JPH0327719Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a mold cooling water temperature controller installed in a die casting machine, a plastic injection molding machine, etc.

[Conventional technology]

In die casting, mold casting, plastic injection molding, etc. that use molds, stably maintaining the temperature of the mold within an appropriate range is key to maintaining product quality, reducing defective products, and increasing productivity. is an essential factor for the improvement of

In other words, if the mold temperature is low, water wrinkles (water pattern) will occur or filling defects will occur, and if the mold temperature is high, seizures, galling, etc. will occur, and the solidification time will become longer, reducing productivity. For example, in aluminum die casting, cooling water passages are drilled into the mold to cool the mold.
Currently, water as a cooling medium is passed through this cooling water passage, and the amount of water flowing through the mold is adjusted by manually opening and closing a valve, thereby stably maintaining a desired mold temperature.

[The problem that the idea attempts to solve]

However, the pressure of the water used as a cooling medium used to cool the mold is not necessarily constant, and the water temperature also changes depending on the temperature, season, etc., so the mold cooling water must be adjusted accordingly. It is extremely difficult to adjust and control the water flow rate by manual valve operation. Furthermore, when remanufacturing the same product at a later date, it is impossible to adjust and control the amount of water flow in consideration of water pressure and water temperature in order to maintain both molds at the same mold temperature, which may impair reproducibility. There are problems such as chipping.

This idea was devised to solve the above-mentioned conventional problems, and its purpose is to maintain a nearly constant water temperature regardless of changes in cooling water pressure, water flow rate, or water temperature, and to maintain a reproducible water temperature. Not only can the control be performed, but it can also be equipped with a plurality of cassette controllers incorporating temperature-sensing valve bodies of desired sensing temperatures, and by using these cassette controllers selectively or in appropriate combinations. The temperature of the mold cooling water can be automatically controlled to an appropriate temperature suitable for mold cooling, and the cassette controller is an attachment type, making it easier to replace the controller and detect when the temperature sensing valve body breaks down. It is an object of the present invention to provide a mold cooling water temperature controller with high practical value, which allows replacement with other cassette controllers having different temperatures easily and quickly at the site where the controller is used.

[Means to solve the problem]

In order to achieve the above object, the mold cooling water temperature controller of this invention is used by being connected to a cooling water outlet of a mold having a cooling water passage, and is designed to be used by connecting to a cooling water outlet of a mold having a cooling water passage. A cassette holder having a plurality of opening cassette installation holes and a mold discharge cooling water inlet and drainage port opening in each cassette installation hole, and a cassette holder that is removably inserted into each cassette installation hole of this cassette holder. a plurality of attachment type cassette controllers, and controller fixing means for removably fixing each of the cassette controllers to the cassette holder, and each cassette controller incorporated in the cassette holder is , a controller body which has a water passage chamber communicating with the water inlet and drain port of the cassette holder, and which is seal-fitted into each cassette installation hole of the holder; It is characterized by comprising a temperature-sensing valve body at a desired sensing temperature that opens and closes by sensing the temperature of the mold cooling water introduced from the water port.

[Effect]

The cooling water introduced into the cooling water passage of the mold is
The water is heated by heat exchange during mold cooling and drained from the mold outlet, but by connecting the cooling water temperature controller of this invention to the cooling water outlet side of the mold, the following can be achieved. play an action.

In other words, if the connecting pipe on the mold cooling water outlet side is connected to the valve body built-in controller with the desired sensing temperature, if the temperature of the mold discharge cooling water becomes higher than the sensing temperature of the water connection valve body. Then, the temperature sensing valve body automatically opens and the mold cooling water is passed to the holder drain port side, thereby cooling the mold. When the temperature of the mold cooling water drops below the valve body sensing temperature, the temperature sensing valve body automatically closes, cutting off the flow of mold cooling water to the holder drain port side, and preventing the mold from flowing. This will prevent excessive cooling.

Therefore, if the temperature sensing valve element of the cassette controller connected to the mold cooling water outlet side is set to a desired sensing temperature, for example, a valve element that senses and operates at 40°C, the temperature of the mold cooling water can be adjusted to the temperature of the mold cooling water. Appropriate temperature for example 40℃
The mold temperature can be automatically controlled to maintain stable mold temperature.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. FIG. 5 shows a front view of a mold having a cooling water passage, and this mold K has a cavity C corresponding to a molded product, an inlet A for cooling water W as a cooling medium, and a cooling water passage B. and a cooling water outlet D,
A mold cooling water temperature controller E of the present invention, which automatically controls the temperature of the mold discharge cooling water, is connected to the cooling water outlet D via a connecting pipe F made of a rubber hose so that water can flow therethrough.

That is, since the mold K is heated by conductive heat (heat input) from the molding material press-fitted into the cavity C, a cooling water passage B is provided at an appropriate position of the mold K to cool the mold by passing water through it. A mold cooling water temperature controller E is connected to this cooling water outlet D as shown in FIG. 5 to maintain stable mold temperature.

The controller E that is the object of the present invention is equipped with a rectangular metal cassette holder 1, and the cassette holder 1 has a plurality of openings in the upper end surface of the holder, which are recessed at regular intervals in the length direction. Cassette installation hole 2 consisting of, for example, five circular holes with a bottom.
6, five water inlets 2a to 6a drilled from the front side of the holder so as to open at the inner bottom of each of the cassette mounting holes 2 to 6, and the upper circumferential side of each of the cassette mounting holes 2 to 6. Five drainage ports 2b to 6b are drilled from the rear side of the holder to open at the same positions.
and is provided.

Reference numerals 12 to 16 denote attachment type cassette controllers that are removably fitted into the cassette installation holes 2 to 6 of the cassette holder 1, and each of the cassette controllers 12 to 16 is fixed to the cassette holder 1. It is removably fixed by means 7.

The controller fixing means 7 includes a pivot fitting 8 which is screwed onto the upper surface of the cassette holder 1 at the front side of the cassette installation holes 2 to 6, and a pin 9 that is attached to the pivot fitting 8 so that it can be opened and closed. Each supported cassette controller 12
- 16 from above, and a fixing bolt 11 that tightens and fixes the tip of the fixing bar 10 to the cassette holder 1.

Each of the cassette controllers 12 to 16 incorporated in the cassette holder 1
The controller has a water flow chamber 17 communicating with the water inlet ports 2a to 6a and the drain ports 2b to 6b, and is fitted into each of the cassette installation holes 2 to 6 of the holder 1 while being sealed with O rings 18 and 19. A main body 20, a temperature sensing valve body 21 that is installed in the water flow chamber 17 of the controller main body 20 and opens and closes by sensing the temperature of the mold cooling water introduced from the holder water inlets 2a to 6a; It is comprised of a valve body retaining ring 22 that presses and fixes the sensing valve body 21 in a predetermined position within the cassette installation holes 2 to 6.

This valve body retaining ring 22 is used to press and fix the temperature sensing valve body 21 to the hole stepped portion 17a by the tightening action of the main body cover plate 23, and has a cutout portion 22a that matches the main body drain hole 27, which will be described later, as shown in FIG. has. The controller main body 20 is equipped with a cover plate 23 that is sealed with an O-ring 24 and fastened with bolts 25, and the water flow chamber 17 that is closed by the main body cover plate 23 is provided with water through a water introduction hole 26 at the bottom of the hole. It communicates with the holder water inlets 2a to 6a, and the drain hole 27 on the upper part of the main body and the outer peripheral groove 2.
8 to the holder drain ports 2b to 6b.

The temperature sensing valve body 21 incorporated in the cassette controllers 12 to 16 is connected to the five cassette controllers 12 to 16.
When 16 are arbitrarily selected and used, different sensing temperatures are applied for each controller. For example, the temperature sensing valve body 21a incorporated in the first cassette controller 12 is a heat-sensitive valve that operates at a sensing temperature of 40°C, and the temperature sensing valve body 21b incorporated in the second cassette controller 13 operates at a sensing temperature of 50°C. The temperature sensing valve body 21c incorporated in the third cassette controller 14 operates at a temperature of 60°C.
This is a heat-sensitive valve that operates at a temperature detected by the temperature sensing valve body 2 that is incorporated into the fourth cassette controller 15.
1d is a heat-sensitive valve that operates at a sensing temperature of 70°C, and a temperature-sensing valve element 21e incorporated in the fifth cassette controller 16 is a heat-sensitive valve that operates at a sensing temperature of 80°C. Sensing valve body 21, 2
Each of the configurations 1a to 21e includes a wax 32 having a high coefficient of thermal expansion inside the temperature sensing portion 31 of the valve body 30.
When the sensing part 31 is heated to a predetermined temperature by the introduced cooling water, the piston 33 rises due to the expansion of the wax 32, causing the valve 34 to move upward against the valve closing force of the spring 35. The valve is configured to be opened by being pushed up to a protruding state.

A small water passage hole 36 is provided in the top plate portion of the valve 34 that is pressed against the valve seat portion of the main body of the valve 34, so that the temperature of the mold cooling water does not reach a predetermined temperature.
4 is in the closed state, the small hole 3
By constantly passing a small amount of cooling water through 6, it is possible to detect when the temperature of the cooling water inside the mold rises to a predetermined temperature. Further, when the temperature of the cooling water becomes lower than a predetermined temperature, the spring 35 acts on the sensing portion 3.
When the wax 32 in the valve 1 contracts, it functions to return the valve 34 to its original closed state in response to the contraction.

Therefore, the connecting pipe F on the side of the mold cooling water outlet D is connected to the holder water inlet 2a of the cassette controller 12 incorporating the temperature sensing valve body 21a that senses a desired sensing temperature, for example, 40°C. In this case, when the temperature of the mold discharge cooling water becomes higher than the temperature sensed by the water connection valve element 21a, the valve element 21a automatically opens and the mold cooling water flows to the holder drain port 2b. The mold is cooled by passing water to the side.

Further, when the temperature of the mold cooling water decreases below the valve body sensing temperature due to the opening of the valve, the valve body 21
The valve a automatically closes, and the flow of mold cooling water to the holder drain port 2b is cut off, thereby preventing excessive cooling of the mold K. Therefore, if the temperature sensing valve body 21 connected to the mold cooling water outlet side is set to a desired sensing temperature, for example, the valve body 21a that senses and operates at 40°C, the temperature of the mold cooling water becomes suitable for mold cooling. It is possible to automatically control the temperature to an appropriate temperature, for example around 40℃, and maintain stable mold temperature.

In the above embodiment, five cassette controllers 12 to 16 with different sensing temperatures are arbitrarily selected and used. If a cooling water passage B is provided, the cassette controllers 12-16 may be used in combination with a desired sensing temperature. In this case, the combination is, for example, 40℃, 40℃, 50℃, 60℃, 60℃, or if there are three cooling water passages B, 40℃, 50℃.
℃, 50℃, etc. In this way, the temperature of the mold discharge cooling water can be changed for each water passage, and the temperature can be automatically controlled to an appropriate temperature suitable for mold cooling.

[Effect of idea]

Since the mold cooling water temperature controller of this invention has the above-mentioned configuration, it always maintains a substantially constant water temperature regardless of changes in mold cooling water pressure, water flow rate, or water temperature, and has excellent reproducibility. Water temperature can be controlled to a certain extent. That is, by providing a plurality of cassette controllers incorporating temperature-sensing valve bodies having a desired sensing temperature, the connecting pipe on the mold cooling water outlet side can be connected to the valve body-embedding controller having a desired sensing temperature. Therefore, the temperature of the mold cooling water can be automatically controlled to an appropriate temperature suitable for mold cooling.

Moreover, by making the cassette controller an attachment type, it is possible to replace the controller in the event that the temperature sensing valve breaks down, or to reassemble it with another cassette controller with a different sensing temperature, at the site where the controller is used. It has excellent practical effects such as being easy and quick to perform.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of essential parts of a mold cooling water temperature controller according to an embodiment of the present invention, Figure 2 is a plan view of the same temperature controller, and Figure 3 is a longitudinal cross-section taken along the - line in Figure 2. 4 is a front view of the cassette controller incorporated into the cassette holder, and FIG. 5 is an explanatory diagram of the usage state in which the mold cooling water temperature controller of the present invention is connected to the cooling water outlet side of the mold. It is. K...Mold, B...Cooling water passage, D...Cooling water outlet, E...Mold cooling water temperature controller of the present invention, F...Connecting pipe, 1...Cassette holder, 2-6...Cassette assembly hole, 7 ... Controller fixing means, 8... Pivot fitting,
9... Pivot pin, 10... Fixing bar, 11... Fixing bolt, 12-16... Cassette controller, 17... Water passage chamber, 20... Controller main body, 21, 21a-21e...
Temperature sensing valve body, 22... Valve body holding ring, 23... Body cover plate, 30... Valve body, 31... Temperature sensing section, 32
...Wax, 33...Piston, 34...Valve, 3
5... Spring for biasing valve opening/closing.

Claims (1)

[Scope of utility model registration request] A mold cooling water temperature controller for controlling the mold temperature to an appropriate temperature, which is used by connecting to the cooling water outlet of a mold having a cooling water passage, and has multiple cassettes opened at the end face of the holder. A cassette holder having an assembly hole and a mold discharge cooling water inlet and a drain opening opened in each cassette assembly hole, and a plurality of attachments that are removably fitted into each cassette assembly hole of this cassette holder. and a controller fixing means for removably fixing each of the cassette controllers to the cassette holder, each cassette controller incorporated in the cassette holder being connected to the water inlet of the cassette holder. and a controller body which has a water passage chamber communicating with the drain port and is seal-fitted into each cassette installation hole of the holder; A mold cooling water temperature controller comprising a temperature sensing valve element having a desired sensing temperature that opens and closes by sensing the temperature of the mold cooling water.