the outer periphery of the roll, and it does not fall even if the gap C is widened, the pressure caused by the working fluid is released from the fluid pressure cylinder L3.

When the pressure is released, the fluid pressure cylinder 13 instantly contracts due to the urging force of the elastic mechanism 22, and the axle box 5 slides to the right in FIG. 2 together with the cylinder body 13a, and the roll 1.2
The gap C is returned to the mixing setting value determined by the type of crosstalk material 3, and mixing is performed.

In this way, it is possible to reduce the amount of the mixed material 3° (see FIG. 3) falling from between the rolls 1 and 2 without significantly extending the time required for mixing the mixed material 3, and as a result, the mixing efficiency can be improved, and Even when mixing different types of cross-conducting materials 3 one after another, the work of collecting the fallen cross-conducting materials 3 by the worker is reduced, which greatly helps to reduce the burden on the workers.

It should be noted that the mixing method and mixing roll device of the present invention are not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the mixing method and mixing roll device of the present invention, it is possible to reduce the amount of falling mixed wire material, improve the mixing efficiency, and especially improve the continuous mixing of different kinds of mixed wire materials. This has the excellent effect of significantly reducing the burden on workers during mixing.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view showing an example of an apparatus for carrying out the method of the present invention, FIG. 2 is a detailed view of the section ``■'' in FIG. 1, and FIG. 3 is a side sectional view showing a conventional example. 1.2 is a roll, 3 is a cross-wire material, 5.6 is an axle box, 7 is a housing, 8 is a support hole, 9 is a screw shaft, to is a worm shaft, 11 is a worm wheel, l2 is a gap adjustment device, 13 is a fluid pressure cylinder, 18 is a compression spring, 22 is an elastic mechanism, Ch, 02 is an axis, C is a gap, Vl, V2
indicates the rotation speed. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Scope of Claims] 1) In a mixing method in which mixing material is introduced from above between a pair of rolls having different rotational speeds with a required gap, and mixed by being wrapped around the outer periphery of the rotating rolls, the roll gap is set at the time of mixing. Insert the mixed material from above between the rolls with the gap narrowed below the specified value, and after confirming that the mixed material wraps around the outer periphery of the rotating rolls, instantly widen the roll gap to the set value and perform mixing. Characteristic mixing method. 2) A pair of rolls that are arranged side by side with a required gap between the rolls so that their axes are parallel to each other in the horizontal direction, the directions of rotation at opposing parts are from above to below, and the rotation speeds are different, and the rolls are rotated. an axle box that supports freely; a gap adjustment device that slides the axle box that supports at least one of the rolls of the axle box to adjust the roll gap to a set value during mixing; the gap adjustment device and the gap; a fluid pressure cylinder for changing the roll gap that is interposed between the axle box slid by the adjustment device; and an elastic mechanism that constantly urges the axle box slid by the gap adjustment device in a direction to widen the roll gap. A mixing roll device comprising: