WO2005110645A1

WO2005110645A1 - Vertical casting apparatus and vertical casting method

Info

Publication number: WO2005110645A1
Application number: PCT/JP2005/008874
Authority: WO
Inventors: Nagayoshi Matsubara; Takashi Koide; Kiyoshi Fujino
Original assignee: Kosei Aluminum Co., Ltd
Priority date: 2004-05-18
Filing date: 2005-05-16
Publication date: 2005-11-24
Also published as: CA2567290A1; JPWO2005110645A1; US20070215308A1; JP4054051B2

Abstract

A vertical casting apparatus capable of easily manufacturing castings without causing shrinkage cavities and entrainment of gas by filling a molten metal in a mold cavity at a high speed and effectively pressurizing the molten metal in the closed cavity, having excellent working efficiency, and enabling the easy maintenance and a reduction in facility cost and a vertical casting method using the vertical casting apparatus. The vertical casting apparatus comprises an apparatus body having a lower side fixed mold (1) and an upper side movable mold (2), a closing means (13) closing a molten metal in-flow gate (10) formed in the fixed mold (1), and a pressurizing means (20) pressurizing the molten metal in the closed mold cavity which can form the mold cavity and a casting means supplying and filling the molten metal into the mold cavity from the underside. The casting means further comprises a gas-pressurized molten metal pouring ladle (6) attachable to and detachable from the apparatus body.

Description

Vertical manufacturing device and vertical manufacturing method

Technical field

[0001] The present invention relates to a vertical manufacturing apparatus capable of manufacturing a product such as an aluminum alloy and filling a molten metal into a mold cavity from below, in particular, into a mold cavity using a gas pressure pouring pot. The present invention relates to a rigid manufacturing apparatus for supplying and filling molten metal with a downward force and a solid manufacturing method using the same.

Background art

[0002] When manufacturing a product such as a light alloy product, particularly a component that requires strength, a rigid manufacturing device is used in order to prevent gas from being entrained when the molten metal is charged.

[0003] Means for supplying the molten metal to the mold holding cavity of the molten metal holding furnace while preventing the entry of oxides and the entrainment of gas in the powerful rigid molding apparatus include: It is already known to use low-pressure gas (see Japanese Patent Application Laid-Open No. 58-55166). However, low-pressure gas is a force that is effective for supplying molten metal to the mold quantitatively. The simple use of low-pressure gas slows down the filling speed, and the pressure is low. Also, it was not enough to cope with thin products. In addition, in the conventional apparatus, a large amount of molten metal was stored in a molten metal holding furnace fixed to the apparatus main body, and the apparatus was enlarged.

. Further, it is not easy to replenish the molten metal into the molten metal holding furnace fixed to the apparatus main body, and it has been very difficult to perform spray work for cleaning and lubricating the inflow gate of the apparatus main body.

[0004] One of the present inventors has invented a method using an immersion type electromagnetic pump as a means for supplying molten metal to the mold cavity (see Japanese Patent Application Laid-Open No. 2003-266168). In order to cope with high-speed filling, the size of the electromagnetic pump became large and the device became large, which made it difficult to put into practical use.

Patent Document 1: JP-A-58-55166

Patent Document 2: Japanese Patent Application Laid-Open No. 2003-266168

Disclosure of the invention

Problems the invention is trying to solve [0005] In the production by the rigid production apparatus, in order to produce a high-quality product, particularly a thin and large-sized product, it is necessary to fill the mold cavity with the molten metal at a high speed. In addition, in order to prevent mixing of oxidizing substances and gas entrainment, which may cause defective defects in the manufactured product, and to prevent shrinkage cavities caused by coagulation shrinkage, a sufficient amount of molten metal must be filled with a downward force. It is necessary to replenish the molten metal by effectively pressurizing it. In this case, it is necessary to simplify the structure of the entire cabin structural building apparatus in order to reduce troubles during operation. And work efficiency and ease of maintenance are also very important factors.

[0006] An object of the present invention is to fill a mold cavity with molten metal at a high speed and effectively pressurize the molten metal in the closed cavity to produce a product without shrinkage cavities and without gas entrapment. An object of the present invention is to provide a vertical manufacturing apparatus which can be easily manufactured, has a high working efficiency, is easy to maintain, and has a low equipment cost, and a solid manufacturing method using the solid manufacturing apparatus. Means for solving the problem

[0007] The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and by using a gas pressure pouring pot that can be attached and detached to and from the apparatus main body, work efficiency is high, maintenance is easy, and equipment costs are low. In addition to being a mold making device, it is possible to supply molten metal at a high speed by increasing the gas pressure of a vigorous gas pressurizing pouring pot, and to obtain a manufactured product that is free from mixing of an oxidizing film and gas entrapment. They found that they could be made and completed the present invention. Furthermore, if the molten metal in the cavity is filled with the molten metal and the pressure is effectively applied to the molten metal in a closed state by shortening the pressure transmission distance at multiple locations, no shrinkage cavities occur and the oxide film The present inventors have found that it is possible to manufacture a manufactured product without mixing of gas and entrainment of gas, and have completed the present invention.

That is, the present invention provides (1) a lower fixed mold and an upper movable mold capable of forming a mold cavity, a closing means for closing a molten metal inflow gate formed in the fixed mold, A rigid body having a pressurizing means for pressurizing the molten metal in the mold cavity closed in the mold cavity, and a filling means for supplying and filling the molten metal into the mold cavity with a downward force. A vertical pressurizing apparatus characterized in that the filling means has a gas pressurized pouring pan which can be attached to and detached from the main body of the apparatus; and (2) a gas pressurized pouring pan is mounted on the main body of the apparatus. The vertical manufacturing apparatus according to the above (1), wherein a closed structure is formed by being mounted. Or (3) the gas pressurized pouring pan is provided with a built-in stalk, and the upper end of the built-in stalk is brought into close contact with the main body of the apparatus to form a closed structure. Or (4) the main body of the apparatus is provided with a built-in stalk and the upper end of the gas pressure pouring pot is brought into close contact with the main body of the apparatus to form a closed structure. And (5) the capacity of the vertical press apparatus described in (1) and (5) the gas pressure pouring pot is a capacity capable of accommodating the molten metal necessary for one filling. The vertical manufacturing apparatus according to any one of (1) to (5), wherein the rigid manufacturing apparatus according to any one of (1) to (5) is provided with a heating means. And (7) the filling means has a vacuum suction mechanism for vacuum-suctioning the gas in the mold cavity to vacuum-fill the molten metal in the gas pressure pouring pot. And (8) a cavity for a molten metal solidification zone, wherein the mold cavity has a gas discharge passage and communicates with the gas discharge passage. Is provided in the vicinity of the gas discharge passage, and the vertical manufacturing apparatus according to any one of (1) to (7), and (9) a gas pressure pouring pot, A molten metal supply pipe communicating with an opening provided at a lower portion, and an openable / closable water supply port lid having a sealing force capable of withstanding gas pressurization is provided at a supply port of the molten metal supply pipe; The present invention relates to the die casting apparatus according to any one of (1) to (8).

The present invention also provides (10) a manufacturing method using the rigid manufacturing apparatus according to any one of the above (1) to (9), wherein the molten metal is die-molded through a gas-pressure pouring pot, a hot-roll stoke. After pouring into the cavity and filling the cavity with molten metal, the molten metal inflow gate formed in the fixed mold is closed by closing means, and then the molten metal in the mold cavity is pressurized by pressurizing means. (11) After closing the molten metal inflow gate with the closing means, immediately release the gas pressure in the gas pressurized molten metal pot to the atmosphere, and detach and reattach the main body of the equipment. The required molten metal is supplied to a gas pressurized molten metal pot, mounted again on the main body of the apparatus, and prepared for the next production. The vertical production method described in (10) above, the gas pressure in the douche Yunabe adjusted to LkgZcm ² or more, to characterized in that writing铸a short time at high speed (10) The method according to (10) to (12), wherein the rigid manufacturing method according to (10) or (11) or (13) the manufactured product is a thin, large-sized manufactured product of a light metal alloy. The rigid manufacturing method of Brief Description of Drawings

FIG. 1 is a schematic longitudinal sectional view (at the start of pouring) of a rigid manufacturing apparatus according to the present invention.

FIG. 2 is a schematic vertical sectional view (at the time of hot water supply) of the rigid manufacturing apparatus of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1.

FIG. 4 is an explanatory view showing a filling state of a molten metal in the vertical manufacturing apparatus of the present invention.

FIG. 5 is an explanatory view showing an operation state in the rigid manufacturing device of the present invention following FIG. 4.

FIG. 6 is a schematic vertical sectional view of a mold when the rigid manufacturing apparatus of the present invention is applied to aluminum wheel production.

FIG. 7 is a schematic longitudinal sectional view of a rigid manufacturing apparatus according to another example of the present invention.

Explanation of symbols

1 Fixed mold

2 Movable mold

3 Fixed platen

4 Movable platen

6 Hot pot (gas pressurized hot pot)

7, 16 molten metal

8 hot water

8a Surface of hot water supply pipe

9 Mold cavity

10 circular gate

11 Cavity first pool

12 Side gate

13 Blocking pin

14 Pressure stem

15 jet

17 Air gap for pressurized stem melt solidification zone

18 Pressurized stem gas discharge gap

19 Cavity second pool Pressure pin

Cavity for pressurized pin molten metal solidification zone Peripheral gas discharge space for pressurized pin Piston for pressurized stem Piston for closed pin

Hydraulic cylinder

a, 26b, 26c Pressure oil inlet Pressurized stem Seal packing Sealing pin Seal packing Pressurized stem Gas exhaust passage Caro pressure pin Piston

Pressure pin hydraulic cylinder Pressure oil inlet

Pressure pin Seal packing Pressure pin Gas exhaust passage Mold seal groove

Pressurized stem cooling water hole

Pressure pin cooling water hole

Pouring pot seal packing Stoke seal packing

Pressurized gas inlet

Hot water ladle

Perimeter type

Molten supply pipe

Hot water supply sleeve

Hot water supply PI

Hot water lid 48 Gas inlet gas section

49 Gas outlet

9a Aluminum wheel hub

9b Aluminum wheel spokes

9c aluminum wheel rim flange

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] As a rigid mold manufacturing apparatus of the present invention, a closing means for closing a molten metal inflow gate formed in a lower fixed mold, an upper movable mold, and a fixed mold capable of forming mold cavities. And a vertical body having a pressurizing means for pressurizing the molten metal in the closed mold cavity, and a filling means for supplying and filling the molten metal into the mold cavity with a downward force. There is no particular limitation as long as the charging means has a gas pressurized hot water pot that can be attached to and detached from the apparatus main body. The rigid manufacturing apparatus of the present invention has a high working efficiency and is easy to maintain. In addition to a rigid manufacturing device with low equipment cost, the rigid manufacturing device of the present invention can be used to produce a product having no shrinkage cavities and no entrainment of gas at the time of solidification, particularly a thin and large-sized product. Can be suitably manufactured. Such a product is not particularly limited, but a light metal alloy, particularly an aluminum alloy having a large solidification shrinkage is preferable. Since aluminum shrinks by about 7% when it solidifies, the method of the present invention, which can prevent the occurrence of shrinkage cavities, is based on a melt made of a light metal alloy with a large solidification shrinkage such as an aluminum alloy. It can be applied particularly advantageously when manufacturing the above-mentioned structure.

[0013] The gas pressurized pouring pot in the filling means is a pouring pot capable of gas pressurization, and is not particularly limited as long as it is a pouring pot that can be attached to and detached from the apparatus main body. For example, a gas-pressure pouring pot needs to be closed.For example, a gas-pressurized pouring pot with an open top can be closed to provide a closed structure. Is preferably formed. As a configuration in which a closed structure is formed by being attached to the apparatus main body, the gas pressurized hot pot has a built-in stalk. Specifically, for example, the upper surface of the stalk is pressed against the lower surface of the gate entrance of the mold to form a closed structure. Structure can be formed. Further, when the apparatus main body is provided with a built-in stalk, the upper end of the gas pressure pouring pan can be brought into close contact with the apparatus main body to form a hermetically sealed structure. The upper surface of the fixing plate can be pressed against the lower surface of the fixed plate to form a hermetic structure, or can be pressed into a seal packing provided at the lower portion of the fixed plate of the fixed die to form a hermetic structure. At this time, it is preferable that the upper part of the gas pressurized hot pot is made smaller than the lower part so as to be easily sealed to the apparatus body.

[0014] By using a gas pressure pouring pot that can be attached to and detached from the apparatus main body as described above, the molten metal above the (removed) gas pressure pouring pot (open portion) is introduced using, for example, a hot water supply ladle. Therefore, the molten metal can be replenished very easily. In addition, the gas pressure pouring pot can be attached and detached, and spraying work can be performed for cleaning and lubrication of the inflow gate of the main body of the apparatus, so maintenance is very easy and easy.

[0015] Further, the gas pressure pouring pot may include a molten metal supply pipe (a molten metal supply passage) communicating with an opening provided at a lower portion thereof. In this case, a gas supply port of the molten metal supply pipe is provided with a gas supply port. An openable and closable hot water supply lid with a sealing force that can withstand pressure is provided. Here, the lower part of the gas pressure pouring pot in which the opening is provided means a position below the level of the molten metal in the molten metal pot (when filled), and the molten metal can be poured more efficiently. , And Z or the Stoke force can drop the molten metal more efficiently, and therefore, it is preferable that the portion is located below the lower end of the embedded Stoke. In this case, it is not necessary to remove and move the gas pressurized molten pot when supplying hot water, but when removing and supplying hot water, the moving distance can be shortened and work can be performed more efficiently. Can be.

[0016] It is preferable that a powerful gas pressure pouring pan is provided with a heating means, so that the generation of a solidified layer can be suppressed, and the flow of the hot water is good, and the occurrence of defective products can be suppressed as much as possible. It becomes.

[0017] Further, the capacity of the gas pressurized hot pot is, for example, from the viewpoint of preventing the apparatus from being enlarged and the ease of transporting the gas pressurized hot pot, for example, so that the molten metal required for filling once to three times can be accommodated. It is more preferable that the capacity is sufficient to accommodate the molten metal necessary for one filling. By setting the capacity to accommodate the molten metal necessary for one pouring, the amount of molten metal in the pouring pot at each pouring is always constant, so that it is easier to continuously In addition to the above, filling can be performed, and the operation can be stably performed by suppressing the mixing of oxidizing substances and entrainment of gas. In other words, in the case of multiple volumes, the liquid level at each filling is different, and it is necessary to make fine adjustments to the pressure.However, the capacity that can accommodate the molten metal required for one filling By doing so, there is no need to make such fine adjustments.

[0018] In addition, the downsizing of such a gas pressurized pouring pot enables the gas pressure to be increased because the volume of the gas portion can be reduced by increasing the level of the molten metal. It enables high-speed supply of molten metal, high supply speed, and reduction of shot time lag, and enables high-quality structure, thin-walled, large-sized structure to be manufactured. Further, by using such a pouring pot, the production cycle time is shortened, so that the productivity is also improved.

Further, it is preferable that the filling means has, in addition to the gas pressure pouring pot, a vacuum suction mechanism for vacuum suctioning the gas in the mold cavity to vacuum-fill the molten metal in the gas pressure pouring pot. Thus, the mold cavity can be filled with the molten metal at a high speed, and the gas in the mold cavity can be discharged to prevent the entrapment of the gas. This vacuum suction can be performed through a gas discharge passage described later.

[0020] The mold cavity includes a cavity product section and a cavity section, which are preferable for a mold cavity capable of producing a thin and large-sized product, and the cavity section is provided with a molten metal inflow gate. And a first or second cavity second reservoir located above the vicinity of the end of the cavity product part opposite to the first cavity. Is more preferred. The cavity product section and the first cavity section are communicated via a side gate, and the first cavity section has a larger size and volume than the second cavity section. Is preferred,.

[0021] The lower fixed mold is provided with a communicating portion between a lower pouring pot force and a filling stalk for filling and supplying the molten metal and the first reservoir portion of the cavity, and a molten metal inflow gate is provided in the communicating portion. Is provided. The shape of the powerful molten metal inflow gate is not particularly limited.However, the shape of the circular molten metal inflow gate is preferably smaller than the inner diameter of the stalk in such a case that the shape of the circular molten metal inflow gate is preferred because of the ease of processing and the like. It is preferable to configure as follows. With this configuration, the molten metal that is filled and supplied from below can be ejected into the first cavity of the cavity, and as described later, the molten metal is injected into the stalk, which contributes to the failure of the manufactured product. Hot water It is possible to prevent a chill layer (solidified layer) generated by cooling on the inner surface of the oxidized film ゃ stalk on the surface of the molten metal from being mixed into the product.

The closing means for closing the molten metal inflow gate formed in the fixed mold may be any means provided with a mechanism capable of closing the molten metal inflow gate. For example, a circular molten metal inflow gate may be opened and closed. Specific examples of the closing pin that can be disposed above the gate can be given. In this case, the diameter of the insertion portion of the closing pin into the circular molten metal inflow gate is determined by the inner diameter of the circular molten metal inflow gate. However, it is preferable to make them slightly smaller in terms of the sealing performance. It is preferable that the closing pin is held so as to be able to advance and retreat slidably in a liquid-tight manner with respect to the movable mold. When held slidably in a liquid-tight manner, a closing pin may be provided coaxially and slidably in a liquid-tight manner at the center of the pressure stem.

[0023] As described above, when the pressurizing stem and the closing pin are provided in the movable mold above the circular molten metal inflow gate, the circular cavity first molten metal formed in a state where they are withdrawn (elevated). The diameter of the inlet of the reservoir is larger than 1.4 times the diameter of the circular molten metal inflow gate, and the height of the ceiling of the reservoir at the upper limit of the exit of the pressurizing system and the closing pin is the circular molten metal described above. It is preferable to configure the first cavity in the cavity so as to be at least 10 mm higher than the height of the molten metal jet spouted from the inflow gate. If the diameter of the inlet of the basin is 1.4 times or more the diameter of the circular gate, the height h of the molten metal jet will approximately be the velocity of the molten metal passing through the circular gate v and the acceleration of gravity when the g, h = v ² because it can be determined by Z2g formula, when a faster rate of v = 2. OmZsec the铸込rate in the general range, ejection height h = 2. 0 ² / 2g = 0.204mm.

[0024] That is, if the ceiling height is set to 204 + 10 = 214mm, the jet does not collide with the ceiling, forms a free surface, and the oxidized film on the surface of the molten metal is confined without flowing back. Gas entrainment due to collision can also be prevented.

[0025] For example, the pouring speed and filling speed of the molten metal vary depending on the shape of the product, but generally the initial passing speed in the circular gate is preferably 1.0 to 2.4 mZsec. If the height of the ceiling of the first reservoir is more than 10 mm higher than the height of the molten metal jet, a free surface is formed, The oxidizing film remaining on the surface also remains on the surface, and the gas remaining on the upper part of the basin does not become a downward flow while being trapped, and the gas is further removed by the void force around the pressurizing stem. Since the gas is discharged in the sky, no gas is involved in the molten metal. On the other hand, if the jet velocity is low, gas entrapment that will not collide with the ceiling will be eliminated, but the injection time will be long, the speed at which the molten metal will flow through the cavity part will be slow, and during that time cooling and solidification will proceed, and And the flow velocity is further reduced, the filling of the molten metal into the cavity product becomes insufficient, and even if pressurized, the pressure transmission is poor and the possibility of the occurrence of sinkholes increases. Therefore, when the molten metal fills the first basin and starts to enter the product section, it is preferable to increase the gas pressure in the pouring pot so as to increase the pouring speed as fast as possible and to adjust the pouring speed. At this point, the first reservoir is filled with the molten metal, which acts as a resistance and the flow of the inflow gate does not involve the oxide film or gas remaining on the ceiling.

[0026] When the molten metal is supplied by high-pressure gas, the filling speed is increased and the cooling and solidification of the molten metal in the cavity is reduced. However, even if the filling is insufficient, there is no problem because the volume is small and the filling can be performed by sufficient pressurization with a pressurizing stem or the like.

[0027] By forming the cavity first reservoir in the cavity as described above, when the closing pin or the pressurizing stem is advanced (downward), the oxide film or gas existing at the uppermost portion of the reservoir is formed. The wound layer stays at the upper end of the first cavity of the cavity without being extruded, and does not enter the cavity product section. In addition, in the case of pouring using a pouring pot, the pouring port of Stoke is below the surface of the pouring pot, and the oxidized film generated on the pouring surface floats on the pouring surface. Never enter. The slight oxidized film on the surface of the molten metal in Stoke enters the first reservoir in the cavity at the tip of the jet, and flows out to the cavity product section through the side gate. Will not be mixed, and therefore, there will be no defective products and no variation in strength.

[0028] Next, by pressurizing the molten metal filled in the closed mold cavity, it is possible to produce a product in which shrinkage cavities do not occur at the time of solidification and in which gas is not entrained by a jet flow. it can. Pressurizing means for pressurizing the molten metal in the closed mold cavity; The pressurizing stem, which is slidably provided on the movable mold above the first cavity of the cavity and the closing pin is slidably provided at the center thereof, and the first reservoir of the cavity. A concrete example is a pressure pin slidably disposed on a movable mold above the second cavity of the cavity located at a position separated via the cavity product section. It is preferable to provide a plurality of pressure pins. The diameter is preferably 2Z3 to 1 times the depth of the second cavity. Further, it is preferable to use these pressure stems and pressure pins together. In this way, by pressing the molten metal from the pressure stem and the plurality of pressure pins located at separate positions, the pressure transmission distance to the molten metal in the cavity is shortened, and the pressure is uniformly applied to the cavity product part. It is possible to produce a product without shrinkage cavities during coagulation with a small pressurizing pressure. Also, by arranging the pressure stem and the pressure pin at appropriate positions according to the form of the product, the pressure transmission distance of the molten metal in the cavity product part can be further shortened, and the pressure transmission can be made more uniform and sufficient. In addition, shrinkage nests can be prevented with a smaller pressure.

In a conventional manufacturing apparatus, generally, in order to manufacture a product in which shrinkage cavities do not occur at the time of solidification, the pressurizing speed of the molten metal by the pressurizing means is increased and pressurized rapidly. In this case, the pressure transmission is too good, the mold opening force becomes large and burrs are blown, and it is necessary to increase the mold clamping force. However, if the pressurizing speed is reduced, on the other hand, shrinkage cavities will be generated because of the inability to catch up with the solidification and shrinkage of the molten metal. On the other hand, according to the present invention, it is possible to perform uniform and sufficient pressure transmission even with a mold clamping force, which is small enough to prevent burr blowing, so that a molded product which does not generate shrinkage cavities during coagulation with a small pressurizing pressure is manufactured. be able to. As described above, in the present invention, program control is performed such that the advance speed of the pressurizing stem or the pressurizing pin at the time of pressurization becomes a speed adapted to the solidification shrinkage speed of the molten metal in the cavity product section. By adjusting the pressurizing speed, it is possible to prevent the occurrence of sink cavities while preventing burr blowing with a press device with a small mold clamping force.For example, the pressure applied to molten metal during solidification shrinkage where Pascal's principle does not work By controlling the pressurization rate and the pressurization rate in accordance with the solidification rate within a range where burrs are not blown, the oxide film and solidified layer can be mixed with a device with a smaller clamping force of 1Z3 to 1Z5 compared to the conventional high-pressure method. It is possible to obtain a product with a dense structure without gas or entrainment of gas. [0030] In the case of a vertical squeezing method such as squeeze squeezing, if pressurization by the accurac- ing pin (center pin) is accelerated, the plunging plunger is depressed. As the pressure increases after the pressure transmission to the plunger decreases, the solidification of the molten metal in the cavity also progresses during that time, and a large pressure is required to replenish the molten metal. In contrast, in the present invention, since the means for closing the molten metal inflow gate is provided, a step force immediately after the closing of the gate, where solidification is still small, is applied. The pressure transmission distance is short and uniform with a small pressure because pressure is applied by the pressure stem and a plurality of pressure pins arranged at predetermined positions. One can and the child that is responsible for sufficient replenishment filling. As a result, the pressurizing pressure can be reduced, so that the mold clamping force of the mold can be reduced and the cost of the mold clamping device and the mold can be reduced. In addition, the casting speed and the pressure start speed can be made thinner, which is faster than the squeeze casting. In addition, the crystal maintains a good heat transfer by maintaining the contact of the molten metal with the mold surface and has a short cooling time. The smaller the size, the higher the quality, the shorter the production cycle time, and the higher the productivity.

[0031] Further, in the rigid molding apparatus of the present invention, a gas discharge passage capable of discharging gas present in the mold cavity when the molten metal is charged into the mold cavity, and a molten metal communicating with the gas discharge passage. Those having voids for the solidification zone are preferred. As the gas discharge passage, a gas discharge passage formed by a gas discharge hole penetrating the movable mold and a gas discharge gap is preferable. The space for the molten metal solidification zone is preferably provided in the vicinity of the gas discharge passage, particularly preferably in the vicinity of the pressurizing means. For example, after the gas in the cavity is discharged also from the gas discharge passage, the hot metal can be solidified in the space serving as the molten metal solidification zone, and in combination with the closing means, Air vent valves, filters, etc. are provided simply by providing a space for the molten metal consolidation zone, which can easily open and close the inside of the cavity. The inside of the cavity can be easily sealed and closed without using complicated switching valves and valves, and complicated operations such as pressure adjustment are not required when operating the forging equipment, and there is no failure. Therefore, it can be said that the manufacturing apparatus of the present invention is extremely practical. Docking between the upper surface of the stalk and the lower surface of the mold, or the upper surface of the hot pot and the lower surface of the fixed platen The area of the contact surface is small and the pressurized gas does not leak during pouring, and the pressure seal used can be easily made.

[0032] Specifically, the gap for the molten metal solidification zone is a gas discharge gap formed between the outer peripheral surface of the pressure stem and the Z or the pressure pin and the inner peripheral surface of the movable mold. An example of the molten solidification zone molten space may be in communication with the passage, and the powerful molten solidification zone space may be provided concentrically with the pressure stem Z or the pressure pin, and may be provided with the pressure stem and the Z or Z. A specific example of a gap that is a melt solidification zone having an inner diameter that is 1 to 5 mm larger than the diameter of the pressure pin and has a depth (length) of about 10 to 40 mm can be given. In this way, by making the outer diameter of each of the wells slightly larger than the outer diameters of the pressure stem and the pressure pin, a solidified layer formed on the outer peripheral wall of each well is added. The pressure stem Z can be prevented from being pushed into the product by the pressure pin, and the pressure resistance of the pressure stem and the pressure pin can be reduced. As described above, if the space for the molten metal solidification zone is designed to have dimensions that match the temperature and filling speed of the molten metal, the molten metal is cooled and solidified in this space when the molten metal is filled, and the gas discharge space Do not invade.

[0033] In addition, for example, it is preferable that the gas discharge gap has a structure and a size to which the hot water does not flow. For example, the gas discharge gap is provided concentrically with the pressure stem and the Z or the pressure pin. Specific examples of the gas discharge space having an inner diameter that is larger by about 0.4 to 1. Omm than the diameter of the pressure stem and Z or the pressure pin can be given. In order to prevent air from entering when the mold cavity is evacuated, there should be no gas discharge holes and gas discharge passages consisting of gas discharge gaps on the parting surface, and seal packing should be provided if possible. A gas discharge groove is provided to connect the power and leak air to the gas discharge outlet to prevent air from leaking into the mold cavity from outside the mold.

[0034] By the way, assuming that the injection start speed of the molten metal by using the gas pressure pouring pot and the vacuum suction mechanism together is an optimal value of 1.0 to 2.4 mZsec, it is provided close to the outer periphery of the pressure stem or the pressure pin. Although the air resistance in the two-stage gap, such as the gap for the molten metal solidification zone and the gas discharge gap, increases, the number of the pressurizing pins and the arrangement are appropriately selected to provide the above-mentioned gap for the molten metal solidification zone and the gas discharge gap. Installation can also achieve the purpose. In other words, the leading metal is cooled and solidified in the two-stage gap for the melt solidification zone, and the gas discharge is narrower than the gap in the melt solidification zone. Those skilled in the art can easily design a structure that does not enter the void. In addition, in order to reliably cool and solidify the hot water in the space for the molten metal solidification zone, a material with good heat conductivity such as beryllium copper is used for the pressure stem and the pressure pin, and the inside of the structure should be water-cooled. A little monster.

[0035] In the vertical manufacturing apparatus of the present invention described above, the structure of the gas exhaust system around the pressurizing stem and the pressurizing pin is simple, and the occurrence of trouble during operation is reduced. Also, by using gas pressurization in a closed small V, volume pouring pot and vacuum suction mechanism, the molten metal is filled into the mold cavity at high speed, enabling the production of large thin products. On the other hand, since the molten metal of the molten metal flows into the space of the molten metal solidification zone in a narrow space, it solidifies and stops there, and does not enter the gas discharge void passage. Also, by increasing the depth of the first cavity of the cavity, the stroke of the pressurizing stem can be lengthened, and a sufficient volume of molten metal for refilling and solidification shrinkage in the cavity product section is supplied. In addition, the crystal is made smaller by increasing the cooling rate by press-fitting, and it is possible to obtain a stronger product with a denser structure. In addition, the round gate is closed with a closing pin slightly smaller in diameter than the inner diameter of the circular gate, the gas pressure in the pouring pot is released to the atmosphere, and the molten metal in the stalk is returned to the pouring pot quickly by lowering it quickly. The occurrence of troubles due to solidification of solids is prevented.

[0036] Further, when the mold is opened, the pouring pot is taken out of the machine, so that the spraying work for cleaning the inflow gate, cooling the mold surface, and lubricating can be easily and safely performed.

[0037] Further, in the filling device of the present invention provided with the gas pressurizing pouring pot and the vacuum suction mechanism, when filling the mold cavity with the molten metal, the gas in the cavity is almost completely discharged, and after filling, The circular gate can be closed and a sufficient pressure can be applied with a small pressure, so that it can be handled with the conventional high-pressure method of 1Z3 to 1Z5 clamping force. Because of this, the cost of manufactured products can be significantly reduced. In addition, since the molten metal is directly supplied to the lower surface of the pouring pot, it does not mix with the oxidized film, and its passage is short, so that the formation of a solidified layer is minimized. Providing the first reservoir with cavity eliminates the entrainment of gas that would prevent the jet from colliding with the ceiling, and retains a small amount of oxidized film and solidified layer in the first reservoir. As a result, it is possible to obtain a structure having no impurities and a dense structure. Wear. Furthermore, as the pouring pot is small and the gas pressure can be increased, a high filling speed can be secured, thin-walled construction can be achieved, and by moving the pouring pot, the molten metal can be easily replenished and equipment costs can be reduced. The arrangement and operation of the device can be easily performed.

[0038] Further, the rigid manufacturing method of the present invention is a manufacturing method using the above-described hard manufacturing apparatus, wherein the molten metal is poured into the mold cavity through a gas pressure pouring pot, and the molten metal is poured into the mold cavity. After filling the cavity, the molten metal inflow gate formed in the fixed mold is closed by closing means, and then the molten metal in the mold cavity is pressurized by pressurizing means. shall in Nag, for example, by sheet Lumpur sealed push the upper end of the gas pressure injection Yunabe that received the pouring amount one time or more of the molten metal to the seal packing provided on the bottom of the stationary platen, preferably the pouring pot LKG / cm ² The above gas pressure is applied to pressurize the molten metal in the pouring pot, and the molten metal is poured into the mold cavity through the filling stalk. At this time, when the gas caro pot is equipped with a molten metal supply pipe, the same gas pressure may be simultaneously applied to the upward force on the molten metal surface of the supply pipe. Subsequently, after filling the inside of the cavity with the molten metal, the molten metal inflow gate provided in the fixed mold is closed with closing means, and then the molten metal in the mold cavity is pressurized by pressurizing means (pressing pins). A structure with no shrinkage cavities during solidification and without entrainment of gas, preferably a thin, large-sized structure made of a light metal alloy.

[0039] At the retracted position of the pressurizing pin, the filling of the molten metal into the mold cavity is started, the flow rate of the first hot metal is reduced in the second cavity of the cavity, and the gas discharge gap is set in the mold cavity. While discharging the gas, the molten metal in the cavity for the molten metal solidification zone is cooled and solidified, and after the molten metal is filled in the mold cavity, one or more pressing pins are advanced to add the molten metal in the molten metal reservoir. In addition, it is preferable to pressurize.Also, the gas discharge gap force adjacent to the multiple solidification zones of the molten metal can be used to further reduce gas entrapment by performing vacuum degassing, and the molten metal can be formed by the pressurizing stem and multiple pressurizing pins. It is preferable to shorten the pressure transmission distance by pressurizing the pressure. By this refilling, the contact of the molten metal with the mold surface is maintained, good heat transfer is maintained, the crystal is cooled at a high cooling rate, and the crystal is coarsened, resulting in a small crystal structure. When the refilling of the molten metal is completed, the movable mold is raised by the movable platen after a short cooling time, and the lifted product material is moved by the pressure stem, the pressure pin and the extrusion pin. Extrusion with a mold force By extracting the product material by pulling out the system and the pressure pin force, it is possible to obtain a structured product having a dense structure in which the formation of a sink cavity and the incorporation of gas are eliminated. In addition, since the vigorous operation is repeated every time, the solidified molten metal in the space for the molten metal solidifying zone is removed every time, so that the gas discharge passage is not clogged. When the lower surface of the mold is pressed and sealed, the contact area is small and sealing can be done easily.

[0040] It is to be noted that the work can be efficiently performed by manufacturing using a plurality of gas pressurized hot pots. However, immediately after the molten metal inflow gate is closed by the closing means, the gas pressure in the gas pressurized molten pot is immediately increased. It is preferable that the gas is released to the atmosphere and detached from the apparatus main body to supply the required molten metal the next time, and attached to the apparatus main body again to prepare for the next structure. As a result, the structure can be very efficiently performed using one gas pressure pouring pot. When using a gas pressurized hot pot equipped with a molten metal supply pipe, release the gas in the molten metal pot to the atmosphere, and remove or attach the molten metal pot to the molten metal supply pipe with or without removing it. Open the lid and supply the next molten metal. After the molten metal inflow gate is closed by the closing means, the gas in the pouring pot is released to the atmosphere and the gas in the hot water supply port of the molten metal supply pipe is sucked to raise the level of the molten metal in the molten metal supply pipe. By designing the surface to be lowered to the lower end of the stalk, the molten metal in the stalk can be dropped more quickly, and thus the work can be performed more efficiently.

Hereinafter, the present invention will be described more specifically with reference to Examples, but the technical scope of the present invention is not limited to these exemplifications.

FIG. 1 is a schematic vertical cross-sectional view (at the start of pouring) of the rigid manufacturing apparatus of the present invention, FIG. 2 is a schematic vertical cross-sectional view (at the time of hot water supply) of the vertical manufacturing apparatus of the present invention, and FIG. FIG. 4 is an explanatory view showing a state of pushing up the molten metal, and FIG. 5 is an explanatory view showing an operating state following FIG. In Figures 1 to 5, 1 is a fixed mold, 2 is a movable mold, 9 is a cavity product part, 10 is a circular gate, 11 is a first cavity in the cavity, 13 is a closing pin, and 14 is a pressure stem. Reference numeral 17 denotes a space for the molten metal solidification zone (outer circumference of the pressure stem), 19 denotes a second cavity of the cavity, 20 denotes a pressure pin, 21 denotes a space for the molten metal solidification zone (the outer circumference of the pressure pin), and 29 denotes a cap. A pressure stem gas discharge hole, 34 is a pressurized pin gas discharge hole, 40 is a built-in stalk, and 41 is a pressurized gas inlet.

The manufacturing apparatus of the present invention shown in FIGS. 1 to 5 can move up and down to perform mold closing and mold opening. The fixed mold 1 attached to the horizontal fixed platen 3 at the bottom of the machine, the movable mold 2 attached to the horizontal movable platen 4 at the top of the machine, and the gas tank located below the fixed platen 3 A hot pot 6 is provided. By opening and closing the fixed mold 1 and the movable mold 2, the cavity product section 9, the first cavity section 11 and the second cavity section 19, the cavity product section 9 and the first cavity section are provided. A mold cavity having a side gate 12 communicating with the mold 11 is formed. In addition, the mold is installed by setting a mold consisting of a fixed mold 1 and a movable mold 2 on which the insertion stalk 40 is mounted with the movable platen 4 of the mold clamping press (not shown) pulled up. The movable platen 4 is lowered until it comes into contact with the upper surface of the movable mold 2, and the fixed mold 1 is attached to the fixed platen 3 and the movable mold 2 is attached to the movable platen 4. Then, the upper end of the gas pressure pouring pot 6 is pushed into a seal packing 38 provided at a lower portion of the fixed platen 3 and is sealed.

[0044] The fixed die 1 is provided with a filling stalk 40 extending downward at a lower portion thereof, and a circular gate 10 for ejecting the molten metal from the filling stalk 40. When the pressurized gas is supplied from the pressurized gas inlet 41 and the pressure in the cavity is reduced, the molten metal 7 in the pouring pot 6 is pushed up in the pouring stalk 40 and is transmitted through the circular gate 10 of the fixed mold 1 to the cavity. Filled in product part 9. The filling speed at this time is controlled by adjusting the gas pressure in the pouring pot 6 and the degree of vacuum in the cavity so that the molten metal passes through the circular gate 10 at a high speed and jets upward as a jet. Have been.

As shown in FIG. 4, the inlet diameter d of the cavity first reservoir 11 is

1

The outer diameter ds of the pressurizing stem 14 is at least 1.4 times the diameter,

H = v ² Z2g (where h is the jet reaching height, V is the circular gate passage velocity, and g is the gravity The height is set higher than the height h reached by the molten metal jet 15 that has passed through the circular gate 10 calculated by the following equation. Therefore, at the initial stage of filling, the free surface of the molten metal jet 15 is formed above the ceiling of the first reservoir 11 where the jet is filled, and the downward flow of this portion is eliminated, so that the acid slightly remaining on the surface of the molten metal is removed. The dani film remains stationary, and the gas remaining in the upper part of the basin 11 does not get caught in the molten metal 16, so that the gas passes through these circular gates 10. The slightly oxidized film and gas entrainment layer at the tip of the molten metal jet 15 remain on the ceiling, and after the molten metal is filled in the basin section 11, the flow reaches the ceiling even if the charging speed is increased. Only the clean molten metal without passing through the oxidation film or the entrainment of gas passes through the side gate 12 and is filled in the cavity product part 9.

A movable cylinder 2 above the circular gate 10 is provided with a hydraulic cylinder 25 in a liquid-tight manner via a seal packing 27, and the hydraulic cylinder 25 is provided with a pressure stem 1 by hydraulic pressure. A piston 23 for pressurizing stem capable of moving the cylinder 4 into and out of the first cavity 11 is accommodated through a seal packing 27, and the piston 23 for pressurizing stem closes the circular gate 10. A closing piston 24 that can advance and retreat the closing pin 13 that can be moved is housed coaxially with the pressure stem piston 23. After the mold cavity is completely filled with molten metal, the closing pin 13 is advanced by the piston 24 to close the circular gate 10, and then the pressurizing stem 14 is immediately advanced by the piston 23, and the filling in the cavity product section 9 is not completed. The molten metal corresponding to the volume and solidification shrinkage volume of the voids is pressurized and supplied from the first cavity 11 of the cavity. At this time, since the stroke of the pressure stem 14 is large, a sufficient amount of molten metal can be replenished and charged under pressure.

[0047] Even when pressure is applied by the pressure stem 14, an oxidized film slightly generated on the surface of the molten metal in the stalk, and a solidified layer or jet on the surface of the molten metal formed by cooling at the entrance of the circular gate 10. The generated gas entrained layer is collected at the top of the pool 11 by the gate jet 15 and remains at the top of the first pool 11 without being pushed out by the pressurizing stem 14. As a result, there is no defective structure caused by these. Outside the pressurizing stem 14, a two-stage gap including a gas discharge gap 18 communicating with the gas discharge hole 29 and a gap 17 for the molten metal solidification zone is provided. As shown in FIG. 5d, the solidified layer formed by the molten metal coagulation zone gap 17 and the gas discharge space 18 is taken out together with the product material, as shown in FIG. 5d. Is secured every time.

Further, as shown in FIGS. 1 and 2, one or more small second cavity portions 19 are formed above the end portion of the cavity product portion 9. A hydraulic cylinder 31 is disposed in the movable mold above the hydraulic cylinder, and the hydraulic cylinder is provided with a pressure pin 20 by hydraulic pressure. A pressurizing pin piston 30 that can move the piston into and out of the second cavity 19 is housed. The one or more pressure pins 20 have an axis parallel to the mold opening / closing direction and perpendicular to the mold parting surface, and are provided in the movable mold 2 via the seal packing 33 in a liquid-tight manner. I have. After the refilling of the cavity product section 9 is performed by the pressure stem 14, these pressure pins 20 are extruded, and the molten metal of the cavity product section 9 is pressurized through the second cavity 19. ing. The outer diameter of the pressure pin 20 is configured to be slightly smaller than the diameter of the inlet of the second cavity 19 of the cavity. Since the pressure pin 20 also slides each time, the solidified layer formed in the gap 21 of the molten metal solidification zone is pushed out by an extrusion pin (not shown) in a state of being attached to the product material, and remains in the gas passage hole, and the gas is discharged every time. Passages are being secured.

Next, the operation of the above-described rigid manufacturing apparatus will be described. After mold clamping is completed, the molten metal 16 in the pouring pot 6 is pushed up to the first reservoir 11 in the cavity by the pressure of the pressurized gas sent into the gas pressurizing pouring pot 6 and the vacuum suction I force into the cavity. . The molten metal 16 rises in the filling stalk 40, passes through the circular gate 10 of the fixed mold 1, and is ejected (FIG. 4), and is then filled into the cavity product part 9. Generally, since there is flow resistance in the cavity product section 9, the first cavity section 11 above the circular gate 10 before the molten metal reaches the second cavity section 19 below the pressurizing pin. Is filled with the molten metal (Fig. 5a), but when the leading metal enters the gap 17 for the molten metal solidification zone, which is a two-stage void, the passage is narrow, the heat capacity of the molten metal is small, and the cooling area is large. Since the solidification proceeds at a high speed and the fluidity decreases, the tip of the molten metal stops in the middle of the gap 17 for the molten metal solidification zone, and does not solidify and enter the gas discharge gap 18.

When the flow of the molten metal in the cavity is stopped, it is detected as a signal of the completion of filling, and the closing pin 13 is immediately advanced and inserted into the circular gate 10 to close it. (Figure 5b). As described above, the block is closed so as not to flow backward to the molten metal force stroke in the cavity product section 9 and the first cavity section 11, and then the pressure stem 14 is immediately advanced to pressurize the first cavity section. The semi-solidified molten metal in 11 is refilled into the cavity product section 9 (Fig. 5c). When the filling is completed and cooling starts, solidification shrinkage of the molten metal 16 occurs. Therefore, high pressure is applied to the pressurizing stem 14 to advance the molten metal 16 and replenishment is performed according to the solidification shrinkage volume. At this time, contact between the molten metal and the mold surface is maintained. The cooling rate is faster and the crystals are smaller. Further, when the circular gate 10 is closed by the closing pin 13, even if the contact between the closing pin 13 and the circular gate 10 is not perfect, the molten metal existing in the small gap rapidly cools and solidifies, and the first cavity of the cavity is added. Even if it is pressed, the molten metal does not flow back from the circular gate 10 through the pouring stalk 40 to the pouring pot 6. Therefore, as shown in FIG. 2, immediately after closing the circular gate 10 with the closing pin 13, the gas pressure in the pouring pot is released to the atmosphere, and the pouring pot 6 is lowered from the bottom of the stalk in a state where the pressure is reduced without danger. It is lowered to a low position using a vertical moving device (not shown), and the molten metal remaining in the pouring stalk 40 is dropped into the pouring pot 6. The lowered pouring pot 6 is moved to a position outside the machine by a horizontal moving device (not shown), and the molten metal required next time is supplied by the hot water supply ladle 42, and is attached to the main body again to prepare for the next structure.

[0051] In the case of refilling by the pressurizing stem 14, compared with the conventional die casting method, the temperature of the molten metal in the mold cavity is high, the pressurizing distance is short, and the pressure transmission resistance is significantly low. The pressure of the pressurizing cylinder of the stem 14 can be reduced, and the vehicle can be advanced with the hydraulic pressure in the hydraulic cylinder being low. By the refilling by the advance of the pressurizing stem 14, the molten metal refills the cavity product section 9 and the second cavity section 19, and then the pressurizing pin 20 is advanced. The pressurization by the pressurizing pin 20 is started when the flow resistance increases and the hydraulic pressure increases together with the completion of the filling by the pressurizing stem 14, and is detected and started. Replenishment according to the solidification shrinkage volume due to the advancement of the pressurizing stage 14 is difficult because the pressure is difficult to transmit to the opposite end of the cavity product section 9, so the pressurizing pin 20 around the end is operated to pressurize. It is possible to obtain a product with a dense structure without sinkholes due to coagulation contraction over the entire surface. After the cooling and solidification of the molten metal in the cavity product section 9 is completed, the mold is opened and the product material lifted by the movable mold 2 can be extruded and removed by each pressure pin and extrusion pin (Fig. 5d).

FIG. 6 shows a case where the vertical manufacturing apparatus of the present invention is applied to the production of aluminum wheels. After passing through the gate 10, the molten metal enters the knob 9a of the aluminum wheel corresponding to the cavity 11 in the first embodiment, passes through the spoke 9b of the aluminum wheel corresponding to the side gate 12, and then forms a circle. Enter the circumferential rim flange 9c. A second cavity 19 for cavities is provided at several places around the upper end circumference of the rim flange 9c to perform degassing and pressurization. Other operations are The same high-quality aluminum wheels as in Example 1 can be manufactured, and according to this method, the first cavity 11 and the side gate 12 in Example 1 are the same as those in Product 9 (aluminum wheels). In addition, the hole formed by the closing pin becomes a shaft hole of the aluminum wheel, reducing the weight of the first cavity 11, that is, the hub 9 a, and increasing the cooling and solidifying speed. Then, the cycle time is shortened, the productivity of the structure is increased, and the time of the shaft hole in the machine is shortened. The high cooling rate also reduces the size of the crystal and makes it possible to exhibit the beauty of the surface, which is important for the design of aluminum wheels.

FIG. 7 shows another example of the rigid manufacturing apparatus of the present invention. As shown in FIG. 7, in the rigid manufacturing apparatus according to the present invention, the gas pressure pouring pot 7 is provided with a molten metal supply pipe 44 communicating with an opening provided at a lower part thereof, and a hot water supply port 46 of the molten metal supply pipe 44 is provided. In addition, an openable and closable hot water supply lid 47 having a sealing force capable of withstanding gas pressurization is provided. A gas outlet port 49 is provided in a hot water supply sleeve 45 provided above the molten metal supply pipe 44 in the powerful solid-state manufacturing apparatus, and the pressurized gas inlet port above the gas pressurized pouring pan 7 is used when gas is pressurized. The pressurized gas is supplied from 41, and the same pressurized gas is also supplied from the gas outlet 49, so that the molten metal can be supplied and filled more efficiently. Immediately after closing the molten metal inflow gate 10 with the closing means, the gas pressure in the gas pressurized molten metal pot 7 is released to the atmosphere, and the gas in the hot water supply gas section 48 of the molten metal supply pipe 44 is evacuated from the gas outlet 49. By suction, the molten metal surface 8a in the molten metal supply pipe 44 is pulled up, the molten metal surface 8 in the molten metal pot 7 is lowered to the lower end of the stalk 40, and the molten metal in the stalk 40 is dropped more quickly.

Industrial applicability

According to the present invention, the molten metal is filled into the mold cavity at a high speed, and the molten metal in the closed cavity is effectively pressurized to produce a manufactured product without generation of shrinkage cavities and without entrainment of gas. It is possible to provide a vertical manufacturing apparatus which can be easily manufactured, has high working efficiency, is easy to maintain, and has a low equipment cost, and a solid manufacturing method using the solid manufacturing apparatus.

Claims

The scope of the claims

[1] Lower fixed mold and upper movable mold capable of forming mold cavities, closing means for closing the molten metal inflow gate formed in the fixed mold, and the inside of the closed mold cavities. An apparatus body having a pressurizing means for pressurizing the molten metal,

A rigid molding apparatus comprising: a charging means for supplying and filling the molten metal into the mold cavity with a downward force.

A vertical manufacturing apparatus characterized in that the insertion means has a gas pressure pouring pot which can be attached to and detached from the apparatus main body.

2. The rigid manufacturing apparatus according to claim 1, wherein the gas pressurized hot pot is attached to the apparatus main body to form a closed structure.

[3] The vertical structure according to claim 1 or 2, wherein the gas pressure pouring pan has a built-in stalk, and the upper end of the built-in stalk is brought into close contact with the apparatus main body to form a closed structure. apparatus.

[4] The vertical construction apparatus according to claim 1 or 2, wherein the apparatus main body is provided with a built-in stalk, and an upper end of the gas pressure pouring pot is brought into close contact with the apparatus main body to form a closed structure.

[5] The vertical production apparatus according to any one of claims 1 to 4, wherein the capacity of the gas pressurized hot pot is a capacity capable of accommodating a molten metal necessary for one filling.

[6] The rigid manufacturing apparatus according to any one of claims 1 to 5, wherein the gas pressurized hot pot is provided with a heating means.

[7] The method according to any one of claims 1 to 6, wherein the charging means has a vacuum suction mechanism for vacuum-suctioning the gas in the mold cavity to vacuum-fill the molten metal in the gas pressure pouring pot. On-board rigid construction equipment.

[8] The mold cavity according to any one of claims 1 to 7, wherein the mold cavity includes a gas discharge passage, and a gap for a molten metal solidification zone communicating with the gas discharge passage is provided near the gas discharge passage. A rigid structure as described in Item 1.

[9] A gas pressurized pouring pan having a molten metal supply pipe communicating with an opening provided at a lower portion thereof, and an openable / closable hot water supply lid having a sealing force capable of withstanding gas pressurization at a hot water supply port of the molten metal supply pipe. The die-casting apparatus according to any one of claims 1 to 8, further comprising:

[10] A manufacturing method using the rigid manufacturing apparatus according to any one of claims 1 to 9, wherein the molten metal is poured into the mold cavity through a gas caro pouring pot, and the molten metal is poured into the mold cavity. Filling the inside of the mold, closing the molten metal inflow gate formed in the fixed mold with closing means, and thereafter pressurizing the molten metal in the mold cavity with pressurizing means.

[11] Immediately after closing the molten metal inflow gate with the closing means, the gas pressure in the gas pressurized molten metal pot is released to the atmosphere, and the device body is detached and attached. 11. The vertical manufacturing method according to claim 10, wherein the vertical manufacturing method is supplied and mounted again on the apparatus main body to prepare for the next manufacturing.

12. The vertical manufacturing method according to claim 10, wherein the gas pressure in the gas pressure pouring pot is adjusted to lkgZcm ² or more, and the gas is injected at a high speed in a short time.

[13] The product according to claim 10, wherein the product is a thin and large product of a light metal alloy.

2. The rigid manufacturing method according to 2.