6-7TR(D) Rotary Bobbin Case For Computer Pattern Machine
When the machine needs to sew thin sewing materials, the distance between the tip of the hook and the center of the needle should be adjusted to 8-12 mm. Turning an angle clockwise increases the positioning distance; on the contrary, it decreases.
Introduction of MIM bobbin case 6-7TR(D)
6-7TR(D) Rotary bobbin case for computer pattern machine | |||||||||
Item | Material | Production Process | Sintering Temperature | Mold | Custom | ||||
Hook case 6-7TR(D) | Keep secret | Metal Injection Molding | 1550℃ | To be customized | Yes | ||||
Chemical Composition | Due to the particularity of the product, the chemical composition of this product is kept confidential | ||||||||
Hardness range | Hardness: 55-60 | ||||||||
Available Materials | Low carbon stainless steel, titanium alloy (Ti, TC4), copper alloy, tungsten alloy, cemented carbide, high temperature alloy (718, 713) | ||||||||
Finish | Dimensional Accuracy | Product Density | Appearance Treatment | Appropriate Weight | |||||
Roughness 1～5μm | （±0.1%～±0.5%） | 95～100% | Electrolytic polishing | 0.03g～400g） | |||||
6-7TR(D) Computer Pattern Machine, Synchronous Car DY Car Black King Kong Rotary Shuttle
Aperture | 7.94 | Max.sewing speed | 4500r.p.m | |||||
SANME NO | MAKER | PART NO | MACHINE |
| MEEOLEMO | |||
A | B | |||||||
SMH-6-7TR(D) | BROTHER | S35595-901 | BAS-412,416,423,DB2-B742-307 | 2 | 14 | 16#-23# | ||
TYPICAL | GC6-5,6-6,6-7,GN2301,CN2603 | |||||||
TCIIRISHT | MG44BO120 | DY-349-22BZ,-359-22BZ,-340-22 | ||||||
SIRUBA | YF616-X2 | |||||||
6-7TR(DD) Computer Pattern Machine, Synchronous Car DY Car Black King Kong Micro Oil Rotary Shuttle
Aperture | 7.94 | Max.sewing speed | 4500r.p.m | ||||||
SANME NO | MAKER | PARTNO | MACHINE | NEEDLESLoT | NEEDLE NO | ||||
A | B | ||||||||
SMH-6-7TR(DD) | BROTHER | S00982-901 | BAS-350,-360 | 2 | 14 | 16#-23t# | |||
WANGPING | GC0302-D2 | ||||||||
Qinhuangdao Zhongwei Precision Machine Parts Co., Ltd. specializes in the production of metal injection molding parts. The company has long-term strategic cooperation with domestic Yongyao, Desheng, Sanming and other rotary hook production international companies such as Japan's Zovin rotary shuttle, and Italy's Simon and other enterprises. Metal injection-molded hook case, material After joint research and efforts with Central South University, the products produced by the company not only have good wear resistance, but also have high hardness. Each year, Desheng supplies 600,000-800,000 hook cases, and 10 other manufacturers. -300,000 bobbin case supply.
Correctly adjust the position of the industrial sewing machine hook
1. On the premise that the needle is installed correctly, the needle moves from top to bottom and the hook rotates. When the needle is lowered to the lowest position, the tip of the hook should be within the range of 14° to 18°, and 10 to 12 mm from the center of the needle. That is, when the needle bar goes down to the lowest point, the distance between the shuttle tip and the needle is 3.5-4MM, and when the needle bar rises 2.2MM, the shuttle tip reaches the center of the needle, and the distance from the needle hole is 1.2-1.5MM.
2. When the machine needs to sew thin sewing materials, the distance between the tip of the hook and the center of the needle should be adjusted to 8-12 mm. Turning an angle clockwise increases the positioning distance; on the contrary, it decreases.
How the hook works
The working principle of the rotary hook is usually after the needle rises a certain distance, the hook tip of the rotary hook bed starts to hook into the thread loop, and the hook tip hooks the thread loop and continues to rotate. The thread loop is hooked by the hook of the shuttle frame, at this time the needle should rise about 2 mm from the lower limit position.
The thread splitting hook on the rotary hook frame should allow time for the end of the thread loop to move to the back of the guide rail when the thread loop is about to approach. Hook the wire loop at 45° on the convex surface of the frame, continue to rotate, and the end of the wire loop is hooked on the line splitting hook.
In order to make the thread loop slide smoothly on the surface of the shuttle rack, the beveled edge of the tail of the thread guide pulls the thread end of the thread loop away from the surface, and the rear of the thread loop is hooked by the hook of the hook of the shuttle rack, and moves toward the shuttle. The bottom of the frame slides down, and at this moment, the needle is withdrawn in the hook mechanism.
Because the thread passing area of the shuttle frame is very smooth, the thread loop can slide out from the bottom of the shuttle frame smoothly, and when the tip of the shuttle rotates 180°, the thread take-up lever rises, and the remaining part of the thread sent down before the thread take-up lever is taken up. , the hook tip hooks the thread loop and continues to rotate, the first half of the thread loop is under the thread guide, after passing through the 45° slope of the convex surface of the outer frame.
Our Service
Pre-sale | Evaluate according to drawings or products, calculate the price, and submit it to the buyer for confirmation |
On sale | The production process of all products is supported by the production system and delivered according to the mutually agreed time. (If the size of the drawing needs to be changed in the middle, the buyer is responsible for the inconsistency with the original drawing. If we fail to meet customer requirements during the modification process, a full refund will be given) |
After sales | After handing over the product, we will seal all the buyer's molds for safekeeping. (Problem solving) If there is a second or third revision in the production process, we will reply within 1 hour at the earliest, and we will solve customer problems within 8 hours at the latest depending on the situation of products that need to be evaluated. |
Why Choose US?
Our R&D team | Zhongwei Precision Co., Ltd. and Central South University have a R&D team of 10 people. They develop more than 400 products each year, which is more than 68% higher than the same industry, and have obtained more than 20 patent certificates. |
Our technical team | Zhongwei Precision has 5 professional engineers in the field of metal injection molding, and 15 technicians responsible for workshop management. |
Our philosophy on quality management | 1. Focus on the customer |
Device resources | The company has 10 MIM production lines, CNC and intelligent automated production workshops for production lines, which can guarantee the production of millions of MIM parts per day. |
System Certification | ISO9001, ISO14001, IATF16949 certification |
| Port | It is 200 kilometers away from Tianjin Port, and goods can arrive at the port within 24 hours. |
Process After Sintering
1. Heat treatment: annealing, carbonization, tempering, quenching, normalizing, surface tempering
2. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;
3. Surface treatment: anodizing, powder spraying, chrome plating, painting, sandblasting, nickel plating, galvanizing, blackening, polishing, bluing, etc.
Moulds and Inspection Fixtures
1. Mold service life: usually semi-permanent. (except for lost foam)
2. Mold delivery time: 10-25 days, (according to product structure and product size).
3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.
Quality Control
1. Quality control: the defective rate is less than 0.1%.
2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements.
3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine.
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