Plastic Injection Molding Manufacturer

July 13, 2009

Increase the Life of Your Rubber and Plastic Parts

Filed under: Plastic Injection Molding,plastics manufacturing — Tags: , , — Rolf @ 4:06 am

plastic and rubber

When rubber and plastic parts are coated in the thin dense chromium and XADC coatings it will reduce maintenance requirements and downtime in the molding industry, including injection, extrusion, blow, pultrusion, RIM and SMC applications. The life of the molding components gets extended, particularly when ‘glass filled’ and ‘mineral filled’ resins are being formed. ‘Mineral filled’ resins are typically used for roofing panels.

The coatings also increase material flow due to the smooth, micro-nodular surface produced by the coating, leading to more shots and shorter cycle times. Molding areas stay cleaner longer and require less maintenance when they are used, and most burned-on plastic/rubber compounds can be quickly removed. They maintain required gloss levels and enhance textured surfaces. Post-polishing can improve reflectivity to a SPE #2 level. They can be applied to all ferrous and non-ferrous materials including beryllium copper and ampcoloy bronze. Surface hardness will be increased to 78 Rc* with this coating and, in comparison, will be increased to 98 Rc* with the XADC.

When coating rubber and plastic parts, utilizing thin dense chromium coatings is optimal. The reason for that is that the thin dense chromium coating is a low-temperature, multistate surface finishing process. It utilizes proprietary chemical solutions and application processes that are carefully monitored to produce its thin dense chromium, a silver satin matte chromium coating. Precise deposits insure fidelity to part contours and details, without the edge build or “dog-boning” associated with conventional ‘chrome plating’ processes.

The benefits of using the thin dense chromium coating are:

- 78 Rc* Surface Hardness.
- Reduced wear and corrosion resistance
- Absolute adhesion to basis metal- no chipping, cracking, flaking or peeling
- Improved release characteristics in plastics forming tools-cores, cavities, lifters, pins, screws, plates
- Reduced maintenance and part replacement costs

The thin dense chromium is unlike all other conventional hard chrome plating operations. The proprietary TDC coating conforms precisely to details in metal tools, resulting in a hard (78 Rc*) slippery, and corrosion-resistant tool surface.
RMS finishes will improve slightly to (Below the process may deter slightly.) Surfaces greater than will reflect greatly improved finishes.

Source: EzineArticles.com

Know The Processes, Applications and Other Facts Of Injection Mold

Filed under: Plastic Injection Molding,plastics manufacturing — Tags: , , , , — Rolf @ 3:44 am

Plastic Injection Molding

An injection mold is used in manufacturing processes in order to produce parts that come from plastic materials. The process is better known as injection molding. It starts when the thermoplastic or thermosetting plastic materials are fed into a barrel – usually heated – and mixed then forced into a cavity where it is left to cool. Cooling the materials will lead to hardening in order to follow the shape of the mold cavity.

Industrial engineers or designers are primary users of an injection mold. Molds are later enhanced by mold makers once the design have been produced by the engineer. The mold may be created out of several materials like steel or aluminum metals. Basic applications of the industrial product include the production of vehicle panels of cars or other smaller components in the automotive industry.

Characteristics of the injection molding process

In order to understand the process better, it is deemed fit to characterize the steps involved. It makes use of a ram or other screw-type plungers in order to make sure that the molten plastic is placed properly inside the mold cavity. Once it follows the shape of the mold, it may result to either of two forms – open or solid ended shapes. From the production, it will often be noticed that a parting line or gate mark may be seen. Furthermore, pin marks after ejecting the output may be visible.

Applications for an injection mold

When the injection molding process was introduced in the market, it catered to the production of simple products like buttons and combs. With the progression of manufacturing industries, other products have been created out of the mold. The common applications go to medical, aerospace and consumer industries as well as packaging, plumbing and construction.

Specific applications of the process extend to the production of bottle caps, containers, milk cartons, automotive dashboards and other products that may be created out of plastic. The process is considered very crucial in the world of part manufacturing. While injection molding may require high costs of investment, it is favored because of the lower labor costs and minimal losses on scrap.

Most common materials used in the process

Aside from thermoplastic and thermosetting plastic materials, elastomers are recommended in producing an injection mold. As years pass, more materials have been adapted in the process. Alloys and polymers like epoxy, phenolic, polyethylene, nylon and polystyrene are commonly used nowadays.

Source: EzineArticles.com

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