high quality constant force spring for fire damper

Specifications

constant force spring for fire damper

Features of mold spring

 Mold springs with rectangular sections (simplified as mold springs) are mainly used for pressing molds, metal casting molds, plastic injection molds as well as mechanical equipment with precise structure etc.

The springs are mainly made of 50CrVA and characterized by smaller installation space, sound elasticity, excellent rigidity, high precision, rectangular material, surface coating or galvanization in different colors as well as graceful appearance etc.

Why choose us:

1. Professional research and development team.

2. Complete first-class fully automatic production and testing equipment, careful safe package and prompt delivery.

3. Skilled and well-trained work team.

4. Provided competitive price and serious quality control.

5. Passed ISO9001:2008, ISO14001 and ROHs certification.

 6. Over 10 years professional manufacture experience.

How to place an order:

1.What you need to do is send us your design drawing, samples or design concept draft, after that we will assess your products and budget unit price for you.(see bottom charts )

2. We'll communicate with you again about if there is a need for sample making after your approval.

3. Production time of samples: 3 days for simple samples and 7 to 10 days for complicated samples which need mold open.

4. For customers of first cooperation, we can make a proof for free to show our capacity and high efficiency service to you. As for particularly complicated samples, we will communicate with you separately.

5. Mass production delivery: usually delivery time is 10-15 days, but we can try 7-10 days if it is a rush order. It depends on production plan if it's a sizable order.

6. Packaging: as to complicated products, we can special design based on your packing requirement.

7.Our freight advantage:

  a) If you are worrying about freight trouble because of your small quantity goods, it will be the best choice to use express. We will offer you the cheaper express price than the official UPS or DHL; for example, 100kg goods only need 6usd/kg and 50kg goods only 7usd/kg. If you just place an order for 1000pcs, you only need to pay very little express charges and gain the fastest delivery.

   b) If you place a large order, we will help you ship goods by sea, and we are very experienced to handle with it, we can organize all kinds of goods a whole container and recommend best vessels agent for you. 

About us:

Dongguan City Yisen Precision Spring Co., Ltd. (Since 1998) is a high technology hardware company with more than 200 workers, and has been specializing in designing and manufacturing springs, hardware and spring making machines. We've gained worldwide customers' trust with our high design level, top class quality, high grade services and competitive prices, which make us become the supplier for many famous companies in many business lines in the world. Our company has been certified by GB/T19002-1994 idt ISO9002:1994 management system in order to upgrade the whole quality management and provide you with the best quality products and the most valuable services!

My distinguished guest,

Thank you very much for visiting our website, if you would like to know further infos about our products, please just contact us.

Wish you a booming business!

Best regards,

Dongguan City Yisen Hardware Spring Co.,Ltd