CN Mould & Plastic Limited

Waterproof Design Studies

17
07, 2026
How to Keep Water Out in Multi‑Shot Molding? Focus on TPE Wrapping and the Seal Line
In multi-color and multi-material injection molding, achieving reliable waterproofing depends on one key factor: whether the interface between the two materials forms a continuous, uninterrupted seali...
02
07, 2026
One Slider, Two Shapes: Smart Sequential Core-Out and Core-In Strategies for 2K Mold
Product DescriptionFigure 1-1 shows a two-shot product of an internal electronic component. It has an average wall thickness of 1.5 mm and overall dimensions of 31 mm × 42.7 mm × 131 mm. The green s...
03
06, 2026
Why Do Mold O‑Rings Leak? Causes and Groove Design Requirements
O-rings are the most commonly used sealing elements in mold cooling systems. When they fail, water leakage or seepage can occur, leading to mold damage and production downtime. This article explains w...
23
04, 2026
Silicone Keypad Waterproof Design for Electronics
Waterproofing is critical in electronic products to prevent moisture damage like short circuits and corrosion. As user expectations rise, waterproof design has become a standard part of product develo...
12
03, 2026
Mastering the Ejection Process in Two-Shot Molding: A Deep Dive into a Complex Ejection Mechanism
In the world of injection molding, two-shot (or multi-component) tooling represents the pinnacle of complexity and precision. While much of the focus often falls on the cavity design and the initial s...
03
03, 2026
Understanding the Slider Mechanism in Multi-Shot Injection Molds – A Case Study of the First-Color Top Cover
In the world of injection molding, complex part geometries often require equally complex mold designs. One such example is the first-color top cover shown in Figure 1-1, which features an innovative s...
10
02, 2026
Tackling Complex Overmolding: Parting Lines, Ejection Strategy & Gate Design
Designing a mold for a complex overmolded part is always a challenge, but some projects truly push the boundaries. This blog walks through the critical thinking and solutions for a particularly intric...
26
01, 2026
Product and Equipment Specification for Two-Color Mold
Figure 1-1 presents a two-color drawing of an automotive interior component, where the green section is the first-shot PP+30% GF material (hard plastic) and the orange section is the second-shot TPE m...
19
01, 2026
Analysis of the Seesaw Mechanism and Hamburger Structure in Two-Color Injection Molding
Product EjectionThe ejection of this two-color product is relatively straightforward. The ejector rod of the injection molding machine pushes the ejector plate and the ejector retainer plate, which in...
15
01, 2026
Combined Slider Structure with Sub-slider on Fixed Half for Two-color Mold
Product EjectionThis mold is a typical two-color mold with a rotating moving half. After the first color product is injection molded, the mold opens for the first time. The moving half then rotates 18...