JPS6337079Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to improvements in pelletizers, particularly fixed blades of pelletizers that cooperate with rotating blades to cut plastic strands into pellets.

(Prior Art) Examples of conventional pelletizers include those shown in FIGS. 4 to 6. In FIG. 4, 1 is a pelletizer. The pelletizer 1 has a cylindrical rotary blade 2, and the rotary blade 2 is arranged so that its rotation axis 3 is horizontal, and cutting edges 4a, 4b, 4c are spaced at equal intervals in the circumferential direction and parallel to the rotation axis 3. have. A take-off roller 5 is provided in front of the rotary blade 2, and the take-off roller 5 is composed of an upper roller 5a and a lower roller 5b that are pressed against each other. A fixed blade 6 having a horizontal upper surface 6a is provided between the rotary blade 2 and the take-up roller 5. The upper edge 6b of the fixed blade 6 and the cutting edges 4a, 4b, and 4c of the rotary blade 2 constitute a cutter. A rotary blade 2 is mounted on the rear of the pelletizer 1 and a chute 9 is installed.
is provided.

When producing pellets 7 using the pelletizer 1, the strand of pellet 7 material, that is, the rod-shaped member 8, is sandwiched between the upper roller 5a and the lower roller 5b of the take-up roller 5, and is rolled over the upper surface 6a of the fixed blade 6. It is moved horizontally in the direction of the rotation axis 3 at a constant speed. Since the upper edge 6b of the fixed blade 6 and the cutting edges 4a, 4b, and 4c of the rotary blade 2 form a cutter, the strand 8 is cut to a fixed length by the rotation of the rotary blade 2 at a constant angular velocity, and the strand 8 is cut into a fixed length in the chute 9. pellets 7 are produced.

(Problems to be Solved by the Invention) Since the strand 8 usually has a constant length, the rear end portion 8a differs in length from the cut pellet 7 having a constant length. That is, the maximum length of the rear end 8a of the strand 8 is from the nipping point between the upper roller 5a and the lower roller 5b to the upper edge 6b of the fixed blade.
The length will be up to. For this reason, after the rear end portion 8a of the strand 8 passes the take-off roller 5, it cannot be moved further in the direction of the rotary blade 2. Furthermore, since the upper surface 6a of the fixed blade 6 is horizontal, the rear end portion 8a remains on the upper surface 6a of the fixed blade 6 (Figs. 5 and 6).
figure). The length of the rear end 8a is usually longer than the length of the pellet 7. This long rear end 8a may turn sideways due to the vibration of the pelletizer 1 and enter between the rotary blades 2, or may be accompanied by the strand 8 fed in later and enter the chute 9 from between the rotary blades 2. I feel tired. In this way, there is a problem in that the long rear end portion 8a mixes into the good pellets as a defective pellet 7a.

(Purpose of the invention) Therefore, the present invention prevents the rear end of the strand from remaining on the horizontal upper surface of the fixed blade when cutting the strand with a pelletizer to produce pellets. The purpose is to prevent the end part from entering the chute between the rotating blades and to manufacture an excellent product that does not contain defective pellets.

(Structure of the invention) The pelletizer according to the invention is arranged so that the axis of rotation is horizontal, and has rotating blades having cutting edges equidistant on the circumference and parallel to the axis of rotation, and a blade that is perpendicular to the axis of rotation of the rotary blade. a moving means for moving the rod-shaped member in the direction;
A fixed blade is provided between the moving means and the rotary blade, cooperates with the rotary blade to form a cutter, and has a horizontal upper surface on the rotary blade side and a downwardly inclined slope on the moving means side. It consists of being prepared.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 to 3 are diagrams showing embodiments of the pelletizer according to the present invention. In FIG. 1, 11 is a pelletizer. The pelletizer 11 has its rotating shaft 1
3 has a cylindrical rotary blade 12 arranged horizontally, and the rotary blade 12 has cutting edges 14 at equal intervals in the circumferential direction and parallel to the rotation axis 13 on the circumference of the rotary blade 12.
a, 14b, and 14c are formed. A take-off roller 15, which is a moving means, is provided in front of the pelletizer 11, and the take-off roller 15 is composed of an upper roller 15a and a lower roller 15b that are pressed against each other. A chute 16 is provided at the rear of the pelletizer 11 with a rotary blade 12 mounted thereon, and another chute 17 is provided in front of the chute 16. Take-off roller 15 and rotary blade 12
A fixed blade 18 is provided between the rear upper edge 18a of the fixed blade 18 and the cutting edge 14a of the rotary blade 12,
14b and 14c constitute a cutter. On the upper surface of the fixed blade 18, the front part (take-off roller 15 side) of the fixed blade 18 has a downwardly inclined slope 18b.
The rear part (rotary blade 12 side) forms a horizontal upper surface 18c. In FIG. 2, the width w of the inclined surface 18b from the front end to the rear end exceeds 1/2 of the total width W of the fixed blade 18 from the front end to the rear end.

When producing plastic pellets 19,
The strand 20, which is the material of the pellet 19, is sandwiched between the upper roller 15a and the lower roller 15b of the take-up roller 15, and the fixed blade 18 and the rotary blade 1
It is moved horizontally in two directions at a constant speed. The strand 20 is cut into pellets 19 of a fixed length by the rotating blade 12 and the fixed blade 18 that rotate at a constant angular velocity, and the cut pellets 19 are cut into the chute 1.
It is dropped into 6. After the rear end 20a of the strand 20 passes the take-up roller 15, it is not moved in the direction of the rotating blade 12 and is moved to the fixed blade 18.
remains on the upper surface of the However, this rear end 2
0a, as shown in FIG. 3, the front part of the fixed blade 18 has a downwardly inclined inclined surface 18b.
It falls naturally along this inclined surface 18b and is made to fall into the chute 17. Therefore, the long rear end portion 20a is not mixed into the chute 16, and high quality pellets including only good pellets can be produced.

(Effects of the invention) As explained above, according to the invention, when a strand is cut by a pelletizer to produce pellets, the fixed blade has a downwardly inclined surface at the front part, so that the strand is cut into pellets. The rear end does not remain on the horizontal upper surface of the fixed blade, and
By preventing the rear end portion, which is longer than the pellet, from entering the chute of good pellets, it is possible to produce excellent pellets without contamination with defective pellets.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a pelletizer according to an embodiment of the present invention, FIG. 2 is an enlarged plan view of the fixed blade and rotary blade in FIG. 1, and FIG. 3 is a side sectional view of the fixed blade in FIG. 1. 4 is a side sectional view of a conventional pelletizer, FIG. 5 is an enlarged plan view of a conventional fixed blade and a rotary blade, and FIG. 6 is a side sectional view of a conventional fixed blade. 11...Pelletizer, 12...Rotary blade, 13...
... Rotating shaft, 14a, 14b, 14c... Cutting edge, 1
5...Take-off roller, 18...Fixed blade, 18b
... Inclined surface, 18c ... Upper surface, 20 ... Strand (rod-shaped member).

Claims (1)

[Scope of utility model registration request] a rotary blade arranged so that the axis of rotation is horizontal, and having cutting edges equidistant on the circumference and parallel to the axis of rotation; a moving means for moving a rod-shaped member in a direction perpendicular to the axis of rotation of the rotary blade; A fixed blade is provided between the moving means and the rotary blade, cooperates with the rotary blade to form a cutter, and has a horizontal upper surface on the rotary blade side and a downwardly inclined slope on the moving means side. A pelletizer characterized by: