JPS645804B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for automatically cutting a plate-shaped resin compound obtained by a mixing mill and conveying the cut resin compound to a calender roll.

[Conventional technology]

In a mixing mill, a gelled compound of thermoplastic resin, such as polyvinyl chloride, which has been premixed in a Banbury mixer or the like, is transformed into a plate shape between two rolls consisting of a front roll and a rear roll, and then the width is removed. This is to be supplied to the next calendering process.

[Problem that the invention seeks to solve]

Conventionally, the operations of cutting the width-stripped resin strip and placing it on a conveyor were performed manually. However, the plasticizer vapor and blended compound that evaporated during mixing It is harmful to the human body, and working in such an environment not only poses an occupational health problem, but also causes the body to become wrapped around mill rolls, which are huge rotating equipment, while they are rotating. It goes without saying that cutting the strip is extremely dangerous.

[Means for solving problems]

The present invention has been made in view of the above problems, and by automatically cutting a plate-shaped resin compound by remote control and transporting it on a conveyor belt, the above-mentioned work, which poses problems in terms of occupational health and safety, can be avoided. This was successfully carried out without human intervention.

[Effect]

That is, the present invention is rotatable with respect to the mixing mill front roll 20, and the front roll 20
A pair of width cutting knives 61, 61' configured to have a variable distance between the blades in the axial direction, and the knives 61, 6.
A cutting knife 83 that can run transversely in the axial direction of the front roll 20 for cutting the strip 100 widthwise by 1' is provided in contact with the surface of the front roll 20, and the resulting strip 100 is cut in the width direction.
This invention provides an automatic mixing mill strip cutting and conveying device in which a conveyor system for conveying the mixed mill strip is disposed around the front roll 20.

〔Example〕

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

Figure 1 shows a mixing mill 1 to which the present invention is applied.
1 is a perspective view of a conventional device showing 0.

A mixing mill consists of two rolls that are configured to face each other and rotate in opposite directions, that is, a front roll 20 and a rear roll 30. The upper space is the kneading section 40. Stop plates 50, 50' are installed at both ends of the kneading section 40 to prevent the supplied resin compound 53 from overflowing and falling outside the rolls during kneading.

Now, the resin compound 53 that has been preliminarily mixed and gelled using a Banbury mixer etc. is applied to the stopper plate 50.
The raw material is fed into the part of the kneading part (raw material input part) F near the raw material, and is sent in the direction of arrow g while being kneaded.

The compound 53 that has been completely kneaded (wound around the front roll 20) is cut into strips 100 with a suitable width 1 by a width knife 60' near the stop plate 50', and then hand-held. The roll 20 is cut with a cutting knife and manually placed on a conveyor belt 110 to be sent to the next calendering process.

In the present invention, the conventional width cutting knife and hand-held cutting knife are automated, and the apparatus is further equipped with a conveyor system for transporting the obtained strip 100.

FIG. 2 is a side view showing the positional relationship of the width removing knife section 60 and the cutting knife section 80 of the present invention with respect to the front roll 20.

First, to explain the width knife part 60,
As shown in FIG. 3, a pair of blade bodies 61, 61'
are supported by a pair of support plates 63, 63', respectively, and the support plates 63, 63' are supported by the same moving shaft 69 having a key groove 65 therethrough. The moving shaft 67 is rotated by an air cylinder 70 under the action of a crank 69.

That is, by moving the air cylinder 70 up and down, the moving shaft 67 is rotated by the action of the crank 69, so that the blade bodies 61, 61' are rotated in synchronism via the support plates 63, 63'.

Further, the lower portions of the support plates 63, 63' are held between a pair of moving plates 71, 71'. A female thread is formed in the center of the moving plate and engages with the threaded shaft 73. The screw shaft has, for example, a left-hand thread on the left half and a right-hand thread on the right half, so by rotating the pulley 75 with the motor 77 at a remote location, the movable plates 71 and 71' can move toward or away from each other. ,
Eventually, the blades 61, 6 are cut through the supports 63, 63'.
The distance l between the blades 1' can be arbitrarily adjusted to be narrower or wider in the axial direction of the roll.

In this way, the blade bodies 61, 61', which are set at a predetermined distance l between the blades, continue to rotate according to the above-described mechanism and approach the front roll 20, and continuously roll the compound 53 wound around the roll with a width l. Cut into strips 100.

Note that the blade bodies 61, 61' are relative to the front roll 20,
Preferably, they are positioned at an angle of 0 to 45 degrees.

Next, the cut knife section 80 will be explained.
As shown in FIG. 4, the blade 83 supported by the support plate 81 is movable in the front-rear direction by an air cylinder 85. Also, the air cylinder 85
is fixed on a transverse base 89 by another air cylinder 87 arranged perpendicular thereto. Therefore, when the blade body 83 is operated, it is advanced by the air cylinder 85, and when the blade edge comes into contact with the front roll at an appropriate distance and stops, the blade body 83 is moved forward by the air cylinder 87, and the blade body 83 is moved forward by the air cylinder 85. The strip 100 is moved across the roll axis while touching a predetermined portion, and the width-removed strip 100 is transferred to the front roll 2.
Cut off from 0.

The strip 100 which has been width-widthed and cut from the front roll 20 as described above is sent to the next calendering process by a conveyor belt 110.

Therefore, when the strip 100 is conveyed to the side where the front roll 20 is installed, the conveyor belt 110 is moved in the positional relationship shown in FIG.
are arranged around the front roll 20. Note that the belt angle (the angle that the belt makes with the horizontal plane) may vary depending on the type of resin compound handled, but in the case of vinyl chloride resin, the maximum angle that can be conveyed without slipping is about 35 to 40 degrees.

On the other hand, when conveying the strip 100 to the side opposite to the front roll 20, that is, to the rear roll 30 side, as shown in FIG. At the same time, the lower belt 110 is arranged so as to wrap around this overhang part. In this case, the tension of the belt is determined by the tension pulley 1.
It is desirable to be able to adjust it by 16. In this manner, the strip 100 is sandwiched between a pair of conveyor belts 110, 115 and is easily conveyed in opposite directions. Note that it is of course optional to further combine other conveyors 117. The strips 100 of the resin compound 53 are soft and have almost no elasticity, so if you try to handle them by hand, they will easily tear and are very difficult to handle. However, as mentioned above, the conveyor system that combines multiple belts can change the direction. Transportation with transportation is easily performed. In addition, other embodiments of the conveyor system are shown in FIGS. 7a to 7d.

The phototube 120 can also be installed in the conveyor system so that if the strip should break midway through, it can be automatically restored.

〔Effect of the invention〕

As described above, according to the present invention, a resin compound obtained by a mixing mill can be produced by remote control without the need for workers to enter an environment that poses occupational health problems or to touch dangerous rotating equipment. It can be width-widthed, cut, transported, and then provided for the next calendering process.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional mixing mill, and FIG. 2 is a side view showing the positional relationship between a width knife and a cutting knife of the present invention. Third
The figure is a perspective view showing a width removing knife, and FIG. 4 is a perspective view showing a cutting knife. 5 and 6 are side views showing the conveyor system of the present invention,
FIGS. 7a to 7d are schematic diagrams showing other examples of conveyor systems.

Claims (1)

[Claims] 1 A pair of width-cutting knives 61, 6 that are rotatable relative to the mixing mill front roll 20 and configured to have a variable distance between the blades in the axial direction of the front roll 20.
1', and a cutting knife 83 capable of running transversely in the axial direction of the front roll 20 for cutting the strip 100 width-cut by the knives 61, 61' in the width direction, is provided in contact with the surface of the front roll 20, A mixing mill strip automatic cutting and conveying device comprising a conveyor system for transporting the obtained strip 100 arranged around the front roll 20.