200300005 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 200300005 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 200300005 來供應冷卻水至穿設於模具A之冷卻孔A1內；與送出闻 壓空氣之空氣淸除路徑3 ’連接於壓送部1 ’用來以空氣'清 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，裝設於高壓水栗1b 2 排出側配管；空氣用電磁閥le，裝設於空氣用配管ld(連 接於空氣供應源）；動作控制電路If，以來自鑄造機之冷谷P 開始訊號使動作開始，控制上述高壓水送出泵1b或電磁闕 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，係表示 泵驅動用電磁閥，ij係表示空氣壓力調節用調節器’用以 調節上述壓缸式泵（高壓水送出栗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lc ’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裝設空氣 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流 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菜1 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 200300005 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le’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、… 200300005 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以可拆裝之方式插入安 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Id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插入安裝於模具之 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1 f接受來自鑄造機 之冷卻開始訊號，高壓水送出泵1b就動作而開始冷卻水之 送出，並且冷卻水用電磁閥1 c就動作而開始冷卻水之壓迭 。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 200300005 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 ® 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 5a、…’再通過軟 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之返路通過軟管6b—冷卻水歧管 5之返路側口 5b、…—冷卻水歧管5 ,排出模具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if來對每個冷卻系統進行控制L又 ，該等冷卻水及空氣之壓送、停止動作，係在每個1壽造循 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 200300005 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 12200300005 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to a cooling device for a mold used for die-casting, plastic molding, etc. In particular, it relates to cooling water flowing through cooling holes provided in the mold. Mold cooling device for mold cooling. [Prior Art] The related art of the present invention includes a mold cooling device disclosed in Japanese Patent Application Laid-Open No. 10-80758. The mold cooling device is connected to a pressure feeding part for pressure-feeding cooling water and air, and connects and supplies cooling water to a cooling water supply path passing through a cooling hole of the mold, and is used to remove air from the cooling hole for cooling. An air removal path for sending high-pressure air from the water, and a fluid confluence unit for converging the cooling water supply path and the air removal path. The fluid is cooled by alternately pressure-feeding cooling water and air to the mold through the fluid confluence part. In the hole, the mold can be prevented from being excessively cooled due to the cooling water remaining in the mold cooling hole, and the temperature of the mold 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 mold cooling holes is purged with air, the cooling water may flow from the cooling water supply path to the fluid confluence part to Inside the mold cooling hole, the effect of air scavenging 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 higher pressure than the original holding pressure. That is, after the cooling water is supplied from the cooling water supply path to the mold cooling hole through the fluid confluence part, the high-pressure (higher pressure than the check valve opening pressure) air is immediately removed from the air removal path through the fluid 200300005 confluence part. Outflow, the cooling water in the cooling water supply path is sealed under high pressure. After being purged with air, the pressure difference maintained at a pressure higher than the opening pressure will cause the cooling water to flow into the mold cooling holes. This trend is particularly evident when rubber hoses are used in the cooling water supply path. The expansion of rubber hoses is caused by the role of an accumulator. In view of the problems of the prior art, the present invention provides a mold cooling device capable of performing stricter temperature control on a mold without cooling water flowing into the mold cooling holes after air purge is completed. In order to achieve the above object, the mold cooling device of the present invention is connected to a pressure feeding section for pressure-feeding cooling water and air, and is connected to a cooling water supply path for supplying cooling water to cooling holes provided in the mold, and An air removal path for pressurized high-pressure air from the cooling water in the air removal cooling hole, and a fluid confluence unit that merges the cooling water supply path with the air removal path, and alternates cooling water and air through the fluid confluence unit. It is pressure-fed into the cooling hole to cool the mold. It is characterized in that a check valve is installed in the fluid confluence part to keep the cooling water and air with a pressure lower than the opening pressure in the cooling water supply path and the air, respectively. The high-pressure air is sent from the air purging path through the fluid confluence part after the cooling water is sent from the cooling water supply path through the fluid confluence part in the erasing path. [Embodiment] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The mold cooling device of the present invention basically has: a pressure feeding section 1 for pressure feeding of cooling water and air; a cooling water supply path 2 connected to the pressure feeding section 1 and supplying cooling water to the mold A through 200300005; Inside the cooling hole A1; and the air purging path 3 which sends out the pressurized air is connected to the pressure feeding section 1 'for cleaning the cooling water in the cooling hole A1 with air'; and the fluid confluence section 4 'is used for cooling The water supply path merges with the air removal path. The pressure feeding unit 1 is used to alternately feed cooling water and air. It has *: high-pressure water sending pump lb, which is connected to a water supply pipe la (connected to a water supply source) to discharge cooling water; the cooling water is electromagnetic The valve lc is installed in the high-pressure water chestnut 1b 2 discharge side piping; the air solenoid valve le is installed in the air piping ld (connected to the air supply source); the operation control circuit If starts from the cold valley P from the casting machine The signal starts the operation and controls the high-pressure water delivery pump 1b or the electromagnetic pumps lc and le to control the pressure delivery of the cooling water and air (the delivery amount or timing). 〇The symbol lg in the figure indicates the cooling water filter The pump means a solenoid valve for driving a pump, and the ij means a regulator for adjusting air pressure, which is used to regulate the delivery pressure of the above-mentioned cylinder pump (high-pressure water delivery pump 1b). At this time, the plurality of cooling water supply paths 2 are branched side by side, and each cooling water supply path 2 is provided with a cooling water solenoid valve lc ′, and a plurality of the cooling water supply paths 2 are connected from an air pipe Id (connected to an air supply source). The air removal path 3 is divided in a side-by-side manner. An air solenoid valve lc is installed in each air removal path 3, and a cooling water supply path and an air removal path are used to form a group of cooling systems. The cooling system is provided with a fluid confluence unit 4, and each cooling system can be controlled by one operation control circuit 1f. A high-pressure water delivery dish 1 b ′ for sending and pressure-feeding cooling water can use a commonly known pump, but in this embodiment, a pressure 200300005 cylinder pump that operates with high-pressure air is used. The operation control circuit 1 f for controlling the pressure feed (feeding amount or timing) of cooling water and air is composed of a circuit controlled by a sequence control method using a relay and a timer, and a computer program control method using a microcomputer. To start the operation with the cooling start signal from the casting machine, control the high-pressure water delivery pump lb, the cooling water solenoid valve 1C, and the air solenoid valve le 'to control the cooling water and air pressure delivery (sending amount or Delivery timing, etc.) 〇The fluid confluence unit 4 is used to merge the cooling water supply path 2 and each air removal path 3 connected to the pressure feed unit 1 so that the cooling water and air can be alternately pressure-fed and approach the cooling water manifold. 5 (provided in the upper part of the mold A, etc.), and is equipped with check valves 4a and 4b. The check valves 4a and 4b used are spring-loaded check valves to keep fluids (cooling water or air) having a pressure lower than the opening pressure in each cooling water supply path 2 and each air removal path 3 respectively. In this way, by installing the check valves 4a and 4b in the fluid confluence part 4, even in the vicinity of the cooling water manifold 5 of the air scavenging path 3 and the cooling water supply path 2, the air solenoid valve and the cooling water are not particularly installed. The solenoid valve 'can also maintain the cooling water in the cooling water supply path 2, and quickly switch the cooling water or air to alternate pressure feed. The cooling water manifold 5 has a water supply port and a drainage port (not shown), a plurality of on-road side ports 5a, ... and a return side port 5b, ... as known, and the water supply port is close to the fluid confluence part. The outlets of 4 are connected and connected. Drain hoses 5c are connected to the drainage ports, and the return side ports 5a, ... and the return side ports 5b, ... 200300005 connect the reciprocating cooling pipes 6c through the hoses 6a and 6b to form a mold. In the cooling section 6, the reciprocating cooling pipe 6c is detachably inserted into and installed in the cooling hole A1 of the mold A. Next, the operation of the mold cooling device will be described. First, connect the cooling water pipe 1a of the pressure feed section 1 to the water supply source, and connect the air piping Id to the air supply source. The cooling system is connected to the same or similar parts according to the cooling conditions (cooling temperature, cooling timing, etc.) of the cooling mold. Make a distinction, connect the fluid confluence part 4 and the cooling water manifold 5 in order in the pressure feeding part 1, and then insert the reciprocating cooling pipe 6c of the mold cooling part 6 into the cooling hole A1 of the mold, and insert the pressure feeding part 1 The motion control circuit If is electrically connected to the control circuit of the casting machine. 'In this way, when the operation control circuit 1 f of the pressure feeding section 1 receives a cooling start signal from the casting machine, the high-pressure water sending pump 1 b starts to operate and starts sending cooling water, and the cooling water solenoid valve 1 c starts to start cooling. Folding of water. The pressurized cooling water sent by the high-pressure water delivery pump lb is from the cooling water supply path 2 via the fluid confluence section 4 to the cooling water manifold 5 and from each of the cooling water manifold 5 to the road side port 5a, ... via the hose 6a— The path of the reciprocating cooling pipe 6c enters the cooling hole A1 of the mold A, and heat exchange is performed there. Then, the cooling water is discharged from the return path of the reciprocating cooling pipe 6c through the return side ports 5b of the cooling water manifold 5 and the drain hose 5c of the cooling water manifold 5. Then, the cooling water solenoid valve 1C is used. It stops after the preset time elapses, and then the air solenoid valve le operates to start the high-pressure air pressure feed. At this time, after the cooling water is supplied from the cooling water supply path 2 through the fluid merging unit 4 200300005, high-pressure air is discharged from the air scavenging path 3 through the fluid merging unit 4 after an appropriate time has elapsed. The setting of the time delay is considered to be, for example, a delay of the switching by a timer of a sequence circuit, or a delay of the switching by pressure detection such as a pressure sensor and a pressure switch, but the present invention is not limited to the above method. Then, the supply of cooling water from the pressure feed section 1 is stopped, so that the cooling water flowing from the cooling water supply path 2 to the inside of the cooling hole A1 of the mold A through the fluid confluence section 4 does not stop the high-pressure air from being sent under pressure. The opening pressure of the return valve 4a is maintained in the cooling water supply path 2 under the effect of both. It will only remain in the cooling water supply path 2 under the effect of the opening pressure of the check valve 4a. The cooling water is stopped after a period of time. The high-pressure air sent out from the pressure feeding section 1 after time passes from the air removal path 3 through the fluid confluence section 4 ′, like the cooling water, from each of the cooling water manifold 5 to the road side openings 5 a,... 6a—The reciprocating cooling pipe 6c enters the cooling hole A1 of the mold A, and removes the cooling water remaining in the cooling hole A1 of the mold A with air, while passing through the return path of the reciprocating cooling pipe 6c through the soft Pipes 6b—return side openings 5b of the cooling water manifold 5, ...— the cooling water manifold 5 are discharged out of the mold A. The pressure feed and stop of the cooling water and air described above are controlled by the operation control circuit if of the pressure feed unit 1 for each cooling system, and the pressure feed and stop of the cooling water and air are stopped. The system is carried out in each life cycle. % The mold cooling device of the present invention, as described above, is provided with a fluid confluence section, which provides a cooling water supply path (supplying cooling water to the cooling holes 11 200300005 passing through the mold) and an air removal path for pressurizing high-pressure air ( It is used to remove the cooling water in the cooling holes through the air), and the cooling water and air are alternately supplied into the cooling holes through the fluid confluence part to cool the mold; and a check valve is installed in the fluid confluence part. The cooling water and air having a pressure lower than the opening pressure are respectively maintained in the fluid confluence part), and the cooling water is sent from the cooling water supply path through the fluid confluence part to the cooling water after a period of time before high pressure air is removed from the air removal path through The fluid confluence part sends out high-pressure air. Therefore, when cooling water and air are alternately pressure-fed into the mold cooling holes to supply the cooling water intermittently, the cooling water will not flow into the cooling holes of the mold after the air scavenging is completed. Therefore, to prevent excessive cooling of the mold caused by the cooling water residue, the temperature of the mold can be controlled more strictly. [Brief description of the drawings] (I) Schematic part FIG. 1 is a schematic circuit diagram of an embodiment of the present invention. (II) Symbols of components 1 Pressure feeding part 2 Cooling water supply path 3 Air purging path 4 Fluid confluence part 4a, 4b Check valve 5 Cooling water manifold A Mold A1 Cooling hole 12