Frequently Asked Question
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All FAQs for reference
FAQ about Precision Manufacturing
How To Choose The Right Manufacturer For Precision parts?
You can find lots of precision manufacturing factories in China, however, it is not easy to find one you can count on.
If you’ve ever had a bad experience with an unreliable manufacturing partner, then you would just feel how stressful and frustrating it can be when every time parts are delayed to deliver or out of spec.
Be it the high price, lack of quality control, poor communication, or doubts about legitimacy, there’s something to worry about.
To avoid these problems, we should consider some of the following important factors.
Firstly, choose a manufacturer that is experienced with a strong sense of responsibility. Overall, they will be able to better support your business.
Secondly, choose a supplier with flexible manufacturing capabilities. One-stop service support for your diverse needs can be provided
Thirdly, it is important to choose a supplier with a good quality control system. In other words, consistent high quality will be guaranteed.
Finally, customer service is another important thing. Be sure to choose a partner who can quickly understand your exact requirements and give you the right answers quickly.
As a reliable precision manufacturing company for over 10 years, we have always been standing up for our customers and done our best to solve their problems.
There is no doubt that when you need custom manufacturing services, we are the right partner for you.
Does It Support Fast Delivery？
Of course, we support rapid prototyping, quick sample preparation, and door-to-door fast delivery.
How To Ensure Efficient Communication?
Our sales team has many years of experience in foreign trade business, the staff you interface with are experienced in their English language skills, and from time to time in every month, they will go into the factory for product learning.
How To Guarantee Quality Control?
We will strictly comply with the ISO 9001 quality management system. First article inspection program is also available on request.
The quality management procedures of IQC, PQC, IPQC, FQC and OQC run through the entire production process, from incoming inspection, process inspection to outgoing inspection.
The corresponding inspection reports will be issued in every stage, meanwhile, the quality control effect can be guaranteed together with irregular unannounced inspection.
Not only can we perform sample inspections based on AQL criteria, but we can also use automated inspecting equipment to conduct 100% full inspections to ensure high quality.
In addition, unannounced inspections and assembly checks are also available if necessary.
What kind of after-sales support do you offer?
We adjust accordingly to your business’s progression, growing with you one-on-one from prototype to production.
After order placed, in addition to weekly follow-up and feedback on production & shipping progress, we also will confirm with our clients the acceptance of the parts at the first time, as well as the actual application of the product after QC passes.
If there are any unacceptable or not up-to-spec parts at the time of acceptance, we will rework or refund without any reason.
What distinguishes you from other precision manufacturing suppliers?
In the world of precision manufacturing, competition is fierce, and the secret to our rapid growth is that we always put ourselves in our customers’ shoes and do our best to solve problems for them.
As the market becomes more competitive, quality, pricing and delivery have become the most essential elements to measure in the precision manufacturing world, but there is much more than that.
We are committed to long-term value creation. Responsibility, professionality, high cost effectiveness, scalability are the fundamental attributes of us, these are also the essentials that we applies to every client’s order.
We have optimized the manufacturing process better than anyone in the industry, working closely with material suppliers and shipping forwarder to reduce the costs on your behalf as much as possible, making precision parts an affordable option for anyone.
Whether to safeguard the intellectual property of the customers?
Every creative idea or design and corresponding product development is worthy of respect, and as your closest manufacturing partner, we should safeguard our clients’ achievement of their innovation on their behalf as much as possible.
We have taken every measure to protect every piece of information submitted. Every order placed is considered your intellectual property.
So please rest assured that your every idea, design and custom parts will belong to you.
Is sindparts legal?
We are a legally registered company in China(Biz No:91350200MA8UEWBK6C), we have worked with many customers and got good comments, we also support third-party organizations to verify our factory.
We have no MOQ required, which lowers the threshold of our cooperation and allows you to run through our entire manufacturing process from the beginning of a small trial order. We guarantee that what you hold will exceed your expectations.
FAQ about CNC Machining
How To Reduce The Cost Of CNC Machined Parts?
The costs associated with CNC machining principally consist of material costs, machining time and defect rate.
Firstly, material cost is the most direct cost, through the establishment of long-term steady cooperation with some leading material suppliers.
We can get the best material price under the premise of the quality of materials, especially for batch manufacturing, we can achieve the most optimal costs of sourcing.
Secondly, machining time determines the machining cost of the whole production.
Optimization of machining process and improvement of machining facilities can greatly improve the machining efficiency and reduce the defect rate, which in turn reduces the unit cost of production.
Lastly, defect rate of the workpieces directly affects the unit loss of it, effective control of the defect rate can reduce unnecessary losses.
With years of experience, we will strive to optimize every factor of the machining process so as to enhance our competitiveness.
What Tolerance Criteria Do You Guarantee?
We guarantee to strictly follow the tolerances on your request. For unspecified tolerances, we will follow the standards of ISO 2768-m(medium) or ISO 2768-f(fine) by default.
Geometric tolerances can be down to 0.005 mm, but must be clearly indicated in the technical drawing.
What Cosmetic Criteria Do You Guarantee?
Generally, as machined parts should be free of sharp edges and no surface defects like scratches, dents, rust, stains, blemishes, hang marks, dirt inclusions, etc.
In order to get a better appearance, some post-processing or finishing methods can be used to improve the aesthetic of the machined parts.
What Is The MOQ For CNC Machining？
No MOQ required, we can help you turn your design into reality at a fast turnaround time.
FAQ about Die Casting
How Many Steps Are There In The Die Casting Process?
The standard die casting process involves the injection of high pressure molten metal into a steel mold.
The die casting process typically consists of six main stages, as follows.
Clamping ->> Injection ->> Cooling ->> Ejection ->> Trimming ->> Finishing/Post-processing
What Are The Common Types Of Die Casting Processes?
Cold chamber die casting and hot chamber die casting are the two common types of die casting processes.
The cold chamber die casting process is primarily applied to high melting point alloys such as aluminum, magnesium, some copper and iron alloys.
The hot chamber die casting process is ideal for zinc alloys, lead alloys, copper and other low melting point alloys.
How Long Is The Life Span Of Die Cast Mold In General?
The lifespan of a mold depends on its material ,heat treatment, and wall thickness of the castings.
Generally, the lifespan of a die varies between 50,000 and 250,000 shots.
But please rest assured that the tooling charge is refundable once the minimum order quantity is reached, and no further tooling charge is required for the next order.
Do You Support Multi-Cavity Molds for Die Casting?
We will design multi-cavity molds based on factors such as the size and weight of the workpiece, thus improving manufacturing efficiency.
FAQ about Injection Molding
How To Reduce The Cost Of Injection Molded Parts?
The primary costs in injection molding are associated with the following three factors:
- Tooling costs: depend upon the total cost of designing & fabricating the mold.
- Material costs: depend upon the volume of raw material and its unit price.
- Production costs: depend upon the efficiency of the production cycles.
In general, tooling costs are relatively constant, independent of the number of parts manufactured, while material costs and production costs are determined by the production volume.
For small batch production, tooling costs are a relatively large part of the total, so the focus should be on how to simplify the tooling fabrication.
In contrast, in high-volume manufacturing, the tooling cost is negligible, when the main consideration should be to minimize the thickness of a design and the injection molding cycle time.
How Long Do Injection Molds Last?
The lifespan of an injection mold is measured in its expected shots. Where a shot represents one cycle in the injection molding process.
So in essence, the number of shots directly correlates to the maximum number of parts an injection mold will be able to produce in its lifetime.
Factors that affect the longevity of the injection mold as follow:
- Operating conditions
- Time between production runs
- Cycle times
- Injection mold material
The lifespan of our mold can be up to 500,000 shots.
Whether To Support Multi-Cavity Mold for Injection Molding？
Whether to use multi-cavity molds depends on the size of the injection molded part and the order quantities to achieve the best cost-effective.
What Are The Benefits And Drawbacks Of Injection Molding？
1. Benefits of injection molding:
- Lower level of waste
- Suitable for high volume manufacturing
- An attractive visual appearance available
- Broad range of materials
2. Drawbacks of injection molding:
- Higher start-up and tooling charges
- Longer delivery time due to injection molds need to be specially manufactured
- Costly for design changes
FAQ about Surface Finishing
What Are The Important Considerations For Surface Finish?
To get better aesthetics, it is best to define the A-side and a B-side in your design in advance to ensure that the most important areas are free of defects.
For the A-side of the part, that is the critical surface, note that there should be free of defects such as scratches, stains, hanging marks, and other blemishes, etc. Instead, the B-side, usually the secondary surface, could be allowed with minor defects such as hanging marks, but should try to minimize them.
How To Ensure The Aesthetic Requirements Of Cosmetic Parts?
For the cosmetic parts with aesthetic requirements, the following three aspects should be noted:
- Guarantee that the parts as required are free of defects during production.
- Ensure that the definition of A-side and B-side should be considered when surface finishing.
- Packaging should be considered in advance to ensure that there is no damage during shipping.
FAQ about Batch Manufacturing
How Do You Guarantee Quality Consistency Between Batches?
In batch manufacturing, it’s both important and not easy to achieve to maintain consistent quality, so effective inspection programs and methods are necessary.
We will apply the strategy of multi-times sampling inspection, or 100% full inspection with automated inspecting equipment separately according to the actual needs to achieve excellent quality control and ensure high quality delivery.
Whether The Price Remains Fixed Throughout The Contract Duration?
We promise that the price will remain fixed throughout the contract duration.
Since we have optimized our production process, the main factor influencing the final price is the cost of raw materials, unless there is a significant fluctuation in material costs, and we will propose to renegotiate the price in the next contract.
How To Support Rapid Productivity Improvement In A Short Period Of Time？
In the mass production, we will be equipped with automated production lines according to the process characteristics of the required parts, and these automated equipment is very scalable and can be increased or decreased on capacity demand.
Therefore, to improve the productivity is to increase the equipment accordingly and to realize one personnel to multiple machine tools.
How To Support Flexible Lead Time？
In order to meet your flexible delivery needs, we can use automated production lines to increase productivity, double shifts system as needed, and finally, for parts that require iterative production, advance inventory stocking can be achieved.
These above initiatives can fully guarantee flexible delivery time requirements.