WO2008148255A1

WO2008148255A1 - Method for making pressure vessel by nickel electrofoming

Info

Publication number: WO2008148255A1
Application number: PCT/CN2007/002483
Authority: WO
Inventors: Chichun Wu; Chungho Chen
Original assignee: Chichun Wu; Chungho Chen
Priority date: 2007-06-04
Filing date: 2007-08-17
Publication date: 2008-12-11
Also published as: CN101319338A

Abstract

A method for making pressure vessel by nickel electroforming, which includes the preparation of the mandrel, producing the copy by electrodeposition and removing the mandrel. The bath used in the electrodeposition is composed of 60-120 parts by weight of nickel sulphamate, 10-40 parts by weight of boric acid, 2-6 parts by weight of sulfamic acid, 2-6 parts by weight of nickel carbonate, 2-6 parts by weight of nickel chloride and 1000 parts by weight of water. The electrodeposition is carried out at the pH of 3.50-4.8 , the temperature is 45-70°C, the voltage and the current density are 12-15 VDC and 0.5-6.0ASD respectively. The present method is simple and does not require too much apparatus , thus it can save the producing cost and is more applicable.

Description

Method for manufacturing pressure vessel by metal nickel electroforming

The present invention relates to a method of manufacturing a container, and more particularly to a method of manufacturing a pressure vessel. Background technique

In daily life, people often use containers that can withstand certain pressures. A gas tank for an air rifle used for shooting sports. The pressure vessel is formed by deep drawing of a sheet of metal material into a metal liner. The can is processed on the inner liner, and then the outer surface of the inner liner is tightly wrapped with a fiber thermosetting resin composite material to increase the pressure resistance of the inner liner.

The key to the manufacture of such containers is the deep drawing of the liner. The process of deep drawing is a gradual process, and the amount of deep drawing stretching per time cannot be too large, otherwise it is easy to pull and tear. At the same time, each stretching is performed by annealing heat treatment to eliminate the processing stress. Therefore, the overall stretch forming of the inner casing is complicated, the cost is high, and the work efficiency is good.

It can be seen that the above-mentioned existing pressure vessels are obviously still inconvenient and defective in the manufacturing method and use, and further improvement is urgently needed. In order to solve the problems existing in the prior art, the relevant manufacturers do not bother to find a solution, but the design that has not been applied for a long time has been developed, and the general manufacturing method has no suitable method to solve the above problem. It is an issue that the relevant industry is anxious to solve. .

Electroforming is one of the electrodeposition techniques. It mainly includes: selection of core material and design of the core mold. The core mold is a specially designed electroforming model. The core mold can be made into the same shape by electroforming. The surface modification treatment of the core mold, such as plating the separation layer or the electrification layer on the surface of the core mold; making a copy of the electrodeposition, (copy is a semi-finished product obtained after electrodeposition on the surface of the core mold) including the configuration of the electrolyte ( The concentration of components and impurities), current density, temperature, degree of agitation, etc.; demoulding or no demoulding; mechanical processing steps.

Metal nickel is a commonly used metal in electroforming. When electrolyzing nickel, the electrolyte is usually selected from a nickel sulfate electrolyte and a sulfamate nickel plating electrolyte.

In view of the defects of the above-mentioned existing containers in the manufacturing method and use, the inventors actively research and innovate based on the practical experience and professional knowledge of designing and manufacturing such products, in order to create a new method, capable of creating a new method. The method of improving the conventional pressure vessel is more practical. After continuous research and design, and after repeated trials and improvements, the present invention has finally been created with practical value. Summary of the invention The main object of the present invention is to overcome the existing defects in the method for manufacturing a pressure vessel, and to provide a new method for manufacturing a pressure vessel by metal nickel electroforming. The technical problem to be solved is that it is simple and convenient to manufacture, and does not need to be Too many devices save manufacturing costs and are therefore more suitable for practical use.

The object of the present invention and solving the technical problems thereof are achieved by the following technical solutions. A method for manufacturing a pressure vessel by metal nickel electroforming according to the present invention, comprising the steps of preparing a core mold, manufacturing a copy, demolding, and winding a fiber; wherein the electrodeposition bath used in the manufacturing copying step is prepared as follows: Nickel sulfamate: 60-120 parts by weight; boric acid: 10-40 parts by weight; sulfamic acid: 2-6 parts by weight; nickel carbonate: 2-6 parts by weight; nickel chloride: 2-6 parts by weight; 1000 parts by weight; wherein the working conditions of the electrodeposition bath are: PH value: 3. 50-4. 80, working temperature: 45-70 ° C, working voltage: 12-15 VDC, current density: 0. 5- 6 . 0ASD.

The object of the present invention and solving the technical problems thereof can be further achieved by the following technical measures. The aforementioned method, wherein the core mold is a paraffin core mold or a blow core mold coated with a conductive layer. The aforementioned method, wherein the conductive layer is a graphite layer or a conductive paint.

The foregoing method, wherein the step of manufacturing the copy further comprises the step of inserting the can which is processed with the metal bar into the mandrel.

The aforementioned method, wherein the step of winding the fibers uses a binder to fix the fibers. The aforementioned method, wherein the binder material is an unsaturated polyester resin, an epoxy resin, a crepe resin, a phenol resin or other resin.

The aforementioned method, wherein the fiber is carbon fiber, glass fiber or polyamide fiber.

With the above technical solution, the method for manufacturing a pressure vessel by the metal nickel electroforming method of the present invention has at least the following advantages:

1. Easy to manufacture, no need for too much equipment, saving manufacturing costs.

2. The container manufactured by the manufacturing method of the invention has the advantages of abrasion resistance, high strength, resistance to falling, strong heat preservation and light weight.

3. The shape and specification of the container manufactured by the manufacturing method of the present invention are arbitrarily changed. Only by changing the shape and size of the core mold, the product of the corresponding shape and size can be obtained, and it is especially suitable for manufacturing a container with complicated geometry.

The invention has the above-mentioned many advantages and practical values, and has great improvements in manufacturing methods and functions, has significant advances in technology, and has produced useful and practical effects, and is more than the existing metal. The nickel electroforming method for manufacturing a pressure vessel has a plurality of enhanced effects, thereby being more suitable for practical use and having a wide range of industrial use values, and is a novel, progressive and practical new design.

The above description is only an overview of the technical solutions of the present invention, and the technical means of the present invention can be more clearly understood, and can be implemented in accordance with the contents of the specification, and the above and other objects, features and advantages of the present invention can be more clearly understood. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings. DRAWINGS

Figure 1 is a schematic illustration of an electrodeposition fabrication copy. detailed description

In order to further explain the technical means and efficacy of the present invention for achieving the intended purpose of the present invention, a specific embodiment of a method for manufacturing a pressure vessel by metal nickel electroforming according to the present invention will be described below with reference to the accompanying drawings and preferred embodiments. , methods, procedures, features and their effects, as detailed below.

Please refer to Figure 1 for the following examples.

Example 1

First, the preparation of the core mold

Step 1: The can 3 is made of a metal rod. In this embodiment, a copper rod is used, but is not limited thereto; Step 2: casting a core mold with a low melting wax, in this embodiment, the shape of the core mold is a cylindrical can body. The length is 100 mm.

Step 3: The processed can 3 is mounted on the paraffin core mold 5.

Step 4: Evenly apply 4 layers of graphite powder on the outer surface of paraffin core mold 5. The technical requirements of graphite powder layer are as follows:

a. Particle size: 1-20 microns

b. Thickness: 0.2- 0.4 mm

c. Conductivity: Resistance 0.5Ω

Second, the preparation of electrodeposition bath 6

1, bath components:

a. Amino acid nickelate [Ni(S0 ₃ ·ΝΗ ₃ ) ·4Η ₂ 0] 120g

Impurity element control: Fe<2.0PPM, Cu<0.1PPM, Zn<0.1PPM

b. Boric acid [H ₃ B0 ₃ ] 40 g

Impurity element control: Fe<2. OPPM

c. sulfamic acid: [S0 ₃ -NH ₃ ] 2 g

Impurity element control: Fe<2.0PPM

d. Nickel carbonate [NiC0 ₃ ] 6 g

Control of impurity elements: Pb<0.05%, Cu<0.05%, Zn<0.06% CKO.03% e. Nickel chloride [NiCl ₂ ] 2 g

Impurity element control: Fe<2. OPPM, Cu<4. OPPM, Na<30PPM, Pb<l. OPPM, Zn<30PPM

f. Pure water: 1L Resistance value ≥1⁄2 Μ _Ω

2. Working conditions of bath:

a. Depreciation: 3. 50

b. Working temperature: 70 ° C

c. Working voltage: 15VDC

d. Current density: 6. 0ASD

Third, metal nickel plate 7

1. Suspend the metal nickel plate 7 on the four sides and the bottom of the tank 8 filled with the liquid bath, and connect the positive electrode of the DC power source.

2. Technical conditions of metal nickel plate:

a. Purity: > 99..9%

b. Voltage: 15VDC

Fourth, electrolytic deposition

Step 1. The paraffin core mold 5 coated with the graphite powder 4 is immersed in the bath 6 as a whole, and is connected to the negative electrode of the direct current power source, and is also connected to the deceleration rotating device 9.

Step 2. Turn on the power, and the paraffin core mold is rotated in the bath 6 at a speed of 3-10 rpm for 1 hour. At this time, the metal nickel plate 7 is cracked into a metal nickel particle having a particle size of 40-60 nm by the action of a current, and is deposited on the 4 layers of the graphite powder of the paraffin core mold 5 by the bridge action of the bath 6. As the thickness of the deposit increases, the nano-sized nickel metal dust particles gradually form a liner that conforms to the shape and size of the paraffin core mold and is integrated with the can.

5. Wound fiber thermosetting resin composite material.

The reinforcing fibers which are ordered and coated with a thermosetting resin are wound at 90 degrees in the axial direction of the container, and are entangled as the first layer.

Rotate clockwise 45 degrees and then wrap it in order. Apply the reinforcing fiber of the thermosetting tree to the second layer.

The method of winding the second layer continues to wind the third layer and the fourth layer.

6毫米。 According to the design pressure of the container, the calculation of the need to wrap the reinforcing fibers, according to the design pressure of the container, the winding of the reinforcing fibers of the unit is completed. The number of units.

Carbon fiber and epoxy resin were used, and the curing temperature was 130 ± 5 °C, and four units were wound.

Design pressure is greater than l OMpa (mainly for containers with higher pressure)

Hydraulic test pressure = 1. 5 times design working pressure

Finished product

1. The paraffin core mold is melted by means of hot melt (paraffin can be used repeatedly).

2. Remove the graphite powder layer by mechanical or manual means. Example 2: Preparation with a blown mandrel

First, the preparation of blow molding mandrel

1. Prepare a cylindrical blow molding mandrel with a length of 100 mm

2. Evenly apply conductive paint on the outer surface of the blow molding mandrel. The technical requirements are as follows:

Conductivity: Resistance 0.5Ω

Second, the preparation of electrodeposition bath

1, bath components:

a. Nickel sulfamate [Ni(S0 ₃ ·ΝΗ ₃ ) ·4Η ₂ 0] 60g

Impurity element control: Fe<2, OPPM, Cu<0.1PPM, Zn<0.1PPM b. Boric acid [H ₃ B0 ₃ ] 10g

Impurity element control: Fe<2. OPPM .

c. Amino acid: [S0 ₃ -NH ₃ ] 6 g

Impurity element control: Fe<2. OPPM

d. Nickel carbonate [NiCOj ' 2g

Control of impurity elements: Pb<0.05%, Cu<0.05%, Zn<0.06% CKO.03% e. Nickel chloride [NiCl ₂ ] 6 g

Impurity element control: Fe<2. OPPM, Cu<4. OPPM, Na<30PPM, Pb<l. OPPM

Zn<30PPM

f. Pure water: 1L

2. Working conditions of bath:

a. PH value: 4.80

b. Working temperature: 45. C

c. Working voltage: 12VDC

d. Current density: 0.5ASD

Third, metal nickel plate

Same as Embodiment 1.

Fourth, electrolytic deposition

Same as Embodiment 1.

5. Wound fiber thermosetting resin composite material.

Glass fiber and phenolic resin were used, and the curing temperature was 80 ± 5 ° C, and one unit was wound. Mainly suitable for lower pressure vessels Design pressure < 1 OMpa

Hydraulic test pressure = 1.5 times design working pressure

, ^^品

Same as Example 1. Example 3

1, bath components:

a. Amino acid nickelate [Ni (S0 ₃ · ΝΗ ₃ ) · 4Η ₂ 0] 90 g

Impurity element control: Fe<2. OPPM, Cu<0. 1PPM, Zn<0. 1PPM

b. - Boric acid [H ₃ B0 ₃ ] 25 g /

Impurity element control: Fe<2. OPPM

c. sulfamic acid: [S0 ₃ . NH ₃ ] 4 g

Impurity element control: Fe<2. OPPM

d. Nickel carbonate [NiCOJ 3. 5g

Impurity element control: Pb<0. 05%, Cu<0. 05%, Zn<0. 06 % CKO. 03% e. Nickel chloride [NiCl ₂ ] 4. 5 g

Impurity element control: Fe<2. 0PPM, Cu<4. OPPM, Na<30PPM, Pb<l. OPPM,

Zn<30PPM

f. Pure water: 1L

2. Working conditions of bath:

a. PH value: 4

b. Working temperature; 60. C

c. Working voltage: 13VDC

d. Current density: 2. 5ASD

3, the remaining steps are the same as the embodiment 1

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, any The skilled person can make some modifications or modifications to the equivalent embodiments by using the technical content disclosed above without departing from the technical scope of the present invention, but without departing from the technical solution of the present invention, according to the present invention. Technical Substantials Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the technical solutions of the present invention. Industrial applicability

The method for manufacturing a pressure vessel by the metal nickel electroforming method is simple and convenient, does not require too much equipment, and saves manufacturing cost; the container manufactured by the manufacturing method of the invention has abrasion resistance, high strength, resistance to falling, strong heat preservation and light weight Advantages; The shape and specification of the container manufactured by the manufacturing method of the invention are arbitrarily changed, and only the shape and size of the mandrel can be changed to obtain a product of a corresponding shape and size, and is particularly suitable for manufacturing a container having a complicated geometry.

Claims

Claim

A method for producing a pressure vessel by metal nickel electroforming, comprising the steps of: preparing a core mold, manufacturing a copy, demolding, and winding a fiber; wherein the electrodeposition bath used in the manufacturing copying step is prepared as follows :

Nickel sulfamate: 60-120 parts by weight;

Boric acid: 10-40 parts by weight;

Aminosulfonic acid: 2-6 parts by weight;

Nickel carbonate: 2-6 parts by weight;

Nickel chloride: 2- 6 parts by weight; and

Water: 1000 parts by weight;

The working condition of the electrodeposition bath is: PH value: 3. 50-4. 80, working temperature: 45-70 ° C, working voltage: 12- 15 VDC, current density: 0. 5-6. 0 ASD.

A method of manufacturing a pressure vessel by metal nickel electroforming according to claim 1, wherein said core mold is a paraffin core mold or a blow core mold coated with a conductive layer.

A method of manufacturing a pressure vessel by metal nickel electroforming according to claim 2, wherein said conductive layer is a graphite layer or a conductive paint.

A method of manufacturing a pressure vessel by metal nickel electroforming according to claim 1, wherein the step of manufacturing a copy further comprises the following steps:

A can made of a metal bar is attached to the mandrel.

A method of manufacturing a pressure vessel by metal nickel electroforming according to claim 1, wherein the fiber is fixed using a binder material in the step of winding the fiber.

A method of manufacturing a pressure vessel by metal nickel electroforming according to claim 5, wherein said binder material is an epoxy resin, a garnet resin or a phenol resin.

A method of manufacturing a pressure vessel by metal nickel electroforming according to claim 5 or claim 6, wherein the fiber is carbon fiber, glass fiber or polyamide fiber.