Adhesive for metal powder injection molding and preparation method thereof

Abstract

The invention relates to the technical field of metal powder injection molding, and discloses an adhesive for metal powder injection molding, which comprises the following components by weight percentage: polyethylene glycol 50wt%~65wt%, plasticizer 30wt%~45wt %, stearic acid 4wt%~6wt%, sodium o-sulfonylbenzimide 0.1wt%~0.2wt%. Also disclosed is a preparation method of the above-mentioned adhesive for metal powder injection molding, which can improve the mechanical properties of injection molding parts.

Description

technical field

[0001] The invention relates to the technical field of metal powder injection molding, in particular to an adhesive for metal powder injection molding and a preparation method thereof. Background technique

[0002] In recent years, the technology of preparing metal powder has advanced by leaps and bounds, and the near-net shape technology has risen rapidly. Metal powder injection molding technology (Metal Powder Injection Molding Technology, referred to as MIM) has also developed accordingly. , sintering, post-processing and other processes to quickly manufacture structural parts with high density, high precision, and three-dimensional complex shapes, which can be mass-produced. Metallurgical products have the disadvantages of uneven material, low mechanical properties, thin walls and complex structures, and are especially suitable for mass production of small, complex and special metal parts.

[0003] However, at present, only a small part of metal powder i...

Examples

Embodiment 1

[0064] An adhesive for metal powder injection molding, its weight is 100kg, and it is composed of the following components in terms of weight percentage: polyethylene glycol 59wt%, plasticizer (polymethyl methacrylate) 34.8wt%, hard Fatty acid 6wt%, o-sulfonyl benzimide sodium 0.2wt%.

[0065] The preparation method of the adhesive for the above-mentioned metal powder injection molding, the method steps are as follows:

[0066] Step 1. Melt a certain amount of polyethylene glycol at a constant temperature of 170°C; choose an oil bath constant temperature stirring pot for constant temperature equipment.

[0067] Step 2. Add materials to the step 1 in three batches, stir evenly after feeding in each batch and let stand for a certain period of time; add a certain amount of plasticizer in the first batch, stir evenly, and let stand for 30 minutes, the second batch Add a certain amount of stearic acid for the first time, stir evenly, and let stand for 30 minutes; add a certain amo...

Embodiment 2

[0072] An adhesive for metal powder injection molding in this embodiment has a weight of 100kg and is composed of the following components in terms of weight percentage: polyethylene glycol 50wt%, plasticizer (polypropylene) 45wt%, hard 4.85wt% fatty acid, 0.15wt% sodium o-sulfonylbenzimide.

[0073] The preparation method of the adhesive for the above-mentioned metal powder injection molding, the method steps are as follows:

[0074] Step 1. Melt a certain amount of polyethylene glycol at a constant temperature of 170°C; choose an oil bath constant temperature stirring pot for constant temperature equipment.

[0075] Step 2: Add materials to the step 1 in three batches, stir evenly after feeding each batch and let it stand for a certain period of time; add a certain amount of plasticizer in the first batch, stir evenly, let stand for 20min, the second batch Add a certain amount of stearic acid for the first time, stir evenly, and let stand for 30 minutes; add a certain amoun...

Embodiment 3

[0080] A metal powder injection molding adhesive in this embodiment has a weight of 100kg, and is composed of the following components in terms of weight percentage: polyethylene glycol 52wt%, plasticizer (polypropylene and polymethacrylic acid Methyl ester, its mass ratio is 1:1) 43.8wt%, stearic acid 4wt%, o-sulfonyl benzimide sodium 0.2wt%.

[0081] The preparation method of the adhesive for the above-mentioned metal powder injection molding, the method steps are as follows:

[0082] Step 1. Melt a certain amount of polyethylene glycol at a constant temperature of 170°C; choose an oil bath constant temperature stirring pot for constant temperature equipment.

[0083] Step 2: Add materials to the step 1 in three batches, stir evenly after feeding each batch and let it stand for a certain period of time; add a certain amount of plasticizer in the first batch, stir evenly, let stand for 20min, the second batch Add a certain amount of stearic acid for the first time, stir even...

technical field

[0001] The invention relates to the technical field of metal powder injection molding, in particular to an adhesive for metal powder injection molding and a preparation method thereof. Background technique

[0002] In recent years, the technology of preparing metal powder has advanced by leaps and bounds, and the near-net shape technology has risen rapidly. Metal powder injection molding technology (Metal Powder Injection Molding Technology, referred to as MIM) has also developed accordingly. , sintering, post-processing and other processes to quickly manufacture structural parts with high density, high precision, and three-dimensional complex shapes, which can be mass-produced. Metallurgical products have the disadvantages of uneven material, low mechanical properties, thin walls and complex structures, and are especially suitable for mass production of small, complex and special metal parts.

[0003] However, at present, only a small part of metal powder i...

Examples

Embodiment 1

[0064] An adhesive for metal powder injection molding, its weight is 100kg, and it is composed of the following components in terms of weight percentage: polyethylene glycol 59wt%, plasticizer (polymethyl methacrylate) 34.8wt%, hard Fatty acid 6wt%, o-sulfonyl benzimide sodium 0.2wt%.

[0065] The preparation method of the adhesive for the above-mentioned metal powder injection molding, the method steps are as follows:

[0066] Step 1. Melt a certain amount of polyethylene glycol at a constant temperature of 170°C; choose an oil bath constant temperature stirring pot for constant temperature equipment.

[0067] Step 2. Add materials to the step 1 in three batches, stir evenly after feeding in each batch and let stand for a certain period of time; add a certain amount of plasticizer in the first batch, stir evenly, and let stand for 30 minutes, the second batch Add a certain amount of stearic acid for the first time, stir evenly, and let stand for 30 minutes; add a certain amo...

Embodiment 2

[0072] An adhesive for metal powder injection molding in this embodiment has a weight of 100kg and is composed of the following components in terms of weight percentage: polyethylene glycol 50wt%, plasticizer (polypropylene) 45wt%, hard 4.85wt% fatty acid, 0.15wt% sodium o-sulfonylbenzimide.

[0073] The preparation method of the adhesive for the above-mentioned metal powder injection molding, the method steps are as follows:

[0074] Step 1. Melt a certain amount of polyethylene glycol at a constant temperature of 170°C; choose an oil bath constant temperature stirring pot for constant temperature equipment.

[0075] Step 2: Add materials to the step 1 in three batches, stir evenly after feeding each batch and let it stand for a certain period of time; add a certain amount of plasticizer in the first batch, stir evenly, let stand for 20min, the second batch Add a certain amount of stearic acid for the first time, stir evenly, and let stand for 30 minutes; add a certain amoun...

Embodiment 3

[0080] A metal powder injection molding adhesive in this embodiment has a weight of 100kg, and is composed of the following components in terms of weight percentage: polyethylene glycol 52wt%, plasticizer (polypropylene and polymethacrylic acid Methyl ester, its mass ratio is 1:1) 43.8wt%, stearic acid 4wt%, o-sulfonyl benzimide sodium 0.2wt%.

[0081] The preparation method of the adhesive for the above-mentioned metal powder injection molding, the method steps are as follows:

[0082] Step 1. Melt a certain amount of polyethylene glycol at a constant temperature of 170°C; choose an oil bath constant temperature stirring pot for constant temperature equipment.

[0083] Step 2: Add materials to the step 1 in three batches, stir evenly after feeding each batch and let it stand for a certain period of time; add a certain amount of plasticizer in the first batch, stir evenly, let stand for 20min, the second batch Add a certain amount of stearic acid for the first time, stir even...