行业组件数据 · 2026

下模座板

Lower mold plate is the stationary base component in injection molding and die casting machines that supports the mold cavity and provides structural stability.

技术定义与适配语境
典型 下模座板 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

The lower mold plate, also known as the stationary platen or bottom plate, is a critical structural component in mold assemblies for plastic injection molding, die casting, and compression molding processes. It serves as the foundation that securely holds the stationary half of the mold (typically the cavity side), provides mounting points for the entire mold assembly to the machine bed, and ensures precise alignment with the moving platen during operation. This component must withstand significant clamping forces, thermal expansion stresses, and repeated cycling while maintaining dimensional stability and alignment accuracy.

组件规格

定义
The lower mold plate, also known as the stationary platen or bottom plate, is a critical structural component in mold assemblies for plastic injection molding, die casting, and compression molding processes. It serves as the foundation that securely holds the stationary half of the mold (typically the cavity side), provides mounting points for the entire mold assembly to the machine bed, and ensures precise alignment with the moving platen during operation. This component must withstand significant clamping forces, thermal expansion stresses, and repeated cycling while maintaining dimensional stability and alignment accuracy.
工作原理
The lower mold plate operates as the fixed reference point in the mold assembly system. During machine operation, it remains stationary while the upper mold plate moves to close the mold. It provides: 1) Structural support for the mold cavity and core components, 2) Precise alignment through guide pins and bushings, 3) Thermal management through integrated cooling channels, 4) Force distribution to handle clamping pressures up to thousands of tons, and 5) Mounting interface for ejection systems and auxiliary equipment.
材料
Typically manufactured from high-strengthpre-hardened steel alloys such as P20 (1.2311)H13 (1.2344)or 4140 steel. Common specifications include: hardness 28-32 HRC (P20) or 48-52 HRC (H13)tensile strength 900-1200 MPayield strength 700-1000 MPawith excellent machinability and thermal stability. Premium applications may use stainless steels (420440C) or beryllium copper for specific thermal/conductivity requirements.
Hardness
28-52 HRC (material dependent)
Parallelism
0.03 mm maximum deviation
Surface Finish
Ra 0.8-1.6 μm
Weight Capacity
2-20 tons
Flatness Tolerance
±0.02 mm/m
Standard Thickness
50-300 mm
Maximum Load Capacity
500-5000 tons (machine dependent)
Thermal Expansion Coefficient
11.5-13.0 × 10⁻⁶/°C
标准
ISO 12165DIN 16760ISO 8015DIN 7167

行业分类与别名

下模座板 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Inadequate cooling channel design causing thermal stress concentration->Thermal fatigue cracks propagating from cooling channels->Implement optimized cooling channel layout with smooth transitions, use finite element analysis for thermal stress simulation, apply surface treatments to improve fatigue resistance
Improper clamping force distribution->Plate warping or permanent deformation->Design with sufficient thickness and ribbing, use multiple clamping points with even force distribution, implement strain gauges for force monitoring during setup
Corrosive coolant or processing materials->Pitting and erosion in cooling channels and mounting surfaces->Use corrosion-resistant materials or coatings, implement proper coolant filtration and treatment, establish regular cleaning and inspection protocols

工业生态与工程逻辑

0
Thermal fatigue cracking
1
Warping from uneven heating
2
Guide pin/bushing wear leading to misalignment
3
Stress corrosion in cooling channels
4
Fatigue failure from cyclic loading
5
Surface pitting from chemical exposure

合规与检测

tolerance
Geometric tolerances per ISO 2768-mK, flatness ≤ 0.05 mm/m, parallelism ≤ 0.03 mm, positional tolerance ±0.02 mm for mounting holes
test method
Coordinate measuring machine (CMM) verification, surface plate inspection with dial indicators, ultrasonic testing for internal defects, hardness testing with Rockwell scale, dye penetrant testing for surface cracks

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采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the difference between lower mold plate and moving platen?

The lower mold plate remains stationary during operation and supports the cavity side of the mold, while the moving platen travels to open and close the mold, typically carrying the core side. The lower plate provides the fixed reference point for alignment and mounting.

How often should lower mold plates be inspected for wear?

Regular visual inspections should occur every 500-1000 cycles, with comprehensive dimensional checks every 10,000-50,000 cycles depending on operating conditions. Critical wear points include guide pin holes, mounting surfaces, and cooling channel connections.

Can lower mold plates be repaired if damaged?

Minor surface damage can often be repaired through machining and resurfacing, but structural cracks or significant warping typically require replacement. Repair feasibility depends on material type, extent of damage, and original heat treatment.

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URN:CNFX:ME:UNIT:LOWER_MOLD_PLATE