Umbrella is a tool for shading and sheltering from rain. It is generally made of tarpaulin and plastic cloth.
In China, the umbrella was invented by Lu Ban’s wife in 1000 BC, and the umbrella is called “movable house”. In Britain, umbrellas were only used in the 18th century. Umbrellas were once a special item for girls, expressing a woman’s attitude towards love. The umbrella is erected to express loyalty to love; the left hand holds the open umbrella, which means: “I have no free time”; the umbrella slowly shakes, which means that there is no confidence or distrust of the umbrella; the umbrella is leaning on the right shoulder , I don’t want to see you again.
Summer is the intensive time for umbrellas to leave the country, so do you know how umbrellas are made? Today, I will introduce you to the whole process of making umbrellas. Let’s start now~
Umbrella shaft production
To make an umbrella, first use 1mm low carbon steel, (as long as a little carbon content is just enough to strengthen the steel, so that the skeleton can withstand strong winds, but not hard enough to make the machine unable to shape) a hollow umbrella shaft to support it. Umbrella cloth with skeleton. The forming of the skeleton is gradually formed by rolling. Previously published articles on rolling: the manufacture of truck wheels; the production of iron rings; analysis of rolling lines.
1. Umbrella shaft rolling
The feeder feeds the steel belt into three sets of rollers. The first set of wheels bends the two sides of the material up to form a U shape, and then two sets of rollers are used to roll the material into a round tube step by step.
Instead of using a solid iron rod, the steel belt is rolled into a round tube like this because the umbrella shaft is hollow after rolling, which is lighter, easier to use, and more convenient to carry.
Two, steel pipe welding
The formed steel pipe encounters the coolant, and then passes through the electrode metal ring
There is 50,000 watts of electricity passed here. The electrodes allow the current to pass through the steel. The energy is high enough to heat the steel to 2500°F. The edges will melt. The coolant will reduce the temperature of the roller so that it will not damage the roller. Then it is pressed by the roller. Shaped so that the edges are completely pressed together.
The joints of the pressed round pipes are rough due to the melting and rolling joints. It is necessary to squeeze out the excess steel while it is hot to make the round pipes smoother.
Three, cutting umbrella shaft
The round tube after roll forming needs to be cut into 26 feet long/section.
The cutting method is follow-up cutting, and the cutting machine needs to be consistent with the molding speed to perform the cutting work.
One half is used for the upper part of the umbrella shaft, and the other half is used for the lower part of the umbrella shaft.
The other part of the round tube needs to be molded into the lower half of the umbrella shaft and pressed into a thinner hexagonal tube so that it can be stuffed into a thicker tube, so that the upper part of the umbrella can be folded down to form a telescopic The tube is easy to fold up.
After all the pipes were formed, they were cut into ten feet long and sent to be plated with silver paint to prevent rusting due to rain.
3. Umbrella shaft assembly
First, you need to punch holes in the upper round tube to hold the small metal shrapnel and keep the umbrella open.
After the shrapnel is put in the hole, connect the two tubes again, and then put a spring in the upper part of each tube. When the umbrella is closed, the spring will compress in the tube; press the open switch and the spring will bounce the umbrella. The two pipes are separated.
Then install the black plastic cap on the tube to seal the spring inside
Install plastic cover
Then install the brace ring that can slide on the smooth tube
Umbrella bone making
To make an umbrella, eight ribs are needed. Each rib is connected by two aluminum tubes and fixed with a steel pin similar to a hinge.
Umbrella bone making
The umbrella can be opened and closed like an elbow. After the ribs are installed, connect each one with a thin wire, then fix the end of the rib in the groove of the plastic cover, and then fix the wire on the brace ring.
The skeleton of the umbrella is complete.
Umbrella cloth production
1. Cut umbrella cloth
First, you need to cut the black nylon cloth into triangular pieces
Nylon cloth is used because it is light and tough, and it dries quickly after being wet, but it is not waterproof, but the design of the umbrella is to let the rain flow away before the umbrella cloth is wetted by the rain, so the umbrella will not cause You get wet
2. Sewing umbrella cloth
To make a 41-inch umbrella cloth, you need to use eight triangular nylon cloths. After the umbrella cloths are cut, they are sewn to make an octagonal umbrella surface.
3. Umbrella cloth installation
First, sew the nylon cloth on the end of the metal umbrella rib, and then the worker hand-sews the umbrella surface to the two points on the umbrella rib.
One in the middle and one near the top of the rib
Four. Install the handle
At the end of the umbrella, add a plastic handle
Install the handle
At this time, just press the button to open the umbrella ↓
In this way, an umbrella is completed.