S136 Precision Core Inserts | Internal Ground Parts for Bottle Cap Molds

Product Overview

The high flatness S136 core insert is a precision injection mold component developed for plastic bottle cap molding applications. Manufactured from corrosion-resistant S136 stainless steel and finished with precision inner grinding, this core insert delivers stable dimensional accuracy, controlled flatness, and reliable performance in multi-cavity injection mold systems.

Key Features & Technical Advantages

• S136 stainless steel with excellent corrosion resistance

• Precision inner grinding for controlled inner diameter and concentricity

• High flatness to ensure uniform sealing and part consistency

• Stable performance under high-cycle injection molding conditions

• Suitable for multi-cavity bottle cap mold structures

• Fully customized production based on customer drawings (Built-to-Print)

Applications & Industry Use

• Plastic bottle cap injection molds

• Packaging closure and sealing component molds

• Multi-cavity injection molds requiring tight flatness control

• Injection molds operating in moisture-sensitive environments

Mold Structure & Design Description

The core insert is installed at the forming area of the bottle cap mold, directly influencing inner geometry, sealing performance, and dimensional repeatability. Precision inner grinding ensures consistent wall thickness and alignment with mating cavity components. The insert design, tolerances, and interface geometry are fully manufactured according to customer-provided drawings.

Manufacturing Capability & CNC Machining Capacity

Senlan Precision manufactures S136 core inserts using controlled high-precision processes:

• CNC milling and grinding equipment from MAKINO

• Precision turning systems from HARDINGE

• Internal grinding for high flatness and inner diameter control

• EDM and fine finishing for complex geometries

All machining operations strictly follow drawing-defined tolerances and surface requirements.

Custom Development & OEM Cooperation Process

1. Review of customer drawings and technical specifications

2. Material confirmation and process planning

3. CNC machining, inner grinding, and finishing

4. Dimensional inspection and flatness verification

5. Final cleaning, marking, and export packaging

All products are supplied under OEM / Built-to-Print cooperation without standard catalog limitations.

Quality Control & Export Experience

• Incoming S136 material inspection and traceability

• In-process dimensional control during machining and grinding

• Final inspection based on drawing tolerances and flatness requirements

• Stable export support for international mold manufacturers

• Inspection reports available upon request

Related Products

• Bottle cap mold core inserts

• Mold cavity inserts and threaded cores

• Multi-cavity injection mold components

• Custom stainless steel mold spare parts

FAQ (Technical & Purchasing)

Q1: Why is S136 suitable for bottle cap mold core inserts?
A: S136 offers strong corrosion resistance, good polishability, and dimensional stability for packaging mold applications.

Q2: How is flatness controlled during manufacturing?
A: Flatness is achieved through precision CNC machining and controlled inner grinding processes.

Q3: Can this core insert be used in high-cavity molds?
A: Yes, it is suitable for multi-cavity and high-output bottle cap molds.

Q4: Do you support replacement or repeat production?
A: Yes, repeat orders and spare part manufacturing are supported based on existing drawings.

Get a Quote

Please submit your drawings or technical specifications to Senlan Precision for a quotation on high flatness S136 core inserts for plastic injection bottle cap molds.