JPS60216962A - Method and apparatus for controlling temperature of casting mold - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention controls the mold temperature of a die-casting machine 11-! The present invention relates to a method and apparatus for controlling the mold temperature in a die-casting system including a balanced dual-motion die-casting machine. Die-casting machines of the type described above incorporate two pairs of spaced apart parallel cylinder assemblies, each supporting a mold half, the pistons of the cylinders being mounted to the machine frame and the cylinders being connected to the pistons. There are 4 moving above.

A typical die casting machine is provided with a frame, and a fixed or stationary plate is provided on the frame, and a half member of a mold for making a cast part is attached to the plate. . The other halves of the mold are on the movable play 1~'! i! Due to the presence of this movable play 1-, the casting part can be dropped from the die-casting machine in the open position. The movable plate 1- is filled with a mold, confines the molten metal, and is then closed and clamped with sufficient force. In operation, the casting part is separated from the mold half (cover half) on the fixed plate and is injected into the spinning mold cavity on the mold half (ejector half) on the movable plate. After solidification of the molten metal, it is retained as it moves through the die casting machine.The parts retained on the mold halves are then ejected and must fall or be transported out of the die casting machine. The above-mentioned unilateral movement is a major cause of the need for various and complex types of automatic part handling machines in relation to conventional spinning machines.Similar problems arise in secondary machines such as trimming.
This also occurs when a part is indexed and moved to the next operation, and in this 1-rimming operation a similar machine that operates biased in one direction is used. The component transport carrier must perform indexing and lateral movements compatible with the plate opening and opening strokes when the casting component is in a fixed position for the desired operation.

Such a conventional die casting machine is disclosed in U.S. Patent No. 4,0
No. 13,116 (issued March 22, 1977).

What makes this machine much better than conventional machines is that the cast parts are cast without any lateral movement.
The point is that it is indexed and removed from the machine. During the processing process, the casting part lies in a fixed plane and is transported within this fixed plane. This FJ manufacturing machine receives balanced forces in each part, and both the plate of the die (mold) and the mold halves move by an equal distance #t from or toward the plane of the part, so UJ3 Due to this balanced mass movement, shocks during starting and stopping of heavy plates and tools are canceled out, thermal expansion differences are equalized, and cargo deflection is automatically adjusted. are combined.

The balanced, aligned, single-sided die-casting machine of U.S. Pat. No. 4,013,116 is the basis of the present invention; (Additional features have been added to J3,
An example of them would be as follows. First, a low-mass cable conveyor is installed, making it easy to remove casting parts from the machine, and a simple Kia rear fin is installed on the center line of the mold, making metal injection possible. The stroke length of the plate movement is half the normal time, therefore the non-productive time for opening and closing the machine is halved, and the upper core bin is on the parting line. This arrangement stabilizes part movement during mold opening, thereby eliminating the need for ejector pins for some parts, and making it possible to add internal cores within both mold halves. There are automatic installation gaps during mold and trim die installation, etc. The machine of the present invention is constructed as a totally integrated casting unit and is capable of automatically casting and trimming superior quality casting parts at current production rates of 111 J3.

From this point of view, the die-casting machine including the mold humidity control device of the present invention is formed as one unit 1 to incorporate many features.

The main mechanical parts consist of a frame, a spinning machine plate and a hydraulic closing and closing cylinder with a simple reduction system to eliminate mold closing shocks.

A standard and uniform basic mold profile is provided for J3.
The profile is adapted to accommodate a wide range of part types and is machine playable to eliminate mold fit failures due to thermal expansion or poor dielet technique.
A predetermined ranking is performed within ~.

The metal injection section of the machine is equipped with a self-contained molten metal supply member with an infinitely variable 9Il dispensing device that can be preset to the desired speed or pressure and an internal electrical resistance heater.

It also includes a self-contained hydraulic power system using non-flammable fluids. Also included is a means for preheating the mold prior to first charging the mold. The unit has a self-contained heating unit for cooling the mold and removing lime deposits in the cooling passages, and the unit can be installed without the use of hoses or pipes. It can be automatically connected to 8h type. A cable conveyor is also provided which transports the castings on fingers to other secondary operations with sufficient time before trimming so that the castings are free of natural and Cools without distortion. Additionally, along with said conveyor, a basic die side is also installed for directing supplementary I-rim machinery and parts from inside the die to the exit conveyor.
It is being

According to one feature of the invention, there is provided an apparatus for controlling hot stone in a mold of a die-casting machine and for cooling heat from molten metal supplied to a cavity in said mold: adjacent to said cavity; a manifold passage formed in the mold for retaining cooling water in the mold, the manifold passage having an inlet and an outlet device coupled; the outlet device for maintaining the cooling water at a predetermined internal pressure in the manifold passage; a pressure relief device associated with; controlling said pressure relief device to remove heat from said mold cavity through the release of steam produced by evaporation of cooling water in said manifold passageway adjacent said cavity; an adjustable regulator device for controlling the temperature of the cooling water in the manifold passageway by the pressure relief device; a water supply tank coupled to the outlet device for receiving condensed vapor released from the manifold passageway by the pressure relief device; and a device for injecting water from a make-up volume W into the manifold passage in place of the water that has evaporated and been removed via the pressure relief device; An apparatus for controlling hot stone in a mold is provided, having: a pump device in a conduit, and an injection device having an artificial valve device between the pump device and the manifold passage.

The present invention will be specifically explained below with reference to the accompanying drawings.

Referring to FIGS. 1-3, the die casting system of the present invention includes a die casting apparatus 10 having a frame 12 with two pairs of spacing, instep cylinder assemblies 14, 16. I'm annoyed.

The six pairs of assemblies 14 are shown in FIG. 3, as shown in FIG.
0 is placed opposite the other pair of assemblies 16 carrying 0. As best seen in the general layout diagram 1 of FIG.
It has a stationary piston 22 and a piston shaft 24 mounted coaxially and axially aligned with one end of the piston, the shaft 24 extending across the center of the machine and It is connected at its end to the opposing piston 26 of the other cylinder assembly 16 .

As illustrated in FIG. 3, each cylinder assembly 14, 16 is mounted on a respective piston 22, 26 and includes a cylinder 1c and a respective crown or skirt of these pistons.
a shaft 24 for reciprocating the cylinder in response to hydraulic fluid injected onto the end 62.64, and a shaft 24 for reciprocating the cylinder in response to hydraulic fluid injected onto the end 62.64; The associated mold halves are moved to the open or closed (as shown) position.

For a more detailed explanation of the basics of the device 10, see U.S. Pat. No. 4.013.

Referring now to FIG. 1, a top view of apparatus 10 is shown with mold clamp cylinders 14, 16, brine 32, die separation and evacuation cylinders 34, and rll stops 1 to prevent accidental movement of the cylinders. The drive 38 for the pick 36 and transport mechanism is shown below.

FIG. 2 illustrates an ejector assembly 40 that connects a furnace 42 with input and output valves 46,48.
It has a ten neck 44 and an inlet valve opening system 50. The nozzle 52 directs the zinc charge into the mold 54 and provides a casting 56 which is placed in the mold 54 on a conveyor mechanism 60 that transports the cast part to a refinishing station. The fins are cast into 58.

The die-casting machine requires only a small nominal force to advance the mold to the closed position shown in Figure 3, but then a strong clamping force is applied to inject #TI material into the mold. The high internal pressure induced when Therefore, when using a cylinder large enough to clamp a mold, a large volume is required to fill the mold during the closing stroke. As shown in FIGS. There is a device C of the two fastening bar type, each end of which has two shafts 24 extending through the hollow center of two stationary pistons 22, 26 on each side of the device. As shown in Figure 3, the piston has an O-rad extension 2 on its skirt end.
2a and 26a, these extensions are of smaller diameter at the skirt end of the piston, so each end of the surrounding cylinder 28.30 has a slightly different receiving area or area. It is formed. Furthermore, cylinder 28
．． A movable member 30 is formed integrally with the machine platen 32 on each side of the center of the machine. Therefore, by pressurizing both the crown end 62 and mechanism 1 part 64 of each cylinder and creating an internal flow path from the small pressure receiving area 64 to the large pressure receiving area 62, the cylinder can be moved in one direction. The fluid volume required to advance the stroke is simply the difference between the two areas 62°61 x stroke m. When closed as in Figure 3, the pressure on the small area 64 is returned to the tank. , the full force on the large surface l!62 can be used to clamp the die being closed.

The previously described system only functions for die closure; evacuation cylinder 34 is used for die opening.

Cylinder 34 is also a 20-tube type cylinder that utilizes a relatively small net receiving area, thus requiring only a minimal hydraulic flow volume. The cylinder 34 is pressed against a fixed outer stop 35 (FIG. 3) and after opening the device is retracted into the stripper pin play 1 (second
Figure 1).

We have found that this system provides substantial fluid volume savings.

Permanent die casting involves transferring heat from a molten metal alloy to the walls of a die cavity and from the cavity to a heat exchange medium. Therefore, certain parameters must be maintained to obtain the desired heat flow.

In the system J3 according to the present invention, the heat exchange test medium is water, and the electric immersion heater t is simply used to preheat the tie to the initial temperature, and then the tie is cooled to 7J in the cavity. By controlling the internal pressure of the water, mlf higher than the boiling point of water can be obtained. The actual heat removal is accomplished by vaporization of the water as it flows through the system.

The system is shown diagrammatically in FIG.
This figure shows the die being placed in a mold manifold 68 near the cavity surface 70 and holding the die at, for example, 400°F (20
An immersion heater 66 is shown for preheating to an operating temperature of 4°C. The water passage 72 in which the heater is immersed communicates with the cooling passage 74, which communicates with the ground inlet and outlet valves 76, 78, respectively.

The surface area within the die cavity exposed to the molten metal alloy is proportional to the area of the cold surface exposed to water, and the distance between these two surfaces is proportional to the rate of heat transfer of the die cavity material. It is.

The only heat transfer from the die block to the water is evaporative cooling.

The temperature of the water in the die cooling passages 72 is maintained at a certain high temperature during metal charging to allow for good casting results. When the part is then cast, excess heat is carried away by boiling occurring only where superheat conditions exist. Therefore, no circulation or flow of water is required within the die passageway 72. Since steam is generated in direct proportion to the heat removed from the molten metal, a volume of repair water slightly greater than the steam escaping through the pressure relief valve 78 may be injected.

As schematically shown in FIG. 4, the water in the holding tank 807Js is pumped into the cooling passage 72 by the pump device 82 through the intake valve 76. It is also at a slightly larger pressure no. When the heat transferred from dia 0 to passage 72 boils the water in passage 72, valve 78 opens under steam pressure, allowing steam to escape via manifold passage 84 and tube 86, where The steam is condensed and returned to tank 80.

The heat transfer system is integrated with the mold structure and function, with precise flow adjustments that can be applied to various mold conditions. The heat transfer system does not require any hose fittings and is characterized by uninterrupted flow regulation as it changes from one operation to the next.

The metal injection unit according to the invention, designated by the reference numeral 40 in FIG. The only similarity to the system is that this system adds a horn to the piston to drive it, and the piston induces a fluid force filling the mold cavity.

The injection unit 40 is suspended within a feed nut 42 (FIG. 5), which is a double steel wall with an inner wall 106 and an outer wall 108 separated by a web 110. It has a structure and is 0. By adopting such a structure, the strength effect of the continuous large 1" type steel against the Iq horn caused by the molten metal can be exclusively used, and the insulation effect of the air gap type can also be obtained. jfl in crucible 42
A refractory lining 114, which can be fabricated, is affixed to the A-board, lined with a suitable insulating material such as a G-divert 11 (-112, tqv)-A board.

The humidity of the molten metal in the crucible 42 is the melting point IK42 Ill.
A plurality of electric immersion heaters 116 (8th a) spaced apart from each other
(see also the figure), the desired Rem 11 is set. Each heater 116 has an element 118 enclosed within a stainless steel tube 120 to protect the heater from corrosion, increasing the surface area exposed to the cast alloy and reducing heat-tightness. We are doing the work that will help.

Injection of metal into the die cavity is accomplished by an injection assembly shown generally at 40 in FIG.

Details are shown in Figures 8a, 8b and 10. 1IA
The assembly 40 has a steel body 122 and has a +13
The body is suspended in the area of the furnace collar 42 by arms 88 which support a dark blue crown 90 from the machine frame 12. Here, the crown 90 is connected to the long stud 92 to the i1C pin 122.

The body 122 is connected to the screw 12 of the injection valve assembly 46.
8 and a small diameter cylinder 126 that accommodates the valve 130 of the lifter assembly 48.

As shown schematically in FIGS. 6 and 7, the piston 1
28 is the u1 valve 13 that amplifies the pressure of the cast metal flowing into the die.
0 selects the flow path from the crucible source to fill the pressure amplification chamber 132 at the bottom of the cylinder 125 or from the piston 128 to the die depending on its vertical position.

(FIG. 7) The chamber 132 is connected to the selector cylinder 126 by a passage 134 in the Iυ neck shoulder 4 and a conduit 136.

As shown enlarged in FIG. 9, selector valve 130 includes an upper head 100 and a lower head 102 interconnected by a reduced diameter stem 104. Depending on the mode of operation, the upper head 100 engages the valve seat 140 and the lower head engages the valve seat 1-42. The mandrel has upper and lower arms 144, 146 which slidably engage portions of the cylinder 126 so that cast metal is passed between the cylinder wall and the mandrel body. This creates enough room for a 1f74 lead.

During intervals of the machine cycle, the selector valve 130 is held in the shutoff position with respect to the nozzle conduit 136, but with respect to the valve 42, the selector valve 130 is in the 1" position. 140 and is in the "hold and refill" position shown by the dotted line in FIG. In this shut-off position, the valve 130 constitutes a positive bounty protection element that covers the machine nozzle against accidental flow. At the next cycle sequential signal, the valve 130 shifts to its bottom position in accordance with FIG. 9 and the dosing mode (arrow Δ) is ready.

The valve 130 is connected to the piston 150 through a frame and is actuated in both directions by the plumb 48, with the piston 150 being actuated in both upper and lower horizontal directions. Direction cross arm 152°154 and! I
! The frame I consists of a straight arm 156 and is numbered three times.

The dosing cylinder 96 and in particular the internal screws 94 are actuated by an external pressure source which supplies a corresponding volume of infinitely variable air H to its underside. To explain briefly,
The dosing cylinder 124 is cycled to simultaneously fill and draw pressure from the mold cavity. Since the thickness of the spout of the casting mold is thinner than the cross-sectional area of the casting, the thick portion of the spout solidifies first and solidifies in a fraction of a second.

Therefore, instantaneous reversal of the pressure horn does not create a negative impact on the casting; rather, the unsolidified metal within the large intake runner section is expelled, thus leaving the casting part with sludge, as discussed further below. 1. A condition is obtained to which the cast tubular runner part adheres. There are several advantages to operating lift pumping in this manner. First, there is no significant recycle time loss due to heavy runners solidifying. Second, the tubular section of the casting is extremely strong, so it provides a lightweight frame for transporting the casting from the mold. That is, the runner and the cast part emerge at the same temperature, thus having a favorable effect on dimensional stability before retouching. Also, less heat is transferred to the runner area of the mold, and hollow runners reduce the cost of remelting.

Historically, since the molten cast metal is held at a point slightly inside the tip of the stacking nozzle, the amount of refill air released from the mold cavity can be reduced.

Referring now to FIG. 8a, piston 128 is shown in its maximum closing position at the bottom of stroke "S" of ramrod 96. When uj≧t11 is completely filled, the piston 128 stops.

At this time, the flow of molten metal passes through the valves 1 to 1 of the valve 130 (arrow A, FIG. 9). A few fractions of a second after injection is completed and the pouring port has solidified, the piston 12
8 is displaced upward by the pressure applied to the F side of the piston 94. The feed rate in this case is volumetrically equal to the amount of metal contained within the runner system of the casting die up to a point inside the nozzle tip. At this moment, the piston 128 is captured -1 minute longer in its upward movement so that the selector valve 130 is connected to the nozzle and neck tube 136.
While displacing and holding the inner metal column in a stationary position, the piston causes valve 130 to open to the "Hold and Refill" position of FIG. 9. The feed in crucible 42 is thus conducted into chamber 132. Bismy 2128 returns to its uppermost position on the next signal and cylinder 124 can be refilled.

The input cylinder 98 can be equipped with a pressure accumulator that includes a variable pressure air precharge system that provides a constant pressure source to the cylinder 98. However, the precharging system can be varied in capacity indefinitely as required for a particular casting. wi
The injection process is carried out when the opposing fluid pressure is released and the screw 94 is returned to the starting position of FIG. 8a when the fluid pressure horn is reapplied. however,
The initial movement of the dosing and reversing action is accomplished by an auxiliary hydraulic displacement cylinder with an adjustable stroke for injecting a controlled ffi fluid into the reversing circuit. Due to this action, the input piston 128 is retracted, and instead, the unconsolidated fi! [The formed metal is discharged to provide space for the shell-molded hollow portion described above.]

An accumulator-type container is provided to receive the fluid discharged from the input cylinder. Thus, the discharged fluid 5o o o, p, m is A-da,
The reservoir slowly drains the fluid into a tank during a mechanical cycle.

A safety restraint or "kill" system is indicated generally at 141 in FIGS. 8a and 12. This device prevents the dosing mechanism from activating when the machine is being adjusted and when the "dosing" mode is not selected.

That is, the ram rod 96 is provided with a cam flange 143, which cams a pair of locking collars 143 when the ram 96 and piston 94 are in their upwardly facing positions.
45. It engages with 147 and instantaneously displaces it. Flange 143 is thus seated within socket 149. Collars 145, 147 are cantilevered into the closed position of FIG. 12 by springs 149 and are opened against spring pressure by upward movement of flange 143. Once flange 143 is seated within socket 149, pistons 94 and 9
6, the rr1 chain collar engages with the lower side of the flange 143, making it impossible to move downward.

As shown in FIG.
1 and interlock with each other with J3@153.

Collar 147 is attached to bottle 156 Fn in member 157.
It has v# 155 held in the closed position by spring 149 at the top.

Actuator 158 has a rod 159 acting on the other side of m155. When the actuator 158 displaces the actuator 159, the collars 145 and 147
is opened and the ramrod 96 can move downward.

The entire injection assembly is suspended and supported by a cantilevered frame consisting of arms 88 and crossplay I/89 bolted to the casting machine frame 12. Alignment of the assembly is accomplished by a linear motion screw 160 along the axis or centerline of the gun neck 44 and vertically moved fI.
l Twisted screw 162 and horizontally covering screw 1 that moves left and right
64. In order to align the nozzle tip with the #ti die in Figure 8b), ball and socket 1 to joint 166 are used (and the socket is loosened slightly during alignment adjustment). , it is possible to align the nozzle tip with the casting gou by a three-axis movement.

As can be seen from FIG.
68,169 (d3), these surfaces, when extended to lines A and B, are parallel to the center line of lυ neck 44.

Crown 90 rests on surfaces 168 and 169, 1-
170, adjustment of screw 160 moves the assembly in the correct straight line.

The sequential operation of the metal injection system is as follows.

When the mold opening signal is generated, the input select valve 130
moves to the downward position U in FIG. 9 and comes into contact with the 1vfi\ sensor.

The position sensor then generates a signal that causes the suppression system to retract, causing movement of the actuator and the collar 145.
147 is released from the ram flange 143.

The inhibit sensor activates the metal injection dosing piston 94 and starts a timer. The timer provides a signal to the partial retraction system after a fraction of a second of approximate time to allow time for the metal in the pour spout to solidify and then drain and cover the runner. The input selector valve 1 is activated due to the end of the poetry period.
30 returns to its upward position.

When the selector valve 130 reaches the raised position, the closing cylinder 94
receives the signal and returns to its upper position, again moving the suppression system to its locked position.

As shown in Figure 8b, a nozzle extension is provided to bridge the gap from pressure nozzle amplifier 128 to casting die 54 (Figure 2). Referring to Figure 11,
The extension includes an adjustable joint joint, generally indicated at 184, which connects the distal end 186 of the cancer neck to a two-quarter tensioner 188.

The end 186 of the riser is machined to provide a peripheral flange 9190 and an adjacent slot 192. Extension 188 terminates within spherical end 194 such that end 194 and end 186 are properly aligned [li? A conduit 136 is formed therein. These two ends are held in alignment by a pair of clamps 196, 198 secured together by poles 1-200 as shown. The clamp blocks 196, 198 are also equipped with a plurality of cartridge heaters 202 to maintain proper temperature levels at the connections.

As stated at the beginning of this specification, the tie casting equipment or machine according to the present invention utilizes the mold parting line J injection, and at the mold parting line, the forming metal is applied to the molten metal entering the die. It passes through a conduit 1, 36 centered at the parting line and at the periphery on one side of the parting line. Of course, there must be a leak-proof seal that provides a fluid-tight seal with the nozzle when the mold is turned down, but at the same time, there must be enough freedom to prevent sticking when the mold is turned up. C I have to obey. When using a conventional nozzle tip with a circular shape, the mold has two semicircular members opening around it, so that the two corners of the semicircles meet the diameter at the parting line. A zero clearance angle must exist. This is because leak-proof seals require an interference fit, so some opening friction is unavoidable. In order to overcome this drawback and to solve other problems, a square diamond shaped nozzle is used, as shown schematically in FIGS. 13 and 14. A similar profile is used for chirelia finger 58 (FIG. 22), the purpose of which will be explained below.

As shown in FIGS. 13 and 14, one inlet 1-206 is injected into the mold half member 68, and although not shown, the square nozzle 204 is attached to the half member around it. The square hole J formed for the nozzle when 68 is turned 111 is also slightly larger. The variation 31 of the parting line in the nozzle for mechanical alignment is in the range of ±5.08 to -7.62 mr, and these dimensions are accommodated by the elastic movement of the injection assembly.

The insert provides an opportunity for precision mounting of the parts involved. All of the nozzle and mold surfaces maintain proper alignment of the two mold halves; they not only provide an accurate cam arrangement for the two mold halves; they also receive the same unit force during mold closure. Ru.

A preferred embodiment of a nozzle with a multi-cut configuration is illustrated in FIGS. 15 and 16, in which the nozzle 208 has slightly rounded corners 210, Both halves 68 are provided with a flat surface 212 that is laterally aligned with stepped in-1-no-1-206. In addition, as shown in FIG. 16, the nozzle has an angular surface (in side view) 21.
4 and 216, and select the appropriate number 1 from these surface numbers.
Ii1 In order to align in the linear direction, mold half inserter 1-
206 and associated with similar surfaces.

FIG. 16 also shows the cross section of the flash guard 236 i? ii, the flash guard is formed from a reduced diameter surface 220 and an adjacent curved shoulder 222 and associated pocket 226 and its A-faces 1-228. If for some reason molten metal leaks from the nozzle tip under pressure, the flash will be directed to the pocket 2 by shoulder 222 according to arrow F.
46.

The desired temperature of the nozzle 208 is maintained by a nozzle cover 248 surrounding a suitable insulating member 250.
The insulating member 250 surrounds an electric heater 252.

FIG. 17 shows an example of a mold for this device.

One of the fundamental advantages of the present system over conventional systems is the almost perfect thermal balance between the mold halves 68 and the simultaneous isolation of the die away from the casing. Cast parts can be manufactured without stripper pins when there is no core pin and there is sufficient draft. However, with or without the stripper, the cast part is supported at three points J3 around the periphery of the frame in which the part is cast. These three points form a reference plane from which the cast part is subsequently removed from the apparatus. As shown in FIG. 17, the nozzle has finished casting the casting in the spinning mold, and the inlet runner 254 brings the casting to the casting area 256 and around the conveying fingers 58 as shown in FIG. one mold section 258 .

Another inlet 260 extends from the intake runner to the mold body 262 (
In this case, the outlet runner extends into the logo DBM and surrounding frame), and the outlet runner extends upward to surround the dobe core slide 264. Therefore, when the die half members 68 are separated at the same time, they are held by the casting GJ (a') F part core slide 264, (b) nozzle tip III 256, and (C) conveyance finger 258, and the parts 262 are It is conveyed to the outside of the machine by the fingers 58 as described in FIG. 22.

In addition, when the upper support core 264 becomes a core for forming part of a casting, it also acts as a support point for the face of the master mold, and in fact 1- is the core of the stripper bin. Eliminate the need.

In an ordinary die casting machine, when the half member is separated from the cover half member force, it follows the ejector half member of the mold.

Then, nearing the end of the opening stroke, the ejector pin extends and pushes the cast part away from the mold surface. The casting part is attached onto the pin J to ensure that it is released from the bottle surface h1.

Another device that interferes with the tendency to do so is obsolete. This device is usually called a ``quick ejector''.
Do ffJ.

Cast parts are not kept within their original working plane (
In the case of a device according to the invention which has to be removed, a "quick ejector" structure can be used.

In addition, for cast parts, both halves of the mold are at the edge of 178 I'
Therefore, the die-casting apparatus according to the present invention requires a completely different type of part discharging device to loosen the cast part from the mold hs and hold it in this desired fixed position. Requires. There is therefore a device for loosening and simultaneously deflating the bin to hold the part in the center line of the machine, while at the same time taking one end of the part into the delivery finger 58 and keeping the other end pressed against the nozzle. - Figure 18 is a 41V17i side view of the 1st gear plate 1~ and its r3II series machine for rotating the ejector pin.Such a mechanism is provided from both sides of the die cavity. ing.

Ejector pin 228 is mounted at one end into die plate 230 and extends to die face 232 . For this purpose, the pin 228 has an extension piece 234 mounted by a tube 238 in axial alignment with the pin 228. The tube 238 has a pair of spiral grooves 240 formed therein, as shown in FIG. The pin 228 is welded to the tube 238 and the free end of the kiss tension is threaded with a bushing 242 which is adapted to flex on rotation into a pocket 246 under the pressure of a Belleville spring 266. engaged.

The mold plate 268 is provided with a shouldered sleeve 270 having a pair of diametrically opposed pin followers 272 which are arranged in the helical groove 2 as shown in FIG.
Move within 40. The sleeve 270 has splines 27
4 are provided which engage splines 276 on tubular spring lock 278 when release pin 280 is retracted.

When the die casting machine closes the mold halves, pin 228 is in the position of FIG. 20a with its terminal end extending beyond the mold line. As the mold closes (Figure 20b), pin 228 recedes linearly against spring 266 under a pressure of about 150 degrees C. The release pin is retracted and the spring 282 slides the lock 278 forward through the u1 spline 274°2
76 prevents the mating sleeve 270 from rotating. When mold plate 268 is pulled back toward the position of FIG. 20C, follower pin 272 acts within groove 240 to rotate tube 238 and pin 228, and extension 234 is threaded into bushing 242. Plays 1-268 reach the position shown in Figure 20c! Then, the pin is connected to spring 266 which is exerting a load of approximately 200 kg.
It recedes linearly with respect to Mi and is pulled back from the casting by a distance rBJ (approximately 0.2 am).

7ray 1-268 at its ff1J@ position (!120ak
), tube 238 rotates back to the position of FIG.
Remove 76 from engagement.

When it comes to castings, the pin surface rotates! 8-shaped J - The indentation J of the culm prevents the pin from adhering to the casting.

Second, as shown in FIG. 20, the #8 culm retracts the pin an exact distance according to the predetermined position of the helix 240 on the tube 238. Thus pin 22
8 is loosened and retracted, leaving the cast part completely free while remaining housed in the small gap between the pins extending from both halves of the mold.

A device is provided for the primary withdrawal of the core pins before the mold is opened and immediately after the cast metal has solidified. This device not only reduces distortion of the core pin itself, but also provides true stripping action without twisting the casting. This is because the casting has not yet had time to cool and tighten around the C core. The core has at least 0,00 on one side
It must have a drawing slope of 5 am/Cm, sufficient to overcome the amount of shrinkage of the casting during the short interval between solidification and drawing time. This is advantageous in reducing scrap, preventing pin breakage, and preventing distortion in the casting because the core is completely released from the casting when the mold is opened.

Referring to FIG. 21, ejector plates 1-284 support air cylinders 286 that actuate rods 288 in a BIIA manner.

Rod 288 is connected at its end to another plate 290 that carries a plurality of tang pins (only one of which is shown). Note that each core pin is disposed within the tubular slide I to the ripper pin 294. Actuation of air cylinder 286 causes piston rod 288
, play 1-290 and pin 29 in stripper 294
2 can be moved forward or backward.

As generally shown in FIG. 2, the fingers 58 of the parts transporter 4:460 transport the casting parts from the mold cavity to the second culm for secondary operations such as trimming.

When a part is cast from molten metal in a permanent mold, the time is long enough for the part to gain sufficient strength to support the weight after solidification. If it's 4c. However, of course Iυ
In order to shorten cycle times and reduce shrinkage on the core, it is desirable to cover the mold as quickly as possible;
If the stone is heated to a temperature of 7 degrees, and if it is cooled by normal techniques such as water cooling, distortion will occur in the resulting casting.
．． Due to these distortions, the casting becomes legally unstable, especially in the region where the thick part is close to the thick part.

In the system according to the present invention, the conveyor is
The conveyor is #1 and the parts are J%.
1160 onto the fingers 58, and the part is sequentially separated until it is slowly air cooled to near ambient temperature. Slow cooling greatly reduces distortion within the part and allows for secondary machining operations with high precision.

In the illustrated embodiment of the invention, the cast part is mold 60.
from there to the trim work process. 22 here illustrates the "cast" end of the transport mechanism, and FIG. 23 illustrates the "trim" end of the transport mechanism.

Referring to FIGS. 22 and 23, the transport mechanism, generally indicated at 68, has a frame 296 to the right, which frame is located at the vI end of the transport mechanism and has sub-blocks I-298 and 300 to the right. The bookmark carries sprockets 302 and 304 at the trim ends. These sub-buttons 1~ are on the upper side of the running path - plays 1~306
．． 308, and the sprockets 1-302 and 304 are connected to the side play 1-304 for the purpose described below.
It is equipped with 310. Other side plates 312 are installed unconnected between sprockets 1-304 and 298, and these plates 1-312 act as return lower runs for the transport mechanism.

As clearly shown in FIGS. 25 and 26, a multi-Jζ rewire cable 314 is provided around the sprocket, and the cable 314 has a much greater tensile strength than is required for the working load. ing. The cable 314 forms the basis of the conveying system 60 and for this purpose metal fingers 58 are provided on the side of the cable 314 to transport the casting 56 from the mold 68. Loosely taken 11 times - C
There is.

As explained with reference to FIG. 17, the cast "cast parts" are supported within a frame and are comprised of Is GIi materials, including metal intake runners 254 and 260, cast parts 262, and spinning I'l, overflow stripper butt, etc. and winding finger 58
It includes a socket 264 that can be cast onto the center mold as well as a socket I end 258 cast thereon. As shown in FIGS. 25 and 26, the fingers 58 terminate in square, diamond-shaped tapered ends 318.
It is composed of an upper body member 316. Body 318 is connected to Sera 1 to screw 324 - C cable 31
A lower socket 320 is provided for accommodating a plug 322 that is detachably fixed to the lower socket 320. plug 322
connect the body of the finger to the cable-V endrider 3
26.

As shown in FIG. 25, a gap of one minute is provided between the internal socket I- of the finger and the plug 322 to provide finger movement. A plurality of links 328 are also numbered on the coupler 314, and these links can be detachably attached to the C cable via screws 330 to the lever 1.
I'm being kicked. Note that each end of the link 328 has a tapered hole 33.
2, thus providing flexibility in cable movement as the link moves around the shoe 1-.

If one looks completely at the fingers in the right-hand portion of FIG. 25, it will be seen that the body member 316 includes flat portions that provide shoulders 334 and 336 that engage the lower and upper tracks, respectively.

The function of shoulders 334 and 336 is discussed below.

Sprockets 298 and 300 have side play 1 and 338
The plate is rotatably mounted within the connection plate 3.
40 to the sight rail 306, with the plate 338 and the sight rail 306 extending coplanar with each other. In addition, the night rail 306 supports spaced track members 342 as shown in FIG.
Member 342 supports finger 58 and specifically its JFj 334. Note that the track members 342 are spaced apart to accommodate the side surfaces 335 of the fingers 58, as shown on the right side of FIGS. 25 and 26. Furthermore, subroutes 1~ also include an arcuate portion +4344,
Since it extends in the same way as track section H342 in rail 3061, fingers 58 and spacers 328 are continuous both around straight sections and curves, thus allowing debris to become trapped and stop the indexing movement. There are no ruptured points or wedge entrances.

Cable 314 runs along C lower run 312 in its return run as can be seen from the bottom of FIG.
8, where the upper layer 336 of the finger engages the track member 342.

Looking at the upper left part of Figure 22, the sprocket 300 accommodates the spacer sound 328 and drives it! It can be seen that there is provided a spaced recess 346 for accommodating the finger 58 and a further recess 348 contoured for receiving and driving the lower profile portion of the finger 58.

As shown in FIG. 26, the rail 306 is attached to the frame 12 of the die casting machine by a plate 350 and A7 screws 352.

Referring to FIG. 23, the fingers 5 that transport and cover the casting parts
8a as a whole is received at 354 and indexed along the upper track 308 into position on the I-rim mechanism, and after the I-rim operation the cable 314 connects the finger to the sprocket I-3.
Go beyond 02 and pull to 13100. orbit 310
pivots about the center of the lower sprocket 304 with the sprocket l-302 it carries;
Track 310 (which is actually a long arm) is utilized as a lever around the center of block 304 to maintain cable 314 in 5D tension through the action of spring tension member 356. . Note that the member 356 has one end 358 connected to the arm 310 and the other end 360.
is connected to the frame 296 of the transport mechanism. Spring 3
62 applies outward pressure to arm 310-1-,
The arm 310 is attached to the upper track 308 and is connected to the upper part 364 of the arm 364 of the side play 1-3661!1 attached to the upper track 308.
The sprocket is slidable about the center of the sprocket 304 through a sliding connection on the sprocket. The constant fI loading on the cable 314 serves to maintain a constant overall length of the cable with respect to its elastic elongation properties, and small errors in the relative position of the fingers 58 relative to each other are shown in FIG. This is absorbed by the intentional loosening of these fingers as shown for the finger arrangement and by adding to or reducing the displacement of the cable i>,+home position.

As the finger 58a is pulled along the arm 310 with the frame of the item remaining after the trim operation, it reaches the cutter station 368 where the frame loaded with parts is moved to the main 1 rear finger 5.
8 onto a belt conveyor (not shown) and returned to the cast metal melting crucible.

The kick station shown in cross section in FIG. 27 includes a pair of slippers 370 that are mounted on either side of the track or arm 310 and that
74 is connected to a plate 376 via a bolt 372 which is actuated within the linear actuator 380.

As shown in FIG. 24, the fingers 58 are moved downwardly between the regions of the arcuate end 382 of the slipper 380 along with the rest of the casting frame. Here the slipper lies effectively under the ear 384 on the fabric (Figure 30).
. When the indexing operation causes the fingers 58 and the casting frame to reach the position shown in FIG. 27, the linear actuator 38
0 moves by f'1, and the plate 376, poles 1 to 372, and slipper 370 move outward (toward the left horn in FIG. 23 or 27), and the rest of the casting is thrown off and falls onto the conveyor. and returned to the melting crucible. The fingers then return to the casting end of the C conveying mechanism in the lower run of track 312 as shown in FIG.

Referring now to FIGS. 28 and 29, (a) rim assembly 354 carries a medium heat between two platens to support a conveyor track (308) that transports the parts to the trim die and further as required; Occupies a position near J.In fact, the 28th
As shown, the one-rim device straddles the conveyor 308 and the fingers 58 and the parts they carry.

The trim device consists of two moving platens 386 and 388.
These platens carry 1 to rim dies 390, which are held by the blade 386I, and trim bands 392, which are held by the platen 388. These two platens are stationary and pre-positioned castings 39 in the carrier frame.
Move forward in a U-shape to close around 4. The timing of these platen movements is such that die 390 reaches its final position while punch 392 is still advancing, so die 390 cuts the casting part from its carrier frame. Thus, it acts as a support member for the preliminary advancement of the final positioning member 396 just before striking the part.

The trim device 354 is of the two fastening bar type and includes positive and lower prestresses 1 to 398 and 400, which bars are connected to the tubular compression member 40.
2.404 to provide substantial rigidity. As shown in FIG. 29, the bars 398 and 400 are angled from vertical to facilitate removal of suspension by the A-bar head rift 1 of the die. A pair of air (1st day hydraulic shock absorbers 406.
408 are arranged opposite to each other at 180° C. and on a plane including the machine center line, and the punches 39
2 plays the role of absorbing the unloading shock when cutting through the casting/V-cutting section.

One form of the rim device utilizes single acting hydraulic cylinders 410 and 412, which drive each of the platens 388 and 386, respectively, along the centerline of the machine line. Another form of the rim device features hydraulic cylinders 414 and 416 that operate as integral parts of the platen shaft as the casting part is forced through the die for conveyance. It is possible to provide a 1" hole in the type ladle for automatically storing the parts.

The punch 392 and tie 390 have a 1:1 self-alignment property. Referring to FIG. 30, the cast part has an internal pair of holes 420 and a peripheral flash 422. The cast parts are carried by fingers 58 into the 1-rim device as shown in FIG. die 39
0 has a peripheral collar 424, as shown in FIG. 32, which surrounds the casting and at the same time protects the casting from its flash! Supported by JiJ.

The die 390 is attached to the platen 386 by a pair of key-fuss screws 426 and a spring washer V428. Although only one cap screw is shown in FIG. The die 390 is provided with a hole 430 for each A7-head screw 426, the diameter of which is slightly smaller than the body of the A7-hole screw. The die 390 can move in a limited manner on the mounting surface A below the spring washer V428.

As shown in FIGS. 31 and 32, the punch 392 is similarly attached to the riser 432 by a cap screw 434 and a spring washer (?436), and the hole 430 allows the punch 392 to move on its mounting surface. The punch 392 and die 390 are slightly larger than the diameter of the cap screw 434 so that they can "float" with respect to their mounting members and each other.

The bump 392 has a pair of diagonally arranged 46Fs.
IN 5111v11-”'y 3Q RlinO
L-J and V], these pins can engage within holes 438 in die 390 and platen 386. Punch 392 also includes a second pair of locating pins 440.
, and these pins correspond to holes 420 in component 394.

In operation, conveyor 308 and fingers 58 transport casting part 394 to its position in FIG. 28. The die 390 is advanced to its position in FIG. 32 supporting a cast part, and its position is adjusted to correspond to the shape of the part.

Bump 392 then advances toward die 390 and part 394 and hole 420 in the part is inserted into positioning pin 440 of the punch.
, the bump performs alignment movement with its key A7 socket screw 434. When the punch and die are thus closed, the locating pin 396 is housed within the hole 438.

Although the present invention has been described with reference to particular embodiments and particular uses thereof, those skilled in the art will appreciate that the spirit of the invention and the scope of the claims herein are clear without limiting the scope of the invention. Various modifications of the invention may be devised.

The terms and expressions employed in Book II are by way of explanation and not by way of limitation, and therefore these terms and expressions with respect to the present invention may be used for purposes of explanation only and not for purposes of limitation. It should be understood that the equivalents of the items indicated and explained by i are not excluded in any way, but rather that various modifications are possible within the scope of the present invention as defined in the claims.

[Brief explanation of drawings]

1 is a plan view of a die casting machine according to the present invention, FIG. 2 is a cross-sectional view of the machine taken along line 2-2 in FIG. 1, and FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. Figure 4 is a schematic layer C1 of the heat transfer system for cooling the die of the machine according to the invention, and Figure 5 is a cross section of the metal supply crucible and heating device. Figures 6 and 7 are schematic explanatory diagrams of the metal Q] exit part, Figure 8
Figures a and 8b are cross-sectional views of the injection unit 1-, and Figure 9 is an enlarged cross-sectional view of the valve mechanism of the injection unit 1-.
Figure 0 is an open elevational view of the injection unit. Fig. 11 is an elevational and panoramic view of the neck joint; Fig. 12 is a cross-sectional view taken along line 12-'+2 of Fig. 8a; Figs. 13 and 14 are according to the present invention. A conceptual diagram illustrating the nozzle arrangement, Figures 15 and 16 showing preferred nozzle structures, Figure 17 an elevational view of a typical spinning mold cavity, Figure 18 a cross-sectional view of the rotary discharge mechanism, Fig. 19 is a diagram illustrating the cam and driven part of the rotary discharge mechanism 1i4, and Fig. 20 shows the positions of the four balances of the rotary discharge mechanism during operation. Figure 21 is a cross-sectional view of the core pin pull-out system, and Figure 22 is a cast parts transport lXJ! Figure 23 is a cross-sectional view of one end of the spoon, and Figure 23 is a front view of the other end of the front 8d conveyor, m24r.
jmham23mノ1llr24-241;=t/>tsu(
Figure 25 is a cross-sectional view of the transport mechanism taken along line 26-26 in Figure 25, Figure 27 is a cross-sectional view of the transport mechanism, Figure 28 is an elevational view showing a partial cross-section of the trim device; Figure 29 is a cross-sectional view taken along line 29-29 of Figure 28; Figure 30 is a partial cross-sectional view of the trim device; FIG. 31 is a plan view of the punch of the trim device, and FIG. 32 is the (IiI?) of the punch and die of the 1-rim device.
Figure ii. 10: Tycus machine, 12: Frame, 14°16
: Two pairs of spaced apart parallel cylinder assemblies, 18°20: Spinning mold (
Die) Half member, 22: Stationary piston, 26: Opposite -
Piston, 24: Piston shaft, 28.30 Niji cylinder, 62.64: Crown or skirt end, 32
Nibraten, 34: Die separation and discharge cylinder, 36:
Block 1F block, 40: Injection assembly, 54: Rui type, 56
: Casting, 58: Finger, 6o: Conveyor (j4 Agent Asamura Ko Jji・6・Jji~71JG16~ Jgai-Sora

Claims (2)

[Claims] (1) A device for controlling the temperature of a mold of a die-casting machine and removing heat from molten metal supplied to a cavity in the mold, including: a bold passageway that holds cooling water in the mold adjacent to the cavity; a pressure relief device associated with the outlet device to maintain a predetermined internal pressure of cooling water in the manifold passage; and a pressure relief device for controlling the pressure M/J511 M to maintain cooling water in the manifold passage adjacent to the cavity. an adjustable regicolator device for controlling the temperature of the cold water in the manifold passage by removing heat from the fai-type cavity through the release of steam produced by the evaporation of the water; a water supply tank or the like coupled to said GJ system for receiving condensed vapor discharged from said manifold passageway; The device for injecting water into the manifold passage includes a supply pipe line from the tank to the manifold passage, a pump device in the pipe line, and a large mouth valve device between the pump device and the manifold passage. A device for controlling the temperature of a mold, comprising: an injection device for controlling the temperature of a mold; (2) A method for controlling the temperature of a mold of a die-casting machine, the machine comprising: a manifold device for retaining a cooling liquid in the mold adjacent to a cavity of the mold; and a manifold device coupled to the manifold device. a pressure relief device associated with said outlet device, such as an inlet and outlet device, and an adjustable regulator device for controlling said pressure relief device;
a water supply device associated with the device; a device for injecting a make-up capacity of water into the manibold device 4; a supply pipe line from the supply device; a pump device in the pipe line; and an inlet valve device between the pump device and the manifold device, and the method includes: (c) maintaining the water in the manifold device at a predetermined temperature and pressure by setting the pressure release position. 0 evaporating the water in the manifold arrangement of the trough in response to the heat absorbed from the spinning mold cavity through the walls of the mold;
intermittently discharging evaporated water from the manifold device in the form of steam via the outlet device; (Q) condensing and sending the steam to the supply device; A method for controlling the temperature of a mold, comprising: injecting water from a supply chamber into the manifold device to replace evaporated water.