In the shoemaking process, the shoe vacuum wrinkle removal and heat setting machine plays a vital role. It can effectively eliminate wrinkles on the upper, make the shoes fit the shoe last better, and improve the overall quality. However, there are many such machines on the market. How can we choose to achieve the real wrinkle removal effect?

1. To know the working principle is the basis

 The shoe vacuum wrinkle removal heat setting machine mainly removes wrinkles through steam softening, vacuum adsorption and heating setting. Steam can quickly soften the upper leather or fabric, making the wrinkles easier to unfold. For example, the steam spray device used in some equipment can produce strong and sufficient steam, which can quickly penetrate into the upper material. After softening, the air inside and around the shoe is extracted by the vacuum system to form a negative pressure environment. Under the action of the external atmospheric pressure, the upper fits tightly to the shoe last, and the wrinkles are gradually flattened. Finally, the shoe is properly heated by the heating device, so that the upper material is fixed in the state of fitting the shoe last, so as to maintain a flat appearance. For example, some heat setting machines use a combination of heating tubes and heat sinks to evenly heat the shoes to ensure a stable setting effect.

The shoe vacuum wrinkle removal heat setting machine mainly removes wrinkles through steam softening, vacuum adsorption and heating setting. Steam can quickly soften the upper leather or fabric, making the wrinkles easier to unfold. For example, the steam spray device used in some equipment can produce strong and sufficient steam, which can quickly penetrate into the upper material. After softening, the air inside and around the shoe is extracted by the vacuum system to form a negative pressure environment. Under the action of the external atmospheric pressure, the upper fits tightly to the shoe last, and the wrinkles are gradually flattened. Finally, the shoe is properly heated by the heating device, so that the upper material is fixed in the state of fitting the shoe last, so as to maintain a flat appearance. For example, some heat setting machines use a combination of heating tubes and heat sinks to evenly heat the shoes to ensure a stable setting effect.

2. Main technical parameters to pay attention to

(1) Vacuum degree: A higher vacuum degree can make the upper of the shoe be subjected to stronger external pressure, and more effectively flatten wrinkles. Generally speaking, a vacuum degree of -0.08MPa to -0.1MPa is ideal. For example, some advanced vacuum wrinkle removal heat setting machines have a vacuum system that can stably maintain a high vacuum degree, allowing the upper to fit tightly with the shoe last, greatly improving the wrinkle removal effect.

(2) Steam volume and temperature: Sufficient steam volume can ensure that the upper is softened quickly and fully. The steam temperature should usually be between 100℃ and 150℃. If the steam volume or temperature is not enough, the upper cannot be completely softened and wrinkles are difficult to remove. When the steam volume and temperature are appropriate, the upper of materials such as leather can become soft and plastic in a short time, which is convenient for subsequent vacuum wrinkle removal operations.

(3) Heating power and uniformity: Heating power determines the efficiency and effect of shaping. If the power is too small, the heating speed will be slow, the production efficiency will be low, and the shaping may not be sufficient; if the power is too large, it may damage the upper material. At the same time, the uniformity of heating is also extremely critical. Uneven heating will cause some areas of the shoe to be overheated and deformed, and some areas will not be sufficiently shaped. High-quality heat setting machines usually adopt special heating structure design, such as setting multiple heating tubes in the heating chamber and equipped with a temperature control system to ensure uniform heating and precise temperature control.

3. Functional features cannot be ignored

(1) Circulation wrinkle removal system: Machines with dual-circulation or multi-circulation wrinkle removal systems often have better wrinkle removal effects. This system can steam and vacuum the shoes from multiple angles to completely eliminate wrinkles in all parts of the upper. For example, some equipment has a dual-circulation system, one cycle focuses on the softening and preliminary wrinkle removal of the upper as a whole, and the other cycle performs intensive treatment on the details, so that the quality of the shoes is comprehensively improved.
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(2) Temperature and humidity adjustment function: Different upper materials, such as leather, fabric, and artificial leather, have different requirements for temperature and humidity. Heat setting machines with precise temperature and humidity adjustment functions can be set accordingly according to the characteristics of the upper materials. For example, when processing leather uppers, appropriately increasing the temperature and humidity can better soften the leather; while when processing fabric uppers, the temperature needs to be lowered to avoid damaging the fabric fibers. ​

(3) Automation degree: Heat setting machines with a high degree of automation can not only improve production efficiency, but also ensure the consistency of wrinkle removal effects. For example, equipment with automatic loading and unloading functions, and can automatically complete a series of operations such as steam softening, vacuum wrinkle removal, and heating setting according to preset programs. The operator only needs to place the shoes in the designated position, and the machine will automatically complete the subsequent processes, reducing the impact of human factors on the wrinkle removal effect.

4. Equipment material and structural design affect the effect

(1) Material: The material of the inner tank, steam pipe and other parts of the heat setting machine is crucial. The inner tank should be made of high-temperature and corrosion-resistant stainless steel, so that it will not rust or deform in a long-term high-temperature and high-humidity working environment, ensure the stability of steam and heating, and then ensure the stability of the wrinkle removal effect. If the steam pipe is made of high-quality metal material, it can effectively prevent steam leakage, ensure the stability of steam pressure and flow, and provide stable steam softening conditions for the upper.

(2) ​Structural design: Reasonable structural design helps to improve the working efficiency and wrinkle removal effect of the heat setting machine. For example, the spatial layout inside the equipment should be reasonable to facilitate the placement of shoes and the uniform circulation of steam and hot air. Some heat setting machines with overhead circulation processing design can make all parts of the shoes fully contact steam and hot air during the processing process, soften more thoroughly, and cooperate with vacuum wrinkle removal and deodorization devices to achieve better shaping and wrinkle removal and deodorization purposes. In addition, the sealing performance of the machine is also critical. Good sealing can ensure the stability of the vacuum environment, as well as the non-leakage of steam and heat, improve energy utilization and wrinkle removal effect.

5. Brand and after-sales service guarantee the use effect

(1) Brand reputation: Choosing a well-known brand of shoe vacuum wrinkle removal heat setting machine often guarantees product quality and performance. Well-known brands usually have advanced production technology, strict quality control system and rich industry experience. For example, some brands that have been deeply involved in the field of shoemaking machinery for many years have been verified by the market for a long time. The heat setting machines they produce have excellent wrinkle removal effect, stability and durability. ​

(2) After-sales service: Perfect after-sales service can ensure timely repair when the equipment fails and reduce downtime. After-sales service includes timely technical support, sufficient supply of accessories and regular equipment maintenance. For example, some brands provide 24-hour online customer service, which can answer users' questions during use at any time; and when the equipment fails, they can quickly arrange professional maintenance personnel to repair it on site to ensure the normal operation of the equipment, so as to continuously achieve good wrinkle removal effect.