JPS581213A - Temperature controller - Google Patents

Abstract

PURPOSE:To remarkably reduce amount of heater power consumption, through the on/off control of a main switch and contacts of subswitch in response to the set temperature characteristics, by connecting a parallel circuit of a power rectifier and a subswitch contact for a heater. CONSTITUTION:In a temperature controller 7, at the start of operation of an extruder 5, all contacts of main and subswitches MC1-MC7, MC1A, MC1B- MC7A, and MC7B are closed to supply power to heater elements H1A, H1B- H7A, and H7B by 100%, and when the temperature of a cylinder 2 exceeds the set temperature of temperature regulators TC1-TC7, the contacts MC1A, MC1B- MC7A and MC7B are opened. Thus, with the power application to the heater element H1A, H1B-H7A and H7B, 50% power application for both positive and negative half waves, the on/off control of the contacts MC1-MC7 is performed with normal temperature regulators TC1-TC7. Thus, the power consumption of heaters can be reduced remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the temperature control of resin extrusion molding machines, injection molding machines, and various equipment in chemical and fiber plants, etc.

Conventionally, in resin molding machines such as extrusion molding machines and injection molding machines, changes in the external shape and wall thickness of the molded product have been used in order to maintain a constant finished state, including the surface shape of the molded product. Although it varies depending on the resin mm, etc., if the molded product is a gear that requires particularly strong mechanical strength, the molding temperature can vary within 4 hours from the set temperature, for example, about ±2°C, which is extremely high! In order to keep the quality of the molded product constant even when there is a wide range of molding temperatures, it is preferable to multiply the temperature fluctuation range by the set temperature. In order to increase the rate, it is necessary to increase the temperature quickly, so to control the temperature of a resin molding machine, a large capacity heater and cooling fan are generally turned on and off frequently. As a result, heat loss due to fan cooling is extremely large, and a considerable amount of electricity is consumed during resin molding.

As a countermeasure to this problem, for example, there is a method of phase controlling the DC power supply, but in this case, the price of the 80H for phase control is extremely high due to the large capacity of the DC motor, and moreover, it is also difficult to control the trigger of the SCR. Although this requires a considerable amount of cost and the price of the equipment has increased significantly, the temperature control characteristics have not been improved as much as expected.The purpose of the present invention is to simplify the structure, make it easier, and significantly improve the temperature control characteristics. An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional temperature control device by providing a temperature control device that can significantly reduce power consumption in a state where the temperature control device is turned on.

Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.

*A nine-bellet-shaped resin is supplied into the cylinder 2 by the collar 1, and is attached to the outer shoulder of the vyda 2 and connected to the ninth band! In the extrusion molding machine 5, the heated and melted resin in the cylinder 2 is extruded and supplied into the metal 4 by 50 revolutions of the screw by the basket MK, and the resin is heated and melted by H1 to H7. A two-split pandohy installed with the area divided into 7 zones! H1~H
7 left and right platters each and -! Element H1A, H1B
~H7 people tH7Ba, each connected in parallel for each zone and connected to the power supply ACK via the contacts M01 to MC7 of the main switch, and each connected in parallel with one element) HlA, HlB,... , H7, H2N and power rectifiers DiA, DlB xp7, D7
B and sub switch contact MC1, MC1B -MC7A
, Connect the parallel circuits with MC7B, connect the power rectifier D1, D1B~D7mu, and D7B□ in different directions for each parallel circuit, and connect the contacts MC1~ of each switch.
MC7, MC1A, MCjB ~ MC7 people, MC7B are settings from omniscient temperature controllers TC1 ~ TC7 that input outputs corresponding to the V cylinder 2 temperature from humidity sensors No. 81 ~ S7 for each zone of cylinder 2. It is controlled on and off via the V-sensor 6 depending on the temperature.

Next, Hon IJ! The functions and effects of the embodiment will be explained.

In nine temperature control devices 7 configured in this way.

All contacts M01 to MO7%M at the start of operation of the extrusion molding machine 5
C1, MCIB ~ MC7A, MC7B 1/KL Te each one 7z letter 3/) HlA, JB ~ H7, H2
When N is 100% energized and %V cylinder 1 degree covers the set temperature of temperature controllers T01 to TC7, open/open M II is connected A MCjA, MC1B,...
MC7A, MC7B wo17K and one each! With HIA, HIB Nl2m and H2N energized at 50% energization in the positive half wave and 50% energization in the negative half wave, the main switch contacts MC1 to MC7 are controlled by normal temperature controllers T01 to TC7. When on/off control is performed and the *experimental results are compared with the conventional on/off control with -7100% energization, in this example it is like the 3rd ffi11'J, whereas in the conventional case it is 11 !311 Sho like the dotted line, and-! Comparing only the power consumption, this example requires only 3 degrees of power compared to the conventional one. 3-4 compared to 7℃
℃, the temperature control characteristics are greatly improved, and the ffi degree fluctuation pitch is extremely long, about 10 minutes instead of about 2 minutes conventionally, and the lifespan of each electrical component such as contacts MC1 to M07 is reduced by that amount. Not only can the fan be made longer, but the number of times the fan must be operated is also extremely small.

In addition, in this embodiment, the power consumption in each positive and negative half-wave of the supply power is balanced by rounding for each zone and one! Divide each of H1 to H7 into two parts and apply half-wave energization to each positive and negative half-wave.If you ignore the balance of the negative capacity for each positive and negative half-wave, you can directly energize each zone by half-wave and -/H1 to H7. You can also do that.

Next, the effects of the present invention will be explained.

The first activation is performed by turning on the contact of the main switch connected in series with the temperature-controlled stop-heating and -I in accordance with the detected temperature of the temperature-controlled object detected via the temperature sensor. When performing fist-off control, connect a parallel circuit of the power rectifier and the contact of the sub-switch in series with the heater, and set the contacts of the main switch and the sub-switch in advance. The temperature control device is controlled to turn on and off according to the temperature control characteristics.

As a result, the present invention has the advantage of being able to simplify the structure, reduce the packaging, and significantly improve the temperature control characteristics, while significantly reducing -IO power consumption.

next%#! The invention of Book 2 H turns on and off the contacts of a main switch connected in series with a part of the temperature-controlled body in accordance with the detected temperature of the temperature-controlled body detected via a temperature sensor.
When performing OFF control, the above-mentioned to-ta is divided into two with approximately the same power capacity, and each of the divided and-! A parallel circuit of the power rectifier and the contacts of the sub-switch is connected in series with the contacts of the main switch and the sub-switch, and the direction of the power rectifier sIO is made highly anisotropic. There is a temperature control device that has preset contact points and performs on/off control in accordance with the temperature control characteristics of the temperature controlled object.

As a result, the present invention has the same effect as the first invention, and has the effect of being able to balance the load of each half of the staff.

[Brief explanation of the drawing]

1aa is an explanatory diagram including an electric circuit according to an embodiment of the present invention;
21I is a partially enlarged schematic explanatory diagram including the power Ill supply waveform, and FIG. 5 is a diagram of its operating characteristics. ■1~H7...Heater D1 person, DlB-, D7A, D7B...Power rectifier H1 person, H1B, -, H7A, H7B...Heater element MC1~MC7, MC1A, vC1BNMC7A
, MC7B , Contact patent applicant Toshin Electric Industry Co., Ltd. Representative Patent Attorney Hidehiko Okada Procedural amendment (edit) Patent issued on July 20, 1945 Haruki Shimada 1, Indication of case Showa year 00 Application Relationship with Incident No. 1σ-〇-2
Patent applicant 4, agent 5, date of amendment order

Claims (1)

[Claims] (1) When controlling the contact point of the main switch which is connected in series with the heater for heating the temperature controlled object in accordance with the detected temperature of the temperature controlled object detected through the temperature control circuit, the above-mentioned A parallel circuit of a power rectifier and a contact of the switch is connected in series with the heater, and the contact of the main switch and the contact of the switch are set in advance. A temperature control device that performs on/off control according to the temperature. (When controlling the contact point of the main switch which is connected in series with the heater for heating the temperature controlled object, on/off according to the detected temperature of the temperature controlled object detected via the temperature sensor,
Divide the 1tlli3 heater into two with the same power capacity, and connect the power rectifier, switch contact, and 011I 1-row circuit in series with each divided heater.
When the power rectifiers are oriented in opposite directions, the main switching contacts and the switching switch contacts are set in advance and turned on and off in accordance with the temperature control characteristics of the temperature controlled body.
A temperature control device characterized by an off-control temperature.