JPH01321989A - Mill for paper making - Google Patents

Abstract

PURPOSE:To surely carry out break, beating and friction of raw material by making an opposing face of milling plates into a dented faces, arranging a great number of opening members at the dented face at positions not to mutually come into collision and enlarging degree of charge of raw material in a mill. CONSTITUTION:An opposing face of a pair of milling plates 3 is made into a dented face and a chamber 31 to charge a raw material is constituted. The dented face is protrusively equipped with a great number of opening members 31 and the opening members 31 are arranged at positions not to mutually come into collision in rotation and movement of the opposed opening members 31 opposed each other. Friction force between the raw material is strengthened while the raw material is being kneaded by the opening members, only fibers are loosened and can be opened without grinding foreign matters.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper mill that uses a defibrating member to disintegrate, beat, and rub raw materials for various paper stocks into high-quality fibers. be.

[Conventional technology]

In general, it is known that the grinding of paper stock involves disintegration, beating, and friction of paper stock materials between the grinding surfaces of a fixed disk and a sliding disk to produce high-quality fibers. In order to adjust the grinding force by increasing or decreasing the distance between the grinding surfaces, a method has been proposed in which a movable grinding blade is slid and controlled by a screw mechanism using a hydraulic cylinder, a pneumatic cylinder, or an electric motor.

That is, in this grinder, as described in Japanese Utility Model Publication No. 48-6722, the grinding blades on the sliding disks are elastically pressurized and gradually pushed out as each disk is continuously worn away by grinding. In order to prevent changes in the grinding gap and constantly perform constant-pressure beating, grinders are often used that are hydraulically, pneumatically, or mechanically operated with an automatic load adjustment system.

On the other hand, a special machine for disintegrating paper flakes, peeling off ink, dispersing wax, etc. by friction of the paper stock is equipped with a screw a, a defibrating blade, and a spacer C as shown in Fig. 5. A machine called a kneader installed in d is also frequently used.

[VI problem to be solved by the invention However, in this conventional disk-type grinding machine, plate-shaped grinding blades are used as disks that face each other, and the gap between them is adjusted to improve the disintegration, beating, and friction level of the paper stock. However, if the gap is narrowed to promote disintegration, beating, and friction, the foreign matter will be crushed and cannot be removed by the screen in the subsequent process, which poses a quality problem. When performing friction and kneading at high concentrations, if the gap is narrow, the fibers will break and the effective fiber content will decrease, or conversely, the fibers may escape through the grooves of the plate blade, impairing the fibrillation and dispersion processing performance. There was a problem with the decline.

On the other hand, because of the structure of the kneader type grinder, the kneading part is long and it is not suitable for high-speed rotation, and the gap between the rotor and stator is also larger than that of the disc type, so there are problems in obtaining sufficient grinding effects. Ta. Furthermore, in order to strengthen the grinding effect, the opening on the raw material outlet side is pressurized and closed with a lid using an air cylinder, etc. to increase the degree of raw material filling in the neating zone, but there is a problem that the load is unstable. Ta.

The present invention aims to accurately eliminate these conventional drawbacks by increasing the degree of filling of the raw materials in the grinder, increasing the frictional force between the raw materials, removing only the fibers and not crushing foreign substances, and constantly grinding. It is possible to demonstrate the ability of grinding work under ideal conditions and accurately disintegrate, beat, and rub raw materials to produce high-quality fibers, greatly improving the efficiency of grinding work,
Another object of the present invention is to provide a highly safe grinding machine that can freely change the raw material filling degree during operation and operate stably under a constant load.

[Means for solving problems]

The present invention forms opposing grinding surfaces in a grinding plate,
When supplying papermaking raw materials to the gap where at least one of the grinding surfaces slides and pressurizes the paper stock to defibrate, beat, and rub the paper stock,
In the paper mill which is operated by adjusting or increasing the gap between the grinding surfaces, the opposing surface of the grinding plate is formed into a concave surface to form a chamber filled with the raw material, and a number of fibrillating members are protruded into the concave surface. The paper mill is characterized in that the defibrating members arranged opposite to each other are arranged at positions where they do not collide with each other when rotating.

[For production]

This paper mill is designed to handle various raw material processing amounts and raw material types.

The motor that drives the movable grinding plate is controlled based on processing condition data such as raw material concentration, gap, and load, and is moved toward a set pressure point to maintain a predetermined gap and continuously adjust the gap. The chamber formed between the grinding plates is filled with raw materials, and the fibers are kneaded with a defibrating member to increase the frictional force between the raw materials, loosening only the fibers and not crushing foreign substances. In particular, the raw material fed into the chamber is blown around the outer periphery of the plate by centrifugal force, and the gap is narrow, increasing the degree of filling of the raw material.It is also easy to adjust, allowing for accurate positioning of the grinding member. disintegration, beating,
Friction work can be performed optimally under ideal conditions, and these works can be performed in safe conditions.

〔Example〕

An embodiment of the present invention will be described on the side of a single-type grinder with reference to the drawings. A grinding plate 3.3 provided in an inner chamber 2 formed by a casing 1 is connected to a fixed disk 4 or a movable disk. The movable disks 5 are respectively provided to form opposing grinding surfaces, and the movable disks 5 are connected to the rotating shaft 6.
It is rotatably supported by the bearing part 7 via the
The bearing part 7 is movably mounted on a rail 9 by a sliding leg part 8 so as to slide in the axial direction, and the grinding plate 3 of the movable disk 5 and the grinding plate 3 of the fixed disk 4 are provided. This allows the gap between the plate 3 and the chamber 3 degrees to be adjusted.

In this case, the opposing surfaces of the pair of grinding plates 3.3 are formed into concave surfaces 3□ to form a chamber 31 filled with raw materials, and a large number of defibrating members 31 are protruded from the concave surfaces 3. The opposing defibrating members 31 are arranged at positions where they do not collide when rotating.

The fibrillating member 31 is a round bar-shaped pin or bar member, for example, a bar member having a square, star-shaped elliptical, or cone-pyramidal cross section, and the concave surface 3 becomes closer to the center of the grinding plate 3.
□ is arranged so that only the fibers are loosened and the kneading effect is increased. Even in the case where the defibrating member 31 is formed, it is preferable to select the height of the defibrating member 31 and provide it protrudingly.

The grinding plate 3 is constructed by arranging divided members having an inclined surface or a concave curved surface, whose thickness increases from the inner periphery toward the outer periphery, in a ring shape to form a disc-shaped desk. Alternatively, a plate having an integral structure in which a concave surface is formed on one surface of a ring-shaped body whose opposing surfaces are conical surfaces may be used. The surface near the outer periphery of the disk may be flat, but it is a convex disk that always has a slight gap and forms a raw material flow path for the raw material to flow out on the facing surface of the outer periphery so that the raw material can easily escape. It is preferable to provide a plurality of portions 32 or grooves radially.

The rotating shaft 6 is connected to the main motor 11 of the prime mover via a coupling 10 so as to be slid and rotationally driven, and the bearing portion 7 is screwed onto the feed screw shaft 12 and rotates in the axial direction. It has a moving slider part 13, and the screw shaft 12 is connected to a servomorph 15 via a reducer 14.
The grinding gap can be adjusted in units of 0.01 mW by moving the slider part 13 on the screw shaft 12 and adjusting the grinding plate 3 of the movable disk 5. has been done.

In the figure, reference numeral 16 denotes a screw conveyor that supplies the raw material between the grinding plates 3 and 3 in the inner chamber 2 for grinding. 17 is a discharge port, 18 is a gland packing part, 19 is a fixed frame,
20 is a bearing, and 21 is an air cylinder which is provided as necessary to slide the stator side, that is, the supply side, instead of sliding the rotor side. The grinding plate 3 may be moved.

In the example shown in FIG. 3, the opposing grinding plates 3.3 are fixed and not moved in the axial direction.

In addition, as shown in Fig. 4, it is better to incorporate a disc-type grinder into the waste paper processing system so that printing ink, true melt, Wank Star, etc. can be efficiently dispersed. 16
By using a processing line that combines a steam mixer (chemical mixer) 22 and an inclined thickener 24 via a screw press 23, an energy-saving waste paper processing plant that can save power and reduce the amount of steam used can be achieved.

Further, the grinding plate 3 may be of a single type on one side, or may be of a double type, or both may be used as a movable grinding surface.

〔Effect of the invention〕

In the present invention, the facing surface of the grinding plate is formed into a concave surface to form a chamber filled with the raw material, and a large number of defibrating members are provided protruding from the concave surface, and each of the defibrating members disposed opposite to each other is rotated. By being arranged in a position that does not collide when
Disintegration, beating, and friction work can be carried out by constantly adjusting the degree of filling of the raw material to ideal conditions. However, the chamber formed between the grinding plates is filled with the raw material, and the raw material is kneaded with a fibrillating member while the raw materials are mixed together. By increasing the frictional force, it is possible to loosen only the fibers and defibrate them without crushing foreign substances.In particular, the raw material fed into the chamber is blown around the outer periphery of the plate by centrifugal force, and the gap is narrow, reducing the degree of raw material filling. It is easy to raise and adjust, allowing optimal disintegration, beating, and friction treatment, and quick and accurate response to load fluctuations.In addition to greatly improving disintegration, beating, and friction capabilities, stable operation is guaranteed. In addition, the machine can be made smaller than the kneader method, has extremely high reliability, and can easily and quickly change load setting conditions.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a longitudinal cross-sectional view of the grinder, FIG. 2 is a partially sloped view, FIG. 3 is a longitudinal cross-sectional view of another embodiment, and FIG. 4 is a view of one use. FIG. 5, which is an explanatory diagram of the state of the system, is a conventional vertical cross-sectional view. DESCRIPTION OF SYMBOLS 1... Casing, 2... Inner chamber, 3... Grinding plate, 3,... Chamber, 3□... Concave surface, 4...
・・Fixed disk, ・・Movable disk, 6・・Rotating shaft, 7・・Bearing part, 8・・Sliding leg part, 9・・Rail, 10・・Camping ring, 11・・- Main motor, 15... Servo motor, 31... Defibration member, 32
...Protrusion.

Claims (4)

[Claims] (1) Opposing grinding surfaces are formed by grinding plates, and when papermaking raw materials are fed into the gap where at least one of the grinding surfaces slides and is pressurized and subjected to disintegration, beating, and friction, the above-mentioned In a paper mill that operates with a gap between the grinding surfaces adjusted or increased, the opposing surface of the grinding plate is formed into a concave surface to form a chamber filled with raw materials, and a number of fibrillation members are protruded from the concave surface. A paper-making grinder characterized in that each of the disintegrating members arranged opposite to each other is arranged in a position where they do not collide when rotating. (2) The milling machine according to claim 1, wherein the fibrillating member is a round rod-shaped pin or bar member, and is arranged in such a manner that the amount of protrusion increases as it approaches the center of the milling plate. (3) The grinding plate is configured into a disc-shaped disc by arranging divided members whose thickness increases from the inner circumference toward the outer circumference in an annular manner, and the opposing surface is a conical surface. The grinder according to claim 1 or 2. (4) A claim in which the grinding plate is a disk disposed opposite to each other on a stationary side and a rotating side, and is provided with a convex portion or a groove forming a raw material flow path for raw material outflow on the outer peripheral opposing surface. The grinder according to 1, 2 or 3.