JPH04267108A - Granulator for thermoplastic material - Google Patents

Abstract

PURPOSE:To prepare operation simply and safely by fixing a support shaft parallel with a cutter shaft, at a front end of which a cutter arranged on the front of a die plate is installed, and rotatably supporting a water casing to the support shaft at the position of retreat in a free proceeding and retreating manner to a die holder. CONSTITUTION:A granulator 1 for manufacturing pellets made of a thermoplastic synthetic resin is installed in a portable manner to a molten-material extruding section 21, a die holder 2 and a die plate 3 connected to the extruding section 21 are fixed to a truck 22 in a lower section, and a water chamber casing 4, a cutter 5, a cutter shaft 6, a motor 23, etc., are mounted to an upper section. The cutter 5 is disposed adjacently onto the front of the die plate 3 at that time, and a cutter shaft 6, at a front end of which the cutter 5 is set up, is supported rotatably to the water chamber casing 4, and rotated by the motor 23 through a belt 30, etc. Guide plates 32 supporting the water chamber casing 4 fastened to a connector 31 supporting the motor 23 are supported rotatably in an axial movable manner to a support shaft 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic granulating apparatus for cutting and granulating a molten material into pellets.

0002

2. Description of the Related Art For example, an apparatus for granulating thermoplastic synthetic resins is disclosed in Japanese Utility Model Publication No. 57-42662. As shown in FIG. 3, in this first prior art, a die plate 3 is fixed to a die holder 2, a water chamber casing 4 is detachably fixed via bolts, and a cutter 5 is arranged on the front side of the die plate 3. A cutter shaft 6 with the cutter 5 attached to its tip is rotatably supported on the water chamber casing 4 side.

A drive casing 11 is fixed to the water chamber casing 4, and a bearing housing 12 that supports the cutter shaft 6 via a bearing is disposed within the drive casing 11 so as to be movable in the axial direction. An air cylinder 13 allows the cutter shaft 6 to freely move forward and backward toward the die plate 3 by a distance L through a bearing housing 12.

Further, a worm wheel 14 is disposed within the drive casing 11 to set the position of the tip of the bearing housing 12. Fine adjustment of axis 6, i.e. die plate 3
The distance between the cutter 5 and the cutter 5 can be finely adjusted in units of 1/100 mm.

Preparation for operation in the first prior art involves retracting the cutter 5 with the air cylinder 13, opening the window 17 of the water chamber casing 4, and flowing the molten material from the die hole 3A of the die plate 3 to perform the cleaning action and the die. The holes 3A are filled and the surface of the die plate 3 is cleaned. Most of these operations are performed by inserting hands or a jig through the window 17 of the water chamber casing 4.

Further, as a second prior art, there is one disclosed in Japanese Patent Application Laid-Open No. 60-212305 shown in FIG. This second prior art has a vertical shape to prevent the die hole 3A from sagging after filling, and allows the cutter shaft 6 to be moved over a long stroke using one air cylinder 18. Preparation for operation is performed by inserting a hand or a jig through the window of the water chamber casing 4, as in the first prior art.

[0007]

[Problems to be Solved by the Invention] In both of the above-mentioned conventional techniques, preparation for operation must be carried out by inserting the hand or a jig through the window of the water chamber casing 4, resulting in poor workability and the problem that the hand cannot be placed in the cutter 5. There was a high risk of being hit. The present invention allows the water chamber casing, cutter, cutter shaft, etc. to be pulled away from the die plate in the axial direction and retracted laterally, thereby making it possible to expose the die plate and making preparation for operation easier and safer. It is an object of the present invention to provide a thermoplastic granulation device that enables the granulation of thermoplastics.

[0008]

[Means for Solving the Problems] A specific means for solving the problems in the present invention is to fix a die plate to a die holder and detachably fix a water chamber casing, arrange a cutter in front of the die plate, In a thermoplastic granulation device in which a cutter shaft with this cutter attached to the tip is rotatably supported on the water chamber casing side, a support shaft parallel to the cutter shaft is fixed to the die holder, and the water chamber casing is attached to this support shaft. is supported so that it can move forward and backward with respect to the die holder and can rotate freely in the retreated position.

[0009]

[Operation] When the swing bolt 25 fixing the water chamber casing 4 to the die holder 2 is released and the water chamber casing 4 is separated, and the water chamber casing 4 is moved in the axial direction on the support shaft 7, the cutter 5 and the cutter shaft 6 is the die holder 2
retreat from. The support shaft 7 with the water chamber casing 4 in the retracted position
When the die holder 2 is rotated, the die holder 2 is exposed and ready for operation in this state.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, numeral 1 is a vertical type thermoplastic granulation device for producing pellets of thermoplastic synthetic resin, and is a portable type that can be carried in and out of the molten material extrusion section 21 of a kneading extruder or gear pump. It has become.

The thermoplastic granulating device 1 is divided into upper and lower parts, and the lower part has a movable truck 22, and a die holder 2 and a die plate 3 that are fixed to the truck 22 and connected to the extrusion section 21. The upper part has a water chamber casing 4, a cutter 5, a cutter shaft 6, a motor 23, etc. A large number of die holes 3A are bored in the die plate 3 and communicate with the extrusion part 21 via the flow path 24 of the die holder 2.

The water chamber casing 4 surrounds the die plate 3 and cutter 5, and is detachably fixed to the die holder 2 via a swing bolt 25. The water chamber casing 4 is formed with an inlet 26 for introducing water or hot water into the interior, and an outlet 27 for discharging water and pellets, and the drive casing 11 is fixed or integrally molded above the inlet 26 .

The cutter 5 is arranged close to the front surface (upper side) of the die plate 3, and a cutter shaft 6 with the cutter 5 attached to its tip is rotatably supported by the water chamber casing 4. Although not shown in detail, similarly to the first prior art, a bearing housing, a worm wheel, and a worm shaft are provided in the drive casing 11, and the cutter shaft 6 is rotatably supported by the bearing housing via the bearing. Although the bearing housing is not provided with an air cylinder that moves over a long stroke, fine axial movement adjustment is possible using a worm wheel and a worm shaft, and the handle 28 is used for rotating the worm shaft.

Power from a motor 23 can be transmitted to the cutter shaft 6 via a winding transmission means 30 such as a belt, and the drive casing 11 and the motor 23 are connected to a connecting body 31.
are connected. The connecting body 31 has two guide plates 32.
is fixed to the guide plate 32, and the guide plate 32 is supported by the support shaft 7 so as to be movable in the axial direction and rotatable. The support shaft 7 is erected on the trolley 22 in parallel with the cutter shaft 6, and also serves as a mounting for the die holder 2, and support plates 33 and 34 are rotatably fitted in the middle and upper portions of the support shaft 7. , midway support plate 3
3, the lower limit position is set by a collar (or shaft large diameter portion) 35. A guide rod 36 parallel to the support shaft 7 is attached to the two support plates 33 and 34, and guides the two guide plates 32.

A lift jack 37 is provided between the intermediate support plate 33 and the lower guide plate 32.
7, the connecting body 31 can be moved up and down in the axial direction, that is,
A water chamber casing 4, a cutter 5, a cutter shaft 6, etc. are movable forward and backward relative to the die holder 2. Water chamber casing 4
etc., when rotated around the support shaft 7 from a state separated from the die plate 3, the connecting body 31, the guide plate 32, the support plate 33
, 34, the guide rod 36, the lift jack 37, etc. rotate integrally.

The water chamber casing 4, cutter shaft 6, etc. of the upper structure and the motor 23 are located at positions displaced by 180 degrees around the support shaft 7, as shown in FIG. 2, so that the weight balance is maintained as much as possible. It is set to be stable and these 9
When the water chamber casing 4 is rotated by 0 degrees, the water chamber casing 4 and the like are retracted from the operation position A to the side to become the operation preparation position B, and the die plate 3 below is opened to be exposed. When the upper surface of the die plate 3 is exposed, preparatory work such as cleaning and filling can be performed while viewing it from above.

In the embodiment described above, the die holder 2 is fixed to the trolley 22 and the water chamber casing 4 is pivotable via the support shaft 7, so that the water chamber casing 4 can be rotated by moving slightly backward. The die plate 3 can be opened, maintaining high precision between the die holder 2, the die plate 3, and the water chamber casing 4, and there is no need to provide an air cylinder on the driving case 11, which reduces the height of the device. can be kept low.

It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways. For example, although the thermoplastic granulation device 1 is vertical, it may be horizontal or the motor 2 may be
3 can be provided on an extension of the cutter shaft 6, or can be applied to melted materials such as foods.

[0019]

[Effects of the Invention] According to the present invention described in detail above, a support shaft parallel to the cutter shaft is fixed to the die holder, and the water chamber casing can be freely moved forward and backward with respect to the die holder and rotated at the retreated position on this support shaft. Since the water chamber casing, the cutter, and the cutter shaft can be pulled away from the die plate in the axial direction and retracted laterally, the die plate is exposed and can be used for cleaning, filling, etc. This makes it easier and safer to prepare for operation.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of the present invention.

FIG. 2 is an explanatory plan view showing a retracting operation.

FIG. 3 is a sectional view of the first prior art.

FIG. 4 is a sectional view of a second prior art.

[Explanation of symbols]

1 Thermoplastic granulation equipment 2 Die holder 3 Die plate 4 Water chamber casing 5 Cutter 6 Cutter axis 7 Support shaft A　Operating position B　Position when preparing for operation

Claims (1)

[Claims] Claim 1: A die plate is fixed to a die holder, and a water chamber casing is detachably fixed, a cutter is arranged in front of the die plate, and a cutter shaft with the cutter attached to the tip is rotated toward the water chamber casing. In the freely supported thermoplastic granulation device, a support shaft parallel to the cutter shaft is fixed to the die holder, and the water chamber casing is supported on the support shaft so as to be able to move forward and backward with respect to the die holder and to be rotatable in a retreat position. A thermoplastic granulation device characterized by: