Thin-walled components Thin-walled components those with main walls that are less than 1.5 mm thick may require special high-performance molding equipment to achieve the required filling rates and injection pressures. This could possibly drive up the molding costs and offset…
Here’s a practical DFM (Design for Manufacturability) check list for injection mold design you can run before quoting / steel cutting. I’m writing it like a shop-floor checklist (pass/fail + numbers). 1) Part basics (must lock first) 2) Wall thickness…
This really is 1 from the current innovations to mould making techniques and, in fact, it should come below the machine injection mould area. Nevertheless, as the rule relating to operating is various through that relating to most different basic…
The process of injection moulding has today evolved to a high technical level. Major technical advances arc not to be expected. Areas of interest to moulding machine designers and engineers include process control and quality assurance where inroads are…
All materials shrink on cooling due to thermal contraction. The shrinkage of the plastic on cooling from the melt temperature to the mould temperature is known, somewhat perversely, as the mould shrinkage. The principal reason for mould shrinkage is thermal…
Stack molds are a few of the the majority of amazing manufacture mould available anywhere. The design and skillfullness that goes directly into a stack custom mold is actually a marvel. To the layman, who may never have constructed a…
Hot runner design keeps plastic melt hot from the machine nozzle to the cavity gate. Heated manifolds and drops replace cold runners, so the mold produces parts without runner scrap. A well-designed system balances fill across cavities, holds melt temperature…
Melt does not fill a cavity at random. Polymer chains stretch along the flow direction as melt squeezes through the gate. The cold mold wall freezes them in that stretched state within milliseconds. This frozen orientation is why a part…
A Sink Mark can be defined as a depression, resembling a dimple or groove, caused by excessive localized shrinking of the material after the part has cooled. MACHINE BARREL TEMPERATURE TOO HIGH Explanation: If the barrel temperature is too high,…
Knit Lines (Weld Lines) A knit line forms wherever two melt fronts meet and fail to fully merge. The line is always weaker than the surrounding plastic. In the worst case it holds about 20% of the base strength. In…
