WO2022070507A1 - Dispositif d'injection pour machine de moulage sous pression et procédé de moulage - Google Patents

Dispositif d'injection pour machine de moulage sous pression et procédé de moulage Download PDF

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Publication number
WO2022070507A1
WO2022070507A1 PCT/JP2021/020606 JP2021020606W WO2022070507A1 WO 2022070507 A1 WO2022070507 A1 WO 2022070507A1 JP 2021020606 W JP2021020606 W JP 2021020606W WO 2022070507 A1 WO2022070507 A1 WO 2022070507A1
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WIPO (PCT)
Prior art keywords
suction
plunger
sleeve
recess
tip
Prior art date
Application number
PCT/JP2021/020606
Other languages
English (en)
Japanese (ja)
Inventor
工成 村上
直樹 石橋
祐一郎 釼
悠生 宮本
貴司 棟久
Original Assignee
宇部興産機械株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宇部興産機械株式会社 filed Critical 宇部興産機械株式会社
Priority to CN202180060609.6A priority Critical patent/CN116133773A/zh
Publication of WO2022070507A1 publication Critical patent/WO2022070507A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/14—Machines with evacuated die cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment

Definitions

  • the present invention relates to an injection device that injects molten metal toward the cavity of a die casting machine by a plunger that can move forward and backward inside the sleeve, and a casting method by die casting.
  • Patent Document 1 describes a die casting machine that sucks the inside of a sleeve using a vacuum suction device.
  • Such die casting machines are equipped with first to fourth suction devices for sucking the inside of the sleeve and the cavity of the mold.
  • a first suction device and a second suction device are used for suction inside the sleeve.
  • the first suction device sucks the inside of the sleeve through an opening penetrating the sleeve in front of the pouring port into which the molten metal such as an aluminum alloy is injected.
  • the second suction device sucks the inside of the sleeve from the rear side of the plunger tip through the suction pipe connected to the through hole that penetrates the flange provided in the plunger rod in the axial direction.
  • the through hole of the flange communicates with the closed space formed between the constriction between the rear end of the plunger tip and the flange and the inner peripheral surface of the sleeve.
  • Patent Document 1 by sucking the closed space with the second suction device, the front side of the tip is sucked through the gap between the outer peripheral surface of the tip and the inner peripheral surface of the sleeve.
  • Patent Document 1 when the plunger advances to a position where the pouring port is closed by the plunger tip after injecting the molten metal into the sleeve, first, through the opening of the sleeve, the first suction device causes the tip in the sleeve to be more than the tip. Aspirate the gas in the space in front. At this time, the gas in the cavity is also sucked through the space in front of the sleeve. Then, when the plunger advances to the position where the opening of the sleeve is closed by the tip, the second suction device causes the second suction device to move from the rear of the tip to the closed space at the constricted portion and the gap between the tip and the sleeve to the tip.
  • the third suction device initiates direct suction of the cavity.
  • the fourth suction device is used for suction of the internal space of the base that supports the movable type.
  • the opening for suction may be blocked due to the adhesion of droplets of the molten metal, or the molten metal component to the vacuum line. Accumulation of (molten residue) may cause a decrease in suction efficiency. In addition, there is a concern that entangled nests may occur due to the rampage of the molten metal.
  • Rapiding of molten metal means that, for example, the outside air blows in front of the tip from the rear end of the sleeve through the radial gap between the plunger and the sleeve, causing the molten metal to foam and scatter or the surface of the molten metal to shake violently.
  • Patent Document 1 in order to efficiently evacuate the inside of the sleeve and the cavity, the inside of the sleeve is filled with suction by the first suction device, which has higher suction efficiency than the second suction device, before the suction by the second suction device.
  • the pressure is reduced at once. Since the outside air flows in due to the pressure difference between the space in front of the tip given at this time and the outside air, it leads to the rampage of the molten metal.
  • the suction by the first suction device and the suction by the second suction device are stopped at predetermined timings, but the outside air is in front of the tip while the suction in the sleeve is stopped. It will flow into the hot water and lead to the rampage of the molten metal.
  • the present invention is an injection device including a sleeve to which molten metal is supplied inside and a plunger that can move forward and backward inside the sleeve, and ejects molten metal toward a cavity of a die casting machine by the plunger.
  • the plunger comprises a tip that pushes the molten metal in the sleeve forward and a rod that supports the tip from the rear.
  • the sleeve penetrates the sleeve inward and outward and comprises two or more suction ports arranged in the anteroposterior direction.
  • the plunger has a tip body that includes at least the front end of the tip, a suction recess that is retracted radially inward with respect to the inner peripheral portion of the sleeve behind the tip body, and a suction recess that protrudes radially outward with respect to the suction recess. It includes a tip rear portion that partitions the suction recess from the rear side, and a rear suction path that communicates with the suction recess from behind the tip rear portion.
  • the injection device of the die casting machine of the present invention includes a sleeve in which the molten metal is supplied to the inside and a plunger that can advance and retreat in the front-rear direction inside the sleeve, and the injection device injects the molten metal toward the cavity of the die casting machine by the plunger. It is a device.
  • the plunger comprises a tip that pushes the molten metal in the sleeve forward and a rod that supports the tip from the rear.
  • the sleeve penetrates the sleeve inward and outward and comprises one or more suction ports aligned in the anterior-posterior direction.
  • the plunger has a tip body that includes at least the front end of the tip, a suction recess that is retracted radially inward with respect to the inner peripheral portion of the sleeve behind the tip body, and a suction recess that protrudes radially outward with respect to the suction recess. It includes a tip rear portion that partitions the suction recess from the rear side, and a rear suction path that communicates with the suction recess from behind the tip rear portion.
  • the injection device comprises a control unit configured to control the operation of a suction system capable of suction through each of one or more suction ports and a rear suction path.
  • the control unit sucks from the suction recess through at least one of the suction port and the rear suction path after the sleeve pouring port is closed by the rear part of the tip, based on the position of the plunger or the elapsed time from the start of injection by the plunger. Is started, and after the suction from the suction recess is started, suction is started from the front space, which is the space in front of the chip body, through the suction port, and the suction port is the farthest from the pouring port among one or more suction ports.
  • the suction from the suction recess is started through the rear suction path, or the suction is continued before the suction stop of the suction port, at least from the speed control. Continue until the plunger reaches the switching position to pressure control.
  • the control unit continues suction from the suction recess through the rear suction path until the filling of the molten metal into the cavity is completed. For example, if a signal indicating the arrival of the plunger at a velocity pressure switching position close to the position of the plunger at the completion of filling is generated, the valve corresponding to the rear suction path can be closed from the suction recess through the rear suction path. It is good to stop the suction. By doing so, suction from the suction recess can be continued until substantially filling is completed.
  • the valve corresponding to the rear suction path can be closed to suck the suction from the suction recess until the filling is completed. Can be continued.
  • the sleeve includes two or more suction ports arranged in the front - rear direction, the projected area of the suction port to the suction recess is A1, and the projection of the rear suction path to the suction recess.
  • a 1 corresponds to the projected area of the suction port when projected onto the suction recess from a direction orthogonal to the axial direction of the sleeve.
  • a 2 corresponds to the projected area of the rear suction path when projected from the axial direction of the sleeve onto the suction recess.
  • the present invention is a casting method including an injection filling step of injecting and filling the molten metal into the cavity of the die casting machine by a plunger capable of advancing and retreating in the front-rear direction inside the sleeve to which the molten metal is supplied inside.
  • the sleeve comprises a tip that pushes the molten metal in the sleeve forward and a rod that supports the tip from the rear, the sleeve penetrating the sleeve inward and outward, and one or more aligned in the anterior-posterior direction.
  • the plunger has a tip body that includes at least the front end of the tip, a suction recess that is behind the tip body and retracts radially inward with respect to the inner circumference of the sleeve, and a suction recess that is radial with respect to the suction recess. Includes a rear end of the tip that projects outward of the tip and partitions the suction recess from the rear side, and a rear suction path that communicates with the suction recess from behind the rear of the tip.
  • the injection filling step is based on the position of the plunger or the elapsed time from the start of injection by the plunger from the suction recess through at least one of the suction port and the rear suction path after closing the sleeve pouring port by the rear of the tip.
  • the second step of starting suction from the front space which is the space in front of the chip body through the suction port after the start of suction from the suction recess, and one or more suction ports.
  • the suction from the suction recess is started through the rear suction path, or the suction is performed before the suction stop of the suction port. It includes a third step of continuing from, and at least a fourth step of continuing suction from the suction recess through the rear suction path until the plunger reaches the switching position from speed control to pressure control.
  • the fourth step in the casting method of the present invention it is preferable to continue suction from the suction recess through the rear suction path until the filling of the molten metal into the cavity is completed. Therefore, for example, when a signal indicating the arrival of the plunger at the speed pressure switching position is generated, the valve corresponding to the rear suction path is closed, or when the filling completion is detected based on the casting pressure, the rear suction is performed. It is preferable to stop the suction from the suction recess through the rear suction path by closing the valve corresponding to the path.
  • suction is continued from the suction recess before and after the position where the suction port farthest forward from the pouring port reaches the stop of suction through the closure by the rear part of the tip. It is preferable to give a small pressure difference between the front space and the suction recess with respect to the pressure difference between the front space and the outside air.
  • the injection filling step includes a low-speed injection step of moving the plunger at a relatively low speed and a high-speed injection step of moving the plunger at a relatively high speed. It is preferable to temporarily stop or temporarily decelerate, and to perform suction from the suction recess through at least one of the suction port and the rear suction path before and after stopping or decelerating the plunger.
  • the suction path is rearward from the rear of the suction recess.
  • FIG. 1 It is a side view of the partial break which shows the injection apparatus which concerns on embodiment of this invention, and the die casting machine provided with it.
  • FIG. 1 It is a schematic diagram which shows the vacuum suction system provided in the die casting machine shown in FIG. 1.
  • FIG. 1 It is a figure which shows the sleeve and the plunger tip of the injection apparatus shown in FIG. (A) and (b) are graphs showing changes in the speed (solid line) and casting pressure (broken line) of the plunger in the injection filling step and the pressure increasing / holding step.
  • A) is a figure which shows the state which the projection area of a suction port to a suction recess is the maximum.
  • (B) is a diagram showing a state in which the projected area of the suction port to the suction recess is the minimum.
  • (C) is a diagram showing a state in which one of the suction ports is open to the atmosphere. It is a graph which shows that the projected area of a suction port to a suction recess changes according to the position (injection stroke) of a plunger. It is a figure for demonstrating an injection filling process, and (a) shows a plunger in the in-situ. (B) shows the position of the plunger to start the vacuum suction in the sleeve after the pouring port is closed by the rear part of the tip.
  • FIG. 7 is a diagram showing how the plunger advances in the order of (a) to (c) following FIG. 7 (c).
  • the suction port (# 2) farthest from the pouring port is closed by the rear part of the tip.
  • A) shows how the plunger advances toward the speed pressure switching position XVP while continuing the suction from the suction recess.
  • B) shows a state in which the plunger reaches the speed pressure switching position XVP .
  • C shows the plunger returned to the original position.
  • FIG. 1 It is a side view of the partial break which shows the injection apparatus which concerns on the modification of this invention, and the die casting machine which provided with it. Only one suction port is formed on the sleeve.
  • A) shows a state in which the pouring port is closed by the rear part of the tip and suction can be started through each of the suction port and the rear suction path.
  • B) shows a state in which the suction port is closed and suction is continued only through the rear suction path.
  • the die casting machine 1 includes a movable platen 3 in which a movable mold 2 and a product extrusion mechanism 2A are installed, a fixed platen 5 in which a fixed mold 4 is installed, and a machine base 6 that supports the movable platen 3 and the fixed platen 5.
  • a mold opening / closing / molding mechanism (not shown), an injection device 10 provided in the fixing plate 5 for injecting molten metal toward the cavity 7, a vacuum suction system 30 (FIG. 2), and operation of components of the die casting machine 1. It is provided with a control device 40 for controlling the above.
  • the die casting machine 1 uses a vacuum suction system 30 to suppress the generation of cavities (entanglement cavities) due to the entrainment of gas in the molten metal, and the cavity 7 and the sleeve 11 of the injection device 10 communicating with the cavity 7. Vacuum suction can be performed from the inside and from the inside.
  • a cavity 7 (product part) is formed between the movable mold 2 installed on the movable plate 3 which moves freely along the tie bar 3A and the fixed mold 4.
  • a suction portion 8 that communicates with the cavity 7 and connects the vacuum pipe of the vacuum suction system 30 is provided.
  • the suction unit 8 is provided in, for example, a Chill-Vent.
  • the suction unit 8 may be a vacuum valve. While the inside of the cavity 7 and the sleeve 11 is depressurized by the vacuum suction system 30, the injection device 10 injects molten metal such as aluminum or an aluminum alloy toward the cavity 7 and fills the cavity 7 for casting molding. The goods are manufactured.
  • the injection device 10 includes a sleeve 11 to which molten metal is supplied inside, a plunger 20 that can move forward and backward with respect to the sleeve 11 inside the sleeve 11, and a drive source such as a hydraulic cylinder (not shown) that drives the plunger 20.
  • a drive source such as a hydraulic cylinder (not shown) that drives the plunger 20.
  • the front side F in the moving direction of the plunger 20 when injecting the molten metal that is, the side F near the cavity 7 is defined as “front”, and the side B far from the cavity 7 is defined as “rear”. That is, the plunger 20 advances and retreats in the front-rear direction D1.
  • the sleeve 11 is a cylindrical body that extends linearly.
  • the axial direction of the sleeve 11 coincides with the front-rear direction D1.
  • the front side of the sleeve 11 penetrates the fixing plate 5 and communicates with the gap 41A of the mold sleeve 41 provided in the fixing mold 4.
  • the rear side of the sleeve 11 protrudes to the outside of the fixing plate 5 and extends horizontally toward the rear.
  • a pouring port 110 into which the molten metal is injected by a ladle (not shown) is provided in the vicinity of the rear end 11B of the sleeve 11.
  • the pouring port 110 penetrates the upper part of the peripheral wall 111 of the sleeve 11.
  • the hot water storage chamber is configured to include a space in front of the tip 21 in the sleeve 11 (front space 112) and a gap 41A of the mold sleeve 41. This hot water storage chamber communicates with the cavity 7 via the runner 42 and the gate 43.
  • a plurality of suction ports 101 and 102 penetrating the inside and outside of the sleeve 11 are formed on the peripheral wall 111 of the sleeve 11.
  • Each of the suction ports 101 and 102 is individually connected to the vacuum pipe of the vacuum suction system 30 (FIG. 2).
  • the suction ports 101 and 102 are arranged in the front-rear direction D1 in front of the pouring port 110 on the peripheral wall 111, and both penetrate the peripheral wall 111 in the thickness direction.
  • they are referred to as a first suction port 101 (# 1) and a second suction port 102 (# 2) in order from the side closest to the pouring port 110.
  • the first suction port 101 and the second suction port 102 are arranged on the upper part of the peripheral wall 111, avoiding the positions where they come into contact with the molten metal M. According to the plurality of suction ports 101 and 102 arranged in the front-rear direction D1, the front space 112 and the space 203A of the suction recess 203 behind the front space 112 from the positions distributed in the front-rear direction D1 in the injection filling step. Can be continuously sucked.
  • Three or more suction ports can be formed on the peripheral wall 111 according to the axial length of the sleeve 11, the degree of vacuum required inside the sleeve 11, and the like.
  • a third suction port and a fourth suction port can be added in front of the second suction port 102.
  • These suction ports can be arranged in the front-rear direction D1 at an equal pitch or a variable pitch.
  • the first suction port 101 and the second suction port 102 are through holes having a circular cross section having the same diameter. However, the first suction port 101 and the second suction port 102 do not necessarily have the same diameter, and the shape of their openings does not matter.
  • One or both of the first suction port 101 and the second suction port 102 may be formed in an oval shape long in the front-rear direction D1 or a long oval shape in the circumferential direction of the sleeve 11.
  • the plunger 20 includes a tip 21 that pushes the molten metal in the sleeve 11 forward, and a rod 22 that supports the tip 21 from the rear.
  • the rod 22 is connected to a piston rod of a hydraulic cylinder (not shown) via a coupling (not shown). Due to the driving force of the hydraulic cylinder, the plunger 20 advances from the predetermined origin position toward the cavity 7 with a predetermined injection stroke to inject the molten metal, and when the injection is completed, the plunger 20 retracts to the origin position.
  • the plunger 20 is located between the tip body 201 including at least the front end 20F of the tip 21, the tip rear portion 202 located on the rod 22 side, and the tip body 201 and the tip rear portion 202, and is a sleeve 11. It includes a suction recess 203 that forms a space 203A for preventing the inflow of outside air inside the peripheral wall 111, and a rear suction path 204 (# 4) that communicates with the suction recess 203 from behind the chip rear portion 202.
  • the inside of the chip 21 is typically provided with a cooling mechanism (not shown) for circulating a cooling medium such as water. With such a cooling mechanism, thermal expansion of the chip 21 can be suppressed.
  • the chip body 201 is a columnar member arranged inside the inner peripheral portion of the peripheral wall 111.
  • the chip rear portion 202 is a columnar member arranged behind the chip main body 201 and inside the inner peripheral portion of the peripheral wall 111.
  • the tip rear portion 202 is attached to the rod 22 via the joint 23.
  • the same or different clearances are set between the chip main body 201 and the inner peripheral portion of the peripheral wall 111, and between the chip rear portion 202 and the inner peripheral portion of the peripheral wall 111, respectively.
  • the suction recess 203 is retracted inward in the radial direction of the chip body 201 with respect to the inner peripheral portion of the peripheral wall 111.
  • the suction recess 203 covers the entire circumference by the rear end 201B of the chip main body 201, the front end 202A of the chip rear portion 202, and the outer peripheral portion of the small diameter portion 203D whose diameter is smaller than the respective diameters of the chip main body 201 and the chip rear portion 202. It is partitioned.
  • the molten metal M in the front space 112 basically does not enter the inside of the suction recess 203 beyond the gap between the tip main body 201 and the sleeve 11.
  • the suction recess 203 provides a space 203A depressurized rearward of the chip body 201 by vacuum suction through at least one of the first and second suction ports 101 and 102 of the sleeve 11 and the rear suction path 204.
  • the decompressed space 203A behind the front space 112 the outside air flows into the front space 112, which has a negative pressure with respect to the outside atmosphere (outside air), through the gap between the tip 21 and the sleeve 11. You can prevent it from happening.
  • the pressure of the front space 112 is applied to the pressure of the cavity 7. Since it can be kept low, it is possible to prevent preceding molten metal. By preventing the hot water, it is possible to reduce product defects such as chipping, peeling, and stripping for shot blast.
  • a ring-shaped sealing member 205 may be provided on the chip rear portion 202, or the chip rear portion 202 may be provided. It is preferable that a sealant is filled between the outer peripheral portion of the wall and the inner peripheral portion of the peripheral wall 111.
  • the sealing member 205 and the sealing agent can also be provided on the outer peripheral portion of the chip main body 201.
  • the lubricant supplied to the chip 21 in the casting process also contributes to sealing between the outer peripheral portion of the chip 21 and the inner peripheral portion of the sleeve 11.
  • the rear suction path 204 extends rearward from the suction recess 203 via the tip rear portion 202 and is connected to the vacuum pipe of the vacuum suction system 30.
  • the rear suction path 204 is connected to, for example, a through hole 204A that penetrates the chip rear portion 202 in the axial direction at the upper portion of the chip rear portion 202 and communicates with the space 203A, and a space behind the chip rear portion 202 (the space behind the chip rear portion 202).
  • the rear space 113) includes a suction pipe 204B extending rearward along the rod 22.
  • the rear space 113 is an atmospheric pressure and corresponds to an outside air space.
  • the suction pipe 204B is connected to the vacuum pipe of the vacuum suction system 30 so as to allow a relative displacement in the front-rear direction D1 due to the advance / retreat of the plunger 20.
  • the rear suction path 204 is not open to the atmosphere regardless of the position of the plunger 20.
  • the suction ports 101 and 102 are open to the atmosphere depending on the position of the plunger 20.
  • the rear suction path 204 does not necessarily have to include the through hole 204A of the chip rear portion 202, and may be configured to include, for example, a groove formed at the upper end of the chip rear portion 202. Further, the joint 23 or the rod 22 may be formed with a through hole as a part of the rear suction path 204 instead of the suction pipe 204B. Further, there may be two or more rear suction paths 204 communicating with the space 203A (see, for example, FIG. 7A).
  • the chip 21 may be assembled from a plurality of members, or may be integrally formed by cutting a single member or the like.
  • the chip 21 can be assembled from a member corresponding to the chip main body 201, a member corresponding to the small diameter portion 203D, and a member corresponding to the chip rear portion 202.
  • the control device 40 (FIG. 1) controls the components of the die casting machine 1 including the injection device 10, the vacuum suction system 30, and the hot water pouring device (not shown) according to the manufacturing conditions, thereby molding, pouring, and injecting filling.
  • a series of procedures including steps such as pressure boosting / holding, cooling, mold opening, product removal, mold release agent supply to the mold, plunger retreat, and lubricant supply to the chip 21 under a predetermined cycle time. Repeat.
  • the control device 40 drives and controls a hydraulic cylinder (not shown) coupled to the plunger 20 while detecting the position of the plunger 20 by the position detecting unit 20S (FIG. 1) in the process of injection filling and the retracting of the plunger.
  • the plunger 20 is controlled to a predetermined moving speed.
  • the control device 40 controls the operation of the on-off valve 313 and the vacuum valve 30V of the vacuum suction system 30.
  • the position of the plunger 20 detected by the position detection unit 20S is used.
  • the position detection unit 20S for example, it is preferable to use a linear encoder provided on the piston rod of the hydraulic cylinder coupled to the rod 22 of the plunger 20.
  • the position of the plunger 20 can be detected by using a switch lever provided on the rod 22 and a plurality of limit switches operated by the switch lever.
  • FIGS. 4 (a) and 4 (b) show an example of the pattern of the forward speed of the plunger 20 in the injection filling step S10.
  • the casting pressure which is the pressure applied to the molten metal through the plunger 20 by a hydraulic cylinder (not shown)
  • a broken line the casting pressure
  • the low-speed injection step S11 for advancing the plunger 20 from the original position in the low-speed range and the advancing speed of the plunger 20 to the high-speed range in the middle of the injection stroke are increased, and the molten metal M is transferred from the sleeve 11 by the tip 21.
  • the high-speed injection step S12 of extruding and injecting into the cavity 7 is included.
  • the low-speed injection step S11 is started when the plunger 20 starts advancing, and for example, when the molten metal M reaches the gate 43 via the runner 42, the low-speed injection step S11 shifts to the high-speed injection step S12.
  • the high-speed injection step S12 is performed, for example, until the cavity 7 is filled with the molten metal M.
  • the moving speed of the plunger 20 in the low-speed injection step S11 may be constant as shown by the alternate long and short dash line in FIG. 4A, but the movement of the plunger 20 is temporarily shown by the solid line in FIG. 4A.
  • the plunger 20 may be stopped for the stop period t1 or the plunger 20 may be temporarily decelerated for the deceleration period t2 as shown in (b).
  • the first suction port is parallel to, or not necessarily parallel to, suction from the front space 112 using the first suction port 101 and the second suction port 102.
  • suction from the suction recess 203 through at least one of the 101 and the second suction port 102 and the rear suction path 204.
  • "before and after" of the stop or deceleration means that the suction recess 203 is continuously sucked from before the start of the stop or deceleration to after the end of the stop or deceleration.
  • the control device 40 After increasing the speed of the plunger 20 to the high speed range, the control device 40, for example, based on the signal of the position detection unit 20S that detects the arrival of the plunger 20 at the speed pressure switching position (VP (Velocity Pressure) switching position), the plunger 20.
  • the speed control based on the speed of 20 is switched to the pressure control (pressure holding control / pressure increasing control) based on the pressure of the molten metal in the cavity 7, and the process shifts to the pressure increasing / holding pressure step S20.
  • the movable platen 3 is moved to open the molds 2 and 4.
  • the product is pushed out from the cavity 7 by driving the product extrusion mechanism 2A, so that the product can be taken out from the molds 2 and 4.
  • the pressure is increased and the high pressure is propagated to every corner of the cavity 7 to compress and crush the air entrained in the molten metal.
  • the time required for the response of the valve of the hydraulic circuit including the hydraulic cylinder coupled to the plunger 20 and the hydraulic oil is expected, and the speed pressure switching position is the filling in which the molten metal has been filled in the cavity 7 in the injection stroke of the plunger 20. It is set to a position behind the completed position by the set length.
  • the vacuum suction system 30 is provided with a vacuum pump 31, a pressure gauge 32A, a vacuum tank 32 in which the inside is depressurized by the operation of the vacuum pump 31, a first suction port 101, a second suction port 102, and a rear suction path.
  • a sleeve suction system 30S that sucks the inside of the sleeve 11 through 204, a mold suction system 30M that directly sucks the cavity 7 through the suction portions 8 provided in the molds 2 and 4, and a pressurization for performing an air blow process. It is equipped with an air supply system 30P.
  • the sleeve suction system 30S and the mold suction system 30M also serve as the vacuum tank 32, but this is not the case, and the sleeve suction system 30S and the mold suction system 30M are separately used. It may be configured.
  • the mold suction system 30M includes a vacuum filter 301 for vacuum suction, a pressure gauge for detecting the pressure in the piping of the mold suction system 30M, and a compound meter in order from the upstream of the gas flow sucked from the cavity 7.
  • a pressure detecting unit 302 such as a pressure sensor and a vacuum valve 303 for communicating the suction unit 8 with the vacuum tank 32 are provided.
  • the vacuum filter 301 suppresses fine droplets of molten metal that can be mixed in the sucked gas, molten metal debris that is a solidified piece, a mold release agent, dust, and the like from entering the mold suction system 30M.
  • the vacuum filter 311 provided in the sleeve suction system 30S also suppresses molten metal residue, lubricant, dust and the like from entering the sleeve suction system 30S.
  • the vacuum valve 303 When the vacuum valve 303 is opened, the gas in the cavity 7 is sucked from the suction unit 8 into the mold suction system 30M based on the pressure difference between the inside of the vacuum tank 32 and the cavity 7. At the time of vacuum suction, it is preferable to monitor the pressure detected by the pressure detecting unit 302 to confirm that the vacuum suction is normally performed.
  • the sleeve suction system 30S includes a vacuum valve 30V and suction paths 310 (# 1, # 2, # 4) individually corresponding to the first suction port 101, the second suction port 102, and the rear suction path 204 of the sleeve 11. , A confluence / distribution unit 314 connected to these suction paths 310.
  • Each suction path 310 includes a vacuum filter 311 for vacuum suction, a pressure detection unit 312 such as a pressure sensor for detecting the pressure in the suction path 310, in order from the upstream of the flow of gas sucked from the sleeve 11.
  • An on-off valve 313 that opens or closes the suction path 310 is provided.
  • the vacuum valve 30V has a vacuum suction state in which each suction path 310 communicates with the vacuum tank 32, an air blow state in which each suction path 310 communicates with the pressure tank 322, and each suction path 310 in the vacuum tank 32 and the vacuum tank 32. It is possible to switch to a neutral state that does not communicate with any of the pressure tanks 322. When the vacuum valve 30V is in the vacuum suction state, vacuum suction is possible through the suction path 310 in the state where the open / close valve 313 is open.
  • the filling rate of the molten metal M in the front space 112, the pressure detected by the pressure detection unit 312, etc. can be adjusted according to the position of the plunger 20. Accordingly, all or part of the first suction port 101, the second suction port 102, and the rear suction path 204 can be communicated with the vacuum tank 32 to perform vacuum suction. From the viewpoint of reducing the pressure inside the sleeve 11 to a sufficiently high degree of vacuum in a short time, it is preferable to use more suction ports 101 and 102 to secure a larger total opening area and perform vacuum suction. ..
  • the opening / closing valve 313 of the suction path 310 (# 1) connected to the first suction port 101 When the opening / closing valve 313 of the suction path 310 (# 1) connected to the first suction port 101 is opened, the first suction port 101 and the vacuum tank 32 communicate with each other via the suction path 310. Then, based on the pressure difference between the inside of the vacuum tank 32 and the inside of the sleeve 11, the gas inside the sleeve 11 flows into the suction path 310 through the first suction port 101. The gas that has flowed into the suction path 310 through the first suction port 101 merges with the flow from the other suction path 310 at the merging / distributing section 314 via the vacuum filter 311, the pressure detecting section 312, and the opening / closing valve 313, and further, the vacuum valve.
  • the first suction port 101, the second suction port 102, the rear suction path 204, and each suction path 310 are also used as a path for performing air blow after the injection is completed.
  • the molten metal residue can be removed from the suction path 310, the suction ports 101 and 102, and the rear suction path 204 by air blowing.
  • the pressurized air supply system 30P that performs air blow processing includes a compressed air source 321 that is a supply source of pressurized air, and a pressurized tank 322 that stores pressure inside by sending air by the compressed air source 321. ing.
  • the connection destination of the merging / distributing section 314 is connected to the vacuum tank 32 by the vacuum valve 30V. And by switching to the pressure tank 322, vacuum suction and air blow can be continuously performed.
  • the pressurized air supply system 30P is also used for the air blow of the mold suction system 30M performed after the mold is opened. Therefore, the vacuum valve 303 can switch the connection destination of the suction path of the mold suction system 30M between the vacuum tank 32 and the pressure tank 322.
  • the flow rate of the air blow can be adjusted by a flow rate adjusting valve such as a ball valve (Globe Valve) provided between the vacuum valve 303 and the pressure tank 322 (not shown).
  • the mold suction system 30M may be connected to a pressurized tank and a compressed air source different from the pressurized tank 322 and the compressed air source 321.
  • the pressurized air is distributed from the pressurized tank 322 to each suction path 310 by the merging / distributing unit 314, and the first suction port 101, the second suction port 102, and the rear suction path are distributed. It spouts from 204 respectively.
  • the opening and closing of the opening / closing valve 313 corresponding to each of the first suction port 101, the second suction port 102, and the rear suction path 204 and performing air blow at one place the positive pressure of the pressurized air can be obtained.
  • the blocked state of each suction path 310 can be detected based on the measured value of the pressure detection unit 312.
  • the flow rate of the air blow can be increased to enhance the cleaning effect.
  • the flow rate of the air blow can be adjusted by a flow rate adjusting valve such as a spherical valve (Globe Valve) provided between the vacuum valve 30V and the pressure tank 322 (not shown).
  • a flow rate adjusting valve such as a spherical valve (Globe Valve) provided between the vacuum valve 30V and the pressure tank 322 (not shown).
  • each of the first suction port 101 and the second suction port 102 and the plunger 20 changes depending on the position of the plunger 20 with respect to the sleeve 11.
  • gas can be sucked from the front space 112 through the second suction port 102. ..
  • the pouring port 110 is open to the atmosphere, the pouring port 110 is closed by the tip main body 201 on the premise that suction is performed from the front space 112.
  • the front space 112 as a closed space is formed in front of the chip main body 201.
  • the space 203A can be sucked from the suction recess 203 (see FIG. 5A).
  • the pouring port 110 is closed by the tip rear portion 202, so that the suction recess 203 as a closed space is formed in front of the tip rear portion 202.
  • the suction port (second suction port 102 in the example shown in FIG. 3) farthest forward from the pouring port 110 is closed by the tip rear portion 202, so that the suction from the suction recess 203 is completed. If so, it has been confirmed from the test results by the inventor that the molten metal moves from the front space 112 to the cavity 7 due to the pressure difference.
  • the cause of the occurrence of the first hot water is the deterioration of the degree of vacuum due to the inflow of outside air into the front space 112.
  • the suction port is closed by the tip main body 201 before the suction port farthest forward from the pouring port 110 is closed by the tip rear portion 202, so that the suction from the front space 112 is completed. Even so, it has been confirmed from the test results that the hot water can be suppressed if the suction from the suction recess 203 is continued.
  • the second suction port 102 is the suction port farthest forward from the pouring port 110, and after the second suction port 102 is closed by the tip body 201, suction is performed from the front space 112. Is finished.
  • the suction from the suction recess 203 through the suction port of the sleeve 11 is completed.
  • the suction of the suction recess 203 through the rear suction path 204 can be performed even after the suction through the second suction port 102 is completed regardless of the position of the plunger 20.
  • the capacity of vacuum suction performed through each of the first suction port 101 and the second suction port 102 of the sleeve 11 varies with the change in the projected area to the front space 112 and the suction recess 203, which are the suction targets.
  • the second suction port 102 shown in FIG. 3 is substantially fully open with respect to the front space 112, and when the second suction port 102 is projected in the hole axis direction, the second suction port 102 opens into the front space 112 with the opening 102A. Since it is projected over the entire area, the projected area to the front space 112 is the maximum. At this time, the suction capacity from the front space 112 through the second suction port 102 is maximum.
  • the suction recess 203 For example, when the first suction port 101 is projected in the hole axis direction with respect to the space 203A in FIG. 3, the projected area of the first suction port 101 is the maximum, and the suction recess 203 through the first suction port 101 The suction capacity is maximum. As the projected area of the first suction port 101 decreases due to the advancement or retreat of the plunger 20, the suction capacity from the suction recess 203 through the first suction port 101 also decreases.
  • the rear suction path 204 is always in communication with the suction recess 203 regardless of the position of the plunger 20 in the front-rear direction D1, and the projected area of the rear suction path 204 with respect to the space 203A of the suction recess 203 in the hole axis direction is the plunger. It is constant regardless of the position of 20. Therefore, according to the rear suction path 204, a constant suction capacity can be obtained regardless of the position of the plunger 20.
  • FIGS. 5A and 5B the diameters and pitches of the first suction port 101 and the second suction port 102, and the length of each part 201 to 203 of the chip 21 in the front-rear direction D1 are shown in FIG. Even if it is different from the example, it is the same that the projected area of each suction port 101, 102 changes according to the position of the plunger 20, and the suction capacity changes accordingly.
  • FIG. 5A shows a state in which the projected area A1 and the suction capacity are maximum with respect to the projection of the suction recess 203 through the first suction port 101
  • FIG. 5B shows the projected area A1 and the suction capacity. It shows the minimum state.
  • the opening / closing valve 313 corresponding to the first suction port 101 is closed.
  • the graph of FIG. 6 shows the change in the projected area of the suction port of the sleeve 11 to the suction recess 203 with respect to the injection stroke (position in the front-rear direction D1) of the plunger 20.
  • three suction ports having the same diameter are arranged at equal pitches in the front-rear direction D1.
  • the vertical axis of the graph shows the area ratio when the maximum projected area of the suction port to the suction recess 203 is 100%.
  • the area ratio changes periodically from the upper limit of 100% to the lower limit of 20% in this example, depending on the position of the plunger 20. 20% is an example, and the lower limit of the area ratio changes depending on the diameter and pitch of the suction port, the length of each part 201 to 203 of the tip, and the like.
  • An opening area corresponding to a ratio of 20% or more may be set in the rear suction path 204.
  • the opening area of the rear suction path 204 corresponds to the projected area from the rear to the suction recess 203. That is, assuming that the projected area of the rear suction path 204 to the suction recess 203 is A 2 , A 2 is set to be equal to or larger than the lower limit of the projected area A 1 of the suction port that periodically changes with respect to the position of the plunger 20. It is preferable to be done.
  • the opening area required for the rear suction path 204 can be set in consideration of the projected area of the suction port of the sleeve 11 on the suction recess 203, the pressure loss in the rear suction path 204, and the like.
  • the suction of the suction recess 203 through the rear suction path 204 can be performed regardless of the position of the plunger 20 even before the suction through the second suction port 102 of the sleeve 11 is completed, the suction is performed through the suction port of the sleeve 11.
  • the suction from the suction recess 203 through the rear suction path 204 can be continuously performed. By doing so, it is possible to strengthen the suppression of the inflow of outside air before the end of suction through the second suction port 102.
  • the control device 40 drives a hydraulic cylinder (not shown) to control the plunger 20 to a predetermined speed, and opens / closes each opening / closing valve 313 of the vacuum suction system 30 based on the position of the plunger 20 detected by the position detection unit 20S. do.
  • the plunger 20 shown in FIG. 7A is stopped at the in-situ position X0 .
  • the in-situ position X 0 is set, for example, at the position of the rear end 110B of the pouring port 110.
  • the pouring port 110 is closed by the tip rear portion 202.
  • both the suction recess 203 and the front space 112 are partitioned as a closed space, so that vacuum suction is started from each of the suction recess 203 and the front space 112. can do.
  • suction can be started through the rear suction path 204. Further, if even a part of the suction recess 203 is connected to the first suction port 101, it is possible to start suction through the first suction port 101.
  • two rear suction paths 204 are installed in the rear portion 202 of the chip. These rear suction paths 204 are connected to the same suction path 310 (# 4) of the vacuum suction system 30 (FIG. 2).
  • the suction (s02) through the second suction port 102 is started after the start of the suction (s01) through the suction recess 203 (recessed suction step s01 and front space suction step s02). ).
  • the suction of the suction recess 203 can be performed through at least one of the first suction port 101 and the rear suction path 204.
  • the control device 40 issues a control command for opening the on-off valve 313 corresponding to at least one of the first suction port 101 and the rear suction path 204, or at the same time, or after the control command is issued, the second A control command is issued to open the open / close valve 313 corresponding to the suction port 102.
  • the position of the plunger 20 where the front end 202A of the tip rear portion 202 exceeds the front end 110A of the pouring port 110 and reaches the rear end 101B of the first suction port 101 is set to the vacuum start position X1.
  • the points of interest are shown by enclosing them in a broken line circle.
  • Suction from the suction recess 203 through the first suction port 101 or the second suction port 102 is indicated by a solid line arrow
  • suction from the suction recess 203 through the rear suction path 204 is indicated by a broken line arrow
  • the second suction port 102 is indicated by a broken line arrow
  • the suction from the anterior space 112 through is indicated by the arrow of the two-point chain line. Further, the state in which the outside air tries to flow forward from the rear space 113 through the gap between the tip 21 and the sleeve 11 is indicated by the arrow of the alternate long and short dash line. The same applies to FIGS. 8 and 9 thereafter.
  • the outside air that has flowed forward through the gap between the tip 21 and the sleeve 11 is sucked into the suction path 310 through the suction ports 101 and 102 or the rear suction path 204.
  • suction can be performed from the suction recess 203 and the front space 112 with the maximum suction efficiency through the first suction port 101 and the second suction port 102.
  • suction from the suction recess 203 through the rear suction path 204 is also performed, so that the suction efficiency is further improved.
  • the front space 112 can be efficiently and sufficiently depressurized while preventing the inflow of outside air.
  • the degree of vacuum in the front space 112 can be further sufficiently increased by temporarily stopping or decelerating the advancement of the plunger 20.
  • the hot water is prevented by keeping the degree of vacuum of the front space 112 higher than the degree of vacuum of the cavity 7 and preventing outside air from flowing into the front space 112 due to the suction of the suction recess 203.
  • Direct vacuum suction from the cavity 7 is possible after the pouring port 110 is closed by the chip body 21 by the mold suction system 30M, but in order to prevent pre-hot water, after the start of suction of the front space 112. It is good to do it at an appropriate timing.
  • the chip body 201 and the sleeve 11 are used until the opening / closing valve 313 corresponding to the first suction port 101 is actually closed after the closing command is generated.
  • the suction by the first suction port 101 through the gap between the tip rear portion 202 and the sleeve 11 can be continued.
  • the thin solid line shown in FIG. 7 (c) indicates that the suction is about to end due to the closing command to the opening / closing valve 313 corresponding to the first suction port 101.
  • the first suction port 101 communicates with the rear space 113 and the atmosphere. Will be released to.
  • the opening / closing valve 313 corresponding to the first suction port 101 is already closed, and the suction through the first suction port 101 is stopped. Therefore, the outside air does not flow into the suction path 310 from the first suction port 101.
  • the plunger 20 advances to a position where the front end 202A of the tip rear portion 202 reaches the front end of the second suction port 102, the tip rear portion covers the entire projection range of the second suction port 102. Since 202 is present, the suction efficiency is lowered by closing the second suction port 102.
  • the control device 40 issues a command to close the opening / closing valve 313 corresponding to the second suction port 102. After the closing command is issued, suction by the second suction port 102 can be continued until the opening / closing valve 313 corresponding to the second suction port 102 is actually closed.
  • Suction through the second suction port 102 is indicated by a thin solid arrow as it is scheduled to end.
  • the displacement amount of the plunger 20 from FIG. 7 (c) to FIG. 8 (b) is the sum of the dimension L1 between the first suction port 101 and the second suction port 102 and the diameter L2 of one suction port. Corresponds to the length.
  • the procedure corresponding to FIGS. 7 (c) and 8 (a) is performed the number of times according to the number of suction ports. Repeated.
  • suction through the rear suction path 204 is started at least before the suction of the second suction port 102, which is the farthest from the pouring port 110, is stopped.
  • the suction start through the rear suction path 204 may be started when the second suction port 102 shown in FIG. 8B is closed.
  • the suction of the suction recess 203 is started from the vacuum start position shown in FIG. 7B through the rear suction path 204, and the suction of the suction recess 203 is started before and after the suction stop of the second suction port 102.
  • the control device 40 moves the plunger 20 from the in-situ position X 0 at a low speed, then switches the forward speed to a high speed, pushes the molten metal M out of the sleeve 11 by the tip 21, and ejects the molten metal M into the cavity 7 via the mold sleeve 41. (FIG. 9 (a)).
  • the control device 40 changes the pressure based on the pressure of the molten metal in the cavity 7 from the speed control based on the speed of the plunger 20 based on the signal of the position detection unit 20S that detects the arrival of the chip body 201 at the speed pressure switching position XVP . Switch control to control.
  • the process shifts from the injection filling step S10 to the pressure increasing / holding step S20.
  • Suction from the suction recess 203 through the rear suction path 204 is performed by keeping the opening / closing valve 313 corresponding to the rear suction path 204 open, so that at least the speed pressure switching position XVP is set as shown in FIG. 9B. It is continued until the chip main body 201 reaches (recessed suction continuation step s04).
  • the tip 21 exceeds the velocity / pressure switching position XVP and fills the cavity 7 while pushing the molten metal.
  • FIGS. 4A or 4B while the plunger 20 is advancing in the high-speed injection step S12, a casting pressure balanced with the flow resistance at the gate 43 is generated, but the molten metal over the entire cavity 7 is generated. With the completion of filling, the plunger 20 is stopped, the casting pressure is rapidly increased, and the process shifts to the pressure increasing / holding step S20. In the pressure increasing / holding step S20, after the casting pressure is further increased, the molten metal is solidified while maintaining the predetermined value.
  • the tip 21 finally stops at a position advanced by the amount of shrinkage caused by the solidification of the molten metal.
  • the control device 40 issues a control command to close the opening / closing valve 313 corresponding to the rear suction path 204.
  • the on-off valve 313 is closed, suction through the rear suction path 204 is stopped.
  • a signal indicating the arrival of the plunger 20 at the speed pressure switching position X VP close to the position of the plunger 20 at the completion of filling is used for stopping the suction from the suction recess 203. ..
  • suction is continued through the suction recess 203 at least until the plunger 20 reaches the speed pressure switching position XVP , so that the movement of the molten metal to the cavity 7 due to the inflow of outside air is suppressed and the hot water is first hot. It is possible to suppress the deterioration of casting quality due to.
  • the suction from the suction recess 203 is continued until the filling is completed or just before the filling is completed beyond the velocity pressure switching position XVP , the leading hot water is no longer at risk until the filling is completed. Is more preferable because it can be prevented more reliably.
  • the control device 40 sucks through the rear suction path 204 when the completion of filling is detected, for example, based on the casting pressure after the plunger 20 reaches the speed pressure switching position XVP . It is preferable to stop the suction from the recess 203.
  • the casting pressure (FIGS. 4A and 4B) is calculated from the pressure on the rod side and the pressure on the head side of the hydraulic cylinder coupled to the rod 22 of the plunger 20, and is monitored by the control device 40. Therefore, the control device 40 can detect the completion of filling, for example, by applying a threshold value to the magnitude or increase rate of the casting pressure. Alternatively, the completion of filling can be detected by the arrival of the plunger 20 at the filling completion position X FC (FIG. 9B) detected by the position detecting unit 20S. If the completion of filling is detected based on the casting pressure or the position of the plunger 20, the control device 40 sends a closing command to the opening / closing valve 313 corresponding to the rear suction path 204.
  • the threshold value applied to the casting pressure is adjusted to a lower side, or instead of the filling completion position X FC , only the set length is set from the filling completion position X FC . It is also preferable to detect the completion of filling by the arrival of the plunger 20 at the position X FC ′ immediately before the completion of filling, which is located in front (rear).
  • the control device 40 switches the vacuum valve 30V (FIG. 2) to air blow with all the on-off valves 313 closed. Then, by sequentially opening the opening / closing valves 313 corresponding to the first suction port 101 and the second suction port 102, pressurized air is ejected from each of the first suction port 101 and the second suction port 102, and the suction path 310 The molten metal residue can be removed from the suction ports 101 and 102. The molten metal residue that has fallen into the sleeve 11 is discharged to the rear end of the sleeve 11 by the tip 21 as the plunger 20 retracts.
  • Cleaning of the rear suction path 204 and the suction recess 203 by air blow can be performed, for example, in a state where the plunger 20 is returned to the in-situ position X 0 as shown in FIG. 9 (c). At this time, the suction recess 203 is exposed behind the sleeve 11. Therefore, the molten metal residue removed from the suction recess 203 by the pressurized air ejected forward from the rear suction path 204 falls on the outside of the sleeve 11, so that the molten metal residue can be prevented from entering the inside of the sleeve 11.
  • the opening / closing valve 313 is opened / closed based on the position of the plunger 20, but instead of the position of the plunger 20, at the reference time, for example, at the start of movement of the plunger 20 from the original position. It is also possible to open / close the open / close valve 313 based on the time elapsed from (at the start of injection).
  • the sleeve 11 of the injection device 10-2 according to the modified example of the present invention shown in FIG. 10 is formed with only one suction port 101. Except for this point, the injection device 10-2 and the die casting machine 1-2 provided with the injection device 10-2 are configured in the same manner as in the above embodiment.
  • the tip 21 of the plunger 20 includes a suction recess 203 and a rear suction path 204. While the opening / closing valve 313 corresponding to the rear suction path 204 is open, suction from the suction recess 203 through the rear suction path 204 is possible continuously. Therefore, similarly to the control example described with reference to FIGS.
  • the plunger 20 may be provided with two or more suction recesses 203 at intervals in the front-rear direction D1.
  • the suction recess 203 and the chip rear portion 202 are arranged in multiple stages behind the chip main body 201.
  • the first chip rear portion 202-1, the first suction recess 203-1, the second chip rear portion 202-2, and the second suction recess 203-2 are arranged in this order from the rear end to the front end of the chip 21. ..
  • suction is performed from the first suction recess 203-1 through the first rear suction path 204-1 communicating with the first suction recess 203-1 from behind the rear portion 202-1 of the first chip, and the second suction recess is performed.
  • Suction from the second suction recess 203-2 is performed through the second rear suction path 204-2 communicating with the second suction recess 203-2 from behind the tip rear portion 202-2. It is not always necessary to perform suction from all of the plurality of suction recesses 203, and it is sufficient if suction is performed from at least a part of the suction recesses 203.
  • the rear suction paths 204 provided to the plurality of suction recesses 203 may be independent of each other or may be common in a part of the paths. In any case, by providing the plurality of suction recesses 203, even if a part of the suction recesses 203 is blocked by the adhesion of the molten metal residue, the suction from the other suction recesses 203 can be performed. Therefore, it is possible to prevent the inflow of outside air into the front space 112.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne : un dispositif d'injection pour une machine de moulage sous pression capable d'inhiber un mouvement erratique d'un métal fondu et d'un métal fondu précédent en empêchant l'entrée d'air extérieur dans un manchon sous aspiration ; et un procédé de moulage.　Le dispositif d'injection (10) comprend un manchon (11) et un piston (20). Le piston (20) comprend un élément terminal (21) et une tige (22). Le manchon (11) comprend au moins deux orifices d'aspiration (101), (102) qui sont disposés côte à côte dans une direction avant-arrière (D1) et passent à travers l'intérieur et l'extérieur du manchon (11). Le piston (20) comprend un corps principal (201) d'élément terminal comprenant au moins l'extrémité avant de l'élément terminal (21), un évidement d'aspiration (203) qui est situé derrière le corps principal (201) d'élément terminal et est rétracté vers l'intérieur de la partie circonférentielle interne du manchon (11) dans le sens radial, une partie arrière (202) d'élément terminal qui fait saillie vers l'extérieur de l'évidement d'aspiration (203) dans le sens radial et délimite l'évidement d'aspiration (203) vis-à-vis du côté arrière, et un circuit d'aspiration arrière (204) communiquant avec l'évidement d'aspiration (203) à partir de l'arrière de la partie arrière (203) d'élément terminal.
PCT/JP2021/020606 2020-09-29 2021-05-31 Dispositif d'injection pour machine de moulage sous pression et procédé de moulage WO2022070507A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024149839A1 (fr) * 2023-01-12 2024-07-18 Ninkel Thomas Procédé et dispositif de coulée sous vide

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002224807A (ja) * 2001-01-31 2002-08-13 Toyota Motor Corp 真空ダイカスト装置及び真空ダイカスト方法
JP2011079029A (ja) * 2009-10-08 2011-04-21 Toyota Motor Corp 真空ダイカスト方法
JP2014117741A (ja) * 2012-12-19 2014-06-30 Mazda Motor Corp 鋳造装置および鋳造方法
WO2018110024A1 (fr) * 2016-12-13 2018-06-21 宇部興産機械株式会社 Dispositif d'injection pour dispositif de moulage et procédé de moulage
WO2019225272A1 (fr) * 2018-05-22 2019-11-28 宇部興産機械株式会社 Dispositif d'injection pour machine de coulée sous pression, machine de coulée sous pression, structure de tuyau sous vide pour machine de coulée sous pression et procédé de coulée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002224807A (ja) * 2001-01-31 2002-08-13 Toyota Motor Corp 真空ダイカスト装置及び真空ダイカスト方法
JP2011079029A (ja) * 2009-10-08 2011-04-21 Toyota Motor Corp 真空ダイカスト方法
JP2014117741A (ja) * 2012-12-19 2014-06-30 Mazda Motor Corp 鋳造装置および鋳造方法
WO2018110024A1 (fr) * 2016-12-13 2018-06-21 宇部興産機械株式会社 Dispositif d'injection pour dispositif de moulage et procédé de moulage
WO2019225272A1 (fr) * 2018-05-22 2019-11-28 宇部興産機械株式会社 Dispositif d'injection pour machine de coulée sous pression, machine de coulée sous pression, structure de tuyau sous vide pour machine de coulée sous pression et procédé de coulée

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024149839A1 (fr) * 2023-01-12 2024-07-18 Ninkel Thomas Procédé et dispositif de coulée sous vide

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