JPS5838314B2 - rubber kneading machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in rubber kneading machines.

Conventionally, in a rubber kneading machine, as shown in FIG. 1, rubber is fed into a lower kneading section 2 having a pair of rotors 1, 1 from an input port 3 in the middle, and a cylinder in a presser cap 4 in the upper step. It is known that a weight 5 is used to apply weight to the introduced rubber and push the rubber down into the kneading section 2 during kneading.

? By the way, the cylinder 6 of the pressing part 4 raises and lowers the cylinder weight 5 between the raised position A, the pressed position B, and the pressed position C, and for pressing from the pressed position B to the pressed position C, for example, 6 cylinder weights are used. Since an air pressure of kg/cni is required, conventionally the same amount of air pressure was supplied over the entire stroke of the cylinder 6, resulting in wasteful air consumption.

The present invention has been made in view of the above-mentioned conventional problems.
Air pressure for pressing is not required for lifting and lowering between the raised position and the pressed down position, which accounts for 70% of the total stroke.
For example, focusing on the fact that an air pressure of 1 kg/crA is sufficient, the cylinder is constructed of a small diameter cylinder for between the raised position and the pressed position, and a large diameter cylinder for between the pressed position and the pressed position. Moreover, a locking mechanism is installed to lock the large diameter cylinder in the depressed position, reducing the stroke by 30% of the total stroke.
Rubber can be pressed against the kneading section using only a large diameter cylinder.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the push-down part 4 has pillars 9, 9 provided with a top plate 8 erected on a base 7 above the rubber inlet 3, and the top plate 8 has a raised position A. A small diameter cylinder 10 having a stroke 1 between
A large-diameter cylinder 12 having a stroke l2 between the push-down position B and the push-down position C is fixed, and the large-diameter cylinder 1
A cylinder weight 5 is attached to the second piston rod 13, and a small diameter cylinder 10 and a large diameter cylinder 12 are vertically connected.

The small diameter cylinder 10 has an inner diameter d1 of, for example, 300 and 1
It is operated with an air pressure of ~2 kg/crA, and the large diameter cylinder has an inner diameter d2 of, for example, 600 mm and is operated with an air pressure of 6 kg/tsl.

The upper lid 14 of the large-diameter cylinder 12 includes the pillars 9, 9.
The large diameter cylinder 1 is provided with penetrating guide holes 15, 15.
2 to ensure that it is guided up and down without shaking.

The base 7 has an upper cover 14 of the large diameter cylinder 10 which has been lowered by the small diameter cylinder 10 and is in contact with the base 7.
A locking mechanism 18 is provided in which a cylinder 17 supports a pawl 16 for locking.

As described above, when the push-down part 4 of the rubber kneading machine is operated, the input port 3 is
Put the rubber etc. into the kneading section 2 from the door 19 of the input port 3.
After closing, when forward air is supplied to the small diameter cylinder 10, the large diameter cylinder 12 is lowered by the piston rod 11 to the position where it contacts the base 7, and at the same time, the cylinder weight 5 is also lowered from the raised position A to the pressed position B. do,
Lightly press down on the inserted rubber, etc.

The large-diameter cylinder 12 is locked in position by a claw 16 when forward air is supplied to the cylinder 17, thereby preventing the weight from floating during kneading.

Next, when forward air is supplied to the large diameter cylinder 10, the cylinder weight 5 is lowered by the cylinder rod 13 from the pressed position B to the pressed position C, and the pressed rubber etc. are further transferred to the rotors 1, 1 of the kneading section 2. The rubber wires start to be crossed.

When the rubber kneading is completed, return air is supplied to the large diameter cylinder 12, and the cylinder weight 5 is moved by the cylinder rod 13.
is raised from the pressing position C to the depressed position, then after supplying return air to the cylinder 17 to release the lock by the claw 16, when supplying return air to the small diameter cylinder 10, the cylinder weight 5 is pushed down by the piston rod 11. It will now be lifted from the position to the elevated position A.

As is clear from the above description, the present invention has a configuration in which the cylinder at the push-down part of the rubber mixer is constructed by vertically connecting a small-diameter cylinder and a large-diameter cylinder, and the weight is set in the raised position and in the pressed down position. In the light load pressure range between the push-down position and the push-down position, a small diameter cylinder is used to raise and lower the load, and in the high load pressure range between the push-down position and the push-down position, a locked large-diameter cylinder is used to raise and lower the lift. As shown in the figure, it is no longer necessary to supply the same amount of air pressure regardless of the light and high load pressure ranges, and the air cost can be reduced by about 40%.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional rubber kneading machine, and FIG. 2 is a sectional view of a rubber kneading machine according to the present invention. 2...Kneading section, 3...Input port, 4...
...Pressed part, 5...Cylinder weight, 1
0... Small diameter cylinder, 12... Large diameter cylinder, 18... Lock mechanism, A...
Raised position, B...Pressed position, C...Pressed position.

Claims (1)

[Scope of Claims] 1. Rubber is introduced into the lower kneading section from the middle input port, and the cylinder weight of the upper press section is used to
In a rubber kneading machine in which a weight is applied to the input rubber and the rubber is pushed down to the mixed line part, the cylinder at the pushing part is used as a small diameter cylinder that raises and lowers the weight between the raised position and the pressed position. , characterized in that large-diameter cylinders for raising and lowering the weight between the pressed-down position and the pressed-down position are arranged vertically in series, and a locking mechanism is provided for locking the large-diameter cylinder in the pressed-down position. Rubber kneading machine.