Roving strand strength dynamometer

Abstract

A roving strand strength dynamometer is mainly composed of a base, a lower force measuring rod, an upper force measuring rod and a force measuring scale rod, a lower force measuring rod support and a supporting seat are fixedly arranged on the base, the force measuring scale rod is connected with the top of the supporting seat through a supporting shaft, scales are arranged on the force measuring scale rod, the force measuring scale rod is movably connected with a hanging frame, and a force measuring weight is hung on the hanging frame. The lower force measuring rod and the upper force measuring rod penetrate through the upper portion of the lower force measuring rod support and the rear end of the force measuring scale rod respectively, and the upper control frame is connected between the lower force measuring rod and the upper force measuring rod. The roving strength measuring device adopts a steelyard weighing structure, utilizes a simple and convenient method to accurately measure the strength value of roving, guides a technician to reasonably control the roving twist, and has the advantages of being reasonable in design, convenient to operate and accurate in measurement.

Description

Technical Field

[0001] This utility model relates to the field of textile testing instruments, specifically to a roving yarn tensile strength tester. Background Technology

[0002] Among the indicators of semi-finished cotton textile products, the roving strength is a crucial factor in the spinning process. Roving strength, also known as yarn strength, refers to the tensile breaking strength of a yarn when it is coiled into small loops, also called a strand. In the metric system, 100 loops of yarn are measured in kilogram-force (kgf); in the imperial system, 80 loops of yarn are measured in pound-force (lbf). Roving strength is the lifeblood of spinning. If the roving strength is too high, it will fail to properly draft the yarn during the spinning process, damaging the spinning rollers. If the roving strength is too low, it will break during the spinning process. Both excessively high and low roving strength will negatively impact the spinning process, leading to decreased spinning efficiency and deteriorated quality.

[0003] Currently, there is no standardized instrument for testing roving strength. Cotton mills typically control roving strength by feeling it by hand and then adjusting the twist coefficient. However, relying on touch to determine roving strength results in significant errors, as different people have different senses. This poses a major challenge to the effective and accurate control of roving strength. In production, poor roving strength control frequently leads to fluctuations in yarn quality and performance. Utility Model Content

[0004] This invention provides a roving strand strength tester to solve the problem that spinning enterprises lack specialized instruments for testing the strand strength of rovings.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A roving yarn strength measuring instrument mainly consists of a base, a lower measuring rod, an upper measuring rod, and a measuring scale rod. A lower measuring rod bracket and a support are fixedly installed on the base. The measuring scale rod is connected to the top of the support through a support shaft. The measuring scale rod is set with a scale. The measuring scale rod is movably connected to a hanging frame. A measuring weight is hung on the hanging frame. The lower measuring rod and the upper measuring rod pass through the upper part of the lower measuring rod bracket and the rear end of the measuring scale rod, respectively. An upper control frame is connected between the lower measuring rod and the upper measuring rod.

[0007] A lower control frame is installed on the base on the front side of the aforementioned support. A U-shaped groove is installed on the top of the lower control frame, and the force measuring rod floats up and down in the U-shaped groove.

[0008] The length from the support point of the aforementioned force measuring rod to its front end is 5 times the length from the support point to the rear end of the force measuring rod.

[0009] This utility model of a roving yarn strength measuring instrument adopts a lever balance structure. The measuring weights are standard measuring weights (metal) with a mass range of 50g to 500g and eight weight levels. The length from the support point of the measuring rod to its right end (750mm) is five times the length from the support point to the measuring rod (150mm). The measuring rod is set with scale values. The scale value is 1.0 at 150mm to the right of the support point. Every 25mm to the right, there is a scale value corresponding to the lever arm length (mm) / 150. The weighing scale range is 1.0 times / 5.0 times.

[0010] When measuring roving strength using this invention, the roving test sample is wound twice along the axis at the marked point on the upper force measuring rod of the roving strength tester, allowing the outer yarn to press against the inner yarn to create self-locking. Then, it is wound vertically downwards to the lower force measuring rod, with five evenly spaced turns. At the upper force measuring rod, the roving test sample is wound twice to finish, and a 10cm long yarn tail is twisted off. The yarn tail is then inserted through the inside of the arranged yarn strands to create self-locking. The force measuring weight is moved to the 0 position. The force measuring rod is dragged with the right hand, and the upper control frame is opened with the left hand to taut the roving test sample. An appropriate weight is hung on the hanger, and the position of the weight is gradually moved to the right until the roving sample slowly breaks. The scale value at the weight hanger point is read, and the roving breaking strength (force measuring rod scale value × weight of the weight) is calculated.

[0011] This utility model adopts a lever scale weighing structure, which uses a very simple method to accurately measure the strength value of roving, and guides process technicians to reasonably control the twist of roving. It has the advantages of reasonable design, convenient operation and accurate measurement. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] The diagram shows: 1. Base, 2. Lower force measuring rod bracket, 3. Support, 4. Lower force measuring rod, 5. Lower control frame, 6. Upper force measuring rod, 7. Force measuring weight, 8. Support shaft, 9. Hanger, 10. Force measuring scale rod, 11. Scale, 12. Roving test sample, 13. Upper control frame. Detailed Implementation

[0015] As shown in the figure, a roving yarn strength measuring instrument mainly consists of a base 1, a lower measuring rod 4, an upper measuring rod 6, and a measuring scale rod 10. A lower measuring rod support 2 and a support 3 are fixedly mounted on the base 1. The measuring scale rod 10 is connected to the top of the support 3 via a support shaft 8. The measuring scale rod 10 has a scale 11. A hanging frame 9 is movably connected to the measuring scale rod 10, and a measuring weight 7 is hung on the hanging frame 9. The lower measuring rod 4 and the upper measuring rod 6 pass through the upper part of the lower measuring rod support 2 and the rear end of the measuring scale rod 10, respectively. An upper control frame 13 connects the lower measuring rod 4 and the upper measuring rod 6. A lower control frame 5 is mounted on the base in front of the support 3. A U-shaped groove is provided on the top of the lower control frame 5, and the measuring scale rod 10 floats up and down in the U-shaped groove. The length from the support shaft 8 point of the measuring scale rod 10 to its front end is five times the length from the support shaft 8 point to the rear end of the measuring scale rod.

[0016] This utility model of a roving yarn strength measuring instrument adopts a lever balance structure. The measuring weights are standard measuring weights (metal) with a mass range of 50g to 500g and eight weight levels. The length from the support point of the measuring rod to its right end (750mm) is five times the length from the support point to the measuring rod (150mm). The measuring rod is set with scale values. The scale value is 1.0 at 150mm to the right of the support point. Every 25mm to the right, there is a scale value corresponding to the lever arm length (mm) / 150. The weighing scale range is 1.0 times / 5.0 times.

[0017] When measuring roving strength using this invention, the roving test sample 12 is wound twice along the axis at the marked point on the upper force measuring rod of the roving strength tester, allowing the outer yarn to press against the inner yarn to create self-locking. Then, it is wound vertically downwards to the lower force measuring rod, with five evenly spaced turns. At the upper force measuring rod, the roving test sample 12 is wound twice to finish, and a 10cm long yarn tail is twisted off. The tail of the roving test sample 12 is then inserted into the inside of the arranged yarn strands to create self-locking. The force measuring weight is moved to the 0 position. The right hand drags the force measuring rod, while the left hand opens the upper control frame to taut the roving test sample. An appropriate weight is hung on the hanger, and the position of the weight is gradually moved to the right until the roving sample slowly breaks. The scale value at the weight hanger point is read, and the roving breaking strength (force measuring rod scale value × weight of the weight) is calculated.

Claims

1. A roving filament strength tester, characterized by: It mainly consists of a base, a lower force measuring rod, an upper force measuring rod, and a force measuring scale rod. The lower force measuring rod bracket and support are fixedly installed on the base. The force measuring scale rod is connected to the top of the support through a support shaft. The force measuring scale rod is set with a scale. The force measuring scale rod is movably connected to a hanging bracket. A force measuring weight is hung on the hanging bracket. The lower force measuring rod and the upper force measuring rod pass through the upper part of the lower force measuring rod bracket and the rear end of the force measuring scale rod, respectively. The lower force measuring rod and the upper force measuring rod are connected to an upper control frame.

2. The roving yarn tensile strength measuring instrument according to claim 1, characterized in that: A lower control frame is installed on the base on the front side of the support, and a U-shaped groove is installed on the top of the lower control frame.

3. The roving ply strength measuring instrument according to claim 1, characterized in that: The length from the support point of the force measuring rod to its front end is 5 times the length from the support point to the rear end of the force measuring rod.

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