Ningbo (P&M) Plastic Metal Products Co., Ltd. has 17 years of mold manufacturing technology and can customize customized plastic shell parts moulding. We provide professional customized customized plastic shell parts moulding services, and we are a professional customized plastic shell parts moulding manufacturer. We have sufficient experience in selecting product raw materials and mold materials. In the process of customizing customized plastic shell parts moulding, our factory can provide one-stop service. We have design and production capabilities related to customized plastic shell parts moulding, such as: CAD design, mold manufacturing, injection molding, plastic product production, assembly and other technologies.lastic product production, assembly and other technologies.
In addition, our company has established cooperative relationships with plastic raw material suppliers, printing manufacturers, etc. to ensure the supply of raw materials and printing quality. Through our rich experience and perfect supply chain, our company can provide customers with high-quality customized customized plastic shell parts moulding products to meet their specific needs. At the same time, we have 10 years of professional foreign trade service experience, understand the foreign trade process, and better serve our customers. For customized plastic shell parts moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.


Customized plastic shell parts are a comprehensive project integrating appearance, structure, protection and assembly. Its analysis needs to go beyond individual parts and be conducted from the perspective of the entire product system. The following is a comprehensive analytical framework covering all key dimensions from design to mass production.
In light of the characteristics of the shell, the following issues require special attention:
The contradictory unity of appearance and structure
Parting line: Analyze whether the position of the parting line affects the main appearance surface. Excellent design will hide it in the edges or grooves.
Surface treatment: Planned for spraying or electroplating? This requires reserving process tolerances (such as the thickness of the spray film) at the design stage and selecting compatible materials (such as electroplated grade ABS).
Large flat surface: This is the "disaster zone" of the shell. The inevitable slight shrinkage and deformation must be concealed by designing micro-curved surfaces (R-corners), decorative edges or bite patterns.
The performance and cost game of material selection
Universal shell: ABS remains the king of cost performance, with the best overall strength, appearance and processability.
High-strength/weather-resistant housing: PC/ABS alloy enhances impact resistance and heat resistance, and ASA has excellent resistance to ultraviolet aging.
Transparent shell: PC (high strength and impact resistance) or PMMA (acrylic, higher hardness and more scratch-resistant, but more brittle).
Food/medical contact: PP, PE or specific grades of ABS/PC that comply with FDA or USP standards must be used.
The "one-time investment" and long-term returns of molds
Hot runner vs. cold runner: For multi-cavity or large shells, although hot runners increase mold costs, they can save raw materials, improve filling, and shorten the cycle. In the long run, the benefits are significant.
Surface treatment: The polishing (mirror finish, light saving) or etching (sun exposure) grade of the mold is directly replicated onto the product surface, which is the source of texture.
Exhaust and cooling: Poor exhaust can cause the surface of the casing to burn. Uneven cooling can cause warping and affect assembly.
The "Devilish details" of process control
Pressure-holding control: This is the most crucial parameter to prevent the shell from shrinking (especially on the back of the screw column), and it requires meticulous adjustment.
Gate design: The position and type of the gate affect the strength and location of the weld line. It is necessary to guide it to non-critical or concealed areas through mold flow analysis.
When evaluating a shell supplier, in addition to general capabilities, please be sure to examine:
Question: "Can you show a case of a shell with similar size and surface requirements?" Take a look at the physical parting line and the surface treatment effect."
Question to the engineer: "For my shell design, what potential issues will the DFM report focus on?" (Looking forward to hearing about: large-scale flat processing, snap strength, demolding slope, weld line position, etc.)
Check the production line: "Is there a clean spray booth in the workshop?" How can we ensure that the shell is not scratched during injection molding and transportation? (Is there an independent packaging station?)
Quality inspection: "What are the standards and lighting conditions for visual inspection?" How to simulate and test the insertion and extraction life of the snap?"
�� summary and action suggestions
Analyzing custom plastic casings is essentially a systematic project that manages to achieve the best balance among appearance, functionality, cost and delivery time.
The course of action for you
Clarify priorities: At the early stage of the project, determine whether the appearance, cost, or strength of this shell comes first. This will determine the tendency of all subsequent decisions.
Investment in DFM and mold flow analysis: For the shell, this initial investment can almost certainly avoid the expensive mold modification and mass production issues in the later stage, making it the most cost-effective investment.
Making physical prototypes: Before mold opening, use 3D printing or CNC to make prototypes, and conduct actual feel, assembly and initial structural verification. This can discover many problems that cannot be seen on 3D models.
We are a customized plastic shell parts moulding manufacturer, providing high-quality customized plastic shell parts moulding manufacturing. As long as you want to customize/develop customized plastic shell parts moulding products, you can find us. We have professional injection mold design and mature manufacturing technology, providing you with one-stop service, from product design-mold making-product production-product packaging-product transportation, we can help you in every link. As long as you come to us, we will provide you with the ultimate service and satisfy you in terms of product quality, production time, information dialogue, etc.
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Product Name |
Treadmill moulding |
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Pls provide |
2D, 3D, samples, or the size of the multi-angle pictures |
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Mould Time |
20-35 Days |
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Product time |
7-15 Days |
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Mould precision |
+/-0.01mm |
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Mould life |
50-100 million shots |
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Producing Process |
Audit drawings - mold flow analysis - design validation - Custom Materials - mold processing - core processing - electrode machining - Runner system processing - parts processing and procurement - machining acceptance - cavity surface treatment process - complex mode Die - The entire mold surface coating - Mounting plate - mold sample - sample test - sending samples |
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Mould cavity |
One cavity, multi-cavity or same different products be made together |
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Mould material |
P20,2738,2344,718,S136,8407,NAK80,SKD61,H13 |
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Runner system |
Hot runner and cold runner |
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Base material |
P20,2738,2344,718,S136,8407,NAK80,SKD61,H13 |
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Finish |
Pitting the word, mirror finish, matte surface, striae |
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Standard |
HASCO, DME or dependent upon |
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Main technology |
Milling, grinding, CNC, EDM, wire cutting, carving, EDM, lathes, surface Finish, etc. |
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Software |
CAD,PRO-E,UG Design Time: 1-3 days (normal circumstances) |
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Product material |
ABS,PP,PC,PA6,PA66,TPU,POM,PBT,PVC,HIPS,PMMA,TPE,PC/ABS,TPV,TPO,TPR,EVA,HDPE,LDPE,CPVC,PVDF,PPSU.PPS. |
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Quality system |
ISO9001:2008 |
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Establish time |
20days |
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Equipment |
CNC,EDM,Cutting off Machine,plastic machinery,etc plastic suitcase mould zhe jiang |




We are Custom Plastic Mold factory. Our factory is plastic injection mold maker. we has 17 years of experience in professional custom plastic mold and 10 years of foreign trade experience. We are custom Plastic Mold supplier. We can provide custom Plastic Mold service. Our factory can make the Injection molded plastic parts, and the quality of the products will satisfy you.
We have more than 50 high-end machines and hundreds of engineers and designers. We can provide one-stop service, from product design - mold making - product production - product packaging - transportation. We have a complete production chain. We can meet all your requirements.
Professional custom mold service, Plastic mold design and manufacturing .plastic product production, product design, mold design, blow mold customization, rotational mold customization, die-casting mold customization. 3D printing services, CNC manufacturing services, product packaging, customized packaging, shipping services.









We always adhere to the principles of quality first and time first. While providing customers with the highest quality products, try to maximize the production efficiency and shorten production time. We are proud to tell every customer that our company has not lost any customer since its establishment.If there is a problem with the product, we will seek a solution actively and take responsibility to the end.
Q1: Are you trading company or manufacturer ?
A: We are manufacturers.
Q2. When can I get the quotation?
A: We usually quote within 2 days after we get your inquiry.
If you are very urgent, please call us or tell us in your email so that we can quote for you first.
Q3. How long is the lead-time for mold?
A: It all depends on the products' size and complexity. Normally, the lead time is 25 days.
Q4. I have no 3D drawing, how should I start the new project?
A: You can supply us a molding sample, we will help you finish the 3D drawing design.
Q5. Before shipment, how to make sure the products quality?
A: If you don't come to our factory and also don't have the third party for inspection, we will be as your inspection worker.
We will supply you a video for production process detail include process report, products size structure and surface detail, packing detail and so on.
Q6. What is your payment terms?
A: Mold Payment: 40% deposit by T/T in advance, 30% second mold payment before sending out the first trial samples, 30% mold balance after you agree the final samples.
B:Production Payment: 50% deposit in advance, 50% before sending out the final goods.
Q7: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit for best quality products.
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.