JPS61232052A - Die cooling device for rotary die casting machine - Google Patents

Abstract

PURPOSE:To rotate a rotary table in the mid-way of cooling of dies and to improve productivity with simple constitution by supplying cooling water to a water feed trough which rotates integrally the rotary table from a water feed pipe inserted into the annular aperture thereof. CONSTITUTION:The cold water from a water feed source is supplied through the water feed pipe 52 into the water feed trough 51 from which the water flows through pipings 55, 56 and a cooling piping 53 toward a discharge trough 57. The water cools the dies 27, 28 in the mid-way of flowing toward said trough, thereby solidifying and cooling a molten metal. A float 62 turns upon attainment of the water in the trough 57 at the prescribed level, then a pump 60 is operated by an electric signal from a sensor 63 to drain the water from the trough 57 until the water therein decreases down to the prescribed level of below. The pump 60 is thereafter intermittently run according to the volume of the water. The rotary table 11 rotates in the mid-way of the cooling and the trough 51 and a cooling water pump 54, pipings 55, 56, 58 rotate as well to insert the pipe 52 into the annular aperture 51a. Since the drain pipe 58 is inserted into the annular aperture 57a in the above-mentioned manner, the cooling of the dies 27, 28 is not hindered even if the table 11 rotates.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a mold opening/closing unit that holds a metal att. In a rotary die casting machine that performs casting work in the order of steps, the gold m after casting is
This relates to the cooling piping inside the mold for cooling.

[Conventional technology]

Die-casting machines are classified into vertical and horizontal casting machines depending on the direction in which the cotton is spread, and vertical casting machines and horizontal casting machines depending on the direction in which the molten metal is poured into the round mold. The basic structure is the same. For example, a forming and tightening vertical casting star die casting machine has a nine-cylinder platen connected vertically with four tie bars, a pace platen, and a moving platen that moves up and down along the tie bars. and a movable mold are mounted facing each other. Then, the moving platen is fully lowered using a mold clamping cylinder installed on the cylinder platen side, and the molten metal is injected into the cavity of the mold by an injection device below the pace platen. One casting cycle is completed by removing the product after opening. Then, before the start of the next casting cycle, the mold is cleaned, a mold release agent is sprayed, and inserts are inserted as necessary.

However, in the conventional die-casting machine as described above, it takes a long time for one casting cycle, including the preparation of Venus, and in particular, it takes a long time to complete one casting cycle, including the preparation of the Venus, and in particular, it takes a long time to perform the casting cycle other than the direct casting process such as mold clamping, injection, and mold opening. Since the process requires more than 70% of the entire process, there is a lot of wasted waiting time and productivity is poor.

[Problem that the invention seeks to solve]

Therefore, the applicant has developed a complete rotary die casting machine with the aim of significantly improving productivity. This is a position where the outer circumference of the rotary table is divided into multiple parts in the same direction.
Twenty-two mold opening/closing bits are installed to hold the Venus, and each operation is performed in the order of steps while rotating this rotary table and stopping at each of a plurality of work stations arranged on its rotation locus.

However, die casting machines require a cooling device made of gold to solidify and cool the molten metal in a short time, but rotary die casting machines require a rotary table that holds the mold opening/closing unit in which the mold is attached. Since the water is constantly rotating, if you try to circulate cold water to Venus, which is always at a low temperature, it will be difficult to connect the water supply or drain pump installed outside the machine or on the work station side to the water inlet and drain on the Venus side. Because it has not been developed,
This was an obstacle to the commercialization of rotary die-casting machines.

[Means for solving problems]

In order to solve these problems, the present invention provides a rotary table that is equipped with a plurality of mold opening/closing units and rotates intermittently, and a water supply machine that rotates integrally with the rotary table. A water supply pipe from the water supply source of the non-rotating part is inserted into the opening, and the bottom of this water supply machine and the inlet of the cooling pipe in the mold are connected with a circulation pipe with a pump metal, and water is drained to the non-rotating part side. A gutter was provided, and a drain pipe from the outlet of all indoor cooling piping was inserted into the annular opening opening upward, and a drainage means was connected to the gutter.

[Effect]

With this configuration, at each work station where the rotary table rotates and stops, each work is performed on the open/close unit 11, and the annular opening is connected to the water supply machine that rotates integrally with the rotary table. Cold water is supplied from the water supply pipe inserted into the mold, and after this cold water is circulated inside the mold and completely cooled, the drain pipe is inserted into the annular opening and drained into the drain machine on the fixed part side. , and is further discharged to the outside of the machine by a drainage means.

〔Example〕

1 to 3 show an embodiment of the Venus cooling device according to the present invention, FIG. 1 is a schematic configuration diagram thereof, FIG. 2 is a plan view of a rotary die casting machine after implementing this, and FIG. FIG. 3 is a sectional view taken along line AA in FIG. 2;

In the figure, the a-taly die casting machine 1 is located at a first station 2. 2nd station 3. The 3rd station is equipped with all 4 stations, of which the 1st
The station 2 includes a table support portion 5a having a circular shape in plan view.
and an injection portion 5b having an isosceles triangular shape in plan view, and a pace platen 5 which is fixed to a foundation on the floor surface. The center of the table support part 5a and the injection part 5b
Tie bars 6 are attached to the two ends of the isosceles triangle base.
．． 7 is fixed with a nut and stands upright, and the tie bar 6
．． A tie bar hole of a cylinder platen 8 formed in an isosceles triangular shape is fitted into the upper end of the tie bar 6.7.
is firmly fixed by a nut 9.

On the upper surface of the table support portion 5a of the pace platen 5, a hollow shaft 10 for rotating the table formed in the shape of an inverted funnel is fixed upright and concentrically with a tie bar 6 therein.
The rotary table indicated by the entire reference numeral 11 has this hollow shaft 10.
It is rotatably supported via upper and lower ball bearings 12 and 13t. This rotary table 11 includes a center frame 14 fitted with ball bearings 12 and 13 and shaped like a regular triangular box when viewed from above, and three sets of opening/closing molds arranged at positions corresponding to each side of the triangle. 7tN-shaped support plates 16A, 16B supported between unit holding parts 15A, 15B, 150 and adjacent mold opening/closing unit holding parts;
The main part is composed of 16C.

1T is a gear that meshes with the motor 17aK [connected pinion 17b] of the pace plate y511, and is fixed to the rotary table 11, and the rotary table 11 is rotated at a predetermined timing by the rotation of the motor according to commands from the control device. It is configured to rotate intermittently by 1/3 rotation.

The second station 3 includes an extrusion frame 18 fixed to the cylinder platen 8 and installed horizontally and having an isosceles triangular shape in plan view, and an extrusion frame 18 fixed to the base platen 5 and installed horizontally. A protruding cylinder frame (not shown) is connected between the cylinders by vertical tie bars.

Reference numeral 19 indicates a mold setup device provided outside the second station 13;
The frame 2G is provided with nine frames 2G extending in the direction and fixed to the floor surface, and on this frame 2G are a number of rollers 21 which are selectively rotated in forward and reverse directions by being driven by a motor through belts, chains, and metals. The mold setup device 19 is arranged in parallel on both sides.
- Mold opening/closing unit holding part 15A (1
The structure of the mold opening/closing unit 22 and its mounting structure will be described below. The mold opening/closing unit 22 is
A mounting base 23 formed in the shape of a rectangular plate is provided, and at the four corners of the mounting base 23, brackets 24 of 24gI each formed in a rectangular tube shape and connected to each other by horizontal members are vertically erected. ing. A guide rod 2 is provided in the inner hole of each bracket 24.
5 is fitted into the mounting base 23 with a length that reaches the length so as to be movable up and down, and the upper end of each guide rod 25 is fitted into a guide hole of the top frame 26 and fixed thereto. and,
A fixed metal plate 27 is attached to the mounting base 23 and the top 7 frame 26.
and movable metal ff128 are respectively attached. 29
is fixed to the mounting base 23@ and stands upright, and has 91 pairs of mold opening/closing cylinders.The piston rods 30 are fixed to the top frame 26 via metal fittings 31', and the piston rods 307 are moved forward and backward by hydraulic pressure. By doing so, the top frame 26 is raised and lowered together with the movable mold 28, and mold clamping and mold opening are performed. The fc type opening/closing unit 22 configured in this way is configured as follows: ff1l19
By the rotation of roller 21, mold opening/closing unit holding part 15A
(15B, 15C), and by contacting the stopper 32, the roller 21 is stopped by the limit switch provided on the mold setup device [19 side] and stopped at the fixed position. At this stop position, a push-up cylinder (not shown) is interposed between the mold opening/closing unit 22 and its holding parts 15A (15B, 15C), and when the mold opening/closing unit 22 stops, this push-up cylinder is activated to mold the mold. The opening/closing unit 22t is configured to be positioned, and to be slightly raised so as to be floated by the pace platen 5.

The mold opening/closing unit 22 supplied to the rotary table 11 in the tightened state moves to the third station 4 and stops as the rotary table 11 rotates 120', and then the piston rod 30 of the mold opening/closing cylinder 2S moves forward. As a result, gold ff127.28 is opened. 33 is gold f
An arm 3 supported by a frame 34 and moved back and forth by a hydraulic cylinder 35 is used for cleaning f127 and 211 and then spraying release agent gold on them.
6t- is provided, and the tip of this arm 36 (7) has a
A spray head 37 is attached. Then, with the hydraulic cylinder 35, the spray head 37t-inner metal plate 27°28
The structure is such that cleaning is performed by blowing out air and application of a mold release agent is performed by blowing out air and mold release agent. 38Fi Money as needed! A conventionally known insert insertion device is used to insert the metal insert into the 27.28. After the work at the third station 4, when the piston a of the mold opening/closing cylinder 29 is moved back, the molds ff127 and 28 are aligned, and the minimum necessary mold clamping force is applied between the two molds 27 and 28. It will be done.

After temporarily clamping the mold in this way, the rotary table 11 is
After rotating by 20 degrees, the mold opening/closing unit 22 stops at the first station 2. The cylinder platen 8 of the first station 2 is provided with a mold clamping cylinder indicated by the reference numeral 39 in FIG. This mold clamping cylinder 39 is equipped with a main ram that moves up and down by introducing pressure oil into the cylinder, and this main ram is equipped with a moving platen 4 shown in FIG.
0 is fixed, and by introducing pressure oil above the main ram, the moving platen 40 descends, and the top frame 26 descends against the hydraulic pressure of the mold opening/closing cylinder 29 and the push-up cylinder, creating a large mold clamping force. Mold 27.2
It is configured to be added to 8. At this time, the push-up cylinder is compressed and the mounting base 23 is seated on the horizontal contact surface of the base platen 5, so that the strong base platen 5 can sufficiently withstand the large mold clamping force. A conventionally well-known injection device (
(not shown) is suspended from the base platen 5, and outside the rotary table 11 is a melting furnace 41 that stores molten metal, and an automatic water heater that pumps up and transports all of the molten metal. 42 are arranged. And automatic hot water supply &f
The molten metal supplied into the injection sleeve of the injection device at 142 is transferred to the mold 2 by the elevation of the plunger by the injection cylinder.
7.28 is injected into the cavity, and is assimilated and cooled by the cooling piping inside the mold, which will be described later.

During cooling, the rotary table 11 rotates 120', and the mold opening/closing unit 22, which is held in a temporary mold clamping state during cooling, stops at the second station 3 and cooling ends. The piston rod 30 of the mold opening/closing cylinder 29 moves forward to perform base opening. The second station 3 is provided with a protruding cylinder (not shown) below the mold opening/closing unit 22 and an extruding cylinder 43 above, and the piston rod of the protruding cylinder simultaneously starts to rise when the movable Venus 28 to open the mold starts rising. is inserted into the injection hole of the mounting base 23 and the fixed Venus 27 and is ejected, so that the product inside the cavity is moved from the movable Venus 2.
It is held on the 8 side and rises. When the lift is finished, the piston rod of the extrusion cylinder 43 descends and projects downward from the product movable metal ff128 via an extrusion plate and an extrusion pin (not shown). The second station 3 is equipped with a product take-out device 4 that receives all the protruded products, cools them with water, and discharges them onto the floor or the like.
4 is provided. This broken product removal device [44] includes a horseshoe-shaped tray 46 that is driven by a hydraulic cylinder 45 and moves back and forth between the illustrated position and the center position of the mold 27, 28, and a hydraulic cylinder 47 that moves back and forth in a direction perpendicular to the tray 46. When the tray 46 pushed out from the mold 28 and received at the exhibition forward position retreats to the position shown, the tray 4
The puller 48, which was at the forward limit position exceeding 6, is moved back and pulled out onto the product T-basket 49. A link mechanism (not shown) is attached to the car 49, and when the link mechanism is moved by the drive device, the car 49
While holding the product, the product is cooled by moving back and forth between the illustrated position and the cold water tank, and is configured so that the product slides completely on the cooled product ore chute and is discharged to the floor, etc. . The entire product take-out device 44 is configured to move forward and backward with respect to the Venus setup device 19 on the frame 50, and is retracted from the company setup device 19 when the mold opening/closing unit 22 is taken in and out. The mold opening/closing unit 22/ri in the mold open state is moved by the rotation of the rotary table 110 and is moved to the third position.
It stops at a station and the cleaning, spraying, etc. described above are performed.

Next, the cooling piping inside the mold will be explained. A water supply gutter 51 formed in an annular shape with a rectangular cross section is fixed to the upper end surface of the central cylindrical portion of the rotary table 11, and is configured to rotate together with the rotary table 11. The annular opening 51a is opened upward. A water supply pipe 52 connected to an external water supply source is inserted into this annular opening 51a, and cold water is constantly supplied during the casting operation. On the other hand, cooling piping 53 is installed in the molds 27 and 28, and a cooling water pump 54 is mounted on the support plate 16B of the rotary table 11. The outlet refers to the pipe 55 between the bottom of the water supply machine 51 and the cooling pipe 53.
．． 56 and connected by h. 57 is an annular drainage gutter with a rectangular cross section, and is fixed to the bottom part 72 of the hollow shaft 100, which is the non-rotating part, and has an annular opening 57a facing upward on its upper end surface. It is opened. A pipe 58 connected to the outlet of the cooling pipe 53 is inserted into the annular opening 57a, and an over-7o pipe 59 connected to the upper end of the water supply machine 51 is inserted into the annular opening 57a. is being involved. Furthermore, a drain pipe 61 equipped with a drain bong is connected to the bottom of the drain gutter 57, and when both pumps 54 and 6tO1 are started, the cold water supplied from the water supply source to the water supply machine 51 through the water supply pipe 52 is 55 , 56 , cooling pipe 53 , pipe 58 passing through drainage gutter 5
The molds 27 and 2a are cooled by circulating toward T, and the cooled water discharged into the drain gutter 5T is discharged to the outside of the machine by the drain pump 60.

The water that overflowed in the primary water supply machine 51 is
It is discharged into the drainage gutter 57 through the a-pipe 59t-. The water in the drain gutter 5T is discharged to the outside of the machine via a drain pipe 61'fr. In addition, in this example, float 62t - drainage gutter 5
A sensor 63 is attached to the water surface of the drain m57 and electrically connected to the drain pump 6o.When the water level in the drain m57 exceeds a predetermined water level in the evening, the float 62 rotates and the sensor 63t- The drain pump 60 is operated via the drain pump 60 to drain water.

The mold opening/closing unit 22 of the casting operation t-1 of the a-Tari die casting machine which has been carried out as described above will be explained step by step. After the entire product removal gIt, 44 is evacuated from the Venus setup device 19, m in the mold clamping state is removed.
The opening/closing unit 22 is prepared by being placed on the rollers 21J, and the motor is started to rotate the rollers 21 to move the mold opening/closing unit 22t forward.

At this time, the rotary table 14 is
Since the center of A (18B, 18C) is positioned on the center line Ll and stopped, the forward open/close two knits 22 are
The holding parts 18A (18B, 18C) come into contact with the stopper 32.
), is positioned by a push-up cylinder, and is pushed up to float above the horizontal contact surface of the pace platen 5.

Therefore, when the piston rod 30 of the mold opening/closing cylinder 29 is raised, the top frame 26 is raised and the mold opening/closing cylinder 29 is raised.
, 28 are in the mold open state. After opening, the rotary table 11 rotates 120 degrees, the mold is opened, and the ninth base opening/closing unit 22 is opened.
Stop at station 4.

Then, the spray head 3T of the mold spray device 33 is advanced to the center of the gold ff127.28, and all of the air and the release agent are jetted out to apply the type III agent to the gold star 27.28.

After the spray head 31 is removed, the piston rod 30r of the mold opening/closing cylinder 29 is moved back and the top frame 26t is lowered, and the molds 2T and 28 are all aligned. A maximum mold clamping force is applied.

When the pattern matching is completed, the rotary teniple 11 rotates 1200 times, the pattern matching is completed, and the sentence pattern opening/closing unit 22 stops at the first station 20. Therefore, when pressure oil is introduced into the mold clamping cylinder 39, the moving latin 40 descends, pushing down the top frame 2δ against the hydraulic pressure of the mold opening/closing cylinder 29 and the hydraulic pressure of the push-up cylinder, and further pushing down the entire mold opening/closing unit 22. As the metal is pressed down, a strong mold clamping force acts on the molds 27 and 28. At this time, the mounting base 23 is seated on the contact surface of the base platen 50, and the large mold clamping force is applied by the strong pace platen 5. It's bearable enough. During mold clamping, the automatic hot water supply device 42 injects molten metal into the injection sleeve of the tilted injection cylinder, and the full-thickness injection cylinder stands up and the injection sleeve connects to the mounting base 23 and the fixed mold 27. After being inserted into the injection hole, the molten metal is injected into the cavity of the mold 27.2B.

At this time, since the cooling water pump 54 is rotating,
Cold water from the water supply source is supplied into the water supply machine 51 through the water supply pipe 52, passes through the pipe 55.5B and the cooling pipe 53, and on its way to the drain gutter 5T cools the mold 27.2B and melts the molten metal 't-.
Assimilate, cool. When the water in the drain gutter 5γ reaches a predetermined amount, the 7cI-Toro 2 rotates and the electric signal from the sensor 63 activates the drain pump 60, and the water in the drain gutter 5T is drained until it reaches a predetermined amount or less. Thereafter, the drain pump 60 is operated intermittently depending on the amount of water.

During the cooling of the molds 27 and 28, the rotary table 11
The mold opening/closing unit 22, which rotates by .degree. and holds the molds 27 and 28t during cooling, is located at the second station 3 and stopped, after which the cooling of the gold ff127, 28 is continued. In this case, during cooling, the rotary table 11 rotates and the water supply machine 5
1, the cooling water pump 54, the pipes 55, 56, 58, etc. all rotate, but the water supply pipe 52 is inserted into the annular opening 51a, and the drain pipe 58 is inserted into the annular opening 57a. Even when the rotary table 11 rotates, cooling of the molds 27 and 2B is not disturbed.

When the molds 27, 2B have finished cooling, the piston rod 30 of the mold opening/closing cylinder 29 moves forward and the top frame 26 rises, and at the same time the piston rod 30 of the protruding cylinder moves forward, so that the solidified and cooled leather product is transferred to the fixed metal. It is projected from the mold 2T and is held in the cavity of the movable metal ff12B which rises together with the top frame 26 and rises. When the top frame 2B finishes rising, the tray 46 of the product take-out device 44 moves forward between the molds 27 and 28, and at the same time the piston rod of the extrusion cylinder 43 moves forward to push out the product downward, so that the extruded leather product is The receiver is stopped by a receiver tray 46. When the tray that received the product moves back, the puller 48 pulls out the product onto the heel 49, and the product is placed on the heel 4.
9 is cooled by reciprocating to and from the cold water tank by the link mechanism, and then slides on the chute and is discharged and accumulated on the floor or the like. This eye and the mold open state ＼Part 3
Heading to Station 4 can be done as described above.

The above has been explained step by step for the 11 sets of mold opening/closing units 22 in the casting operation, but when the other mold opening/closing unit holding parts 18B and 18C of the rotary table 11 stop at the second station 3, the mold opening/closing unit 22t- A normal casting cycle is entered by supplying the liquid to this station and causing each station 2, 3.4 to perform the same operation as described above. Also, during normal casting work, if you want to take out a set of gold ff127, 28vl for maintenance etc., when the mold opening/closing unit 22 with the target Venus attached is located at the second station 3, remove it from the second station 3. It is only necessary to take out the setup device [19] and supply all replacement mold opening/closing units 22 after one rotation of the rotary table 11. During this time, the other two mold opening/closing units cannot be continued for normal casting work. As a result, production of molds other than the ones to be replaced will not be reduced. Furthermore, if all 193 sets of mold opening/closing units 22t are replaced due to a change in product specifications, the mold opening/closing units 22 must be taken out three times at the second station 3 and the mold removed three times each time the rotary table 11 rotates 1200 times. If the opening/closing unit 22 is installed and the work at other stations 2.4 is continued during this time, production will not be reduced much due to mold replacement.

In this embodiment, an example in which three work stations t-3 are provided is shown, but the number may be two, or four or more.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in the metal cooling device of the A-Tari die casting machine, a plurality of thermal switching units 2 are mounted and rotated integrally with the rotary table that rotates intermittently. A water supply machine is provided, and a water supply pipe from the water supply source of the non-rotating part is inserted into the annular opening that opens upward, and the bottom of the water supply machine is connected to the inlet of the cooling pipe of the mold for circulation of all pumps. In addition to connecting with piping, a drainage gutter is provided on the non-rotating part side, and a drainage pipe from the outlet of the cooling piping of the mold is inserted into the annular opening that opens upward, and a membrane is installed over the drainage means for the drainage gutter. As a result, the water supply pipe on the non-rotating part side is inserted into the annular opening of the water supply machine that rotates once, and cooling water is supplied to the water supply machine. Since water is drained into the drainage gutter on the non-rotating part side that is inserted into the opening, the simple configuration allows the rotary table to rotate freely during cooling of the mold, making it possible to centralize rotary die-casting machines. This greatly improves productivity.

[Brief explanation of drawings]

Figures m1 to 3 show examples of cooling piping in the mold of an a-tary die-casting machine according to the present invention. The plan view, FIG. 3, is an AA@ side view of FIG. 2. 1e...Rotary die casting machine, 2...1st
Station, 3...Φ・Second station, 4・War・
Working 3rd station, 11...Rotary table, 15
A, 15B, 15C... tear open/close unit holding part, 2
2...Mold opening/closing two knits, 27...Fixed mold, 2
8... e movable mold, 51... water supply machine, 51a ・
... Annular opening, 52 ... Water supply pipe, 53 ...
Cooling piping, 54...Cooling water pump, 55.56...
...Piping, 57...-0 drain gutter, 57a φ...annular opening, 58...drain pipe, 60...drain pump, 61e-...drain pipe.

Claims (1)

[Claims] A plurality of mold opening/closing units, each holding a pair of molds, rotates and intermittently stops a rotary table disposed at circumferentially divided positions on the outer periphery, so that each mold opening/closing unit can move to a position corresponding to each mold opening/closing unit at the stopped position. In a rotary die-casting machine configured so that work in different processes can be performed at the same time at each work station provided, an annular opening concentric with the rotary table opens upward and into which a water supply pipe from a non-rotating side water supply source is inserted. A water supply gutter is fixed to the rotary table side and rotates integrally with the water supply gutter, and the bottom of this water supply gutter is connected to the inlet of the cooling piping inside the mold, fixed to the rotary table side, and the pump is connected in the middle. and a drainage pipe fixed to the non-rotating part side, which has an annular opening that opens upward and is concentric with the rotary table into which the drainage pipe from the outlet of the cooling piping inside the mold is inserted. A mold cooling device for a rotary die casting machine, comprising a gutter and a drainage means connected to the gutter.