Temperature control system for mold equipment

Abstract

This invention provides a temperature control system for a mold apparatus that can appropriately control the temperature in response to temperature changes in the mold. [Solution] A temperature control system 1 for a die-cast mold device that integrally molds the frame of a vehicle, wherein the opening degree adjustment unit 40 lowers the opening degree from the first refrigerant flow path 12 to the bypass flow path 18 until the flow rate detected by the flow rate detection unit 16 becomes the flow rate when the temperature of the mold 2 is at an appropriate value, when the temperature of the mold 2 detected by the thermograph 22 is above a first predetermined value, and raises the opening degree from the first refrigerant flow path 12 to the bypass flow path 18 until the flow rate detected by the flow rate detection unit 16 becomes the flow rate when the temperature of the mold 2 is at an appropriate value.

Description

Technical Field

[0001] The present disclosure relates to a temperature control system for a mold device.

Background Art

[0002] Patent Document 1 discloses a temperature control device for an injection mold that suppresses positional variations in the temperature inside the mold and the occurrence of temperature unevenness at specific locations, and also suppresses variations in the dimensional accuracy of molded products and variations in residual stress during molding.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the conventional temperature control of the mold only targeted the discharge temperature, it was not possible to appropriately control the temperature with respect to the temperature change of the mold.

[0005] The present disclosure has been made in view of the above points, and an object thereof is to provide a temperature adjustment system for a mold device capable of appropriately controlling the temperature with respect to the temperature change of the mold.

Means for Solving the Problems

[0006] A first aspect of this disclosure is a temperature control system for a die-casting mold device for integrally molding the frame of a vehicle, comprising: a temperature control unit that supplies a refrigerant to the mold to adjust the temperature of the mold; a first refrigerant flow path that flows the refrigerant from the temperature control unit to the mold; a second refrigerant flow path that flows the refrigerant from the mold to the temperature control unit; a bypass flow path that branches off from the first refrigerant flow path and flows the refrigerant to a reserve tank for storing the refrigerant; a flow rate detection unit that detects the flow rate of the refrigerant in the second refrigerant flow path; a temperature detection unit that detects the temperature of the mold; and the detection result of the flow rate detection unit and the temperature detection unit The device includes an opening adjustment unit that adjusts the opening from the first refrigerant flow path to the bypass flow path based on the detection results of the outlet unit, wherein the opening adjustment unit lowers the opening from the first refrigerant flow path to the bypass flow path until the flow rate detected by the flow rate detection unit becomes the flow rate when the mold temperature is at an appropriate value, when the temperature of the mold detected by the temperature detection unit is below a second predetermined value, and raises the opening from the first refrigerant flow path to the bypass flow path until the flow rate detected by the flow rate detection unit becomes the flow rate when the mold temperature is at an appropriate value. [Effects of the Invention]

[0007] According to this disclosure, it is possible to provide a temperature control system for a mold apparatus that can appropriately control the temperature in response to temperature changes in the mold by controlling not only the discharge temperature but also the flow rate of the refrigerant. [Brief explanation of the drawing]

[0008] [Figure 1] This figure shows a schematic configuration of a temperature control system for a die-casting mold apparatus according to an embodiment of the disclosed technology. [Modes for carrying out the invention]

[0009] Hereinafter, an example of an embodiment of this disclosure will be described with reference to the drawings. In each drawing, identical or equivalent components and parts are given the same reference numerals. Also, the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from the actual ratios.

[0010] Figure 1 is a schematic diagram showing the temperature control system of a die-casting mold apparatus according to this embodiment. The temperature control system 1 shown in Figure 1 is a system for adjusting the temperature of the mold 2. The mold 2 is a die-casting mold for integrally molding the frame of a vehicle. The temperature control system 1 includes a temperature control device 10, a first refrigerant flow path 12, a second refrigerant flow path 14, a flow rate detection unit 16, a bypass flow path 18, a bypass valve 20, a thermograph 22, a heat exchanger 24, a system water reservoir tank 26, a system water tank 30, pumps 28 and 32, and an opening adjustment unit 40.

[0011] The temperature control device 10 is a device that adjusts the temperature of the mold 2 by supplying a refrigerant such as water to the mold 2 through a first refrigerant flow path 12. The first refrigerant flow path 12 is a flow path for supplying refrigerant from the temperature control device 10 to the mold 2. The second refrigerant flow path 14 is a flow path for returning refrigerant from the mold 2 to the temperature control device 10. The flow rate detection unit 16 detects the flow rate of refrigerant flowing through the second refrigerant flow path 14. The bypass flow path 18 is a flow path for bypassing the refrigerant flowing through the first refrigerant flow path 12 to the temperature control device 10 via the system water reservoir tank 26 and the system water tank 30. The bypass valve 20 is a valve for adjusting the flow rate of refrigerant flowing from the first refrigerant flow path 12 to the bypass flow path 18. The thermograph 22 is an example of a temperature detection unit in this disclosure and detects the temperature of the mold 2. Note that a temperature detection device other than the thermograph 22 may be used as long as it can detect the temperature of the mold 2. The heat exchanger 24 cools the refrigerant flowing through the bypass flow path 18. The system water reservoir tank 26 temporarily stores the refrigerant cooled by the heat exchanger 24. The system water tank 30 temporarily stores the refrigerant. Pump 28 moves the refrigerant from the system water reservoir tank 26 to the system water tank 30. Pump 32 moves the refrigerant from the system water tank 30 to the temperature control device 10.

[0012] The opening degree adjustment unit 40 adjusts the opening degree of the bypass valve 20 based on the flow rate of the refrigerant flowing through the second refrigerant passage 14 detected by the flow rate detection unit 16 and the temperature of the mold 2 detected by the thermograph 22. Specifically, when the temperature of the mold 2 detected by the thermograph 22 is above a first predetermined value, the opening degree of the bypass valve 20 for flowing refrigerant from the first refrigerant passage 12 to the bypass passage 18 decreases until the flow rate detected by the flow rate detection unit 16 becomes the flow rate when the temperature of the mold 2 is at an appropriate value. Also, when the temperature of the mold 2 detected by the thermograph 22 is below a second predetermined value, which is lower than the first predetermined value, the opening degree of the bypass valve 20 for flowing refrigerant from the first refrigerant passage 12 to the bypass passage 18 decreases until the flow rate detected by the flow rate detection unit 16 becomes the flow rate when the temperature of the mold 2 is at an appropriate value.

[0013] For example, suppose the first predetermined value is 140°C and the second predetermined value is 100°C. If the temperature of the mold 2 detected by the thermograph 22 is 150°C, the opening adjustment unit 40 lowers the opening of the bypass valve 20 for flowing refrigerant from the first refrigerant flow path 12 to the bypass flow path 18 until the flow rate is the same as when the temperature of the mold 2 is between 100°C and 140°C. Also, if the temperature of the mold 2 detected by the thermograph 22 is 90°C, the opening adjustment unit 40 raises the opening of the bypass valve 20 for flowing refrigerant from the first refrigerant flow path 12 to the bypass flow path 18 until the flow rate is the same as when the temperature of the mold 2 is between 100°C and 140°C.

[0014] In other words, if the mold 2 is in a subcooled state, the opening degree of the bypass valve 20 is increased to increase the amount of refrigerant flowing from the first refrigerant passage 12 to the bypass passage 18 in order to raise the temperature of the mold 2. Conversely, if the mold 2 is in a superheated state, the opening degree of the bypass valve 20 is decreased to decrease the amount of refrigerant flowing from the first refrigerant passage 12 to the bypass passage 18 in order to lower the temperature of the mold 2.

[0015] The location of the mold 2 where the thermograph 22 detects temperature can be set arbitrarily. Furthermore, the location of the mold 2 where the thermograph 22 detects temperature is not limited to one location but may be multiple locations. In this case, the temperature control system may provide a coolant flow path within the mold 2 for each location to be controlled and control the temperature of the mold 2 at each location. When there are multiple locations in the mold 2 where temperature is detected, the opening degree adjustment unit 40 may adjust the opening degree of the bypass valve 20 depending on whether the temperature at at least one location is above or below a predetermined value.

[0016] For example, suppose there are two locations on the mold 2 where the thermograph 22 detects the temperature. If the temperature of the mold 2 is 150°C at one location and 120°C at the other, the opening adjustment unit 40 may lower the opening of the bypass valve 20 for flowing refrigerant from the first refrigerant flow path 12 to the bypass flow path 18 until the flow rate is the same as when the temperature of the mold 2 is between 100°C and 140°C, because there is a location where the temperature of the mold 2 is 150°C.

[0017] If the bypass channel 18 is not provided and the refrigerant is simply continuously flowed from the temperature control device 10 to the mold 2 through the first refrigerant channel 12, the temperature of the mold 2 will simply be left to chance, and the result of adjusting the temperature of the mold 2 will be dominated by the characteristics of the temperature control device 10 and the state of the mold 2. The temperature control system 1 according to this embodiment has the configuration shown in Figure 1, which allows the flow rate of the refrigerant flowing to the mold 2 to be adjusted according to the temperature of the mold 2. In other words, the temperature control system 1 according to this embodiment can appropriately adjust the temperature of the mold 2, rather than leaving the temperature of the mold 2 to chance, by adjusting the flow rate of the refrigerant flowing to the mold 2 according to the temperature of the mold 2.

[0018] The embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the technical scope of the present disclosure is not limited to such examples. The embodiments described above are exemplary and do not limit the technical scope of the present disclosure. It is obvious that those with ordinary knowledge in the technical field of the present disclosure can come up with various modification examples or correction examples within the scope of the technical idea described in the claims. Naturally, these modification examples or correction examples are also understood to belong to the technical scope of the present disclosure.

[0019] In addition, the effects described in the above embodiments are illustrative or exemplary and are not limited to those described in the above embodiments. That is, the technology according to the present disclosure may exhibit other effects that are obvious to those with ordinary knowledge in the technical field of the present disclosure from the description in the above embodiments, together with or instead of the effects described in the above embodiments.

Description of Reference Numerals

[0020] 1 Temperature adjustment system 2 Mold 10 Temperature adjustment device 12 First refrigerant flow path 14 Second refrigerant flow path 16 Flow rate detection unit 18 Bypass flow path 20 Bypass valve 22 Thermography 24 Heat exchanger 26 System water reservoir tank 28, 32 Pumps 30 System water tank 40 Opening adjustment unit

Claims

[Claim 1] A temperature control system for a die-casting mold device that integrally molds the frame of a vehicle, A temperature control device that supplies a coolant to the mold to adjust the temperature of the mold, A first refrigerant flow path for the refrigerant to flow from the temperature control device into the mold, A second refrigerant flow path for introducing the refrigerant from the mold to the temperature control device, A bypass channel branches off from the first refrigerant channel and flows the refrigerant into a reserve tank that stores the refrigerant, A flow rate detection unit for detecting the flow rate of the refrigerant in the second refrigerant flow path, A temperature detection unit for detecting the temperature of the mold, An opening adjustment unit adjusts the opening degree from the first refrigerant flow path to the bypass flow path based on the detection result of the flow rate detection unit and the detection result of the temperature detection unit, Equipped with, A temperature control system for a mold apparatus, wherein the opening degree adjustment unit lowers the opening degree from the first refrigerant flow path to the bypass flow path until the flow rate detected by the flow rate detection unit becomes the flow rate when the mold temperature is at an appropriate value, when the temperature temperature detected by the temperature detection unit is at or above a first predetermined value, and raises the opening degree from the first refrigerant flow path to the bypass flow path until the flow rate detected by the flow rate detection unit becomes the flow rate when the mold temperature is at an appropriate value.

Images