JPS58167777A - Method and apparatus for surface treatment - Google Patents

Abstract

PURPOSE:To apply surface treatment only to a treatment required part accurately, in applying surface treatment such as plating only to the necessary part of parts having a complicated shape, by sealing the boundary of a treating part and a non-treating part to constitute the part of the inner wall of a hermetically closed container for surface treatment by the treating part. CONSTITUTION:A hermetically closed container 14 is formed by clamping the gears 1, 1' of a material to be treated by upper and lower jigs 5, 8 and a spacer 2 made of an insulating material and divided into a treating part and a non- treating part by a rubber seal 3. After washing water or a pretreating liquid is supplied from an inlet and an outlet 13, 13' to carry out washing or pre-treatment, washing water or the pretreating liquid is discharged each time by compressed air. After washing is further carried out by clean water, a surface treatment liquid such as a plating liquid is recirculated in a container 14 to apply plating treatment only to a necessary part divided by the rubber seal 3 while the plating liquid is discharged by compressed air. By this method, partial surface treatment is carried out under an economical and excellent environment without wastefully using the treating liquid and the washing liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention partly relates to a surface treatment method and apparatus Il for parts requiring chemical surface treatment, and the chemical treatment herein includes electrolytic and electroless treatment, and specifically Includes treatments such as electroplating, electroless plating, electrolytic etching, electroless etching, electrolytic polishing, and chemical polishing.

In the conventional chemical treatment of parts, a method has been used in which the parts are immersed in 11 m of Japanese cypress, and in the case of partial treatment, a method is known in which only the part of the part is immersed in liquid cypress. However, with this method, if the shape of the part becomes complex, parts that do not need to be treated must be immersed and plated, which is uneconomical. It is also known to cover the non-processed parts with tape or the like, but in that case, if the shape of the part becomes complex, the liquid type work becomes difficult. A method of applying melamine resin thread paint to the entire surface, then removing the paint from the 11th part of the surface, and then carving only the treated part from the 6th layer and then cleaning it (Special Introduction 55-21)
549) is known, but there is a problem that it becomes difficult to remove the fee when the shape of the disposal part is complicated. Moreover, when cleaning the processing section, it is necessary to clean the entire area including the non-processing section, which is uneconomical.

In view of the above-mentioned drawbacks, the present invention provides a surface treatment method and apparatus that can accurately process only the part** of the part and does not touch the treatment liquid except for the part II, which is economical with less loss and is easy to automate. The purpose is to provide a method for treating parts that require partial chemical surface treatment and non-l&
Seal the entire perimeter of the boundary with Santo with a ring of rubber-like elastic material,
It forms part of the inner wall of the VB closed container for chemical processing in the processing section,
It is characterized by chemically treating the treated area by filling the chemical treatment container with a treatment liquid, and the device can remove the entire boundary between the treated area and non-treated area of parts that require chemical surface treatment in one minute. It is characterized in that the periphery is sealed with a ring of rubber-like elastic material, and the processing section forms part of the inner wall of a chemical processing container filled with processing liquid. In addition, as described in detail in the examples below, the cleaning liquid, processing liquid, etc. are replaced after removing the liquid from the previous process by blowing air in a closed container.
Mainly for valve operation or disconnection of connecting piping II! It depends on the situation.

Next, the present invention will be explained based on the drawings.

(υ Describe the lubrication area m for the gear inner shaft sliding capital.

Conventionally, after the entire gear is immersed in a phosphate solution, the entire gear is washed with water, and a molybdenum disulfide-containing agent is applied to the inner shaft rotating portion of the gear by spraying to perform #sliding treatment. Therefore, not only is it uneconomical because areas other than the processing area are immersed, but the spraying also creates a problem in which the working environment becomes hostile.

Diagram IJ1 is a vertical #JIFFkU diagram showing a closed container for chemical treatment of the surface treatment apparatus according to the present invention. 2 gears 1.
1' are stacked on top of each other substantially in parallel with each other via a spacer 2 made of a disc-shaped insulating member (for example, resin), and an annular rubber seal 3 (ring) is fitted into a hole 2 & provided at the center of the space +2. It's complicated. The seal 3 protrudes slightly upwardly and downwardly inwardly from both the upper and lower surfaces of the spacer 2 by the same number of degrees, and its tip abuts the gear 1.1', and there is an interference margin of 4 between the gear 1.1' and the spacer part 2. is formed. The jig 5 for forming a flat surface ikI5m opposite to the first surface of the gear 1' has a hole 5b in the center, and the peripheral edge of the hole 5b protrudes slightly above the flat surface jj5m to form the lower surface of the gear 1'. An annular rubber seal 6 (ring) that abuts is fitted, and an interference 7 is formed between the downward movement of the gear 1' and the flat jU5m. The jig 8, which has a flat surface 1iisa facing the upper ti of the gear 1, has a hole 8b in the center, and at the periphery of the hole 8b there is an annular ring that protrudes slightly downward from the flat surface B island and comes into contact with the upper ff1K of the gear l. A rubber seal 9 (ring) is fitted, and a tightening type lO is formed between the upper surface of the gear 1 and the flat surface 111m. Gear 1.1', okay? 2. The outer cylindrical surfaces of the jigs 5 and 8 each have the same radius, and the outer cylindrical surface of the jig 5 has the same radius.
The cylindrical shape 1i11 fitted and fixed to the gear 15e is the gear 1.1.
', spacer 2, and jig 8, respectively, and are held concentrically. Inward gear 1.1' inward shaft sliding capital 1a*1'a and rubber seal 3.6.9 inner j11
The surfaces have m-radii and are concentrically arranged to form a chemical processing vessel 1112 with one cylindrical inner surface. The hole 5b becomes smaller as it goes downward, and forms an entrance/exit 13 for a seal 1112 at the lower end of the jig 5, and the hole 8b becomes narrower as it goes upward, and forms an entrance/exit 13 for a seal 1112 at the upper end of the jig 8. It forms an entrance/exit 13x'.

FIG. 2 is a conceptual diagram showing an embodiment of the IT store system according to the present invention. The closed container 14 is compressed and held between the earthworks by piping jigs 15 and 16, and the passage 17 provided in the upper piping jig 15 is provided on the surface of the jig 15 on the jig 8 side. The passage 19 provided in the lower piping jig 16 communicates with the inlet/outlet 13'' while maintaining liquid tightness through the O-ring 18 provided in the jig 16. It communicates with the inlet/outlet 13 while maintaining liquid tightness by the ring 18'.If the piping jig 16.16 is loosened from the closed container 14, the container!
．． You can move the 16 temples left and right, and you can move! 1114 entrances and exits 13' and 13 are separate passages 20.21.2
2 and passages 23, 24, and 25. 26 is the 0 ring.

On the other hand, in the cleaning device 11127, the inside of the tank 28 for the trichloride solution (or fluorocarbon gas) is divided into two sections by a middle plate (partition plate) 28a, and a heater 30 for heating the trichloromethane solution is installed below the trichloride solution 2g. provided, tank 28
A cooler 31 for condensing the trichlene vapor generated by heating is provided at the upper part of the tank, and a saucer 33 for sending the condensed liquid to a storage tank 32 is provided. Collected wealth on board 2
A purifier 34 is connected to the tank 28 for purifying the trichloride solution in the tank 9 and sending it to the storage tank 32.

In the pretreatment device 1135, a heater 37 is provided in a part of the tank 36 containing the II salt solution to bring the solution to the island temperature, and next to the tank 36 is a heater 37 for controlling the concentration of the salt solution. A liquid l1l11 regulator 38 for performing mu is connected.

The Shisui f/1139 is equipped with a circulating water tank 40 and a clean water tank 41, and the tanks 40 and 41 are clean water! 4
They are connected via 2. 40'' is a filter.

- The processing chamber @ 43 is formed from a tank 44 in which an am processing solution (molybdenum disulfide-containing solution) is stored.

In the figure, ■ indicates a valve, and r indicates a pump.

The passage 17 is supplied with a pressure of 1lli! via a valve Vgt provided on the pipe 45. It communicates with the air cylinder 46, and the pulp Vma 1
and steam 1114 in tank 28 via pump Pvl.
7 and communicates with the storage liquid tank 32 via valve Jl and pump pH. The passage 19 communicates with the steam layer 47SC via a valve 'vl provided on the pipe 48. The passage 20 communicates with the cylinder 46 through a valve Vgs on a pipe 49, and with the upper part 50 of the tank 36 through a valve V1g. The passage 21 communicates with the cylinder 46 via the valve Vg8 on the arrangement 151 and the valve Vd.
3 and pump P! ! 3 into the clean water of the tank 41. The passage 22 communicates with the cylinder 464c via a valve g4 on the pipe 52, and communicates with the cylinder 464c through a valve V14 in the tank 44. Good luck lol! 23 is placement 1
Tank 36 via valve h on 53 and pump Pig
The pretreatment liquid inside is in communication with the middle plate. The passage w124 opens into the tank 40 via the valve %I3 on the pipe 54,
Numbers are marked so that the cloudy water inside the filter 40' can be poured into the filter 40'. The passage 25 is connected to the valve V4 on the pipe 55 and the pump P.
It communicates with the soaking area **- in the tank 44 via j4.

Next, the surface treatment method according to the present invention will be explained using the above-mentioned apparatus.

a) Apparatus 1: Place the gear 1' on the jig 5 (Fig. 1), then place the gear 1 through the spacer 2, and place the jig 8 from above to form a one-block airtight container 14. do. Next, the airtight container 14 is fitted between the piping jigs 16.16 (Fig. 2), and the entrances and exits 13.13' are arranged so as to be delayed to the passages 19.17, respectively. The container 14 is tightened and identified from both directions.

b) Activate the cleaning pump pH, close valve VII and %+, stop other pumps, close other valves, and add trichlorofluorocarbon solution (or Freon solution)! ! It passes through the closed container 14 and is passed through the piping 48 [! ! 1 Return to storage tank 29 for cleaning.

Note that steam cleaning may be performed by operating Pvr and ~Vl as necessary, and purification as necessary! 134, the zero order valve Vls.

Vma1. Piping 4 with pressure air using vl and Vgl
5.48 and l closure! After driving out the Triclean in 114, close all the valves.

C) Tsumugi processing; move the container 14 and open the entrances and exits 13゛, 13
are tightened so that they communicate with passages 20 and 23. Next, open the valves Vl and V/l, operate the pump Pig, and pour in the pretreatment liquid! 114 for circulation, and pretreatment is carried out between necessary preparations. Turn off the source of the pump PI11, turn off the valve V',~Jil, and Vgl, and turn the pressure IIFIg! After removing the pretreatment 11& in the circuit with air, all valves are closed.

d) Water wash; Valley! 114 to the passage 21.24 side!
I! After switching to J1, perform the above operation and adjust the valve %18,
After cleaning with clean water by operating b, ~ga and pump 14B, water is removed from the circuit using pressurized air.

6) *After connecting the cleaning container 14 to the 22.2S side, turn the valve %W4. V14. ~g4 and pump P14 are operated to allow the processing liquid to enter the container, and after a predetermined period of purification, the processing liquid is removed from the first passage by compressed air.

. As explained more than once, in this embodiment according to the invention:
Place 1! ＃It is economical as there is almost no wastage of cleaning solution.
Moreover, since the processing process is carried out in a closed circuit, there is no risk of the work environment becoming unstable. It is also easy to automate.

(The alumite treatment of the ring groove and top of the 21 piston will be described.

Conventionally, the non-shipping part is masked and the entire part is immersed for alumite treatment. Therefore, the scale is not economical as it tends to waste the processing liquid, and masking is a troublesome task.

FIG. 3 is a longitudinal sectional front view showing a case where the closed case of the surface treatment apparatus according to the present invention is employed for alumite treatment. A jig 57 having a cylindrical inner JllIl blood 57& is integrally fitted to the jig 56, and a jig 58 that makes the cylindrical inner JI11 surface 581 1 is fitted to the Hlot57&. The Kowaraji Ji156.57.58 is made of an insulating material (for example, resin). Jig 5
8, a piston 59 is fitted into the lower part of the piston 51m, and is held in a predetermined position by a holding member 72 shown in FIG. The lower part of the piston 59 is the jig 5
The holes 60 provided in the piston 59 are fitted at intervals, and the boundary between the treated surface and the non-processed direction of the piston 59 and the upper end of the piston 59 is fitted in the lower end of the hole 58m provided in the jig@5g. The lower end portion 61m of the rounded seal 61 seals the lower end portion 61m.

Piston 59, hole 60. The can closing chamber 62 formed by the seal 61 (17 ng) passes through the - upper end of the large 6o side.
3, and the passage 63Δ is connected to the jig 57 and the outside I of the jig 57.
A connecting member 64 integrally fixed to i is crushed and opened at the upper end of the member 64 to form an entrance/exit 65. -1
The bottom surface of the hole 6o has a conical surface that becomes lower toward the center, and a passage 63B provided at the lower end passes through the jig 57 and the communication member 64, opens at the lower end of the member 64, and forms an entrance/exit 66.
has been formed. On the conical surface of the hole 60, a dish-shaped electrode 67 (for example, made of platinum or lead) having a large number of holes and having a radius approximately the same as the radius of the piston 590 is placed. The shape of the electrode 67 is determined so that the distance from the electrode 67 to 59 m is approximately constant. Mataana 6o
Two annular electrodes 69 (made of platinum or lead, for example) facing the ring 68 of the piston 59 at a substantially constant interval are embedded in the wall of the piston 59 . As conceptually shown in the figure, one pole of a power source that can be energized when necessary is connected to the electrodes 67 and 69, and the piston 5
9 is connected to an anode. Note that the jig 56.5g and the piston 59 are integrally clamped by a clamp 7o indicated by a two-dot chain line. 71 is a piston cylinder of the clamp 7o, and 71 is a piston rod.

The sealed container ji73 according to the embodiment shown in FIG. The surface treatment device I, in which Ill1 was replaced with a pore treatment liquid (e.g. boiling water), was filled with a tight container I! 14.

Next, the table-to-ship method according to the present invention when using the above *& for alumite treatment will be explained.

a) *Inner circumference on Iliji J456 & 68 a inner nol
Place the jig 58 fitted with the r localization 1C screw 59,
Fixed by clamp 70 J456.58 and piston 69
be fixed integrally. Next, the connecting member 64 is fitted between the piping jigs 15 and 16 shown in FIG.
After the members 64 are placed in positions communicating with the 11 passages 17 and 19, the members 64 are tightened and fixed from both the upper and lower sides using the jigs 15 and 16.

b) Washing: Carry out in the same manner as in Example (1) of Act IIIA.

C) Water washing: After the container 1173 is fastened to the passage 23.24@, the water washing is carried out in the same manner as in Example (1).

d) li#polar oxidation: After moving and tightening the container 73 to the passage 20.23 side, open the valves Vs and Vβ2 and adjust the pump pH.
Activate 2 to seal the anodizing liquid! ! 73 is filled, and the piston 59 becomes positive, and the electrode 67.
Give a potential difference so that 69 becomes negative and positive! Perform oxidation. After completing the anodization, remove the potential difference and close the valve Vgs.
Open it and press it! 3 Remove the liquid in the circuit with air.

・) Sealing treatment; C) After water washing in the same process as water washing, tank 4
4 to pump boiling water '14, valve v4/V14
It is sent into the container h73 through the hole sealing process.

As explained above, this embodiment has the advantage that it is not only economical since there is almost no wastage of processing liquid, but also that the masking work is irregular and the work process is simplified.

(3) Let's talk about chrome plating on the outside of the piston.

Conventionally, plating has been performed by immersing the entire surface.

The plating process includes tll & greasy, (fil water washing, 伽) etching, v water washing, sandal) smut removal, water washing, (Vl nitriding treatment, water washing, position-zincate coating, water washing, (Via) chrome plating, water ek, ( It is washed at V age #.

FIG. 4 is a longitudinal sectional front view showing the case where the sealed container of the blood vessel loading plow according to the present invention is adopted for chrome plating, and FIG. 5 is a V-VIFrIi diagram thereof. The cylindrical jig 74 has a cylindrical hole 74' in its upper surface.

A piston 75 is housed downwardly in the hole 74' at intervals, and the piston 75 is fixed to a jig 77 by a holding member 78 via a seal ring 76. Holding member 7
8 is a 1゛-shaped member 79, a disk 8゜, and a 1゛-shaped member 7I
Nut 81 arrives at C41 and fixes member 79 at home job 80.
It is composed of. Jig 7 fixing the piston 75
7 is a cylinder ivi77m that fits into the hole niji, and a hole 74'
The cylinder 1 has an outward 7 flange 77b with a longer radius.
Seal ring 82 installed on j77m or cylinder 1j77
A seal is formed between the island and the hole 74', and the 7-lunge 77b
is in contact with the island 74 in the upper end of the jig 74 to hold the piston 75 in the hole 74' at a predetermined position tK-. Further, these jigs 74 and 77 are made of an insulating material (for example, resin). In the closed chamber 83 formed by the hole 74' and the piston 75, eight passages 84 are provided radially in the upper end of the jar on the side of the hole 74', as shown in FIG.
Each passage j184 horizontally penetrates the jig 74 and opens on the outer wall surface 85, and has entrances and exits 86mm, 87Δ, . . . , 93, respectively.
It forms a system. The bottom surface of the hole 74' has a conical surface that becomes lower toward the center, and a passage 94 provided at the lower end communicates with eight passages 95 in a radial shape in this example.
Each passage 95 horizontally passes through the jig 74 and extends outward 11iii.
Take a bite at 85, exit and exit 86j1.87B, respectively.
,,93B are formed. A dish-shaped electrode 96 (for example, made of platinum or lead) having a large number of holes and having a radius of about the diameter of the piston 75 is installed on the conical surface of the hole 74'', and the electrode 96 and the tip direction 75& of the piston 75 are disposed. The shape of the electrode 96 is determined so that the distance is approximately constant.A cylindrical electrode 97 is fitted and defined in the @- of the large 74°, and the piston 7
An inward flange-like projection 97m is integrally formed on the portion facing the ring 75b of No. 5. electrode 96.9
7, the required ILI-
The anode of a power supply capable of overcurrent of 1 J is connected to the piston 75, and an electrode is connected to the piston 75.

FIG. 6 is a conceptual diagram illustrating an embodiment of the display device according to the present invention incorporating the electrically protective container shown in FIGS. 4 and 5. FIG. Sealed container! 198 entrances and exits 86m,...93m, Q
siS, ..., 93B each have a degreasing device 199.
%Water washing@100, etching WI (not shown below)
, smut removal equipment, nitrile II equipment, zincate treatment 1
1! Mi1M, chrome plating equipment, and hot water washing machine are connected. A degreasing liquid is stored in the tank 101 of the degreasing electric appliance 99, and water is stored in the tank 102 of the water washing equipment ($1100).In the figure, each V indicates a valve and P indicates a pump. In particular, 103° and 104 are pressure reducing valves, and 105
．． 106 is a constant pressure valve, constant pressure valve 105.10
One end of tank 101.10 is open to the outside.
The pressure inside 2 is kept constant. 10
7 is a compressed air cylinder.

Next, the surface treatment method according to the present invention when using Joki wax will be explained.

a) Device: Fix the piston 75 to the jig 77 (FIG. 4) with a holding member 78, and insert the piston 75 into the hole 74 of the jig 74.
° Insert it into the tortoise and fix it in place.

b) Activate the degreasing 6 pump PI (Fig. 116), valve Vt
e, V+b, Via, and Via are opened, and the degreasing liquid is passed from the tank 101 through the piping 108 via the pump P1 and the valves %Ie~lb, and then the degreasing liquid is passed through the tank 101 into the closed container 98.
The air inside the circuit is returned to the tank 101 via valves V1m + to 1c to expel the air in the circuit. Next, while pump P1 is kept operating, valves Vxe and Vto are closed, and valves Vls, Vta, Vlb,
If the degreasing liquid is circulated in the closed container 98 and the inside of the closed container 98 is degreased. After a predetermined period of time has elapsed, stop the pump l's and close the valve vim.
~1b, Vta, Vld, Vle.

Vtf, Vnt * Vgx wo
tc.

Vle, Vll, close Vll, Tsuharub V
gi, Vga (not shown below), ..., vgll and valve Via.

Open Vga (not shown below), ..., Vs+a,
Further, the valves Vs+f, Vaf (not shown below), ..., Vsf and V*b, Vsb
(a lower ffi ff) , .=, By opening Vsb, all the liquid in the passage 84.95 other than the degreasing wave circuit is removed, and then all the valves are closed. Here, the internal pressure in the tank 101 is maintained at, for example, 0.21 g/cm11 or less by a constant pressure valve 105, and is set to easily capture air at a pressure of 1M.

Incidentally, similarly to the embodiment shown in Figure 2, steam cleaning may be performed at any time.

C) Washing with water Similar to the above shark fat process, pump PM and Hihalf Vga , -, , Vga , Vllz , t<
Operate the syp Vgs to perform water washing, and then check the Vsf and other valves in the electrical equipment ~+a, V3a, ..., v8
Island, valve V1b, V8b, ,,,,Vsb
1z (Ruf%1f, Vaf, ..., ■8
Heavy and valve Vgl, ~g8, ..., Vg
After removing the water in the passages 84.95 other than the water washing circuit by operating 1, all valves are closed.

The subsequent steps (iii) etching;
Water V washing, (l smut removal, water washing, (V) nitric acid treatment, water washing,
(vl) Zincate treatment, water washing, (Vll) chrome plating, water washing, (Vial) h washing. In the first stage of Naori ROM plating, there is a piston head 75 and an electrode 96.
．． It is necessary to provide a constant potential difference between KFRj+ and 97.

As explained above, according to this embodiment, not only is there no waste of processing liquid, but there is also no waste of processing liquid. 184.95 are installed in a radial manner with 8 pieces each, and each 461i tortoise is installed at each entrance! 111, it is easy to maintain the f&tightness of each processing circuit, and furthermore, since operations in the processing process are limited to pumps and valves, there is an advantage that automation is easy.

(Let's talk about the multilayer plating on the finger part of the pull valve.

Fig. s7 is a longitudinal sectional front view showing the case where the surface treatment apparatus according to the present invention is employed for multilayer plating treatment of the finger part of internal combustion engine - stone pulp. The jig 109 is provided with a cylindrical hole 110 that opens at the upper end, and has a hole 111 nose in the center. 11
1 is shown integrally V-direction toward the top of the fixture 34109. A jig 113 is fitted into the hole 112 of @111 and is stopped and fixed by a stopper 1llb.
Hole 1136 and hole 11 concentric with hole 1118 provided in
1 m, a valve 115 is placed from above through a seal ring 114, and a valve portion 117 of the valve 115 is supported by a conductive annular support member 118. At the upper end of the airtight blockage 119 formed by the 1- of the hole 110 Jrll and the finger *JJ Iku 116, a number of jIWII 120 necessary for the plating process are arranged radially in the same manner as in the embodiments shown in FIGS. 4 and 5. Provided! 1
At the lower end of 19, there is a radial and aperture that communicates with the passage 121.
20 passages 122 are provided. Electrode 123
has a cylindrical shape and is fitted and fixed in the an of the hole 11G, and as conceptually shown, a wire is connected to the electrode 123 and the support member 118, which can be energized when necessary.

The closed container 119 shown in FIG. 7 is used in place of the closed container 98 in the surface treatment** shown in FIG. 6. In this case, of course, the processing solution in the tank can be replaced with pericardium for nickel plating, chrome plating, etc. Further, as a nickel supply source, a nickel electrode (not shown) that is not connected to the electrode h123 at once may be provided.

According to this embodiment, the treatment process can be easily carried out with only pump and valve operations, and the possibility of other enemies entering the chamber 111 is reduced. Furthermore, the distance between the pole 123 and the member to be processed is always maintained at a predetermined value.

It also becomes easier to form thin plated noodles. Therefore, for example, it is easy to perform chromium plating after nickel plating, or to repeat this process to form multilayer plating.

Although the above description has focused on plating and other polishing, the present invention can of course be easily applied effectively to electrolytic W# polishing and chemical polishing.

Furthermore, it is also possible to use other gases in place of compressed air, for example, an inert gas may be used to prevent oxidation.

As explained above, the present invention has the following advantages.

■ It is possible to perform surface treatment only on the areas where the nest is necessary.

■ It is economical and requires minimal use of the kinatu, which only partially touches the liquid, liquids, materials, electricity, etc.

■ Parts can be sent in small quantities and can be easily connected directly to the production line (reducing work-in-process items).

■ It is easy to make settings suitable for the conditions of each part, such as the electrode position and the shape of the sealing plan, and uniform strain can be achieved. Therefore, composite plating and multiple plating can be easily performed.

■ Easier to automate.

■ Improves the work environment by processing bills in a closed room.

■ The entire boundary between the treated and non-treated areas is sealed with a ring of rubber-like elastic material, making it possible to clearly separate the treated and non-treated areas by actively exposing only the treated areas. , it is possible to accurately surface-treat only the treated area.

Note that as the material for the rings 3.6.9, 61.76.114, other than rubber, resin having appropriate elasticity may be used. In the embodiment shown in FIG. 2, the juice 1 and closed container 14 may be fixed and the jigs 15 and 16 may be moved 41. FIG. 1 [Here, we have described an example in which two parts are processed at the same time, but the same effect can be obtained in the case of one or three or more parts.

When implementing Figures 2 and 6, we have explained the case where one set of pipe live shells are processed.
Multiple sets of placement jigs can be connected and processed at the same time.
In the case of FIG. 2, a plurality of sealed containers may be set in the same arrangement jig and processed in parallel. In addition, Section 1.6.4.5.7
The figure describes an example in which the inner surface of the sealed container is cylindrical.
．． Of course, suitable IH can be performed even when the part is not cylindrical like the part shown in Fig. 9.

When anodizing the head side 1o125 of the combustion chamber of the cylinder head 124 shown in FIG. 8 or the 11 sides of the air supply and exhaust ports 127 and 128 of the cylinder head 126 of the inner mail 11 shown in FIG. The present invention can be easily adopted by simply changing the shape.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing a closed container of a surface treatment apparatus according to the present invention, FIG. 2 is a conceptual diagram showing a surface treatment apparatus according to the present invention, and FIGS. 3, 4, and 117 are separate views of the closed container, respectively. A vertical sectional front view showing the embodiment of
6 is a conceptual diagram showing another embodiment of the surface treatment apparatus, and FIGS. 8 and 9 are longitudinal sectional front views showing further embodiments. 1.1', 59.75, 115, 12
4゜126...Parts, 3.6.9.61.76.11
4...Ring, 14.73.98.119-・Chemical processing airtight container Fig. 4 Fig. 6

Claims (1)

[Claims] (1) Seal the entire boundary between the treated part and the non-processed part of a part that requires partial chemical surface treatment with a ring of rubber-like elastic material. constitutes the department,
A surface treatment method characterized by performing chemical treatment on a treatment part by filling a closed container for chemical treatment with a treatment liquid. (21) The entire boundary between the treated part and the non-treated part of a part that partially requires chemical surface treatment is sealed with a ring of rubber-like elastic material, and the treated part is filled with all! Chemical treatment 111! 1. A surface treatment device comprising: a part of a 1-piece airtight container;