JPH0635599B2 - Cleaning agent for mold making - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cleaning agent for mold making.

[Conventional technology and problems]

Conventionally, when a mold is manufactured, a resin and sand are mixed, and the mixture is reacted and fixed to the mold. At this time, the reaction product adheres to a model, a metal frame, a kneading sand hopper, etc., and its removal has been a problem conventionally. In particular, when an organic binder such as a furan resin is used as a binder for a mold, there is a problem that the organic binder is often attached. There is also a problem that it is easy to adhere to the vent (air vent) of the mold, which is difficult to clean.

Heretofore, as a method for removing such an adhered substance, a method of physically removing with a hammer, a brush, a shot plast, etc., a method of dissolving and removing with an appropriate solvent, etc. have been proposed.

However, in the case of a mold having a complicated structure, it is difficult to say that it is the best method in the case of a mold having a complicated structure, because a human has to do it manually, which requires labor and time, and is easily scratched. In the solvent method, the removal usually requires one week or more, and often the removal is incomplete, and it is necessary to further brush after the treatment.

Further, JP-A-59-153542 discloses a difficult-to-cast deposit removing agent containing dimethyl sulfoxide and a surfactant such as a fluorine-based surfactant and a hydrocarbon-based anion surfactant. However, this removing agent also cannot sufficiently remove the deposits.

[Means for solving problems]

The present inventors have completed the present invention as a result of intensive research to solve the above conventional problems.

That is, the present invention is a cleaning agent for contaminants attached during mold production, which consists of at least one solvent of the following (a) ~ (e), or at least one of the following (a) ~ (e) With the solvent of
(A) ~ (D) consisting of at least one surfactant, or (a) ~ (e) at least one solvent and the following (A) ~ (D) at least one interface Activator and the following a)
The present invention provides a cleaning agent for producing a mold, which comprises at least one solvent of

(a) R ₁ CN (wherein R ₁ is an alkyl group or an alkenyl group having 1 to 4 carbon atoms).

(b) R ₂ COOH (wherein R ₂ is H or an alkyl group having 1 to 3 carbon atoms or a hydroxyl group-substituted alkyl group).

(c) Halogenated saturated hydrocarbon having 1 to 4 carbon atoms (excluding those having a boiling point of 45 ° C or lower).

(d) R ₃ OCH ₂ CH ₂ OR ₄ (wherein R ₃ is an alkyl group having 1 to 4 carbon atoms, R ₄ is H, an alkyl group having 1 to 4 carbon atoms or an acyl group).

(e) Cyclic ether having 4 to 6 carbon atoms.

(A) (However, R ₆ is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups).

(B) R ₅ OSO ₃ M (where R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups).

(C) (However, R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20).

(D) (However, R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and n ₃ is 1 to 100).

A) An aliphatic ketone having 3 to 8 carbon atoms.

B) An alicyclic ketone having 5 to 8 carbon atoms.

C) Aromatic hydrocarbons having 6 to 12 carbon atoms.

D) A halogenated aromatic hydrocarbon having 6 to 8 carbon atoms.

E) An aliphatic ester having 2 to 8 carbon atoms.

The content of at least one compound (a) to (e), which is the main active ingredient of the detergent of the present invention, is preferably 10% by weight or more. Further, the content of at least one surfactant of (A) to (D) is appropriately in the range of 0.1 to 20% by weight. B) above
The content of at least one solvent of (e) is the balance of the content of at least one solvent of (a) to (e) and at least one surfactant of (A) to (D), but the present invention The cleaning agent may contain some water.

The cleaning agent of the present invention is preferably used for cleaning a model when a mold is manufactured, using a room-temperature self-hardening or gas-curing organic binder as a binder.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Examples 1-2 and Comparative Examples 1-2 Furan resin and organic sulfonic acid-based curing agent are added to silica sand to produce a mold. Furan self-hardening, 30 kg / Bat mixer, 30 kg silica sand, 360 g furan resin, xylene. 150 g of a sulfonic acid type curing agent was added, and the mixture was kneaded for 1 minute and then discharged.

This was repeated 100 times, and a certain amount of the cleaning agent shown in Table 1 was applied to the silica-containing deposits adhering to the mixer and the mixing blades, and the removability and rusting condition, and the curability of the kneaded sand after removal were evaluated.

The results are shown in Table 1.

Examples 3 to 4 and Comparative Examples 3 to 4 Furan resin and an organic sulfonic acid type curing agent are added to silica sand to produce a mold. Furan is self-hardening and 1000 parts by weight of regenerated silica sand,
A mold was produced using 8 parts by weight of furan resin and 4 parts by weight of a toluene sulfonic acid type curing agent. A model for mold production, which was repeatedly molded 50 times, to remove contaminants adhering to the metal frame.
The following cleaning agents were applied, and the removability, rusting, and moldability after cleaning and removal were evaluated.

The results are shown in Table 2.

Claims (5)

[Claims] 1. A cleaning agent for a mold, which is a cleaning agent for contaminants attached during the manufacturing of a mold and is composed of at least one of the following solvents (a) to (e). (a) R ₁ CN (wherein R ₁ is an alkyl group or an alkenyl group having 1 to 4 carbon atoms). (b) R ₂ COOH (wherein R ₂ is H or an alkyl group having 1 to 3 carbon atoms or a hydroxyl group-substituted alkyl group). (c) Halogenated saturated hydrocarbon having 1 to 4 carbon atoms (excluding those having a boiling point of 45 ° C or lower). (d) R ₃ OCH ₂ CH ₂ OR ₄ (wherein R ₃ is an alkyl group having 1 to 4 carbon atoms, R ₄ is H, an alkyl group having 1 to 4 carbon atoms or an acyl group). (e) Cyclic ether having 4 to 6 carbon atoms. 2. The cleaning agent according to claim 1, wherein the content of at least one solvent of (a) to (e) is 10% by weight or more. 3. A cleaning agent for contaminants attached during mold production, comprising at least one solvent of the following (a) to (e) and the following:
A cleaning agent for producing a mold, comprising at least one surfactant of (A) to (D). (a) R ₁ CN (wherein R ₁ is an alkyl group or an alkenyl group having 1 to 4 carbon atoms). (b) R ₂ COOH (wherein R ₂ is H or an alkyl group having 1 to 3 carbon atoms or a hydroxyl group-substituted alkyl group). (c) Halogenated saturated hydrocarbon having 1 to 4 carbon atoms (excluding those having a boiling point of 45 ° C or lower). (d) R ₃ OCH ₂ CH ₂ OR ₄ (wherein R ₃ is an alkyl group having 1 to 4 carbon atoms, R ₄ is H, an alkyl group having 1 to 4 carbon atoms or an acyl group). (e) Cyclic ether having 4 to 6 carbon atoms. (A) (However, R ₆ is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (B) R ₅ OSO ₃ M (where R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (C) (However, R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20). (D) (However, R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and n ₃ is 1 to 100). 4. The cleaning agent according to claim 3, wherein the content of at least one surfactant of (A) to (D) is 0.1 to 20% by weight. 5. A cleaning agent for contaminants attached during mold production, comprising at least one of the following solvents (a) to (e) and the following:
(A) to (D) at least one surfactant and the following a)
A cleaning agent for producing a mold, comprising at least one solvent of (a) R ₁ CN (wherein R ₁ is an alkyl group or an alkenyl group having 1 to 4 carbon atoms). (b) R ₂ COOH (wherein R ₂ is H or an alkyl group having 1 to 3 carbon atoms or a hydroxyl group-substituted alkyl group). (c) Halogenated saturated hydrocarbon having 1 to 4 carbon atoms (excluding those having a boiling point of 45 ° C or lower). (d) R ₃ OCH ₂ CH ₂ OR ₄ (wherein R ₃ is an alkyl group having 1 to 4 carbon atoms, R ₄ is H, an alkyl group having 1 to 4 carbon atoms or an acyl group). (e) Cyclic ether having 4 to 6 carbon atoms. (A) (However, R ₆ is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (B) R ₅ OSO ₃ M (where R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (C) (However, R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20). (D) (However, R ₅ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and n ₃ is 1 to 100). A) An aliphatic ketone having 3 to 8 carbon atoms. B) An alicyclic ketone having 5 to 8 carbon atoms. C) Aromatic hydrocarbons having 6 to 12 carbon atoms. D) A halogenated aromatic hydrocarbon having 6 to 8 carbon atoms. E) An aliphatic ester having 2 to 8 carbon atoms.