Titanium Alloy Pistol Trigger Metal Injection Molding Parts

A processing method for making firearm parts by metal powder injection molding.

The gun frame, trigger, bolt handle, rear sight and other parts in the firearm are usually manufactured by machining methods, which have many processes, large processing volume, high material loss and high cost.

The purpose of the present invention is to provide a processing method for making firearm parts by powder injection molding.

The processing method of firearm parts is to mix graphite powder containing 0.05-1.0% iron and 2-8% nickel with a binder, process it into a blank by an injection molding machine, and then degrease and sinter.

The Present Invention Is Described In Detail In Conjunction With The Embodiments Below.

a. Preparation of binder: According to weight percentage, take 10-40% polyethylene glycol, 5-20% vegetable oil, 15-30% polyethylene, 1-10% plasticizer, and 15-54% paraffin, place it in a blade mixer, and mix it for 1 hour at a temperature of 140°-160°C.

b. Ingredients: The binder and graphite powder containing iron and nickel are mixed in a volume ratio of 56-40:54-62, and mixed in a mixer at 140°-160°C for 1.5 hours.

c. Injection molding: The above mixture is placed in an injection molding machine, and processed into blanks at 140°-150°C, injection pressure 40-65Mpa, and mold temperature 30°-60°C.

d. Degreasing: First, the blank is placed in water and heated to 40°-60°C, retained for 1-2 hours, and then the blank is placed in dichloromethane to dissolve paraffin and vegetable oil components; then the blank is placed in a degreasing furnace, and under hydrogen protection, heated to 300°C at a rate of 10°C/mmin, and then heated to 550°C at a rate of 15°C/min for pre-sintering.

e. Sintering: Sintering for 60-120 minutes in a bell furnace at a temperature of 1240°-1380°C under nitrogen protection.

Preparation Of The Binder Of The Present Invention.

Example 1: Take 30% polyethylene glycol, 10% vegetable oil, 25% polyethylene, 5% plasticizer, and the rest is paraffin, put it in a blade mixer, and mix it at a temperature of 140°-160°C for 1 hour.

Example 2: Take 10% polyethylene glycol, 20% vegetable oil, 15% polyethylene, 1% plasticizer, and the rest is paraffin, put it in a blade mixer, and mix it at a temperature of 140°-160°C for 1 hour.

Example 3: Take 40% polyethylene glycol, 5% vegetable oil, 30% polyethylene, 10% plasticizer, and the rest is paraffin, put it in a blade mixer, and mix it at a temperature of 140°-160°C for 1 hour.

The present invention can be used to process firearms parts, which can be formed in one time without post-processing, greatly reducing costs. The product density can reach 7.65-7.68g/cm3, and the dimensional accuracy can reach ±0.3% of the product size.

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. was founded in 1997 and is a manufacturer and technical solution provider focusing on metal powder injection molding (MIM) products, investment casting products, and precision forging products. With a strong R&D team and technical strength, we provide customers with fast and effective solutions and stable product supply.

Since its establishment, the company has always adhered to the principle of customer-oriented, quality-first, independent innovation and continuous improvement. Technology-first development policy.

The company's main business is the R&D, design, production and sales of metal product structural parts. The products can be widely used in key application fields such as consumer electronics, medical devices, and automobiles. It has advantages and rich experience in product R&D, mold development, process design, product manufacturing, quality control, etc.

The company has a stable core team, a strong technical team, and has introduced advanced equipment to form the core competitiveness of MIM products in the industry and become a strategic partner of MIM products for international customers.