Does the plastic wall thickness affect the quality?

ਦ ਪਲਾਸਟਿਕ ਕੰਧ ਮੋਟਾਈ processing has a great influence on quality. If the ਕੰਧ ਮੋਟਾਈ is too small, the flow resistance is large, and it is difficult for large and complex plastic parts to fill the cavity. The minimum size of the processed wall thickness of plastic parts should meet the following requirements:

1. Have sufficient strength and rigidity;
2. It can withstand the impact and vibration of the demolding mechanism during demolding;
3. It can withstand the tightening force during assembly.

ਦ injection molding processing plant stipulates a minimum wall thickness value, which varies according to the variety, brand and product size of plastic parts. Excessive wall thickness in the processing of plastic parts not only wastes raw materials, but also increases molding pressure for thermosetting plastic molding processing.

It is easy to cause incomplete curing; for thermoplastics, the cooling time is increased. ਇਸਦੇ ਇਲਾਵਾ, it will also affect the quality of plastic parts processing. The wall thickness of the same injection molded part should be as uniform as possible, otherwise it will be caused by cooling and Uneven curing speed generates additional stress.

It is very important to determine the wall thickness of plastic parts reasonably. The wall thickness of a plastic part is first determined by the use requirements of the plastic part: including the strength of the part, quality cost, electrical performance, dimensional stability, and assembly requirements. ਆਮ ਤੌਰ 'ਤੇ, the wall thickness has an empirical value, which can be determined by referring to similar (such as Irons generally have a wall thickness of 2mm, and vacuum cleaners generally have a wall thickness of 2.5mm). The points to note are as follows:

1. The wall thickness of the plastic parts should be as uniform as possible, avoid too thin, too thick and sudden wall thickness changes. If the wall thickness changes are required for the plastic parts, a gradual change or arc transition should be adopted, otherwise the plastic parts will be deformed due to uneven shrinkage. , Affect the strength of plastic parts, affect the fluidity during injection molding and other molding process issues.

1. The wall thickness of plastic parts is generally in the range of 1-5mm. The most commonly used value is 2-3mm.

1. The minimum wall thickness of commonly used plastic parts and the recommended value of commonly used wall thickness: (ਮਿਲੀਮੀਟਰ)

1. Try not to design the stiffeners and screw columns too thick. ਆਮ ਤੌਰ 'ਤੇ, it is recommended to take half the body wall thickness for safety, otherwise it is easy to cause appearance problems such as miniatures.

1. Try not to design the parts as separate flat plates. The size is small, otherwise the parts will be uneven due to deformation.

Wall thickness of injection molded products

On the one hand, injection molded products must have a certain thickness in use to have sufficient strength to meet the needs of physical and mechanical properties;

ਦੂਜੇ ਹਥ੍ਥ ਤੇ, factors such as the lightest quality, less materials, and low cost should be considered, and the thickness should be thinner.

ਇਸ ਲਈ, it is very important to choose the wall thickness of injection molded products reasonably. ਆਮ ਤੌਰ 'ਤੇ, the following three points should be paid attention to when designing the wall thickness of the product.

(1) The wall thickness of injection molded products should not be too thin

On the one hand, plastics have a certain degree of fluidity after melting during the molding process. Due to their different varieties and grades, their fluidity is also different.

Under the conventional process parameters of various plastics, the process size is directly proportional to the wall thickness of the polyoxymethylene plastic.

If the wall of the injection molded product is designed to be very thin, during injection molding, the thin wall will make the flow resistance of the molten plastic in the mold cavity large. The process becomes shorter, the molding is difficult, and the waste increases. It is impossible to fill the cavity for large and complex products. .

ਦੂਜੇ ਹਥ੍ਥ ਤੇ, the minimum thickness of the product wall should also meet the requirements of maintaining the normal structure during use, and meet the strength and rigidity. It can withstand the impact and vibration of the demolding mechanism during demolding, and can withstand the tightening force during assembly.

If the wall of the injection molded product is designed to be very thin, it will not meet the above-mentioned strength requirements.

The common wall thickness of different materials of plastic parts:

ਏ.ਬੀ.ਐੱਸ: Generally the first choice of material, the wall thickness is usually 1, 1.2, 1.5, 2, 2.5, 3ਮਿਲੀਮੀਟਰ, depending on the size and function of the product.

ਪੀ.ਪੀ: Because it is soft and due to shrinkage, it should not be too thick, generally 1, 1.2, 1.5ਮਿਲੀਮੀਟਰ.

PVC: Because it is mostly used because the figure is solid, there is not much restriction.

POM: ਆਮ ਤੌਰ 'ਤੇ 1, 1.2, 1.5, 2, 2.5, 3mm depends on the size of the product.

Nylon: Because the shrinkage rate is relatively high, the ratio of the average material thickness to the bones can be relatively small.

Kraton: Because most of them are used as motor pads or non-exposed parts, so there is not much restriction. ਨੂੰ

The thickness of the wall depends on the external force that the product needs to bear, whether it is used as a support for other parts, the number of supporting columns, the number of extensions, and the plastic material selected. The wall thickness design of general thermoplastics should be limited to 4mm.

From an economic point of view, an overly thick product design not only increases material costs, prolongs the production cycle (cooling time), and increases production costs. From the perspective of product design, a thick product increases the possibility of creating voids (ਕਈ ਕਿਸਮਾਂ ਦੇ ਕਾਰਨ), which greatly weakens the rigidity and strength of the product.

1) The wall thickness of the plastic part is too large: the overall wall thickness of the plastic part should be uniform, avoid being too thin or too thick. If it is not uniform, it will cause uneven molding filling and cooling shrinkage, causing the plastic part to have miniatures, bubbles, deformation, ਆਦਿ. risk.

2) The wall thickness of the plastic part is too thick or too thin: Under the condition of meeting the requirements of the structure and use of the plastic part, use a smaller wall thickness as much as possible, so that the plastic mold can cool quickly, the quality of the plastic part is small, and the material is saved, and the cost is reduced. . The wall thickness of the designed plastic part must be able to withstand the impact and vibration of the ejector device, but not too thin.

3) The thickness of the inner wall of the plastic part should be less than the thickness of the outer wall, otherwise the plastic part is prone to miniatures and dents.

4) The wall thickness of different plastic parts has no gradual transition. When the wall thickness of the plastic parts is different, the parts with different wall thicknesses connected to each other should have enough transition connections to avoid sudden changes in size.

5) The structure is designed to have the thickness concentration part: from the shape point of view, the thickness concentration part is the part where the wall thickness changes sharply. For such places, it is necessary to avoid concentrated formation of thick-walled parts as much as possible.

6) The design of the wall thickness of the plastic parts is unreasonable: different plastics have different fluidity.And the wall thickness of the plastic parts is also different. Plastic parts cannot be designed to be too thin, otherwise they will have poor rigidity and pressure resistance, which will cause damage and deformation during demolding, ਅਸੈਂਬਲੀ, and use, which will affect the use of products and the accuracy of assembly. The design of plastic parts is too thin, which will also cause difficulty in molding.

7) Wall-thick plastic parts should use inserts or composite parts to prevent their deformation and shrinkage.

8) Changing the wall thickness of the plastic part will change the molding time and pressure. ਇਸ ਲਈ, the influence of the wall thickness of the plastic part on the molding pressure and time should be considered in the design.

ਜੇ ਤੁਸੀਂ ਜਾਣਨਾ ਚਾਹੁੰਦੇ ਹੋ ਕਿ ਕਿਹੜਾ ਮਸ਼ੀਨ ਤੁਹਾਡਾ ਉਤਪਾਦ ਲਈ ਢੁਕਵਾਂ ਹੈ, ਅਤੇ ਇੰਜੈਕਸ਼ਨ ਮੋਲਡਿੰਗ ਮਸ਼ੀਨ ਦੀ ਕੀਮਤ ਜਾਣੋ, ਤੁਸੀਂ ਔਨਲਾਈਨ ਗਾਹਕ ਸੇਵਾ 'ਤੇ ਕਲਿੱਕ ਕਰ ਸਕਦੇ ਹੋ ਜਾਂ ਸਲਾਹ ਲਈ ਕਾਲ ਕਰ ਸਕਦੇ ਹੋ! FLYSE ਸੇਵਾ ਹਾਟਲਾਈਨ: 8618958305290