How to repair plastic products and plastic toys?

2.There are three small ways to repair plastic products: 1

If the hard plastic parts and products (such as pesticide sprays, plastic tubes, plastic shells of equipment, etc.) are broken, the crack can be found as it is, find a piece of plastic hard sheet of the same variety and suitable size, melt it with an iron rod or soldering iron of Kaoheat, and drip it in the crack until the hole is filled, and then soldered flat with a hot soldering iron, and it will stick after cooling.

The reason for the (cracking) crack of the plastic part is mainly due to the excessive stress or stress concentration of the plastic part, and the main factors are injection mold, injection molding process, plastic part and raw materials. The mold is generally opened, not to mention this, if it can't be solved by the following methods, then you have to consider whether you want to change the mold.

1. Injection molding process.

1. If the holding time is too long, the plastic parts will be subjected to excessive pressure, and there will be large residual stress, which is easy to cause cracks in the plastic parts.

2. If the injection pressure is too large, the residual stress will also increase, which is easy to cause cracks in the plastic parts, and the injection pressure should be appropriately reduced.

3. If a large injection pressure must be used during injection molding, in order to reduce the residual stress in the plastic parts, the temperature of the melt and the mold can be reduced, the temperature of the barrel and the mold can be increased, and the cooling time of the plastic parts can be prolonged, so that the oriented molecular chain can be restored in time.

2. Plastic parts. 1. If there is a sharp change in the contour of the plastic part, it is also the place where the stress is concentrated, and cracks are most likely to occur.

2. For plastic parts with embeddings, because the thermal expansion coefficient of metal and plastic is very different, such as the thermal expansion coefficient of thermoplastics is 6-11 times that of steel and 3-6 times that of aluminum, therefore, the inserts will hinder the overall shrinkage of plastics in plastics, and the resulting stress will lead to cracks in plastic parts

First of all, in the selection of materials, try to choose metals with thermal expansion coefficients close to resin, such as zinc, aluminum, copper and other non-ferrous metals.

Secondly, the inserts should be placed in plastic parts made of high molecular weight resin as much as possible, which has strong crack resistance.

In addition, the thickness of the plastic around the insert should be thickened, and the minimum wall thickness will vary depending on the type of plastic.

3. Raw materials. 1. The release agent and the melt are difficult to miscothesize, and if the dosage is too much, it is easy to produce cracks, so the release agent should be used as little or no as possible.

2. If there is too much recycled material, do not add too much nozzle.

3. Do not use low-viscosity raw materials, low molecular weight.

4. The water content in the resin should not be too much, and the resin should be dried.

5. Multi-use crystalline resin.

6. If the raw materials are more pressed, the parts and components that adhere to the raw materials in the injection molding machine must be thoroughly cleaned, so as to avoid cracks in the plastic parts after the raw materials with different properties are mixed.

Go to the hardware store to buy a plastic stick, come back and burn it with a lighter for more than 10 seconds, the plastic stick will become soft, apply the heated glue stick to the plastic to be bonded, immediately dock the broken plastic products, press for 10 seconds, the whole process should be fast, and the plastic glue stick is specially used to bond plastic products.

Hello dear! The most effective way to paste plastic toys: 1. Prepare ceramic or glass pieces; 2. Prepare "good brothers" glue (good glue for brothers is a blue and red glue); 3. Blue and red glue, each extruded on the glass or ceramic sheet; 4. Use a wooden stick to stir gently; 5. Apply to the place where the toy is broken, and wait for 24 hours to dry thoroughly after docking.

Three methods for repairing plastic products.

1) If the hard plastic parts and products (such as pesticide sprayers, plastic tubes, plastic shells of equipment, etc.) are broken, the break can be aligned as it is, find a piece of plastic hard sheet of the same variety and suitable size, melt it with a hot iron rod or soldering iron, and drip it in the crack until the crack is filled, and then use a hot soldering iron to flatten it, and it will stick to it after cooling.

2) After thick soft plastic film products such as plastic handbags and wallets are broken or degummed or cracked, you can use a hot iron rod to scald the place that needs to be repaired until it is sticky, quickly dock it, and then press it hard to make up it.

3) When thin and soft plastic products such as agricultural film and raincoat are torn or have cracks, first align and align the cracks, spread a piece of cellophane on them, and then press them a few times with a hot iron rod or soldering iron to stick them well. If the plastic sheet is broken, you can take a piece of plastic sheeting slightly larger than the hole and cover it and use the same method to repair it.

PVC glue, PP glue, PE glue, PU glue, ABS glue, TPR glue, 502 glue, AB glue for plastic products cracking.

AB adhesives can bond plastic to plastic, plastic to metal, and metal to metal. After bonding, peeling requires cutting tools or hot melt separation. The bonding effect of plastic to plastic is good, almost equivalent to the strength of ABS. It is widely used for manual improvement.

The classification of plastic glue includes PVC glue, PP glue, PE glue, PU glue, ABS glue, TPR glue, 502 glue, and plastic instant adhesive.

Plastic glue is mainly used in PP (polypropylene), PE (polyethylene), nylon, PVC, PS, EVA, EPE, PC, ABS and other plastics. Bamboo, wood, metal, ceramic, stoneware, rubber, pearl cotton, sponge and other materials have good adhesion properties. When PP is bonded to PE, no surface treatment is required.

It has high transparency, high beam dry strength, convenient and economical.

1 Repair with glue Most people think it's a hassle to fix broken plastic and would rather throw it away. But fixing plastic may be a lot simpler than you think. Repair small pieces of plastic with glue as shown below:

First, buy a tube of high-strength plastic glue. If you want to repair the notched edges or connections of larger items, you may only need a strong adhesive. Shop for a variety of plastic glues, super glues, and similar handmade adhesives at your neighborhood hardware store or home improvement store.

Be sure to purchase enough glue to avoid running out of glue before the repair work is complete. 2. Apply glue to the edges and glue to the edges. To ensure a firm fit, lightly apply adhesive to the contact surface that is attached to larger objects.

Hold the glue with your dominant hand and squeeze gently. Squeeze out a little glue each time. This will prevent you from carelessly using too much to glue the work area together or mess it up.

When using plastic glue, wear rubber gloves to prevent the glue from coming into contact**. Press the plastic parts into the correct position. Carefully align the edges.

The plastic glue dries quickly, so you only get one chance. After attaching the plastic part, continue to press for 30 seconds to 1 minute. This prevents the glue from slipping off as it solidifies.

It may be helpful to stick the damaged part to a larger object underneath, or to hold it in place with a heavy object. The C-Clip makes it easy to clamp shaped objects together. 3. Let the glue solidify and let the glue solidify.

Different types of glue have different drying times. However, in general, you should wait at least 1 to 2 hours before moving the newly repaired object. Otherwise, the pieces may come loose and you will have to start from scratch.

Some glues take up to 24 hours to fully cure. Follow the curing instructions described on the product packaging to see if the manufacturer has any additional recommendations for glue drying.

Magical experiment: when plastic products are broken, this repair method works really well!

1. Hot melt glue gun.

2. The hot melt glue gun is a decoration tool, which can repair plastic fractures, has accurate breaking effect, a variety of nozzles, can meet different requirements, and has a unique filter design, which is conducive to cleaning and other characteristics. The general hot melt glue gun will not deform when used at a high temperature of 300 degrees Celsius for a long time, and the joint is durable.