Rotomolded products become soft usually due to improper material selection, poor process control or mismatched use environment**. The following is a detailed analysis of the reasons and solutions:

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I. The main reasons for the softening of rotomolded products

II. Emergency remedial measures (softening of produced products)

III. Preventive measures (long-term solution)

Summary
The main reasons for the softening of rotomolded products are improper material selection, poor process control or mismatch of use environment. The best solution is:
1. Use high-rigidity resin (HDPE/PP) and add fillers;
2. Optimize heating and cooling processes;
3. Add reinforcement or adjust wall thickness;
4. Adapt to the use environment (temperature resistance/chemical corrosion resistance).

Through system optimization, the hardness of the product can be significantly improved and deformation problems can be avoided.

## Possible reasons

1. **Material property mismatch**:
- The melting characteristics of PVC do not meet the requirements of rotational molding process
- The melt flow index (MFI) may not be suitable for rotational molding process
- Insufficient thermal stability, decomposition during rotational molding heating process

2. **Process parameter problem**:
- Improper heating temperature (too high leads to decomposition, too low cannot be fully melted)
- Rotation speed mismatch
- Inappropriate cooling rate

3. **Formula problem**:
- Improper selection or dosage of plasticizer
- Insufficient stabilizer or mismatched type
- Lubricant system is not suitable for rotational molding

## Solution suggestion

1. **Material selection**:

2. **Process optimization**:

3. **Formula Adjustment**:

4. **Equipment Check**:

## Test Recommendations

1. Conduct small-scale trials to determine the optimal process window
2. Use differential scanning calorimetry (DSC) to analyze the melting characteristics of PVC
3. Perform rheological tests to evaluate melt behavior

More specific process parameters and material specifications are required to provide more targeted recommendations.

1. Analysis of corrosion causes

2. Emergency treatment measures

3. Long-term protection plan

4. Maintenance and monitoring

5. Economic considerations

1. Advantages of Teflon coating

2. Application method

3. Precautions

4. Alternative or supplementary solutions

5. Maintenance suggestions

1. Production process optimization and quality control

2. Predictive maintenance and equipment management

3. Supply chain and intelligent inventory management

4. Product design and material innovation

5. Energy efficiency and sustainable development

6. Market response and customized production

7. Human resources and training

1. Enhance structural strength

2. Optimize material use

3. Improve product stability

4. Functional expansion

5. Extended service life

6. Design flexibility

1. Why are there vents on the surface of rotomolded products?

（1）Rigid process requirements - exhaust is the "lifeline" of rotational molding

（2）The location of the exhaust hole cannot be completely hidden

（3） Air pressure balance during the cooling stage



2.How to reduce the impact of exhaust holes on the surface?
（1）Design optimization

（2） Process improvement

（3）Post-processing

Here are some steps and precautions for how to evenly wear the surface of the roto-molded finished product:

1. Choose the right abrasive

2. Determine the purpose of wear

3. Control the intensity and speed of wear

4. Uniform wear

5. Pay attention to safety

1. High design freedom and flexible modeling

2. Lightweight, easy to install and transport

3. Strong durability and wide application environment

4. Low cost, suitable for small batch customization

5. Diverse surface treatments and rich textures

6. Environmental advantages

7. Functional expansion



Typical application scenarios
Home decoration: art ornaments, imitation stone flower pots, creative lampshades.

Commercial space: shopping mall art installations, corporate LOGO sculptures, theme restaurant decorations.

Outdoor landscape: park sculptures, imitation wood railings, holiday decorations (such as Christmas trees, pumpkin lanterns).

Summary
The core advantage of roto-molded decorations lies in "low cost to achieve complex design" + "lightweight and durable", which is particularly suitable for scenes that require personalization, small and medium batches, and outdoor use. It is a high-quality alternative to traditional metal and ceramic decorations.

1. Potential problems of rotomolding mold modification

2. Is it recommended to change the mold? Decision-making by scenario

3. Alternative solutions for remodeling

4. Key steps before remodeling

1. Clarify production needs

Before choosing rotomolding equipment, enterprises need to clarify their own production needs. This includes determining the type, specification, quantity and production process requirements of the plastic products to be produced. Understanding this basic information will help enterprises determine the specifications and performance requirements of the required equipment.

2. Consider equipment performance parameters

Specifications and capacity: According to production needs, select suitable equipment specifications and capacity to ensure that the requirements of production efficiency and output can be met.

Precision and stability: The precision and stability of the equipment have an important impact on product quality. Choosing equipment with high precision and high repeatability can improve the qualified rate and stability of the product.

3. Understand market reputation and after-sales service

Market reputation: Understanding the reputation and user evaluation of rotomolding equipment in the market will help to judge the performance and quality of the equipment. Choosing brands and manufacturers with good reputation can reduce the risk of purchase.

4. Consider budget and return on investment

Budget range: Set a reasonable budget range and select and configure the equipment according to the budget. At the same time, consider long-term operating costs, such as maintenance costs and consumables costs.

5. Actual inspection and comparison

Field inspection: Enterprises with conditions can inspect the equipment manufacturers on site to understand the actual operating conditions, production efficiency and process flow of the equipment. This will help enterprises to evaluate the performance and quality of the equipment more comprehensively.

1. Not considering wall thickness distribution

2. Overly complex mold features

3. Insufficient draft angles

4. Ignoring shrinkage tolerances

5. Ignoring proper venting of the mold

6. Designing with inconsistent surface textures

7. Underestimating the cooling stage in the design

8. Improper placement of reinforcements

9. Insufficient consideration of post-molding processes