JPH0239642Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot chamber die casting machine.

Conventionally, this type of hot chamber die-casting machine has a hot chamber die-casting machine as shown in Figure 1.
A die-casting machine main body 1, a fixed mold 3 that can move on rails 2, 2 provided on the upper part of the die-casting machine main body 1, a movable mold 4, and an extrusion plate 5.
etc., and the mold unit 6 fixed to the die casting machine main body 1.
It consists of a hot water pouring device 7 that supplies molten metal to the mold unit 6, and a moving device 8 that moves the mold unit 6. The moving device 8 has one end pivoted to the rear end of the mold unit 6, and the other end a link 10 which is pivotally supported on an arm 9 which is attached to the die casting machine main body 1 so that its position can be adjusted, and whose substantially central portion is rotatably supported;
The link 10 was composed of a hydraulic cylinder 12 that rotates a substantially central portion thereof via a rod 11.

Therefore, the structure of the moving device 11 is complicated and the cost is high, and the amount of movement (pushing force) changes and is not constant due to wear of the pivot pins and the like.

In view of the above-mentioned drawbacks of the conventional machines, the present invention has been developed to create a hot chamber die-casting machine that can simplify the structure of the moving device and keep the amount of movement of the mold unit, that is, the pressure applied to the nozzle, constant at all times. There is something to be gained.

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in FIGS. 2 to 4.

In the embodiment shown in FIGS. 2 to 4, 15 is a hot chamber die casting machine body. Reference numeral 16 denotes a hot water pouring device for pouring molten metal into a cavity provided in one upper part of the die casting machine main body 15. Reference numeral 17 denotes a mold unit that moves on rails 18, 18 provided on the upper part of the die casting machine main body 15, and this mold unit 17 has a plurality of rollers 19, 19 engaged with the rails 18, 18. A fixed mold mounting plate 23 of the frame 20 is formed with a runner 22 communicating with the nozzle 21 of the hot water pouring device 16.
a fixed mold 24 fixed to the fixed mold 24;
A movable mold 25 that can reciprocate within the frame 20 is clamped, and a cavity 26 formed by the fixed mold 24 and the movable mold 25 extrudes the cast product into the frame 20. an extrusion plate 28 having a plurality of extrusion pins 27; the movable mold 25 and the extrusion plate 28 attached to the mounting plate 29 of the frame 20;
and a first hydraulic cylinder 31 having a rod 30 for driving the hydraulic cylinder.

32 is a mold unit moving device that moves the mold unit 17 away from the melt pouring device 16 every time molten metal is poured into the mold of the mold unit 17;
This mold unit moving device 32 consists of a pair of pivot pins 33, 33 fixed to both sides of the die casting machine main body 15 on the side of the hot water pouring device 16, and both sides of the fixed mold mounting plate 23 of the mold unit 17. A pair of pins 34, 34 fixed to the surface, one end rotatably supported by the pivot pins 33, 33, respectively, and a recess 35 into which the pins 34, 34 enter and are pivotally supported at the other end, A pair of arms 36, 36 each having a number 35 formed thereon, and a pair of arms 36, 36, which are rotatably attached to both sides of the die casting machine main body 15, and the tips of the rods 37, 37 are respectively formed on the arms 36, 35.
36, and a pair of hydraulic cylinders 39, 39 pivotally supported by pins 38, 38, and a position-adjustable stopper mechanism 40 fixed to both sides of the die casting machine main body 15. .

Reference numeral 41 indicates that the mold unit 17 is connected to the hot water pouring device 16.
The arm 3 is pressed with a predetermined pressure.
This is a contact sensing limit switch that detects the position of 6 and operates the hot water pouring device.

In the above configuration, the first hydraulic cylinder 31
is activated to cause the rod 30 of the first hydraulic cylinder 31 to protrude and move the movable mold 25 to the fixed mold 24.
direction, and the movable mold 25 and the fixed mold 24 are clamped. After that, the mold unit moving device 32 is operated to move the fixed mold 2 of the mold unit 17.
The runner 22 of No. 4 and the nozzle 21 of the hot water pouring device 16 communicate with each other while being pressed at a predetermined pressure. That is, the rod 3 of the pair of hydraulic cylinders 39, 39
7 and 37 protrude, respectively, and the arms 36 and 36 are rotated in the direction of the arrow about the pivot pins 33 and 33 as fulcrums. For this reason, the mold unit 17 has arms 36,
The nozzle 21 moves in the direction of the hot water pouring device 16 in response to the rotation of the
Press it with the specified pressure. When the runner 22 of the fixed mold 24 is completely communicated with the nozzle 21 (pressed at a predetermined pressure), the adhesion sensing limit switch 41 is activated by the arm 36, so the hot water pouring device 16 is activated. Then, the molten metal is forced into the cavity 26 through the nozzle 21 and the runner 22.

Thereafter, the mold unit moving device 32 is operated to move the mold unit 17 away from the hot water pouring device 16. That is, a pair of hydraulic cylinders 39, 39
Since the rods 37 and 37 of the arm 3 are retracted, the arm 3
6 and 36 rotate in the opposite direction of the arrow, and the mold unit 1
7 in the same direction. For this reason, fixed mold 2
The runner 22 of No. 4 and the nozzle 21 of the hot water pouring device 16 are separated from each other. Next, when the first hydraulic cylinder 31 is operated, the rod 3 of the first hydraulic cylinder 31
Since 0 contracts, the movable mold 25 is replaced by the fixed mold 24.
It's more out of place. After that, the first hydraulic cylinder 3
1 operates in the direction of ejecting the rod 30, first, the push-out plate 28 moves and removes the product attached to the movable mold 25 by the push-out pin 27, and then the movable mold 25 is moved. Then, the mold is clamped with the fixed mold 24. In this mold-clamped state, the first
The hydraulic cylinder 31 operates to push out the push-out pin 2.
7 retreats to a position where it is not located inside the cavity 26, and preparation for pouring is completed.

As is clear from the above description, the present invention has the following effects.

(1) Since the mold unit can be moved directly by the rod of the hydraulic cylinder, there is no need for a link mechanism as in the past, and costs can be reduced.

(2) Since the mold unit can be moved directly with the rod of the hydraulic cylinder and constantly pressed against the hot water pouring device with a constant hydraulic pressure, the mold cannot be damaged due to wear of pins, etc., unlike those using conventional link mechanisms. The amount of movement of the unit changes, and the contact pressure between the fixed mold runner and the nozzle of the hot water pouring device decreases.
It is possible to prevent molten metal from leaking.

(3) The mold unit can be removed from the pouring device after each casting to take out the product. Therefore, nozzle clogging can be efficiently prevented.

(4) Hydraulic cylinders are provided on both sides of the die-casting machine body, and arms that are rotated by the rods of the hydraulic cylinders are also provided on both sides of the die-casting machine body, so it can easily be used with conventional die-casting machines. can be installed. Therefore, modification costs can be reduced.

(5) Since the arm can be operated on the side of the hot water pouring device of the mold unit, it is possible to reliably communicate the runner of the fixed mold of the mold unit with the nozzle of the hot water pouring device. Therefore, hot water leakage can be reliably prevented.

(6) Since the mold unit is configured to move on a rail provided at the top of the die-casting machine body, the support mechanism for the mold unit is simple.
Moreover, the mold unit can be easily slid in the same direction as the nozzle of the hot water pouring device. Therefore, the mold unit moving mechanism has a simple structure, can be manufactured at low cost, and can be easily modified and installed in an existing die-casting machine. Also,
The connection between the nozzle and the runner can be ensured.

(7) A U-shaped recess is formed at one end of the pair of arms, and a pair of pins protruding from both sides of the mold unit on the hot water pouring device side are inserted loosely into the recess. Therefore, the mold unit and the pair of arms can be connected simply by positioning a pin in the U-shaped recess, which can be done easily and in a short time.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one conventional embodiment, Fig. 2 is an explanatory diagram showing an embodiment of the present invention, Fig. 3 is a diagram showing the operating state, and Fig. 4 is an enlarged view of part A of Fig. 2. It is a diagram. 15... Hot chamber die casting machine main body, 16... Hot water pouring device, 17... Mold unit, 18... Rail, 19... Roller, 20...
Frame, 21... Nozzle, 22... Runway, 23
...Fixed mold mounting plate, 24...Fixed mold, 25...
...Movable mold, 26... Cavity, 27... Push-out pin, 28... Push-out plate, 29... Mounting plate, 30... Rod, 31... First hydraulic cylinder, 32... Mold unit moving device , 33... Pivot pin, 34... Pin, 35... Recess, 36...
Arm, 37...rod, 38...pin, 39...
...Hydraulic cylinder, 40...Stopper mechanism, 4
1...Contact sensing limit switch.

Claims (1)

[Scope of utility model registration request] Hot chamber die casting machine body,
A mold unit equipped with fixed molds, movable molds, etc. that can move on rails provided on the upper part of the die-casting machine main body, and a runner for the fixed mold of the mold unit provided on the die-casting machine main body. a hot metal pouring device for pouring molten metal into the mold unit; a pair of pins protruding from both sides of the mold unit on the side of the hot metal pouring device; the other end rotatably pivoted to the die casting machine body; A pair of arms each having a U-shaped recess into which the pair of pins are loosely inserted, and a rod whose tip end is pivotally supported approximately at the center of the pair of arms, each of which is pivotally supported on the die-casting machine main body. A hot chamber die casting machine comprising: a hydraulic cylinder that separates the mold unit from the melt pouring device each time molten metal is poured into the mold of the mold unit.