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 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 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…
Routine washing and appropriate preservation are critical for retaining the life span of a custom mold. In case preventative preservation procedures are persistently and correctly carried out, they reduce the expense of ownership and raise manufacture good quality: a win-win…
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.…
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.…
Standard mold parts are used extensively in almost all modern injection mold tools. Only a few special-purpose tools are constructed from Scratch, without taking advantage of the standard components available. Even these tools would have a small number of standard…
The gate land should be as short as possible to achieve lower pressure for filling and to improve de-gating by minimising the height of gate vestige. The only reason for not using very short lands is the loss of strength…
The gate design should deliver a rapid, uniform and preferably Linidircctional mold-filling pattern,the gate location should allow the air present in the cavity to escape during the injection phase. Failure to vent the air will result in short shots or…
A gate is a small opening (or orifice) through which the poly melt enters the cavity. Gate design for a particular application includes selection of the gate type, dimensions and location. The gate design is largely determined by: The part…