What is drooling in injection molding?

When nozzles are moved away from the mold after injection molding has been carried out, trickles of plastic from the sprue gate occur. This trickle of plastic is generally called the drooling (trickling), which is said to be caused by residual pressure stored in the sprue and runner.

What are the different types of moulding machines?

3 Main Types of Moulding Machines | Metallurgy

• Type # 1. Squeezers:
• Type # 2. Jolt Machines:
• Type # 3. Sand Slingers:

Which machine is not used in machine Moulding?

The sand inertia is used for molding and is not a medium of machine whereas, the use of compressed air, hydraulic power or high impellor is used to obtain performance from power operated machines.

What are the different types of nylon?

Nylons are typically described according to numbers (6, 66, 11, 12, etc.) which relate to their molecular structures. Although there are many types of Nylon, the two most common available in sheet, rod, and tube are Nylon 6 and Nylon 6/6. Nylon 6 and Nylon 6/6 – have very similar mechanical, thermal, and electrical properties.

What is the wall thickness of in-injection molding?

Injection molding necessitates uniform wall thickness. If you were to cut a cross-section of the Panasonic mold above you would notice that the wall thickness is approximately 2-3mm thick throughout. Keeping walls from being too thick is important to prevent inconsistencies in the cooling process resulting in defects like sink marks.

What is the best way to make nylon 6?

Nylon 6 – is generally manufactured into sheet, rod, and tube via a liquid casting process. Casting is often the most cost effective method for producing large diameter rod, tube, and thick sheet. This process has the added advantage of allowing manufacturers to create custom near net (irregular) shapes.

What are the disadvantages of injection molding?

Two of the major disadvantages to injection molding are the high tooling costs and large required lead times. Tooling is almost a project in and of itself and only one phase of the entire injection molding process.