WO1994014556A1 - Stock solution of parting compound for green sand molding - Google Patents
Stock solution of parting compound for green sand molding Download PDFInfo
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- WO1994014556A1 WO1994014556A1 PCT/JP1993/001892 JP9301892W WO9414556A1 WO 1994014556 A1 WO1994014556 A1 WO 1994014556A1 JP 9301892 W JP9301892 W JP 9301892W WO 9414556 A1 WO9414556 A1 WO 9414556A1
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- release agent
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- green
- mold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/082—Inorganic acids or salts thereof containing nitrogen
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- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/082—Inorganic acids or salts thereof containing nitrogen
- C10M2201/083—Inorganic acids or salts thereof containing nitrogen nitrites
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- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
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Definitions
- the present invention relates to a stock solution for a green mold release agent and a mold release agent for a green mold containing a hydrocarbon-based oil as a main agent for mold release action.
- the green mold the most primitive of mold ⁇ , has better molding productivity compared to other thermosetting, self-curing, and gas-curable molds. It is still the mainstream type because it can be used repeatedly.
- a water-in-oil type (WZO type) comprising a surfactant as a dispersant and a water phase dispersed in a hydrocarbon-based oil phase from the same person as the present applicant.
- WZO type water-in-oil type
- An emulsion type is proposed (see Japanese Patent Publication No. Sho 63-296625).
- the emulsion cannot be diluted with water because it is a water-in-oil (WZO) type. For this reason, it was necessary to adjust the composition from the time of manufacture to the time of use, and transportation and storage were troublesome.
- WZO water-in-oil
- the water content was limited to about 60%, which was not necessarily sufficient in terms of resource saving and fire safety.
- the release agent may be an oil-in-water (OZW) emulsion, but it has been difficult to form a uniform release film on the surface of the mold after being used for molding.
- OZW oil-in-water
- the main agent of the mold release action is hydrocarbon oil, so the mold after the mold release agent is applied and used for molding This is because oil remains on the surface of the mold (particularly the mold), and the water-based ozw emulsion release agent is repelled when applied to the mold surface.
- An object of the present invention is to provide a stock solution for a mold release agent for a green mold, which can be used in the form of a 0 / W emulsion after being diluted with water at the time of use.
- Another object of the present invention is to provide a stock solution of a mold release agent for green molding that can be used in the form of an aqueous solution and does not require the use of hydrocarbon oil.
- One of the green mold release agent stock solutions of the present invention is a green mold release agent stock solution containing a hydrocarbon-based oil as a mold release agent, and
- a surfactant as a dispersant and (2) an anionic surfactant and a no or strongly basic amine as a wetting improver are included as essential components, and diluted with water to form an oil-in-water type.
- the wettability of the mold when used as a release agent is improved, so that the surface of the mold (particularly the mold) after the release agent is applied and used for molding is improved. Even if oil remains, it is not repelled when applied to the mold surface, a uniform release film can be formed on the mold surface, and the release agent can be applied in the form of an OZW emulsion.
- the stock solution of the release agent of the present invention can be diluted with water.
- the ratio of water to hydrocarbon-based oil can be relatively increased (to 60% or more), and resource saving and resistance can be achieved. It contributes to improving fire safety. .
- Another one of the stock solutions of the mold release agent for green mold of the present invention is a stock solution of the mold release agent for green mold, which comprises a strong basic amine, a higher fatty acid, and ethylene glycol or ethylene glycol.
- the above-mentioned second object is achieved by the constitution characterized in that the compounds are used as essential components, and are appropriately diluted with water and used in the form of an aqueous solution, thereby achieving the following functions and effects.
- the release agent stock solution of the present invention is dilutable with water, so that it is not bulky during storage / transportation, easy to store / transport, and the release agent composition at the time of application. Does not use hydrocarbon oils at all, contributing to resource saving and improved fire safety
- FIG. 1 is a schematic diagram of a squeeze molding method for performing a releasability test or the like.
- the stock solution for mold release of the present invention contains a hydrocarbon-based oil as a base material for mold release operation.
- a hydrocarbon oil a petroleum oil having a flash point of 55 ° C or more is usually preferable from the viewpoint of handling.
- Specific examples include gear oils, machine oils, bearing oils, lubricating oils such as turbine oils, and kerosene and light oils. These can be used alone or in combination.
- the surfactant as a dispersing agent may be any of nonionic, anionic, and cationic amphoteric surfactants.
- the following nonionic surfactants are used in oil-in-water at the time of use. It is desirable from the viewpoint of liquid stability of the drop (0 / W) emulsion.
- Alkylpolyoxyethylene ether Alkylcarbonyl oxypolyoxyethylene, P-alkylphenylpolyoxyethylene ether, N N-di (polyoxyethylene) alkaneamide, Fatty acid polyhydric alcohol ester, Fatty acid polyhydric alcohol polyoxyethylene
- the ethylene oxide adduct of styrene, a fatty acid sucrose ester, and castor oil The composition ratio of the surfactant as the dispersant is 1 to 50 parts with respect to 100 parts of the hydrocarbon oil (desirable). Is 2 to 30 parts). If the amount is less than 1 part, it is difficult to prepare an OZW emulsion, and if it exceeds 50 parts, the effect does not increase in proportion to the amount.
- anionic surfactant and the strongly basic amine as the wetting improver include the following.
- Anionic surfactant Higher fatty acid alkali salts (soap), sodium alkyl sulfate, sodium 2-alkyl sodium sulfate, sodium alkyl benzene sulphonate, ⁇ -sodium refine sulphonate, sodium succinate amino , Sodium alkylnaphthalene, ⁇ - (2-sulfo) ethyl ⁇ -methylalkaneamidonatonium ', 2-alkylsulfosuccinate dialkylamide.
- composition ratio of the anionic surfactant and / or the strongly basic amine as the wettability improver is 1 to 100 parts (preferably 2 to 80 parts) with respect to 100 parts of the hydrocarbon oil. Part). If the amount is less than 1 part, it is difficult to improve the wettability of the release agent to the mold. On the other hand, if it exceeds 100 parts, the effect does not increase in proportion to the amount.
- the total amount of the anionic surfactant and the surfactant as a dispersant is 2 to 80 parts.
- the anion nonion is set to ⁇ ⁇ ⁇ (preferably 4 6 to 8 2).
- Examples of higher fatty acids include stearic acid, palmitic acid, and oleic acid having 0.8 to 20 carbon atoms, and examples of derivatives include ester / amide derivatives thereof.
- the mixing amount of the mold release aid is 2 to 40 parts with respect to 100 parts of the hydrocarbon-based oil. You.
- the addition of water is a conventional method for facilitating natural emulsification.
- the core of the OZW type emulsion is formed in the release agent composition in advance, and the emulsification at the time of dilution with water, which will be described later, can be performed. It will be easier.
- the amount of water to be added is 1Z10 to the total amount of the hydrocarbon oil and the surfactant;
- the stock solution of the mold release agent for green molding of the present invention contains a strongly basic amine, a higher fatty acid, and phenol or ethylene glycol as essential components.
- Examples of the higher fatty acids include oleic acid, linoleic acid, lauric acid, palmitic acid, stearic acid and the like having 8 to 20 carbon atoms. Amide derivatives may be mentioned.
- the blending amount of the higher fatty acid with respect to 100 parts of the basic amine of the higher fatty acid is 10 to 50 parts, preferably 20 to 40 parts.
- Higher fatty acids act as barrier agents to avoid contact between sand and molds.
- ethylene glycols examples include ethylene glycol, diethylene dalicol, triethylene glycol, and the like.
- the amount of the ethylene glycol to be added to 100 parts of the basic amine is 20 to 80 parts, preferably 30 to 60 parts.
- Ethylene glycols when used as an aqueous solution, act as a lubricant (2)
- a surfactant is used in an amount of 30% or less, preferably 15% or less of the higher fatty acid compounding amount. Is desirably added.
- Non-ions • Anions ⁇ Cations ⁇ Zwitterionics may be used, but anions are particularly preferable from the viewpoint of improving the wettability of the aqueous solution
- anionic surfactant those exemplified in the first invention can be used.
- the stock solution of the release agent of the present invention does not become bulky during storage-transportation, and is easy to store and transport.
- the ratio of water to hydrocarbon-based oil can be relatively increased (to 60% or more), or since hydrocarbon-based oil is not used at all, It contributes to resource saving and improvement of fire safety.
- the release agent prepared by diluting each stock solution of each release agent with water by the above method is used by applying it to a model or the like when forming a green mold.
- Applicable models are not limited to metal models (iron / copper alloy / aluminum alloy / steel, etc.) but may be any type such as plastic type (epoxy resin etc.), plaster type, wood type.
- the application method is usually spray coating. It is optional such as brush coating and dip coating.
- the application amount of the release agent is usually 20 to 400 ml / m 2 .
- molding is continuously performed by various molding methods such as squeeze, gilt, profiling and sand slinger.
- Examples 1 to 10 and Comparative Example 1 a mixture of the formulation shown in Table 1 was manually stirred with a glass rod in a beaker to prepare a stock solution of a releasing agent.
- a mold release agent was prepared by adding the mixture with manual stirring using a glass rod as described above.
- Comparative Example 2 is a commercially available shell mold release agent having the following composition.
- Examples A to H and Comparative Examples 3 and 4 are mixtures of the formulation shown in Table 2. Was manually stirred with a glass rod in a beaker to prepare a stock solution of each release agent.
- a mold release agent was prepared by adding the mixture with manual stirring using a glass rod as described above.
- green sand material 3 having a water content of 3.5% was put into the inner surface of the metal model 1 and squeeze molding was performed using the squeeze head 5.
- the molding conditions were as follows: green sand input: 80 g, squeeze pressure: 980 kPa, molding height: about 13 mm. Then, the following items were tested.
- the metal model was inverted and dropped vertically from a height of 1 Ocm, and the molded green mold was released from the metal model 1. The degree of adhesion of the green sand to the metal model 1 at that time was visually determined. Then, the molding was repeated, and the continuous release property (release property after 6 times molding) was determined together with the initial release property.
- the evaluation criteria are as follows.
- the evaluation criteria are as follows. .
- Tables 3 and 4 show the test results of groups 1 and 2, respectively.
- each Example of Group 1 is superior to Comparative Example 1 (containing no wetting improver) and Comparative Example 2 (commercially available mold release agent for Schulmold). It can be seen that not only the releasability but also the continuous releasability is good.
- the mold release agent of Example 1 was used to mold a case such as a differential case on a green sand molding machine in an actual food factory.However, 30 to 40 shots were used for molding, etc. Molding was possible without occurrence of molding defects.
- each of the examples in Group 2 is superior to Comparative Example 3.4, and it can be seen that not only the initial releasability but also the sustained releasability are good.
- Sorbitan monooleate 0.5 0.5 0.5 0.5 0.33 0.5 0.5 0.5 0.5 0.5 0.5 Poly 0.5 x 0.5
- Emulsion nucleating agent Emulsion nucleating agent
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Description
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94903069A EP0628366A4 (en) | 1992-12-28 | 1993-12-27 | MOTHER SOLUTION OF A MOLD LUBRICANT FOR GREEN SAND MOLDING. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4/348185 | 1992-12-28 | ||
JP4348185A JPH06234990A (ja) | 1992-12-28 | 1992-12-28 | 生型造型用離型剤原液 |
JP5/84715 | 1993-04-12 | ||
JP8471593A JPH06292939A (ja) | 1993-04-12 | 1993-04-12 | 生型造型用離型剤原液 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994014556A1 true WO1994014556A1 (en) | 1994-07-07 |
Family
ID=26425702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/001892 WO1994014556A1 (en) | 1992-12-28 | 1993-12-27 | Stock solution of parting compound for green sand molding |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA2129667A1 (ja) |
WO (1) | WO1994014556A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6329625B2 (ja) * | 1979-07-17 | 1988-06-14 | Tetora Kk | |
JPH02235544A (ja) * | 1989-03-10 | 1990-09-18 | Yushiro Chem Ind Co Ltd | ダイカスト用水溶性離型剤 |
-
1993
- 1993-12-27 WO PCT/JP1993/001892 patent/WO1994014556A1/ja not_active Application Discontinuation
- 1993-12-27 CA CA002129667A patent/CA2129667A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6329625B2 (ja) * | 1979-07-17 | 1988-06-14 | Tetora Kk | |
JPH02235544A (ja) * | 1989-03-10 | 1990-09-18 | Yushiro Chem Ind Co Ltd | ダイカスト用水溶性離型剤 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0628366A4 * |
Also Published As
Publication number | Publication date |
---|---|
CA2129667A1 (en) | 1994-07-07 |
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