Some electrotechnical products are needed to be tested if they can resist high and low temperature alternating at certain humidity before they are sold. It is one kind of environmental test. Then a High and Low Temperature Alternating Damp Heat Test Equipment, which is a kind of climate chamber or environmental chamber, is needed.

The cooling, low temperatures, constant temperatures and humid temperature of the products give you the necessary cooling capability. Based on the distinct test claims of the products, the refrigeration method will automatically learn to supply cooling capability for the related test method, to be able to match the functionality crawl of the products.

If we want to test a condenser of auto AC, a helium gas detection system or an air tightness test equipment is needed to do the test. But how does it works? Here are the methods of testing car condenser:

 

1.Large leak detection: After the vacuum holding chamber front door is shut down, the machine successively functions tough and great pumping of the vacuum holding chamber before the vacuum level inside the holding chamber reaches the set leak detection stress. Once the vacuum holding chamber is evacuated, the machine fills the test part inside the holding chamber rich in-stress gas of three.5MPa (downward changeable), after which keeps the strain, waiting around for the strain sensing unit of the system to ensure whether there is a huge leak. If there is a huge leak inside the check part, the machine will discharge our prime-stress gas inside the check part, close the suction control device of the vacuum holding chamber at the same time, and terminate the leak detection method. And right after filling the vacuum holding chamber into the environment, the proprietor presses the verification option, the entrance of the vacuum holding chamber will automatically available, utilizing the check part out, marking and putting it into the to-be-handled place. When the system fails to find a huge loss of the check part, it would automatically carry out the subsequent leak detection method.

 

2.Vacuum the test part: If no huge loss of the check part is available, the machine will release our prime-stress gas inside the check part and vacuumize the inside of the check part. Once the vacuum level inside the check part reaches the set stress worth, wait for the evacuation technique of the vacuum holding chamber to accomplish.

 

3.Vacuum helium detection: Once the evacuation of the vacuum holding chamber reaches the set leak detection stress, and at the same time the evacuation of the check part inside the holding chamber continues to be finished, the machine detects the helium sign inside the detection container and suppresses this sign to absolutely nothing. Then load the test part with 4.0Mpa (downward changeable) helium gas. Once the helium gas stress inside the check part reaches the set worth, the leak detector will detect the loss of the check part.

 

When the leak detector locates a helium sign that surpasses the set worth, this means that there is a tiny leak inside the check part inside the holding chamber and also the system will problem a leak alarm system. The proprietor presses the verification option, and also the vacuum holding chamber will automatically be opened up right after simply being loaded with the climate. After the proprietor divides the fast connector from the check part, the test part may be taken off and designated consequently.

 

When the leak detector fails to find a helium sign that surpasses the set worth, this means the detected check part has no loss. The program sends a signal that goes by the detection, and automatically functions the helium rehabilitation method in the check part.

 

4.Helium rehabilitation: After the assessment is completed, the helium inside the check part is sent back to the very low-stress helium aquarium through automated stress harmony. Once the helium stress inside the check part falls to atmospheric stress, the machine works with a vacuum pump to recuperate the remainder helium inside the check part. Once the stress inside the check part falls to the set worth, the helium recovery process is completed. Whilst recouping helium, the machine fills the vacuum aquarium with environment. Once the stress of the vacuum container rises to atmospheric stress and also the helium recovery process of the check part inside the holding chamber continues to be finished, the entrance of the vacuum holding chamber is automatically opened up and also the detection method is completed.

 

These days electrical vehicles are becoming popular among people. The most important part of the electrical car is its battery. Therefore the safety of the battery must be ensured. There are several tests for the battery. One of them is the tightness test. The machine to this test is called Tightness Testing of Automotive Energy Storage Batteries.

 

This equipment is a helium sensor for the steel casing battery following the shot hole is covered and welded. It mainly includes operations including battery checking, feeding, evacuation, helium stuffing, helium examination, and unloading. The helium sign in the problem recognition cavity is detected with the helium problem sensor, that may assess the leakage of the workpiece quickly and accurately rich in accuracy and precision.

Gas concentration (including gas leak detection) detection technology has a wide range of applications, among which vacuum chamber type gas leak detection technology is a common technology, which detects the gas tightness of products through the detection of trace gas concentration.

 

The vacuum chamber type gas leak detection technology generally uses halogen gas, hydrogen or helium as the tracer gas. The  includes the detection chamber, vacuum pumping valve, vacuum pump, gas sensor valve, gas sensor, tracer gas valve and tracer gas source. During detection, first open the vacuum pumping valve, use the vacuum pump to pump the detection chamber to a high vacuum, and then open the tracer gas valve and tracer gas source, Fill the tracer gas into the workpiece to be inspected, finally open the gas sensor valve, and use the gas sensor to detect the concentration of the tracer gas outside the workpiece to be inspected. If the detected tracer gas signal exceeds the set value of the gas sensor, the workpiece to be inspected on the surface has leakage.

 

The characteristic of vacuum chamber type gas detection technology is that the workpiece is placed in the detection chamber. Before the workpiece is filled with tracer gas for leak detection, the vacuum pumping valve is opened first, and the detection chamber is pumped to a high vacuum with a vacuum pump. The requirements for vacuum degree are very high, otherwise the detection accuracy is easily affected. Because of the high vacuum, the tracer gas diffusion speed is fast, and the gas sensor can quickly detect the concentration of the tracer gas by the diffusion movement of the tracer gas in the vacuum environment without auxiliary inspiration. The vacuum chamber type gas leak detection system has high detection accuracy, fast production rhythm, and can realize full automatic detection without manual intervention. However, the equipment structure is very complex and strict, and the equipment manufacturing cost is high. Because of the need for a high vacuum, the vacuum system design is complex, and the manufacturing cost is also high, the promotion and use of the vacuum chamber type leak detection technology is limited by the high cost of equipment investment. At the same time, this technology cannot locate the leak point of the workpiece to be inspected.

The electric vibration test system contains four pieces: shake analyze-your bed, potential amplifier, control and chilling fan. It can be popular in vehicle parts, aerospace, devices, navigation, communication, gadgets, electrical contractor along with other sectors to identify the architectural steadiness of analyze samples, which assists to further improve the stability of products.

 

Feature:

1. Functioning concept of shaking dinner table: the electrified conductor techniques under the action of electromagnetic power within the magnet field. If the relocating coil within the magnet circuit in the electromagnetic shaking dinner table goes by throughout the switching current indicate, the interesting power is made, as well as the shake movements is made within the magnet circuit.

2. Functioning concept of energy amplifier: the 3-period switching current is separated throughout the energy frequency transformer, depressurized and brought to the 3-period complete connection filtering, and so the reduced ripple DC power source is acquired through capacitor filtering and brought to the H-connection transformer. The result voltage influx is filtered with the regular setting and typical setting choke coil and then result for the shaking dinner table.

3. Venzo range shake control, the core item in the control, is an extremely excellent control rich in expense efficiency, which could handle a myriad of shake dining tables (electronic or hydraulic shake dining tables, and so forth.). By far the most sophisticated DSP framework and handle algorithm formula worldwide, 32-little bit drifting-stage 450MHz DSP processor, high-efficiency 24 little bit ADC and 130dB vibrant range are adopted to guarantee trustworthy handle good quality.

It is actually ideal for everywhere heat and humid heat analyze of electrical contractor, electronic devices, machinery and enormous components, semi-completed products and completed products.Examination the high quality and longevity of these products and components beneath the simulated temperature and humidity adjustments.

 

Set up Environment：

1.Temperature: 0℃ ~35℃, relative humidity: 85%, air pressure: 86kPA~106kPa

2.Cellular phone internet site shall be toned, properly ventilated with no strong vibrations across the equipment.

3.There is no strong electromagnetic area influence across the equipment, no flammable, intense, corrosive compounds and dust across the equipment.

4.Suitable use and servicing place remains to be across the equipment.

 

Salt spray testing is widely used in many manufacturing industries. For example, in automobile industry, power battery, automobile assembly and parts must resist salt spray corrosion. Therefore, factories producing those products must do the salt spray test to make sure that the product reach the qualification.

 

The salt spray test is normally done by a test machine. There are many kinds of machines can do the salt spray test. One of them is called alternating salt spray laboratory. It can simulate marine climate and assess the salt spray corrosion resistance of specimen and their protective layer. The alternating salt spray laboratory is complied with ISO12405-3:2014.

 

There will be three stages of the testing process:

A. It will spray salt spray at 15℃ to + 35℃ for 2 hours.

B. Then when the temperature reaches (40 ± 2) ℃ and relative humidity reaches (93 ± 3)%, placed the specimen for 20 to 22 h.

C. After that, when the temperature reaches (23 ± 2) ℃ and the relative humidity is 45% to 55%, placed the specimen for 3 days.

Stage A and stage B are one cycle, repeating 4 cycles and then proceed stage C to form a test cycle and completing 4 test cycles at the test.

 

FLANNEL

Material:Originally made of wool, now also available in polyester and other synthetic fibers as imitation flannel.

Appearance & Feel: Short and dense fine hairs, tightly structured, resistant to deformation, good gloss, and soft to the touch.

Properties: Excellent moisture absorption and breathability, strong insulation, and minimal shedding.

 

Applications: Commonly used in suits, trousers, bedding, etc.

 

CORAL FLEECE

Material: Made of polyester fibers.

Appearance & Feel: Long and dense hairs resembling the soft body of live coral, colorful, and soft to the touch.

Properties: Good insulation, but the longer the hairs, the poorer the moisture wicking ability; not prone to pilling but prone to shedding.

Applications: Often used in making robes, pajamas, baby products, children's clothing, footwear, hats, toys, etc.

 

POLAR FLEECE

Material: Generally made of polyester fabric, with the option to add a certain percentage of spandex (which can be difficult to control in quality).

Appearance & Feel: The front side has fluffy and dense loops, while the back side has sparse and uniform loops with short hairs, feeling soft to the touch.

Properties: Elastic, insulating, wear-resistant, non-shedding, mold-resistant, moth-proof, good elasticity, and resistant to wrinkles and deformation.

Applications: Commonly used in outerwear, children's clothing, hoodies, cold-weather outerwear, loungewear, etc.

 

POLYESTER SHERPA

Material: Synthetic fabric made of pure polyester or blend of polyester and acrylic fiber.

Appearance & Feel: Relatively long and fluffy hairs resembling lamb's wool, feeling soft to the touch.

Properties: Wear-resistant, mold-resistant, moth-proof, good elasticity, and resistant to wrinkles and deformation.

Applications: Often used in making outerwear, loungewear, hats, toys, etc.

 

MILK FLEECE

Material: A new type of animal protein fiber made from milk as the basic raw material, after dehydration, degreasing, purification, and blending, crosslinking, and grafting with polyacrylonitrile.

Appearance & Feel: Short and dense hairs, treated for softness, silky smooth like milk, good gloss, and soft to the touch.

Properties: Excellent moisture absorption and breathability, strong insulation.

Applications: Commonly used in bedding, high-end underwear, etc.

 

VELVET

Material: Silk fabric woven with silk or artificial silk loops and cotton yarn as the weft.

Appearance & Feel: Luxurious and elegant appearance, dense pile hairs, long and slightly inclined, silky smooth to the touch.

Properties: Good insulation, bright gloss.

Applications: Can be used to make autumn and winter clothing, hats, silk velvet blankets, and decorations, as well as high-end sofa covers, curtains, etc.

 

These fabric can be dyed by TY-JL636 series high temperature high pressure low tension fabric dyeing machine, according the width and GSM fabric can be adjusted the nozzle size. 

Acrylic, known as "Orlon" in the United States and "Acrilan" or "Cashmilon" in other countries, it is the commercial name for polyacrylonitrile in China. It's one of three major types of synthetic fiber, ranking third in production after polyester and nylon. Soft, lightweight, warm, corrosion-resistant, and lightfast short fiber similar to wool, with lower density than wool, earning its nickname "artificial wool."

 

PERFORMANCE OF ACRYLIC

Form

The form varies with solvent and spinning method. The longitudinal surface of acrylic fiber has a few grooves. Fibers spun by the dry method have a dumbbell-shaped cross-section, while those spun by the wet method (using NaSCN as the solvent) are round.

 

Strength, Elongation,Elasticity

Acrylic fiber is fluffy, curly, and soft with good elasticity. However, it has large residual deformation after multiple stretches, making the cuffs and collars which is knitted or woven by arcylic prone to deformation.

Compared to wool:

• more than 10% lighter but more than twice as strong.
•  resilience is approximately equal to wool when stretched slightly.
•  Wool's resilience exceeds acrylic during wear.

 

Moisture Absorption and Dyeability

Due to its tight structure, acrylic fiber has low moisture absorption, with moisture regain of about 1.2-2.0% under normal atmospheric conditions. Its dyeability is poor but improves with the introduction of second and third monomers.

 

Thermal Conductivity and Heat Resilience

Heat Resilience:Rapidly cooling fiber under tension condition, fixing it with large internal stress, fiber is latent shrinkage when exposed to heat, that is heat resilience.

High-Shrinkage Acrylic Fiber:Fibers forced to stretch thermally under external force and possess heat elasticity.

 

Acid and Alkali Resistance

Acrylic fiber is acid-resistant but relatively sensitive to alkalis.

Lightfastness

Acrylic fiber excels in lightfastness and weather resistance, ranking best among common textile fibers. After one year of outdoor exposure, its strength decreases by only 5%, and its resistance to sunlight is twice that of wool and ten times that of cotton. Therefore, acrylic fiber is ideal for outdoor fabrics.

 

Other Properties

Acrylic has good heat resistance, with ironing temperature of 130-140°C. It with mold-resistant and insect-proof, but it has poor wear resistance and dimensional stability. Acrylic with relatively low density.

 

 

ACRYLIC FABRIC

100% Acrylic Fabric

Made entirely of acrylic fiber. For example, worsted acrylic women's suit fabric made of 100% wool-type acrylic fiber has loose structure, vibrant color, soft and elastic handfeel, and texture that is neither loose nor worn out, suitable for making mid-to-low-end women's clothing. Using 100% acrylic bulk yarn as raw material, plain or twill acrylic bulk coat fabric can be produced, featuring full handfeel and the characteristics of a wool-like fabric that is warm and lightweight, suitable for making coats, casual wear, etc., for spring, autumn, and winter.

Note: if dyeing high bulky acrylic hank yarn need use cabinet hank yarn dyeing machine; if dyeing solid acrylic hank yarn can use normal temperature hank yarn spray dyeing machine

 

Acrylic Blended Fabric

Fabric blended with wool-type or medium-staple acrylic fiber and viscose or polyester. It includes acrylic/viscose gabardine, acrylic/viscose women's suit fabric and acrylic/polyester tweed. Acrylic/viscose gabardine, also known as Oriental gabardine, is a 50/50 blend of acrylic and viscose, featuring thick and tight fabric body, durability, smooth and soft surface similar to wool gabardine, but with poor elasticity and easy wrinkling, suitable for making inexpensive pants. Acrylic/viscose women's suit fabric is an 85/15 blend of acrylic and viscose, often woven in crepe weave, with slightly hairy surface, vibrant color, lightweight, good durability and poor resilience, suitable for making outerwear. Acrylic/polyester tweed is 40/60 blend of acrylic and polyester, processed in plain or twill weaves, featuring flat and stiff appearance, durability and wrinkle resistance, but poor comfort, making it suitable for making mid-range outerwear and suits.

 

 

Cotton cone yarn dyeing,  process mainly consists of the following five steps:

PRETREATMENT

This step primarily removes natural impurities (cottonseed hulls, waxy substances, etc.) and pigmentum from the yarn, enhancing its whiteness and capillary effect to create conditions for dyeing processing.

 

DYEING

Each type of fiber has its unique dyeing characteristics, and yarn dyeing process is formulated based on  properties of cotton fibers (cellulose fibers) and reactive dyes. The process of package yarn dyeing involves applying pressure to dye solution in cone yarn dyeing machine using a pump, allowing the dye solution to penetrate from inner layer to outer layer of package yarn, thereby achieving uniform dyeing.

 

SOAPING

After dyeing, a large amount of hydrolyzed and unreacted dye remains on the surface of the yarn, which must be removed by adding soaping agent and washing under high temperature conditions (known as soaping). The role of soaping is to remove the floating dye on the yarn, improve the color brightness, and meet the fastness requirements of customers.

 

COLOR FIXATION

After soaping, for dark and medium color, fixing agent is added to achieve the processing requirements of subsequent finishing. The function of fixing agent is to form a protective film on the surface of the yarn to prevent dye from falling off during subsequent finishing processes.

 

SOFTENING

During the dyeing process, natural waxy substances on the yarn surface are destroyed, making the yarn feel harder. Therefore, after dyeing, a certain compound is added to the yarn to reduce friction between yarns, facilitating winding and subsequent weaving processes.