Rubber and plastic low-temperature brittleness tester

1、 Characteristics and Applications:

Rubber and plastic low-temperature brittleness testerIt is the highest temperature at which the vulcanized rubber sample fails under specified conditions due to impact, which is the brittle temperature. It can be used for comparative identification of the performance of non hard plastics and other elastic materials under low temperature conditions. The low-temperature brittleness tester adopts a new type of semiconductor refrigeration (thermoelectric refrigeration), and its refrigeration temperature can be displayed digitally with high temperature control accuracy. It can determine the brittleness temperature and low-temperature performance of vulcanized rubber with different rubber materials or formulations. Therefore, quality inspection of scientific research materials and their products, control of production processes, and other aspects are indispensable. This machine complies with the requirements of GB/T 1682, GB/T15256, and GB/T5470. It can determine the brittleness temperature and low-temperature performance of vulcanized rubber and plastics with different rubber materials or formulations. Therefore, regardless of scientific research, quality inspection of rubber, plastic and their products, all technical indicators meet the requirements of national standards.

2、 Technical parameters:

1. Test temperature: -70 ℃~0 ℃

2. Distance from the center of the impactor to the lower end of the gripper:

Rubber: 8 ± 0.3mm or 11 ± 0.5mm

Plastic: 3.6 ± 0.1mm

3. Temperature fluctuation during the test time:<± 0.5 ℃

4. Cold well volume: 700ml

5. Impact velocity: 2 ± 0.2m/s

6. Dimensions: 720mm × 700mm × 1250mm

7. Power: 1100W

3、 Equipment features:

1. The refrigeration unit adopts the original French "Taikang" fully enclosed compressor.

2. The refrigeration system adopts a unit or binary low-temperature circuit system design.

3. Adopting a multi wing air supply fan for strong air circulation, avoiding any dead corners, can make the temperature distribution in the testing area uniform.

4. The design of wind path circulation for air outlet and return ensures that the wind pressure and speed meet the testing standards, and can quickly stabilize the temperature at the moment of opening the door.

5. The vertical low-temperature test chamber has a beautiful appearance and is easy to operate.

6. The temperature control adopts a fully imported touch button instrument, with simple operation and setting.

7. After inputting the data and experimental conditions, the controller has a locking function to prevent human touch from changing the temperature value.

8. Equipped with P.I.D automatic calculation function, it can immediately correct temperature change conditions, making temperature control more accurate and stable.

4、 Detailed configuration and software functions:

（1） Structure and Materials:

1. Inner box material: mirror stainless steel plate (SUS 304 thickness 1.0mm);

2. Outer box material: Stainless steel plate with yarn surface (thickness 1.0mm);

3. Insulation layer design: effectively prevents condensation at the top of the box;

4. Insulation layer: Insulation layer (made of hard polyurethane foam, 100mm thick);

5. Box door: Single panel door, single window, left opening. Flat embedded handle, rear button: SUS # 304. Double insulated and airtight tight, effectively isolating heat exchange inside and outside the box;

6. Observation window: Three layer vacuum glass for easy observation of the test sample, size: 320X250X40mm;

7. Window sweat prevention: electric heating device to prevent water vapor condensation;

8. Lighting design: High brightness window lighting energy-saving lamp, easy to observe the test sample;

9. Test hole: 50mm diameter on the left side of the body, with 1 stainless steel hole cover and 1 silicone plug (multiple or 100mm optional);

10 machine pulleys: easy to move (adjust placement position) and used in conjunction with strong bolts (fixed position);

11. In box storage rack: 2 pieces of stainless steel SUS # 304 square punched steel plate storage rack and 2 sets of tracks (adjust spacing);

12. Machine weight: approximately 200KG

（2） Freezing system:

1. Refrigeration system: Original French Taikang compressor (power determined according to low temperature range);

1.1 Overview: The heart of a compressor refrigeration system adopts a refrigeration cycle of compression, condensation, expansion, and evaporation (heat absorption) to reduce ambient temperature.

1.2 Structure: A. Shell B. Motor C. Cylinder D. Piston E. Starter and thermal protector F. Cooling system composition

1.3 Characteristics:

A. A large volume F-class insulated motor with high efficiency and low slip ensures high cooling capacity, low power consumption, and safe operation.

B. Series 1/12-12 horsepower, with hundreds of models available. The most renowned in the commercial refrigeration industry.

C. Long term applicability under different climatic conditions in different regions of China and Southeast Asia, tested and proven, with stable and reliable performance.

D. The optimal balance design ensures minimal vibration, low noise, and smoother operation of the compressor.

E. The voltage design is wide, with a single camera operating voltage of 180-240V and a triple camera operating voltage of 340-440V, suitable for China's voltage requirements.

2. Cold and hot exchange system: Ultra high efficiency SWEP refrigerant cold and hot exchange design (environmentally friendly refrigerant R404A);

3. Air cooled condenser: fin type with heat dissipation motor;

3.1 Overview: Air cooled condenser is a cooling device that uses air to cool and is used in conjunction with Freon refrigeration equipment.

3.2 Characteristics:

A. The shell is made of high-quality steel plate, with surface spray coating, corrosion resistance, beautiful appearance, high strength, corrosion resistance, and easy assembly and combination.

B. Adopting a high-efficiency external rotor fan with low speed and high air volume. Smooth operation and low noise.

C. Independent switch, safe and convenient. The fan motor has high waterproof performance (IP65) and long service life.

D. The copper tube is made of high-purity seamless copper tube, which has a long service life and is not easy to crack or corrode.

E. Large contact surface enhances the strength of fins and air turbulence effect.

F. Suitable for refrigerants such as R22, R134A, R404A, R407C, etc

4. Finned evaporator: Finned multi-stage automatic load capacity adjustment;

4.1 Overview: The evaporator is an important component among the four major refrigeration parts. Low temperature condensed gas passes through the evaporator and exchanges heat with the outside air, liquefies and absorbs heat, achieving the effect of refrigeration.

4.2 Structure:

The low-temperature brittleness tester mainly consists of a heating chamber and an evaporation chamber. The heating chamber provides the heat required for evaporation to the liquid, promoting boiling and vaporization of the liquid; The evaporation chamber separates the gas and liquid phases, and the vapor generated in the heating chamber carries a large amount of liquid foam. After entering the larger space of the evaporation chamber, these liquids can be separated from the vapor through self aggregation or the action of a demister. Usually, the demister is located at the top of the evaporation chamber.

4.3 Characteristics of Operation: In engineering, the evaporation process only separates a portion of the solvent from the solution, while the solute remains in the solution. Therefore, evaporation operation is a process of separating volatile solvents from non-volatile solutes in the solution. Due to the fact that the vaporization rate of solvents depends on the heat transfer rate, evaporation operation belongs to the category of heat transfer

During the thermal process, the evaporation equipment is a heat transfer device. However, compared with the general heat transfer process, the evaporation operation has the following characteristics:

A. The boiling point of the solution increases: Due to the presence of non-volatile solutes in the solution, the vapor pressure of the solution is lower than that of pure solvents at the same temperature. In other words, at the same pressure, the boiling point of the solution is higher than that of pure solvents. The higher the concentration of the solution, the more significant this effect becomes.

B. Material and process characteristics: During the concentration process, solutes or impurities often deposit and crystallize on the heating surface, forming a scale layer that affects heat transfer; Some solutes are thermosensitive and are prone to spoilage if left at high temperatures for too long; Some materials have high corrosiveness or viscosity, etc.

C. Energy recovery: The evaporation process is a solvent vaporization process, and due to the high latent heat of solvent vaporization, the evaporation process is a high energy consuming unit operation. Therefore, energy conservation is an important issue that should be considered in evaporation operations.

6. Other attachments: Danish dry filter, Japanese Eginomiya solenoid valve

7. System features: Automatically switch the flow rate of the refrigeration system according to different working conditions, cut off excess systems in the constant section to maintain energy-saving operation, and control the multi-stage evaporator combination for cooling, which can achieve more uniform and efficient cooling exchange efficiency and refrigeration output; The flow control is automatically adjusted by the corresponding solenoid valves;

5、 Safety protection device for rubber low-temperature brittleness tester:

1. Leakage and overload protector, compressor overload protector

2. Over temperature and over humidity power-off protection

3. Water shortage and phase loss protection

4. Compressor high and low pressure protection

5. Temperature limit protection device, compressor current protection

6、 Basic configuration:

1. Temperature control instrument: adopts LED digital display instrument, with PID control function, temperature display, alarm, data calibration and other functions;

2. Thermal insulation chamber: The chamber is made of imported insulation materials, including insulation cotton (from Japan's Henghe Co., Ltd.) and insulation walls made of heat-resistant aluminum sheets (from South Korea's Daewoo Aluminum Industry);

3. Machine shell: Ma'anshan special steel products (Chinese Mainland)

4. Temperature sensor: Taiwan, China high-speed railway

5. Material of impactor: Daewoo Property, South Korea

6. Impact spring: Ma'anshan special steel products (Chinese Mainland)

7. Power switch and socket: Taiwan, China Fuhong Group (Shenzhen, Chinese Mainland)

8. Handle: Taiwan, China Fuhong Group (Shenzhen, Chinese Mainland)

9. Fixture: Kerui

10. Chamber lighting bulb: Hengguang bulb company

11. Vulnerable parts: temperature sensor, handle, light bulb