WO2005072892A1

WO2005072892A1 - Counter-pressure casting machine

Info

Publication number: WO2005072892A1
Application number: PCT/JP2005/001089
Authority: WO
Inventors: Sumio Sobue
Original assignee: Sintokogio, Ltd.
Priority date: 2004-01-28
Filing date: 2005-01-27
Publication date: 2005-08-11
Also published as: JPWO2005072892A1; TW200531764A

Abstract

A counter-pressure casting machine, comprising a molten metal holding furnace (2), a lower die plate (4) disposed above the molten metal holding furnace (2) and having a lower mold (3) fitted to the upper surface thereof, a lifting member (7) liftably disposed above the lower die plate and having an upper mold (6) fitted to the lower surface thereof, a surrounding mechanism (8) fitted to the upper surface of the lower die plate and the lower surface of the lifting member, capable of surrounding the upper and lower molds airtight, and vertically dividable at a specified position, a lifting drive mechanism lifting the lifting member, a stoke (10) allowing the molten metal holding furnace to communicate with the upper and lower molds, and a mold opening/closing mechanism (5) installed on the lifting member and in which the upper mold is fitted to the lifting member through the mold opening/closing mechanism.

Description

Specification

Counter pressure machine

Technical field

[0001] The present invention relates to an improvement of a counter pressure machine.

Background art

[0002] Conventionally, there is a counter pressure machine as one of so-called low-pressure machines. Japanese Patent No. 3113948 (Japanese Unexamined Patent Publication No. 05-228,605) discloses a conventional counter pressure machine. This machine comprises a melting and holding furnace in which an upper end opening of a holding furnace body is closed by a furnace lid, and is arranged directly above the melting and holding furnace so as to be able to move up and down, and the furnace lid is mounted on a lower surface and an upper surface is mounted on the upper surface. A lower die plate to which a lower mold is attached; an upper die plate which is disposed directly above the lower die plate so as to be movable up and down and has an upper mold attached to a lower surface; an upper surface of the lower die plate and the upper die An enclosing mechanism mounted on the lower surface of the plate to hermetically enclose the upper and lower dies and dividing the upper and lower dies up and down at predetermined locations, the upper and lower die plates, the upper and lower dies, and the enclosing A lifting and lowering drive mechanism for raising and lowering a mechanism; and a stalk for communicating the melting and holding furnace with the upper and lower molds. Up and down the molten metal through Stoke It is designed to be filled in a mold.

[0003] However, in the conventional counter-pressure machine, the pressure in the melting and holding furnace and the pressure in the surrounding mechanism need to be set to 0.4 to 0.8 MPa. The lifting / lowering drive mechanism, which also has the function of pressing the lid and the surrounding mechanism, becomes a large-scale one that outputs a large force, and as a result, the conventional counter pressure machine has higher rigidity than a general low-pressure machine. It was rigid and expensive.

[0004] Further, in the counter pressure machine described in Japanese Patent No. 3113948, the heights of the upper and lower dies when the upper and lower dies are closed, and the upper and lower dies in the surrounding mechanism. If the heights are different when the parts are joined, there will be gaps between the mating surfaces of the upper and lower molds and the joining surfaces of the upper and lower parts, causing burrs on the product and airtightness of the surrounding mechanism. Is impaired. Therefore, the upper and lower dies and the surrounding mechanism have the same height. Therefore, the conventional counter pressure machine lacked versatility from the viewpoint of upper and lower molds.

[0005] The present invention is intended to solve these problems. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a counter pressure machine having a relatively low rigidity and a low price and having versatility.

Disclosure of the invention

[0006] According to one aspect of the present invention, a counter-pressing machine includes: a melting and holding furnace; a lower die plate disposed on the melting and holding furnace and having a lower mold attached to an upper surface thereof; An elevating member arranged so as to be able to ascend and descend on the rate and having an upper mold attached to the lower surface, and hermetically surrounding the upper and lower molds mounted on the upper surface of the lower die plate and the lower surface of the elevating member. An enclosing mechanism that is capable of being divided up and down at a predetermined location, an elevating drive mechanism that elevates the elevating member, a stoke that communicates the melting and holding furnace with the upper and lower dies, and an elevating member. A mold opening / closing mechanism, wherein the upper mold is a counter pressure machine including a mold opening / closing mechanism attached to the elevating member via the mold opening / closing mechanism.

[0007] The mold opening / closing mechanism of the counter pressure machine according to the above aspect of the present invention includes an actuator that lowers the upper mold with respect to the elevating member and engages the lower mold. As a matter of fact,

[0008] In the counter-pressing machine according to the above aspect, the upper part and the lower part of the surrounding mechanism are joined by lowering the elevating member, while the upper die is engaged with the lower die by opening and closing the die. Performed by the mechanism. As described above, the actuators are separately provided for the elevating member and the mold opening / closing mechanism, respectively, so that the forces can be dispersed, and the rigidity of the machine can be relatively reduced. I do.

[0009] In the counter-pressure machine according to the second aspect of the present invention, a melting and holding furnace in which an upper end opening of a holding furnace main body is closed by a furnace lid, and a dispenser that is movable up and down on the melting and holding furnace. A lower die plate provided with the furnace lid mounted on the lower surface and a lower mold mounted on the upper surface, an elevating member disposed on the lower die plate so as to be vertically movable and having an upper die mounted on the lower surface, The upper die is attached to the upper surface of the lower die plate and the lower surface of the elevating member. An enclosing mechanism capable of hermetically enclosing the lower mold and vertically dividing at predetermined locations, and an elevating drive mechanism for elevating the elevating member, the lower die plate, the upper and lower molds and the enclosing mechanism. A stalk communicating the melting and holding furnace with the upper and lower dies, and horizontally extending outward at a junction between the holding furnace main body and the furnace lid and a division in the surrounding mechanism in the melting and holding furnace. A counterplate that has a pair of upper and lower flanges and a pair of upper and lower flanges and two separate sets of clamp mechanisms that can mechanically clamp the upper and lower flanges. Machine.

[0010] In the second aspect, the elevating member of the counter pressure machine includes an actuator that lowers the upper die with respect to the elevating member to engage the lower die.

[0011] With this configuration, when pouring the upper and lower molds, the holding furnace body, the furnace lid, and the surrounding mechanism are clamped by two sets of clamp mechanisms, respectively. When the mold and the furnace lid are separated and the upper and lower dies are separated, the clamped state by the two sets of clamp mechanisms is released. This makes it possible to open and close the holding furnace body, the furnace lid, and the upper and lower molds independently, and to perform a solid opening and closing operation, thereby pulling a high-precision animal product. Can be manufactured.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode (Examples 1 and 2) of a counter pressure machine according to the present invention will be described with reference to FIGS. In the drawings, similar elements are given the same or similar numbers. In order to make the drawing easier to see, a mechanism for generating a differential pressure between the inside of the surrounding mechanism surrounding the upper and lower molds and the melting and holding furnace is omitted.

First, with reference to FIGS. 1 and 2, a first embodiment of a counter pressure machine according to the present invention will be described.

[0014] As shown in Fig. 1, the counter-pressure machine comprises a platen-shaped machine base 1, a melting and holding furnace 2 installed at the center of the machine base 1, and directly above the melting and holding furnace 2. And a lower die plate 4 having a lower die 3 attached to an upper surface thereof, and an upper die 6 which is disposed directly above the lower die plate 4 so as to be vertically movable and has a lower surface through a die opening / closing mechanism 5. The lifting member 7 (in this embodiment, the lifting frame 7) to which is attached, the upper surface of the lower die plate 4 and the lifting frame 7 An enclosing mechanism 8 which is mounted on the lower surface of the upper and lower molds 6 and 3 in an airtight manner and is separable up and down at a predetermined location, and is mounted on the machine base 1 to raise and lower the elevating frame 7 It comprises two upwardly directed fluid cylinders 9 and 9 as a lifting and lowering drive mechanism, and a stalk 10 that communicates the melting and holding furnace 2 with the upper and lower dies 6 and 3.

[0015] The lower die plate 4 is erected between four pillars 18 standing at four corners of the machine base 1. The two upwardly directed fluid cylinders 9 and 9 are mounted on two of the four columns 18 and 18 that are diagonally located. The elevating frame 7 is mounted on two guide rods 19 attached to the remaining two columns 18 so as to be slidable up and down.

The mold opening / closing mechanism 5 has an upwardly-facing cylinder 11 which is mounted in the center of the elevating frame 7 by vertically penetrating the same, and is fixed to the upper end of the piston rod of the cylinder 11 at the center. And two guide rods 14, 14, which are suspended at the left and right ends of the transfer member 12 and penetrate vertically through the holders 13, 13 mounted on the elevating frame 7. An upper die plate 15 is provided between the lower ends of the guide rods 14 and 14 and has the upper die 6 attached to the lower surface thereof. Further, at a position between the two guide rods 14 on the lower surface of the elevating frame 7, a pressing plate 17 for relatively pressing a product extrusion pin mounting plate 16 attached to the upper die 6 is provided. It is stuck.

The surrounding mechanism 8 includes a lower portion 20 mounted on the upper surface of the lower die plate 4 and an upper portion 21 mounted on the lower surface of the elevating frame 7.

[0018] In the structure configured as described above, first, as shown in Fig. 2A, the fluid cylinders 9 and 9 are contracted to lower the elevating frame 7, and the upper part 21 and the lower part 20 of the surrounding mechanism 8 are joined. Then, as shown in FIG. 2B, the cylinder 11 of the mold opening / closing mechanism 5 is contracted to lower the upper mold 6 and engage the lower mold 3. Thereafter, a fabrication process by a normal counter-pressure method is performed.

Next, a second embodiment of the counterpressure machine according to the present invention will be described with reference to FIGS. As shown in FIG. 3, the counter-pressure machine comprises a melting and holding furnace 2 in which an upper end opening of a holding furnace main body 2A is closed by a furnace lid 2B, and a melting and holding furnace 2 directly above the melting and holding furnace 2. The lower die, which is arranged to be able to move up and down, has the furnace lid 2B attached to the lower surface, and A lifting plate 7 (in this embodiment, an upper die plate 7) having an upper die 6 mounted on the lower die plate 4 so as to be able to ascend and descend directly above the lower die plate 4, and the lower die plate And an upper / lower die plate 7 attached to the upper surface and the lower surface of the upper die plate 7 to hermetically surround the upper and lower molds 6 and 3 and to be able to be divided vertically at predetermined locations. 7 • 4, two upward fluid cylinders 9 • 9 as an elevating drive mechanism for elevating and lowering the upper and lower dies 6 • 3 and the surrounding mechanism 8, the melting and holding furnace 2 and the upper and lower dies. A stoke 10 that communicates 6.3, a first clamp mechanism 31 that can mechanically clamp the divided part of the surrounding mechanism 8, and a joining of the holding furnace body 2A and the furnace lid 2B in the melting and holding furnace 2. And a second clamp mechanism 32 capable of mechanically holding the portion.

Further, the counter pressure machine according to the second embodiment has a downward cylinder 11A as an actuator for moving the upper die 6 up and down, similarly to the counter pressure machine according to the first embodiment. The mold 6 engages with the lower mold 3 when lowered by the cylinder 11.

The melting and holding furnace 2 and the two fluid cylinders 9.9 are mounted on a machine base 13. The surrounding mechanism 8 includes a lower cylinder 24 mounted on the upper surface of the lower die plate 4 and an upper cylinder 25 mounted on the lower surface of the upper die plate 7 (see FIG. 4). At the joint between the lower cylinder 24 and the upper cylinder 25 in the surrounding mechanism 8, a pair of upper and lower flanges 26 and 27 projecting horizontally outward is provided, respectively. A plurality of trapezoidal projections are provided at equal intervals on the outer peripheral side surfaces of the flanges 26 and 27, and the upper and lower flanges 26 and 27 have a gear shape. The space formed by the two protrusions has a shape obtained by reversing the protrusions.

Further, as shown in FIGS. 6 to 5, the first clamp mechanism 31 is separately pivotally supported and fixed to the short cylindrical gripping member 28 mounted on the upper and lower flanges 26 and 27. The gripping member 28 is constituted by two lateral cylinders 30 with the ends of the pinton rods connected to the outer peripheral side surfaces of the gripping members 28 with the brackets 29 and 29 facing each other with pins. The gripping member 28 is rotated forward and backward by the length of one of the protrusions described later by the expansion and contraction operation of the two lateral cylinders 30. Further, the gripping member 28 has a C-shaped vertical cross section, and the inner surfaces of both upper and lower portions are formed into a slightly larger uneven surface similar to the outer peripheral edges of the upper and lower flanges 26 and 27. In the state shown in FIG. 6, the upper and lower flanges 26 and 27 are And when the gripping member 28 is rotated by the length of one of the projections, the gripping member 28 cannot pass.

As shown in FIG. 5, liners 33 are attached to inner surfaces of upper and lower portions of the gripping member 28 and upper and lower surfaces of the upper and lower flanges 26 and 27, respectively. Reference numeral 33 designates a wedge and a tapered space into which the wedge can be fitted. The gripping member is formed when the projections of the upper and lower flanges 26 and 27 relatively enter between the projections of the gripping member 28. The protrusions 28 can firmly hold the protrusions of the upper and lower flanges 26 and 27. Also, the second clamp mechanism 32 has the same configuration and operation and effect as the above-described first clamp mechanism 31 except that the object is different.

[0024] When pouring the molten metal into the cavity defined by the upper and lower dies 6, 3, the cylinder 30 is contracted from the state shown in FIG. The member 28 is rotated clockwise by a predetermined angle, and the holding furnace body 2A and the furnace lid 2Β, and the lower cylinder 24 and the upper cylinder 25 of the surrounding mechanism 8 are rotated by two sets of first and second clamping mechanisms 31 and 32. Grasp and clamp each. Also, when separating the holding furnace body 2Α from the furnace lid 2 、 and separating the lower cylinder 24 and the upper cylinder 25 for opening the upper and lower dies 6 シリンダ 3, the cylinders 30 28 is rotated counterclockwise by a predetermined angle to release the clamped state by the two sets of first and second clamp mechanisms 31 and 32, respectively.

[0025] In the second embodiment, the gripping member 28 is a force forming a single short cylindrical shape. However, the present invention is not limited to this. For example, the gripping member 28 is divided into two or more pieces, and It is a matter of course that the protrusions on the outer peripheral side surfaces of the lower flanges 26 and 27 and the inner peripheral surface of the gripping member 28 are eliminated so that the upper and lower flanges can relatively enter and exit the gripping member. is there.

[0026] The two embodiments described above are for illustration purposes only, and those of ordinary skill in the art, who are not limiting the invention to those examples, may modify and modify these embodiments. Obviously, the scope of the present invention includes such changes and modifications without departing from the spirit of the invention, and is defined by the appended claims and their equivalents. .

Brief Description of Drawings FIG. 1 is a cross-sectional view of a counter pressure machine according to a first embodiment of the present invention.

FIG. 2A is a cross-sectional view of the machine shown in FIG. 1, illustrating the operation of the machine.

FIG. 2B is a cross-sectional view of the machine shown in FIG. 1, illustrating the operation of the machine.

FIG. 3 is a cross-sectional view of a counter pressure machine according to a second embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view of an enclosing mechanism of the counterpressure machine shown in FIG. 3.

FIG. 5 is a view taken in the direction of arrows V—V in FIG. 4.

[FIG. 6] FIG. 6 is a plan view of a first clamping mechanism of the counterpressure machine shown in FIG.

Claims

The scope of the claims

[1] a fusion holding furnace,

A lower die plate disposed on the melting and holding furnace and having a lower mold attached to an upper surface thereof; and a lifting member disposed to be movable up and down on the lower die plate and having an upper mold attached to a lower surface. ,

An enclosing mechanism that is mounted on the upper surface of the lower die plate and the lower surface of the elevating member and that can hermetically enclose the upper and lower molds and can be vertically divided at predetermined locations; A mechanism, a stalk for communicating the melting and holding furnace with the upper and lower molds,

A mold opening and closing mechanism provided in the elevating member, wherein the upper mold includes a mold opening and closing mechanism attached to the elevating member via the mold opening and closing mechanism.

[2] The counter-pressing machine according to claim 1, wherein the mold opening / closing mechanism includes an actuator that lowers the upper mold with respect to the elevating member and engages the lower mold with the lower mold.

[3] a melting and holding furnace in which the upper end opening of the holding furnace body is closed with a furnace lid,

A lower die plate disposed on the melting and holding furnace so as to be able to move up and down, the furnace lid is mounted on a lower surface, and a lower mold is mounted on an upper surface;

An elevating member disposed on the lower die plate so as to be able to ascend and descend and having an upper mold attached to a lower surface thereof;

An enclosing mechanism which is mounted on the upper surface of the lower die plate and the lower surface of the elevating member, and which can enclose the upper 'lower mold in an airtight manner and can be vertically divided at predetermined locations;

An elevating drive mechanism for elevating the elevating member, the lower die plate, the upper and lower dies, and the surrounding mechanism;

Having a stalk communicating the melting and holding furnace and the upper and lower molds,

The joining portion between the holding furnace main body and the furnace lid in the melting holding furnace and the divided portion in the surrounding mechanism have upper and lower pairs of upper and lower flanges that horizontally project outward, and Two sets of separately provided clamps that can mechanically clamp the upper and lower flanges Having a ramp mechanism,

Counter pressure machine.

[4] The counter-pressing machine according to claim 3, wherein the elevating member includes an actuator which lowers the upper die with respect to the elevating member and engages the lower die with the lower die. Become a counter pressure machine.