JPH05245905A - Extruder - Google Patents

Abstract

PURPOSE:To enable an extruder to be operated smoothly even where the electric power condition is poor such as no power source, frequent power stoppage owing to unstable electrical power, etc. CONSTITUTION:An extruder is obtained wherein a metering pump 18 is provided between a resin outlet 11a of an extruder 11 and a molding die; besides, an AC generator 14 which generates both electric power for driving the metering pump 18 and electric power for heating a resin material, and a diesel engine 13 which drives the extruder 11 and the AC generator 14 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruder for producing resin products such as films and sheets.

[0002]

2. Description of the Related Art FIG. 2 is a system diagram showing a block diagram of a conventional extruder, in which an extruder 1 drives a screw (not shown) by an electric motor 2 and a solid resin raw material is introduced from a hopper 3. The foreign matter in the molten resin is plasticized and melted in the extruder 1, filtered by the filter 5, extruded from the molding die 4, and a product such as a film or sheet is molded by a molding device (not shown) downstream. If there is an adapter 9 or a filter 5 that connects the extruder 1 and the molding die 4, a resin pressure automatic adjustment 6 is provided on the adapter 9 that connects the extruder 1 and the filter 5.

[0003]

In the above-mentioned conventional extrusion apparatus, the electric motor 2 is used as the power for driving the extruder. Therefore, even in a remote area where electric power cannot be obtained or even in the vicinity of the city, a cooling machine or the like is used. Due to the increase in peak load due to the increase in electric power, it is often impossible or impossible to operate the extruder in areas where there are many blackouts. In addition, driving by an electric motor causes high engine cost. There was a problem.

[0004]

Therefore, the present invention provides an extruder, a metering pump provided between a resin outlet of the extruder and a molding die, and an electric power for driving the metering pump. It also comprises an AC generator that generates electric power for heating the resin material, and a diesel engine that drives the extruder and the AC generator, and this is a means for solving the problems. It is a thing.

[0005]

[Operation] An extruder and an AC generator having a capacity necessary for heating and controlling a resin material are driven by a diesel engine, and in order to remove a bad influence on a resin product due to a small fluctuation of an output peculiar to the diesel engine, the same extruder is used. This is solved by providing a metering pump with high flow rate accuracy between the resin outlet of the machine and the molding die to keep the flow rate constant. In addition, instead of a large-capacity drive motor, it is directly driven by a diesel engine to eliminate energy loss such as rotational energy → electricity conversion → power transmission → rotational energy conversion. That is, when the clutch between the extruder and the diesel engine is disengaged and the diesel engine is started, the AC generator energizes the heater in the extruder to plasticize and melt the raw material resin fed from the hopper. Next, when the clutch is engaged, the screw in the extruder rotates, and the plasticized and melted resin raw material is extruded from the molding die through the metering pump and sent to the downstream molding device. If the metering pump is driven by a synchronous motor and the synchronous motor is rotated at a constant speed by an inverter, even if there is a small fluctuation in the output that is unavoidable in a diesel engine, the amount of resin The flow rate is constant and does not affect the quality of resin products.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments of the drawings. FIG. 1 shows an embodiment of the present invention in which a diesel engine 13 is connected to an extruder 11 via a clutch 12. The AC generator 14 is connected. When the clutch 12 is disengaged and the diesel engine 13 is started, the electricity generated by the AC generator 14 is sent to the heater (not shown) in the extruder 11 through the electric wire 16 through the control panel 15, and the electricity is generated from the hopper 17. The charged solid resin raw material is plasticized and melted. The AC generator is an AC generator (alternator), and rectifies the AC by a diode and outputs it. Compared to DC generators, AC generators have superior durability because they do not have commutators, have no radio interference, and have features such as a simple regulator. In addition, 11a is an extruder resin outlet, 18 is a metering pump, 19 is a molding die, 20 is a synchronous motor, and 21 is an inverter. When the clutch 12 is engaged here, a screw (not shown) in the extruder 11 is rotated and the molten resin is passed through the metering pump 18 to the molding die 19
The product is extruded from the above and supplied to a molding device (not shown) to produce products such as films and sheets. Metering pump 18
From the AC generator 14 through the control panel 15 to the inverter 2
Since it is driven by the synchronous motor 20 that is rotated by a current controlled to a constant frequency by 1, the resin flow rate is kept constant with high precision, and even if there is a small fluctuation in output that cannot be avoided with a diesel engine The adverse effects of can be removed.

[0007]

As described in detail above, according to the present invention, the metering pump for extruding the resin from the molding die is driven by the AC generator, and the extruder and the AC generator are driven by the diesel engine. , Where the power supply situation is bad (where there is no power supply, power is unstable and there are many blackouts, etc.)
However, it can be used and the energy cost can be reduced. If the metering pump is driven by a synchronous motor, and the synchronous motor is rotated at a constant speed by an inverter, even if there is a small fluctuation in the output that cannot be avoided in a diesel engine, the amount of resin The flow rate is constant and does not affect the quality of resin products.

[Brief description of drawings]

FIG. 1 is a system diagram showing a block diagram of an extrusion apparatus according to an embodiment of the present invention.

FIG. 2 is a system diagram showing a block diagram of a conventional extrusion device.

[Explanation of symbols]

 11 Extruder 11a Extruder Resin Outlet 12 Clutch 13 Diesel Engine 14 AC Generator 15 Control Panel 16 Electric Wire 17 Hopper 18 Metering Pump 19 Molding Die 20 Synchronous Motor 21 Inverter

Claims (1)

[Claims] 1. An extruder, a metering pump provided between a resin outlet of the extruder and a molding die, an electric power for driving the extruder, and an electric power for heating a resin material. An extruding device comprising: an AC generator that generates a gas, and a diesel engine that drives the extruder and the AC generator.