JPH05138328A - Turn table type low pressure casting apparatus - Google Patents

Abstract

PURPOSE:To provide a turn table type low pressure casting apparatus, in which the height of a low pressure casting machine rotated together with the table is made to low and die opening stroke for taking out a product is made to large. CONSTITUTION:This apparatus is composed of the low pressure casting machine S radiately arranged on the turn table 4 and a die opening machine T arranged above a product taking out station in this turn table 4, and in each low pressure casting machine S, a movable plate fitting an upper die is arranged in freely attachably and detachably and in the die opening machine T, a lifting plate is provided in freely attachably and detachably to/from the movable plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a station type low pressure casting apparatus in which a plurality of low pressure casting machines are mounted on a turntable.

[0002]

2. Description of the Related Art Generally, a low-pressure casting machine receives a product from an upper mold by inserting a product take-out device between an upper mold and a lower mold which are opened when taking out the product. Therefore, a large mold opening stroke is required. In the conventional station type low pressure casting machine, a casting machine having a large mold opening stroke as described above is mounted on a turntable. However, a low-pressure casting machine with a large mold opening stroke is very tall and heavy, so it is unstable on the turntable, and a solid turntable is required. There was a problem to become.

The present invention has been made in view of the above problems, and is a turntable low-pressure casting in which the height of a low-pressure casting machine that rotates together with a turntable is reduced and a die opening stroke for taking out a product can be increased. The purpose is to provide a device.

[0004]

[Means for Solving Problems] In order to achieve the above object
The turntable type low pressure casting apparatus according to the present invention is a product
Stop at multiple stations including unloading station
A turntab that can be rotated horizontally
And a pressure-type storage device on the turntable at approximately equal intervals.
A holding furnace is provided in a radial pattern, and a lower mold is attached to the top of the pressure holding furnace.
The lower fixing plate and the lower fixing plate.
Installed on the rod that is lifted up and down
It is possible to attach an upper mold corresponding to the lower mold on the lower surface.
A low-pressure casting machine consisting of a mold facility equipped with a moving plate, and
The product take-off station on the turntable
It is arranged so that it can move up and down, and it can be attached to and detached from the movable plate.
And a lifting plate to which a coupling device is attached,
It is what

[0005]

According to the present invention, by adopting the above-mentioned solution means, each low-pressure casting machine on the turntable can be reduced in height to be a stable and lightweight device, and a large mold opening stroke is required. In the product take-out station, the movable plate provided with the upper mold can be largely lifted so that the product take-out device can enter the space between the upper and lower molds.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2, a taper roller 3 rotatably supported by support roller units 2 and 2 in a pit 1,
A circular turntable 4 is supported by 3, and a rotary shaft 5 is integrally attached to the lower center of the turntable 4 and rotatably supported by a bearing unit 6. On the turntable 4, four low-pressure casting machines S are radially installed at substantially equal intervals, and the turntable 4 is intermittently horizontally rotated among A, B, C, and D. Is provided. The D station is a product take-out station, and above the product take-out station D, there is provided a gate-shaped frame 8 which is erected from the front and rear outside position of the turntable 4 to the product take-out station D position. A mold opening machine T is provided on the ceiling of the portal frame 8. A product take-out device U is arranged outside the product take-out station D.

The low-pressure casting machine S will now be described in detail with reference to FIGS. A pressurizing holding furnace 9 is provided at a position corresponding to each station A, B, C, D on the turntable 4, and four leg members are provided so as to surround the pressurizing holding furnace 9. 10 and 10 are erected, and a lower fixing plate 11 is fixed in a horizontal state between the upper ends of the leg members 10 and 10. A central through hole 12 is attached to a central portion of the lower fixing plate 11, and a lower mold 13 is attached on the lower fixing plate 11, and the lower mold 13 and the pressure-type holding plate are held. Stoke tube 9 installed in furnace 9
It is connected to A through the central through hole 12 through an intermediate stalk pipe 9B.

Further, through holes 14 and 14 are formed at positions slightly inside the four corners of the lower fixing plate 11, and the through holes 14 and 1 in the lower fixing plate 11 are formed.
Bearing units 15 and 15 are fixed to the lower surface corresponding to No. 4, and the bearing nuts 15 and 15 have chain wheel rotary nuts 16 and 16, respectively, and the through holes 14 and 14 of the lower fixing plate 11 and the bearings. Trapezoidal threaded rods 17, 17 penetrating the units 15, 15 are screwed together. The lower ends of the four trapezoidal screw rods 17 and 17 are fixedly connected to each other by frames 19 and 19, and the thin circular first connecting rods 20 and 20 are integrally formed on the upper ends of the trapezoidal screw rods 17 and 17, respectively. The upper ends of the first connecting rods 20 and 20 are provided with tapered square holes 21 and 21 penetrating from the outer side to the inner side of the turntable 4.

Between the upper ends of the four trapezoidal screw rods 17, 17, an upper die 22 corresponding to the lower die 13 is attached to the lower surface, and round holes 23, 23 penetrating vertically at the four corners are provided. The movable plate 24 is inserted into the round holes 23, 23 so that the first connecting rods 20, 20 are inserted therethrough.
The first plate on the movable plate 24.
Cylinders 26, 26 are provided corresponding to the tapered rectangular holes 21, 21 of the connecting rods 20, 20, and a wedge 28 fixed to the tip of a piston rod 27 of the cylinder 26 is fitted into the tapered rectangular holes 21, 21. Thus, the movable plate 24 is fixed to the receiving seat 25 and the wedge 28. In addition, the second connecting rods 29, 29 are provided at the inner positions of the round holes 23, 23 on the movable plate 24 in the same manner as the first connecting rods 20, 20.
The second connecting rods 29, 29 are provided upright and are also provided with tapered square holes 30, 30.

Further, a forward / reverse rotation motor 32 is mounted upward on the lower surface of the lower fixed plate 11 via a bracket 31, and two rows of chain wheels 33 are fixed to the rotation shaft of the forward / reverse rotation motor 32. The chain wheel 33 is arranged at an intermediate position between the trapezoidal screw rods 17, 17. Further, chains 34, 34, 34 are hung around between the chain wheel 33 and the chain wheel portions of the rotation nuts 16, 16 with chain wheels, and between the rotation nuts 16, 16.
By the operation of the forward / reverse rotation motor 32, all of the rotation nuts 16, 16, 16, 16 in the chain wheel rotate in the same direction, and the trapezoidal screw rods 17, 17, 17, 17 are moved up and down in synchronization. There is. A rail 35 extending inward and outward from the turntable 4 is laid on the lower fixing plate 11, and its outer end projects slightly outward from the lower fixing plate 11.

Next, the mold opening machine T will be described in detail. An upper fixing plate 41 is provided on a ceiling portion of the gate-shaped frame 8 corresponding to the product take-out station D. A cylinder 42 is attached downward to the upper fixing plate 41, and a piston rod 43 of the cylinder 42 is attached.
An elevating plate 44 is fixedly attached to the lower end of the elongate plate, and the elevating plate 44 is guided by the guide lot 43A.
Circular holes 45, 45 penetrating vertically are formed at positions corresponding to the second connecting rods 29, 29 on the elevating plate 44, and second connecting rods 29, 45 are formed on the elevating plate 44.
Cylinder 4 corresponding to 29 tapered square holes 30, 30
6 and 46 are provided, and wedges 48 are provided so as to be fixed to the tip end of the piston rod 47 of the cylinder 46. The wedge 48 is fitted into the tapered square hole 30 of the second connecting rod 29, 29 via the receiving seat 44A to suspend and fix the movable plate 24 on the lower surface of the elevating plate 44. Further, 41A in the drawing is an extrusion pin attached to the lower surface of the upper fixed plate 41 by screwing, and penetrates through the elevating plate 44 and the movable plate 24, and is extruded (not shown) built in the upper mold 22. The mechanism W is operated to push out the cast product W.

Next, the product take-out device U will be described in detail. A gate-shaped frame 51 is provided outside the product take-out station D.
A rail 52 is laid on the ceiling of No. 1 so as to extend corresponding to the rail 35 laid on the lower fixed plate 11 of each low-pressure casting machine S. On the rail 52, a gate type carriage 54 provided with wheels 53 on the left and right sides is installed so as to be driven by a drive device (not shown).
A cylinder 55 is provided on the ceiling of No. 4 so as to face upward. A table 56 is fixed to the tip of the piston rod of the cylinder 55, and a product receiving jig 57 matching the shape of the cast product W is mounted on the table 56. Reference numeral 58 in the figure is a guide rod.

In such a structure, the turntable 4 is intermittently rotated by a driving device (not shown),
The low-pressure casting machines S, S of the table are intermittently stopped at the positions of stations A, B, C, D, and sequentially rotated. In the low pressure casting machine S moving to the positions of stations A to C during this period, the following is performed. That is, the low-pressure casting machine S moved from the product take-out station D to the station A moves in a mold-closed state as shown in FIGS. 4 and 5. In this state, compressed air is supplied to the pressurizing type holding furnace 9 to supply the molten metal M under pressure into the cavities of the upper and lower molds 22 and 13 through the stalk pipe 9A and the intermediate stalk pipe 9B, and the molten metal in the cavities is supplied. The supply of compressed air is maintained until M has cooled and solidified. When the molten metal in the cavity is solidified, the supply of compressed air is stopped, the compressed air in the pressurizing holding furnace 9 is exhausted, and the molten metal M in the intermediate stalk pipes 9B and 9A is returned to the holding furnace 9. During this time, the turntable 4 is intermittently rotated in sequence, and the low-pressure casting machine S located at the A station sequentially moves from the B station to the C station and reaches the product take-out station D.

When the low-pressure casting machine S reaches the product take-out station D position, the cylinder 42 of the mold opening machine T is extended to lower the elevating plate 44, and the second connecting rod 29 provided on the movable plate 24. , 29 are inserted through the circular holes 45, 45, and the elevating plate 44 is placed on the movable plate 24. Next, the cylinders 46, 46 provided on the lift plate 44
Is extended to move the wedges 48, 48 to the second connecting rods 29, 2.
It is fitted into the tapered rectangular holes 30 of the shaft 9, and the elevating plate 44 and the movable plate 24 are connected and locked. Next, the forward / reverse rotation motor 32
To the movable plate 24 after stopping the energization to and releasing the mold clamping force.
When the upper cylinders 26, 26 are contracted and operated, wedges 28,
28 is a tapered square hole 21, 21 of the first connecting rod 20, 20.
The trapezoidal screw rods 17 and 17 and the movable plate 24 are unlocked. Next, the cylinder 42 of the mold opening machine T is contracted and retracted so that the lift plate 44 and the movable plate 2 are moved.
4, and the upper die 22 to which the cast product W is attached is raised to a predetermined height position and temporarily stopped. On the other hand, the trapezoidal threaded rods 17, 17 are slightly lowered by the reverse rotation of the forward / reverse rotation motor 22.

Next, the carriage 54 of the product take-out device U is moved on the rails 52 and 35 by a driving device (not shown), and the product receiving jig 57 is positioned immediately below the cast product W attached to the upper die 22. Stop. Next, after the cylinder 55 of the carriage 54 is extended and the product receiving jig 57 is raised together with the table 56 and brought into contact with the lower surface of the cast product W, the cylinder 42 is further slightly contracted to push the extrusion pin 41A, Four
1A operates an extruding mechanism (not shown) built in the upper mold 22 to push out the adhering cast product W and transfer it onto the product receiving jig 57, and the cylinder 55 of the carriage 54 contracts and operates. The casting W is lowered together with the table 56. Next, a drive device (not shown) reversely operates to move the carriage 5
6 is returned on the gate-shaped frame 51 to be in the state of FIG.

In this state, after cleaning the upper and lower molds 22 and 13 and setting the core in the lower mold 13 as necessary, the cylinder 42 is extended and the upper mold 22 is moved up and down.
4 and the movable plate 24 together with the circular hole 2 of the movable plate 24.
The first connecting rods 20 and 20 are inserted through 5 and 25, and the upper die 22 is placed on the upper portion of the lower die 13. At this time, the movable plate 2
The lower surface of 4 is slightly raised from the upper end of the trapezoidal screw rod 17 and is stopped. Next, the trapezoidal screw rods 17, 17 are raised by the forward rotation of the forward / reverse rotation motor 32, and the upper end thereof is moved to the movable plate 2.
4 and the lower surface are brought into contact with each other to stop the rising. Next, lift plate 4
Cylinders 46, 46 on the No. 4 contraction operation and wedge 4
8 and 48 are pulled out from the tapered square holes 30 and 30, and the connection lock between the elevating plate 44 and the movable plate 24 is released, and the cylinders 26 and 26 on the movable plate 24 are extended to first connect the wedges 28 and 28. Tapered square hole 2 of rod 20, 20
1, 21 and the movable plate 24 and the trapezoidal screw rod 17, 17
Connect and lock.

Next, the forward / reverse rotation motor 32 is reversely rotated,
A downward force is applied to the movable plate 24 via the trapezoidal screw rods 17, 17 so that the upper mold 22 presses the lower mold 13.
On the other hand, the lift plate 44 is lifted to the lift end by the contraction operation of the cylinder 42. After that, the turntable 4 is rotated and the low-pressure casting machine S at the product take-out station D is moved to the station A, and the above operation is repeated. On the other hand, the cast product W on the product receiving jig 57 is taken out by a known method. In addition to the above casting process, when the upper and lower molds 23 and 13 are preheated by a gas burner or the like before starting the work, or when the molds are replaced, the forward / reverse rotation motor 32 of By the normal rotation, the trapezoidal threaded rods 17, 17 are raised to the position of the required height, and the required work is performed.

[0018]

As is apparent from the above description, the present invention reduces the height of the low-pressure casting machine provided on the turntable and turns the product at the product take-out station where a large die opening stroke of the upper and lower dies is required. Since the mold opening machine that attaches to and detaches from the low pressure casting machine on the table is separately provided, the weight of the upper part of the turntable can be reduced and the height can be reduced, which improves the stability of the turntable. It is remarkable that it has various effects such as downsizing of the device and reduction of manufacturing cost.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a partially omitted front view taken along the line EE in FIG.

FIG. 3 is a view on arrow in FIG.

FIG. 4 is a view on arrow of FIG.

5 is a view as seen from the direction of the arrows in FIG.

FIG. 6 is a partially cutaway enlarged front view of a product take-out station unit.

FIG. 7 is an enlarged vertical side view of a product take-out station unit.

FIG. 8 is a view on arrow in FIG.

[Explanation of symbols]

 4 Turntable S Low-pressure casting machine T-type opening machine U Product take-out device 11 Lower fixing plate 13 Lower mold 22 Upper mold 24 Movable plate 44 Elevating plate

Claims (1)

[Claims] 1. A turntable horizontally rotatably provided so as to stop at a plurality of stations including a product take-out station, and a pressurizing holding furnace is provided radially on the turntable at substantially equal intervals, A lower fixing plate attached to the lower mold is provided on the upper part of the pressure holding furnace, and a rod that is attached to the lower fixing plate and is vertically moved up and down is detachably provided, and the lower surface corresponds to the lower mold. A low-pressure casting machine composed of a mold equipment provided with a movable plate attached with an upper mold, and a detachable connection to the movable plate, which is arranged above the product take-out station on the turntable so as to be movable up and down. A turntable-type low-pressure casting apparatus comprising: a lifting plate having a machine attached thereto.