JPH06262665A - Replacing method for extruder - Google Patents

Abstract

PURPOSE:To enhance productivity by shortening the time of production preparing work and to enhance the protection of environment by providing a truck to one or more extruder equipped with an extruder main body, a motor and a transmission and preparing a preparatory extruder fitted with a truck having the same structure on a preparatory extruder yard to replace the same along with the truck. CONSTITUTION:An extruder main body and a motor fitted with a transmission are connected by a coupling to be coaxially fixed on a stand and wheels are attached to the stand to constitute an extruder fitted with wheels as a whole. When the replacement of a raw material or the replacement of a color is performed on a production line on which an extruder A1 is arranged, if a production speed is same, the extruder A1 is replaced with an extruder I and, if the production speed is desired to be changed, the extruder A1 is moved along moving lines E, F along with a truck to be replaced with the desired extruder among extruders II-IV. In the production line where the extruder is replaced, the extruder is connected to front and rear machineries to immediately start production.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of exchanging an extruder suitable for extrusion production of various kinds of plastics using a limited extruder.

[0002]

2. Description of the Related Art Generally, in the production of plastics using an extruder, once one type of product has been produced, it is indispensable to clean the extruder to maintain quality by changing raw materials or colors. It is said that while extruding the raw material used for the next production, it replaces the previous raw material remaining in the extruder, pulls out the screw from the extruder at the manufacturing site to remove the plastics adhering to the screw, and also cleans the inside of the cylinder. It was

[0003]

In the conventional method as described above, since the cleaning operation is performed while the apparatus is installed at the manufacturing site, the manufacturing is stopped during that time, and the extruder is changed even if the manufacturing amount is changed. There is a problem in that the discharge amount is fixed, and there is a problem that a waiting time is required until the manufacturing is completed when the extruder having the desired manufacturing amount is in use.

[0004]

SUMMARY OF THE INVENTION In the present invention, the above problems are solved by means of replacing the entire extruder or the entire extruder body.

That is, in a plastics extrusion facility in which a large number of extruders are arranged, at least one extruder having an extruder main body, a motor, and a transmission is provided with a trolley, while a spare with a trolley having the same configuration is provided. Extruder replacement method characterized by preparing one or more extruders in the preliminary extruder storage area and exchanging both machines with the trolley, or in a plastics extrusion facility in which multiple extruders are arranged. The method for exchanging an extruder is characterized in that only the extruder main body excluding the motor and the transmission of the extruder is replaced with the preliminary extruder main body.

A large number of extruders usually means five or more, but there is no particular limitation, and the point is that the number of extruders economically attracts from the standpoint of work efficiency even if a preliminary extruder is owned.

The means for attaching the extruder to the trolley is essentially such that the necessary number of wheels may be attached to the pedestal on which the motor, the transmission, and the extruder main body are set, or the pedestal can be mounted on a trolley made separately. Is also good.

Although all the extruders operating in a steady state are provided with a trolley, the degree of freedom in responding to changes in the manufacturing system is large. For example, half or one-third of all extruders are provided with a trolley. Is also good.

As for the number of preliminary extruders with a trolley, it is advisable to have a required number of models having a discharge amount according to the manufacturing plan. For example, if most extruders with a screw diameter of 25 mm are used in the industry, one or a few extruders with a screw diameter of 25 mm and one or two extruders with a screw diameter of 40 mm or 35 mm to cope with the increase in production volume. Good to have.

As a moving means of the extruder, a rail may be laid between the preliminary extruder storage area (which is also a cleaning work area) and each extruder installation position and the rail may be moved thereover, or a towing vehicle or the like. You may move it simply on the floor. Of course, the extruder installed in the field is naturally fixed by a suitable means.

The replacement of only the extruder body may be performed by hoisting with an overhead crane, or by using a forklift or a tow truck.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of an extruder with a trolley.

FIG. 2 is a movement explanatory view for a method of replacing the extruder with a trolley.

In FIG. 1, generally, in an extruder, an extruder main body (1) and a transmission motor (2) are connected by a coupling (4), which are coaxially fixed on a pedestal (3). Has been done. A car (5) is attached to the gantry (3), and an extruder with a trolley (100) is configured as a whole. Further, the pedestal (3) is provided with fixing means (6) for fixing the extruder at a fixed position so that the extruder does not move during operation. In FIG. 2, an area (A) is the whole of the plastics extrusion equipment, and an area (B) is a storage area for a trolley-equipped pre-extruder which is cleaned after being replaced.

In the area (A), extruders (A1) to (A)
N) are arranged. Further, extruders (I) to (IV) are placed in the area (B).

In this embodiment, extruders (A1) (A2)
(I) is an extruder having a screw diameter of 40 mm, extruders (A3), (A4) and (II) are 30 mm in diameter, and the extruder (III) is
And the extruder (A5) and thereafter are extruders having a screw with a diameter of 25 mm. The extruder (IV) has a screw diameter of 50.
mm extruder.

When raw materials or colors are changed in a production line in which the extruder (A1) is arranged, the extruder (I) is used if the production speed (production amount) is the same, and the extruder (I) is used if the production speed is desired to be changed. Among II) to (IV), the truck is moved along with the desired extruder and the movement lines (E) and (F) to be replaced. In the production line where the extruder is replaced, the extruder is connected to the front and rear devices, and production is immediately started.

When only the extruder body (1) is replaced,
After releasing the connection of the coupling (4) and the fixing to the pedestal (3), the extruder body (1) is lifted by a crane or a forklift with the hook (7) and replaced with a spare machine.

[0019]

According to the method of exchanging the extruder of the present invention, the manufacturing preparatory work for changing the color, which normally takes 4 to 8 hours, is performed in one step.
Since it is shortened to ~ 3 hours, productivity is improved, and cleaning work at the production line site is eliminated, thus improving environmental protection.

Further, by selecting the model of the preliminary extruder, the discharge amount, etc., it is possible to flexibly respond to the change in the model and the production amount of the raw material plastics when manufacturing the plastics.

[Brief description of drawings]

FIG. 1 is a side view of an extruder with a trolley used in the present invention.

FIG. 2 is a movement explanatory diagram for a method of replacing an extruder with a trolley.

[Explanation of symbols]

 100 ... Extruder with trolley 1 ... Extruder main body 2 ... Motor with irregular machine 3 ... Frame 4 ... Coupling 5 ... Car 6 ... Fixing means 7 ... Hook A1-AN ... Extruder I-IV ... Extruder A, B ... Area

Claims (2)

[Claims] 1. In a plastics extrusion facility having a large number of extruders, at least one extruder having an extruder main body, a motor, and a transmission is provided with a trolley, and a spare with a trolley having the same configuration. A method of exchanging extruders, characterized in that one or a plurality of extruders are prepared in a spare extruder storage area, and both the machines are exchanged together with the trolley. 2. In a plastics extrusion facility in which a large number of extruders are arranged, only the extruder main body excluding the motors and transmissions of the arranged extruders is replaced with a preliminary extruder main body. Replacement method.