Product Description
ASTM Mattress Roller Durability Tester
Description
Mattress Durability Testing Machine has been manufactured to determine the durability of any type of mattress and boxspring unit, regardless of the materials of construction, by simulating long-term use conditions. There are several different methods used in the mattress industry for the evaluation of innerspring and box spring mattresses. The Cornell Type Tester is used to test for firmness and firmness retention, the Mattress Rollator is used to test for durability and the Bedding Impact Tester is used to assess the effect of impact.
The Mattress Rollator consists of a weighted roller which moves width ways across a test mattress to simulate body movement. The length of stroke to which the Roller moves is very easily adjusted, by sliding the stroke adjustors left or right, to suit the relevant mattress under test. Unloading and loading of the Roller CZPT the test mattress is done easily via a motor driven lifting assembly.
Test standard: ASTM F1566, EN1957
Test purpose: Using a horizontal hexagonal wooden drum roll or cylinder (both ends of the diameter of 250 mm, the middle part of the 300 mm, rolling back and forth on the mattress, simulate human motion to assess the durability of the mattress.
Function and features:
| Weight of hexagonal wood barrel | 109kg, Cylinder weight: 140kg |
| Maximum size of mattress | 2.3m× 2.5m |
| Machine size(L× W× H) | 2500mm× 2800mm× 2200mm |
| Power | 380V, 1.5kw |
| Motor | ZheJiang ‘s CZPT Motor with reducer of Italy. |
| Speed adjustment | ZheJiang ‘s “ED Force” drive |
| Xihu (West Lake) Dis. bearing | Import from Japan. |
| Rack | Aluminum body and steel |
| Control elements | Imported |
(The table parameters for the company Standard Model parameters, we support customer customization parameters)
Our company Introduction:
HAIDA INTERNATIONAL is a professional manufacturer of various kinds of testing equipments over 24 years. CZPT products are widely used in paper products, packaging, ink printing, adhesive tapes, bags, footwear, leather products, environment, toys, baby products, hardware, electronic products, plastic products, rubber products and other industries, and applicable to all scientific research units, quality inspection institutions and academic fields.
Customer Feedback
FAQ:
Q:Are your company a trading one or a factory?
A:Factory + trade (integration),More than 12 years focusing on test equipment field,6 years exporting experience.
Q:After an order is placed, when to deliver?
A:Generally about 10-25days, If we have inventory, we can arrange shipment within 3 days.
Please be aware that our production lead times depend on specific items and item quantities.
Q:What about the warranty with after – sales services?
A:The testing machine is guaranteed for 12 months by HAIDA,we can help you to repair
your problem controller freely,even it’s not from our factory. After the warranty, the professional after-sale service team will provide perfect technical support and help guests solve problems encountered while using our product, handles guest problems and complaints in a professional and timely.
Q:What about the product’ services and quality?
A:Each equiopmentmust be carried out 100% quality examination and test when shipping and delivery goods. Product use training, each of our product provide video training to show you how to install & operate. We can arrange engineer to train the operation of equipment to customer’s company when you need. products are
widely recognized and trusted byusers.
Q: Can your products be customized?
A: Yes, our product can be customized according to your parameters.
How to tell if your driveshaft needs replacing
What is the cause of the unbalanced drive shaft? Unstable U-joint? Your car may make clicking noises while driving. If you can hear it from both sides, it might be time to hand it over to the mechanic. If you’re not sure, read on to learn more. Fortunately, there are many ways to tell if your driveshaft needs replacing.
unbalanced
An unbalanced driveshaft can be the source of strange noises and vibrations in your vehicle. To fix this problem, you should contact a professional. You can try a number of things to fix it, including welding and adjusting the weight. The following are the most common methods. In addition to the methods above, you can use standardized weights to balance the driveshaft. These standardized weights are attached to the shaft by welders.
An unbalanced drive shaft typically produces lateral vibrations per revolution. This type of vibration is usually caused by a damaged shaft, missing counterweights, or a foreign object stuck on the drive shaft. On the other hand, torsional vibrations occur twice per revolution, and they are caused by shaft phase shifts. Finally, critical speed vibration occurs when the RPM of the drive shaft exceeds its rated capacity. If you suspect a driveshaft problem, check the following:
Manually adjusting the imbalance of a drive shaft is not the easiest task. To avoid the difficulty of manual balancing, you can choose to use standardized weights. These weights are fixed on the outer circumference of the drive shaft. The operator can manually position the weight on the shaft with special tools, or use a robot. However, manual balancers have many disadvantages.
unstable
When the angular velocity of the output shaft is not constant, it is unstable. The angular velocity of the output shaft is 0.004 at ph = 29.5 and 1.9 at t = 1.9. The angular velocity of the intermediate shaft is not a problem. But when it’s unstable, the torque applied to it is too much for the machine. It might be a good idea to check the tension on the shaft.
An unstable drive shaft can cause a lot of noise and mechanical vibration. It can lead to premature shaft fatigue failure. CZPT studies the effect of shaft vibration on the rotor bearing system. They investigated the effect of flex coupling misalignment on the vibration of the rotor bearing system. They assume that the vibrational response has 2 components: x and y. However, this approach has limited application in many situations.
Experimental results show that the presence of cracks in the output shaft may mask the unbalanced excitation characteristics. For example, the presence of superharmonic peaks on the spectrum is characteristic of cracks. The presence of cracks in the output shaft masks unbalanced excitation characteristics that cannot be detected in the transient response of the input shaft. Figure 8 shows that the frequency of the rotor increases at critical speed and decreases as the shaft passes the natural frequency.
Unreliable
If you’re having trouble driving your car, chances are you’ve run into an unreliable driveshaft. This type of drivetrain can cause the wheels to stick or not turn at all, and also limit the overall control of the car. Whatever the reason, these issues should be resolved as soon as possible. Here are some symptoms to look for when diagnosing a driveshaft fault. Let’s take a closer look.
The first symptom you may notice is an unreliable drive shaft. You may feel vibrations, or hear noises under the vehicle. Depending on the cause, it could be a broken joint or a broken shaft. The good news is that driveshaft repairs are generally relatively inexpensive and take less time than a complete drivetrain replacement. If you’re not sure what to do, CZPT has a guide to replacing the U-connector.
One of the most common signs of an unreliable driveshaft is clanging and vibration. These sounds can be caused by worn bushings, loose U-joints, or damaged center bearings. This can cause severe vibration and noise. You can also feel these vibrations through the steering wheel or the floor. An unreliable driveshaft is a symptom of a bigger problem.
Unreliable U-joints
A car with an unreliable U-joint on the drive shaft can be dangerous. A bad u-joint can prevent the vehicle from driving properly and may even cause you trouble. Unreliable u-joints are cheap to replace and you should try getting parts from quality manufacturers. Unreliable U-joints can cause the car to vibrate in the chassis or gear lever. This is a sure sign that your car has been neglected in maintenance.
Replacing a U-joint is not a complicated task, but it requires special tools and a lot of elbow grease. If you don’t have the right tools, or you’re unfamiliar with mechanical terminology, it’s best to seek the help of a mechanic. A professional mechanic will be able to accurately assess the problem and propose an appropriate solution. But if you don’t feel confident enough, you can replace your own U-connector by following a few simple steps.
To ensure the vehicle’s driveshaft is not damaged, check the U-joint for wear and lubrication. If the U-joint is worn, the metal parts are likely to rub against each other, causing wear. The sooner a problem is diagnosed, the faster it can be resolved. Also, the longer you wait, the more you lose on repairs.
damaged drive shaft
The driveshaft is the part of the vehicle that connects the wheels. If the driveshaft is damaged, the wheels may stop turning and the vehicle may slow down or stop moving completely. It bears the weight of the car itself as well as the load on the road. So even a slight bend or break in the drive shaft can have dire consequences. Even a piece of loose metal can become a lethal missile if dropped from a vehicle.
If you hear a screeching noise or growl from your vehicle when shifting gears, your driveshaft may be damaged. When this happens, damage to the u-joint and excessive slack in the drive shaft can result. These conditions can further damage the drivetrain, including the front half. You should replace the driveshaft as soon as you notice any symptoms. After replacing the driveshaft, you can start looking for signs of wear.
A knocking sound is a sign of damage to the drive shaft. If you hear this sound while driving, it may be due to worn couplings, damaged propshaft bearings, or damaged U-joints. In some cases, the knocking noise can even be caused by a damaged U-joint. When this happens, you may need to replace the entire driveshaft, requiring a new one.
Maintenance fees
The cost of repairing a driveshaft varies widely, depending on the type and cause of the problem. A new driveshaft costs between $300 and $1,300, including labor. Repairing a damaged driveshaft can cost anywhere from $200 to $300, depending on the time required and the type of parts required. Symptoms of a damaged driveshaft include unresponsiveness, vibration, chassis noise and a stationary car.
The first thing to consider when estimating the cost of repairing a driveshaft is the type of vehicle you have. Some vehicles have more than one, and the parts used to make them may not be compatible with other cars. Even if the same car has 2 driveshafts, the damaged ones will cost more. Fortunately, many auto repair shops offer free quotes to repair damaged driveshafts, but be aware that such work can be complicated and expensive.
