Polypropylene monofilament stretching and heat setting device

Abstract

The utility model discloses a polypropylene monofilament stretching and heat-setting device, which belongs to the technical field of stretching and setting and comprises a heating shell, an inlet and an outlet are arranged on the heating shell, a stretching shell is arranged below the heating shell, a plurality of turning rollers which are rotatably connected are arranged on the inner circumference of the heating shell, monofilaments are wound on the peripheries of the turning rollers, and the heating shell is provided with a heating cavity. A surrounding frame for containing water liquid is installed at the inner bottom of the steering roller, a heating rod is arranged on the lower portion in the surrounding frame, one side of the surrounding frame communicates with a water guide pipe, one end of the water guide pipe penetrates through the baking shell and is provided with a flaring, a plurality of heating rollers are arranged on the inner circumference of the stretching shell, and a heat insulation cavity is formed in the center of each heating roller; a plurality of heating pieces for heating are installed in an inner cavity of the outer side of the heating roller, and an edge arc cover is installed in a cavity of the outer side of the heating roller. Compared with a comparison device, the polypropylene monofilament stretching and heat setting device has the advantages that self-adaptive stretching and setting can be realized, the occurrence of tensile failure is reduced, and the disassembly, assembly and maintenance are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of stretching and shaping, in particular to a polypropylene monofilament stretching and heat shaping device. Background Art

[0002] Polypropylene monofilament is a hydrophobic polymer compound with no polar groups in its molecular structure, low hygroscopicity and strong electrostatic properties. At present, polypropylene monofilament is widely used in our lives and is one of the main materials for making ton bags or ton bags. The main production process is: first purchase monofilament slices, suck them into the spinning box, heat and melt them, cool and solidify them into monofilaments, and keep the water temperature at around 40 degrees; then the polypropylene monofilament is stretched, and its molecular structure is basically formed after stretching. At this time, some molecular segments are in a relaxed state, and some molecular segments are in a tense state. In order to eliminate internal stress and improve the stability of the fiber structure, the polypropylene monofilament needs to undergo subsequent heat treatment processes, namely heat setting. Heat setting eliminates internal stress and improves the dimensional stability of the monofilament; improves the physical and mechanical properties of the fiber, improves the elasticity, knotting hardness and wear resistance of the monofilament; and finally forms highly elastic and wear-resistant polypropylene monofilament. The existing heat setting methods are mainly divided into two types, namely wet heat setting and dry heat setting.

[0003] A hydrophilic polypropylene monofilament stretching and heat setting device with publication number CN214354134U, by arranging steam nozzles at the top and bottom of the stretching box, the polypropylene monofilament can be fully and evenly contacted with the water vapor sprayed by the steam nozzles, and two sets of heating rollers are arranged at the same time, and protective sleeves are arranged on the outside of the heating rollers to reduce the heat dissipation generated by the heating rollers, so that the heat generated by the heating rollers can be fully contacted with the polypropylene monofilaments, effectively improving the stretching effect of the polypropylene monofilaments; by arranging threaded sleeves, threaded shafts, pressing blocks and fixed blocks, the polypropylene monofilaments can be squeezed and fixed, driving the squeezing rollers to move up and down and rotate, so as to roll and squeeze the polypropylene monofilaments, further improving the stretching effect of the polypropylene monofilaments. The stretching of the above-mentioned device is achieved by hydraulic rod pressure delivery, in which the force is too large to cause the monofilaments to break. Utility Model Content

[0004] The utility model aims to provide a polypropylene monofilament stretching and heat setting device to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polypropylene monofilament stretching and heat setting device, comprising a drying shell, an inlet and an outlet are provided on the drying shell, and a stretching shell is arranged below the drying shell, a plurality of rotatably connected turning rollers are arranged on the inner periphery of the drying shell, and a monofilament is wound around the outer periphery of the turning roller, a frame for containing water is installed on the inner bottom of the turning roller, and a heating rod is arranged on the inner lower part of the frame, a plurality of heating rollers are arranged on the inner periphery of the stretching shell, and a heat-insulating cavity is arranged in the center of the heating roller, a plurality of heating elements are installed in the outer inner cavity of the heating roller, and an edge arc cover is installed in the outer cavity of the heating roller.

[0006] In a further embodiment, one side of the surrounding frame is connected to a water pipe, and one end of the water pipe passes through the drying shell and is equipped with a flare.

[0007] In a further embodiment, a mobile power source is installed in the heat-insulating cavity at the center of the heating roller, and the mobile power source is electrically connected to the plurality of heating elements.

[0008] In a further embodiment, a top seal is provided at one end of the heating roller, and a plurality of clamping columns are provided on one side of the top seal and are tenoned into the heating roller and fixed by bolts.

[0009] In a further embodiment, one side of the top seal is rotatably connected to a rotating column, and a sliding block is provided on a side of the plurality of rotating columns on one side away from the top seal.

[0010] In a further embodiment, a plurality of slide grooves are provided on one side of the stretching shell, and the inner circumference of the slide grooves is slidably connected to the sliding block.

[0011] In a further embodiment, a compression spring is provided on one side of the sliding block, and an end of the sliding block is fixed to the rotating column by bolts.

[0012] In a further embodiment, an exhaust fan is installed on one side of the stretching shell, and an exhaust pipe is connected between the air outlet of the exhaust fan and the heating shell.

[0013] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0014] The frame design inside the drying shell and the heating rod design inside the frame, through the design of holding water inside the frame, when the heating rod is running, the water can be heated to produce steam, further wet the monofilament, and complete the preparation work before stretching. The design of the water guide pipe and the expansion port is convenient for adding and observing the water;

[0015] The design of the heating element on the outside of the heating roller and the shielding of the side arc cover, the design of the heat-insulating cavity in the center of the heating roller and the design of placing a mobile power supply in the center facilitate power supply, so that the monofilament passing through it can be heated and shaped;

[0016] The slide groove design on one side of the stretching shell and the sliding block design on the inner periphery of the slide groove, combined with the connection of the sliding block, rotating column, top seal and heating roller, can generate adaptive pressure on the monofilament through the elastic design of the compression spring, realize adaptive stretching, and have better stability. The heating roller connection parts are easy to disassemble and assemble, which is convenient for maintenance.

[0017] Compared with the comparison device, the polypropylene monofilament stretching and heat setting device can achieve adaptive stretching and setting, reduce the occurrence of breaking, and is convenient for disassembly, assembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a central cross-sectional view of the drying shell of the utility model;

[0021] Figure 3 It is a central cross-sectional view of the stretch shell of the utility model;

[0022] Figure 4 This is an exploded view of the connection structure of the heating roller of the utility model.

[0023] Description of reference numerals:

[0024] 1. Heating shell; 2. Stretching shell; 3. Turning roller; 4. Enclosure frame; 5. Screen plate; 6. Heating rod; 7. Water guide pipe; 8. Heating roller; 9. Heating element; 10. Side arc cover; 11. Bottom cover; 12. Top seal; 13. Rotating column; 14. Exhaust fan; 15. Exhaust pipe;

[0025] 21. Slide groove; 22. Compression spring; 23. Sliding block. DETAILED DESCRIPTION

[0026] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0027] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0028] The connection method can be bonding, welding, bolt connection, etc., depending on actual needs.

[0029] See also Figures 1 to 4 The main structure of the device body includes a drying shell 1 and a stretching shell 2. A turning roller 3 is arranged on the inner periphery of the drying shell 1. A central axis is arranged at the center of the turning roller 3. The central axis is rotatably connected to the inner wall of the drying shell 1. An inlet and an outlet are respectively provided on the upper half of one side and the bottom side of the drying shell 1. In order to expand the polypropylene monofilament, the polypropylene monofilament passes through the inlet, bypasses a plurality of turning rollers 3 and passes through the outlet to achieve complete expansion.

[0030] In order to achieve heating, a surrounding frame 4 is installed at the inner bottom of the heating shell 1, and water is contained inside the surrounding frame 4. A mesh plate 5 is installed on the top of the surrounding frame 4. The mesh plate 5 is designed as a mesh frame. A heating rod 6 is installed at the inner bottom of the surrounding frame 4. The operation of the heating rod 6 can heat the water to generate steam, and the steam will heat the polypropylene monofilament.

[0031] In order to facilitate the addition of liquid to the frame 4, a water pipe 7 is installed on one side of the upper half of the frame 4. One end of the water pipe 7 passes through the drying shell 1 and is equipped with a flared port. The flared port design facilitates the addition of water. The water pipe 7 can be designed to be transparent to facilitate observation of the water level.

[0032] See also Figures 2 to 4 In order to achieve shaping, a plurality of heating rollers 8 are arranged on the inner circumference of the stretching shell 2, a plurality of inner recesses are provided on the outer side of the heating roller 8, a heating element 9 is installed on the inner recess, the heating element 9 may be a heating wire, a heating tube, etc., an arc cover 10 is installed on the outer side of the inner recess, a heat-insulating cavity is provided in the center of the heating roller 8, a mobile power source is arranged on the inner circumference of the heat-insulating cavity, and the mobile power source is connected to the plurality of heating elements 9, in order to prevent the mobile power source from being exposed, a bottom cover 11 is installed on the end of the heating roller 8;

[0033] The other end of the heating roller 8 is provided with a top seal 12, one side of the top seal 12 is provided with a clamping column, the end of the heating roller 8 is provided with a clamping groove adapted to the clamping column, the clamping column and the clamping groove can be fixed by bolts, and the center of the top seal 12 is rotatably connected with a rotating column 13;

[0034] An inlet and an outlet are provided on one side of the top and the lower half of one side of the stretching shell 2. The polypropylene monofilament passes through the stretching shell 2 and is wrapped around the outer periphery of the heating roller 8. An external winding device can be provided at the outlet end of the polypropylene monofilament to achieve the functions of collection and drawing.

[0035] A plurality of slide grooves 21 are provided on one side of the stretching shell 2, and a sliding block 23 is provided on the inner periphery of the slide groove 21 for limiting sliding. A compression spring 22 is provided on one side of the sliding block 23, and the elastic restoring force of the compression spring 22 can enable the sliding block 23 to have a force to move in one direction, and one side of the sliding block 23 is fixed to a plurality of rotating columns 13 on one side;

[0036] The multiple rotating columns 13 on the other side are rotatably connected to the inner wall of the stretching shell 2. Multiple motors are installed on one side of the stretching shell 2. The driving end of the motor passes through the stretching shell 2 and is connected to the corresponding rotating columns 13. When the motor is running, it can further drive the heating roller 8 on one side to rotate, thereby realizing the conveying and stretching of the polypropylene monofilament.

[0037] In order to extract moisture, an exhaust fan 14 is installed on one side of the stretching shell 2. The suction end of the exhaust fan 14 is connected to the interior of the stretching shell 2. An exhaust pipe 15 is connected between the air outlet of the exhaust fan 14 and the heating shell 1. When the exhaust fan 14 is running, moisture can be sucked into the interior of the heating shell 1.

[0038] The above-mentioned components and electrical equipment are all existing technologies or existing feasible technologies. The working principles, sizes and models are irrelevant to the functions of this application, so they are not described in detail, and they are all controlled by remote control switches.

[0039] How it works

[0040] When the polypropylene monofilament stretching and heat setting device is needed, the heating rod 6 is started to heat the water inside the surrounding frame 4, and steam is generated to heat the polypropylene monofilament inside the heating shell 1;

[0041] At the same time, the external winding device is started to wind and draw the polypropylene monofilament. During the drawing process, the heating element 9 is operated to generate heat, heat the heating roller 8, and heat and shape the polypropylene monofilament.

[0042] The limited sliding connection design between the slide groove 21 and the sliding block 23, combined with the elastic restoring force of the compression spring 22, can move the heating roller 8 outward to generate a pulling force, thereby achieving the stretching of the polypropylene monofilament. While stretching, it is heated and shaped by the heating roller 8 to complete the processing and is then wound up by an external winding device.

[0043] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polypropylene monofilament stretching and heat setting device, comprising a heating shell (1), wherein an inlet and outlet are provided on the heating shell (1), and a stretching shell (2) is arranged below the heating shell (1); Features: The inner periphery of the heating shell (1) is provided with a plurality of rotatably connected steering rollers (3), and the outer periphery of the steering roller (3) is wound with a monofilament, the inner bottom of the steering roller (3) is provided with a frame (4) for containing water, and the inner lower part of the frame (4) is provided with a heating rod (6), the inner periphery of the stretching shell (2) is provided with a plurality of heating rollers (8), and the center of the heating roller (8) is provided with a heat-insulating cavity, the outer inner cavity of the heating roller (8) is provided with a plurality of heating elements (9), and the outer cavity of the heating roller (8) is provided with an arc cover (10).

2. A polypropylene monofilament stretching and heat setting device according to claim 1, characterized in that: One side of the enclosure frame (4) is connected to a water pipe (7), and one end of the water pipe (7) passes through the drying shell (1) and is provided with a flared opening.

3. A polypropylene monofilament stretching and heat setting device according to claim 1, characterized in that: A mobile power source is installed in the heat-insulating cavity at the center of the heating roller (8), and the mobile power source is electrically connected to a plurality of heating elements (9).

4. A polypropylene monofilament stretching and heat setting device according to claim 3, characterized in that: A top seal (12) is provided at one end of the heating roller (8), and a plurality of clamping columns are provided on one side of the top seal (12) and are tenoned into the heating roller (8) and fixed by bolts.

5. A polypropylene monofilament stretching and heat setting device according to claim 4, characterized in that: One side of the top seal (12) is rotatably connected to a rotating column (13), and a sliding block (23) is provided on a side of the plurality of rotating columns (13) on one side away from the top seal (12).

6. A polypropylene monofilament stretching and heat setting device according to claim 5, characterized in that: A plurality of slide grooves (21) are provided on one side of the stretching shell (2), and the inner circumference of the slide grooves (21) is slidably connected to the sliding blocks (23).

7. A polypropylene monofilament stretching and heat-setting device according to claim 5, characterized in that: A compression spring (22) is provided on one side of the sliding block (23), and the end of the sliding block (23) is fixed to the rotating column (13) by means of bolts.

8. The polypropylene monofilament stretching and heat setting device according to claim 1, characterized in that: An exhaust fan (14) is installed on one side of the stretching shell (2), and an exhaust pipe (15) is connected between the air outlet of the exhaust fan (14) and the heating shell (1).

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