sewing machine spare parts spare parts for textile machine by metal injection molding

Spares for Dobby Machines, sewing machine spare parts, spare parts for textile machine by metal injection molding
Product Description
Processmetal injection molding ProductsSpares for Dobby Machines, sewing machine spare parts, spare parts for textile machine by metal injection molding Materialsstainless steelDimensionsAccording to customer’s drawingSurface treatmentHeat treatment, polishing, powder coating, galvanized, electroplating, spraying, and plating and so on.Precision/Tolerance+/-0.01mmServiceOEM & ODMPackingWooden box, or as per the customer’s requirementsApplicationDobby machines, sewing machine and textile machine.
We are specilized in MIM for more than 10 years, and have our own factory and machining workshop, it make our factory price more competitve.
And we also provide OEM and ODM, should you need any help, please do not hesitate to conatc us.
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MIM material
MIM materials have had their chemistries modified in order to withstand the complex metal injection molding process.
There are a wide variety of materials available for metal injection molding, and they generally fall into four categories:
Ferrous alloys, Tungsten alloys, Hard materials, Special materials. Ferrous alloys:steelsstainless steelstool steelsiron-nickel magnetic alloysspecialty ferrous alloys (Invar and Kovar)Tungsten alloys:tungsten heavy alloys tungsten-copperHard materials:cobalt-chromium cemented carbides (WC-Co)cermets (Fe-TiC) Special materials:aluminumprecious metals titanium alloysnickel nickel-base super alloys molybdenummolybdenum-copperparticulate composites Other specific materials: Brass stainless steel:316L Stainless steel17-4PH stainless steel420 stainless steel440C stainless steel 430/303/304Low alloy steel:Fe-2Ni low alloy steelFe-8Ni
At HZMIM, we specialize in stainless steel, and low alloy steel materials for MIM. We can also process Cobalt Chrome (F-75) and other specialty or custom materials.
Don’t worry if you don’t see your material of choice, we can manufacture your precision component using many other materials.
MIM Process
once the proper material is selected, the key steps for the MIM process are as follows:
Step 1: Feedstock – very fine metal powders—usually <15 microns—are mixed with a primary paraffin material and a secondary thermoplastic polymer resulting in a 95-100 percent theoretical density and much closer tolerances.
Step 2: Molding – the feedstock is fed into our multi-slide MIM machinery or our conventional molding equipment, then heated and injected into a cold cavity under high pressure. once it is removed, the component is referred to as a “green part.”
Step 3: Debinding – the “green part” is then put through a controlled process called debinding that removes the binder and prepares the part for the final step. once the debinding is complete, the component is referred to as “brown.”
Step 4: Sintering – the “brown” part is held together by a small amount of binder and is still fragile. During sintering temperatures reach near the melting point of the material. Sintering eliminates the remaining binder and gives the part its final geometry and strength. The entire sintering process takes 15 to 20 hours.
MIM Tooling
When choosing a MIM manufacturer you want to make sure that whatever tooling process you choose delivers consistent parts efficiently and repeatedly. At HZMIM we offer:
Conventional tooling – comes in single cavities, meaning only one part is created per cycle. Our conventional tooling process is suited to larger parts and is designed to offer you efficiency in production and lower costs.
Multi-slide tooling – uses four or more perpendicular slides enabling very complex and accurate casting. In some cases, we use up to six slides, with angles other than 90 degrees. This new process helps meet tighter tolerances and offers better part-to-part consistency.
Heat Treating for MIM Components
MIM materials may be heat treated to increase strength, hardness, and wear resistance. The degree of hardening is determined by the percentage of carbon, alloying elements, and residual porosity of the component. Heat treated parts are given the ultimate tensile strength. To ensure optimum strength and durability, tempering or stress relief is required after quenching.
Calibration after Sintering
After your components are completely rid of all binding material, it may need to be calibrated. Calibration can include these three processes:
Coining
Sizing
Straightening
During the sintering process, parts can be distorted, and start to sag or drag. The three processes above correct these issues and return the part to its original design. Some manufacturers will ship your components elsewhere for calibration, however HZMIM does this process in-house.
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