JPH0726051U - Nozzle pressing device for hot chamber type die casting machine - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The nozzle pressing mechanism and the pressing force adjusting mechanism are integrated into a compact size and the pressing force can be adjusted easily.
Furthermore, a nozzle pressing device for a hot chamber type die casting machine, which is improved in maintainability such as nozzle replacement, is provided. [Structure] The pressing means of the nozzle 32 is constituted by a combination of the hydraulic means 20 and the spring means 30. Rods 24 are vertically fixed to the left and right of the fixed die plate 10, and pistons 25 are formed in the middle of the rods. The piston 25 is fitted into the cylinder 26 provided at the end portion of the injection frame 23 via a piston ring, and both ends thereof are sealed with lids 26b to form a hydraulic cylinder, and the injection frame 23 is moved by hydraulic pressure. Spring means configured to exert a force on the rod is provided on the cylinder end surface side of the injection frame and the other end side of the rod.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a nozzle pressing device for a hot chamber type die casting machine.

[0002]

[Prior art]

 In the hot chamber type die casting machine, the nozzle can be exchanged so that maintenance of the nozzle and die replacement can be performed easily.

Generally, when the die casting machine is stopped, the nozzle cools and shrinks, so that the residual hot water enters between the nozzle and the mold connecting portion and solidifies and adheres as a slag. Cause a leak. Therefore, slag is removed by rotating the nozzle by manual means called lapping. Conventionally, since the nozzle pressing mechanism and the nozzle pressing force adjusting mechanism for removing the slag are arranged independently and in parallel, a large space is required and the nozzle pressing device has a large stroke structure. It wasn't.

[0004]

[Problems to be solved by the device]

 According to the conventional technology, there are the following technical problems.

In order to save space, it is necessary to integrate the pressing mechanism for pressing the nozzle and the adjusting mechanism of the pressing force of the nozzle to adjust the pressing force of the nozzle.

Further, since the conventional nozzle pressing device cannot take a large stroke, there is some difficulty in workability for changing the mold and attaching and detaching the nozzle.

The nozzle pressing device of the present invention has been made in view of the conventional problems, and a pressing mechanism for pressing the nozzle and an adjusting mechanism that adjusts the pressing force of the nozzle by a spring force are integrated. We provide a nozzle pressing device for hot chamber type die casting machines that is compact and makes it easy to adjust the pressing force of the nozzle, and that allows a large retract stroke for nozzle replacement, mold replacement, and nozzle maintenance. To do.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the nozzle pressing device of the hot chamber type die casting machine of the present invention has the following means.

An inverted U-shaped injection frame is movably supported by a base with respect to a fixed die plate, an injection pump is supported by the injection frame, and an injection hole of the injection pump and an injection hole of a mold are provided. In a nozzle pressing device of a hot chamber type die casting machine, in which a nozzle is detachably attached between the nozzles and the molten metal is supplied to the mold through the nozzle, one end is supported by a fixed die plate and a piston is provided in the middle part. A pair of formed rods, a cylinder fixed to two right and left inverted U-shaped portions of the injection frame, the pistons fitted into the cylinders respectively, and a cylinder end face sealed with a lid. Nozzle pressing means constituted by combining a cylinder end surface of the injection frame and the other end side of the rod with spring means for exerting a force on the rod, and the hydraulic cylinder. A hydraulic device for supplying and controlling pressure oil to the cylinder and a spacer block sandwiched between the spring means and the lid on the end surface of the cylinder.

[0010]

[Action]

 The operation of the device of the present invention constructed as above will be described.

For maintenance of the nozzle and replacement of the mold, after stopping the hot chamber type die casting machine, the nut of the nozzle pressing means is loosened to make the pressing force by the spring zero. Next, the spacer block is removed. Then, the hydraulic device supplies pressure oil to the hydraulic cylinder used as the nozzle pressing means, retracts the injection frame, and performs nozzle replacement work or mold replacement work. After the work is completed, move the injection frame forward, and when the nozzle contacts the mold, stop the supply of pressure oil to the hydraulic cylinder and install the spacer block. Then, tighten the nut to the specified pressing force, insert a spanner into the notch in the nozzle, and oscillate to wrap to remove the slag. After that, pressure oil is supplied to the hydraulic cylinder of the pressing means, and the pressing force of the nozzle is returned to the state at the time of casting by the spring means and the hydraulic means, and casting is started.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially enlarged sectional view of an injection part of a hot chamber type die casting machine, FIG. 2 is a sectional view showing an AA cross section of FIG. 1, and FIG. 3 is a sectional view showing a BB cross section in FIG. It is a figure.

In FIG. 1, a pair of molds 1 composed of a movable side and a fixed side are fixed to a movable die plate 5 and a fixed die plate 10, respectively, and the fixed side molds 1 and 1 are formed on a mating surface. An injection hole 2 communicating with the formed cavity 3 is provided. An injection pump 40 is fixed to the injection frame 23, and the lower portion of the injection pump 40 is immersed in a furnace 41 that is provided near the fixed die plate 10 and stores molten metal.

In FIGS. 1, 2, and 3, the inverted U-shaped injection frame 23 is supported by a pair of bases 28 that guide the outside of the lower end portion, and is movable in the same direction as the moving die plate 5. The rod 21 fixed to the upper part of the fixed die plate 10 is an axial auxiliary guide for preventing the injection frame 23 from swinging through the guide hole 22a of the bracket 22.

The nozzle pressing means for pressing the nozzle 32 is constituted by a combination of the hydraulic means 20 and the spring means 30. That is, the rods 24 are vertically fixed at two places on the left and right sides of the fixed die plate 10, and the pistons 25 are formed at the intermediate portions of the rods 24. The cylinder 26a provided at the U-shaped end of the injection frame 23 is fitted with the sealed piston 25 through the piston ring 25a, and the both ends are sealed by the sealed lids 26b to form the hydraulic cylinder 26. The injection frame 23 was moved by a device (not shown). Therefore, when pressing the nozzle 32, if pressure oil is supplied to the Y chamber, the nozzle 32 detachably mounted between the injection hole 42 of the injection pump 40 and the injection hole 2 of the mold 1 is pressurized, When removing the nozzle 32, after removing the spacer block 27, pressure oil is supplied to the X chamber to release the pressing force, and the nozzle 32 is removed.

Further, spring means 30 configured to exert a force on the rod 24 is provided on the end face side of the cylinder 26 a of the injection frame 23 and the other end side of the rod 24. The spring means 30 includes a bolt 35 fixed to the shaft center of the shaft end of the rod 24, a disc spring 31 loosely engaged with the shaft end, and a pair of contact plates fitted to the shaft end so as to sandwich the disc spring 31. 32 and a nut 33 that is screwed onto the bolt 35 and abuts on the spring retainer 34.

As shown in FIG. 3, a spacer block 27 having a horseshoe-shaped cross section, which is sandwiched between the cover 26b on the cylinder end surface and the abutting plate 32, is detachably provided, and the spacer block 27 is removed. The amount of movement of 23 can be made large.

The operation of the device of the present invention will be described below.

When performing maintenance of the nozzle 32 and replacement of the mold, first, the hot chamber type die casting machine is stopped, the nut 33 is loosened, and the tightening force by the disc spring 31 used as the spring means 30 is made zero. To do. Next, the spacer block 27 is removed. Then, the direction switching valve (not shown) of the hydraulic device is switched to supply pressure oil to the X chamber of the hydraulic cylinder 26 used as the nozzle pressing means, retract the injection frame 23, and inject the injection hole 42 of the injection pump 40. The nozzle 32 is removed or the mold 1 is replaced between the mold 1 and the injection hole 2 of the mold 1. After the work is completed, the direction switching valve (not shown) is switched to supply the pressure oil to the Y chamber of the hydraulic cylinder 26, advance the injection frame 23, and when the nozzle 32 comes into contact with the mold 1, supply it to the hydraulic cylinder 26. The supply of pressure oil is cut off, and the spacer block 27 is attached. Further, the nut 33 is tightened to a predetermined pressing force, a spanner is inserted into the notch of the nozzle 32, and rocked to perform wrapping to remove the slag. Then, pressure oil is supplied to the Y chamber of the hydraulic cylinder 26 of the pressing means, and the pressing force of the nozzle 32 is returned to the pressing pressure state at the time of casting by the spring means 30 and the hydraulic means 20 to start casting.

[0021]

[Effect of device]

 Since the nozzle pressing device of the present invention integrates the pressing mechanism for pressing the nozzle and the fine adjustment mechanism that adjusts the pressing force of the nozzle by the spring force, it can be configured more compactly than the conventional one and the nozzle can be constructed. The pressing force of can be finely adjusted.

By attaching and detaching the spacer block, a large retreat stroke can be taken for nozzle replacement, mold replacement, and nozzle maintenance, so that leakage of molten metal can be prevented and mold replacement is easy.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of an injection part of a hot chamber type die casting machine of the present invention.

FIG. 2 is a sectional view showing an AA section of FIG.

FIG. 3 is a sectional view showing a BB section in FIG.

[Explanation of symbols]

 1 Mold 2 Injection Hole 10 Fixed Die Plate 20 Hydraulic Means 23 Injection Frame 24 Rod 25 Piston 30 Spring Means 31 Furnace 32 Nozzle 40 Injection Pump 41 Furnace

Claims (1)

[Scope of utility model registration request] 1. An inverted U-shaped injection frame is movably supported by a fixed die plate, an injection pump is fixed to the injection frame, and a nozzle is provided between an injection hole of the injection pump and an injection hole of a mold. In a nozzle pressing device of a hot chamber type die casting machine configured so that the molten metal is supplied to the mold through the nozzle, a pair of rods having one end supported by a fixed die plate and a piston formed in the middle part. And a hydraulic cylinder constituted by fixing cylinders at two positions on the left and right of the inverted U-shape of the injection frame, fitting pistons of the rods to the cylinders respectively, and sealing the cylinder end surface with a lid, and the cylinder end surface of the injection frame. Nozzle pressing means configured by combining spring means for exerting a force on the rod on the other end side of the rod and pressure oil to the hydraulic cylinder. Hydraulic device and the spring means and the nozzle pressing device of a hot chamber type die casting machine, wherein the spacer blocks sandwiched, that constituted by between the lid of the cylinder end surface for controlling.