Corrosion-Resistant Core Inserts | Precision ID Ground Hot Runner Parts

Product Overview

Senlan Precision manufactures corrosion-resistant rounding core inserts with inner grinding for hot runner injection molding systems. These inserts are produced strictly to customer drawings (Built-to-Print) and are designed to ensure smooth melt flow, stable dimensional control, and long service life in high-temperature, high-cycle molding environments.

Key Features & Advantages

• Corrosion-resistant materials (per drawing specification) suitable for hot runner operation

• Inner grinding process for high concentricity, roundness, and surface consistency

• Stable thermal performance under continuous hot runner temperatures

• Precision rounding geometry to optimize melt flow and reduce material degradation

• OEM / non-standard manufacturing fully based on customer drawings

• Consistent quality for multi-cavity and high-output molds

Applications / Industry Use

• Hot runner injection molding systems

• Plastic bottle and bottle cap molds

• Packaging molds requiring corrosion resistance

• Medical and hygiene-related plastic molding components

• Multi-cavity injection molds with high temperature stability requirements

Mold Structure & Design Description

Rounding core inserts in hot runner systems directly influence melt distribution, flow stability, and part quality. The inner grinding process ensures precise internal geometry, controlled roundness, and uniform wall thickness. Proper fit with hot runner manifolds and surrounding mold components is maintained according to drawing-defined tolerances, supporting reliable assembly and long-term operation.

Manufacturing Capability & CNC Machining

• Machining equipment: High-precision CNC machines from MAKINO (Japan) and HARDINGE (USA)

• Core processes: CNC turning, CNC milling, inner grinding, precision finishing

• Dimensional control: Tight tolerance management for internal diameters and concentricity

• Surface condition: Ground internal surfaces as specified for hot runner performance

• Production stability: Suitable for batch and repeat orders

Custom Development / OEM Workflow

1. Technical review – Drawings, material, tolerance, and hot runner interface requirements

2. Process planning – Machining and inner grinding strategy definition

3. Precision manufacturing – CNC machining and grinding execution

4. Inspection – Dimensional, concentricity, and surface verification

5. Delivery – Export-standard packaging and documentation

Quality Control & Export Experience

• Material traceability and incoming inspection

• In-process dimensional and grinding checks

• Final inspection for fit, geometry, and surface condition

• Stable export experience supporting international mold manufacturers

• Consistent quality for long-term supply programs

Related Products

• Hot runner core inserts and wear parts

• Mold cavity and core inserts

• Threaded core inserts for packaging molds

• Built-to-print injection mold spare components

FAQ (Technical & Purchasing)

Q1: Why is inner grinding important for hot runner core inserts?
Inner grinding ensures accurate roundness, concentricity, and smooth internal surfaces, which are critical for stable melt flow and thermal performance.

Q2: Are these inserts standard parts?
No. All inserts are OEM and manufactured strictly according to customer drawings.

Q3: What materials can be used?
Material selection is based on drawing requirements and hot runner operating conditions, including corrosion and temperature resistance.

Q4: Can these be used in multi-cavity hot runner molds?
Yes. Dimensional consistency and repeatability support multi-cavity mold applications.

Get a Quote

Send your drawings, material specification, tolerance requirements, and order quantity. Senlan Precision will provide a technical quotation for corrosion-resistant inner-ground rounding core inserts manufactured exactly to your hot runner system requirements.