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Basic Info.
- Model NO.
- Zetar
- Surface Finish Process
- Polishing Sand Blasting Heat Treatment
- Mould Cavity
- Single Cavity or Multi Cavity
- Plastic Material
- PP/PC/ABS/PVC/PTFE/POM 400+ Materials
- Process Combination Type
- Single-Process Mode Compound Die etc.
- Application
- Car, Household Appliances, Furniture, Commodity, Electronic, Home Use, Hardware, Custom
- Runner
- Hot or Cold Runner
- Design Software
- Step/STP/Igs/X- T/Stl/CAD/Pde/Dwg
- Installation
- Custom
- Certification
- CE, ISO, FDA
- Standard
- Custom
- Customized
- Customized
- After-sales Service
- Yes
- Product Material
- Plastic
- Colors Available
- Custom Colors
- Certifications
- ISO9001/Ts16949/QS/ISO14001
- Tolerance
- +/-0.1mm
- Surface Finish
- Texture/Sandy/Mt/Ys/Spi/EDM Finish/Smooth/Glossy
- Transport Package
- Standard or as You Request
- Specification
- Customized
- Trademark
- Zetar
- Origin
- Zhejiang, China
Packaging & Delivery
- Package Size
- 40.00cm * 40.00cm * 40.00cm
- Package Gross Weight
- 10.000kg
Product Description
Company name | Yuyao Zetuo Plastic Products Co., Ltd. |
Mold shaping | Plastic Injection molding(including 3D print and CNC machinery);Plastic Extrusion Mold;Thick-walled vacuum forming;HVAC;Silicone Rubber Molding |
Mold base | LKM;HASCO;DME,etc. |
Mold material | NAK20,S136,P20.718H,738H,45#,etc. |
Mold cavity | Single or Multi |
Tolerance | +/-0.1mm |
Finish | Anodized,Polish,Silk-screen,Painting,etc. |
Sprue gate | Hot/cold runner;pin-point gate,etc. |
Design software | UG,PROE,CAD,SOLIDWORK,etc |
Product material | ABS,PP,PE,POM,PMMA,etc,More than 400 kinds |
Mold life | 100k-500k shots |
Lead time | 25-45 days |
Transportation | By sea, by air or by land as you request |
Package | Standard or as you request |
OEM/ODM | Acceptable |
Certificate | ISO9001:2015,SGS,TS16949 |
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At Zetar, your ideas become reality with ease. Our all-in-one service is designed to simplify your journey from concept to finished product. You'll benefit from design feedback that saves time and minimizes costly revisions, rapid prototyping that brings your vision to life faster, and detailed DFM reports and mold flow analysis that prevent unexpected production issues—all so you can achieve success without the stress of setbacks.
Production Cooperation Process
Production Information
1-Start from part design analysis
2-Mold design drawing and DFM report available so you can see how is the mold going to be before mold making
3-If product is complex,moldflow report will be present as well
4-In house mold making shop ensure you mold quality under well control.
5-Normally it takes 20-40 days to make mold,precise time depends on part design
2-Mold design drawing and DFM report available so you can see how is the mold going to be before mold making
3-If product is complex,moldflow report will be present as well
4-In house mold making shop ensure you mold quality under well control.
5-Normally it takes 20-40 days to make mold,precise time depends on part design
Machine Specs & Factory Pictures
Yuyao Zetuo Plastic Products Co., Ltd
Our company is located in Yuyao mould City, Ningbo, Zhejiang Province. Complete supporting facilities, convenient transportation and professional team bring you safe and guaranteed service and superior quality
We have professional engineering team which has more than 7 engineers who is good at plastic injection mold design, plastic injection molding process as well as metal stamping works.
Sales team are thoughtful and good at understanding your idea and points, where help to make your work much eaiser. 24*7 comminication service, whenever you need us, we are here for you.
Our company has In-house tooling shop- fully equipped 6000 square feet tool room,making sure your molds making in house, providing free mold routine maintenance,and also mold repair work if you need.
Our company has In-house tooling shop- fully equipped 6000 square feet tool room,making sure your molds making in house, providing free mold routine maintenance,and also mold repair work if you need.
Meanwhile 90 ton - 1100 ton injection molding machines 45 sets,30000 square feet injection molding room including 250 square feet M7 class clean room.We can produce parts from 0.01pound to 13 pounds.
We can produce all kinds of plastic injection molds, all kinds of plastic parts can be customized, very understanding of the market, at present we have established good relations of cooperation with 58 countries, the main markets: America, Europe, Australia and the Middle East. Now the main product types are: Auto plastic parts, food and health products, plastic packaging products, household appliances, plastic accessories, electronic products, stationery, household necessities and so on. If you have the goods you are interested in, please tell me the specifications you need.
We can produce all kinds of plastic injection molds, all kinds of plastic parts can be customized, very understanding of the market, at present we have established good relations of cooperation with 58 countries, the main markets: America, Europe, Australia and the Middle East. Now the main product types are: Auto plastic parts, food and health products, plastic packaging products, household appliances, plastic accessories, electronic products, stationery, household necessities and so on. If you have the goods you are interested in, please tell me the specifications you need.
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FAQ
Frequently Asked Questions
1. What is your terms of payment?
50% Mold cost deposit,balance mold cost +50% production cost paid when samples confimed,Balance production cost paid against copy of B/L. We accept T/T
50% Mold cost deposit,balance mold cost +50% production cost paid when samples confimed,Balance production cost paid against copy of B/L. We accept T/T
2. How about your delivery time?
Generally, it take 40 days ( 30 days do mold and 10 days do mass production).
3.What is the Minimum Order Quantity (MOQ)?
We can custom mold this item with an MOQ of just 1 piece. Typically 500-1000 pieces per design to ensure production economics.
Flexible Handling:For trial orders or special projects, we can negotiate lower MOQs, which may require customers to share part of the setup costs or tooling fees. We are committed to growing together with our clients.
4.How to Get a Project Estimate Easily?
We can still provide a quick assessment and a preliminary estimate even if you only have a sketch, image, or a simple idea.
Sketches, pictures, or ideas can quickly generate a quote, but to provide you with the most accurate quote as soon as possible, Please provide as much information as possible.
From "Won't Fit" to "Perfect Fit": How Zetar Transformed Customer Requirements into a Reliable Product
Abstract
By reviewing a display stand project developed for our customer, this article systematically analyzes the assembly issues that arose during the sample testing phase and a series of secondary quality defects. The customer's primary feedback focused on "parts being too tight and difficult to assemble," accompanied by issues such as uneven surfaces, deformation, cracking, parting line defects, internal marks, sharp residual edges, and missing components. These problems not only affected the end-user experience but also posed significant risks to yield, production cycle time, and long-term durability. This article reviews the process of problem identification and validation, deeply analyzes the root causes, and summarizes comprehensive solutions in structural optimization, process improvement, injection mold modification, and quality verification. This is particularly critical in plastic injection molding projects.
Problem
The original intent of the project was to provide a display stand for figurines that combined both aesthetics and functionality. However, after the stand samples were submitted for approval, the customer reported assembly difficulties. The main issue was that the fit between components was too tight, preventing smooth assembly. The customer wanted a stand that could be easily assembled, remain stable without wobbling after placement, and feature a refined appearance. Yet the feedback on the first batch of samples was: "The parts are too tight; they won't go in even with force!" At the same time, issues such as uneven surfaces and burrs were also observed. This clearly deviated from the customer's core user experience requirements.
In the early stages of the project, we identified risks through drawing analysis and proactively proposed modification suggestions. In fact, such issues are not uncommon in the industry. Some suppliers typically adopt a passive "build-to-print" approach when faced with customer drawings, neglecting the comprehensive evaluation of tolerance stack-up, material shrinkage, and injection mold accuracy. As a result, first samples often suffer from assembly difficulties or even scrap. Our engineering philosophy, however, has always emphasized "front-loaded quality control" and "design for assembly (DFA)."
By reviewing a display stand project developed for our customer, this article systematically analyzes the assembly issues that arose during the sample testing phase and a series of secondary quality defects. The customer's primary feedback focused on "parts being too tight and difficult to assemble," accompanied by issues such as uneven surfaces, deformation, cracking, parting line defects, internal marks, sharp residual edges, and missing components. These problems not only affected the end-user experience but also posed significant risks to yield, production cycle time, and long-term durability. This article reviews the process of problem identification and validation, deeply analyzes the root causes, and summarizes comprehensive solutions in structural optimization, process improvement, injection mold modification, and quality verification. This is particularly critical in plastic injection molding projects.
Problem
The original intent of the project was to provide a display stand for figurines that combined both aesthetics and functionality. However, after the stand samples were submitted for approval, the customer reported assembly difficulties. The main issue was that the fit between components was too tight, preventing smooth assembly. The customer wanted a stand that could be easily assembled, remain stable without wobbling after placement, and feature a refined appearance. Yet the feedback on the first batch of samples was: "The parts are too tight; they won't go in even with force!" At the same time, issues such as uneven surfaces and burrs were also observed. This clearly deviated from the customer's core user experience requirements.
In the early stages of the project, we identified risks through drawing analysis and proactively proposed modification suggestions. In fact, such issues are not uncommon in the industry. Some suppliers typically adopt a passive "build-to-print" approach when faced with customer drawings, neglecting the comprehensive evaluation of tolerance stack-up, material shrinkage, and injection mold accuracy. As a result, first samples often suffer from assembly difficulties or even scrap. Our engineering philosophy, however, has always emphasized "front-loaded quality control" and "design for assembly (DFA)."
At every design review stage, we proactively conduct assembly simulations and tolerance stack-up analyses to assess potential risks in advance,ensuring manufacturability and assembly stability from the design stage. This methodology has helped us earn customer trust and effectively avoid large-scale rework and delays later on. This is particularly critical in plastic injection molding projects.
In our initial response, we believed that "a step difference of 0.1 mm was within the normal range," but the facts proved that this judgment was overly conservative. To thoroughly resolve the issue, the company quickly established a dedicated task force to conduct a comprehensive review and in-depth analysis of the entire workflow covering design, injection molds, and processes. This is particularly critical in plastic injection molding projects.
Through process data review and CAE simulation analysis, we identified the core causes of the assembly difficulty. In addition, the lack of lead-in chamfers and fillet designs made it difficult for components to self-align when tolerance deviations existed. Uneven torque during assembly led to localized stress concentration, becoming a potential trigger for product deformation and cracking. Meanwhile, improper control of process parameters further exacerbated the problem. These apparent issues compounded one another and ultimately manifested as the assembly difficulty and cosmetic defects perceived by the customer. In injection process optimization, attention must be paid to injection mold process parameters.
Solutions
Listening carefully to requirements, translating them accurately, and making agile adjustments. Our core strategy was to precisely convert the customer's scenario-based and experience-driven requirements into executable engineering standards and implement adjustments rapidly.
Redefining the standard of "easy assembly": we confirmed with the customer what "smooth assembly" specifically meant (e.g., gentle one-handed push, no tools required) and translated it into measurable clearance and tolerance requirements (adjusting from positive tolerance to a reasonable small clearance fit).Upgraded packaging protection: dedicated blister trays were designed to prevent deformation caused by compression during transportation.
In our initial response, we believed that "a step difference of 0.1 mm was within the normal range," but the facts proved that this judgment was overly conservative. To thoroughly resolve the issue, the company quickly established a dedicated task force to conduct a comprehensive review and in-depth analysis of the entire workflow covering design, injection molds, and processes. This is particularly critical in plastic injection molding projects.
Through process data review and CAE simulation analysis, we identified the core causes of the assembly difficulty. In addition, the lack of lead-in chamfers and fillet designs made it difficult for components to self-align when tolerance deviations existed. Uneven torque during assembly led to localized stress concentration, becoming a potential trigger for product deformation and cracking. Meanwhile, improper control of process parameters further exacerbated the problem. These apparent issues compounded one another and ultimately manifested as the assembly difficulty and cosmetic defects perceived by the customer. In injection process optimization, attention must be paid to injection mold process parameters.
Solutions
Listening carefully to requirements, translating them accurately, and making agile adjustments. Our core strategy was to precisely convert the customer's scenario-based and experience-driven requirements into executable engineering standards and implement adjustments rapidly.
Redefining the standard of "easy assembly": we confirmed with the customer what "smooth assembly" specifically meant (e.g., gentle one-handed push, no tools required) and translated it into measurable clearance and tolerance requirements (adjusting from positive tolerance to a reasonable small clearance fit).Upgraded packaging protection: dedicated blister trays were designed to prevent deformation caused by compression during transportation.
We quickly formulated a systematic improvement plan covering structural design through mass production validation. At the design level, we redefined tolerance designs for critical mating dimensions and predicted shrinkage rates in regions with different wall thicknesses. By redefining tolerance ranges, we adjusted interference fits to reasonable clearance fits. All insertion ends were equipped with lead-in chamfers and fillet structures, giving components self-alignment capability and significantly improving assembly stability and safety.
In terms of mold improvements, flash risks were eliminated and air traps at flow ends were improved. For gate marks, we adopted more concealed submarine or pin gate designs to achieve smoother surfaces. We applied DOE (Design of Experiments) methods to systematically study the combined effects of temperature, pressure, holding time, and cooling speed, identifying the optimal process window from data. We also established assembly torque standards and quantified assembly smoothness using force-measuring equipment, ensuring consistent user experience through objective metrics. To prevent deformation caused by compression during transportation, we redesigned the packaging structure and adopted customized blister or pulp trays to ensure the stability and safety of each component during transit.
The initial design adopted relatively tight tolerances (positive tolerances) in pursuit of "zero clearance," but under complex structures and material shrinkage, this became an "interference fit," leading to assembly difficulties. The lack of "fault-tolerant" design, such as sufficient lead-in chamfers, meant that even slight deviations caused jamming. This is equally important in plastic injection molding projects.
Testing and Validation
The improved samples underwent multiple rounds of rigorous testing. In blind tests, ordinary users were able to complete assembly easily without excessive force. Durability testing showed that after thousands of assembly and disassembly cycles, no loosening, cracking, or fit changes occurred. Sharp edges and burrs were completely eliminated through inspection, ensuring the product's safety for painted surfaces. Such assembly analysis is also an important step in plastic component manufacturing.
In terms of mold improvements, flash risks were eliminated and air traps at flow ends were improved. For gate marks, we adopted more concealed submarine or pin gate designs to achieve smoother surfaces. We applied DOE (Design of Experiments) methods to systematically study the combined effects of temperature, pressure, holding time, and cooling speed, identifying the optimal process window from data. We also established assembly torque standards and quantified assembly smoothness using force-measuring equipment, ensuring consistent user experience through objective metrics. To prevent deformation caused by compression during transportation, we redesigned the packaging structure and adopted customized blister or pulp trays to ensure the stability and safety of each component during transit.
The initial design adopted relatively tight tolerances (positive tolerances) in pursuit of "zero clearance," but under complex structures and material shrinkage, this became an "interference fit," leading to assembly difficulties. The lack of "fault-tolerant" design, such as sufficient lead-in chamfers, meant that even slight deviations caused jamming. This is equally important in plastic injection molding projects.
Testing and Validation
The improved samples underwent multiple rounds of rigorous testing. In blind tests, ordinary users were able to complete assembly easily without excessive force. Durability testing showed that after thousands of assembly and disassembly cycles, no loosening, cracking, or fit changes occurred. Sharp edges and burrs were completely eliminated through inspection, ensuring the product's safety for painted surfaces. Such assembly analysis is also an important step in plastic component manufacturing.
Conclusion
Through systematic analysis and improvements, we successfully resolved the assembly and related quality issues in the display stand project. The final samples received unanimous customer approval, featuring smooth assembly, refined appearance, and stable structure. Product yield increased to over 98%, and production cycles returned to normal. A closed-loop optimization mechanism was formed across design, injection molds, processes, and quality control.
Zetar has more than 20 years of experience in injection mold design and molding manufacturing, with deep expertise in plastic injection molding, consumer electronics, industrial components, medical devices, flexible materials, and high-performance engineering plastics. We have redefined the role of a manufacturing partner—not merely a production executor, but a strategic partner throughout the entire product development lifecycle. At the concept design stage, we identify potential risks for customers through professional material science analysis, structural feasibility assessment, and process validation, avoiding design rework and significantly reducing injection process development costs, while providing professional custom injection molds and products.
Process expertise: proficiency in multiple forming processes such as injection molding, extrusion, and blow molding to ensure optimal manufacturing solutions. In injection process optimization, we focus on mold tolerance control.
Risk prediction: a 20-year accumulated injection mold process database to identify design risks in advance
Cost optimization: reducing manufacturing costs through DFM (Design for Manufacturability) analysis
Customer value:
Shorten development cycles by 30–50%
Reduce injection mold modification costs by over 60%
Increase plastic injection product yield to 95%+
Accelerate injection production processes and time-to-market
We firmly believe that outstanding products are born from the perfect integration of design and manufacturing. Zetar is committed to becoming the most trusted manufacturing partner for innovative enterprises, transforming every idea into a reliable product and enabling innovation to quickly realize commercial value.
Zetar has more than 20 years of experience in injection mold design and molding manufacturing, with deep expertise in plastic injection molding, consumer electronics, industrial components, medical devices, flexible materials, and high-performance engineering plastics. We have redefined the role of a manufacturing partner—not merely a production executor, but a strategic partner throughout the entire product development lifecycle. At the concept design stage, we identify potential risks for customers through professional material science analysis, structural feasibility assessment, and process validation, avoiding design rework and significantly reducing injection process development costs, while providing professional custom injection molds and products.
Process expertise: proficiency in multiple forming processes such as injection molding, extrusion, and blow molding to ensure optimal manufacturing solutions. In injection process optimization, we focus on mold tolerance control.
Risk prediction: a 20-year accumulated injection mold process database to identify design risks in advance
Cost optimization: reducing manufacturing costs through DFM (Design for Manufacturability) analysis
Customer value:
Shorten development cycles by 30–50%
Reduce injection mold modification costs by over 60%
Increase plastic injection product yield to 95%+
Accelerate injection production processes and time-to-market
We firmly believe that outstanding products are born from the perfect integration of design and manufacturing. Zetar is committed to becoming the most trusted manufacturing partner for innovative enterprises, transforming every idea into a reliable product and enabling innovation to quickly realize commercial value.
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