Use of anti-theft door locks and maintenance precautions

Civil hardware accessories have been used for a long time, and many problems are prone to occur. In particular, the anti-theft door lock, this high-load operation of the parts, the service life is long, it is inevitable that there will be some trouble. It is often found that the damage of the security door locks in some users and friends' homes is often caused by improper use or maintenance.

The following points should be noted in the installation, use and maintenance of the anti-theft door lock:

1. Read the instructions carefully before installing the lock. Pay special attention to the fact that only the end with the fuse can be removed, and the end of the key should never be removed.

2, the installation of the door lock and the distance between the security door can not be less than 80mm, otherwise the security door will be locked on the door of the door, can not close the security door, can not play the role of anti-theft.

3, try not to add any oil in the lock core, if you want to lubricate should be painted with graphite or pencil lead.

4, the security door lock tongue and the surrounding "world lock" rod. It is necessary to add motor oil motorcycles, automobile machinery oil, sewing machine oil, etc. within three months, especially in wet and rainy days. (Note that any vegetable oil, including arowana oil, etc., cannot be used. Because it contains vegetable gum, the human body can absorb it and the machinery can not absorb it. After the water in the oil is dry, the vegetable glue is left, and the viscosity increases, which makes the security door more inflexible. ).

5, newly renovated friends, should be attached to the security door around the protective layer such as newspapers, so as not to cause a large amount of dust caused by home adsorption on the security door bar to reduce the service life. And after the decoration is completed, check whether there are decoration residues in the surrounding of the door frame to remove the oil and add the oil.

6. Check the matching clearance between the lock body and the lock plate. The fit between the lock tongue and the lock plate hole is appropriate. The matching clearance between the door and the door frame is 1.5mm-2.5mm. If changes are found, adjust the position of the hinge or lock plate on the door. At the same time, pay attention to the shrinkage and thermal expansion caused by the weather (wet spring, dry in winter) to ensure the clearance between the door and the door frame, the lock body and the lock plate is reasonable, so as to ensure the smooth use of the lock.

7. Locking in the process of opening and closing the door on weekdays, it is best to hold the handle and screw the locking tongue into the lock body. After closing the door, let go of the hand, do not force the door, otherwise it will reduce the service life.

8. Do not wipe the lock body and handle with a damp cloth, because some metal locks will rust; alloy locks will wear away the coating and lose the aesthetic effect.

Editor in charge: Xu Yuehua

PEI plastics (polyetherimide plastics) is an amber transparent solid. It has an inherent flame retardancy and low smoke concentration without adding any additives. The oxygen index is 47%, and the combustion level is ul94-v-0, and the density is 1.28~1.42 g/cm3.

PEI plastics has a strong thermal stability, and even the non-enhanced PEI plastics still has good toughness and strength.Therefore, the high thermal stability of PEI plasticsis used to make high temperature heat-resistant devices.

PEI plastics has excellent mechanical properties, electrical insulation performance, radiation resistance, high temperature resistance and abrasion resistance, and can be used by microwave.The PEI plastics also has good flame retardancy, chemical resistance and electrical insulation.Vitrification transformation temperature is very high, up to 215 ℃.PEI plastics also has a very low shrinkage rate and good mechanical properties.Adding fiberglass, carbon fiber or other fillings to enhance the purpose of modification;And other engineering plastics of heat-resistant polymer alloys, can be in 160 ~ 180 ℃ under the working temperature of use for a long time.

PEI plastic rods

The long-term use of polyether amines in the us underwriters laboratory is 338T and 356T (according to the grade), and the combustion rating reaches UL94V - 0 (10 mille thickness).The oxygen index is 47, and the polyetherimide is in line with the requirements of the aircraft for the requirements of the FAA's flame retardant and thermal release material standards.It has a glass transition temperature of 419F and is allowed to be used intermittently under 392F, at higher temperatures, resulting in a short-term shift.Under 356T, the tensile temperature and flexural modulus were above 41 and 2068MPa respectively.The material reinforced with Glass Fiber and carbon fiber has higher strength and rigidity under the transition temperature of glass.

PEI plastics long-term resistance to creep under high temperature and stress allows it to replace metals and other materials in many structural devices.PEI plastics shows good performance in variable temperature, humidity and frequency.The low dissipation factor at GHz frequency makes the polyetherimide have high microwave wearability.Its ionic pollutant is low, at 250F100 % R.H.And 207kPa after 120 hours of water extraction with the conductivity, at 20 megaohm, it can be used as an electronic sensor element insulation.

PEI plastics is a fine coating and film forming material which can be used for the coating and film of electronic industry, and can be used in manufacturing aperture < 0.1 mu m, with high permeability microporous diaphragm.It can also be used as high temperature adhesive and high strength fiber. 

Application field

Since PEI plastics has excellent comprehensive and balanced performance, PEI plastics has been applied to the departments of electronics, motor and aviation, and used as metal substitute materials for traditional products and cultural life supplies.Using PEI plastics instead of metal to make optical fiber connector, PEI plastics can optimize the structure of the component, simplify its manufacturing and assembly steps, and maintain a more precise size.Used in automobile industry, such as high temperature fittings for manufacturing, the high power lamp and light, control the car cabin outside temperature sensor (air conditioning temperature sensor) and the control of air and fuel mixture temperature sensor (effective combustion temperature sensor).Also can be used for high temperature erosion of lubricating oil vacuum pump impeller, distilling apparatus that operate at 180 ℃ of ground glass joints (following), the lighting of anti fog light reflector.

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