CN111940699A - Feeding device and die casting machine - Google Patents
Feeding device and die casting machine Download PDFInfo
- Publication number
- CN111940699A CN111940699A CN202010697486.4A CN202010697486A CN111940699A CN 111940699 A CN111940699 A CN 111940699A CN 202010697486 A CN202010697486 A CN 202010697486A CN 111940699 A CN111940699 A CN 111940699A
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- check valve
- semi
- cavity
- solid slurry
- metering
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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
- B22D17/20—Accessories: Details
- B22D17/30—Accessories for supplying molten metal, e.g. in rations
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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
- B22D17/007—Semi-solid pressure die casting
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a feeding device and a die casting machine.A check valve is arranged on a charging barrel, a cavity of the charging barrel is divided into a conveying area and a metering area by the check valve, and semi-solid slurry is accurately metered by the metering area, so that the quantity of the semi-solid slurry entering an injection device every time is ensured to be constant, and the quality of die casting products is improved.
Description
Technical Field
The invention relates to the field of machining, in particular to a feeding device and a die-casting machine.
Background
In the semi-solid metal forming process, semi-solid slurry needs to be injected into a die, and the consistency of die-cast products can be ensured only if the amount of the semi-solid slurry injected into the die is the same each time. In the related art, the quantity of the injection device fed each time cannot be ensured to be the same due to the influence of the feeding device, and the quality of the product cannot be ensured.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a feeding device for metering semi-solid slurry, which divides a cavity of a charging barrel into a conveying area and a metering area through a check valve, so that the semi-solid slurry is metered, the constant amount of the semi-solid slurry entering an injection device every time is ensured, and the quality of die-casting products is improved.
A feeding device according to an embodiment of the first aspect of the present invention for metering semi-solid slurry comprises,
the charging barrel is provided with a cavity, a first feeding hole and a first discharging hole, and the first feeding hole and the first discharging hole are respectively communicated with the cavity;
a screw disposed in the cavity;
the first power part can drive the screw rod to rotate in the cavity;
the second power part can drive the screw to move in the cavity;
the check valve is connected with the screw rod and can divide the cavity into a conveying area and a metering area, the conveying area is communicated with the first feeding hole, the metering area is communicated with the first discharging hole, the check valve is in an opening state for communicating the conveying area with the metering area, and a closing state for cutting off communication between the conveying area and the metering area is provided.
The feeding device provided by the invention at least has the following technical effects: the cavity of the charging barrel is divided into a conveying area and a metering area through the check valve, the semi-solid slurry is accurately metered through the metering area, the quantity of the semi-solid slurry entering the injection device every time is ensured to be constant, and therefore the quality of die-cast products is improved.
According to some embodiments of the invention, the second power member comprises a cylinder and a piston rod, the screw is fixedly connected with the piston rod, and the check valve can be driven to be in the open state by the semi-solid slurry conveyed by the screw.
According to some embodiments of the invention, the piston rod moves to an end of the cylinder under the action of the semi-solid slurry in the metering zone.
According to some embodiments of the invention, the check valve is in the closed state during movement of the second motive element driving the check valve along the delivery zone to the metering zone.
According to some embodiments of the invention, the non-return valve comprises a nozzle, a transition ring and a medium, the transition ring is disposed between the nozzle and the medium, the transition ring is separated from the medium, the non-return valve is in an open state, the transition ring is in contact with the medium, and the non-return valve is in a closed state.
According to some embodiments of the invention, the nozzle comprises a nozzle head and a fixing rod, the nozzle head is fixedly connected with the first end of the screw rod through the fixing rod, the transition ring is sleeved on the fixing rod, a gap is formed between the transition ring and the fixing rod, and the nozzle head is provided with a nozzle hole communicated with the gap.
According to some embodiments of the invention, further comprising a first heating device disposed at an outer periphery of the cartridge.
The die casting machine according to the second aspect of the present invention includes the feeding device in the above embodiment.
According to some embodiments of the invention, the injection device is provided with an injection chamber, a second feed inlet and a second feed inlet, the second feed inlet and the second discharge outlet are respectively communicated with the injection chamber, and the cavity is communicated with the injection chamber through the first discharge outlet and the second feed inlet; and the switch valve is used for controlling the connection and disconnection between the charging barrel and the injection chamber.
According to some embodiments of the invention, the on-off valve is disposed at the first discharge port.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of a first state of a die casting machine according to the present invention;
FIG. 2 is an enlarged view taken at point I in FIG. 1;
FIG. 3 is a schematic view of the check valve of FIG. 1;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic structural view of a second state of the die casting machine of the present invention;
FIG. 6 is an enlarged view taken at point II of FIG. 5;
reference numerals:
the feeding device 100, the charging barrel 110, the first feeding hole 111, the first discharging hole 112, the cavity 113, the screw 120, the first end 121, the second end 122, the second heating device 130, the second power member 140, the cylinder 141, the piston rod 142, the first power member 150, the first heating device 160, the check valve 170, the nozzle 171, the nozzle head 1711, the fixing rod 1712, the limit boss 17121, the nozzle hole 1713, the transition ring 172, and the meson 173;
the shot device 200, the shot punch 210, the shot sleeve 220, the shot chamber 230, the second feed opening 231, the second discharge opening 232;
a mold 300;
an on-off valve 400;
semi-solid slurry a.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
As shown in fig. 1 and 2, the feeding device 100 includes a barrel 110, a screw 120, a first power member 150, a second power member 140, and a check valve 170. The charging barrel 110 is provided with a cavity 113, a first feeding hole 111 and a first discharging hole 112, the first feeding hole 111 and the first discharging hole 112 are respectively communicated with the cavity 113, the screw 120 is arranged in the cavity 113, the first power part 150 can drive the screw 120 to rotate in the cavity 113, the second power part 140 can drive the screw 120 to move in the cavity 113, the check valve 170 is connected with the screw 120, specifically, the check valve 170 is fixedly connected with the first end 121 of the screw 120, the cavity 113 is divided into a conveying area and a metering area by the check valve 170, the conveying area is communicated with the first feeding hole 111, the metering area is communicated with the first discharging hole 112, and the check valve 170 has an opening state for communicating the conveying area with the metering area and a closing state for cutting off the conveying area and the metering area.
The second power member 140 drives the screw 120 to move from right to left in the cavity 113, the check valve 170 is always in a closed state, when the check valve 170 moves to the leftmost end of the barrel 110, the second power member 140 stops driving the screw 120 to move, the on-off valve 400 is closed, at this time, the first power member 150 rotates to convey the semi-solid slurry a, the check valve 170 is opened under the action of the semi-solid slurry a on the right side of the barrel 110, the semi-solid slurry a enters the left side of the check valve 170 from the right side of the check valve 170, the semi-solid slurry a on the left side of the check valve 170 is continuously increased to generate a driving force, the check valve 170 and the screw 120 are pushed to move from left to right to a set position, at this time, the right side of the check valve 170 is a conveying area, the left side of the check valve 170 is a metering. The volume of the metering zone is determined by the position of the non-return valve 170 in the barrel 110, and the position of the non-return valve 170 may be set according to the demand for the dosage of the semi-solid slurry a.
After metering is completed, the on-off valve 400 is opened, the second power member 140 drives the screw 120 to move from right to left in the cavity 113, the check valve 170 is in a closed state, the semi-solid slurry a cannot enter the metering region from the delivery region, and the second power member 140 delivers the semi-solid slurry a in the metering region into the injection device 200. During the transfer of the semi-solid slurry a, the check valve 170 is always in the closed state, and the amount of the semi-solid slurry a transferred to the injection device 200 can be ensured to be always fixed, thereby improving the die casting quality of the product.
The first power member 150 may be a conventional actuator such as a hydraulic motor or an electric motor. The structure of the screw 120 is a feeding screw structure commonly used in the art and will not be described herein.
In some embodiments of the present invention, as shown in fig. 1 to 2 and 5 to 6, the second power member 140 is a piston cylinder, the piston cylinder includes a cylinder body 141 and a piston rod 142, two ends of the piston rod 142 extend out of the cylinder body 141, one end of the piston rod 142 is fixedly connected to the second end 122 of the screw rod 120, the first power member 150 can drive the piston rod 142 to rotate, an output end of the first power member 150 and the piston rod 142 can slide relatively, and the piston rod 142 and an output shaft of the first power member 150 can be connected by a spline. As shown in fig. 1 to 2, the check valve 170 is located at the leftmost end of the barrel 110, the check valve 170 is in a closed state, the semi-solid slurry a is gathered toward the first discharge port 112 by the screw 120, the check valve 170 is opened by the semi-solid slurry a, the semi-solid slurry a flows into the left side of the check valve 170 through the check valve 170, the semi-solid slurry a at the left side of the check valve 170 is continuously increased to generate a driving force to drive the check valve 170, the screw 120 and the piston rod 142 to move from left to right until the piston rod 142 moves to the rightmost end of the cylinder 141, at this time, metering of the semi-solid slurry a required for one time die casting is completed, and then the second power member 140 drives the screw 120 to move leftward along the barrel 110, so that the semi-solid slurry a in the metering region is fed into the injection device 200. The size of the metering area is matched with the stroke of the piston cylinder, when more semisolid slurry A is needed, the piston cylinder with the larger stroke is selected, and when the needed semisolid slurry A is smaller, the piston cylinder with the smaller stroke is selected. The metering is completed by using the piston cylinder, the metering mode is simple, the metering is accurate, the piston cylinder can also provide power for conveying the semi-solid slurry A which is metered to the injection device, and the conveying efficiency is high.
In some embodiments of the present invention, as shown in fig. 3 to 4, the non-return valve 170 includes a nozzle 171, a transition ring 172, and a medium 173, the transition ring 172 being disposed between the nozzle 171 and the medium 173. As shown in fig. 2, when the transition ring 172 is separated from the medium 173, the non-return valve 170 is in an open state, and the semi-solid slurry a passes through a gap between the transition ring 172 and the medium 173, thereby entering the metering zone; as shown in fig. 6, when the transition ring 172 contacts the medium 173, the check valve 170 is in a closed state, the semi-solid slurry a cannot enter the metering region from the delivery region, and when the semi-solid slurry a in the metering region is delivered into the injection device 200 by the second power member 140, the check valve 170 is always in a closed state, so that the metering accuracy is ensured.
In some embodiments of the present invention, with reference to fig. 2 to 4 and 6, the nozzle 171 includes a nozzle head 1711 and a fixing rod 1712, the nozzle head 1711 has a conical structure, the nozzle head 1711 is provided with a plurality of nozzle holes 1713, and the nozzle holes 1713 are uniformly distributed along an axis of the nozzle head 1711. The nozzle head 1711 is fixedly connected to the first end 121 of the screw rod 120 through a fixing rod 1712, for example, the first end 121 of the screw rod 120 is provided with an insertion hole, the fixing rod 1712 is inserted into the insertion hole, the fixing rod 1712 and the insertion hole may be fixedly connected by interference fit, and the fixing rod 1712 and the insertion hole may be fixedly connected by threaded connection.
In some embodiments of the present invention, the feeding device 100 further includes a first heating device 160, the first heating device 160 is a heating element capable of precisely controlling the temperature, the first heating device 160 is disposed at the outer periphery of the barrel 110 for heating the barrel 110, and the semi-solid slurry a can be continuously maintained at a constant temperature in the barrel 110 by the arrangement of the first heating device 160, so as to prevent the semi-solid slurry a from being solidified.
The number of the first heating means 160 may be plural, a plurality of the first heating means are distributed along the length direction of the cartridge 110, and each of the first heating means 160 can be independently operated. The feeding device 100 can be used for melting metal particles, the metal particles need to undergo heating, melting and heat preservation stages in the process of melting the metal particles into the semi-solid slurry A, the temperature requirements of the stages are different, and the metal particles can be at the temperature required by the melting stages in the conveying process by adjusting the temperature of the first heating device 160 at different positions on the charging barrel 110, so that the high-quality semi-solid slurry A is obtained. The metal particles become the semi-solid slurry a by the stirring and shearing action of the screw 120 and the heating action of the first heating means 160. The feeding and melting of the metal are carried out in a closed environment, the entrainment of gas in the semi-solid slurry A is reduced, and the quality of die-casting products can be improved in the die-casting process.
The metal particles can be zinc alloy, aluminum alloy, magnesium aluminum alloy, copper alloy, etc., the melting points of different metals are different, and when different metal particles are processed, the temperature of the first heating device 160 can be correspondingly adjusted, so that the needed semi-solid slurry A is obtained.
In the die casting machine according to the second embodiment of the present invention, the feeding device 100 according to the above embodiment is included.
The die casting machine in this embodiment can reduce the involvement of gas in the semi-solid slurry through the metering of the semi-solid slurry in the feeding device 100, can reduce the gas holes in the product, and can ensure that the amount of the semi-solid slurry input into the die at each time is fixed, thereby effectively improving the quality of the product.
In some embodiments of the present invention, a shot device 200 is also included, the shot device 200 having a shot chamber 230, a second feed opening 231, a second discharge opening 232, a shot sleeve 220 and a shot punch 210, wherein the second feed opening 231 and the second discharge opening 232 are respectively in communication with the shot chamber 230, the cavity 113 is in communication with the shot chamber 230 through the first discharge opening 112 and the second feed opening 231, and the on-off valve 400 is used for controlling the opening and closing between the cartridge 110 and the shot chamber 230. When the metering of the semi-solid slurry is completed, the on-off valve 400 is opened and the second power member 140 is moved from right to left to shot the semi-solid slurry a of the metering region into the shot chamber 230, whereupon the on-off valve 400 is closed and the shot sleeve 220 drives the shot punch 210 to move from right to left within the shot chamber 230 to shot the semi-solid slurry a within the shot chamber 230 into the die 300 where the semi-solid slurry is cooled for solidification molding in the die 300, the shot sleeve 220 being either a pneumatic cylinder or a hydraulic cylinder.
In some embodiments of the present invention, the on-off valve 400 is disposed at the first discharge port 112, the on-off valve 400 is reciprocally movable along the length direction of the cartridge 110 to close or open the first discharge port 112, and the reciprocal movement of the on-off valve 400 may be driven by air pressure, hydraulic pressure, or a motor. It is understood that other types of on-off valves 400 known in the art may be used to open and close the passage between the shot device 200 and the feed device 100.
In some embodiments of the invention, the outer periphery of the shot chamber 230 is provided with the second heating device 130, and the second heating device 130 provided at the outer periphery of the shot chamber 230 is the same as the first heating device 160 provided at the outer periphery of the cartridge 110, all being heating coils that allow for precise temperature control. By providing the second heating means 130 at the outer periphery of the shot chamber 230, the semi-solid slurry within the shot chamber 230 can be maintained in a molten state throughout, preventing the semi-solid slurry from solidifying within the shot chamber 230 due to low temperatures.
With reference to the foregoing embodiments, the die casting machine according to an embodiment of the present invention includes the following steps:
(1) the barrel 110 and shot chamber 230 are preheated;
(2) feeding metal particles into a conveyor 100;
(3) the metal particles are conveyed and melted in the conveying device 100, the check valve 170 is opened, the semi-solid slurry enters the left side of the check valve 170 from the right side of the check valve 170 through the check valve 170, and the semi-solid slurry on the left side of the check valve 170 generates a driving force to drive the check valve 170, the screw rod 120 and the piston rod 142 to the right until the piston rod 142 abuts against the cylinder wall of the cylinder 141, so that the metering of the semi-solid slurry is completed.
(4) The on-off valve 400 is opened and the barrel 110 is communicated with the shot chamber 230, the second power member 140 drives the screw 120 and the check valve 170 to move from right to left, the check valve 170 is closed, and the second power member 140 delivers the semi-solid slurry of the metering section into the shot chamber 230.
(5) The on-off valve 400 is closed and the shot sleeve 220 drives the shot punch 210 leftward along the shot chamber 230 to shot the semi-solid slurry within the shot chamber 230 into the die 300 where it is cooled, solidified and formed.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The feeding device is used for metering semi-solid slurry and is characterized by comprising,
the charging barrel is provided with a cavity, a first feeding hole and a first discharging hole, and the first feeding hole and the first discharging hole are respectively communicated with the cavity;
a screw disposed in the cavity;
the first power part can drive the screw rod to rotate in the cavity;
the second power part can drive the screw to move in the cavity;
the check valve is connected with the screw rod and can divide the cavity into a conveying area and a metering area, the conveying area is communicated with the first feeding hole, the metering area is communicated with the first discharging hole, the check valve is in an opening state for communicating the conveying area with the metering area, and a closing state for cutting off communication between the conveying area and the metering area is provided.
2. The feeding device according to claim 1,
the second power part comprises a cylinder body and a piston rod, the screw is fixedly connected with the piston rod, and the check valve can be driven by the semi-solid slurry conveyed by the screw to be in the open state.
3. The feeding device according to claim 2,
the piston rod moves to the end of the cylinder body under the action of the semi-solid slurry in the metering area.
4. The feeding device according to claim 1,
the check valve is in the closed state during the process that the second power member drives the check valve to move along the conveying area to the metering area.
5. The feeding device according to claim 1,
the check valve comprises a nozzle, a transition ring and a meson, the transition ring is arranged between the nozzle and the meson, the transition ring is separated from the meson, the check valve is in the open state, the transition ring is in contact with the meson, and the check valve is in the closed state.
6. The feeding device according to claim 5,
the nozzle comprises a nozzle head and a fixed rod, the nozzle head is fixedly connected with the first end of the screw rod through the fixed rod, the transition ring is sleeved on the fixed rod, a gap is formed between the transition ring and the fixed rod, and the nozzle head is provided with a nozzle hole communicated with the gap.
7. The feeding device as set forth in claim 1, further comprising,
a first heating device disposed at an outer periphery of the cartridge.
8. The die casting machine is characterized by comprising a die casting machine,
the feed device of any one of claims 1 to 7.
9. The die casting machine of claim 8, further comprising,
the injection device is provided with an injection chamber, a second feed inlet and a second discharge hole, the second feed inlet and the second discharge hole are respectively communicated with the injection chamber, and the cavity is communicated with the injection chamber through the first discharge hole and the second feed inlet;
and the switch valve is used for controlling the connection and disconnection between the charging barrel and the injection chamber.
10. The die casting machine of claim 9,
the switch valve is arranged at the first discharge port.
Priority Applications (1)
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CN202010697486.4A CN111940699A (en) | 2020-07-20 | 2020-07-20 | Feeding device and die casting machine |
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CN202010697486.4A CN111940699A (en) | 2020-07-20 | 2020-07-20 | Feeding device and die casting machine |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113385652A (en) * | 2021-06-15 | 2021-09-14 | 深圳领威科技有限公司 | Die casting control method |
JP6999256B1 (en) * | 2020-11-06 | 2022-01-18 | 燕山大学 | Equipment for continuously producing semi-solid slurry from metal powder |
CN118437901A (en) * | 2024-04-10 | 2024-08-06 | 宁波保税区海天智胜金属成型设备有限公司 | Cold chamber die-casting injection structure and die casting machine for semi-solid magnesium alloy |
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