JPH0324278Y2 - - 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, a cooling water passage is bored in the mold to cool the mold, and water as a cooling medium is passed through this cooling water passage. Currently, the desired mold temperature is maintained stably by adjusting the amount of water flowing through the mold by manually opening and closing a valve.

[The problem that the idea aims 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 operating a valve. Furthermore, when remanufacturing the same product at a later date, it is impossible and lacks reproducibility 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. There are other problems.

This device was devised to solve the above-mentioned conventional problems, and its purpose is to maintain a substantially 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 it be controlled, but it is also equipped with multiple temperature sensing valve bodies with different sensing temperatures, and the connecting pipe on the mold cooling water drain side can be connected to the water inlet of the passageway containing the valve body at the desired sensing temperature. It is an object of the present invention to provide a mold cooling water temperature controller which has high practical value and can automatically control the temperature of mold cooling water to an appropriate temperature suitable for mold cooling.

[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. The controller body has multiple water passages including cooling water inlets and drainage ports, and the temperature of the mold cooling water that is built into each of the water passages in the controller body and is introduced from the main body water inlets is sensed. The mold cooling water outlet is equipped with a plurality of temperature sensing valve bodies that open and close with different sensing temperatures, and the connecting pipe on the mold cooling water outlet side is connected to the valve body built-in passageway with the desired sensing temperature, and the mold cooling water is The temperature of the mold is controlled to an appropriate temperature suitable for mold cooling.

[Effect]

The cooling water introduced into the cooling water passage of the mold is
It is heated by heat exchange during mold cooling and drained from the mold outlet, but by connecting the cooling water temperature controller of the present invention to the cooling water outlet side of the mold,
It has the following effects.

That is, when the connecting pipe on the side of the mold cooling water outlet is connected to the valve element built-in passageway having the desired sensing temperature, if the temperature of the mold discharge cooling water becomes higher than the sensing temperature of the water passage connecting valve element, the above-mentioned The valve body automatically opens and mold cooling water is passed to the main body drain port side, thereby cooling the mold. When the temperature of the mold falls below the sensing temperature of the valve body, the valve body automatically closes, and the flow of mold cooling water to the main body drain port side is cut off, thereby preventing excessive cooling of the mold. It becomes like this.

Therefore, if the temperature sensing valve connected to the mold cooling water outlet side is selected to have a desired sensing temperature, for example, a valve that senses and operates at 40°C, the temperature of the mold cooling water can be adjusted to the temperature suitable for mold cooling. The mold temperature can be maintained stably by automatically controlling the temperature to an appropriate temperature, for example, around 40℃.

〔Example〕

Embodiments of this invention will be described below with reference to the drawings. FIG. 3 shows a front view of a mold having a cooling water passage. and has 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 through 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. 3 to keep the mold temperature stable.

The controller E that is the object of the present invention has a controller main body 10 made of a rectangular metal main body board 8.
and a metal fixing plate 9 which is fastened and fixed onto the main body panel 8 with a plurality of bolts 9a,
A plurality of, for example, four water passages 21 to 24 bent in a crank shape are formed in the main body plate 8 at regular intervals in the length direction of the main body plate 8. Each of the water passages 21 to 24 includes a stepped circular hole 11 drilled from the top surface of the main body panel 8, and a main body water inlet port bored from one side of the main body panel 8 and communicating with the inner bottom of the stepped circular hole 11. 12, and a main body drain port 13 that is bored from the other side of the main body panel 8 and communicates with the upper circumferential side of the stepped circular hole 11.
In the stepped circular hole 11 of No. 4, there are four temperature sensing valve bodies 31 with different sensing temperatures that open and close by sensing the temperature of the mold cooling water introduced from the main body water inlet 12.
- 34, and four valve body retaining rings 28 for crimping and fixing the respective temperature sensing valve bodies 31 to 34 in predetermined positions are incorporated. This valve body retaining ring 28 is for crimping and fixing each temperature sensing valve body 31 to 34 in the stepped circular hole 11 by the fastening action of the fixing plate 9, and has an outer peripheral notch communicating with the main body drain port 13. In case of failure of the temperature sensing valve bodies 31 to 34 or when replacing with another temperature sensing valve body with a different sensing temperature, loosen the bolts 9a, remove the fixing plate 9, and remove the valve body retaining ring 28. Therefore, the valve body 31~
34 can be easily replaced.

The first temperature-sensing valve body 31 is a heat-sensitive valve that operates at a sensing temperature of, for example, 40°C, and the second temperature-sensing valve body 32 is a heat-sensitive valve that operates at a sensing temperature of, for example, 50°C. Third temperature sensing valve body 33
is a heat-sensitive valve that operates at a sensing temperature of, for example, 60°C, and the fourth temperature-sensing valve body 34 is a heat-sensitive valve that operates at a sensing temperature of, for example, 70°C. The individual configuration of the valve body 3
Wax 37 having a high coefficient of thermal expansion is filled inside the temperature sensing portion 36 of No. 5, and when the sensing portion 36 is heated to a predetermined temperature by the introduced cooling water, the wax 37
As the piston 38 rises due to the expansion of the valve 39
is configured to resist the valve closing biasing force of the spring 40 and be pushed upward to an upper protruding state to open the valve.
A small water passage hole 39a is provided in the top plate portion of the valve 39 that is pressed against the valve seat of the main body of the valve 39, so that the temperature of the mold cooling water does not reach a predetermined temperature.
Even when the valve 9 is in the closed state, the small hole 3
By constantly passing a small amount of cooling water through 9a, it is possible to detect when the cooling water inside the mold rises to a predetermined temperature. Further, the spring 40
is for returning the valve 39 to its original state in response to the contraction when the temperature of the cooling water falls below a predetermined temperature and the wax 37 in the sensing section 36 contracts.

Therefore, the connecting pipe F on the side of the mold cooling water outlet D is connected to the water inlet 12 of the water passage 21 incorporating a desired temperature sensing valve element, for example, a temperature sensing valve element 31 capable of sensing 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 body 31, the valve body 31 automatically opens and the mold cooling water flows to the main body drain port. 13 side, the mold is cooled, and when the temperature of the mold cooling water drops below the valve body sensing temperature due to the valve opening water flow, the valve body 31 automatically closes. The valve is closed,
The flow of mold cooling water to the main body drain port 13 side is blocked, thereby preventing excessive cooling of the mold. Therefore, the temperature sensing valve bodies 31 to 34 connected to the mold cooling water outlet side are adjusted to a desired sensing temperature, for example.
By selecting the valve body 31 that senses and operates at 40°C, the temperature of the mold cooling water is automatically controlled to the appropriate temperature suitable for mold cooling, for example around 40°C, and the mold temperature is maintained stably. be able to. In addition, the mold K
If there are multiple cooling water passages B... that cool the mold by changing the cooling temperature for each part,
It is also possible to use the discharge side connection pipes F of each of the cooling water passages B by connecting them to each of the water passages 21 to 24 of the controller main body 10. In this case, the temperature of the mold discharge cooling water can be controlled by the route. It is possible to automatically control the temperature to the appropriate temperature suitable for mold cooling by changing the temperature at each time.

In the above embodiment, the controller main body 10 is composed of a rectangular main body panel 8 and a fixing plate 9 that is fastened onto the main body panel 8. The present invention is not limited to the embodiments described above, but may be constructed of, for example, a plurality of valve body assembly blocks divided into several parts and a main body frame that fits and holds each of the valve body assembly blocks in a joined state. In this case, the main body frame is provided with an openable and closable block fixing bar for fixing each valve body assembly block so that it can be rearranged. With such a main body configuration, the temperature sensing valve bodies 31 to 34 can be easily replaced with those with different sensing temperatures by cutting the valve body assembly block and replacing them without removing the main body fixing plate 9. Can be exchanged.

[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. By having multiple temperature-sensing valve bodies with different sensing temperatures, it is possible to connect the mold cooling water outlet side connecting pipe to the valve body built-in passageway with the desired sensing temperature. This has the effect of automatically controlling the temperature of the mold cooling water to the appropriate temperature suitable for mold cooling, eliminating all the problems that were previously caused by the operator's intuition, and improving reproducibility. It is possible to provide a mold cooling water temperature controller of high practical value that also enables certain numerical mold temperature control.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of essential parts of a mold cooling water temperature controller according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view taken along the - line of Fig. FIG. 2 is a schematic front view of a mold in which a mold cooling water temperature controller is connected to a cooling water outlet side. K...Mold, B...Cooling water passage, D...Cooling water outlet, E...Mold cooling water temperature controller of the present invention,
F...Connection pipe, 8...Main board, 9...Fixing plate, 1
0... Controller body, 11... Stepped circular hole, 12
...Body water inlet, 13...Body drain port, 21-2
4... Water passage, 28... Valve body holding ring, 31 ~
34... Temperature sensing valve body, 35... Valve body, 36...
...Temperature sensing section, 37... Wax, 38... Piston, 39... Valve, 40... Spring for biasing the valve to close.

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 connected to a cooling water outlet of a mold having a cooling water passage, and is used by connecting to a cooling water outlet of a mold having a cooling water passage. A controller body with multiple water passages including drainage ports, and a sensor built into each water passage of the controller body that opens and closes by sensing the temperature of the mold cooling water introduced from the main body water inlet. Equipped with a plurality of temperature sensing valve bodies having different temperatures,
The connecting pipe on the mold cooling water outlet side is connected to the water inlet of the valve body built-in water passage at the desired sensing temperature, so that the temperature of the mold cooling water is automatically controlled to an appropriate temperature suitable for mold cooling. A mold cooling water temperature controller characterized by: