1278363 玖、發明說明 【發明所屬之技術領域】 本發明，係關於使用在壓鑄、塑膠成形等之模具的冷 卻裝置，詳言之，係關於使冷卻水流過穿設在模具之冷卻 孔內來使模具冷卻的模具冷卻裝置。 【先前技術】 本發明之相關技術，有日本之特開平10-80758號公報 所揭示之模具冷卻裝置。該模具冷卻裝置，係在用以壓送 冷卻水及空氣之壓送部，連接供應冷卻水至穿設在模具之 冷卻孔內的冷卻水供應路徑、及用來以空氣淸除冷卻孔內 冷卻水的送出高壓空氣之空氣淸除路徑，並具備使該等冷 卻水供應路徑與空氣淸除路徑合流之流體合流部，藉由將 冷卻水及空氣經由該流體合流部交替壓送至模具之冷卻孔 內，來防止模具因冷卻水殘留於模具冷卻孔內部而過度冷 卻，而能嚴格控制模具溫度。 【發明內容】 然而，在該習知模具冷卻裝置之情形，在將殘留於模 具冷卻孔內部的冷卻水以空氣淸除後，有時冷卻水就會從 冷卻水供應路徑經由流體合流部流到模具冷卻孔內，於是 空氣淸除之效果減弱，造成模具之過度冷卻。這個現象是 起因於冷卻水供應路徑內之冷卻水保持在比原來之保持壓 力高壓之狀態所致。即，將冷卻水從冷卻水供應路徑經由 流體合流部供應至模具冷卻孔內完畢後，立刻使高壓（比止 回閥之開啓壓力高之壓力）之空氣從空氣淸除路徑經由流體 1278363 合流部流出，在冷卻水供應路徑之冷卻水在高壓下被封閉 著，當以空氣淸除完畢後，在比開啓壓力大之壓力下所保 持之壓差會使冷卻水流到模具冷卻孔內。此趨勢在將橡膠 軟管使用於冷卻水供應路徑時尤其明顯，橡膠軟管之膨脹 扮演一種蓄壓器（accumulator)之角色所致。 本發明有鑒於先前技術之問題，係提供一種以空氣淸 除完成後，冷卻水不會流到模具冷卻孔內，而能對模具進 行更嚴格之溫度控制的模具冷卻裝置。 爲達成上述目的，本發明之模具冷卻裝置，係在用以 壓送冷卻水及空氣之壓送部，連接用以供應冷卻水至穿設 於模具之冷卻孔內的冷卻水供應路徑、及以空氣淸除冷卻 孔內冷卻水的壓送高壓空氣之空氣淸除路徑，並具備使該 等冷卻水供應路徑與空氣淸除路徑合流之流體合流部，將 冷卻水及空氣經由該流體合流部交替壓送至前述冷卻孔內 來使模具冷卻；其特徵在於：在前述流體合流部裝設止回 閥，用來將壓力比開啓壓力低之冷卻水及空氣分別保持於 上述冷卻水供應路徑與空氣淸除路徑內，並且將冷卻水從 前述冷卻水供應路徑經由前述流體合流部送出後隔一段時 間，才將高壓空氣從前述空氣淸除路徑經由前述流體合流 部送出。 【實施方式】 以下，依照圖式說明本發明之具體實施例。 本發明之模具冷卻裝置基本上具有：壓送部1，用以壓 送冷卻水及空氣；冷卻水供應路徑2，連接於壓送部1，用 1278363 來供應冷卻水至穿設於模具A之冷卻孔A1內；與送出高 壓空氣之空氣淸除路徑3，連接於壓送部1，用來以空氣淸 除冷卻孔A1內之冷卻水；及流體合流部4，用以使該等冷 卻水供應路徑與空氣淸除路徑合流。 壓送部1，係用以將冷卻水及空氣交替壓送者’其具有 ••高壓水送出泵lb，連接於供水管la (連接於供水源），用 來排出冷卻水；冷卻水用電磁閥lc，裝設於高壓水杲lb之 排出側配管；空氣用電磁閥le，裝設於空氣用配管Id(連 接於空氣供應源）；動作控制電路If’以來自鑄造機之冷卻 開始訊號使動作開始，控制上述高壓水送出泵lb或電磁閥 lc、le，來控制冷卻水及空氣之壓送（送出量或送出時機等） 〇 又，圖中之符號lg係表示冷卻水用過濾器，lh係表示 泵驅動用電磁閥，lj係表示空氣壓力調節用調節器’用以 調節上述壓缸式泵（高壓水送出泵1b)之送出壓力。 此時，將複數條冷卻水供應路徑2以並排之方式分歧 ，在各冷卻水供應路徑2分別裝設冷卻水用電磁閥1c，並 且從空氣用配管Id(連接於空氣供應源）將複數條空氣淸除 路徑3以並排之方式分歧，在各空氣淸除路徑3裝設空熟 用電磁閥lc，以該等1條冷卻水供應路徑與1條空氣淸除 路徑來構成1組冷卻系統，各冷卻系統分別具備流體合沭 部4，各冷卻系統，係可由1個動作控制電路1 f控制。 用以送出及壓送冷卻水之高壓水送出泵b，雖能使用 常用周知的泵，但是在本實施例使用以高壓空氣動作之壓 1278363 缸式泵。 控制冷卻水及空氣之壓送（送出量或送出時機等）的動作 控制電路1 f，係由使用繼電器、計時器之順序控制方式、 及使用微電腦之電腦程式控制方式等來控制的電路所構成 ，以來自鑄造機之冷卻開始訊號使動作開始’控制高壓水 送出泵lb、冷卻水用電磁閥1C及空氣用電磁閥1e，來控 制各冷卻系統之冷卻水及空氣之壓送（送出量或送出時機等） 〇 流體合流部4，係用以使連接於壓送部1之冷卻水供應 路徑2與各空氣淸除路徑3合流，使冷卻水與空氣能交替 壓送，接近冷卻水歧管5(設置在模具A之上部等）而配置’ 並裝有止回閥4a、4b。 所使用之止回閥4a、4b，係使用彈簧式止回閥’使壓 力比開啓壓力低之流體（冷卻水或空氣）分別保持於各冷卻水 供應路徑2與各空氣淸除路徑3。 這樣，藉由在流體合流部4裝設止回閥4a、4b，即使 在空氣淸除路徑3與冷卻水供應路徑2之冷卻水歧管5之 附近不特別裝設空氣用電磁閥與冷卻水用電磁閥’也能在 冷卻水供應路徑2內保持冷卻水，將冷卻水或空氣迅速切 換而交替壓送。 冷卻水歧管5，係如習知者’具有1個供水口及排水口 (未圖示）與複數個往路側口 5a、…與返路側口 5b、…，將 其供水口接近流體合流部4之出口而連通連接’在排水口 連接排水軟管5c，在各往路側口 5a、…與返路側口 5b、… 1278363 分別透過軟管6a、6b將往復式冷卻管6c連通連接來構成 模具冷卻部6，使往復式冷卻管6c以可拆裝之方式***安 裝於模具A冷卻孔A1內。 其次，說明本模具冷卻裝置之動作。 首先，分別將壓送部1之冷卻水管1a連接於供水源， 將空氣用配管1 d連接於空氣供應源’依冷卻模具之冷卻條 件（冷卻溫度、冷卻時機等）相同或相近之部分將冷卻系統作 區分，於壓送部1依序連接流體合流部4與冷卻水歧管5 ’ 然後將模具冷卻部6之往復式冷卻管6c***安裝於模具之 冷卻孔A1內，將壓送部1之動作控制電路If與鑄造機之 控制電路作電氣連接。 這樣，當壓送部1之動作控制電路1f接受來自鑄造機 之冷卻開始訊號，高壓水送出泵lb就動作而開始冷卻水之 送出，並且冷卻水用電磁閥lc就動作而開始冷卻水之壓送 。高壓水送出泵lb所送出壓送之冷卻水’從冷卻水供應路 徑2經由流體合流部4至冷卻水歧管5，從冷卻水歧管5之 各往路側口 5a、…經由軟管6a—往復式冷卻管6c之往路 進入模具A之冷卻孔A1內，在該處進行熱交換。然後’ 冷卻水從往復式冷卻管6c之返路通過軟管冷卻水歧管 5之返路側口 5b、…，從冷卻水歧管5之排水軟管5c排出 〇 然後，冷卻水用電磁閥1C經過預先設定之時間就停止 ，接著空氣用電磁閥le動作而開始高壓空氣之壓送。 此時，將冷卻水從冷卻水供應路徑2經由流體合流部4 1278363 送出後經過適當之時間後，才使高壓空氣從空氣淸除路徑3 經由流體合流部4排出。該時間延遲之設定’雖可考慮： 例如，以順序電路之計時器來使切換延遲’或以壓力感測 器及壓力開關等壓力檢測來使切換延遲’但是本發明並不 限定於上述方法。 然後，藉由停止供應來自壓送部1之冷卻水’使從冷 卻水供應路徑2經由流體合流部4流至模具A冷卻孔A1 內的冷卻水，不會在將壓送出之高壓空氣與止回閥4a之開 啓壓力兩者之作用下保持於冷卻水供應路徑2內，而僅會 鲁 在止回閥4a開啓壓力之作用下保持於冷卻水供應路徑2內 〇 冷卻水停止供應後隔一段時間才從壓送部1壓送出之 高壓空氣，係從空氣淸除路徑3通過流體合流部4，與冷卻 水同樣地從冷卻水歧管5之各往路側口 5 a、…，再通過車人 管6a—往復式冷卻管6c之往路進入模具A之冷卻孔A1內 ，邊將殘留於模具A冷卻孔A1內之冷卻水以空氣加以淸 除，邊從往復式冷卻管6c之返路通過軟营冷卻水歧备 5之返路側口 5 b >冷卻水歧管5 ’排出f旲具A外 以上所說明之冷卻水及空氣之壓送、停止，係藉由壓 送部1之動作控制電路1 f來對每個冷卻系統進行控制。又 ，該等冷卻水及空氣之壓送、停止動作，係在每個鑰坦循 環均進行。 本發明之模具冷卻裝置，如上所述，係具備流體合流 部，使冷卻水供應路徑（供應冷卻水至穿設於模具之冷卻孔 11 1278363 內）與壓送高壓空氣之空氣淸除路徑（用於以空氣淸除上述冷 卻孔內之冷卻水）合流，將冷卻水及空氣經由該流體合流部 交替供應至前述冷卻孔內來使模具冷卻；並且在流體合流 部裝設止回閥（將壓力比開啓壓力低之冷卻水及空氣分別保 持於前述流體合流部），並將冷卻水從冷卻水供應路徑經由 流體合流部送出冷卻水後隔一段時間，才將高壓空氣從空 氣淸除路徑經由流體合流部送出高壓空氣，因此，當將冷 卻水及空氣交替壓送至模具冷卻孔內而間歇地供應冷卻水 時，空氣淸除完成後，冷卻水不會流到模具之冷卻孔內。 因此，防止冷卻水殘留所引起之模具之過度冷卻，可更嚴 格地控制模具之溫度。 【圖式簡單說明】 (一） 圖式部分 圖1，係本發明實施例的示意回路圖。 (二） 元件代表符號 1 ‘壓送部 2 冷卻水供應路徑 3 空氣淸除路徑 4 流體合流部 4a、4b 止回閥 5 冷卻水歧管 A 模具 A1 冷卻孔 121278363 发明 发明 发明 发明 发明 发明 发明 发明 【 278 278 278 278 278 278 278 278 278 278 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 】 Mold cooling mold cooling device. [Prior Art] A related art of the present invention is a mold cooling device disclosed in Japanese Laid-Open Patent Publication No. Hei 10-80758. The mold cooling device is connected to a pressure feed portion for pumping cooling water and air, and supplies a cooling water supply path for supplying cooling water to the cooling holes of the mold, and for cooling the cooling holes by air. The air is sent out by the high-pressure air to remove the path, and has a fluid confluence portion that merges the cooling water supply path and the air removal path, and the cooling water and the air are alternately pumped to the mold through the fluid confluence portion. In the hole, the mold is prevented from being excessively cooled by the cooling water remaining inside the cooling hole of the mold, and the mold temperature can be strictly controlled. SUMMARY OF THE INVENTION However, in the case of the conventional mold cooling device, after the cooling water remaining inside the cooling hole of the mold is removed by air, the cooling water sometimes flows from the cooling water supply path to the fluid confluence portion. In the mold cooling hole, the effect of air removal is weakened, resulting in excessive cooling of the mold. This phenomenon is caused by the fact that the cooling water in the cooling water supply path is maintained at a pressure higher than the original. That is, after the cooling water is supplied from the cooling water supply path to the mold cooling hole via the fluid merging portion, the high pressure (pressure higher than the opening pressure of the check valve) is immediately removed from the air removal path via the fluid 1278363. When flowing out, the cooling water in the cooling water supply path is closed under high pressure. When the air is removed, the pressure difference maintained at a pressure greater than the opening pressure causes the cooling water to flow into the cooling holes of the mold. This trend is particularly evident when rubber hoses are used in the cooling water supply path, and the expansion of the rubber hose acts as an accumulator. SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and provides a mold cooling device capable of performing stricter temperature control on a mold after cooling air is removed without flowing the cooling water into the cooling holes of the mold. In order to achieve the above object, the mold cooling device of the present invention is connected to a pressure feed portion for pumping cooling water and air, and is connected to a cooling water supply path for supplying cooling water to a cooling hole penetrating the mold, and The air removes the air removal path of the high-pressure air from the cooling water in the cooling hole, and has a fluid confluence portion that merges the cooling water supply path and the air removal path, and alternates the cooling water and the air through the fluid confluence portion. Pressing the pressure into the cooling hole to cool the mold; wherein the fluid merging portion is provided with a check valve for maintaining cooling water and air having a lower pressure than the opening pressure in the cooling water supply path and the air, respectively The removal of the cooling water from the cooling water supply path via the fluid combining portion is performed for a period of time, and the high-pressure air is sent from the air removal path through the fluid combining portion. [Embodiment] Hereinafter, specific embodiments of the present invention will be described in accordance with the drawings. The mold cooling device of the present invention basically has a pressure feeding portion 1 for pumping cooling water and air, a cooling water supply path 2 connected to the pressure feeding portion 1, and supplying cooling water to the mold A by using 1287363. The cooling hole A1; the air removal path 3 for sending the high-pressure air, is connected to the pressure feeding portion 1 for removing the cooling water in the cooling hole A1 by air; and the fluid confluence portion 4 for making the cooling water The supply path merges with the air removal path. The pressure feeding portion 1 is configured to alternately transfer cooling water and air to the pump lb, which is connected to the water supply pipe la (connected to the water supply source) for discharging the cooling water; The valve lc is installed in the discharge side pipe of the high pressure water tank lb; the air electromagnetic valve le is installed in the air pipe Id (connected to the air supply source); and the operation control circuit If' is driven by the cooling start signal from the casting machine At the start of the operation, the high-pressure water delivery pump lb or the electromagnetic valves lc, le are controlled to control the pressure delivery of the cooling water and the air (the delivery amount or the delivery timing, etc.). Further, the symbol lg in the figure indicates the filter for the cooling water. Lh is a solenoid valve for pump driving, and lj is a regulator for adjusting air pressure to adjust the delivery pressure of the above-described cylinder pump (high pressure water delivery pump 1b). At this time, a plurality of cooling water supply paths 2 are branched in a side-by-side manner, and each of the cooling water supply paths 2 is provided with a cooling water electromagnetic valve 1c, and a plurality of air supply pipes Id (connected to the air supply source) are used. The air removal path 3 is divided in a side-by-side manner, and the air-cleaning electromagnetic valve lc is installed in each air removal path 3, and the one cooling water supply path and one air removal path form a cooling system. Each of the cooling systems includes a fluid entanglement unit 4, and each of the cooling systems can be controlled by one operation control circuit 1f. The high-pressure water for sending and pumping the cooling water is sent out to the pump b. Although a commonly known pump can be used, in the present embodiment, a high-pressure air-pressing 1278363 cylinder type pump is used. The operation control circuit 1 f for controlling the pressure feed (sending amount, delivery timing, etc.) of the cooling water and the air is constituted by a circuit that is controlled by a relay, a timer, and a computer program control method using a microcomputer. Controlling the high-pressure water delivery pump lb, the cooling water solenoid valve 1C, and the air solenoid valve 1e with a cooling start signal from the casting machine to control the cooling water and air pressure delivery (send amount or The timing of the delivery, etc.) is to cause the cooling water supply path 2 connected to the pressure feed unit 1 to merge with the air removal path 3, so that the cooling water and the air can be alternately pumped, and the cooling water manifold is approached. 5 (provided in the upper part of the mold A, etc.) and configured 'with the check valves 4a, 4b. The check valves 4a, 4b are used to hold a fluid (cooling water or air) having a lower pressure than the opening pressure in each of the cooling water supply paths 2 and the respective air removing paths 3, using a spring type check valve'. In this way, by providing the check valves 4a and 4b in the fluid merging portion 4, the air solenoid valve and the cooling water are not particularly provided in the vicinity of the air rinsing path 3 and the cooling water manifold 5 of the cooling water supply path 2. The solenoid valve ' can also hold the cooling water in the cooling water supply path 2, and the cooling water or the air can be quickly switched and alternately pumped. The cooling water manifold 5 has a water supply port and a drain port (not shown), a plurality of forward side ports 5a, ... and a return side port 5b, ..., and the water supply port is close to the fluid confluence portion. 4, the outlet is connected, and the drain hose 5c is connected to the drain port, and the reciprocating cooling tubes 6c are connected to each other through the hoses 6a and 6b at the respective bypass side ports 5a, ... and the return side ports 5b, ... 1278363, respectively. The cooling unit 6 allows the reciprocating cooling pipe 6c to be detachably inserted into the cooling hole A1 of the mold A. Next, the operation of the mold cooling device will be described. First, the cooling water pipe 1a of the pressure feed unit 1 is connected to the water supply source, and the air pipe 1d is connected to the air supply source. The cooling water cooling unit (cooling temperature, cooling timing, etc.) is cooled or cooled in the same or similar parts. According to the system, the fluid merging portion 4 and the cooling water manifold 5' are sequentially connected to the pressure feeding portion 1. Then, the reciprocating cooling tube 6c of the mold cooling portion 6 is inserted into the cooling hole A1 of the mold, and the pressure feeding portion 1 is inserted. The action control circuit If is electrically connected to the control circuit of the casting machine. In this way, when the operation control circuit 1f of the pressure feed unit 1 receives the cooling start signal from the casting machine, the high pressure water delivery pump lb operates to start the delivery of the cooling water, and the cooling water electromagnetic valve lc operates to start the cooling water pressure. give away. The cooling water sent by the high-pressure water delivery pump lb is sent from the cooling water supply path 2 to the cooling water manifold 5 via the fluid combining portion 4, from the respective side ports 5a of the cooling water manifold 5, via the hose 6a. The path of the reciprocating cooling pipe 6c enters the cooling hole A1 of the mold A where heat exchange takes place. Then, the cooling water is returned from the reciprocating cooling pipe 6c through the return side port 5b of the hose cooling water manifold 5, and is discharged from the drain hose 5c of the cooling water manifold 5, and then the cooling water solenoid valve 1C is used. After a predetermined period of time, the air is stopped by the electromagnetic valve le and the high pressure air is started. At this time, after the cooling water is sent out from the cooling water supply path 2 via the fluid merging portion 4 1278363, the high-pressure air is discharged from the air culling path 3 through the fluid merging portion 4 after an appropriate period of time. The setting of the time delay is considered to be, for example, a delay of the switching by a timer of the sequential circuit or a delay detection by pressure detection such as a pressure sensor and a pressure switch. However, the present invention is not limited to the above method. Then, by stopping the supply of the cooling water from the pressure feed unit 1 , the cooling water flowing from the cooling water supply path 2 to the cooling hole A1 of the mold A via the fluid combining portion 4 does not cause the high-pressure air to be sent out. The opening pressure of the return valve 4a is maintained in the cooling water supply path 2, and is only kept in the cooling water supply path 2 by the opening pressure of the check valve 4a, and the cooling water is stopped after the supply is stopped. The high-pressure air that is pressure-fed from the pressure-feeding unit 1 passes through the fluid merging portion 4 from the air eliminating path 3, and passes through the respective side-side ports 5a, ... of the cooling water manifold 5 in the same manner as the cooling water. The path of the human tube 6a-reciprocating cooling tube 6c enters the cooling hole A1 of the mold A, and the cooling water remaining in the cooling hole A1 of the mold A is removed by air, and is returned from the reciprocating cooling tube 6c. The return side port of the soft camp cooling water supply 5 5 b > The cooling water manifold 5 'Exhaust the float water A and the above-mentioned cooling water and air are sent and stopped, by the action of the pressure feed unit 1 Control circuit 1f controls each cooling system. In addition, the pressure-feeding and stopping operations of the cooling water and the air are performed in each key cycle. The mold cooling device of the present invention has a fluid confluence portion as described above, and a cooling water supply path (supply cooling water to the cooling holes 11 1278363 piercing the mold) and an air removal path for pumping high-pressure air (for Converging the cooling water in the cooling holes by air, alternately supplying cooling water and air to the cooling holes via the fluid combining portion to cool the mold; and installing a check valve at the fluid combining portion (pressure is applied) The cooling water and the air which are lower than the opening pressure are respectively held in the fluid confluence portion, and the cooling water is sent out from the cooling water supply path through the fluid confluence portion, and then the high-pressure air is removed from the air passage path through the fluid. The merging portion sends out the high-pressure air. Therefore, when the cooling water and the air are alternately fed into the mold cooling holes to intermittently supply the cooling water, the cooling water does not flow into the cooling holes of the mold after the air is removed. Therefore, the excessive cooling of the mold caused by the residual cooling water can be prevented, and the temperature of the mold can be more strictly controlled. BRIEF DESCRIPTION OF THE DRAWINGS (1) Schematic Part FIG. 1 is a schematic circuit diagram of an embodiment of the present invention. (2) Component symbol 1 ‘Pumping section 2 Cooling water supply path 3 Air removal path 4 Fluid merging part 4a, 4b Check valve 5 Cooling water manifold A Mold A1 Cooling hole 12