TW200402340A - Injection device for die-cast machine - Google Patents

Abstract

Disclosed is an injection device for a die-cast machine that allows real time control of injection speed is constructed of a simple structure. Accordingly, to supply acting oil from an oil pumping device 300 to an acting oil filling part 21 of a first hydraulic compartment 3 connected to a piston 2 for driving an injecting piston 5 inserted in the first hydraulic compartment 3, and to supply the acting oil to a second hydraulic compartment 4 of the piston 2 for driving a pressuring piston 6 inserted in therein, the injection device includes a servo valve 28, a switch valve 23, a 1st passage 25, a 2nd passage 26, and a 3rd passage 27, and a control device 40 for controlling the servo valve 28 and the switch valve 23. The movement of the injecting piston 5 and the pressurizing piston 6 causes injection of the metal molten supplied by a color 62 of a moving plunger 63, to be filled to a cavity 61 of a mold 60, where the injection is controlled by pressurization. The control device 40 controls the degree of opening of the servo valve 28 so as to regulate the above injection speed and pressure. The control device 40 controls the switch valve 23 to regulate the pressure.

Description

200402340 V. Description of the invention (l) The invention belongs to the prior art. The present invention has the prior art. The injection speed of the cavity of the die and the filling condition of the plunger in the injection mold. For example, dissolution does not make the injection sleeve low speed. Next, after the injection speed is switched for cooling the molten liquid, the injection pressure liquid is solidified. Technical field Regarding an injection device of a die-casting machine, a hydraulic cylinder control for casting a high-pressure shadow by an injection column appropriately controls the melt to start the melt in the melt, and the melt is two speeds before the melt solidifies. However, the force has increased rapidly. Casting ring. Due to the system's injection speed, the air end is against the mold. After dissolving, dissolve, and pressurize the product such as aluminum. _ 'Driving should be carried out at the beginning of the casting degree and injection cavity. The molten metal is dazzled by moving the molten metal toward the cavity to release pressure during the melting cycle. In the injection stage, the molten liquid filled in the cavity is injected into the cavity of the cavity filled with the molten cavity. The molten liquid is injected into the molten liquid. When the speed becomes the inlet, the filling is completed, and the melting is completed. The figure shows the injection device of a conventional die casting machine. In the die-casting machine shown in Fig. 1, the mold U0 has a cavity 111 filled with a molten liquid therein, and the injection cavity 112 is connected to the cavity cavity n. The injection plunger 113 fitted into the injection sleeve 112 is advanced toward the mold Π 〇, and the molten solution supplied from the liquid supply port 1 丨 4 with a long handle 杓 丨 丨 5 is injected and filled into the mold cavity 1 11. The plunger 11 3 is driven via a rod 1 2 5 connected to the piston 丨 2 2. The hydraulic cylinder 120 includes an injection hydraulic cylinder chamber 121 and a supercharging hydraulic cylinder chamber 123 that communicate with and are integrally formed with each other. The injection hydraulic cylinder chamber 121 has a built-in

2197-5775-PF (Nl) .ptd 200402340 V. Description of the invention (2) The injection piston 122 connected to the injection plunger 113 via the rod 125 communicates with the hydraulic pressure for boosting the rear end of the injection cylinder chamber 121 The cylinder chamber 123 contains a booster piston 1 2 4. The hydraulic device 130 is connected to the injection hydraulic cylinder 121 and the booster hydraulic cylinder 123. ^ Hydraulic device 130 has a hydraulic pressure source 131, a pressure accumulator 132, a positive injection speed, a valve 13J, a check valve 136, a pressure check valve 丨 "and so on. meter-in) drive injection hydraulic cylinder 121 and booster hydraulic cylinder 123. Injection speed adjustment valve 丨 3 7 is an electromagnetic control driven by an electromagnetic coil 丨 3 8 & ^ ^ This is detected by the coded state 1 3 9 The opening degree of the valve. The encoder 1-9 detects the feed to the control circuit 14o for the control circuit "0 to perform low-speed shooting * speed;: Zhou f / to control the opening of the valve to achieve the target valve opening degree set in advance. : Positive: The valve opening degree of 37. With the valve imi of the injection speed adjustment valve 137, the gauge of the hydraulic cylinder chamber supplied from the hydraulic device 130 to the injection cylinder is made in degrees, and the connection of the moving speed column and the cylinder of the injection piston 122 in the hydraulic cylinder chamber 121 is made. For the injection 137 driven by the rod 125 of the injection piston 122: the movement = 3.6 can prevent the 12 ° reverse flow from the hydraulic cylinder to the injection speed adjustment valve to instruct the pressure control according to the control circuit. The motor can open the valve and increase the value of 200,402,340. V. Description of the invention (3) Pressure = reverse valve 135, the booster piston 124 moves to the injection piston 122, and the injection piston 122. As a result, the molten liquid filled in the cavity entered the injection device of the die-casting machine shown in FIG. 1, and the injection speed regulating valve 137 and the check valve 35 were arranged in parallel between the hydraulic device 13 and the hydraulic cylinder. . However, the injection speed control and the boost control are performed independently. That is, the conditions set by the ancient injection speed control system control circuit 140 and the injection speed adjustment valve 137 system are used for feed forward control to perform low-speed injection, injection, and high-speed injection. The boost control is controlled by the control circuit. 4 The check valve 1 3 5 is opened to drive the booster piston 2 4. As mentioned above, the injection speed is controlled by the control circuit 140 to perform feedforward control. In the case that the control circuit 140 is used, a control device with a simple structure like the control circuit 14 is used. In conditions other than the predetermined operating conditions, there will be quality: soil casting products. In order to improve this situation, brother, even in injection control, = a instantaneous control of feedback control is desirable. It means that the pressure of the molten liquid is filled into the cavity of the mold 11 and the pressure is increased. At first glance, the flow rate of the operating oil from the accumulator 1 32 through the check valve 135 is not required to be controlled. And for certain. If the flow rate of the operating oil supplied to 21 = h \ 12 3 is constant, the pressure rise pressure curve at the time of supercharging is a quadratic curve showing the pressure rise, and it is gentle in the storage i. The same operating oil pressure, oblique near the specified maximum pressure, the quality of the J cast product is stable and improved, the same as the high injection speed control month & the force *, L wide, the rising curve of the casting pressure Preferably close to the corresponding

· ≫ 200402340 V. Explanation of the invention (4) The critical manufacturing of the burr is determined by the mold, the use and the product material; the curve prescribed by the force and the rise time. That is, control of the pressurization; = the rising characteristics make it close to the boundary casting pressure, the rise time 2: the force is reduced, and good quality die-casting products can be obtained. Alas, ‘Nichi Mori’ also constantly controls the flow of oil. The first one is that if you want to control the pressure during boosting in real time. And if-set, such as Λ μ to adjust the valve of the feeding valve, etc., is always high. The valve will make the price of the oil pressure device 130 different. If such a flow is not set to control the pressure at the time of boosting, the valve cannot be precisely divided to produce burrs, and Into Α 懕 quenching ..., back degree 4, each branch has one. SUMMARY OF THE INVENTION An object of the present invention is to provide a die-casting product that can perform injection speed control with feedback control and that the die can be instantly reduced, so that a high-quality die-casting product can be manufactured. Controlling the production of cast burrs Another object of the present invention is achieved. The present invention provides a shooting fluid supply device for a die-casting machine with a simple structure, and the metal garment includes a first hydraulic cylinder chamber for supplying the fluid and a plunger communicating with the mold. There is a second hydraulic cylinder with a large diameter of the hydraulic cylinder chamber, a second hydraulic cylinder chamber, and is moved toward the mold than the first plug, and in the hydraulic cylinder chamber, the column liquid μ cylinder chamber is freely moved 2197-5775-PF ( Nl) .ptd Page 9 2UU4U2340 V. Description of the invention (5) __ The first piston that is inserted is inserted in the upper and lower directions to move freely. The plug is pressed against the plunger. The second hydraulic cylinder chamber with a large piston (5) has a certain space between the port piston and the second piston, and one end communicates with the space in the hydraulic cylinder supplied by the first operating fluid supply device, The first flow path device, -j, which moves from the plug, allows the first movement of the first piston to move the second piston to the second hydraulic cylinder chamber, and the operation fluid supply device supplies the operation fluid c in the direction in which the operation fluid c is located. Road device, located above The first-the other end of the second flow path device of the first hydraulic rainbow chamber and the other end of the two-way clothing set and the supply of the second operation fluid supply device described above are caused by the inside of the road device to reach a predetermined M The force Z 'is installed in the above-mentioned first-class equipment. 2 flows from the above space to the first switch room in the above-mentioned control device: if valve, and the predetermined injection control method ^ system installed in the above-mentioned second flow; the above control device is based on the quantity, and then controls the first The operating fluid of the two hydraulic cylinder chambers facilitates the moving speed and pressure of the above-mentioned column base. The injection device of the above-mentioned die-casting machine is used for speed control and pressure; J: Attacking will control the injection quality of the die-casting valve that controls the quality of the valve. As a result, it is possible to manufacture a high, more preferably, the front end of the first hydraulic cylinder chamber and the above-mentioned space 2197-5775-PF (Nl) .ptd page 10 200402340 --- ^^ V. Description of the invention (6) _____________ Π Bu Lu device, the ^^]

Before the outside of the device, check the non-return valve 夂 2 f: Set the operating fluid to discharge the injection I. Set the above control device to report, +, "you m; make the second on-off valve open: the speed of the plug When the operating fluid at the front end of the cylinder chamber is changed back, and the first-liquid control is improved to high-speed control, 22: 4. Especially when it is open from low to high. The above-mentioned die-casting machine injection dreaming device can, for example, be set from the first i, by setting the first action of = as the liquid, and can be added to the control room for the local speed injection control. The flow path device and the third flow path device having the: = device and the second flow path device, the third opening of the third flow path device = the operating liquid supply device is supplied to the above control device, and when supplied to the second device The operating fluid increasing device, when “j” makes the third switch 2 above, the operating fluid of the cylinder chamber shoots out the dream in the die casting machine described above.: The device can be set from the second action, for example, by setting the second operating fluid. Control = liquid 'and can make the control room device replenish for high speed In the present invention, in order to realize 1. Pressure detection, ": =, has the position detection signal to detect the above-mentioned space detection =;:, nested; the position detection signal is set, and the device is the valve of the wheel opening degree. μ 钿 The above-mentioned control valve device of the above-mentioned valve opening degree detection device__, the on-off control of the above-mentioned position 2197-5775-PF (Nl) .ptd 200402340 V. Description of the invention (7) ::: 2 position detection M The above-mentioned column bar is detected, and the speed of the above-mentioned speed control is switched over the position of the column base to implement the pressure detection signal by implementing the force detection signal. The control device inputted into the above pressure detection device is based on the memory of two kinds of control data, and implements various control programs and various processes for Taiji fe and clothing to perform appropriate control processing. The types of injection devices of X Mingzhi's die-casting machine are described above and other objectives of the present invention-the description of Er Erming has been further improved. The two fruits are hunted by adding the following to the die casting of the present invention and referring to the additional drawings. Instructions. The first embodiment is described with reference to Figs. 2 and 3 for the injection device of the first machine of the present invention. I only know the shape of the M cast. Figure 2 shows the first embodiment of the present invention. Fig. 3 shows the injection of the casting machine in the present invention ===: One of the injection pressure waveform and injection speed waveform in the sad injection control. The die casting machine 1 has a mold 60 and an injection device. The mold 60 has a cavity 61 inside, which communicates with The mold cavity 61 is connected to the injection sleeve 62. The structure of the mold cavity 61 is determined according to the shape of the casting product according to the manufacturing specifications. The injection device has an injection drive section 6, a hydraulic device 300, a hydraulic cylinder 2, and is inserted into the hydraulic pressure. The injection (i) piston 5 of the cylinder and the pressure (second) surface 2197-5775-PF (Nl) .ptd Page 12 200402340 V. Description of the invention (8) Piston 6 and control device 40. ff The driving part 6 includes an injection sleeve 62 and an injection plunger 63. The injection plunger 63 of the outlet sleeve 62 is moved to the mold and filled with a molten metal of the barrel 62, for example, the molten liquid is injected into the mold 60 to the mold 60. Inside the mold cavity 61. And the inside 2 is a first hydraulic cylinder chamber 3 with a built-in injection piston 5 and a second hydraulic rainbow chamber 4 with a plug 6. The injection piston 5 has a rod 5a with an m injection column base 63. The first and the second hydraulic cylinder chamber 3 ii :: the body is formed, the second table chamber 4 is more than the opening of the first-hydraulic cylinder chamber " the opening of the 9 pressing base 6 The diameter is larger than that of the injection piston 5. 63. The injection piston (No.-) piston 5 is connected to the plunger through the piston rod 5a and is inserted into the second hydraulic cylinder chamber 4. The supercharging can be inserted in the first The injection-exit piston 5 of the hydraulic cylinder chamber 3 is in a position opposite to the forward direction (behind the injection-piston 5). In the first hydraulic cylinder chamber 3, the filling-moving piston 5 is moved γΪ ί system is limited A detection device 48 provided between the injection piston 5 and the booster piston 6 is provided to detect the operation of filling the space S. A piston is provided on the front end of the plunger 63 side of the first hydraulic cylinder chamber 3, and The position detector I of the moving position of the plunger 63 detects that in the embodiment of the present invention, a hydraulic driving device using oil is used as the operating fluid for hydraulic movement. However, in this embodiment, the oil Describe the situation of the situation.

2197-5775-PF (Nl) .ptd Page 13 200402340 V. Description of the invention (9) Liquid. Of course, it can also be used as an action oil. As a hydraulic fluid, other hydraulic fluids such as hydraulic fluids are used to replace the hydraulic service device. The hydraulic pressure device 300 of the hydraulic fluid supply device of the present invention has a hydraulic pressure of the hydraulic fluid Mae qna, and ϋ υ υ has an increased pressure storage capacity. Device 31, 'flute pressure check valve 22 of the operating oil provided from the hydraulic pressure source 30 servo control 12 and third flow paths 25, 26, 27, and the servo valve 2 8 and the on-off valve 2 3 . It is made for i hairpin 3; a m: real 1 state of the control room device for backflow prevention from the hydraulic cylinder 2 to the servo valve 28, the temple service valve 28 is the state of the present invention. It is known that the switch valve 23 is an embodiment of the present invention. The second flow path 25, 26, 27 is composed of, for example, a pipe or a manifold for processing holes on the block. ^ Machine path 25, one end is connected to the third flow path connected to the servo valve 28: = two ends are connected to the piston of the injection piston 5 of the first hydraulic cylinder chamber 3, and the rear end of the base 5 and the increase 9 between the front ends of the pressure pistons 6; the working oil filling part of the opening of the side wall of the hydraulic cylinder 2 of the second and second hydraulic cylinders 1 is set at 3 0 〇 through the servo valve 28 and the check valve 22, The working oil that drives the injection piston 5 is supplied to the space $. The first loop 26 is connected to the third flow path connected to the servo valve 28 at one end. The other end is connected to the second hydraulic cylinder chamber 4, and the hydraulic oil for driving the supercharging piston 6 is supplied via the servo valve 28 and the on-off valve 23. One end of the second flow path 27 is connected to the hydraulic device 300, and the other end is connected in common to one end of the first flow path 25 and one end of the second flow path 26, and the oil from the oil L is placed at 300 Operating oil of pressure source 30 and accumulator 3 丨 via servo valve

2197-5775-PF (Nl) .ptd Page 14 200402340 V. Description of the Invention (ίο) Provided on the first and second flow paths 2 5 and 26. The hydraulic pressure source 30 supplies the first-pressure working oil to the third flow path 27 and the accumulator 3 1. The accumulator 31 pressurizes the first pressure working oil supplied from the hydraulic pressure source 30 to the third flow path 27 to a predetermined pressure capable of driving the piston 5 and the booster piston 6. The servo valve 28 is provided in the third flow path 27 and is a servo controllable valve described later by the control device 40. The servo valve 28 includes a servo valve body (not shown), an actuator 2 8 a for opening and closing the servo valve body, and detecting the servo valve.

Opening valve opening detector 2 8 b. The valve opening detector 2 8 b may be provided as a separate entity from the servo valve 2 8. The control signal 4 6 s from the control device 40 is input to the actuator 2 8 &, the actuator 28a adjusts the opening degree of the servo valve 28 according to the control signal 46sl. = Set 40 to control the valve opening degree of the servo valve 28 Based on this, according to the start of production

To the first: 8: valve opening degree, control the flow of operating oil from the oil pressure source 30 and the accumulator 31 two y and the first machine circuit 25, 26. Servo door AA ', the degree is detected by the valve opening detector 28b I check valve 22 is installed in the first flow path 25: and control the valve 28 side through the first flow path to the hydraulic cylinder 2 reading system Allowed ^

=: The flow of the operating oil 'from the second block of the hydraulic cylinder. = The flow of the operating oil from the 21st section 21 to the 21st section 25 (countercurrent filling section of the oil ^ the closing valve 23 is provided in the second flow path 26,前 Open and close the second flow path 26, 疋 valve by the pilot operation. The switch flows oil to the second hydraulic cylinder chamber 4. When it is placed on the shoulder, it is allowed to move.

200402340 V. Description of the invention (11) _ The control device 40 has a processor including 4 processors, 4 circuits, 47 devices, etc. *, not 45 M, data input memory 42, input circuit 43, and output busbar The connection is 44. The processor 4 1 and the flash 2 8 Ϊ f 4 bucket 2 memorize the program and data for driving the control valve 2 8 # which operates according to the prince 41. The opening of the servo valve The detector 28b, the data input device 0, 49, the pressure detector 48 and the like are checked by the input circuit: the device inputs the data input by the data input device 47, the valve opening information touched by the valve S, and the position detector 49; 2, 49s of inquiries and 48 times of position detectors of the column base 63 of the pressure detector 41. Huan ',, Li > 48 $, etc. are output to the processing center 4 1 series is controlled according to the memory of the Queqiao chain Data, execution target; service valve 2: 2 = species, program and each, processor 4 1 reference position w „, 7 net calculations. For example, calculate the position information detected by the plunger _ move == 4 ... And processing. And the processor 41 shows that the injection speed control is switched for 48s and the filling is performed on the mold: Detected pressure information (casting > 1 force). For the control of the injection pressure of each melt and the melting liquid in the right hole 2 and the opening and closing valve 2 3, etc., the processor 4 1 implements the servo valve increase The device 46 and the display circuit 44 will be connected to the output circuit 44 by the processing circuit 44. U special data will be output to the amplifier 46 and the display country 2197-5775-PF (Nl) .ptd 16 Page 200402340 V. Description of the invention (12) The amplifier 46 will be played by the processor 41. [Yu. $ Different control refers to the imitator i, which is output to the actuator 2 8a of the servo valve 28. 」" 扣 τ 做 ~ τ 田 ^ Explains the injection shot illustrated in Figure 1 ^ ^ 0〇. ,, # # # & > The structure of the lingling set and the original illustrated in Figure 2 "; the first" "The difference in the structure of the sadness injection device. In the injection device storage μ _ clothes shown in Figure 2, the second flow path 26 is added, and the feeding valve 28 performs a flow control operation, "Shan" cut oil is provided to the on-off valve 2 3. In other words, the "on-off valve 2 3 is as shown in Figure 1 + ten people-wide. Crashing into the injection device, does not accept from the animal pressure device 3 1 unflow In the injection set shown in Fig. 2, instead of the injection speed adjustment valve 丨 37 provided for the purpose of injection speed control shown in Fig. 1, a servo valve 28 is provided. The operating oil for driving the injection piston 5 passes through the servo valve 28 like the operating fluid for driving pressure and provides a flow control operation. However, the servo valve 28 does not perform injection only as the injection speed adjustment valve 丨 37. Control, but used for injection speed control and pressure control. At night switch The injection device shown in Fig. 2 is equipped with a simple structured valve 2 3 instead of a check valve with a pilot function shown in Fig. 1 5. The injection device shown in Fig. 2 is provided with a control device 40 having a calculation processing function, instead of the control circuit 140 shown in Fig. 1. In the injection device shown in FIG. 2, in order to perform real-time and feedback control on the control device, a pressure detector 48 and a position detector 4 9 and an opening degree detector 28b are provided. < Servo valve 28 is set instead of injection speed adjustment valve 1 3 7 and servo valve 28 is appropriately controlled by the $ system. A simple structure can be used instead of check valve 1 35 with leading function. Make the structure of the injection device quiet

200402340 V. Description of the invention (13) Miscellaneous, as described below, can effectively implement high-precision injection speed control. ^ Referring to Fig. 3, an example of the control of the injection device of the die casting machine shown in Fig. 2 will be described. Κ Chart 3 is an example of the injection pressure waveform and injection degree waveform of the injection device of the die-casting machine. As shown in Fig. 3, the injection control of the die-casting machine is composed of low-distance (first-speed) M and high-speed (second speed) injection = speed control and pressure control program. W ^ The injection speed control described below uses a program stored in the memory 42 and is processed by the processor 41 of the control device 40 and is controlled by the device 40. Month control Low-speed injection control As an initial state, the control device 40 causes the on-off valve 23 to be closed. A predetermined amount of molten metal is supplied into the sleeve 62 of the press 1 from a long handle (not shown). The control device 40 controls the valve opening degree of the servo valve 28 by the first valve opening degree V1. The control of the valve opening degree of the feeding room 28 made by the 1 system 40 is based on the movement of the servo valve 28 to which the control device ^ ^ ㈣ 46Sl is output as the valve opening degree command = 28a, and the actuator 28a is based on the valve opening. The degree command makes the servo valve body ’s opening detection degree 2 8 b detect the actual valve opening degree and negatively return to the $ system clothes set 40. The control device 40, such as the basis of PID control, is to reach the household: = The valve opening degree continuously outputs a valve opening degree control signal as a control signal s to the actuator 28a. Hereinafter, the servo valve made by the control device 40

、 今 -.4 外 ^ / i / 200402340

The control system of 28 is implemented as described above. The control valve of the servo valve 28 made by the servo device Γ, corresponding to the amount of Λ / ⑻1 of the hydraulic cylinder 2, is actuated into the space 8 through the check valve 22 (the ΛΛ part 21 is pressed into the space 8, thereby low speed The moving speed 5 (moving speed) V of the living body 5 and the distance L, the piston rod 5 & of the plug 5 is moved via the shooting tool 60, and the plunger 63 moves the mold speed (first shooting speed) VL in the sleeve 62 to the column Plug 63 The valve opening degree of the oil-filled portion 21 is memorized, and the first valve opening degree VI is provided to the memory 4 2 operating in the control device 40 with a low-moving operating oil, so that the molten liquid starts to be ejected to 6 〇 In the initial stage of the mold cavity 6 j, the molten liquid in the sleeve 62 at the inlet of the fork 60 starts to eject at a low speed without involving air. The high-speed injection control device 40 successively monitors from the injection start point and detects the position. The position of the movable base rod 5 a or the plunger 6 3 (the plunger μ below) detected by the device 4 9 detects the moving distance of the plunger 6 3, and the plunger 6 3 moving at a low speed v 丨 abuts f Same-speed starting point D ′ Control device 4 〇 Outputs to make injection speed ν high-speed (second injection speed) VH The signal 46sl is generated, and the valve opening degree of the servo valve 28 is enlarged to the second opening degree V2 which is larger than the first opening degree V1. As a result, the flow rate of the operating oil flowing into the space S of the first hydraulic cylinder chamber 3 is increased and injected. When the moving speed of the piston 5 is increased from a low speed VL to a high speed (second injection speed) VH, the plunger 63 also moves at a high speed. When the plunger 63 reaches the high speed start point, the injection speed changes from low speed to high speed

2197-5775-PF (N1) .ptd Page 19, 200402340 V. The reason for the description of the invention (15) is that the front end of the molten liquid reaches the mold 60 = the liquid cools and solidifies. to make. The high-speed start point D is the detection information of the position detector 49 in front of the molten liquid which is ejected from the sleeve 62 to the cavity 61 and the end slightly reaches the entrance of the cavity 61, and controls the control. Location D. Of course, the memory 4 of the control device 40 indicates the position data of the speed start point and the start point D. Of course, the second opening speed = f does not speed the shooting speed "Η Action to move the plunger 63: = speed (second state, ... and memorized in the control device 4. The second operation, the filling part measures are controlled by With the control of the device 40, the injection speed ν (column speed) is switched from low speed to high speed, and is melted; :: In the movable cavity 61, the reaction force that generates the fine forward force of the column = = = :) pressure. Η ^ injection speed v After switching to the high-speed VH, the filling of the molten liquid into the cavity 61 begins ^, the moving speed of the plunger 63 decreases, and the injection speed v decreases rapidly and is represented by the ^ th speed vd. The control device 40 memorizes the table in the memory 42 in advance according to The position data of the deceleration start point L is not detected, and the deceleration start point of the deceleration start is detected from the position information of the plunger 63 3 detected by the position detector 49. The injection speed ν that the molten liquid fills the cavity 6 1 decreases and the column When the plug 63 can hardly move forward, the injection pressure P rises and is expressed as the third pressure pd. Moreover, the slope of the third speed Vd indicating the deceleration of the plunger 63 is adjusted by the following method: the servo is adjusted by the control device 40 Valve opening of valve 28, 2197-5775-PF (Nl) .ptd Page 20 20 0402340 V. Description of the invention (16) While adjusting the dynamic boosting control injection speed V of the operating oil filling portion 21 supplied to the hydraulic cylinder 2, the position of the plunger 63 reaches the boosting start point M, and the control device 40 detects from the position Detected by the detection information of the controller 49, the control device 40 outputs a control signal 46sl to the actuator 283 of the servo valve 28, and the service valve 28 is further opened to a third valve opening degree larger than the second valve opening degree. At the same time, The control device 40 places the on-off valve 23 in an openable state. ... When the servo valve 28 is opened to the third valve opening degree V3, a large flow rate operation is performed. The accumulator 31 is rapidly supplied to the first flow path 25 and the second flow path 26. Thereby, the on-off valve 23 provided in the second flow path 26 is opened in accordance with the amount of motive oil flowing through the second flow path 26, and the operating oil is supplied to the second hydraulic cylinder through the on-off valve 23; When the oil is supplied to the second hydraulic cylinder chamber 4, the booster piston 6 advances toward the firing piston 5. When the supercharging piston 6 moves forward, the operating oil pressure in the space s between the injection pistons 5 increases when the supercharging piston 6 is turned on, so that the check valve 22 is automatically closed. As a result, the supply of the operating oil to the first cylinder chamber 3 is blocked by the first passage holder, and the space s between the booster 6 and the injection piston 5 in the first hydraulic cylinder chamber 3 is sealed. / By closing the space S, the injection piston 5 is pushed toward the mold 60 by the pressure increasing piston 6. The injection pressure p of the plunger 63 rises and is expressed as four pressures pt. Finally, the maximum injection pressure (fifth pressure) Pmax is reached. The maximum injection pressure Pmax is also a holding pressure, and the molten liquid filled in the cavity 6 1 of the mold 60 is held by the plunger 63 to be solidified. 1. The pressurized state of the molten liquid in the mold 8 61 is from the 200402340 which detects the pressure in the space s. 5. Description of the invention (17) The detection signal of the pressure detector 4 8 is between the predetermined holding time and the force Pmax. The feedback signal of the pressure detector 48 is used to calculate the valve opening degree control of the error signal servo valve 28. As described above, the control device 40 controls the valve-out speed (moving speed) of the servo valve 28, the pressure increase control from the pressure increase starting point M, the valve opening detection signal, and the position check force detector 4. The control of the pressure detection information of 8 is performed in accordance with the system of the die casting machine and the feed-forward event is not affected by the injection control. Then, it is adjusted by the control device 4 to adjust the reduction of the third speed Vd. It is also appropriate to switch to the boost control as described above, and it is possible to control the valve opening degree of the servo valve 28 in accordance with the invention 40 to the desired injection control in real time. 1. The first embodiment of the present invention The control device 40 of the second embodiment that performs the above-mentioned high-precision injection control is estimated. In the first embodiment, the control device 4 maintains the target maximum injection pressure detection signal 'for example, using a PID control signal' based on the error signal, and controls low-speed and high-speed injection by controlling the opening degree control. The deceleration control from the deceleration start point L, the position detection information of the servo valve 28 detector 49 of the valve opening detector 28b, and the feedback and real-time control of the pressure. This is the actual condition of the injection device and the control method is compared. Even if unexpected behavior occurs, this is its advantage. The speed adjustment of the valve opening degree of the servo valve 28 made is sad, and from this, the injection speed is controlled (the timing is appropriate). In the first embodiment, the value of the injection speed and injection pressure is controlled by the control device. Therefore, an injection device of a height that cannot be made is simpler in structure, and the cost of the injection device can be greatly reduced.

2197-5775-PF (Nl) .ptd Page 22 200402340 V. Description of the Invention (18) The second embodiment of the pressure of the present invention will be described with reference to FIGS. 4 and 3. Or < Injection event Fig. 3 shows an example of the injection " 4 injection velocity waveform referred to in the first embodiment. Soil area: Fig. 4 is a structural diagram of an injection machine according to a second embodiment of the present invention. In Fig. 4, the same structure as that of the injection device of the die casting machine used in Fig. 2 is used. The condition of the slant base 6 in which the injection piston 5 is driven by the inlet throttle of the month in the same manner as described in FIG. 2 (the second fTL of the first embodiment described with reference to FIG. 2) will be described. Therefore, an instinct and a booster, servo valve 2 8 in the flow rate than the bank note from the ^ ^ / heart of the dream forgiveness ... the amount is limited; must. . The value is nine V. Is it difficult to shoot at high speed? ; Implement "Recognize the fan to open the service room to implement the device to overcome the above-mentioned problems, such as the implementation of the second picture": at the same time as the point D, with a small capacity, spoon shot to install the 2 'servo valve 28 two-state • Cast = 1 shown in Figure 4 for high-speed injection. The difference in quantitative change + is explained below. 1 ^ stack injection device and 27 ^ 2 of the third flow path shown in the figure 2; ^ repeated casting machine injection equipment ^ shot starting 薏 "second action fluid increase teaches the first 2 ;: 6 factory" plus Action oil: The production side is added to make the action oil return more widely from the first-liquid rainbow chamber around the circuit (the first-king hydraulic cylinder 2 space s surround (run, for example, when the σ action fluid increase device) is reached 80. · Miniaturization at the oil stage. The low-speed injection control operation for the servo valve 28 can be used as the second operating fluid adding device of the present invention.

2197-5775-PF (Nl) .Ptd Page 23

2UU4U234U Fifth, the operating oil increase circuit of the description of the invention (19) The surrounding circuit 80 of the device is also used as the first operating fluid to increase the load and separate the operation of the invention. The flute is used to load in the injection device of the servo valve 28 which does not make a negative statement, and surrounds the dual-use. In the injection device of the embodiment, as described below, when the insufficient oil control of the operating oil 28 is used, the injection control is used as a complement to surround the loop. Because of doing very fast movements = add two no workers = =, _ set the return of the action oil, then I must be set;:; when the second degree of control is not necessary to do the action oil to increase the circuit and set the clothes around the circuit 8 ° . 7〇: ίί The first 3 of the hydraulic oil increase circuit to make a connection between: the three flow path 27 and the second flow path 26 connect the flow path 71 and the second far: Λ: connect the machine path 73 'and The 72-Yingyu valve 72 is connected to the output of the control device 4G. It is closed. Guard | Pei sets the control signal 4 6s2 of the output circuit 44 of the 40 to make the valve 28 parallel? The circuit 70 is opened by the electromagnetic control 藉 72, and the pressure source 30 or the accumulator 31 is directly supplied to the second flow path 26 with the feeding room. Road 71: The second 2 ′ is to increase the circuit 7 ° by setting the operating oil. By the second connection flow, the second: the injection device is not the same as the load, the movement from the servo valve 28 is: 28 = —flow path 25 At the same time as the second flow path 26, the operating oil from the temple service valve 28 is added, and the solenoid valve 72 is connected to the second flow path 73 to move the oil.

200402340 V. Description of the invention (20) The oil is supplied to the first flow path 25 and the second flow path 26. In the second embodiment, the operation is performed at the time of operation. The circuit of the hydraulic fluid increase circuit 70 is connected to the surrounding circuit of the supercharging control: the circling return of the iifrr hydraulic fluid increasing device has a first hydraulic cylinder with a reverse connection base and * 5 a side. It surrounds the flow path 81 of A, S, and The space of the magnetic secondary cylinder 2 in the flow path 81 is the front control of the discharge flow path 84 from the branch = 83 and the output of the μ electromagnetic control valve 82 and the control device 40 is output from the output circuit 44 of the control device 40. Alas, the corresponding control valve 82 is opened and closed. The king system flooded 4 6 s 3 so that the electromagnetic pilot check valve 83 was opened by the pilot operation, and the === pilot check valve 83 circuit 84 supplied to the surrounding flow path 81 was discharged to an external storage tank 85. ',,' & Oil discharge flow In the second embodiment, the circuit 8 is surrounded. The control is explained in the case of high-speed injection control. S Ran: Briefly explain the control action of =: 2 not: acupressure ^. · ', The control action is the same as the low-speed injection control electromagnetic "I two 82 is set to ::: is: 2 closing valve 23 is set to the closed state, _ actuator 28 closes the opening degree V !, and at a low speed; V? 3 shooting service; the valve opening degree of ^ is controlled to the first-疋 弟 # 连 # degree) moving injection piston 2197.5775-PF (Nl) .Ptd page 25 200402340

5 to move the plunger 63 toward the mold 60. At this time, the surrounding loop 80 control valve 82 is closed, and because the front check valve 83 is open, it is advanced through the magnetic plug 5 and discharged from the front end of the first hydraulic cylinder chamber 3 to the flow path 8 丨. The flow path 84 and the leading check valve 83 are discharged to the external storage tank 85. Zhayounan high-speed injection control (the operation of the loop circuit starts) The VT control device 40 detects from the detection information of the position detector 49 that the low, # m! Ϋ plunger 63 reaches the high-speed start point d, and the control device 4G Control signal, public second: output to actuator 28 &, in order to make the injection speed ¥ high-speed (° the first degree VI gray to the second valve opening degree V2, the flow rate of the operating oil is controlled. Open: Bianli 'Even if the valve opening degree is opened to the second valve opening degree V2, & cannot be done; speed; ^; and the miniaturization capacity of the control performance of the boost control = =. The operating oil insufficient for shooting control is from the surrounding circuit 4 conditions Lai; 疋, Gang Dang rapid high-speed injection control, so that the main plug 63 around the loop reached the high-speed start point!) The electromagnetic control No. 46s3 to the surrounding loop 80 ^ clothing set 40 output control signal 82. The electromagnetic control valve 82 is in the open state, and the 'open electromagnetic control%' is turned off, and the U-wound circuit 80 is the leader. However, the discharge from the first hydraulic pressure storage tank 85 is stopped. The operating oil on the side passes through the space S of the flow path 8 丨 and the piston rod 5ί of the living base 5. The space S is filled with the moving oil filling portion 21 from the injection tongue ^ 82, the return / hydraulic cylinder 2; the oil and the pressure are filled with the free space 6 between the base 6 and the free space. With this, in the air

200402340 V. Description of the invention (22) In S, the first fluid moving from the hydraulic cylinder 2 to the second via the flow path 8 1 flows back to the second fluid, and the operating oil supplied through the servo valve 28 and the check valve merges. As a result, the working oil-filled portion 21 (second speed) VH which has been fired to 3 moves. The flow rate of the working oil flowing back to the first fluid through the flow path 81 with the piston 5 and the plunger 63 at high speed is (^ a — § b) X l to the sectional area of the injection piston 5 side, and SB is the piston rod 5 a It is thought that the injection piston has 5 momentum. 'L is the displacement of the injection piston 5. As a result, the return of the operating oil from the servo valve 28 to the space s can be reduced, and the operating oil can be reduced and the load can be passed through the flow path 81. In other words, referring to FIG. 2, the negative expression of the oil: 彳 ΓΛ injection device's servo room ..., the rear door of the first hydraulic cylinder chamber 3, 66a, the electric control valve 82, and the return to the hydraulic cylinder 2 "The action of the interval s = the valve opening degree of the service valve 28 is reduced and the supply of Chagu oil is fast 'and the injection piston 5 is driven to the speed by the control flow of the servo valve 28. The stop control device surrounding the circuit After the injection speed V is switched to the high speed VH, the plunger 63 reaches the deceleration start point L, outputs a control signal 4 6s3, and closes the electromagnetic control valve 82 of the surrounding circuit 80 to stop the return of the operating oil to the space s. By The electromagnetic control = the closing operation of the valve 82, the leading check valve 83 is opened, and the operating oil supplied to the flow path 81 is discharged to the external storage tank 85 through the flow path 84 and the leading check valve 83. page 27 200402340 V. Description of the invention (23) The plunger 6 3 reached the decrementing μ speed (the third speed). The decompression plunger 63 is doing the injection, and the control is made. Do arbitrary control. ~ 〇 And the valve opening degree is gradual, and the booster control plunger 6 3 injection technology j # 物^ 49 ό ^ ι ^ W ^ 'P.I ^ ^ ^ lowered when the control device 40 detects from position detection to 4 y

SiM ^ ^ Wyl nu] When the position of the plunger 6 3 reaches the boost start position ", and when M is occupied, the control device 40 opens the valve opening of the control signal 4631 to the servo valve 28 to fch Sheng 1 actuates 28 and Make V3. At the same time, control # ^ ^ — the third valve opening degree with a large valve opening V2 ♦ θ ® μ pu π, set to 40 to open and close the on-off valve 23. Sincerely m — 与 # π ”When the valve opening degree is 3, refer to the second figure and make a piercing shot with the first beast of the hall it; pi L t on the t day, a large amount of operating oil is rapidly supplied. As a result, when the pressure of the booster piston 6 is increased toward the injection valve 5 ΛίΓΛ, the pressure of the booster piston 6 and the injection piston valve: 11 will increase and the check valve 2 2 will automatically close 1 Therefore, the injection piston 5 is pushed by the pressurizing piston 6 by the pressure boosting piston 6. The injection pressure ρ is __ large 鼾 屮 3 liters, and the maximum injection pressure (third pressure) Pmax is finally reached. Take the action of the hydraulic oil increase circuit. After the start, the slope of the injection pressure Pt (upward) is under the condition that the operating oil of the hydraulic cylinder chamber 4 is insufficient, and the control signal 仏 2 is output from the control unit 40 to the operating oil.

气 今 λ • Μ // 200402340 V. Description of the invention (24) Control valve 72, open the electromagnetic control valve 72. That is, when the control device reaches the pressure increasing start position M, and when the listening valve 28 is opened to the third opening degree 3, the electromagnetic control valve 72 is opened. The electromagnetic control valve 7 2 hits the door 0 ±, and the upstream of the brake is supplied to the third flow path 2 丄 2 =: == The first connection flow path 73 and the electromagnetic control valve 72 are directly supplied to the second and second J. The oil increase circuit 70 is supplemented. -As described by Shi Jie, in the injection device of the die-casting machine of the second embodiment, the surrounding circuit 80 is provided, and the reduction in size (miniaturization) of the feeding clothes 28 as in the first embodiment has been achieved. Injection speed: 1G 0. Increase the circuit 70 'with a working oil. * For oil pressure control and pressure increase. Third embodiment

Referring to Figs. 2 and 5 ', the injection device of the present casting machine will be described. I only complained about I out = 5 Λ table Λ this Λ Ming Λ Ming of the injection device of the injection device of the second form of injection control injection pressure waveform and injection speed waveform example. In the third embodiment, the injection device of the die-casting machine has the same structure as described in FIG. However, in the three embodiments, j 0 two shots :: the injection pressure waveform and injection speed of the industrial system; the waveform shown in Figure 3 of the formal parameter π is different, and the control device 40 (the processor = system processing) 'The contents stored in memory 42 are different. The contents are described below.

j / V. Description of the invention (25)-"No. 5Λ Table Λ of scale pressure pressure and injection speed waveform of die casting machine 1 歹 1« No time, the vertical axis represents injection speed (moving speed of injection 4) and casting pressure. The curve of the piston degree curve is used. The curve CP indicates the pressure curve curve. It indicates that the injection (moving) speed is as shown in Figure 5. The injection degree control of the die casting machine is as shown in the speed curve ν. At time = mi, the speed VL starts toward the mold. 6. Move the live t0 column for injection, and continue to move at a low-speed VL with the degree V, when the moving speed of $ 63 reaches the high-speed starting point!), ^ —, The low-speed VL of the plunger 63 Rise to the high-speed VH The speed V at which the two-way branching tool 60 moves at the high-speed VH state continues to move the moving speed starting point L of the movable base 5 and the plunger 63. Then, at the time point, the increase in the deceleration pressure rise Pressing action. Ding, casting of molten liquid filled in acupoints

The curve CX1 in Fig. 5 uses 2 as the burr pressure rise time curve), 矣 _ den ° ± 1 liter inverse curve (critical casting of good die-casting target casting ^ = parent f casting burr generation for casting materials and Decide, for example, dream from apricot =, according to the mold style and the product CX1 is the critical edge of the thin-walled product: two and measured from the page. An example of a curve of the critical pressure increase curve of the raw edge of the curved-wall product, the curve CX2 In order to be thick, although referring to the shots of the third embodiment of "Yashikami, A", the "shooting speed control and pressure control are aimed at the speed control system and the reference?", But the shot of Figure 5 〆 ..., as shown in Figure Z, the dismantling 杳 called ⑶, ⑴ the pressure rise control is different, and the control is the same as the low-speed injection control according to the curve 200402340 V. Description of the invention (26) The sleeve 62 is supplied to the casting machine! After the amount of the molten solution, the time is occupied: 0 ′ The feeding valve 28 is controlled by the control device 40 at the opening of the first valve. The pressure source 30 is supplied to the liquid tank 2 and the moving speed v is used at a low speed vl. Living base 5 and plunger 63 start to move. High-speed injection control, It is set to 40. The injection start point is 0. The position detector 49 is successively monitored. The position is detected by 49. The time point t = tl. The plunger 63 reaches the high-speed control: the device 40 will be larger than the first valve opening degree V1.阙 Opening degree: == 6sl is output to the actuator 28a of the servo valve 28, so that the speed V in the plunger becomes high speed, and the valve opening degree of the servo valve 28 is enlarged. L The operating fluid flow of the first hydraulic red chamber 3 is increased and injected. Using live sincerity Qiu: 3 1 The starting point D is the first two percent of the molten liquid ejected from the sleeve 62 to the cavity 61. As described in the first embodiment, the position detector 49 detects the shell. Howling is judged in the control device 40. Switch to the 'control device 40', and cut the moving speed of the plunger 63 to 7 and ask, so that the melting liquid starts to fill the mold cavity 61 rapidly. The moving speed v is switched to high speed VH, the molten liquid begins to be filled. At short, the cavity 61 is filled with molten liquid. At time t = t2, the column base 63 stops advancing, the injection speed drops sharply, and at the third speed, the control device 40 can move from the position detector. The position of the plunger 63 detected by 49 is a deceleration start point L at which a deceleration start is detected. The moving speed ν of the plunger 63

200402340 V. Description of the invention (27) When decreasing, the casting pressure CP increases. The slope (change) of the speed Vd of the plunger 63 that is decelerated is controlled by adjusting the valve opening degree of the servo valve 28 by the control device 40 as described above. The moving speed V of the pressure control plunger 63 is relatively low, the position of the plunger 63 reaches the boosting start position S (time point t = t3), and at the same time as the control device 40 opens the on-off valve 23, the servo valve 28 is further opened to The third valve opening degree V3 can supply operating fluid to the first hydraulic cylinder chamber 4 and start boosting. That is, when the servo valve 28 is opened to the third valve degree, a large-flow operating fluid is rapidly supplied to the first flow path 25 and the first flow path 26. Thereby, the on-off valve 23 provided in the second flow path 26 is opened, and the operating fluid is supplied to the second hydraulic cylinder chamber 4 through the on-off valve 23. When the operating fluid is supplied to the second hydraulic cylinder chamber 4, the booster piston 6 advances to the injection piston 5 uranium. When the pressure-increasing piston 6 advances, the pressure of the operating fluid in the space s between the pressure-increasing piston 6 and the injection base 5 increases, and the check valve 22 is automatically closed. As a result, the fluid flowing to the first hydraulic cylinder chamber 3 through the first flow path 25 is blocked. The space s between the pressure-increasing piston 6 of the second hydraulic cylinder chamber 4 and the injection pistons 5 of the first to third cylinders 3 is hermetically closed, and is raised to the detected pressure by the pressure detector 48. A control device 40 continuously adjusts the valve opening degree of the servo valve 28 in order to make the casting pressure CP represented by the pressure information 48s of the pressure detector 48 follow the burr critical pressure increase curve (^ 1, CX2). The control signal that is changed stepwise is output to the actuator 28a. Specifically, in the case of the α-portion of the thin layer of the control device 40, such as the burr critical pressure increase curve CX1, the casting pressure rises sharply and in a thick-walled product. Case, such as burr critical boost curve

2197-5775-PF (Nl) .ptd p. 32 200402340

CX2 "The pressure gradually rises, so the valve opening of the servo valve 28 is controlled in this way, so the memory 42 of the second control device 40 stores the control program and control information. The control device 4G controls the pressure CP following the gross and critical boost curve, and the pressure cp reaches the setting t31 or t32). When the time is set to make the clothing 40, the pressure does not follow the critical pressurization curve of the hair. According to the pressure information 48s of the pressure 48, the pressurization time T1 from the start of the pressurization / = up to the casting pressure CPs. , T2 is a set time, and ^, controls the valve opening degree of the servo valve 28. In order to perform such control, for example, “measure the pressure increase time n, T2 at this time, and the change of the valve opening degree” and the pressure measured by the pressure detector 48: and store it in the control unit 40 In the memory, according to the amount of data, the control device 40 controls the device 40 to determine the next increase; = __28 of 28, in the second setting of the boost time: control device_data The actual measurement of the casting made in the previous "control: valve opening degree in the secondary boost control. The final version, ~ the pressure setting pressure CPs indicated by the pressure information 48s of the pressure detector 48, control device 40. The valve 1 of the control servo valve 28 flows to the supercharging piston 6 which is inserted in the second hydraulic cylinder chamber 4 and is limited, and is maintained at the set casting pressure C ps. In other words, the control device 40 adjusts the flow of the servo valve 28 to the pressure-increasing piston 6 inserted in the second hydraulic cylinder chamber 4 to be blocked, or the operating oil flows from the first hydraulic cylinder chamber 3 The line leak is used to supply the liquid to replenish the leaked part.

200402340 V. Description of Invention (29) " " " " As described above, the control device 40 can maintain the casting pressure cp at the set casting pressure cps by appropriately controlling the degree of the servo valve 28. When the casting pressure CPs is set and the valve opening degree of the valve 28 is appropriately controlled by the control device 40, it can be changed within the range of the set pressure of the accumulator 31. As described above, “the low and high speed control can be performed immediately by the valve opening degree control of the feeding valve 28 of the evil injection device of the third embodiment having the structure illustrated in FIG. 2” from the deceleration start point L Deceleration control, supercharging control starting from point S of supercharging. The advantages of real-time control of the injection device have been described in the first embodiment. '' Also, as in the third embodiment, the valve opening degree change of the feeding valve “by the control device 40 can also be switched from speed control to boost control. Then, as in the third embodiment, The control performed in order to immediately follow the values indicated by the critical pressure rise curves CXI and CX2 of the casting pressure can suppress the occurrence of casting burrs and obtain a good die-cast product. The injection device of the third embodiment is the same as the first embodiment As described in the aspect and the second embodiment, by implementing the most appropriate control described above, the structure of the hydraulic device 20 can be simplified, and the cost of the injection device of the die-casting machine can be greatly reduced. The fourth embodiment refers to FIG. 4 and FIG. FIG. 5 illustrates the injection device of the die-casting machine according to the fourth embodiment of the present invention. In the fourth embodiment, the injection device of the die-casting machine is the same as the structure described with reference to the fourth figure. In the embodiment, for example, refer to

V. Description of the invention (30) As shown in Fig. 5, since the injection system refers to Fig. 3, it is different from the output pressure waveform and injection velocity waveform. The waveform described in 埴 t ^ is the control point η of the control device 40. The contents of the control processing program memorized by the oblique two straight meat ί body 42 are different. The contents are described below. Lingbu

Figure 5 is an example of the main-A shape as shown above. The "escape" indicates an ejection pressure waveform and an ejection speed wave. The ejection device shown in Fig. 4 will be described. In the low-speed injection control, $ = ί = The injection piston 5 and the plunger 63 are moved at a low speed. This put. Therefore, by injection == 82 closing, the forward check valve 排出 is discharged to the surrounding circuit H for the pressure-cylinder chamber 3 to be forwarded by 60, and the working fluid from the first fluid. ^ P1 〇〇 ^., Passes through the flow The path 84 and the leading side stop valve 83 are discharged to an external storage tank 85. ^ High-speed injection control The plunger 63 reaches the high-speed start point β, 28, so that the speed center of the plunger 63 becomes high-speed = set = two valve start point D, from the control device 4. J: 63 reaches the two-speed ⑽ electromagnetic control 阙 82, and opens the electromagnetism = output to the leading check valve 83 surrounding the circuit 80 is closed ^. Then 2 ° and 'surrounding back to the cylinder = skin-expulsion drive; at 0:00, from the-liquid si connected back to the injection live V side two sides; ^ 查 Γ 通 ^ through the flow The recirculated working fluid merges with the supplied working fluid within one passage S. From the first valve J8 and the check valve 22

The end of the cylinder to 3 is returned to the space S 200402340 Invention description (31) The operating fluid volume is (SA-SB) XL, where SA is the cross-sectional area of the injection piston 5 'SB is the cross-sectional area of the piston rod 5a, and L is The amount of movement of the injection piston 5 ° As described in the first embodiment, the liquid flows back from the first hydraulic cylinder chamber 3 through the flow path 8 1 to the space S, so that the capacity (size) of the servo valve 28 is only] and Since the control flow rate of the servo valve 28 is reduced, the injection piston 5 and the plunger 63 can be driven at a very high speed. When the loop circuit is stopped, switch to the high-profile position. After the plunger reaches the deceleration start point l, use the liquid :: ΐ Close the solenoid control valve 82 of the loop circuit 80 to stop the air flow. At the same time, the control device 40 opens the front pilot check valve 83, and allows the operating fluid of the drive circuit 81 to pass through the flow path 84 and the storage tank 85 outside the drive port. Stop the delay valve 8 3, and discharge to the degree νΛ; 6 rate 3 to the rear 'decelerate the injection speed of the plunger 63 to adjust and the servo valve made by the control device 40 is opened to the degree of the feed valve 28 The two states are the same, and the high-flow operation bar two welfare # is also sometimes supplied to the second hydraulic cylinder a / as in the second embodiment. 'The second speed is supplied to the second flow path 26, and the action plug 5 advances. The pressure between the pressurizing piston 6 inch hunting / pressurizing piston 6 and the injection piston 5 is "pressing the moon = upper guard", because the pressure increasing piston 6 and the injection operating oil increase the operating reverse valve 2 2 Automatically shuts down. The control device 40 implements each control of the fish.

200402340

After the start of the control, the oblique supply of the casting pressure to the first: When the hydraulic cylinder chamber reaches the opening of the booster valve through the electromagnetic control through the booster valve 28, the servo section passes through the first-stage path 2 6 and is sent by the operating oil. state. η: The U control room 72 of the signal 46s2 output to the operating oil increase circuit 70 is opened. That is, the position of the plunger 63] = the point S, and the control device 40 opens the servo valve 28 to the same position. The magnetic control unit 72 is opened. tElectromagnetic control valve 2 is opened, and the upstream of the service valve 28 is supplied to one of the operating fluids of the third fluid. The first connection channel 71 and the electromagnetic control valve 72 are directly supplied to the first. As a result, among the flow rates through the servo valve 28, the insufficient flow rate increase circuit 70 is supplemented. The injection device of Mingzhi's die-casting machine is not limited to the above-mentioned embodiment. In the above described embodiment, the servo valve 28 is used as the control valve of this Maoming, but it is not limited to this. For example, as a control valve, a proportional solenoid valve, a digital valve, a mechanical control valve and other control valves that can instantly control the valve opening degree are applicable. ^ In the present invention, the speed and pressure can be controlled in real time, and a die casting machine injection device having an inexpensive and simple hydraulic device is obtained. ^ In the present invention, it is possible to reduce the size (smaller capacity) of control valves such as the servo valve 28 and increase the injection speed. Also in the present invention, a die-cast product having less burrs can be produced stably.

2197-5775-PF (Nl) .ptd

200402340 Brief Description of Drawings Figure 1 is a structural diagram of an injection device of a die casting machine of the conventional technology. Fig. 2 is a structural diagram of a first embodiment of the injection device of the die casting machine according to the present invention. Figures 3A to 3E show examples of injection pressure waveforms and injection speed waveforms in the first form of injection control in the injection device of the die casting machine of the present invention. Fig. 4 is a structural diagram of a second embodiment of the injection device of the die casting machine according to the present invention. Fig. 5 shows an example of an injection pressure waveform and an injection speed waveform in the injection control of the second embodiment in the injection device of the die casting machine of the present invention.

The sign says,

1 ~ die-casting machine; 2-hydraulic cylinder; 3 ~ first hydraulic cylinder chamber; 4 ~ second hydraulic cylinder chamber; 5 ~ injection piston; 5a ~ piston rod; 6 ~ booster piston; 21 ~ action oil filling Part 2 2 ~ Check valve; 23 ~ On-off valve; 2 5 ~ First flow path; 26 ~ Second flow path; 27-, Third flow path; 28 ~ Servo valve; 28a ~ Actuator; 2 8b ~ Valve Openness detector 3 0 ~ hydraulic pressure source; 31 ~ pressure accumulator; 40--control device; 41 ~ processor; 42--memory; 43 ~ input circuit; 44-, output circuit; 46 ~ amplifier; 4 6 s 1 ~ control signal; 4 6 s 2 ~ control signal; 4 6 s 3 ~ control signal; 45 ~ display; 2197-5775-PF (Nl) .ptd page 38 * ^ / · > / 200402340 Figure Brief description of the formula 47 ~ data input device; 48s ~ pressure information; 4 9 ~ position detector; 49s ~ position information; 6 0 ~ mold; 61 '. Mold cavity; 62 ~ injection sleeve; 6 3 ~ injection plunger; 70 ~ action oil increase circuit; 7 1 ~ first connection flow path; 72 ~ solenoid control valve; 73 ~ second connection flow path; 8 0 ~ surround Circuit; 81, v surround flow path; 82 ~ solenoid control valve; 83,-front check valve; 84 ~ discharge flow path; 85--storage tank; 100-~ die casting machine; 110 ~ mold; 11 1 ~ cavity 112 ~ injection sleeve; 113-... injection plunger; 114 ~ liquid supply port; l 1 5-^ long handle structure, 120 ~ hydraulic cylinder; 121, '-injection hydraulic cylinder chamber, 1 2 2 ~ injection piston; 123 ~ Hydraulic cylinder chamber for pressure boosting 124-~ Booster piston; 125 ~ rod; 130 -... Hydraulic device; 131 ~ Hydraulic pressure source; 1 3 2 ~ Pressure accumulator; 135 ~ Hydraulic check valve; 136 -… Non-return valve; 137 ~ injection speed adjustment valve 1 3 8 ~ solenoid coil; 139 ~ encoder; 140, control circuit; 300 ~ hydraulic device.

2197-5775-PF (Nl) .ptd Page 39

Claims (1)

6. Scope of patent application i An injection device of a die-casting machine, including an action fluid supply device (^, dagger:-plunger (6 ... dazzle the metal; = action fluid; a hydraulic cylinder (2)) The household is injected into the puller; it passes through the first hydraulic cylinder chamber and has a pressure cylinder chamber (3) and a pressure cylinder chamber (4); a second liquid-first piston with a larger diameter (5) Inserting the above-mentioned moving and freely inserting 1 main plug (63) into the above-mentioned mold; 逑 苐 a hydraulic cylinder chamber (3) and a second piston (6), as described above and above The direction of the plunger (63) is located while the a-piston (5) is pushed against the upward-moving cylinder chamber (4), and has a second fluid-first flow path device (25 / soil ( 5) The large-caliber plug (5) and the second piston, one end communicates with the space in the first movement), and moves the first piston from the hydraulic cylinder (two between the aforementioned action = limiting movement) ; '/ ,,,, and 6 devices supply the operating fluid to the empty second flow path device (2 6, in the above-mentioned second hydraulic cylinder chamber (= 间 尚 置 m, '28a, 28b Cylinder chamber (4), in order to make the second) movable = connected to the direction where the second hydraulic plug (5) is located, from) to the first and second hydraulic cylinder chamber ( 4) f The other end of the actuating liquid supply device for supplying the actuating liquid tongue device and the above-mentioned second flow path device 丄 s :: the first to the above-mentioned flowing liquid supply device, so that And the second action fluid supplied by the second action fluid supply device, the above-mentioned action fluid change of road attack device; wheel 200402340 6. Patent application scope A check valve (22), which is arranged above the above STS force, so that The above (25) set (2 丄) of the operating fluid stops; L to the control valve assembly and 帛 ㈤ 阙 (23) 'are arranged in the above-mentioned first, sixth, and first flow path devices · a control device ( (40), ..., the control device is based on the predetermined injection control valve device (28) and the first J out of two method, and controls the operating fluid supply device to (23), and controls the space ⑻ and the first Two ^ The above liquid ^ (2) system further controls the plunger (63) to ( 4) Acting fluid 2. If the patent application scope item Γ is shifted by two speeds Λ and pressure, it also includes: " Injection Pei of the die casting machine, a fourth flow path device (8 丨) The front end and The above-mentioned space (s) is connected to the first hydraulic cylinder chamber (3), a second on-off valve (82), and is located here; and a 4 以及 four-flow road farm (81) and a first operating fluid adding device ( 8, and Lu Xuzhi (81) expelled the action fluid from the shooter 彳 owed the above-mentioned fourth flow (pilot check valve) (83)., Before the control device of the check valve was set, when the above, '第The two on-off valves (82) are open: when the separation and moving speed becomes high, the operating fluid at the front end of the upper chamber (3) is returned to the above-mentioned * and the above-mentioned hydraulic cylinder 3. As described in item 2 of the scope of patent application : Ejection device of prayer press, 2197-5775-PF (Nl) .ptd 2U04U2340 Among them, when it is mentioned from the low-speed control that the second on-off valve is in the open position 4. If the patent application device is used, it further includes: When the direction is high-speed control, the control device is in the up state. Surround the injection molding machine (7 ,, (25, 27) and Article) of the die casting machine described in item 1, 2, or 3, and connect the first flow path device and the flute device (26, 27). ); And (72), the third flow path device (71) from the above-mentioned one) has a three-way switching valve (71); the operating liquid of the first liquid supply device is supplied to the above-mentioned control device, and when the volume of the operating liquid increases, the : The state of the second hydraulic cylinder chamber "). The second on-off valve (7 2) is in an open state 5 · If the patent application scope of the first production device 'It further includes: pressure detection device (4 8), position A detection device (4 g); and the injection of the die casting machine according to item 2, 3, or 4 to detect the pressure in the space; a detection device (2 8 b) for detecting the opening position of the displacement valve of the plunger (63) Detect the valve opening degree of the control body (28); the control device (4 η 1 #cognition, a! _ _ ^ U) is inputted with a measurement roar number of the valve opening degree detection device, and the above-mentioned control M is performed continuously. The position detection of the fir detection device, but the position of the speed control speed is described in detail. ^ ^ 1 ^^ τ knife change Control, input the pressure detection signal of the above pressure detection device and implement pressure control 2197-5775-PF (Nl) .ptd Page 42 200402340 6. Scope of patent application --------- Lebanon 6. Please request injection of the die casting machine described in the patent scope No. 1, 2 or 3 Device 'wherein the above-mentioned control method includes: a first, a control program, which moves the above-mentioned plunger (63) to the above-mentioned mold to a first-position with a first-middle degree via the above-mentioned cold; 5.) t The first control is private sequence, the front end is toward the second position of the mold cavity of the melting tool, and the plunger moves the plunger toward the mold at a fast second speed, and the second melt is filled in the mold. The mold cavity is filled with the & towel to make the upper U cavity sequence 2 The above-mentioned melt is completely filled in the mold plunger; #a piston, and the above-mentioned control device is pushed by the above-mentioned -piston. In this control program, a state is described in the control room device control: the first closed at the -3rd: the above control valve is set to be controlled to be opened; the middle of the above-mentioned first-switch room device It becomes the third valve opening degree, and the two control valve device is a second flow path device having a larger opening degree than the second valve. The method of opening the operating fluid of the first switch 阙 to the above position, wherein the casting diameter of the casting machine of the casting machine described in the above or 3 items includes: 2197-5775-PF (Nl) .ptd I 页 page 43 200402340 Sixth, the scope of patent application-a first control program, at a first speed by moving the above-mentioned plunger ⑻) to the above mold: to one of V-a stopper-a second control program, the front end is filled to the above mold The second position of the cavity of the mold, and the column: a second speed at which the starting speed is fast causes the plunger to move toward the mold and "quick melt liquid fills the cavity of the mold"; and The third control program is used to drive the second piston to fill the mold plunger when the molten cavity is pressed. The first piston is pushed by the first piston to push the control to the first control. In the program, the control valve is installed, and the first on-off valve is closed during the second control process; the first valve is controlled at the opening degree; the second valve with a large first valve opening sounds, and the control valve is opened. The device is controlled at a specific operating fluid The same as the above space 7: The second switching valve (8 sweat of the above-mentioned first operating oil increasing device C8 0) provided through the control valve device returns the cylinder chamber (5) to the above-mentioned space M to make the operating fluid from the first hydraulic pressure 8 · If the scope of patent application is No. 3. Wherein the control device is the injection device of the die casting machine described in the first and the above, the valve device is larger than the opening degree of the second valve: in a control program, the control valve device is controlled to provide an operating fluid. To the valve opening 纟 'and the third via the above-mentioned oil control increasing device ⑺):;) =)' Open the above-mentioned second action ^ U ^ 'and move the action fluid from above 2197-5775-PF (Nl) .ptd No. 44 Sixth The operating fluid supply device described in the scope of the patent application is supplied to the second liquid cylinder chamber (4). 9. As stated in the statement, the injection control of the die-casting machine described in item 6, 7, or 8 above, the first control program has the following function: to push the plunger according to a predetermined predetermined pressure characteristic as Cheng Zhaoshang, Cai, and Shuming of the burr critical boost curve turn in the detection value of the pressure detection device, and adjust the valve opening device of the valve control device in accordance with the degree and / or the predetermined i-force. °. As stated in Zhongshen ’s request, the control device is shown in the above sequence: In the sequence, the increase time is set, and the upper valve is opened: the increase time is set to adjust the control valve for force detection. Device: = = The time elapsed in the program, the valve opening degree changes, τ I, the output of the I force is doubled, the above-mentioned control valve device information, according to the set u ^ t boosting program, referring to the stored information degree. After the pressurization time adjustment of the control valve device, the valve opening die-casting of the above-mentioned control valve device 1 of the machine 2 is out of the 6, 7, 8, 9, 10 or as described by the member, and then moves to the system; Read the degree of control in the second control program to adjust the above control; ': hit, according to the knowledge, the valve opening degree of the deceleration speed service valve control device for deceleration of the above-mentioned plug.