What changes the engineering choice
Glass-fibre reinforcement can increase stiffness, but it also changes molding behavior and the way the part interacts with mating surfaces.
Fibre orientation, gate location and wall flow can create direction-dependent shrinkage. Reinforced materials may also be more abrasive to mating components.
Fibre orientation follows mold flow, so the same nominal resin can shrink differently along different directions in the part. A gate change can therefore change flatness or hole location without changing the CAD. Reinforcement can also make a housing stiffer while increasing wear on sliding metal or plastic counterparts. Review both structural benefit and interface abrasion before selecting the grade.
Drawing and application data
Specify the grade, stiffness requirement, heat exposure, inserts/fasteners, surface finish and any wear interfaces.
尽可能将这些信息添加到受控图纸、规格说明或询价附件中。避免在非正式的沟通渠道中发布这些信息，有助于供应商比较和后续修改的管理。
A common source of error
Treating reinforced resin as a drop-in replacement for unfilled plastic can change dimensions and tool wear requirements.
How to prove the design
Validate critical flatness, hole position and assembly loads in the molded orientation of the production part.
For Glass-Fibre-Reinforced Plastic Housing Design, close the DFM loop by updating the controlled CAD/drawing and sample plan. A recommendation that never reaches the released revision cannot be inspected consistently in production.
Supplier brief
Before requesting a price for glass-fibre-reinforced plastic housing design, identify the current drawing revision, production quantity, material constraint and the feature that most strongly affects function. Ask the supplier to flag any deviation from those inputs in the quotation so technical alternatives stay visible.
针对此决策的实用设计审查
Housing DFM starts with a functional wall map. Keep wall transitions deliberate, use ribs and bosses to carry defined loads, provide draft where the tool needs release, and consider how gate and ejection locations interact with cosmetic and dimensional surfaces. The supplier should review these decisions against the selected resin and tool layout.
将假设条件记录在图纸或询价单中，以便供应商在报价前进行确认。如果某个数值未知，应将其标识为待定工程项目，而不是直接复制可能与实际装配不符的通用产品目录编号。
验证工作表
- Nominal wall and transitions
- Rib/boss load path
- Draft and undercuts
- Insert / fastener loads
- Gate / parting / ejector restrictions
- Flatness and critical datums
使用第一个样品，通过尺寸验证和相关的功能检查来确认这些要点。任何可接受的偏差都应在重复生产前的受控修订中记录下来。
