JP3210285B2 - Method and apparatus for preventing deaeration clogging of extruder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for preventing clogging of a deaeration port of an extruder, and more particularly, to a deaeration method by inserting a twin screw type screw into a deaeration port provided on a side of a cylinder. The present invention relates to a novel improvement for completely removing resin, volatile matter, and liquid matter coming out of the mouth to the knockout drum side.

[0002]

2. Description of the Related Art An apparatus for preventing clogging of a deaeration port of an extruder of this kind which has been generally used is shown in FIG. That is, what is denoted by reference numeral 1 in FIG.
A cylinder having a pair of screws 3 and 4 rotatably provided in the screw receiving hole 2, and a vent port 6 having a deaeration pipe 5 is provided at an upper portion of the cylinder 1. Therefore, the screws 3 and 4 are rotated to melt and knead the resin, and the plasticized resin is volatilized from the resin when being conveyed to the die (not shown) by the screws 3 and 4. The minute or liquid matter is degassed to the outside through the vent port 6 and the degassing pipe 5 installed at an angle. In addition, a device in which the twin-screw type twin-screw screw is configured vertically is
It is disclosed in JP-A-2-18413 and JP-B-6-15170. In the configuration shown in FIG. 4, a dehydrating slit 1A is provided in the cylinder 1, and the dehydrating slit 1A
It was configured to dehydrate from A to the outside.

[0003]

The conventional device for preventing deaeration and clogging of an extruder is constituted as described above.
The following issues existed. That is, since the vent port is provided in the upper part of the cylinder in any of the above-mentioned conventional configurations, when the resin as a raw material contains an additive or a volatile component, the volatile component degassed to the vent port side, etc. However, various components solidified or liquefied due to cooling have returned to the plasticized resin being conveyed or clogged the deaeration port. In addition, a resin such as a lens that requires high transparency has caused a defective product. In addition, when entrainment occurs, the scattered resin adheres and grows on the inner wall of the vent port and the deaeration port, sometimes blocking the deaeration tube, and sometimes deaeration becomes impossible. Further, in the case of a configuration in which the dewatering slit is provided in the cylinder as in the conventional configuration of FIG. 4, the dewatering slit is clogged, and it is necessary to frequently clean the dewatering slit, thereby lowering the working efficiency.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in particular, is to insert a self-cleaning twin-screw screw having a high self-cleaning property into a deaeration port provided in a cylinder side portion. A method of preventing clogging of the deaeration port of an extruder, in which a resin, a solid substance, or a liquid substance coming out of the deaeration port is scraped off and a deaeration port is secured so that volatile components are completely deaerated to a knockout drum side. It is intended to provide a device.

[0005]

According to the present invention, there is provided a method for preventing clogging of a deaeration port of an extruder according to the present invention.
In the extruder which kneads and melts and transports the raw material by means of the second screw and performs degassing or dewatering from a degassing opening formed in the cylinder, the extruder is located above the cylinder and above each of the screws. Position the cylinder (1)
The first and second kami-mating type twin-screw screws are provided in different screw directions from both ends of a deaeration port which is formed horizontally through the both sides of the screw and perpendicular to the longitudinal direction of the screws. The first and second cam-engaged twin-screw insert the raw materials into the respective screw sides by rotating the respective cam-engaged twin-screw by motors provided at the both ends. It is a method of performing degassing or dewatering in a state where each outer end of the mating type twin screw protrudes into each knockout drum, and the first and second screws provided in the cylinder are used to feed the raw material. In the extruder that kneaded and melted and transported, and to perform deaeration or dewatering from a deaeration port formed in the cylinder,
In the upper part of the cylinder and above each screw, penetrates both sides of the cylinder, and penetrates horizontally through a deaeration port formed in a direction perpendicular to the longitudinal direction of each screw. First, the first and second screw portions are inserted, and the first and second screw portions are rotated by inserting the first and second screw portions by rotating the first and second screw portions with a motor provided only at one end. A method in which the raw material is pushed into each of the screw sides, and degassing or dewatering is performed in a state where each outer end of the screw-type twin-screw protrudes into each knockout drum. In addition, the apparatus for preventing clogging of the deaeration port of the extruder according to the present invention kneads and melts and transports the raw material by the first and second screws provided in the cylinder, and removes the material from the deaeration port formed in the cylinder. In an extruder that performs gas or dewatering,
An air vent that is located above the cylinder and above each screw and penetrates both sides of the cylinder and is formed horizontally at right angles to the longitudinal direction of each screw, and from both sides of the air vent. First and second screw-type twin-screw inserted in different screw directions and independent from each other, motors provided at both ends of each screw-type twin-screw, and first and second screw-type screws First and second knockout drums, which are provided on each end side of the outside of the twin screw and are connected to both sides of the deaeration port and serve as tanks for storing solids or liquids, wherein the first and second knockout drums are provided. Each outer end of the cam screw type twin screw is protruded into each of the knockout drums, and the raw material is pushed into the respective screw sides by the first and second cam screw type twin screw. 2-axis twin type The structure is such that degassing or dewatering is performed from both outer ends of the screw. Also, the first and second screws provided in the cylinder knead and melt and transport the raw material, and the degassing formed in the cylinder. In an extruder configured to perform degassing or dewatering from a vent, the extruder is positioned above the cylinder and above each screw, penetrates both sides of the cylinder, and is orthogonal to the longitudinal direction of each screw. A screw-type twin-screw integrally having a horizontally formed deaeration port, first and second screw portions inserted through the deaeration port and having different screw directions, and Motors provided only at one end of the screw, and first and second motors provided outside the first and second screw portions and connected to both sides of the deaeration port and serving as tanks for storing solids or liquids. Knockout dora Wherein the outer ends of the first and second screw portions project into the respective knockout drums, and the first and second screw portions push the raw material into the respective screw sides, thereby forming the first and second screw portions. It is configured to perform degassing or dewatering from both outer ends of the mold twin-screw.The knockout drum can be heated or cooled, and the stored solid or liquid can be removed through a lower valve. This is the configuration.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method and an apparatus for preventing deaeration clogging of an extruder according to the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example will be described using the same reference numerals. 1 is a pair of first and second screw receiving holes 2 in a screw receiving hole 2.
A cylinder having screws 3 and 4 rotatably. A deaeration port 10 is formed in the upper part of the cylinder 1 in a state perpendicular to the longitudinal direction of the screws 3 and 4 and in a horizontal state. Knockout drums 6, 6A having deaeration tubes 5, 5A and valves 11, 11A are provided on both sides of the deaeration port 10.
Are connected via a pipe-shaped deaeration line 12,
The deaeration line 12 has a high self-cleaning property and has a pair of independent first and second screw directions different from each other.
Cami fitting type twin screw 13, 13A is rotatably penetrated and installed therein.
3A is rotated by a pair of motors 14 and 14A provided outside knockout drums 6 and 6A forming tanks for storing solids or liquids discharged from the deaeration port 10. In addition, each outer end 1 of each screw-type twin screw 13, 13A.
3C and 13D protrude into the respective knockout drums 6 and 6A.

Therefore, in the above configuration, the cylinder 1
The resin, which is a raw material supplied into the inside, is melted, kneaded and transported by the screws 3 and 4 to be plasticized, and during the plasticization, when the screw-type twin-screw 13 and 13A are rotated, the respective screws are rotated. Fitting twin screw 13, 13A
As a result, the molten resin coming out of the degassing line 12 is pushed inward, so that volatile components and the like desorb from the knockout drums 6, 6A through the respective flights of the screw-type twin-screw 13, 13A. The trachea 5 and 5A are evacuated. Since the volatile components are exhausted after passing between the flights of the screws 13 and 13A, the gas flow rate between them increases, and
Liquefaction is low. In addition, even if volatile components are solidified, each self-cleaning twin-screw 1 has high self-cleaning properties.
The high-speed gas scraped off by the screws 3 and 13A flows between the screws, and is removed to the knockout drum side. Even if the volatile matter is liquefied, if the liquefaction viscosity is as low as water, it is removed together with the gas to the knockout drum side. In this deaeration process, since the deaeration port 10 is provided in the upper part of the cylinder 1, all volatile components are deaerated to the outside, and do not drop onto the molten resin in the cylinder 1.

The configuration shown in FIG. 2 is substantially the same as that of FIG.
A is integrated into one, and the structure is a kami-engagement type twin screw 13 integrally having first and second screw portions 13a and 13b having different screw directions, and is rotated by one motor 14 provided on one end side thereof. By this, each screw part 13a,
Reference numeral 13b denotes each of the screw-type twin-screw 13, 13 shown in FIG.
The same action as A can be obtained. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Also,
The knockout drum 6 or 6A has a lower valve 6a.
Is provided so that solid or liquid matter accumulated inside through the lower valve 6a can be removed to the outside.

[0009]

The method and the apparatus for preventing deaeration of an extruder according to the present invention are configured as described above, so that the following effects can be obtained. In other words, since the deaeration screw is provided in the deaeration port located at the top of the cylinder and above each screw and orthogonal to the longitudinal direction of each screw, the resin and volatiles etc. that have risen from the cylinder vent It is scraped off by the deaeration screw and transported to the high-speed gas passing between the screw-type twin-screw with wide self-cleaning property and removed to the knockout drum side. The same applies to a viscous liquid such as water. Unlike in the conventional case, there is no clogging of the deaeration port and no dripping in the cylinder, the quality of the molten resin is prevented from deteriorating, and the yield of product recovery can be improved. Further, since each outer end of the screw for deaeration protrudes into the knockout drum, components and the like at the time of deaeration are completely collected in the knockout drum.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a method and an apparatus for preventing deaeration clogging of an extruder according to the present invention.

FIG. 2 is a configuration diagram showing another embodiment of FIG. 1;

FIG. 3 is a configuration diagram showing a conventional deaeration clogging prevention device for an extruder.

FIG. 4 is a configuration diagram of a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 1A Side part 3,4 1st, 2nd screw 6,6A Knockout drum 6a Lower valve 10 Deaeration port 13 Kami engagement type twin screw 13A Kami engagement type twin screw 13a, 13b First and second screw parts 14, 14A Motor 13C, 13D Outer end

Claims (5)

(57) [Claims] 1. A first and a second cylinder provided in a cylinder (1).
In an extruder configured to perform kneading, melting and transporting of the raw materials by screws (3, 4) and to perform degassing or dewatering from a degassing port (10) formed in the cylinder (1), the cylinder ( 10) and above each screw (3, 4), penetrates both sides (1A) of the cylinder (1), and is horizontal to the longitudinal direction of each screw (3, 4). First and second cam-engaged twin-screw screws (13, 13A) having different screw directions and independent from both ends of a deaeration port (10) formed in
, And each of the cam screw type twin-screw (13, 13A) is rotated by the motor (14, 14A) provided at the both ends, and the first and second cam screw type twin-screw (13 , 13A), the raw material is pushed into each screw (3, 4) side, and each outer end (13C, 13D) of the screw-type twin screw (13, 13A) is in each knockout drum (6, 6A). A method for preventing clogging of a deaeration port of an extruder, wherein deaeration or dehydration is performed in a state where the deaeration or dewatering is performed while protruding from the extruder. 2. First and second cylinders provided in a cylinder (1).
In an extruder configured to perform kneading, melting and transporting of the raw materials by screws (3, 4) and to perform degassing or dewatering from a degassing port (10) formed in the cylinder (1), the cylinder ( It is located at the upper part of 1) and above each screw (3, 4), penetrates both sides (1A) of the cylinder (1), and is horizontal to the longitudinal direction of each screw (3, 4). And a screw-type twin-screw (13) integrally having first and second screw portions (13a, 13b) having different screw directions through the deaeration port (10) formed at one end thereof. Motor provided only in
(14) rotate the screw-type twin-screw (13), the first and second screw parts (13a, 13b) push the raw material to the respective screw (3, 4) side, Degassing or degassing of an extruder characterized in that degassing or dewatering is performed with each outer end (13C, 13D) of the mold twin screw (13) projecting into each knockout drum (6, 6A). How to prevent clogging. 3. A first and a second cylinder provided in a cylinder (1).
In an extruder configured to perform kneading, melting and transporting of the raw materials by screws (3, 4) and to perform degassing or dewatering from a degassing port (10) formed in the cylinder (1), the cylinder ( It is located at the upper part of 1) and above each screw (3, 4), penetrates both sides (1A) of the cylinder (1), and is horizontal to the longitudinal direction of each screw (3, 4). A deaeration port (10) formed in the first and second screw-type twin screw (13, 13A) inserted from both sides of the deaeration port (10) in different screw directions and independent from each other, Motors (14, 14A) provided at both ends of each of the cam screw type twin screw (13, 13A), and outer ends of the first and second cam screw type screw (13, 13A). First and second knockout drums (6, 6A) forming tanks for storing solids or liquids connected to both sides of the deaeration port (10) provided on the unit side, and the first and second knockout drums are provided. Mosquito Each outer end (13C, 13D) of the mating type twin screw (13, 13A) protrudes into each of the knockout drums (6, 6A), and the first and second camming type twin screw ( 13, 13A), the raw material is pushed into each of the screws (3, 4), and both outer ends (13C, 13D) of the first and second cam-fitting twin-screw (13, 13A).
A deaeration / clogging prevention device for an extruder, which performs deaeration or dewatering from the side. 4. A first and a second cylinder provided in a cylinder (1).
In an extruder configured to perform kneading, melting and transporting of the raw materials by screws (3, 4) and to perform degassing or dewatering from a degassing port (10) formed in the cylinder (1), the cylinder ( It is located at the upper part of 1) and above each screw (3, 4), penetrates both sides (1A) of the cylinder (1), and is horizontal to the longitudinal direction of each screw (3, 4). And a first and second screw portions (13a, 13b) inserted through the deaeration port (10) and having different screw directions. A shaft screw (13), a motor (14) provided only on one end side of the screw-type twin-screw (13), and a motor provided outside the first and second screw portions (13a, 13b). First and second knockout drums (6, 6A) forming tanks for storing solids or liquids connected to both sides of the deaeration port (10);
3a, 13b) at the outer ends (13C, 13D)
(6, 6A), the first and second screw portions
(13a, 13b), the raw material is pushed into each screw (3, 4) side, and both outer ends (13C, 1
A degassing / clogging prevention device for an extruder, which performs degassing or dewatering from the 3D) side. 5. The knockout drum (6, 6A) can be heated or cooled, and the stored solid or liquid can be stored in a lower valve.
The device for preventing clogging of a degassing opening of an extruder according to claim 3 or 4, wherein the device is configured to be removable through (6a).