JPH0669607B2 - A device for applying powdered lubricant to the inner surface of a horizontal injection sleeve. - Google Patents

Description

The present invention relates to a coating device for electrostatically coating a powder lubricant on the inner peripheral surface of an injection sleeve incorporated in a lateral injection type die casting machine. is there.

<Prior Art> The applicant of the present application has previously proposed an electrostatic coating device for electrostatically coating a powdered lubricant on the inner peripheral surface of an injection sleeve (Japanese Patent Laid-Open No. Hei 10 (1999) -242242).
2-205244).

<Problems to be Solved by the Invention> The present invention provides a device for applying a powdery lubricant to the inner surface of a horizontal injection sleeve that can easily and reliably electrostatically apply a powdery lubricant to the inner peripheral surface of the injection sleeve. It is intended to be provided.

<Means for Solving the Problem> A device for applying a powdery lubricant to the inner surface of a horizontal injection sleeve of the present invention which achieves such an object is connected to a high voltage generator by wiring and is connected to the inner peripheral surface of the injection sleeve. An electrode rod for generating an electrostatic electric field between them, an electrode insertion cylinder for inserting the electrode rod into the injection sleeve through the hot water supply port of the injection sleeve, and an electrode rod inserted in the injection sleeve for the injection sleeve. It is composed of an electrode centering cylinder for laying along the axis, and the electrode inserting cylinder is installed at the upper position on the injection cylinder side toward the hot water supply port of the injection sleeve, and the electrode is mounted on the slide block of the electrode inserting cylinder. The centering cylinder is attached so as to operate in the vertical direction, and the electrode centering cylinder is instructed to fasten the rear end of the electrode rod toward the hot water supply port of the injection sleeve, and the electrode rod is attached. It is characterized in that an insertion portion having a length substantially the same as the length of the injection sleeve and a centering escape portion bent and extended from the insertion portion are formed in a substantially V shape.

<Operation> When the electrode inserting cylinder is inserted (advanced) to move the electrode rod together with the electrode centering cylinder, the insertion portion of the electrode rod is inserted from the hot water supply port into the injection sleeve. Simultaneously with the completion of the insertion operation of the electrode insertion cylinder, the electrode alignment cylinder is operated to align the insertion portion of the electrode rod along the axis of the injection sleeve.
After that, an electrostatic electric field is generated between the insertion part of the electrode rod and the inner peripheral surface of the injection sleeve, and the powder lubricant supplied by being blown into the injection sleeve is electrostatically applied to the inner peripheral surface of the injection sleeve. To do.

<Example> Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

In the figure, A indicates a positive electricity generating device, which is connected to the high voltage generator a ₁ by wiring to generate an electrostatic electric field between the electrode sleeve a ₂ and the inner peripheral surface b ₁ of the injection sleeve B, and This electrode rod a ₂
Of the electrode insertion cylinder a ₃ for inserting the hot water into the injection sleeve B through the hot water inlet 1 and the injection sleeve B.
The electrode rod a ₂ inserted inside the shaft sleeve X of the injection sleeve B
It is composed of an electrode centering cylinder a ₄ for aligning with the upper part.

The electrode insertion cylinder a ₃ is a rodless cylinder that operates using pressure oil or the like as a working medium, and is installed at an upper position on the injection cylinder C side toward the hot water supply port 1 direction of the injection sleeve B. That is, a fixing instruction is provided across the fixture 2 installed on the cylinder head c _{1 of the} injection cylinder C and the fixture 4 installed on the bridge plate 3 installed on the injection cylinder C from the fixed platen d ₁ of the die casting machine D. Then, the electrode centering cylinder a ₄ and the high voltage generator a ₁ are attached to the front and rear slide block 300. In addition, this electrode insertion cylinder a ₃
The inclination angle toward the hot water supply port 1 direction is the above-mentioned fixture 2
It can be freely changed by adjusting 4 and 4.

As the electrode centering cylinder a ₄ , a rodless cylinder is used similarly to the electrode inserting cylinder a ₃ , the cylinder tube is fastened and supported by the slide block 300 of the electrode inserting cylinder a ₃ , and the lower moving block 400 moves vertically. Then, the rear end portion of the electrode rod a ₂ is fastened and supported by the lower moving block 400 via the two support rods 5.

The electrode rod a ₂ is formed in an approximately V shape by an insertion portion 200 having a length substantially the same as the length of the injection sleeve B and a centering escape portion 201 bent and extended from the insertion portion 200. The rear end portion of the centering escape portion 201 is bent substantially parallel to the insertion portion 200, and the electrode block 02 is integrally attached to the rear end portion by welding or the like.
It is inserted into the electrode holder 7 fixed by bolts 6 between the tips of the supporting rods 5 of the book, and is fastened and supported by the plunger bolts 8. Then, the plunger bolt 8 for fixing the electrode block 202 and the high voltage generator a ₁ attached to the slide block 300 of the electrode insertion cylinder a ₃ are connected by a high voltage cable 10 (see FIGS. 2 and 3).

The rear ends of the two support rods 5 are mounted and supported on the lower moving block 400 of the electrode centering cylinder a _{4 by} the mounting holder 9, and are mounted parallel to the hot water supply port 1 direction of the injection sleeve B. The electrode holder 7 is attached to the tip end of the electrode holder 7 with bolts 6. In addition, 11 and 12 in the figure are electrode rods a
_This is a notch formed to prevent the electrode rod a ₂ from coming into contact with the edge of the hot water supply port 1 when the insertion part 200 of ₂ is put in and taken out from the injection sleeve B.

Next, the operation of the device of the present invention linked with the die casting machine D will be described.

First, in order to prevent the electrode rod a ₂ from interfering with the hot water supply work into the injection sleeve B, the electrode insertion cylinder a ₃ is used to wait until the lubricant application work start time of the die casting machine D (state of FIG. 1). When applying the lubricant, the electrode insertion cylinder a ₃ is moved forward to move the electrode rod a ₂ , the electrode centering cylinder a ₄ and the high voltage generator a ₁ forward to move the electrode rod a 3.
_{The second} insertion part 200 is inserted into the injection sleeve B from the hot water supply port 1 (state of FIG. 4). Next, the electrode centering cylinder a
₄ is operated so that the insertion portion 200 of the electrode rod a ₂ becomes the injection sleeve B.
The electrode rod a ₂ is moved downward along the axis X of (1) (state shown in FIG. 5). Thereafter, by which the electrostatic field between the high voltage generator a electrode rod a ₂ and the injection sleeve inner circumferential surface b ₁ by _1, supplied blown into the injection sleeve B with with a lubricant supply nozzle E The powdery lubricant is electrostatically applied and electrostatically applied to the inner peripheral surface b ₁ of the injection sleeve B. After the powder lubricant is applied, the electrode rod a ₂ is returned to the original position (the position shown by the solid line in FIG. ₄₎ in the injection sleeve B by the electrode centering sill ring a ₄ and the electrode is inserted. It is pulled out from the injection sleeve B by the cylinder a ₃ and kept waiting until the start of the next coating operation.

After that, the above operation is repeated during the lubricant application work of the die casting machine D.

The powdery lubricant used in this example is a powder which is non-reactive with the molten metal, more specifically, powder having an electrostatic property such as boron or talc, or a metal oxide, a metal sulfide or a metal chip. Examples of the powder include powders such as oxides, and powders obtained by mixing these powders with resin powder. Among them, the plunger tip F for the inner peripheral surface b ₁ of the injection sleeve B is particularly preferable.
In order to improve the lubricity, it is preferable to use a powder having a self-lubricating property in a powder state.

<Effects of the Invention> Since the apparatus for applying the powdery lubricant to the inner surface of the horizontal injection sleeve of this embodiment is configured as described above, the electrode rod (the insertion portion thereof) can be easily inserted from the hot water supply port of the injection sleeve into the injection sleeve. It can be inserted and at the same time (the insertion part of the inserted electrode)
Can be easily aligned with the axis of the injection sleeve. Therefore, the powder lubricant supplied into the injection sleeve can be electrostatically applied to the inner peripheral surface of the injection sleeve easily and reliably.

[Brief description of drawings]

The drawings show an example of the implementation of the present embodiment. FIG. 1 is a front view showing a state in which an electrode rod is on standby at the retracted limit of an electrode insertion cylinder, and FIG. 2 is a partially enlarged plan view with a part cut away. Indicates,
FIG. 3 is a vertical sectional front view, FIG. 4 is a front view showing a state in which an electrode rod is inserted into an injection sleeve, and FIG. 5 is a front view showing a state in which the electrode rod is arranged along the axis of the injection sleeve. , Sixth
The figure is a plan view of the same. Figure A: positive electricity generator, a _1: high-voltage generator, a _2: electrode rod a _3: electrode insertion cylinder 20: the insertion portion, 201: centering flank section a _4: electrode centering cylinder, B: Injection sleeve, b ₁ : Inner surface 1: Hot water inlet

Claims (1)

[Claims] 1. An electrode rod for connecting an electric wire to a high voltage generator to generate an electrostatic electric field between the electrode sleeve and an inner peripheral surface of the injection sleeve, and the electrode rod from a hot water supply port of the injection sleeve into the injection sleeve. It is composed of an electrode insertion cylinder for inserting and an electrode centering cylinder for aligning the electrode rod inserted in the injection sleeve on the axis of the injection sleeve, and the electrode insertion cylinder is located at an upper position on the injection cylinder side. Installed toward the hot water supply port of the injection sleeve, attach the electrode centering cylinder to the slide block of the electrode insertion cylinder so as to operate vertically, and direct the electrode centering cylinder toward the hot water supply port of the injection sleeve. A rear end portion of the electrode rod is fastened and supported, and the electrode rod has an insertion portion having a length substantially the same as the length of the injection sleeve, and a centering escape portion bent and extended from the insertion portion. Coating apparatus of powdery lubricant to the horizontal injection sleeve inner surface, characterized in that formed in the shape of the substantially.