During the injection molding process, when the molten plastic meets in the form of multiple strands in the cavity due to the holes in the insert, the areas where the flow rate is discontinuous, and the area where the filling material flow is interrupted, a linear weld seam is produced because it cannot be completely fused. In addition, when the gate injection molding occurs, a weld seam will also be formed, and the strength and other properties of the weld seam are poor. The main reasons are as follows: Pvc Injection,Precision Plastic Injection Mould,Oem Plastic Injection Crate Mould,Plastic Injection Mould Suzhou Dongye Precision Molding Co.,Ltd. , https://www.dongyeinjectionmolding.com
I. Summary
The mill is intended for manufacturing round pipe Φ32mm-Φ89mm with thickness of 1.5mm-4.5mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank with its subsequent welding into tube, edge heating by means of solid state high-frequency welder, longitudinal seam welding in rolls of tube welding machine, cooling, further sizing or shaping and on-stream cutting of endless tube in measured lengths.
Finished product will be of round, square or rectangular pipe
II. The technical flow of the production line
{SteelTape}→→ Double-head un-coiler →→Strip-head Cutter and welder→→
Spiral Accumulator→→Forming section(Flattening unit +Main driving unit +Forming unit +Guide unit +High frequency induction welding unit +squeeze roller)+ De-burr frame →→Cooling unit →→ Sizing unit and straightener →→Flying saw under computer-control →→ Run-out table
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2.Is to roll the steel strip of different sizes to the corresponding tube blanks of straight seam continuously through roll type forming, cage roll forming and FF/FFX forming ,then heated the tube edges to the welding temperature via high frequency induction or contact heating and completed the welding under the extrusion of the squeeze roller, after cooling ,sizing and strightening to be the requested straight seam steel pipe. Mainly composed by the forming section, the welding section, the sizing section, the transmission system and the electrical system etc.
ApplicationÂ
1. Water pipe
2. Heating pipe
3. Low-pressure process pipeline
4. Low pressure fire fighting pipeline
5. Sewage Pipes
6. Steel Scaffolding Pipe
7. Wire and cable protection pipe
8. Structural support Steel Pipe
9. Industrial Steel Pipes
10. Decoration Pipe
11. Oil & Gas Pipes
Q: Are you manufacturer?
A: Yes, we are manufacturer and trading company. We have our own technical team, and about 86,000 sq.m workshop. Welcome to visit us.
Q: What kind of payment term you can do?
A: We are flexible about payment terms, we can help you on financing also, please contact us for details.
Q: What info you need before you make the proposal?
A: The pipe diameter and thickness range which you need or the profile drawings, material information, you special requirements.
Q: What I should do if I just start a new business?
A: Contact us immediately, we provide free consultant pre-sales service
Q: How do you do QA?
A: We have team do Strict QA
1)  Every gear box will be tested for 8 hours with oil inside to guarantee there is no leak
2) Every shaft will be inspected for the centering jumpiness
3) Every roller will be checked to make sure its tolerance, Critical parts will be inspected for all dimensions
Q: Why I should choose you, what's the different between you and other Chinese supplier
A: We are concentrate on this area for more than 20 years. Our pipe making machine line directly export to US, Poland, Russia, Brazil, Egypt, Venezuela, El Salvador, Kazakhstan, Indonesia, etc.
Processing:
The injection pressure and speed are too low, and the barrel temperature and mold temperature are too low, resulting in premature cooling of the molten material entering the mold and the appearance of weld seams.
When the injection pressure and speed are too high, injection will occur and weld seams will appear. The speed should be increased, and the back pressure should be increased to reduce the viscosity of the plastic and increase the density. Plastics should be dry well, recycled materials should be used sparingly, and weld seams may occur if the amount of release agent is too much or the quality is not good. Reduce clamping force and facilitate exhaust.
2. Mould:
If there are too many gates in the same cavity, reduce the gate or set it symmetrically, or set it as close as possible to the weld seam. The exhaust at the weld seam is poor, and an exhaust system should be set up. The sprue is too large, the size of the gating system is improper, and the gate is opened to prevent the melt from flowing around the insert hole, or use as few inserts as possible. If the wall thickness changes too much, or the wall thickness is too thin, the wall thickness of the workpiece should be uniform. If necessary, a fusion well should be opened at the fusion seam to separate the fusion seam from the workpiece.
3. Plastic aspects:
Lubricants and stabilizers should be appropriately added to plastics with poor fluidity or heat sensitivity. Plastic contains a lot of impurities, if necessary, replace the plastic with good quality.
Best Selling Steel Pipe Forming and Sizing Mill
Model NO.: FQ18
Roll Forming Machinery: Roll Forming Machinery
Certificate: Ce & BV
Packaging Details: Pallet & PE Film
Delivery Detail: 60 - 90 Days
Technique: ERW
Material: Carbon Steel
Surface Treatment: Galvanized
Usage: Construction & Decoration, Special Purpose, Oil/Gas Drilling, Mining, Machinery Industry, Chemical Industry, Pipeline Transport
Section Shape: Round
Trademark: FENGQI
Transport Package: Pallet & PE Film
Specification: 50 m*4 m* 9 m
Origin: China
HS Code: 8547901000
Best selling Steel pipe forming and sizing mill