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24212
YIXUN mold
8480419090
When it comes to cost-effective, high-efficiency custom injection molding for matched component sets, mold layout design and material selection decide the core competitiveness of your plastic parts. Today we are breaking down a mature molding project of three matched plastic housing pieces, covering material specs, mold cavity layout, gating solution, production advantages and applicable industry scenarios.
The entire part family adopts Polylac PA-757F ABS from Chi Mei, a classic food-contact safe ABS resin with full FDA certification, tinted solid black for the finished product.
Excellent melt fluidity enables smooth filling of thin-wall shell structures, minimizing weld lines and incomplete filling defects during injection.
Balanced rigidity and impact resistance: the finished housing resists bending deformation and minor dropping cracks, with a working temperature range of -20℃ to 80℃ to adapt to daily ambient temperature changes.
Stable molding shrinkage at 0.5%~0.7%, which guarantees outstanding dimensional consistency during mass production.
Great adaptability for post-processing including laser marking, UV coating, hot stamping and screen printing, supporting customized logo and surface decoration as per client demands.
Instead of manufacturing three individual molds for part codes 108075, 108076 and 108077 separately, we adopt a 2+1+1 multi-cavity shared mold structure:
2 cavities produce component 108075
1 cavity produces component 108076
1 cavity produces component 108077
In one single injection cycle, the mold outputs a complete matched set of accessories for assembly.
Slash upfront mold development cost drastically: one mold replaces three independent tooling sets.
Eliminate frequent mold switching on injection machines, cutting down setup downtime and labor waste for small-batch repeated orders.
Simplify warehouse and order management, as finished parts come out in matching proportions directly from production.
These three items are structural housings composed of flip brackets, top covers and bottom bases, equipped with built-in snap fits and screw bosses. No adhesive glue is needed during assembly; users can lock the whole set together with clips and screws for easy disassembly and maintenance, with stop ribs reserved for tight assembly gaps and basic dustproof performance.
We apply the large sprue submerged gate (submarine gate) as the feeding method for this two-plate mold, which is a highly practical solution for cosmetic exterior plastic casings.
✅ Hidden gate position on the inner edge of parts, with zero obvious gate residue on the visible outer surface, no extra polishing or trimming required for appearance requirements. ✅ Automatic gate breakage during mold ejection. It can connect with automatic runner cutting equipment on production lines to reduce manual finishing procedures and shorten the overall production cycle. ✅ Two-plate large sprue mold has simpler structure, lower machining difficulty and more convenient later maintenance compared with three-plate pinpoint gate molds, greatly lowering long-term mold repair costs.
The standard submerged gate diameter is controlled at 0.8~1.2mm. Strict raw material drying is required before molding to avoid cold material blockage inside the narrow gate channel. For ultra-thin wall areas near the gate, parameter optimization is necessary to prevent product whitening or cracking caused by ejection pulling force.
This series of FDA ABS co-molded housings is widely applied in multiple fields:
Food-contact equipment enclosures and portable tableware storage containers
Small precision instrument and meter outer casings
Maternal & infant daily product structural parts
Mini smart electronic device and kitchen small appliance protective shells
For cross-border e-commerce sellers, brand OEM buyers and equipment manufacturers, this co-mold injection molding mode perfectly fits small-to-medium batch customized orders. It balances tooling investment, production efficiency and finished part quality, and the food-safe material expands product application boundaries to consumer goods that require direct food contact.
Custom injection molding is never a one-size-fits-all service. By tailoring cavity layout, gating system and resin grade according to assembly logic and usage environment of target products, we can create a molding plan that maximizes economic benefits while locking in stable product quality. If you have a set of matched plastic components needing mold development, the 2+1+1 multi-cavity co-mold solution is definitely a worthy option to evaluate.
