There is a magnet embedded in the plastic part, and the thickness of the rubber is required

The thickness of the magnet lagging is 2mm, and there can be flow patterns when molding.

Magnets: Magnets are substances that can attract or repel each other, and if the tiny molecules inside an object can be arranged in the same direction, it will become a magnet. The composition is iron, cobalt, nickel and other atomic structures are special, the atoms themselves have magnetic moments, and the general arrangement of these mineral molecules is chaotic.

The magnetic regions do not show magnetism when they affect each other, but under the guidance of external forces (such as magnetic fields), the molecular arrangement tends to be in the same direction, which is commonly known as magnets. Iron, cobalt, nickel, is the most commonly used magnetic substance, basically magnets are divided into permanent magnets and soft iron, permanent magnets are added to strong magnetism, so that the spin of magnetic substances and the angular momentum of electrons are arranged in a fixed direction, soft magnetism is to add current (also a method of adding magnetic force) and other currents to remove soft iron will slowly lose magnetism. ‍

Bar-shaped, hoof-shaped magnets in the lab are usually made of steel or certain ferroalloys. Steel is prone to rust, so people paint magnets to prevent rust. Generally, the N pole is painted blue, and the S pole is painted red, and the color is bright and easy to distinguish.

However, if you look closely, you will see that the ends of the magnet are generally not painted. What is the reason for this? It turns out that the two ends of the magnet are the most magnetic, and they are used to pick up iron weights.

The attraction of a magnet decreases as the distance between the pole and the object being attracted increases. Experiments have shown that if there is a bar magnet, it can attract a weight of 1 Newton when it comes into direct contact with the iron. However, if a piece of paper is placed between a magnet and a block of iron, its attraction is reduced by half, and it can only attract a weight of 0 5 Newtons.

According to this reason, if the end surface of the magnet is painted, the thickness of the paint layer will greatly reduce the ability to absorb iron. Therefore, paint is not applied to the surface of the poles of the magnet. To test this conclusion, you might want to do the following experiments:

Take a magnet and suck a series of paper clips under the pole until you can no longer pick it up, and note the number of paper clips that are sucked back. Attach a thick piece of paper to the magnetic terminal and then attract the paper clips in turn, and you will notice that the number of paper clips that can be picked up is significantly reduced.

The injection molded parts are covered with a magnet, which is not easy to do, and the magnet is easy to adsorb to the mold, which is difficult to position.

It is recommended to make an assembled structure, and the magnet will be installed later.

The magnet is easy to adsorb onto the mold and is difficult to locate.

It is recommended to make an assembled structure, and the magnet will be installed later.

There are two schemes: the first is to divide the product into two parts, one end with a magnet is brewed first, and the other half of the beer is put into the blow mold, and the two parts are fused together. The second solution is a blow mold, with one end of the magnet to make a shrinkage needle to fix the magnet, when the glue blows to the magnet, the fixed needle retracts, and the continuous blowing glue fills the gap of the needle.

The two options depend on the shape and size of the magnet.

Mainly the molding temperature of the product, the adhesion of the two materials refers to the melting of the materials, and the two materials are glued together through the temperature, generally TPE (also known as soft rubber) is wrapped in hard rubber parts, and the general products must be laminated and not easy to tear apart! This practice is also called overmolding, and it will be more convenient if it is done by a two-color machine! Listen to your situation should be two-color injection molding machine, as long as the material grasps their molding temperature, the rest can be adjusted according to the normal plastic, but before this, we must choose a good material, because the TPE material is very targeted!

Plastics should have good adhesion to metal, small dimensional stability (shrinkage), fatigue resistance, etc

This is determined according to the substrate of the package.

The thickness of the magnet lagging is 2mm, and there can be flow patterns when molding. Magnet: A magnet is a substance that can attract or repel each other, and if the small molecules inside an object can be arranged in the same direction, it will become a magnet.

The composition is iron, cobalt, nickel and other atoms with a special structure, the atoms themselves have a magnetic moment, and the general arrangement of these mineral molecules is chaotic.

Cause of the problem: Solution.

1.Caused by oil stains 1Clean the mold.

2.Poor exhaust 2Open exhaust.

Is it the inlet part, or is it a corner? What is the hardness of TPE? Is hard rubber PP, or ABS?

You said almost, the drum cold cover does have to consider how large the diameter of the drum wrap and how thick the rubber plate, I used to use this kind of rubber plate, the adhesive surface of the rubber plate does not need to be polished when pasting, and there is a diamond pattern, of course, there is also a plane that wants to be flat, but the herringbone needs to be carved by itself. As for the quality of the rubber sheet, who uses it knows.