Product Overview
This precision custom injection mold is specially designed for mass production of large-size PP plastic handle grip parts. Adopting high-grade anti-corrosion mold steel with excellent moisture-proof and rust-proof performance, the mold cavity is finished with standard VDI21 fine texture, which perfectly presents uniform delicate matte surface on the final PP handle products. Optimized mold flow and cooling structure effectively solve common molding problems such as shrinkage mark, deformation, weld line and uneven texture of thick-wall grip components. The mold is widely used for manufacturing tool handles, equipment hand grips, household appliance holding parts and industrial safety handles, delivering stable long-cycle mass production with consistent appearance and dimensional precision.
Core Product Features
1. Excellent Corrosion, Moisture & Rust Resistance
The mold core and cavity adopt high-quality stainless or pre-hardened anti-rust mold steel with professional anti-corrosion surface treatment. It can effectively resist corrosive volatile gas generated during high-temperature PP molding, as well as moisture erosion in humid production workshop environments. The mold avoids rust, spot corrosion and surface oxidation during long-term continuous production and long-term warehouse storage, greatly lowering maintenance frequency, prolonging mold service life and ensuring stable surface quality of batch handle products.
2. Standard VDI21 Fine Texture Surface Treatment
The mold cavity is processed with internationally recognized VDI21 texture finish, delivering uniform, delicate matte grain on the surface of large PP handle grips.
Effectively cover tiny injection molding defects including flow lines, minor sink marks and surface blemishes, significantly improving the finished product yield rate.
The matte textured surface provides comfortable anti-slip hand feeling for the handle grip, avoiding fingerprint and scratch marks in daily use.
VDI21 texture features strong wear resistance, no grain blur or fading after hundreds of thousands of molding cycles, ensuring consistent appearance of every batch of handles.
3. Optimized Molding Design for PP Large Handle Grip
Targeting the structural characteristics of thick-wall, long-size PP handle grips, the mold is equipped with balanced runner system, reasonable exhaust layout and high-efficiency circulating cooling channels:
Balanced melt filling prevents short shot, weld line and uneven shrinkage, effectively controlling handle bending deformation.
Fast uniform cooling shortens molding cycle, improves production efficiency and stabilizes product dimensional tolerance.
The mold structure is reinforced to withstand high injection pressure from PP thick-wall molding, avoiding mold deformation under long-term repeated clamping.
4. Stable Material Adaptability for PP Raw Material
The mold is professionally calibrated according to PP material shrinkage rate, with mold flow analysis conducted in advance to optimize gate position and process parameters. It perfectly matches general-purpose PP, modified reinforced PP, anti-aging PP and other common PP materials, meeting diverse application demands of different handle grips from household, industrial and hardware industries.
5. Durable & Stable Mold Structure
Matched with high-rigidity standard mold base, the whole mold features precise guiding and positioning structure to ensure high mold opening and closing accuracy. Wear-resistant guiding sleeves and positioning components reduce mold wear, guarantee long-term repetitive production precision, and greatly lower the risk of flash, dimensional deviation and texture inconsistency of PP handle products.
Technical Specifications
| Item | Parameter Details |
| Molded Product | Large PP Plastic Handle Grip |
| Applicable Raw Material | PP (Polypropylene) |
| Mold Surface Finish | Standard VDI21 Fine Mold Texture |
| Mold Performance | Corrosion-resistant, Moisture-proof, Rust-proof |
| Suitable Product Type | Hardware Tool Handles, Equipment Grips, Household Appliance Holding Parts |
| Process Advantage | Low defect rate, Stable texture, Anti-deformation for thick-wall parts |
| Production Feature | High batch consistency, Long service life, Low maintenance cost |
![PP Large Corrosion-resistant mold]( "PP Large Corrosion-resistant mold")
Application Scope
This PP large handle grip injection mold is widely applied to manufacture various plastic grip components in multiple industries:
Hardware power tool handles, hand tool anti-slip grips
Industrial mechanical equipment operating handles and safety holding parts
Household appliances, cleaning equipment portable handles
Fitness equipment, outdoor travel equipment plastic grips
Medical devices, testing instruments non-slip holding handles
Our Competitive Advantages
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Professional VDI Standard Texture Processing Capability
We strictly follow international VDI surface standard for mold etching, ensuring uniform grain depth, consistent texture gloss and high repeatability, avoiding local shallow grain, blurred texture or uneven matte effect on large handle surfaces.
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Anti-Corrosion Mold Customized Solution
We select anti-rust mold steel and carry out professional surface passivation treatment as required, adapting to high-humidity production environments and long-term continuous PP molding production, effectively extending mold service life up to 500,000+ shots.
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Pre-Mold Flow Simulation for Thick-Wall Handle Parts
We simulate PP melt filling, cooling and shrinkage in advance to optimize gate layout, exhaust and cooling channels, thoroughly solving thick-wall handle’s common defects such as warpage, sink mark and weld line.
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One-Stop Custom Mold Service
We support fully customized cavity number, gate type, texture grade, mold steel grade and mold base specification based on your 2D/3D drawings. We provide full service including mold design, CNC precision machining, texture etching, mold trial, sample confirmation, packaging and after-sales technical guidance.
FAQ
Q1: Can we change the texture to other VDI grades besides VDI21?
A1: Yes, we support all common VDI texture specifications from VDI12 to VDI42, you can customize matte, fine grain or coarse anti-slip texture according to your handle appearance and anti-slip requirement.
Q2: Is this mold available for other materials like PE, TPE?
A2: Yes, after adjusting shrinkage rate parameters and optimizing molding process, the mold can also be compatible with PE, TPE soft rubber and other polyolefin materials for composite soft-touch handles.
Q3: How to keep the mold rust-proof in long-term storage?
A3: We will spray special anti-rust oil on cavity surface and pack the mold with moisture-proof vacuum bag before delivery. Regular maintenance and anti-rust coating can further extend the service life of the corrosion-resistant mold.
Q4: Can you optimize the mold to realize automatic ejection for high-speed mass production?
A4: Absolutely. We can upgrade the ejection system to mechanical automatic ejection structure to realize full-automatic demolding, saving labor cost and improving production efficiency for large-batch handle orders.
