Category plastic mold

hot runner injection mold

A hot runner injection mold is a type of injection molding system in which the plastic melt is heated and delivered to the mold via a heated nozzle. The main advantage of using a hot runner system is that it…

Plastic Mold Maintenance tips and know-how

plastic mold maintenance         一.准備清模工具:噴槍,氣槍,手電鉆,去漬油,砂紙,碎布,油石,煤油,圓銅刷,棉花. Prepare mold cleaning tools:spray gun,Air gun,electric hand drill,Cleaning fluid , clean Cloth ,Oil stone,Kerosene,Round copper brush,Cotton. 二.用油石將公母模入子的油污清除.(400#油石) Use oil-stone to polish dirt on the inserts, which is fixed in mold cavity or core.…

Injection Molding Touble Shooting

Injection Molding Touble Shooting Problems Water Mark Streak Flash Weld Line Poor Surface Unfilled Burn Color Problem Deform Thick Crack Possible Reason Low Barrel Temp ● ● ● ● ● ● High Barrel Temp ● ● ● ● ● High Injection Pressure ● ● ● Low Injection Pressure ● ● ● ● Short Packing Time ● Long Packing Time ●…

surface roughness

Surface Ra of different plastic molding material Ra   index arrange μm 0.012 0.025 0.05 0.1 0.2 0.4 0.8 1.6 3.2 6.3 12.5 25 inject Thermoplastics PMMA 0.025 0.05 0.1 0.2 0.4 0.8 1.6 ABS 0.025 0.05 0.1 0.2 0.4 0.8 1.6 AS 0.025…

slider and cam

Sliders :after plasticmold open,the cam and sliders have the relative movement trend, which trend makes the slider has 2 movement directions , opening direction and the horizontal direction .then the undercut could be released from the mold. figure     Suitable for thin mold plate and upper fixed plate screwed with the A plate with longer march surface , better stability         Suitable for thick mold plate , the big mold space,two-plate mold and three plate mold Matching surface L≧1.5D(D cam  diameter ) better stability         Suitable for thick mold plate , two-plate mold and three plate mold， mating surfaces L≧1.5D(D cam diameter ) Poor stability,hard machining.…

standard parts in mold tools

While the use of standard parts in mold tools has many advantages, it can take a long time to incorporate them in to mold tool designs as a. great deal of information has to be looked up in the catalogues.…

Runner System Design Rules

Runners must be designed to fill the cavity rapidly, routine design must provide for easily ejection and easy removal (de-gating) from the molded part. For multi cavity system, balanced runner layout is practical for the best uniformity and part quality.…

Runner Cross-Section and Layout

The purpose of the runner is to transport the melt from the sprue to the gates. There are three basic parameters for runner geometry: The cross-sectional shape The diameter The cavity layout The most efficient runner section is the full…

Cold Slug Well

Cold Slug Well-This is designed to trap the cooler advancing front of the melt、thus permitting hotter melt to reach the cavities and gates. It usually has a snatch or pull pin or sucker pin underneath it to positively pull the…