JP4293709B2 - Mold temperature controller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold temperature controller for molding a synthetic resin product.
[0002]
[Prior art]
The following is known as a conventional mold temperature controller.
One having a circulation system liquid chamber having a circulation system liquid inlet, a circulation system liquid outlet, and a cooling liquid inlet and a heater built in the circulation system liquid chamber is known.
[0003]
[Disadvantages of the prior art]
The mold temperature controller has the following drawbacks.
When adjusting the temperature of the circulatory system liquid, the cooling liquid was directly injected into the circulatory system liquid chamber, so the injected cooling liquid was not sufficiently mixed with the circulatory system liquid, and its cooling liquid density The part where the temperature is high often passes the position where the temperature sensor is provided, and the difference between the detected temperature of the part and the detected temperature of the other part becomes large, and as a result, it is difficult to control the temperature of the circulating liquid There were drawbacks.
[0004]
[Means for Solving the Problems]
The present invention employs the following means in order to eliminate the above disadvantages .
Invention 請 Motomeko 1 possess an outlet disposed upstream of the inlet and a temperature sensor, a circulation liquid chamber is partitioned Rutotomoni heater inlet side chamber and an outlet side chamber is built by the partition wall, this A cooling liquid chamber provided in close contact with the circulation system liquid chamber and connected to a liquid supply source for supplying a cooling liquid, and each of the inlet side chamber and the outlet side chamber. There Ru der what is communicated to the cooling liquid chamber via the communication hole.
[0005]
【The invention's effect】
The invention that Sosu the such effects following the configuration such above.
According to the invention 請 Motomeko 1, the cooling liquid is not adapted to be injected into the circulatory system the liquid chamber through the cooling liquid chamber and the communication hole, the circulation liquid cooling liquid is first a cooling liquid chamber As a result, the temperature difference between the circulation system liquid and the cooling liquid is reduced. In addition, since the heat exchanger cooling liquid reaches the circulation liquid chamber being dispersed and stirred through the communication hole, Ru is performed is sufficient mixing of the cooling liquid and circulation liquid. The cooling liquid is so fed by dispersing the inlet side chamber and an outlet side chamber, respectively, further thorough mixing of the cooling liquid and circulation liquid is carried out, thereby improving the temperature controllability.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
The temperature controller 1 has an inlet 2, an outlet 3, a drain outlet 9, a circulation system liquid chamber 5 in which a heater 4 is incorporated, and a circulation liquid inlet 5 provided in close contact with the circulation system liquid chamber 5. And a cooling liquid chamber 7 having 8.
[0007]
The circulation system liquid chamber 5 and the cooling liquid chamber 7 are communicated with each other through a plurality of communication holes 11a and 11b. The communication holes 11a are formed at a 45-degree interval on a virtual small circle drawn around the center line of the inlet 2 in the partition wall 12 that divides the circulation system liquid chamber 5 and the cooling liquid chamber 7, and the communication holes 11b Are formed on a virtual great circle (larger than the virtual small circle) drawn around the center line of the entrance 2 in the partition wall 12 at an interval of 45 degrees.
[0008]
The circulation system liquid chamber (columnar space centered on the center line of the inlet 2) is divided into an inlet side chamber 5a and an outlet side chamber 5b by a partition wall 15 (cylindrical one centered on the center line of the inlet 2). It is divided. The communication hole 11a opens to the inlet side chamber 5a, and the communication hole 11b opens to the outlet side chamber 5b.
In addition, a required number of openings 16 for communicating the inlet side chamber 5a and the outlet side chamber 5b are formed at the right end of the partition wall 15.
[0009]
The outlet 3 and the inlet of a resin molding die 18 having a liquid passage (not shown) are connected to each other through an outward conduit 21 having a liquid circulation pump 19 and a temperature sensor 20.
The outlet of the mold 18 and the inlet 2 are connected via a return conduit 22.
With such a configuration, the circulation system liquid chamber 5, the outward conduit 21, the mold 18, and the return conduit 22 constitute a liquid circulation path.
[0010]
A liquid supply source 24 for supplying a cooling liquid pressurized at a predetermined pressure is connected to the cooling liquid inlet 8 via a conduit 25 having an on-off valve 26 (including an electromagnetic on-off valve). Has been.
[0011]
A drainage pipe 28 having an opening / closing valve 29 (including an electromagnetic opening / closing valve) is connected to the drainage port 9 on the way.
[0012]
[Operation of temperature controller]
Next, the operation of the temperature controller 1 will be described.
When the cooling liquid is injected from the cooling liquid inlet 8, the cooling liquid is first heat-exchanged with the circulation system liquid in the cooling liquid chamber 7, and a part of the heat-exchanged liquid is dispersed and passed through the communication holes 11a. While being agitated, it reaches the inlet side chamber 5a, and the remaining part reaches the outlet side chamber 5b while being dispersed and agitated via the communication holes 11b. In this process, the cooling liquid is sufficiently mixed with the circulation system liquid.
As a result, the difference between the detected temperature of the portion where the cooling liquid and the circulating liquid are sufficiently mixed and the detected temperature of the other portion detected by the temperature sensor 20 is reduced, and as a result, the circulating liquid is reduced. It is easy to control the temperature.
[0013]
Note that the amount of the circulation system liquid corresponding to the amount of the injected cooling liquid is discharged from the drain port 9 by opening the on-off valve 29.
[0014]
[Variations]
A description will be given below of modifications and the like.
(1) The liquid is not limited to water, and may be oil or the like.
(2) If necessary, devices such as a check valve and an on-off valve are interposed in the necessary part.
[Brief description of the drawings]
FIG. 1 is a system diagram showing an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Temperature controller 2 Inlet 3 Outlet 4 Heater 5 Circulation system liquid chamber 5a Inlet side chamber 5b Outlet side chamber 7 Cooling liquid chamber 8 Cooling liquid inlet 9 Drain outlet 11a Communication hole 11b Communication hole

Claims (1)

Possess an outlet disposed upstream of the inlet and a temperature sensor, a circulation liquid chamber is Rutotomoni heater is divided into an inlet side chamber and an outlet side chamber is built by the partition wall,
A cooling liquid chamber provided in close contact with the circulation system liquid chamber and having a cooling liquid inlet connected to a liquid supply source for supplying the cooling liquid;
The inlet-side chamber and a temperature regulator for mold the outlet side chamber and each is communicated with the cooling fluid chamber through the communication hole.

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