JPH08323744A - Rotary cutting roll for replaceable blade of pelletizer - Google Patents

Abstract

PURPOSE: To detachably replace the cutting blade die of a rotary cutting roll for cutting and granulating strand. CONSTITUTION: Protrusions 3 and engaging recesses 3 are alternately formed at the rotary cutting roll body for cutting strand in the lengthwise direction in the lateral direction of the outer periphery. A fixing unit 5 of a lengthwise direction and a cutting blade die 6 are engaged with the recess 3. Several bolt holes are opened at the unit 5, and a clamping bolt 7 is detachably engaged with the hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replacement blade for a pelletizer in which a cutting blade die of a rotary cutting roll for cutting and granulating strands of various materials such as synthetic resin to be sent out in a pelletizer can be detachably mounted. The present invention relates to a rotary cutting roll.

[0002]

2. Description of the Related Art Conventionally, a rotary cutting roll used for manufacturing a resin pellet by cutting a strand sent to a pelletizer of this type with a rotary cutting roll has a large number of cutting blades on its outer periphery. As shown in 7, there are those that are fixed by adhesion. However, as the above-mentioned adhesive fixing means, the present situation is that melt adhesion in which a cutting blade die is attached to the outer peripheral mounting portion by silver brazing is generally performed.

[0003]

In the rotary cutting roll described in the prior art, even when the strand is cooled from the extruder, heat is generated in the rotary cutter and the fixed blade base and the strand is cut. Since the blade type silver brazed part is broken and separated, and the blade tip is greatly chipped, the strands cannot be cut accurately and the rotary cutting roll itself becomes unusable, resulting in a large loss. Had. Therefore, the present invention has been made to solve such a conventional problem, and its object is to detachably attach a cutting blade die on the outer periphery of a rotary cutting roll for cutting a strand. An economically efficient pelletizer that can be fixed and used when the cutting blade die wears or is broken and the cutting blade die is detached only for that part and a new cutting blade die can be attached and fixed. The present invention is intended to provide a rotary cutting roll for a spare blade.

[0004]

In order to achieve the above object, in the rotary cutting roll for a replaceable blade of the present invention, the rotary cutting roll main body for cutting the strands has a protruding portion and a concave fitting in the lateral direction of the entire outer circumference. A large number of parts and parts are formed alternately. A fixed body in the longitudinal direction and a cutting blade die are fitted into the concave fitting portion. The cutting blade mold can be replaced by screwing it to the fixed body so as to be rotatable and removable with several bolts.

[0005]

The present invention has the above-mentioned construction. The usage will be described now. The strand (20) fed from the extruder through the cold water tank is fed from the feed roll (16) to the fixed blade base (1).
If the rotary cutting roll body (1) for cutting in 7) is used for a long time, the cutting edge (14) of a part of the cutting blade die (6) may be worn or damaged, resulting in a decrease in cutting efficiency. When a good product is produced, the fixing bolt (7) is loosened to remove the fixed body (5) and the cutting blade die (6) without replacing the rotary cutting roll body (1), and a new cutting blade die (6) In this case, the rotary cutting roll is economically used by mounting the cutting blade die (6) on the fixed body (5) and fixing it again.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a part of a pelletizer, and a rotary cutting roll body supported by a frame body (18) facing the pelletizer. (1) is the opposite side plate (4)
(4) and the outer peripheral portion (9), and the protrusion (2) and the concave fitting portion (3) in the longitudinal direction with respect to the lateral direction of the outer peripheral portion (9).
A large number of and are formed alternately. In the concave fitting portion (3),
As shown in FIG. 6, the fixed body (5) and the cutting blade die (6) are fitted inside. The solid body (5) has a rectangular cross section and is formed in the longitudinal direction, and several bolt holes (12) (12) are arranged at predetermined intervals.
… Is drilled. Further, an inclined side (13) convenient for fitting is formed on one side surface of the fixed body (5).
Further, the cutting blade die (6) shown in FIG. 5 has a blade tip (14) formed at one end in the longitudinal direction. Then, after the fixed body (5) is fitted into the concave fitting portion B of the outer peripheral portion (9) with the fixed body (3) and the cutting blade die (6), the bolt holes (12) (12) 3) with several fixing bolts (7) and (7), as shown in FIG. 3, it is detachably fixed to the outer peripheral portion (9). Reference numeral (8) indicates a side plate fixing bolt for fixing the body side plate (4) to the outer peripheral portion (9),
(10) shows a nut that holds the rotary cutting roll main body (1) from the outer circumferences of the rotary shafts (11) and (11) serving as support shafts at both ends.

The rotary cutting roll main body (1) is supported by a frame main body (18) as shown in FIG. 1, and a fixed blade base (17) is held forward by a pressing roll (15) and a feed roll (16). The strands (20) that are fed are cut. The reference numeral (19) is adapted to feed the pellets cut by the guide guide located below. As shown in FIG. 7, the rotary blade (2
The part (1) is shown in which the blade mold (22) is fixed by silver brazing (23).

[0008]

Since the present invention is configured as described above, the rotary cutting roll main body can be manufactured by partially replacing the cutting edge die even if one edge is broken or separated. There is an effect that only the cutting edge die of the damaged edge can be replaced and used. And, unlike the conventional rotary cutting roll, there is no need to replace a new cutting roll, and there is an excellent effect that it is very economical. Further, in the rotary cutting roll main body, by alternately forming the protrusions and the concave fitting portions in the longitudinal direction in the lateral direction of the outer periphery, the cutting blade die and the fixed body can be reliably and easily formed with respect to the concave fitting portion. There is an effect that can be fitted. Further, the fixed body is provided with several bolt holes, and the fixing bolt can be rotatably screwed into the bolt holes, so that the fixed body can be easily detached, and the cutting blade die is damaged and unusable. There is an excellent and practical effect that replacement work is extremely easy. Furthermore, the fixed body does not need to be replaced as a component, and repairing can be performed only with a cutting blade type, which has an economical effect that it can be reused sufficiently.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a pelletizer using the present invention.

FIG. 2 is a side view in which the rotary cutting roll of the present invention is partially cut away.

FIG. 3 is a vertical sectional front view in which a rotary cutting roll is also partially cut away.

FIG. 4 is a perspective view of the entire fixed body of the present invention.

FIG. 5 is an overall perspective view of the cutting blade die of the present invention.

FIG. 6 is an enlarged partial cutaway side view of the rotary cutting roll of the present invention.

FIG. 7 is a cross-sectional view showing a part of a conventional rotary cutting roll to which silver brazing is applied, with a part thereof cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating cutting roll main body 2 Projection part 3 Recessed fitting part 5 Fixed body 6 Cutting blade type 7 Fixing bolt 9 Outer peripheral part 11 Rotating shaft 14 Cutting edge 20 Strand 23 Silver brazing part

Claims (1)

[Claims] 1. A rotary cutting roll main body (1) for cutting out a strand to be delivered in a pelletizer is formed by alternately forming longitudinal protrusions (2) and concave fitting portions (3) in a lateral direction of an outer periphery, A longitudinal fixing body (5) and a cutting blade die (6) are fitted inside the concave fitting portion (3), and several bolt holes (12) ( 12) is provided, and fixing bolts (7) are provided in the bolt holes (12) (12).
(7) A rotary cutting roll for a spare blade of a pelletizer, wherein the rotary cutting roll is detachably screwed.