AbrahamMac
Industry info Wiki Q&A
Q varieties of polyester
BarryLily
AbrahamMac Release Time: June 22, 2024, 3:09 PM
Blow molding is a manufacturing process used to create hollow plastic parts, such as bottles, containers, and other similar items. It begins with melting plastic and forming it into a parison or preform, which is a tube-like piece of plastic with a hole in one end through which air can be blown. This parison is then clamped into a mold, and air is blown into it, forcing the plastic to expand and take the shape of the mold. After the plastic cools and solidifies, the mold opens to release the finished product. There are three main types of blow molding: extrusion blow molding, injection blow molding, and stretch blow molding, each suitable for different applications and products. This process is favored for its ability to produce lightweight, durable products efficiently and with relatively low material costs.
0
Q what is shrinkage in injection molding
SabrinaBach
AbrahamMac Release Time: May 30, 2024, 10:20 AM
Sink marks in injection molding are small craters or depressions that can occur on the surface of molded parts. They typically result from uneven cooling and solidification, leading to volume shrinkage in thicker areas of the part. When material inside the mold cools and solidifies, the outer surface solidifies first, while the material in the interior remains soft. As the interior cools, it shrinks, pulling the surface inward and creating a sink mark. Factors contributing to sink marks include the material’s properties, wall thickness, mold temperature, and injection speed. To minimize sink marks, manufacturers may adjust process parameters, optimize part and mold design to ensure uniform wall thickness, and choose materials less prone to shrinkage. Properly addressing these factors can significantly reduce the occurrence of sink marks, improving the aesthetic and structural integrity of the finished product.
0
Q hdpe pipe manufacturers usa
QuintinaTours
AbrahamMac Release Time: May 29, 2024, 9:56 AM
In the USA, HDPE (High-Density Polyethylene) pipe manufacturers are key players in the construction and utility industries, supplying products essential for water, gas distribution, and sewage systems. Notable companies include JM Eagle, one of the largest manufacturers globally, offering a wide range of HDPE pipes suitable for various applications. Performance Pipe, a division of Chevron Phillips Chemical Company LP, brings high-quality polyethylene pipes with a focus on the oil, gas, and industrial sectors. ISCO Industries is another significant provider, specializing in custom HDPE fabrication and providing comprehensive solutions for multiple market sectors. These manufacturers are known for their innovation, sustainability efforts, and commitment to quality, ensuring reliable and durable infrastructure.
0
Q what dissolves polypropylene
TracyChaucer
AbrahamMac Release Time: May 26, 2024, 9:52 PM
Polypropylene, a thermoplastic polymer widely used for packaging, textiles, and various types of containers, has a high resistance to solvents, acids, and bases, making it difficult to dissolve. However, it can be dissolved by highly aggressive solvents under specific conditions. The most effective solvents for dissolving polypropylene are concentrated sulfuric acid and a mixture of para-xylene and an aliphatic solvent at high temperatures. Other strong solvents like chlorinated hydrocarbons (e.g., dichlorobenzene) may also work but with less efficiency and require elevated temperatures and extended exposure times. While these methods can dissolve polypropylene, they are hazardous and require careful handling and appropriate safety measures. For practical or industrial purposes, mechanical recycling or thermal degradation is often preferred due to the challenges and risks associated with chemical dissolution.
0
Q how to avoid jetting in injection molding
BobYoung
AbrahamMac Release Time: May 24, 2024, 9:00 PM
Sink marks in injection molding are depressions or indentations that occur when the outer shell of the molded part hardens before the inner material does, leading to a volume shrinkage on the surface. To avoid them, consider the following strategies: 1) Optimize wall thickness, ensuring it is uniform because thicker areas cool slower, causing sink marks. 2) Increase the holding pressure and time, allowing additional material to flow into the mold, compensating for shrinkage. 3) Adjust material temperature and mold temperature; higher temperatures can improve flow and reduce premature cooling. 4) Modify the gate location to ensure even filling and proper packing of the mold. 5) Choose materials with low shrinkage rates. 6) Use core and cavity designs that help in even cooling. Precise control over the injection molding process parameters and thoughtful design modifications can significantly mitigate the risk of sink marks.
0
Q can i use plumbers putty on pvc
CelesteMarjory
AbrahamMac Release Time: April 27, 2024, 11:17 AM
Using primer before applying PVC cement is highly recommended, especially for water-carrying pipes or under high pressure. Primer cleans and softens the PVC surface, ensuring a stronger bond when cement is applied. For non-pressure applications, such as drainage pipes, some might skip primer, but it’s a step that improves joint integrity and longevity across all uses. Skipping primer might save time initially, but could lead to joint failures in the future. Always follow local plumbing codes which often require primer.
0
You May Like
Q&A
Popular Information
Contacts Us:
Tel：WhatsApp +1 (443) 226-3000
email：service@tdd-global.com
User Agreement Privacy Policy Cookie Policy Intellectual Property Protection Policy About us
Copyright © 2021-2025北京涂多多电子商务股份有限公司All Rights Reserved