JP2016120664A - Roll kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll kneader which quickly, uniformly and efficiently kneads a flexible material such as a rubber and a synthetic resin material that is used in injection molding, sheet rolling, film rolling, extrusion molding and the like.SOLUTION: A roll kneader includes a pair of cone rolls 3 which horizontally move rolls 1 of mixing rolls 1 and 2, peel a flexible material wound around the roll 1, and peel up the flexible material and bring the peeled up flexible material closer to the side in the movement direction. A pair of left and right cone rolls 3 simultaneously move in the same direction, and knead the flexible material wound around the roll 1 while sandwiching the flexible material between both of the cone rolls 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a roll kneader that kneads a flexible material such as rubber, synthetic resin material, etc. used for injection molding, sheet rolling, film rolling, extrusion molding, etc. quickly and uniformly.

  As a kneading machine for various kinds of small quantities for kneading pigments and other additives into a resin material, a roll kneading machine excellent in versatility is well known, but a conventional kneading machine has a dispersibility of the resin material to be kneaded. Unfortunately, it took a long time to obtain uniform kneading of colors, additives, and the like.

  The known roll kneader described in Patent Document 1 has a pair of left and right winding rolls (cone rolls) in a drum shape in contact with the peripheral surface of the front mixing roll among two horizontal (front and rear) mixing rolls. By moving alternately toward the center, the resin material wound around the entire surface of the front roll is peeled off so that only half of it is peeled off. Although kneading is performed, kneading still requires a long working time.

JP 2002-178330 A

  The kneader of the present invention has three types of (1) rough kneading operation, (2) medium kneading operation, and (3) finishing kneading operation, in order to overcome the disadvantages of the prior art described above. It is an object to knead a uniform resin material without unevenness in a short time.

  The problems of the present invention are solved by the invention-specific matters described in the claims. That is, as described above, only the kneading operation is performed only by one-sided alternating operation with a pair of left and right winding rolls, and a pair of left and right winding rolls is a rough kneading operation, a middle kneading operation, and a finishing kneading operation. The problem is solved by performing two kneading operations.

  According to the present invention, the best processing operation can be selected with a compact apparatus, and high-quality kneading work can be performed in a short time.

  The kneading machine according to the present invention allows a pair of left and right drum-shaped winding rolls to perform three kneading operations of a rough kneading operation, a middle kneading operation, and a finishing kneading operation in order or freely select them. .

  The present invention will be described in detail based on the illustrated embodiment. FIG. 1 shows a roll kneader A provided with a winding mechanism for a flexible material (rubber, synthetic resin material, etc.) according to the present invention. The mixing rolls 1 and 2 of the roll kneader A are supported by a pair of support frames 31 installed on both sides of the base 30, both of which are made of rubber, synthetic resin material, etc. that are kneaded by an electric motor (not shown). It rotates so that the flexible material C, an additive, etc. may be wound. The front roll 1 of the mixing roll is driven at a higher rotational speed than the rear roll 2 and rotates so as to wind the resin material C around the peripheral surface.

  In this front roll 1, a pair of rotating cone rolls (winding rolls) 3, 3 having a drum shape that gently spreads toward the top are arranged on the left and right so that the front ends thereof are in contact with the front roll 1. The Each cone roll 3 arranged in a direction orthogonal to the front roll rotates while its rotating shaft is supported by a bearing of a case 4 housing a drive motor, a reduction gear, and the like, and the case 4 is connected via a connecting arm portion 5. Is moved to the left and right along the slide beam 32. The rotation speed of the cone rolls 3 and 3 is driven in proportion to the rotation speed of the front roll 1.

  As shown in the figure, a linear guide 33 serving as two upper and lower slide rails is provided on the slide beam 32 that is mounted across the pair of left and right support frames 31, 31. The upper and lower transmission nut parts 6 move. The transmission nut portion 6 is screwed with a transmission screw 7 that is rotated by an electric motor (drive motor) 8, and the upper and lower transmission nut portions 6 and the transmission screw 7 respectively form a screw transmission mechanism. By the forward / reverse operation of the electric motor 8, the transmission nut portion 6 screwed with the transmission screw 7 moves in the left-right direction, and accordingly, the rotating cone roll 3 also moves in the left-right direction as described above.

  A linear encoder (not shown) is attached between the slide beam 32 and the transmission nut portion 6 or the connecting arm portion 5, and the amount of movement (movement position) of the cone roll 3 is detected. A rotary encoder 20 is attached to the shaft end of the transmission screw 7 to detect the moving speed of the cone roll 3. The moving amount (moving position) and moving speed of the cone roll 3 are controlled by a PLC (sequencer), and the flexible material that changes every moment is kneaded by an appropriate method. 2 to 4 show various operation methods for program-controlling the movement of the two cone rolls 3 and 3.

  Next, the movement of the pair of rotating cone rolls 3 and 3 will be described with reference to FIGS. The figure shows the movement of the left and right cone rolls 3 and 3 that move in contact with the front roll 1 and the flow of the soft material C to be kneaded, (1) rough kneading, (2) medium kneading, (3) finishing kneading, The three types of kneading steps are shown.

  (1) One-sided alternating operation of the roughing process: First, the operation by the kneader is started, and the front roll 1 is rotated by winding a flexible material around the entire circumferential surface thereof. Now, when the right cone roll 3 in the standby state at the right end moves to the center side of the front roll 3, the flexible material peels off from the front roll 1 as shown in FIG. Overlay on material. The overlapped flexible material is kneaded by the front roll 1 and the rear roll 2 which are mixing rolls, whereby the roughing process is executed. Next, as shown in FIG. 2b, when the right corn roll 3 moves from the center side to the right and enters the standby state at the right end, the left corn roll 3 moves to the right and the left edge of the flexible material. Is peeled off from the front roll 1 in the same manner and wound to the right, and the left half of the flexible material is superposed on the right half and fed to the front roll 1 and the rear roll 2. In this way, the left and right corn rolls repeat the movement alternately to roughly knead and knead the resin material across the width direction and the flow direction of the resin material. In the case of this driving method, the left and right cone rolls move at three speeds of low speed, medium speed, and high speed according to instructions from the control device.

  (2) Both-side parallel movement operation in the middle mixing step:-Next, as shown in FIGS. Repeat the parallel movement and perform the intermediate mixing process. The flexible material C wound around the front roll 1 is formed as a single lump by being interposed between the left and right cone rolls 3, 3 and distributed uniformly throughout, and the flexible material is uniformly mixed. . The predetermined interval can be changed for each cycle, or can be changed by controlling the movements of the left and right cone rolls in one cycle to be different. In this driving method, it is desirable to move the left and right cone rolls at a low speed.

  (3) Opposing squeezing operation in the finishing and kneading process:-Finally, as shown in FIG. 4, the left and right cone rolls 3, 3 are moved from each end to the center, and the flexible material is squeezed at a predetermined interval generated thereby. Finish kneading by kneading all the flexible materials together. By the finishing and kneading process, the flexible material is mixed more uniformly. The left and right cone rolls 3 and 3 are brought to the center, but they may be opposed diaphragms that are held in place without moving during kneading, or opposed diaphragms that approach or move away from each other. You may do it. The predetermined interval can be changed for each cycle, or can be changed by controlling the movements of the left and right cone rolls in one cycle to be different.

  The above kneading process is controlled by a control device based on an instruction from a display screen, a keyboard or the like. The number of rotations and rotations (total) of the mixing rolls 1 and 2 in each process, the number of rotations of the cone rolls 3 and 3, movement amount, movement speed (or low speed, medium speed, high speed recipe), movement time, stop time, The waiting time and the like are set as specific numerical values, and typical driving methods are summarized in a recipe. And the recipe of each such process is memorize | stored in a computer. By selecting the recipe on the screen of the display, the roll kneader of the present invention can continuously perform the rough kneading step, the middle kneading step, and the finishing kneading step as instructed.

  Flexible materials such as rubber and synthetic resin materials used for injection molding, sheet rolling, film rolling, extrusion molding and the like are quickly and uniformly kneaded by the kneading machine that performs the kneading step of the present invention. Furthermore, by selecting the set recipe, it is possible to perform automation without manpower in the kneading operation, thereby reducing the risk and reducing the manufacturing cost.

FIG. 1 is a front view and a side view of a kneader for carrying out the process of the present invention. 2a and 2b are schematic views showing the movement of the cone roll in the roughing process. 3a and 3b are schematic views showing the movement of the corn roll in the intermediate mixing step. FIG. 4 is a schematic diagram showing the movement of the corn roll in the finishing process.

A Kneading machine C Flexible material 1 Front roll 2 Rear roll 3 Cone roll

Claims (2)

A mixing roll comprising a front roll (1) and a rear roll (2) for kneading the flexible material (C);
A pair of left and right cone rolls (3, 3) that move left and right while touching the tip on the front roll (1) and peel off the flexible material wound around the front roll (1) and turn it toward the moving direction;
In a kneader equipped with
The left and right cone rolls (3, 3) are simultaneously moved in the same direction so that the flexible material (C) wound around the front roll (1) is sandwiched between the two cone rolls and kneaded. Kneading machine.   Further, the left and right cone rolls (3, 3) are simultaneously moved in the center direction, and the flexible material (C) wound around the front roll (1) is configured so as to perform the opposite squeezing between the two cone rolls. The kneader according to claim 1, wherein

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