JPS5932016A - Temperature controlling method of steam platen for press - Google Patents

Abstract

PURPOSE:To ensure an even temperature on the surface of a heat platen and at the same time to simplify the constitution of a using valve and flow path, by controlling the flow rate of a flow path coming back from the heat platen in response to the detecting result of temperature of the heat platen. CONSTITUTION:The flow rate is controlled for a flow path coming back from a heat platen in response to the detecting result of temperature of the heat platen. For instance, a liquid heat medium is supplied to a heat platen 2 for press from a boiler 4 of a heat medium feeder 1 via a pump 10 and a feed path 9. The heat medium with which the heat exchange is through on a heat exchange flow path 8 of the platen 2 is sent back to the boiler 4 through a return path 3 and via a variable throttle valve 11. The platen 2 is heated up by the circulation of the heat medium. The temperature of the platen 2 is detected by a temperature sensor 5 provided on the path 8, and the valve 11 is controlled by the result of temperature detection. Then the flow rate is controlled for the path 3, and therefore the temperatue of the platen 2 is kept approximately at a constant level.

Description

[Detailed Description of the Invention] Unexploded E94 relates to a temperature control method when heating a press heating plate with a liquid heating medium. The present invention relates to a technology for completely simplifying piping.

Conventionally, when heating a press heating plate by circulating a constant amount of liquid heating medium, the method of controlling the heating temperature is as follows: 4) The amount of mixture with the low-temperature heating medium extracted from the path (3)' is determined by the temperature δ determined by the temperature sensor (5)' installed in the path (2)'. If seven rollers were used in this way, there would be variations in the temperature of the heating plate, and it would be difficult to achieve uniform heating.Furthermore, as shown in Figure 1, the temperature of the heating medium would vary. Valve that controls the amount of a, low'
ML heat medium flow t? Stopping the supply of heat medium to the controlled valve and heat plate (2)'? There are problems such as the need for an electric #13-way valve (6)' consisting of a carefully designed valve, and the need for a bypass path (7)' from the return flow path (3)'.

The present invention was made in view of these problems, and
The purpose of this is to make it possible to equalize the temperature of the surface of the press heating plate by a simple improvement, and to improve the valve and flow path configuration of the press heating plate. There is a way to provide a system of degrees.

That is, the present invention provides heat transfer from the heating medium supply device tll to the heating plate (2).
In this heating heating method, a substantially constant flow L of heating medium is supplied throughout the circulation, and the flow rate of the return flow path +31 from the thermal evaporator (2) is adjusted based on the detection result of the heating medium 'IIa degrees. This is related to the temperature control method of the press heating plate, which is characterized by the temperature control method of the press heating plate.
′ as a path configuration? The method of the present invention will be described in detail below based on one embodiment of the method of the present invention, which can be simplified.

(4) The boiler as an example of the heat medium supply device (1) (
4), all of the heat medium of thermal steam t21 K liquid for press is supplied, and the heat medium is returned to the heat transfer boiler (4) where heat exchange has been completed in the heat exchange channel (8) in the heat exchanger panel (2). However, by circulating and supplying the heating medium in this manner, the bear plate (2) can be completely heated. A pump (lO) is provided in the supply path (9),
A constant heat medium? This allows for circulating supply. And the return flow path (3) (which is a two-way valve with variable number valve)
11j is provided, and this variable number valve (10 is linked to the total heating plate temperature detection sensor (5),
Based on the temperature detection result of IA degree detection sensor (5), 0
Jga throttle valve (1s'z ff1lJ # and return flow path (
The flow rate control in step 3) is carried out to keep the humidity of the board (2) almost constant.

In this way, since the flow rate in the return flow path 13) is fully controlled, it is possible to fill the heat exchange flow path (8) of the heat vapor f21 with the medium, and thereby the heat exchange flow path (8) of the heat vapor f21 is The tendency for hot spots and cold spots to occur can be completely suppressed, and uniform heating can be achieved. In this way, liquid heating medium? Use a large area of huban? Is there variation in the surface temperature of thermal vapor when heating or cooling? It is effective in reducing

In summary, the present invention is a method for controlling the flow rate of the return flow path from hot steam based on the detection results of constant temperature.
This has the advantage that the heating plate can be filled with 1fiL heat transfer medium, thereby completely suppressing fluctuations in temperature between the heating plates and achieving uniformity. Furthermore, since the return flow path is adjusted by the a-way, it is sufficient to simply provide a variable number valve in the return flow path, and there is an advantage that the configuration of the valve and the flow path configuration can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a heating system diagram of a conventional example, the second example is a constant heating system in which all methods of zero starting J are implemented, and Il) is a heating medium supply device,
(2) is thermal steaming, +31i-J: return flow path. Agent Patent Attorney Ro 1) Choshichi

Claims (1)

[Claims] IIj Is this a heating heating method in which a heating medium is completely circulated at a substantially constant flow rate from a heating medium supply device to a heating plate, and the flow rate in the return flow path from the heating plate is fully adjusted based on the detection result of the heating plate temperature?
Features a temperature control method for press heating plates.