Yarn cutting system of SMC (Sheet Molding Compound) machine

Abstract

The utility model discloses a yarn cutting system of an SMC (Sheet Molding Compound) machine, which is characterized in that a yarn sensor is arranged on a frame body, a yarn guide tube is arranged on the rear side of the yarn sensor, a magnetic force eliminating device is arranged by being matched with the yarn guide tube, a heating yarn winding roller is arranged at the lower part of the yarn guide tube, and a cutting table is arranged on the rear side of the heating yarn winding roller. An extrusion conveying roller and a cutting roller are arranged on the cutting table, the cutting roller is fixed to the cutting table, a transverse adjusting groove is formed corresponding to the cutting table, a tool adjuster is arranged in the transverse adjusting groove, and the cutting length of the cutting roller on the cutting table can be adjusted through the tool adjuster. The yarn passing state can be effectively detected through the yarn sensor, the magnetic force eliminating plate, the heating yarn winding roller, the cutter distance adjuster and the like, the fiber yarn content instability in the production process is avoided, the yarn flying phenomenon in the production process can be avoided, infiltration of fiber yarn and resin paste is better, and meanwhile the fiber length is convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material processing, in particular to a SMC sheet machine cutting system. Background Art

[0002] In the field of SMC material processing technology, sheet molding compound is required. This material is a composite material composed of resin, filler and reinforcing fiber. During processing, the reinforcing fiber is cut into fixed lengths by the fiber cutting knife roller, and then evenly laid in the middle of the resin paste after being scattered by the yarn beater. After the fiber passes through the yarn guide tube, it is driven forward by the pressure friction rolling of the upper and lower yarn cutting rubber rollers, and is cut by the cutter in the cutting knife roller groove.

[0003] There are many problems with the current yarn cutting scheme, which are mainly reflected in the following aspects: 1. Since the fiber yarn is advanced by the friction between the upper and lower yarn cutting rubber rollers, the fiber yarn bundles have different wrapping forces, which easily cause the two rubber rollers to slip. If a bundle of fiber yarn cannot be eaten, in serious cases, the fiber bundle will be returned to the fiber yarn roller under the gravity of the fiber bundle, resulting in inaccurate fiber content. Moreover, there is no alarm system to prompt the lack of such fiber bundles, and external operators cannot find it in time, which will eventually have an adverse effect on the quality of the formed sheet; 2. When the fiber yarn passes through the yarn guide tube, the friction causes the fiber to generate static electricity, causing the fiber to fly when cutting; 3. During winter production, the temperature of the resin paste is generally 35-40℃, and the temperature of the fiber yarn decreases, resulting in a decrease in the wetting effect when combined with the resin paste. When facing the production of formulas with different fiber lengths, it is necessary to fine-tune the distance between the cutting knife roller and the yarn cutting rubber roller to obtain different fiber lengths. However, the existing production equipment often takes about 1 hour to adjust the knife distance, and it is not accurate after adjustment. During the adjustment process, there is a risk of increasing the viscosity of the resin paste, which affects the quality of the sheet.

[0004] In view of the drawbacks of the prior art, as technicians in this field, it is very necessary to improve the existing SMC sheet machine cutting yarn, the purpose of which is to solve the drawbacks of the prior art. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model proposes an SMC sheet machine yarn cutting system, which can effectively improve the cutting efficiency and cutting accuracy by improving the existing SMC sheet machine yarn cutting system.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A yarn cutting system for an SMC sheet machine comprises a frame, a yarn sensor is arranged on the frame, a yarn guide tube is arranged at the rear side of the yarn sensor, a magnetic force elimination device is arranged in conjunction with the yarn guide tube, one or more heated yarn winding rollers are arranged at the lower part of the yarn guide tube, a cutting table is arranged at the rear side of the heated yarn winding roller, an extrusion conveying roller and a cutting roller are arranged on the cutting table, the cutting roller is fixed on the cutting table, a lateral adjustment groove is arranged corresponding to the cutting table, a tool adjuster is arranged in the lateral adjustment groove, and the cutting length of the cutting roller on the cutting table can be adjusted by the tool adjuster.

[0008] The yarn sensor is fixed on the front side of the frame, and includes an insertion tube and a yarn passing sensor fixed on the insertion tube. When the device is used, the yarn is led out from the insertion tube and enters the yarn passing sensor for thread passing sensing.

[0009] The heated yarn winding roller is provided with a yarn running groove, and a heating device is provided inside the heated yarn winding roller, and the heated yarn winding roller is heated by the heating device.

[0010] A top adjustment groove is arranged on the top crossbeam of the cutting table, a vertical driving cylinder is arranged inside the top adjustment groove, an upper driving roller is arranged on the bottom driving end of the vertical driving cylinder, and a lower driving roller is arranged inside the cutting table corresponding to the upper driving roller to cooperate with the upper driving roller to realize extrusion and conveying; a cutting roller is arranged on the side of the lower driving roller.

[0011] The yarn sensor can detect the continuity of yarn feeding. When the upper and lower yarn cutting rubber rollers slip with the fiber bundle, the fiber bundle no longer feeds the yarn and the yarn sensor gives an alarm.

[0012] The magnetic elimination device is a plate-shaped structure, which is horizontally arranged at the lower part of the yarn guide tube. The static electricity generated by the fiber after passing through the yarn guide tube is eliminated by the magnetic elimination plate.

[0013] The heating yarn winding rollers are arranged in three groups, and the yarns run in an S state when passing through.

[0014] The knife distance regulator has 4 gears, and the gears are adjusted by a rotating wheel. The gears are respectively 12.7 mm (0.5 inches), 25.4 mm (1 inch), 38.1 mm (1.5 inches), and 50.8 mm (2 inches) in yarn cutting length.

[0015] The utility model has the following beneficial effects: a yarn sensor is arranged on the frame, a yarn guide tube is arranged at the rear side of the yarn sensor, a magnetic force elimination device is arranged in conjunction with the yarn guide tube, a heating yarn winding roller is arranged at the lower part of the yarn guide tube, a cutting table is arranged at the rear side of the heating yarn winding roller, an extrusion conveying roller and a cutting roller are arranged on the cutting table, the cutting roller is fixed on the cutting table, a lateral adjustment groove is arranged corresponding to the cutting table, a tool regulator is arranged in the lateral adjustment groove, and the cutting length of the cutting roller on the cutting table can be adjusted by the tool regulator. The utility model can effectively detect the yarn passing state through the yarn sensor, the magnetic force elimination plate, the heating yarn winding roller and the knife distance regulator, etc., avoid the unstable fiber yarn content during production, promote the production without flying yarn, the fiber yarn and the resin paste are more excellently impregnated, and the fiber length is convenient to adjust. The utility model can greatly improve the production quality and efficiency of SMC sheets, and make the production more stable and controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a side view of the structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the yarn guide tube;

[0020] Figure 4 for Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0021] Figure 5 for Figure 1 A schematic diagram of the structure of the middle B region;

[0022] In the figure, 1, frame, 2, yarn sensor, 21, insertion tube, 22, yarn passing sensor, 3, heating winding roller, 31, yarn trough, 32, heating device, 4, magnetic elimination plate, 5, yarn guide tube, 51, locking end, 52, vertical section, 53, arc section, 6, cutting table, 61, top crossbeam, 62, top adjustment slot, 63, vertical drive cylinder, 64, upper adjustment slot, 65, side adjustment slot, 66, tool adjuster, 67, drive shaft, 7, cutting roller, 8, upper drive roller, 9, lower drive roller. DETAILED DESCRIPTION

[0023] The present invention is further described below through implementation modes. It should be understood that the following embodiments are merely exemplary explanations, and those skilled in the art may make technical improvements or extensions under the guidance of the embodiments, and such improvements should fall within the protection scope of the present invention.

[0024] As shown in the accompanying drawings, a yarn cutting system for an SMC sheet machine includes a frame 1, on which a yarn sensor 2 is arranged. The yarn sensor 2 is fixed on the front side of the frame 1, and includes an insertion tube 21 and a yarn passing sensor 22 fixed on the insertion tube 21. When the device is in use, the yarn is led out from the insertion tube 21 and enters the yarn passing sensor 22 for thread passing sensing.

[0025] A yarn guide tube 5 is provided on the rear side of the yarn sensor 2, and a magnetic elimination device is provided in conjunction with the yarn guide tube 5. The yarn guide tube 5 is provided in multiple configurations, and a locking end 51 is provided on the yarn guide tube 5, which is fixed to the magnetic elimination device as a whole through the locking end 51. The magnetic elimination device is a plate-like structure, and this magnetic elimination plate 4 is horizontally fixed to the lower part of the yarn guide tube 5. The static electricity generated by the fiber after passing through the yarn guide tube 5 is eliminated by the magnetic elimination plate 4.

[0026] In order to make the fibers pass more smoothly, the yarn guide tube 5 further comprises a vertical section 52 and an arc section 53, and the fibers pass through the yarn guide tube 5 in a non-friction state.

[0027] The lower part of the yarn guide tube 5 is provided with one or more heating yarn winding rollers 3. In this embodiment, the heating yarn winding rollers 3 are provided in three groups, and the yarn moves in an S state when passing through. The heating yarn winding rollers 3 are provided with yarn running grooves 31, and the heating yarn winding rollers 3 are provided with heating devices 32 inside. Such heating can be heating by heat transfer oil or electric heating, and the heating yarn winding rollers 3 are heated by such heating devices. When the fiber passes through, it moves in an S shape during the heating process.

[0028] A cutting table 6 is arranged on the rear side of the heated yarn winding roller 3, and an extrusion conveying roller and a cutting roller 7 are arranged on the cutting table 6. A top adjustment groove 62 is arranged on the top crossbeam 61 of the cutting table 6, and a vertical driving cylinder 63 is arranged inside the top adjustment groove 62. An upper driving roller 8 is arranged on the bottom driving end of the vertical driving cylinder 63, and a lower driving roller 9 is arranged in the cutting table 6 corresponding to the upper driving roller 8 to cooperate with the upper driving roller 8 to realize extrusion conveying; a cutting roller 7 is arranged on the side of the lower driving roller 9.

[0029] Furthermore, in order to improve the adjustment efficiency, the cutting roller 7 is fixed on the cutting table 6, and a lateral adjustment groove is provided corresponding to the cutting table 6. The lateral adjustment groove includes an upper adjustment groove 64 and a side adjustment groove 65. The upper adjustment groove 64 and the side adjustment groove 65 are arranged in communication with each other, and a tool adjuster 66 is provided in the upper adjustment groove 64 and the side adjustment groove 65. The cutting length of the cutting roller 7 on the cutting table 6 can be adjusted by the tool adjuster 66.

[0030] In this embodiment, the knife distance regulator 66 has 4 gears, and the gears are adjusted by a rotating wheel. The gears are respectively 12.7 mm (0.5 inches), 25.4 mm (1 inch), 38.1 mm (1.5 inches), and 50.8 mm (2 inches) in yarn cutting length.

[0031] When the utility model is in operation, the fiber yarn roller is placed on the external tray, and the fiber yarn head passes through the yarn sensor 2, the yarn guide tube 5, and the magnetic elimination plate 4. The fiber yarn bundle passing through the magnetic elimination plate 4 is wound through the yarn groove 31 of the heated yarn winding roller 3, passes through the three heated yarn winding rollers 3 in an S shape, and is introduced between the lower driving roller 9 and the upper driving roller 8. The vertical driving cylinder 63 is turned on, and the lower driving roller 9 and the upper driving roller 8 are pressed tightly, and production can be carried out at this time.

[0032] Under normal production conditions, the yarn sensor 2 can detect the continuity of the yarn feeding. When the lower driving roller 9 and the upper driving roller 8 slip with the fiber bundle, the fiber bundle no longer feeds the yarn, and the yarn sensor 2 alarms, so that the worker can connect the yarn in time.

[0033] Because the magnetic force elimination plate 4 can eliminate the friction between the fiber yarn and the yarn guide tube 5, the flying yarn phenomenon can be reduced to the greatest extent.

[0034] The utility model adopts three groups of heated winding rollers 3 to configure the yarn running groove 31, which can prevent the fiber yarn bundles from being entangled with each other, so that the subsequent yarn running between the lower driving roller 9 and the upper driving roller 8 and the yarn cutting of the cutting roller 7 are more evenly distributed, thereby improving the stability of the fiber yarn distribution.

[0035] The utility model heats the three groups of heated yarn winding rollers 3 at a heating temperature of 25-30°C. After the fiber yarn is heated, the activity of the sizing agent on the surface is improved. The temperature of the resin paste is generally 35-40°C. By heating the fiber yarn, the temperature difference between the resin paste and the fiber yarn is reduced. In this state, the fiber yarn and the resin paste have better wettability.

[0036] The utility model can effectively detect the yarn passing state through the yarn sensor 2, the magnetic elimination plate 4, the heated yarn winding roller 3 and the knife distance regulator 66, so as to avoid the unstable fiber yarn content during production, promote the production without flying yarn, and make the fiber yarn and the resin paste more excellently impregnated. At the same time, the fiber length is convenient to adjust. The utility model can greatly improve the production quality and efficiency of SMC sheets and make the production more stable and controllable.

Claims

1. A SMC sheet machine cutting system, characterized by: It includes a frame, on which a yarn sensor is arranged, a yarn guide tube is arranged on the rear side of the yarn sensor, a magnetic elimination device is arranged in conjunction with the yarn guide tube, one or more heated yarn winding rollers are arranged at the lower part of the yarn guide tube, a cutting table is arranged on the rear side of the heated yarn winding roller, and an extrusion conveying roller and a cutting roller are arranged on the cutting table; a lateral adjustment groove is arranged on the cutting table, and a tool adjuster is arranged in the lateral adjustment groove, and the cutting length of the cutting roller on the cutting table can be adjusted by the tool adjuster.

2. The SMC sheet machine cutting system according to claim 1, characterized in that: The yarn sensor is fixed on the front side of the frame, and comprises an insertion tube and a yarn passing sensor fixed on the insertion tube.

3. The SMC sheet machine cutting system according to claim 1, characterized in that: The heated yarn winding roller is provided with a yarn running groove, and a heating device is provided inside the heated yarn winding roller.

4. The SMC sheet machine cutting system according to claim 1, characterized in that: A top adjustment groove is arranged on the top crossbeam of the cutting table, a vertical driving cylinder is arranged inside the top adjustment groove, an upper driving roller is arranged on the bottom driving end of the vertical driving cylinder, and a lower driving roller is arranged inside the cutting table corresponding to the upper driving roller to cooperate with the upper driving roller to realize extrusion and conveying; a cutting roller is arranged on the side of the lower driving roller.

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