This paper presents measurements of acoustic emission (AE) signals during the injection molding of polypropylene with new and damaged mold. The damaged injection mold has cracks induced by laser surface heat treatment. Standard test specimens were injection molded, commonly used for examining the shrinkage behavior of various thermoplastic materials. The measured AE burst signals during injecti...

Molding process in IC manufacturing secures chips against the harms done by hot, moisture or other external forces. While a chip was being molded, defects like cracks, dilapidation, or voids may be embedding on the molding surface. The molding surfaces the study poises to treat and the ones on the market, though, differ in the surface where texture similar to defects is everywhere. Manual inspe...

Dear Editor: We read with great interest the article by Namratha and Shetty entitled “A Technique to Evaluate Custom Tray Border Extensions Before Peripheral Molding.” Articles related to evaluation of denture border extensions are numerous, but there is marked paucity of literature regarding evaluation of border extensions of custom trays before border molding. The authors have introduced a co...

Introduction: Cleft lip and palate is a congenital anomaly occurring in 3 in 1000 live birth. One the major concern in this patient is about cleft gap and its surgical problems. Several surgical and non-surgical procedures have been done to decrease this gap. They aimed to achieve the more esthetic results as well as feeding success. Nasoalveolar Molding (NAM) is a new method for reshaping nasa...

Efficiency and effectiveness are indispensable things in the production process. Accurate use of existing resources shorter cycle time particular concern to optimize This research aims implement automation a conventional blow molding. An advanced attempt was carried out Internet Things (IoT) increase its efficiency while maintaining quality products. The nodeMCU microcontroller blynk applicatio...

The introduction of long-chain branched structures into biodegradable polyesters can effectively improve the melt strength and blow-molding properties polyesters. In this study, pentaerythritol (PER) was used as a branching agent to synthesize poly(butylene dodecanedioate) (PBD), resulting polymers were characterized by Nuclear Magnetic Resonance Proton Spectra (1H NMR) Fourier Transform Infrar...

Injection molding has been the most popular method for making plastic products due to high efficiency and manufacturability. The injection molding process includes three significant stages: filling and packing stage, cooling stage, and ejection stage. Among these stages, cooling stage is very important one because it mainly affects the productivity and molding quality. Normally, 70%~80% of the ...

background and aims. the aim of this study was to compare flexural strength of specimens processed by conventional and injection-molding techniques. materials and methods. conventional pressure-packed pmma was used for conventional pressure-packed and injection-molded pmma was used for injection-molding techniques. after processing, 15 specimens were stored in distilled water at room temperatur...

Gas-assisted injection molding process is much complicated,the process parameters have multiplied. In this paper, a product with typical character of gas-assisted injection molded part is employed as the object of study. With the mould of gas-assisted injection molding and MPI/3D GAS in Moldflow software,the influence rule of the 6 important process parameters on gas penetration length in gas-a...

background: the shielding methods in radiotherapy due to delivering an accurate radiation dose to cancer tissues and avoiding unnecessary dose to normal tissues are very important. these methods include lead standard blocks, individual molding and multi leaf collimator (mlc). the mlc method is not still common in iran radiotherapy centers. individual molding is better than the lead block shield...