The types and application of stretch film
packaging machine screw thread.
As food machinery automatic vacuum
packaging machine, thread is a common element, stretch film packaging machine as a kind of automatic vacuum packaging machine, thread in it also played a vital role, stretch film packaging machine thread is refers to the spare parts such as screws, bolts, nuts and screw on cylinder or cone, along the spiral line, which is formed by the continuous bump and grooves with the same profile.
a, types of thread
the types and application of stretch film packaging machine screw thread.
Stretch film, many different kinds of vacuum packaging machine screw, the cylinder and the outer surface of cone thread is called external thread, thread in the face of hole wall treatment called internal thread, according to grain direction is different, can be divided into screwing clockwise screwing in the right thread and reverse clockwise left thread.
stretch film vacuum packaging machine thread screw to the right hand can also be used to determine the palms against his, thread rotate to consistent with the right thumb pointing to the right thread, instead of the left screw drink, common thread right.
stretch film packaging machine according to the number of the spiral line is different, also can be divided into single thread (
Namely along a spiral thread) which is formed by the
And a thread (
Namely along the two or more than two in the circumferential equidistant distribution formed by spiral thread)
, according to the shape of the screw thread section, but also can be divided into a triangle, trapezoid, sawtooth thread, rectangular and other special shapes.
2, thread USES the
the types and application of stretch film packaging machine screw thread.
General thread according to different purposes of, can be divided into two categories, the connecting thread and transmission.
the connecting thread for triangular thread mostly, and it is with a single line.
General connection using metric thread, because of the common thread section is an equilateral triangle, high strength and self-locking performance is good, especially fine thread, big and small pitch, because its path so higher strength, self-locking performance better.
But fine thread is easy to wear and easy to slip.
stretch film packaging machine, pipe thread connection is mainly used in water, gas, lubrication and electrical and high temperature, high pressure pipeline system.
Pipe thread because with thin wall, to prevent excessive weaken the strength of pipe wall, so the use of special fine thread, called pipe thread.
pipe screw into the thread sealing pipe thread and thread sealing pipe thread.
stretch film packaging machine of screw thread seal pipe thread, thread pair of internal and external combustion lines are cylindrical, itself has no seal, so called the thread sealing pipe thread.
if you want after the connection has a sealing, vice outside of the seal face can be pressed tight fitting threads or add sealing material on the surface of the seal.
Use thread sealing pipe thread, it includes with conical thread and conical and cylindrical and conical external thread form two kinds of connection.
That kind of way as a threaded connection itself has certain ability to seal, so called use thread sealing pipe thread.
the transmission thread multi-purpose ladder, one-way transmission commonly used serrated thread and rectangular screw transmission rate is high, but the strength difference between the neutral is also poor.
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