Direct molding

Mosbach K (2001) Toward the next generation of molecular imprinting with emphasis on the formation, by direct molding, of compounds with biological activity (biomimetics). Anal Chim Act 435(l) 3-8... 

Other developments of one-shot flexible foam systems include direct molding, where the mixture is fed into a mold cavity (with or without inserts such as springs, frames, etc.) and cured by heat. In a typical application, molds would be filled and closed, then heated rapidly to 300°F-400°F (149°C-204°C) to develop maximum properties. 

MD machine direction, mold direction OTC over-the-counter... 

VIII. ANTI-IDIOTYPIC IMPRINTING AND DIRECT MOLDING ... 

Figure 14 Schematic representation of the anti-idiotypic and direct molding methodologies. (a) The anti-idiotypic imprinting can lead to new compounds mimicking the original template [45], (b) Direct molding assembles ligands by polymerization/condensation within or between sites of a biological target [47].

A soft template route involves an organic compound, such as polymers or surfactants, which is used as a direct mold in order to obtain a structured carbon precursor. Then, the soft template is eliminated during the carbonization stage. Nowadays, there are a large number of preparation methods reporting materials with a wide variety of structures and pore size distributions. In general, these methods are more versatile and cheaper than nanocasting ones. Moreover, the... 

Harris and Lee (2008) studied the increase of crystallinity of injection molded poly(lactic acid) (PLA). The PLA was first dried and dry mixed with fillers. It was then melt extruded with a twin screw extruder in a temperature range of 160-190 °C with a screw speed of 230 rpm. Extruded pellets were dried and injection molded at various mold temperatures. They found that material crystallinity was enhanced by addition of nucleating agents (about 2%), by annealing injection molded samples or by directly molding the material in a preheated mold. 

Direct molding begins with the preheating of the PP-textiles in an infrared station, a convection oven or directly in the shaping tool. As previously discussed, suitable measures must be taken (utilization of a tenter or blank holder) to prevent the thermally activated, orientation-induced shrinking stresses [57,68]. Nevertheless, a good thermal contact should be ensured, so that an even temperature distribution is possible between the single layers. 

The electrical resistivity of the graphite crystal was reviewed in Ch. 3, Sec. 5. The crystal has a high degree of electrical anisotropy with resistivity that is low in the ab directions and high in the c direction. Molded graphites (even the isostatically molded material where the crystallites are essentially random) have higher resistivity than the singie-crystal in the ab directions, but can stiii be considered electrical conductors. 

D.C.T. Tan, et al.. Effect of binders on the release rates of direct molded verapamil tablets using twin-screw extruder in melt granulation. Int. J. Pharm., 463 (1), 89-97,2014. 

Under normal conditions, some resins such as PE, PS, and PA can be directly molded however, to meet the requirements of a particular application performance, treatments such as... 

Single- Screw Extruder Continuous Mixer Direct Molding Twin-Screw Comppunder 1 Twin-Screw Compounder 2 Twin-Screw Compounder 3... 

Direct molding, the introduction of a dry blend of chopped strands and powdered polymer, is practiced by some molders. In this type molding a device for producing, conveying, and metering the dry blend is necessary. 

Blending powder and glass in a mixer and direct molding the blend. 

Other things being equal, normally, at the same glass concentration the direct molding of powder blended with glass is less expensive than molding glass-reinforced pellet concentrate with unreinforced pellets. This is because the pellet concen-... 

Minimization of thermal degradation by direct molding/shaping. 

Figure 7.31 Improvement in product properties by a direct molding system. Impact kgfcm/cm Flex. Modulus kgf/cm2 DI Direct feeding in injection molding machine Comp. Conventional compounding system D.M. Direct compounding and molding system...

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