JPS5831093A - Electroforming device - Google Patents

Abstract

PURPOSE:To prolong the life of a titled device by providing a shielding body between an electroforming bath tank contg. an electroforming mold and an electrode driving mechanism which moves an electrode and discharging the harmful gas produced between siad tank and the shielding body by means of a gas releasing device. CONSTITUTION:An electroforming bath 36 is supplied and interposed between an electroforming mold 1 and an electrode 14 and electricity of a prescribed polarity is conducted between the mold 1 and the electrode 14, whereby said mold is worked. A shielding body 30 is provided between an electroforming bath tank 2 contg. said electrode 14 and an electrode driving mechanism consisting of a rail 5, a traveling beam 6, a driving motor 9, etc. for moving the electrode 14. The corrosive and harmful gas generated between the tank 2 and the body 30 is fed to a treating device 34 for corrosive gas by operating a pump 33 via a pressure regulator 32. The body 30 is constructed freely extensibly and contractably in a Y-axis direction in accordance with the movement of the electrode 14.

Description

[Detailed description of the invention] The present invention relates to an electroforming device.

Electroforming is performed by supplying 1E of electroforming bath between one electromold and the electrode, applying current of a predetermined polarity between the electromold and the electrode, electrodepositing the electroformed shell on the electromold, and then applying the electroforming bath to the electrode. This method is used to manufacture parts by removing the entire cast shell from the electric mold, and is widely used when manufacturing parts and molds with shapes that are difficult to machine.

However, conventional single casting equipment has had two problems. One of them is that the shape of the electrode mold for electrodepositing the electroformed shell is generally complex, and the electrodeposition surface is full of undulations and irregularities of various depths and depths, so the electroformed shell of uniform thickness can be electroplated. It was difficult to electrodeposit on the mold.

However, as a means to solve this problem, it is possible to irradiate the electroform with hot rays to increase the deposition efficiency in that area and electrodeposit the electroformed shell, or to reduce the amount of electricity supplied between the electrode and the electroform or the electroforming process. This problem is being solved by the recent development of devices that control the amount of bath supplied depending on the position and shape of the electromold.

Another problem is that the corrosive gas and electroforming bath generated during electroforming corrode the electrode drive mechanism of the electroforming equipment, shortening the life of the equipment. Until now, no solution has been devised regarding this point, and for this reason, it has been difficult to use the electroformed tube for a long period of time.

The present invention was made from the viewpoint of cost efficiency, and its purpose is to prevent corrosive gases, evaporation of the electroforming bath, and the electroforming bath from being applied to the electrode drive mechanism of the electroforming device. The aim is to provide an electroforming device with a long service life.

Hereinafter, the details of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of an electroforming apparatus according to the present invention, FIG. 2 is a sectional view taken along line 1-1 in FIG. 1, and FIG. 3 is an explanatory diagram showing another embodiment.

In Figures 1 and 2, 1 is an electroforming mold, 2 is an electroforming bathtub, 3 is an electroforming bath supply device, 4 is an electroforming bath discharge device, and 5 is a rail provided on the wall of the electroforming bathtub 2. , 6 is a running beam with a car body 7.7 having wheels 8.8 at both ends, 9 is a running beam 6
10 and 11 are chain wheels, 12 is a chain, 13.13 is a sponge-like backing, 14 is a rod-shaped electrode, 16.16 is a pair of rails provided on the running beam 6, Reference numeral 17 consists of a vehicle body 18, wheels 19, 19, a drive motor 20, and others, and inside there is a guard sweater 21, a cap stan 22, pinch rollers 23, 24, . An X-axis traveling trolley 26 that moves in the X-axis direction and is equipped with a number of electrode elevating and lowering positions consisting of measuring rollers 25.
and 27 is a chain wheel, 28 is a chain, 29
is a shaft, 3030 is an expandable shield that can be expanded and contracted in the Y-axis direction, 31 is a cover fixed on the wall of the electroforming bath 2 and has a ventilation hole aiasaia in a part thereof, and 32 is the electroforming bath 1 A pressure regulating valve that keeps the air pressure in #2 constant; 33 is a pump that sucks corrosive gas; 34 is a corrosive gas treatment device; 35 is a DC voltage of a predetermined polarity or pulse between the electric mold 1 and the rod electrode 13; A power supply circuit 36 that supplies voltage is i!
There is an electroforming bath.

In addition, the inside of the electroforming tank 2 should be kept in a non-explosive atmosphere regardless of the generated gas, or the electroforming surface should be protected from oxidation when the electrode 14 is a nozzle that uses bath spray and sequential scanning electroforming methods. In order to prevent deactivation, a pressure gas supply device 7 such as argon, nitrogen, bicarbonate, etc. to inert the inside of the l1l12 is connected to the pressure gas supply device 7, and the pressure inside the pressure gas tank is controlled by a valve 4.
2 will be established depending on the need.

A slit is cut in the running beam 6 in the X-axis direction, and a spongy backing 13.13 is provided on the waste wall of the Surin F to prevent corrosive gas from flowing into the electrode drive mechanism. is provided. The rod-shaped electrode 14 passes through this slit, faces 111Elil, and spreads out the sponge-like backing 13.13 so that it can freely move in the X-axis direction. Further, the movement in the two axial directions is performed by the actions of a capsun 22 and pinch rulers 23 and 24 attached to the guard motor 21. The amount of vertical movement at this time is detected by the WIl roller 25 and sent to a numerical control device (not shown).

Running beam 6 and! Drive nine lambda motors 9 and 20 for driving the axially traveling trolley 17, and rod-shaped electrodes 13
The geared motors 21 for raising and lowering the electric motors 21 are collectively controlled by a numerical control device (not shown) in accordance with a putagram prepared in advance based on the shape of the electric motor 1fl.

The electroforming bath 36 is supplied from the electroforming bath supply device 3 continuously or intermittently, and in some cases with slight disturbance, so as to cover the entire surface of the bath 1. It is discharged by a bath discharge device 4. On the other hand, a voltage of a predetermined polarity is supplied to the electrode 1 and the rod-shaped electrode 13,
An electroformed shell is electrodeposited on.

When electrodeposition of the electroformed shell begins on the electromold 1, corrosive and harmful gases are generated. However, while the expandable shield 30 provided to cover the entire electroforming bath 2 prevents this corrosive gas from flowing into the electrode drive mechanism, the pump 33 treats this gas as a corrosive gas. Device 3
4 and provided in the cover 31.
Since fresh air is introduced into the electroforming bathtub 2 through the opening of the expandable shield 30 from the ias 31 and an appropriate inert gas is introduced into the electroforming bathtub 2 through the pressure regulating valve 42, there is no risk of explosion, etc., and the electrode drive mechanism can be operated. The air inside the room where this device is installed can also be kept clean because no parts will corrode and no harmful gases will leak out into the laughing gas. The air pressure inside the electroforming bathtub 2 is always kept approximately constant by the action of the pressure regulating valve 32.Next, we will explain Figure 3. In Figure 3, the same numbers as in Figure 1 are used. Those with asterisks indicate the same components, 14 & is a nozzle-shaped electrode, 3
7 is an electroforming bath supply pump that supplies the nozzle-shaped electrode 14 < electroforming bath 36, 38 is a pressure regulating valve that keeps the pressure of the electroforming bath supply pump 36 constant, 39 is a throttle, and 40 is a flow rate t of the electroforming bath 36. −
This is a flow rate control valve.

In this embodiment, the mechanism for preventing corrosive gas from flowing into the electrode drive mechanism is the same as that of the embodiment shown in FIG.

However, in the apparatus of this embodiment, the parts where the electroformed shell of the electroforming mold 1 is to be electrodeposited on S#r are connected from the electroforming bath supply pump 37 to the pressure regulating valve 38, the throttle 39, and the flow rate adjustment. The flow rate control valve 40 of the electroforming bath 36 pipe, which is transmitted to the nozzle-shaped electrode 13 & through the valve 40, is adjusted to increase the amount of ejection, and processing is performed while increasing the deposition efficiency. Electroforming bath 3 is applied to areas where the cast shell can be easily electrodeposited.
With the ejection amount of No. 6, an electroformed shell having a substantially uniform thickness is electrodeposited. Furthermore, since fresh electroforming bath 36 is always supplied to the surface of the electromold 1, the metal ion concentration is kept constant, and therefore the time for electrodepositing the electroform shell is significantly shortened.

In addition, in this embodiment, since the electroforming bath is injected from the nozzle-shaped 11-pole I& toward the mold 1, there is no need to place the electroform 11t immersed in the casting bath 36; Stand it upright, and place the tip of the nozzle-shaped electrode 141 horizontally about 90 degrees.
The electroforming may be performed while being bent and facing the electroforming mold 1 in the horizontal direction.

Since the present invention is constructed as described above, when using the device of the present invention, corrosion of the electrode drive mechanism etc. can be prevented, and the life of the device can be significantly extended.
Since the air inside the room where the equipment is installed is not polluted, the health of the workers is also ensured.

It should be noted that the present invention is not limited to the above embodiments. That is, for example, in the device of this embodiment, the electrode is moved up and down by the geared motor via the capstan, but it is also possible to use another known drive device #S without using the 1-geared motor. Furthermore, the supply method of the electroforming bath, the method of controlling the ejection amount, etc. can be freely changed within the scope of the purpose of the present invention, and the present invention encompasses all of them. .

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the electroforming apparatus according to the present invention, FIG. 2 is a sectional view taken along line 1-1 in FIG. 1, and FIG. 3 is an explanatory diagram showing another embodiment. 1...su...
・・・・・・・・・Electric type 2・・・・・・・・・・・・・・・
・・・・・・Electroformed bathtub 3・・・・・・・・・・・・・・・
......Electroforming bath supply device 4...
...... Electroforming bath discharge device 5.16...
・・・・・・・・・Rail 6・・・・・・・・・・・・
・・・・・・・・・Travel beam 7.18・・・・・・
......Car body 8.19...Wheels 9.20...Motor for drive 10.11.26 .27...Chain wheel 12.28...Chain 13...
・・・・・・・・・・・・・・・ Sponge-like backing 14 ・・・・・・・・・・・・・・・ Rod-shaped electrode 1
4&・・・・・・・・・・・・Nozzle-shaped electrode 17
・・・・・・・・・・・・・・・Y-axis direction traveling trolley 30・・・・・・・・・・・・・・・Extensible shield 31...・・・・・・・・・・・・・・・Cover 3
1a・・・・・・・・・・・・Vent hole 32...
.........Pressure regulating valve 33...
・・・・・・・・・・・・Pump 34・・・・・・・
・・・・・・・・・Corrosive gas treatment equipment 35...
.........Power circuit 36...
・・・・・・・・・・・・・・・ Electroforming bath top thick section

Claims (1)

[Scope of Claims] 1) An electroforming device that processes an electroforming device by supplying an electroforming bath between the electroform and the electrode and applying current of a predetermined polarity between the electroform and the electrode, in which the electroform is housed. A shield is provided between the electroformed bathtub and the electrode drive mechanism that moves the electrode, and an exhaust system is installed to exhaust harmful gases generated between the electroformed bathtub and the shield. The above electroforming equipment. 2) The electroforming apparatus according to claim 1, wherein the shield is expandable and contractable according to the movement of the electrode.