CN217044517U - High vacuum die casting equipment of release is exempted from to holding furnace - Google Patents
High vacuum die casting equipment of release is exempted from to holding furnace Download PDFInfo
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- CN217044517U CN217044517U CN202123248222.XU CN202123248222U CN217044517U CN 217044517 U CN217044517 U CN 217044517U CN 202123248222 U CN202123248222 U CN 202123248222U CN 217044517 U CN217044517 U CN 217044517U
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Abstract
The utility model discloses a high vacuum die-casting equipment of release is exempted from to heat preservation stove, this high vacuum die-casting equipment of release is exempted from to heat preservation stove includes: the device comprises a die casting machine, an air pressure casting type holding furnace, a pressure chamber vacuumizing system, a cavity vacuumizing system, a die and a Z-shaped liquid lifting pipe; the die casting machine is provided with a machine base, and an installation space of the air pressure pouring type holding furnace is arranged below the machine base; a pressure chamber of the die casting machine is provided with a vacuumizing air flue and a riser tube mounting interface; the die casting machine is provided with an injection punch head in threaded connection with the injection piston rod; the injection piston rod is connected with the injection system; the vacuum pumping systems respectively connected with the pressure chamber and the cavity respectively comprise a vacuum pump, a vacuum tank body, a gate valve, a filter, a vacuum pressure sensor and a vacuum opening and closing valve to form 2 vacuum pumping loops; the utility model provides a high vacuum die-casting equipment of release is exempted from to heat preservation stove enables the cost reduction of vacuum die-casting, improves the reliability of mould cavity vacuum and reduces the vacuum system fault rate.
Description
Technical Field
The utility model relates to a vacuum die-casting technical field, in particular to high vacuum die-casting complete sets and casting method of release are exempted from to holding furnace.
Background
Die casting is an efficient and clean precision forming process, and the scale and technology are rapidly developed in recent decades. But die casting also has its inherent drawbacks: the casting contains gas inside. In order to thoroughly eliminate the gas in the pressure chamber and the die cavity, processes such as vacuum die casting and oxygen charging die casting are developed, wherein the vacuum die casting is successfully popularized and widely applied.
Vacuum die casting method has the advantages
1) The vacuum die casting method can eliminate or reduce air holes in the die casting, improve the mechanical property and the surface quality of the die casting and improve the plating performance;
2) the vacuum die-casting method greatly reduces the back pressure of the cavity, can use lower specific pressure and alloy with poorer casting performance, and can be used for die-casting larger castings by small machines;
3) the vacuum die-casting method improves the filling condition and can die-cast thinner castings;
4) compared with the common die casting method, the vacuum die casting method has almost the same production efficiency.
Innovative applications of the vacuum die casting apparatus have been known for a long time as described in cited patent 1 to cited patent 3.
Patent 1 is cited. Chinese patent: CN 106975738B, vacuum die casting equipment and a high vacuum die casting method disclose a vacuum die casting equipment, innovatively introduce a back-flushing gas applying device to realize back-flushing treatment of a pressure chamber and a cavity, so that metal chips, dust and the like remained in the pressure chamber and the cavity can be removed, and the problems of residue and blockage of vacuum pipelines leading to the pressure chamber and the cavity are prevented.
Patent 2 is cited. Chinese patent: CN 102145381B, a vacuum apparatus for high vacuum die-casting, utility model discloses a vacuum control device and control method thereof, how to take out the gas in the die cavity to predetermined vacuum degree promptly and ensure that the metal liquid in the die cavity does not get into vacuum apparatus when die-casting, prevents to block up the vacuum pipeline and has control accuracy height, set up and maintain simple and convenient, the fault rate is low, long service life's advantage.
Patent 3 is cited. European patent No.: EP1524048a1 discloses a control technique for high vacuum die casting, which is to arrange a movable piston at a certain position of a die cavity. When the molten metal is filled to the position, the pressure of the molten metal pushes the piston to move backwards, so that a sensor behind the piston sends out a signal to control the closing of the vacuum valve, and the vacuum of the pressure chamber and the cavity can be accurately realized.
The cited documents disclose various innovative technical solutions of the vacuum die casting device, but do not see innovative improvement of the pressure-free holding furnace in the vacuum die casting device, and the technical purpose is achieved by improving the structure of the lift tube.
The utility model provides a high vacuum die casting equipment design scheme of release is exempted from to heat preservation stove is realized through the structure of improving the stalk promptly to fill inert gas's method in the stalk. The utility model provides a design not only can realize preventing that the molten metal from getting into pressure room evacuation air flue purpose, can also realize that the holding furnace avoids the release function to waste in order to reduce the energy of die-casting in-process holding furnace circulation release pressure boost, reaches environmental protection, cost-effective purpose.
SUMMERY OF THE UTILITY MODEL
The utility model discloses when aiming at solving traditional die casting machine general problem, utility model relates to a high vacuum die-casting equipment and casting method of release are exempted from to holding furnace, its advantage is in reducible die-casting in-process holding furnace circulation release pressure boost's energy is extravagant, shortens the cycle of high vacuum die-casting effectively to make the foundry goods more high-efficiently, strengthen the reliability of high vacuum die-casting equipment's use.
The utility model adopts the technical proposal that: in the first aspect of the utility model, a high vacuum die casting equipment of release is exempted from to heat preservation stove is proposed, include: the device comprises a die casting machine, an air pressure casting type heat preservation furnace, a pressure chamber vacuumizing system, a cavity vacuumizing system, a die and a Z-shaped liquid lifting pipe; the die casting machine is provided with a higher machine base, and the air pressure casting type holding furnace can be installed and moved below the machine base; the die casting machine is provided with a pressure chamber, a vacuumizing air channel is arranged above the pressure chamber, and an installation interface of a liquid lifting pipe is arranged below the pressure chamber; the die casting machine is provided with an injection punch head, and the injection punch head is in threaded connection with the injection piston rod; the injection piston rod is connected with the injection system;
the air pressure pouring type heat preservation furnace is closed, is electrically connected with an air pressure control device and an air pressure sensor, and is provided with a liquid lifting pipe connected with the pressure chamber;
the cavity vacuum-pumping system and the pressure chamber vacuum-pumping system both comprise: the vacuum pump, the vacuum tank body, the gate valve, the filter, the vacuum pressure sensor and the vacuum valve for die casting; the vacuum pump is connected with a vacuum tank body, the vacuum tank body is connected with a gate valve, the gate valve is connected with a filter, the filter is connected with a vacuum pressure sensor, and the vacuum pressure sensor is connected with a vacuum valve for die casting;
the die comprises a static die frame, a static die, a movable die frame and a movable die which are arranged oppositely, a die cavity is defined between the movable die and the static die, the die cavity is connected with the pressure chamber space, and the vacuum degree of the die cavity can reach below 5 kPa; the die is provided with a spreader cone which can move horizontally, and the spreader cone is connected with a driving oil cylinder; the movable mould frame and the movable mould are connected with a mould locking system, and the movable mould frame are driven to move through the mould locking system;
the Z-shaped liquid lifting pipe is communicated with a plurality of sections of pipelines and comprises a molten metal immersion section, a molten metal heat preservation section and an inert gas storage section;
in addition, according to the utility model discloses high vacuum die-casting equipment of release is exempted from to heat preservation stove still has following additional technical characterstic: according to the utility model discloses an embodiment, Z shape stalk further includes in the high vacuum die casting equipment of release is exempted from to the heat preservation stove: the metal liquid immersion section is always immersed below the liquid level of the metal liquid in the air pressure pouring type heat preservation furnace; the molten metal heat preservation section is always kept above the liquid level of molten metal immersed in the air pressure pouring type heat preservation furnace; preferably, the molten metal heat preservation section of the lift pipe is S-shaped, so that the molten metal scum can be filtered; as a preferable scheme, the shape of the liquid metal heat preservation section of the lift pipe is a straight pipe shape, and the liquid metal heat preservation section can also play a role in filtering liquid metal scum; the lower end of the metal liquid heat preservation section of the riser tube has an inclination angle of 5-30 degrees with the horizontal direction; the inert gas storage section can be used as a passage for molten metal and can also be used for storing gas.
The high vacuum die casting equipment middling pressure that heat preservation stove exempted from release shoots the device and further includes: a radial blind hole is formed in the middle of the lower side of the injection punch and communicated with a pouring gate below the pressure chamber, and the radial blind hole is communicated with an axial blind hole in the injection punch; the axial blind hole is connected with an axial channel inside the injection piston rod; the end of the radial channel is connected with a pure inert gas supply device.
The high vacuum die casting equipment middling pressure that heat preservation stove exempted from release penetrates the device and further includes: the outer circumferential surface of the injection punch is sequentially provided with 4 sealing elements of a combined expansion ring A, a sealing washer B and a combined expansion ring B; wherein the combined expansion ring is flush mounted with the end face, and the sealing gasket is mounted at a distance of 100 mm and 200mm from the end face.
In a second aspect of the present invention, a casting method is provided.
According to the embodiment of the utility model, the high vacuum die casting equipment of release is exempted from to foretell holding furnace is adopted in the method, and includes: (1) the clamping mechanism clamps the static die and the movable die at a certain clamping force; the sprue spreader driving cylinder drives the sprue spreader to seal the connecting end of the pressure chamber and the cavity; the injection system drives the injection piston rod to drive the injection punch head to move forward to close the sprue gate of the pressure chamber; (2) the air pressure pouring type heat preservation furnace applies air pressure through the air pressure control device to enable the molten metal to be close to the pressure chamber; then filling inert gas into the riser tube, wherein the filled inert gas keeps the molten metal in a molten metal heat preservation section and a molten metal immersion section of the riser tube; (3) the pressure chamber vacuum opening and closing cylinder and the vacuum valve for die casting are opened, and the pressure chamber and the die cavity begin to be vacuumized; (4) after the vacuum pressure sensor in the pressure chamber senses that the vacuum degree of the pressure chamber reaches below 5Kpa, the vacuum opening and closing cylinder in the pressure chamber closes the vacuum channel, and meanwhile, the vacuum pump in the pressure chamber stops running. The injection system drives the injection piston rod to drive the injection punch to retreat to the original point, and a pouring port of the pressure chamber is opened; inert gas and molten metal in the liquid lifting pipe fill a closed space of the pressure chamber under the action of pressure difference, and the inert gas is positioned at the upper part of the pressure chamber and can prevent the molten metal from entering a vacuumizing air channel above the pressure chamber; (5) the sprue spreader comprises a sprue spreader, a pressure chamber, an injection system, an injection plunger rod, a sprue spreader, an injection plunger, a sprue lifter and a sprue lifter, wherein the sprue spreader is driven by the sprue spreader driving cylinder to move back for 5-10mm and stop, the pressure chamber is communicated with a die cavity, the injection system drives the injection plunger rod to drive the injection plunger to advance slowly to close a sprue gate of the pressure chamber and a vacuumizing air channel of the pressure chamber for the second time, inert gas and other residual gas in the pressure chamber are completely pumped out by a vacuumizing device in the die, molten metal does not cross the sprue spreader, the sprue spreader is completely opened, the injection plunger waits for an injection signal, and redundant molten metal is extruded back to the sprue lifter. (6) Continuously filling inert gas into the inert gas storage section of the Z-shaped riser tube, wherein the filled inert gas keeps the molten metal in the molten metal heat preservation section and the molten metal immersion section of the riser tube; (7) when the vacuum degree sensed by the mold vacuum sensor is not more than 5Kpa, closing a special vacuum valve for die casting of the mold, and simultaneously stopping the operation of a vacuum pump of the mold; the sprue spreader driving cylinder retreats, and the pressure chamber is completely communicated with the die cavity; and (4) sending an injection signal after the sprue spreader driving cylinder retreats to the proper position, and die-casting the sprue spreader by using an injection punch head according to a preset process.
The utility model discloses a high vacuum die casting equipment and casting method that release was exempted from to heat preservation stove can make metal liquid receive the air influence little, and the quantitative pouring of release is exempted from to low-cost high reliability realization, can realize on the basis of evacuation earlier, carries out the injection after satisfying vacuum process conditions again, can also close the vacuum valve in advance when obtaining the high vacuum, and then improve the reliability of mould cavity vacuum, reduce the vacuum system fault rate.
Drawings
FIG. 1 is a schematic structural view of a high vacuum die casting apparatus with a pressure-free holding furnace according to an embodiment of the present invention
Fig. 2 is a schematic structural view of an injection device according to an embodiment of the present invention
In the figure, 1, a shot system; 2, a pressure chamber filter; 3, a pressure chamber vacuum pump; 4, pressing chamber vacuum tank body; 5, a pressure chamber gate valve; 6, a pressure chamber vacuum pressure sensor; 7, a pressure chamber vacuum opening and closing cylinder; 8, a cavity vacuum pump; 9, forming a cavity vacuum tank body; 10, a cavity gate valve; 11, a cavity filter; 12, a cavity vacuum pressure sensor; 13, a vacuum valve for die casting; 14, a mode locking system; 15, injecting a punch; 1510, axial blind hole; 1520 radial blind holes; 16, an air pressure casting type heat preservation furnace; 17, an air pressure control device; 18, a barometric pressure sensor; 19, a riser tube; 20, a pressure chamber; 2010, a pressure chamber sprue gate; 2020, evacuating the air channel; 21, a shunt cone; 22, driving a cylinder by a shunt cone; 23, a stand; 24, injecting the piston rod; 2410, an axial passage; 25, a static mould frame; 26, moving a mould frame; 27, a static mold; 28, moving a mold; 29, combined expansion ring A; 30, combining an expansion ring B; 31, a sealing rubber gasket a; 32, a sealing rubber gasket B; 191, a molten metal section; 192, a molten metal heat preservation section; 193 inert gas storage section.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In one aspect of the utility model, the utility model provides a high vacuum die casting equipment of release is exempted from to heat preservation stove. The high vacuum die casting apparatus of the present invention is described in detail with reference to fig. 1 and 2.
According to the utility model discloses an embodiment, as shown in fig. 1, this high vacuum die casting equipment includes: a die casting machine, a closed type air pressure pouring type holding furnace 16, a pressure chamber vacuumizing system, a cavity vacuumizing system, a die and a Z-shaped liquid lifting pipe 19;
the die casting machine is provided with a machine base 23, and an air pressure pouring type heat preservation furnace 16 is arranged below the machine base 23;
the die casting machine is provided with a pressure chamber 20, a vacuumizing air channel is arranged above the pressure chamber 20, and an installation interface of a liquid lifting pipe is arranged below the pressure chamber;
the die casting machine is provided with an injection punch head 15, and the injection punch head 15 is in threaded connection with an injection piston rod 24; the shot piston rod 24 is connected to the shot system 1, and the shot piston rod 24 is controlled by the shot system 1 to move the shot punch 15 within the pressure chamber 20.
The top of the closed air pressure pouring type heat preservation furnace 16 is provided with an air pressure control device 17 and an air pressure sensor 18; in the continuous die casting process, the internal pressure of the air pressure casting type holding furnace (16) is higher than the atmospheric pressure and is kept constant;
the lower end of the Z-shaped liquid lifting pipe 19 is inserted below the molten metal page in the air pressure pouring type heat preservation furnace 16; the upper end of the Z-shaped riser tube 19 is connected with a pouring port at the lower side of the pressure chamber 20; when the pressure control device 17 controls the pressure in the holding furnace to rise until the pressure sensor 18 reaches a preset value, the molten metal rises in the Z-shaped liquid rising pipe 19 and finally enters the pressure chamber 20.
The cavity vacuumizing system comprises a cavity vacuum pump 8, a cavity vacuum tank body 9, a cavity gate valve 10, a cavity filter 11, a cavity vacuum pressure sensor 12 and a vacuum valve 13 for die casting; the cavity vacuum pump 8 is connected with the cavity vacuum tank body 9 and used for pumping air from the cavity vacuum tank body 9; the cavity vacuum tank body 9 is also connected with a cavity gate valve 10, and the cavity gate valve 10 controls the flow of gas entering the cavity vacuum tank body 9; the cavity gate valve 10 is connected with a cavity filter 11, and the cavity filter 11 filters gas pumped out of a cavity; the cavity filter 11 is connected with a vacuum pressure sensor 12; the vacuum pressure sensor 12 is connected with a vacuum valve 13 for die-casting, and the vacuum valve 13 for die-casting controls the starting and stopping of the vacuumizing of the cavity.
According to an embodiment of the present invention, as shown in fig. 1, the vacuum die casting apparatus may further include: the pressure chamber vacuum pumping system comprises: a pressure chamber vacuum pump 3, a pressure chamber vacuum tank body 4, a pressure chamber gate valve 5, a pressure chamber filter 2, a pressure chamber vacuum pressure sensor 6 and a pressure chamber vacuum opening and closing cylinder 7; the pressure chamber vacuum pump 3 is connected with a pressure chamber vacuum tank body 4, the vacuum tank body 4 is connected with a pressure chamber gate valve 5, the pressure chamber gate valve 5 is connected with a pressure chamber filter 2, the pressure chamber filter 2 is connected with a pressure chamber vacuum pressure sensor 6, and the pressure chamber vacuum pressure sensor 6 is connected with a pressure chamber vacuum opening and closing cylinder 7; the pressure chamber vacuum start-stop cylinder 7 controls the start-stop of the pressure chamber vacuumizing.
According to an embodiment of the present invention, as shown in fig. 1, the vacuum die casting apparatus may further include: the die comprises a static die frame 25, a static die 27, a movable die frame 26 and a movable die 28 which are arranged oppositely; a cavity is defined between the movable die 28 and the static die 27, the cavity is communicated with the pressure chamber 20, and the vacuum degree of the cavity can reach below 5 kPa; the die is provided with a horizontally moving sprue spreader 21, and the sprue spreader 21 is connected with a driving oil cylinder 22; in addition, the movable mold base 26 and the movable mold 28 are connected to the mold clamping system 14, and the movable mold 28 and the movable mold base 26 are moved by the mold clamping system 14.
According to an embodiment of the present invention, as shown in fig. 1, the vacuum die casting apparatus may further include: the Z-shaped liquid lifting pipe 19 is a communication of multi-section pipelines and sequentially comprises from bottom to top: a molten metal immersion section 191, a molten metal heat preservation section 192, and an inert gas storage section 193;
the molten metal immersion section 191 is always kept immersed below the liquid level of molten metal in the air pressure pouring type heat preservation furnace 16;
the molten metal heat-preserving section 192 is positioned in the submerged air pressure casting type heat-preserving furnace 16 and is positioned above the liquid level of molten metal in the furnace;
the inert gas storage section 193 penetrates the inside and outside of the hot metal ladle furnace 16, and can serve as a passage for molten metal and store gas.
According to an embodiment of the present invention, as shown in fig. 1, the vacuum die casting apparatus may further include: the molten metal heat preservation section 192 of the riser pipe 19 is shaped into a straight pipe; the included angle between the molten metal heat preservation section 192 of the riser tube 19 and the horizontal direction is 5-30 degrees, so that the collecting effect on scum in molten metal can be achieved;
the concrete heat-retaining means of the molten metal heat-retaining section 192 of the lift pipe 19 is not particularly limited as long as the temperature of the molten metal to be poured charged into the lift pipe is not easily cooled.
According to an embodiment of the present invention, as shown in fig. 2, the vacuum die casting apparatus may further include: the middle part of the lower side of the injection punch 15 is provided with a radial blind hole 1520 which can be communicated with a pressure chamber pouring gate 2010 below a pressure chamber;
the radial blind holes 1520 communicate with axial blind holes 1510 inside the injection punch; the axial blind hole 1510 is connected with an axial channel 2410 inside the injection piston rod; the tail end of the axial channel 2410 is connected with an inert gas supply device; thus, the inert gas is filled into the inert gas storage section 193 of the riser tube 19, and the pressure generated by the filled inert gas keeps the molten metal in the molten metal heat preservation section 192 and the molten metal immersion section 191 of the riser tube 19;
according to an embodiment of the present invention, as shown in fig. 2, the vacuum die casting apparatus may further include: the outer circumferential surface of the injection punch is sequentially provided with a combined expansion ring A29, a sealing rubber gasket A31, a sealing rubber gasket B32 and a combined expansion ring B30;
the combined expansion ring A29 and the combined expansion ring B30 consist of beryllium bronze expansion rings and die steel expansion rings and are arranged flush with the end face of the punch; the distance between the sealing rubber gasket A31 and the sealing rubber gasket B32 and the punch end face is 100 mm and 200 mm; the sealing elements at 4 positions enhance the sealing performance of the pressure chamber, can prevent external gas in the pressure chamber 20 from entering the pressure chamber 20 through a matching gap, and can also prevent molten metal in the pressure chamber 20 from entering the matching gap between the injection punch 15 and the pressure chamber 20.
The section of the tap cone (21) is trapezoidal, and the bottom angle of the tap cone on the side contacting molten metal is 45-92 degrees.
In one aspect of the utility model, the utility model provides a high vacuum die casting method adopting the device; referring to fig. 1 and 2, the method includes steps S100-S800:
s100: the clamping mechanism clamps the static mould and the movable mould under a certain clamping force; the shunting cone driving cylinder 22 drives the shunting cone 21 to seal one end of the pressure chamber 20;
the injection system 1 drives an injection piston rod 24 to drive an injection punch head 15 to translate towards the direction of the spreader cone 21 and overlap with the position of a pouring gate 2010 of the pressure chamber; at this time, the radial blind hole 1520 on the lower side of the outer cylindrical surface of the injection punch 15 is communicated with the pouring gate 2010 below the pressure chamber;
s200: the air pressure pouring type heat preservation furnace 16 applies air pressure through an air pressure control device 17, and when the applied air pressure reaches a value set by an air pressure sensor 18, the molten metal rises in the liquid lifting pipe to be close to the pressure chamber; meanwhile, the pure inert gas supply device fills high-pressure argon into the inert gas storage section 193 of the lift tube 19; the metal liquid level in the riser tube 19 is lowered by the filled high-pressure argon, and the metal liquid is kept in the metal liquid heat preservation section 192 and the metal liquid immersion section 191 of the riser tube;
the argon gas flow path is from the axial passage 2410 in the shot piston rod 24 to the axial blind hole 1510 in the shot punch 14, then from the radial blind hole 1520 in the shot punch 14 to the gate 2010 of the pressure chamber, and enters the inert gas storage section 193 of the riser tube 19;
s300: after the inert gas is filled, a vacuum start-stop cylinder 7 above the pressure chamber and a vacuum valve 13 for die casting above the cavity are opened, and the pressure chamber and the cavity of the die are vacuumized; simultaneously starting a pressure chamber vacuum pump 3, a cavity vacuum pump 8, a pressure chamber gate valve 5, a cavity gate valve 10, a pressure chamber filter 2 and a cavity filter 11;
s400: after the pressure chamber vacuum pressure sensor 6 senses that the vacuum degree of the pressure chamber reaches below 5Kpa, the pressure chamber vacuum opening and closing cylinder 7 closes the vacuum channel, and the pressure chamber vacuum pump 3 stops running; the injection system 1 drives the injection piston rod 24 to drive the injection punch head 15 to retreat to the original point of S100, and a pouring port 2010 of the pressure chamber is opened; argon and molten metal in the riser tube 19 fill the closed space of the pressure chamber 20 under the action of pressure difference, the argon entering the pressure chamber 20 is positioned at the upper part of the pressure chamber 20, and the molten metal is prevented from entering the vacuumizing air channel 2020 above the pressure chamber 20;
s500: after the pressure chamber 20 is filled with argon and molten metal, the sprue spreader driving cylinder 22 retreats to drive the sprue spreader 21 to move 0.1-10mm to stop, a gap is formed between the sprue spreader 21 and the pressure chamber 20, and the pressure chamber is communicated with the cavity through the gap; the injection system 1 drives the injection piston rod 24 to drive the injection punch 14 to advance slowly to close the pressure chamber pouring gate 2010 and the pressure chamber vacuumizing air passage 2020 again, so that argon and other residual gases in the pressure chamber enter the cavity through the gap and are further pumped out by the cavity vacuum pump; subsequently, the tap cone 21 returns to the initial position at the beginning of the present step;
s600: the pure inert gas supply device fills inert gas into the riser tube again, and the filled inert gas keeps the molten metal in the molten metal heat preservation section and the molten metal immersion section of the riser tube; therefore, in the process of waiting for the next production, the holding furnace does not need to release pressure, and the situation that high-temperature molten metal is in contact with a pressure chamber and a punch for a long time is avoided;
s700: when the cavity vacuum sensor 12 senses that the vacuum degree meets the process set value, the vacuum valve 13 for die casting is closed, and the cavity vacuum pump 8 stops running; the shunting cone driving cylinder 22 retreats, and the pressure chamber 20 is completely communicated with the cavity; after the sprue spreader driving cylinder 22 retreats in place, the injection punch is die-cast according to a preset process; the preset process comprises quick pressing, pressurizing, pressure maintaining and cooling;
s800: after die casting is finished, opening the die in place and returning the core, ejecting and taking out the workpiece; and the punch head returns to the gate position of the pressure chamber to wait for the production of the next die.
The present invention is not limited to the items shown in the above embodiments. Variations and adaptations of the present invention that occur to those skilled in the art based on the description herein and the known technology are acceptable and encompassed by the present invention as claimed.
Claims (6)
1. The utility model provides a high vacuum die casting equipment of release is exempted from to heat preservation stove which characterized in that includes: the device comprises a die casting machine, an air pressure casting type holding furnace (16), a pressure chamber vacuumizing system, a cavity vacuumizing system, a die and a Z-shaped liquid lifting pipe (19);
the die casting machine is provided with a machine base (23), a reserved space is arranged below the machine base, and the reserved space can be used for installing and moving the air pressure casting type heat preservation furnace (16); the die casting machine is provided with a pressure chamber (20), a vacuumizing air passage is arranged above the pressure chamber, and an installation interface of a liquid lifting pipe is arranged below the pressure chamber; the die casting machine is provided with an injection punch head (15), and the injection punch head is in threaded connection with an injection piston rod (24); the injection piston rod is connected with the injection system (1);
the air pressure pouring type heat preservation furnace (16) is closed, and the top of the air pressure pouring type heat preservation furnace is provided with an air pressure control device (17) and an air pressure sensor (18); in the continuous die casting process, the internal pressure of the air pressure casting type holding furnace (16) is higher than the atmospheric pressure and is kept constant;
the Z-shaped liquid lifting pipe (19) is a nonlinear hollow pipeline, and the lower end of the Z-shaped liquid lifting pipe is inserted below the liquid level of the molten metal in the air pressure pouring type heat preservation furnace (16); the upper end of the Z-shaped liquid lifting pipe (19) is connected with a pouring gate at the lower side of the pressure chamber (20);
the cavity evacuation system includes: a cavity vacuum pump (8), a cavity vacuum tank body (9), a cavity gate valve (10), a cavity filter (11), a cavity vacuum pressure sensor (12) and a vacuum valve (13) for die casting; the die cavity vacuum pump is connected with the die cavity vacuum tank body, the die cavity vacuum tank body is connected with the die cavity gate valve, the die cavity gate valve is connected with the die cavity filter, the die cavity filter is connected with the die cavity vacuum pressure sensor, and the die cavity vacuum pressure sensor is connected with the vacuum valve for die casting;
the plenum evacuation system comprises: a pressure chamber vacuum pump (3), a pressure chamber vacuum tank body (4), a pressure chamber gate valve (5), a pressure chamber filter (2), a pressure chamber vacuum pressure sensor (6) and a pressure chamber vacuum opening and closing cylinder (7); the pressure chamber vacuum pump is connected with a pressure chamber vacuum tank body, the pressure chamber vacuum tank body is connected with a pressure chamber gate valve, the pressure chamber gate valve is connected with a pressure chamber filter, the pressure chamber filter is connected with a pressure chamber vacuum pressure sensor, and the pressure chamber vacuum pressure sensor is connected with a pressure chamber vacuum start-stop cylinder;
the die comprises a static die frame (25), a static die (27), a movable die frame (26) and a movable die (28) which are arranged oppositely, a cavity is defined between the movable die (28) and the static die (27), the cavity is connected with the pressure chamber space, and the vacuum degree of the cavity can reach below 5 kPa; the die is provided with a spreader cone (21) capable of moving horizontally, and the spreader cone is connected with a driving oil cylinder (22); the movable mould die carrier and the movable mould are connected with a mould locking system (14), and the movable mould die carrier are driven to move through the mould locking system.
2. The high vacuum die casting equipment without pressure relief of the holding furnace according to claim 1, characterized in that:
the Z-shaped liquid lifting pipe (19) is communicated with a plurality of sections of pipelines and sequentially comprises the following components from bottom to top: a molten metal immersion section (191), a molten metal heat preservation section (192) and an inert gas storage section (193);
the molten metal immersion section (191) is always immersed below the liquid level of molten metal in the air pressure casting type heat preservation furnace (16);
the molten metal heat-preserving section (192) is positioned above the liquid level of molten metal in the submerged air pressure casting type heat-preserving furnace (16);
the inert gas storage section (193) penetrates through the inside and the outside of the air pressure casting type heat preservation furnace (16) and can be used as a channel of molten metal and store gas.
3. The high vacuum die casting equipment without pressure relief of the holding furnace according to claim 1 or 2, characterized in that: the shape of the metal liquid heat preservation section (192) of the riser pipe is set to be S-shaped or straight pipe shape;
the included angle between the metal liquid heat preservation section (192) of the riser tube and the horizontal direction is 5-30 degrees.
4. The high vacuum die casting equipment without pressure relief of the holding furnace according to claim 1, characterized in that:
the middle part of the lower side of the injection punch head (15) is provided with a radial blind hole (1520) which can be communicated with a pressure chamber pouring port (2010) below a pressure chamber;
the radial blind holes (1520) communicate with axial blind holes (1510) inside the injection punch; the axial blind hole (1510) is connected with an axial channel (2410) inside the injection piston rod; the end of the axial channel (2410) is connected with an inert gas supply device.
5. The high vacuum die casting equipment with the pressure relief free function of the holding furnace according to claim 1, characterized in that: the outer circumferential surface of the injection punch is sequentially provided with a combined expansion ring A (29), a sealing washer A (31), a sealing washer B (32) and a combined expansion ring B (30);
the combined expansion ring consists of a beryllium bronze expansion ring and a die steel expansion ring and is flush with the end face of the punch;
the sealing washer is arranged at a distance of 100-200mm from the end face of the punching head.
6. The high vacuum die casting equipment with the pressure relief free function of the holding furnace according to claim 1, characterized in that: the section of the shunt cone (21) is trapezoidal, and the bottom angle of the contact side of the shunt cone and molten metal is 45-92 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123248222.XU CN217044517U (en) | 2021-12-22 | 2021-12-22 | High vacuum die casting equipment of release is exempted from to holding furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123248222.XU CN217044517U (en) | 2021-12-22 | 2021-12-22 | High vacuum die casting equipment of release is exempted from to holding furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217044517U true CN217044517U (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123248222.XU Active CN217044517U (en) | 2021-12-22 | 2021-12-22 | High vacuum die casting equipment of release is exempted from to holding furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN217044517U (en) |
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2021
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