Industrial

Weld mark formation mechanism Weld marks (also called water lines) are intersection marks formed when molten plastic flowing out of gates at different locations in the mold converges. The reason for the formation of weld marks is that the temperature, pressure, and speed of the molten material flowing out of each gate are not completely […]

Injection molding principle Taking the plunger injection machine as an example, the granular or powdery plastic is first fed from the hopper of the injection machine into the barrel equipped with a heating device for heating, melting and plasticization to turn it into a viscous flow melt, and then in the column of the injection

When the injection molding factory tested the mold before production, all the mechanisms were running basically normally, but the product had serious appearance quality problems, with radial white marks on the surface. And these white marks became more serious as the glass fiber content increased, This phenomenon is commonly known as “floating fiber”, which is

Single parting surface injection mold When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic parts. This is called a single parting surface mould, also called a double-plate mold. It is the simplest and most basic form of injection mould. It can be designed as a

When starting the design of each injection molded product, the mold opening direction and parting line must first be determined to ensure that the core-pulling slider mechanism is minimized and the impact of the parting line on the appearance is eliminated. Office chair injection mold golden rules for mold design

Prior confirmation and preliminary settings in mold Manual operating parameter correction Correction of semi-automatic operating parameters a. The molded products will not be whitened, cracked or deformed when they are ejected, clamped, trimmed and packaged. b. The mold temperature can be balanced and stable. Simple algorithm for cooling time of products with meat thickness of

Silver Streaks Definition When plastics are disturbed by gas during the mold filling process, silver streaks or tiny bubbles often appear on the surface of the product or bubbles are formed in the thick wall of the product. The main source of these gases is that the raw materials contain moisture or volatile substances or

Flash Definition Flash, also known as overflow, etc, mostly occurs at the opening and closing positions of the mold, such as: the parting surface of the mold, the sliding fitting part of the slider, the gap of the insert, the pore of the ejector rod, etc. If the flash is not resolved in time, it

In the process of studying the injection molding of plastic products, injection molding is often divided into two stages: in the first stage, most of the plastic is filled into the mold, generally 90% to 99.9% of the entire product volume; in the second stage, the pressure The actual product is obtained with the same

What type of oil cylinder do we use in injection molding? Standard Cylinder In the past, most of the oil cylinders I saw were standard oil cylinders. The first thing that comes to mind is that oil leaks from both ends every three days. They are very heavy and require a large area to store