JPH0751830A - Device for correcting thermal deformation of injection sleeve - Google Patents

Abstract

PURPOSE:To prevent the deformation of an injection sleeve and to contrive the smooth driving by controlling cooling fluid according as the displacement while measuring the displacement of the injection sleeve in a horizontal type die casting machine. CONSTITUTION:The displacement in the condition of no cooling of the injection sleeve 1 in the horizontal type die casting machine is measured to decide this reference position. At the time of supplying molten metal 5 into the injection sleeve 1 from a pouring hole, the injection sleeve 1 and a cooling sleeve 7 are deformed as curving state. Therefore, a displacement transmitting member 16 and a joint 18 supported with a leaf spring 20 are shifted upward, and the displacement crossed at the right angle of the injection sleeve 1 is measured with a potentiometer 23 following to this displacement. The cooling fluid from a cooling fluid supplying source 26 is flowed into the displacement transmitting member 16, pipe 11 and cooling passage 14 while controlling through a flow rate control valve 27 to execute the cooling the injection sleeve 1. Then, the displacement of the potentiometer 23 is corrected in a prescribed range so as to become the reference position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal deformation correction device for an injection sleeve of a horizontal die casting machine.

[0002]

2. Description of the Related Art An injection sleeve of a horizontal die casting machine is transformed into a banana shape as shown by a dotted line in FIG. 1 due to a temperature difference between a contact surface and a non-contact surface of molten metal supplied from a pouring port,
As a result, galling occurs on the inner surface of the injection sleeve by the plunger, it is difficult to inject the molten metal into the mold at a predetermined speed, and the molten metal sometimes scatters from the gap.

[0003]

According to the prior art, there were the following technical problems.

Conventionally, since there is no means for measuring the deformation of the injection sleeve, it is not possible to grasp how the injection sleeve is deformed, so it is not possible to provide a means for correcting it and the die casting machine operates smoothly. Was difficult.

The present invention has been made in view of the prior art, and prevents deformation of the injection sleeve while measuring the displacement of the injection sleeve of the horizontal die casting machine to realize smooth operation of the die casting machine. With the goal.

[0006]

In order to solve the above problems, the thermal deformation correction device for an injection sleeve of the present invention injects the molten metal supplied from the pouring port into the injection sleeve into the mold by the plunger. In the horizontal die casting machine configured to perform, a cooling flow path for guiding a cooling fluid provided along the lower surface of the injection sleeve in the axial direction, an elastic member supported at a fixed position such as a die plate, From the displacement transmitting member connected to the cooling fluid supply source, the displacement transmitting member which is connected to the cooling fluid passage and extends in the direction orthogonal to the injection sleeve axis and which is supported by the elastic member and allows the cooling fluid to pass therethrough. Cooling fluid supply means for supplying a cooling fluid to the cooling channel, measuring means for measuring the displacement of the injection sleeve following the displacement transmitting member, and controlling the flow rate of the cooling fluid based on the signal of the measuring means. You By the flow control means, the injection Sri - configured to correct the displacement of the probe within a predetermined range.

[0007]

The operation of the thermal deformation correction device for the injection sleeve of the present invention constructed as described above will be described below.

First, an injection sleeve of a horizontal die casting machine.
The displacement of the injection sleeve in the orthogonal direction in the state in which the valve is not cooled is measured by the measuring means and set as the reference position. When the molten metal is supplied from the pouring port to the injection sleeve, the displacement transmitting member moves upward. Therefore, the cooling fluid is supplied from the cooling fluid supply source to the displacement transmitting member and the cooling passage to cool the injection sleeve. . The displacement of the displacement transmitting member is measured by the measuring means, and the displacement signal is controlled within a predetermined range so that the displacement of the measuring means becomes the previous reference position while controlling the flow rate of the cooling fluid through the flow control valve. Correction, and the thermal deformation of the injection sleeve is corrected.

[0009]

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

FIG. 1 shows an injection sleeve of a horizontal die casting machine.
The partial cross section figure of the thermal deformation correction apparatus of a bu is shown.

A ring-shaped bush 13 is fitted under the central portion of the fixed die plate 21, and a cylindrical injection sleeve for injecting molten metal into the mold 2 by the plunger 3 inside the bush 13. 1 is fitted. A cooling sleeve 7 having an arcuate cross section is closely attached and fixed to the lower surface of the injection sleeve 1 in the axial direction along the injection sleeve 1 via an O-ring 6. The cooling sleeve 7 is provided with cooling holes 10 which are perforated evenly on the circumference, and a cooling hole 12 is further drilled on an extension of the bush 13 to guide a cooling fluid.
Has been extended. A pipe 11 for guiding a cooling fluid is inserted into the cooling hole 10 with a gap, and the gap serves as a cooling flow path 14. A joint 17 joined to the pipe 11 is screwed to the mouth of the cooling hole 10 so that the displacement transmitting member 16 can be electrically connected to the pipe 11 via the joint 17 and extends downward orthogonal to the axis of the injection sleeve 1. It is arranged. Also, fixed die plate 2
A frame spring 20 which is an elastic member is supported by a frame 22 extending from a fixed position such as 1. A joint 18 is provided at the tip of the leaf spring 20, and a motor drive type flow control valve 27 is provided.
Is connected to the cooling fluid supply source 29 via. A potentiometer 23 as a measuring means for measuring the displacement of the injection sleeve 1 is provided via a joint 18 provided at the lower end of the displacement transmitting member 16. The cooling fluid supply means controls the flow rate of the cooling fluid, that is, tap water from the cooling fluid supply source 29 by the motor drive type flow control valve 27 based on the injection sleeve position signal, and the pipe 11 and the displacement transmitting member 16
And is supplied to the cooling sleeve 7. A discharge hole 15 is formed near the mouth of the cooling hole 10 of the cooling sleeve 7 so that the cooling fluid is discharged to the outside through the hose 30.

Next, the operation of the thermal deformation correction device for the injection sleeve of the present invention will be described below. First, the displacement of the injection sleeve 1 of the horizontal die casting machine in a state where the injection sleeve 1 is not cooled is measured to determine the reference position. When the molten metal is supplied from the pouring port to the injection sleeve, the injection sleeve 1 and the cooling sleeve 7 are transformed into a banana shape due to the heat of the molten metal. Therefore, the displacement transmitting member 16 and the leaf spring 2
Since the joint 18 supported by 0 moves upwards, the injection sleeve 1 is driven by the potentiometer 23 following this.
Measure the displacement in the orthogonal direction. While controlling the flow rate of the cooling fluid via the flow rate control valve 27 by this displacement signal,
A cooling fluid is made to flow from the cooling fluid supply source 26 to the displacement transmitting member 16, the pipe 11, and the cooling flow path 14 to cool the injection sleeve 1, so that the displacement of the potentiometer 23 becomes the reference position. Correct within a predetermined range.

Incidentally, in place of the potentiometer 23,
It is also possible to use a non-contact type sensor such as a magnetic sensor.

Further, the above-mentioned cooling channel is a cooling sleeve.
Apart from the ribs, it is also possible to form a meandering passage through a seal on the surface in contact with the lower surface of the injection sleeve for direct cooling.

Although the motor drive type flow control valve 27 is used as the flow control means, a proportional electromagnetic flow control valve may be used.

As described above, since the displacement transmitting member 16 is also cooled, it is possible to prevent thermal influence, and it is possible to measure the thermal deformation of the injection sleeve with high accuracy.

[0017]

According to the thermal deformation correction device for an injection sleeve of the present invention, the flow rate of the cooling fluid is adjusted according to the displacement of the injection sleeve while measuring the displacement of the injection sleeve of the horizontal die casting machine. Since it is controlled, deformation of the injection sleeve can be prevented, and smooth operation of the die casting machine can be realized.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a thermal deformation correction device for an injection sleeve of a horizontal die casting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection sleeve 10 Cooling hole 11 Pipe 13 Cooling sleeve 16 Displacement transmitting member 23 Potentiation meter 27 Flow control valve

Claims (2)

[Claims] 1. A horizontal die casting machine configured to inject molten metal, which has been supplied from a pouring spout into an injection sleeve, into a mold by a plunger, and is provided along an axial lower surface of the injection sleeve. A cooling flow path for guiding the cooling fluid, an elastic member supported at a fixed position such as a die plate, and an elastic member connected to the cooling flow path and extended in a direction orthogonal to the injection sleeve axis and supported by the elastic member. Displacement transmission member capable of passing cooling fluid, cooling fluid supply means for supplying cooling fluid from the displacement transmission member connected to a cooling fluid supply source to the cooling flow path, and injection following the displacement transmission member. The measuring means for measuring the displacement of the sleeve and the flow rate controlling means for controlling the flow rate of the cooling fluid on the basis of the signal of the measuring means are provided, and the cooling fluid is supplied by the cooling fluid supply means to the conduit. Through the displacement transmitting member via
An apparatus for correcting thermal deformation of an injection sleeve, wherein the flow rate of a cooling fluid is controlled based on the displacement signal obtained by the measuring means to correct the displacement of the injection sleeve within a predetermined range. 2. A cooling fluid, wherein a cooling hole is provided with a stop hole along the lower surface of the injection sleeve in the axial direction, one end is loosely fitted in the stop hole, and the other end is sealed at an inlet portion. 2. The thermal deformation correction device for a reeve according to claim 1, wherein the cooling flow path is configured to guide the heat.