Address
304 North Cardinal St.
Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Analytical relationships for flow rates versus pressure, which apply to the flow of plastics materials, are shown in Table 10.1. However, this table is a strict application to Newtonian fluids, where the resistance to flow is independent of the shear…
GENERAL CONCEPTS OF DIE DESIGN An extrusion die is a shaped orifice made in a block of steel or other suitable structural material that is wear- and corrosion-resistant. The function of the die is to receive the melt stream emerging…
Statistics for the plastics industry show that the major portion of plastics materials passes through an extruder at some stage in processing enroute to the final product. The extruded material may be only the raw material for another molding…
Tools for Plastics The entire processing industry is dependent on give continuous production, excellent finish, and easy ejection of molded part without distortion, close dimensions, flawless pieces, and low cost cleaning of parts after molding. A good mold will give many…
Compression Molding The molds used for compression molding consist of a cavity and a force or plunger. Guide pins maintain the proper relation between these members. The mold cavity forms one surface of the molded part and the molding compound…
Reinforced Plastics Only a few years ago，the term reinforced plastics was used to refer to a group of low-pressure molding materials fabricated by using a thermosetting resin to coat or impregnate a cloth, random fiber, or continuous filaments. Now, the term is used…
What information need for mold design It is frustrating and wastes valuable time to find during your work that information is missing, or when significant changes are made after starting that can affect the concept of the mold. Are the…
Vibratory Grinding Vibratory or slide grinding is an alternative to the conventional rotary barrel process. The workpieces are placed in a container which is subsequently filled with a mixture of granulated zinc, water, alumina as polishing medium, and a welling…
In many cases, and by no means exclusively for the production of optical articles, the condition of the cavity surface (porosity, ripples, roughness) is crucial to the quality of the final product. This has a decisive effect on the time…
Machining Production Methods Machining production methods may be divided into processes with geometrically defined cutter (turning, milling, drilling，sawing) and geometrically undefined cutler (grinding, honing，lapping). The machinery, frequently special equipment has to finish the object to the extent that only little…
