Hot cutting process for laminated fabric

Abstract

The hot cutting process comprises the following steps that the position of a hot cutter is adjusted, specifically, a sensor detects the selvedge condition in real time and sends selvedge data to a control system, and the control system controls the position of the hot cutter on a rack to be adjusted according to the selvedge data; the control system controls the running speed of the roller; temperature signals of the hot cutter are sent to a control system through a temperature sensor, the control system controls a contactor to act, and therefore power-on and power-off of an electric heating wire in the hot cutter are controlled; a pressure signal of the hot cutter is transmitted to the control system through the air pump, and the control system controls downward cutting of the hot cutter and resetting of the hot cutter according to the pressure signal. According to the automatic edge cutting device, edge cutting is automatically controlled, high efficiency and convenience are achieved, the edge cutting position accuracy is improved, and unnecessary cutting damage is reduced. The hot cutter is simple in structure, free of burrs after edge cutting and almost free of batting during cutting, and meanwhile the utilization rate of the hot cutter is increased.

Description

Technical Field

[0001] The invention relates to a hot cutting process for bonding fabrics. Background Art

[0002] Bonding is an important process in the textile and manufacturing industries. It involves bonding different materials (such as fabrics, films, glues, etc.) together through a specific method to form a whole. Common bonding methods: 1. Fabric bonding refers to bonding fabrics of different fabrics together to form a whole. This bonding method is widely used in the fields of clothing manufacturing, shoe and hat manufacturing, household goods, and automotive interiors. 2. Cloth-to-film bonding refers to bonding fabrics to thin films or waterproof and breathable films in a specific way. This bonding method is particularly common in clothing manufacturing and is used to make waterproof and breathable clothing such as windbreakers and snowsuits.

[0003] There are many kinds of fabric base materials, each with its own characteristics, suitable for different garments and uses; at the same time, there are also multiple categories of membrane materials and base fabric materials. Therefore, due to the different uses and demand areas, the base fabric materials, membrane materials, and base fabric materials that are bonded can have various combinations. The diverse bonding often causes inconsistencies in the width of the base fabric material and the membrane material, and the base fabric material and the base fabric material. These inconsistencies often lead to a series of problems such as uneven thickness of the edge of the cloth, abnormal curling, adhesive transfer, downtime, and poor appearance quality. In actual production, it is often necessary to cut the edge of the cloth.

[0004] The existing lamination process uses a cold cutting process, which has the following shortcomings: 1. The blade wears out quickly and needs to be replaced about once a week, resulting in high consumable costs; 2. Simple mechanical shearing will produce abnormalities such as burrs and fluff, resulting in poor fabric appearance; 3. Due to its light weight, the fluff is easily affected by static electricity and cannot be completely adsorbed onto the fabric or removed by a suction pump. It will float into the air like dust, causing pollution to the production environment; 4. Due to the different materials of the fabric, membrane, and base fabric, it is often impossible to accurately assess the service life of the cold cutting knife, resulting in an increase in the B-level rate of finished products such as shutdowns and fluff sticking to the fabric.

[0005] In summary, it is necessary to design a cutting process for laminated fabrics to better achieve the trimming of laminated fabrics to meet the market's higher requirements for fabric lamination. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a heat cutting process for laminated fabrics, which can accurately and efficiently cut the edges of laminated fabrics to make the fabrics have zero burrs and no lint.

[0007] To achieve the above object, the technical solution adopted by the present invention is a hot cutting process for bonding fabrics, comprising the following steps:

[0008] Hot cutter position adjustment: The sensor detects the cloth edge in real time and sends the cloth edge data to the control system. The control system adjusts the position of the hot cutter on the frame according to the cloth edge data.

[0009] Roller adjustment: The control system controls the running speed of the roller;

[0010] Heat cutter temperature adjustment: The temperature sensor sends the temperature signal of the heat cutter to the control system, and the control system controls the contactor to control the on and off of the heating wire in the heat cutter; and

[0011] Hot knife cutting: The pressure signal of the hot knife is transmitted to the control system through the air pump, and the control system controls the downward cutting and resetting of the hot knife according to the pressure signal.

[0012] In one embodiment of the present invention, in the hot cutter position adjustment process, the control system controls the rotation of the first motor, drives the positioning screw to rotate through the first motor, and further drives the hot cutter fixing frame installed on the positioning screw to move left and right, and an air pump is fixedly installed on the hot cutter fixing frame, and the hot cutter is installed on the air pump. The air pump and the hot cutter are driven and connected. One end of the air pump is connected to the hot cutter base, and the hot cutter base is provided with a fixing groove, and the hot cutter is movably installed on the fixing groove.

[0013] In one embodiment of the present invention, the air pump pressure is 0-1MPa, and the temperature of the hot cutter is set to 250-380°C. Different fabric base materials have different thicknesses, and the strength of the materials to be cut also has deviations, requiring different pressure adjustments. Reduce the probability of poor hot cutting effects, and at the same time reduce damage to the hot cutter and the rollers below. The temperature is adjusted by pressure sensing, wear marks of the rollers below the hot cutter, thickness and strength of the fabric, and the burrs after cutting. Accurate temperature control can achieve more accurate and efficient cutting effects, and make the fabric zero burrs and no lint.

[0014] In one embodiment of the present invention, the first motor drives the positioning screw to rotate via a bevel gear.

[0015] In one embodiment of the present invention, during the hot knife cutting process, the control system controls the air pump to push the hot knife downward until the hot knife is pressed down to the roller surface, thereby cutting off the edge material of the bonding fabric on the roller surface.

[0016] In one embodiment of the present invention, in the hot knife cutting process, after the edge material cutting is completed, the air pump is reset, thereby driving the hot knife to reset.

[0017] In one embodiment of the present invention, in the preparation process of the roller, the control system controls the rotation of the second motor, and the second motor drives the roller to rotate. The roller cooperates with the hot cutting knife, and the rotation speed of the roller is 10-40m / min. The roller needs to use high-hardness chromium-molybdenum steel and add hard chrome plating on the surface to make its hardness HRC about 55°, plus or minus 3°. The second motor adjusts the rotation speed of the roller to reach 105%-125% of the bonding speed, and adjusts different speeds according to different hot cutting materials.

[0018] In one embodiment of the present invention, waste cleaning is also included: the control system controls the blower to blow air to the air duct, so as to blow away the waste falling into the drop opening of the air duct.

[0019] In one embodiment of the present invention, a manual adjustment system is also included, which adjusts the rotation of the positioning screw through a handle, thereby driving the hot cutter fixing frame installed on the positioning screw to move left and right, and an air pump is fixedly installed on the hot cutter fixing frame, and the hot cutter is fixedly installed on one end of the air pump.

[0020] In one embodiment of the present invention, the bonding fabric comprises at least two or more fabrics bonded together.

[0021] This technical solution has the following beneficial effects:

[0022] The invention is efficient and convenient by automatically controlling the cutting of edge materials, improving the accuracy of the cutting position and reducing unnecessary cutting losses. After the edge of the laminated fabric is cut, there is no burr, which reduces the degradation rate of the laminated finished product. At the same time, there is almost no lint during cutting with the hot cutting process, which reduces the dust in the laminating environment, reduces the abnormal processing rate due to lint sticking to the fabric surface, and at the same time improves the safety and friendliness of the employees' working environment.

[0023] In addition, the hot cutting process improves the utilization rate of the hot cutting knife. After heat treatment of the cutter, the cutting edge quality is improved, the wear of the tool is reduced, the frequency of material replacement due to wear of the cutter and roller is reduced, and the cost of consumables is reduced.

[0024] Furthermore, by combining it with manual control, it can cope with the bonding of various materials, with a wider range of applications and greater practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 is a top view of an embodiment of the present invention;

[0027] Figure 3 is a side view of an embodiment of the present invention;

[0028] Figure 4is a schematic diagram of the structure of a hot cutting knife in one embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of a partial structure of an embodiment of the present invention.

[0030] Explanation of the reference numerals: 1. Frame; 2. Hot cutter base; 3. Bevel gear; 4. Screw bracket one; 5. Hot cutter fixing bracket; 6. Air pump; 7. Screw bracket two; 8. Positioning screw; 9. Guide rail; 10. Touch screen; 11. Support roller; 12. Air duct; 13. Blower; 14. Second motor; 15. Air duct bracket; 16. Hot cutter; 17. Fixing groove; 18. Rotating shaft fixing device; 19. Motor fixing device; 20. First motor. DETAILED DESCRIPTION

[0031] Below is a combination of the embodiments and the attached Figures 1 to 5 The present invention is further described.

[0032] A hot cutting device suitable for laminating fabrics, comprising a frame 1, a first motor 20, a positioning screw 8, an air pump 6, a hot cutting knife fixing frame 5, a hot cutting knife 16, a second motor 14 and a supporting roller 11, wherein the positioning screw 8 is transmission-connected to the motor, and the positioning screw 8 is movably mounted on the frame 1, that is, the positioning screw 8 is threadedly connected to the frame 1. In order to enhance the stability of the positioning screw 8, a screw bracket is provided on the frame 1, and the screw bracket is fixedly connected to the frame 1, and the positioning screw 8 is passed through the screw bracket. There are two positioning screws 8, namely a first screw and a second screw, and the first screw and the second screw are relatively mounted on the frame 1. Specifically, the first screw is mounted on the screw bracket 1 4, and the second screw is mounted on the screw bracket 2 7.

[0033] The air pump 6 is fixedly mounted on the hot cutter fixing frame 5, and a hot cutter base 2 is fixedly mounted on one end of the air pump 6. A fixing groove 17 is provided on the hot cutter base 2, and the hot cutter 16 is detachably fixedly mounted in the fixing groove 17. One end of the hot cutter fixing frame 5 is fixedly mounted on the positioning screw 8, and the first screw and the second screw are both provided with the hot cutter fixing frame 5. The frame 1 is provided with a guide rail 9, and the guide rail is fixedly mounted on the frame 1 along the length direction of the positioning screw 8. The hot cutter fixing frame 5 is movably mounted on the guide rail 9 and can slide left and right on the guide rail 9.

[0034] The second motor 14 is drivingly connected to the support roller, which is rotatably mounted on the frame 1 and is located below the hot cutter. The hot cutter has a built-in thermoelectric wire that generates heat when powered. The laminated fabric is located on the support roller 11, and the hot cutter cuts the laminated fabric downward, and the laminated fabric is cut off under the reaction force of the support roller. In this embodiment, the support roller 11 is a roller.

[0035] In this embodiment, the first motor 20 is connected to the positioning screw 8 via a bevel gear transmission, and the bevel gear includes a first bevel gear 3 and a second bevel gear. The first bevel gear 3 is connected to the transmission shaft of the first motor 20, and the second bevel gear is connected to the first bevel gear. Specifically, the first motor 20 is fixedly mounted on the frame 1 via a motor fixing device 19, and the first bevel gear 3 is rotatably mounted on the frame 1 via a rotating shaft fixing device 18.

[0036] Furthermore, it also includes a blower mechanism, which includes an air duct bracket 15, a blower 13 and an air duct 12, one end of the air duct 12 is connected to the blower, the air duct 12 is fixedly mounted on the hot cutter fixing frame 5 through the air duct bracket 15, and the air duct bracket 15 and the air duct 12 are fixedly connected. A blanking port is opened on the air duct 12, and the blanking port is located below the hot cutter 16.

[0037] Furthermore, a control system is included, and the first motor 20, the second motor 14, the air pump 6 and the hot cutter are all connected to the control system. Under the control of the control system, the hot cutter can be powered on and off to achieve the heating function of the hot cutter; the working conditions of the first motor 20 and the air pump 6 are controlled.

[0038] When in use, the fabric edge parameters are automatically controlled according to the fabric edge conditions. In case of special fabric edge conditions (a. The laminating film is too thin and the sensor cannot sense it; b. The width deviation of the base fabric and the composite material is too large, and the automatic adjustment setting fails to cut the two products at the same time; c. The needle conditions on the left and right sides of the base fabric are inconsistent, etc.), combined with the hot cutter up and down system, manual adjustment is changed, and the adjusted parameters are set as automatic parameters through the touch screen 10, and fed back to the control system, and the hot cutter temperature is set. The control system controls the hot cutter to heat up. When the temperature setting value of the hot cutter is equivalent to the actual value, the hot cutter pressure parameters, that is, the parameters of the air pump 6, are set according to the proofing situation or past experience to control the up and down movement of the hot cutter. After the trimming is completed, the control system will control the blower mechanism to transfer and collect the waste.

[0039] A hot cutting process for bonding fabrics, the control system mainly includes the following aspects, wherein the control system is implemented by a PLC module:

[0040] Hot knife temperature control system:

[0041] 1. The temperature sensor transmits the temperature signal of the cutter to the PLC, and the PLC controls the start and stop of the cutter heating.

[0042] 2. The touch screen displays the set value and actual value of the temperature. The set value can be adjusted according to actual needs.

[0043] 3. PLC controls the contactor action, controls the on and off of the cutter heating tube, and realizes the heating function of the cutter.

[0044] Selvedge system:

[0045] 1. Automatic: The sensor detects the cloth edge in real time and feeds the information back to the PLC, which controls the cutter to move left and right.

[0046] 2. Manual: Press the left and right inching button on the touch screen to realize the inching control of the cutter's left and right movement.

[0047] 3. Click the manual / automatic switch button on the touch screen to select the cutter action mode according to the actual situation.

[0048] 4. PLC controls the contactor action, controls the forward and reverse rotation of the motor, and realizes the left and right movement of the cutter.

[0049] Roller transmission system:

[0050] 1: There is a manual / automatic switch button on the touch screen. In automatic mode, the transmission roller and the equipment operate in conjunction. In manual mode, the transmission roller operates independently.

[0051] 2: Select the manual speed option on the touch screen, and you can set the manual transmission speed within the upper and lower limits.

[0052] 3: There is an automatic speed compensation option on the touch screen, and the compensation value of the automatic transmission speed can be set arbitrarily within the upper and lower limits.

[0053] 4: The transmission is controlled by PLC to control the operation and speed signal of the inverter, and the inverter controls the motor to drive the roller to run.

[0054] Waste Blowing System:

[0055] 1. Add a manual / automatic switch button on the touch screen for manual control. Automatic control is based on equipment linkage. The control method is PLC control of the contactor. The contactor control is power frequency operation, and the air volume does not need to be adjusted.

[0056] Hot cutting knife up and down motion control system:

[0057] An air pump transmits the pressure signal of the cutter to the PLC, which controls the start and stop of the cutter movement.

[0058] The touch screen displays the set value and actual value of the pressure, and the set value can be adjusted according to actual needs.

[0059] PLC controls the contactor action and controls the air pump to apply pressure, thus achieving pressure control of the cutter.

[0060] The specific steps of the hot cutting process are as follows:

[0061] 1. Turn on the PLC control contactor.

[0062] 2. Adjust the selvedge system, automatically adjust, and automatically control the selvedge parameters according to the selvedge conditions. In case of special selvedge conditions (a. The laminating film is too thin and the sensor cannot sense it; b. The width deviation of the base fabric and the composite material is too large, and the automatic adjustment setting cannot cut the two products at the same time; c. The needle conditions on the left and right sides of the base fabric are inconsistent, etc.), combined with the upper and lower systems of the hot cutter, change to manual adjustment, set the adjusted parameters to automatic parameters, and then switch to automatic.

[0063] 3. According to the proofing situation or past experience, turn on the temperature control system, set the hot cutter temperature, and control the heating of the hot cutter.

[0064] 4. When the temperature setting value of the cutter is equivalent to the actual value, set the manual speed and automatic compensation speed of the transmission system according to the proofing situation or past experience, set the hot cutter pressure parameters, and simultaneously start the transmission system, suction device and hot cutter up and down control system.

[0065] 5. After the trimming is completed, the transmission system, the blowing device, and the upper and lower control systems of the hot cutting knife are stopped synchronously, and the heating power supply of the temperature control system is cut off.

[0066] 6. When the actual value of the temperature control system is close to the ambient temperature, close the PLC control contactor.

[0067] This process method is used to trim the specific laminated fabrics:

[0068] Example 1

[0069] The bonding material and conditions in this example are 20D nylon fabric bonded with 0.015mm printed PU transparent film. The width of the base fabric is 145cm, the width of the PU film is 152cm, the bonding speed is 12m / min, and the customer's required width is 138cm.

[0070] When using the hot cutting device, since the base fabric and the membrane are both relatively thin and transparent, and the width is not consistent, manual positioning is required, and the positioning is 0.5cm within the pinhole of the edge of the fabric. It should be noted that the fabric needs to be shaped to control the width shrinkage before lamination, and there will be pinholes on the edge of the fabric, which is a damage to the fabric and is often not recognized as an effective fabric.

[0071] Further, the hot cutting temperature was set to 280°C.

[0072] Further, the air pump pressure is 0.15 MPa.

[0073] Further, the roller speed is 14 m / min.

[0074] Finally, a double-layer finished fabric made of a thin nylon laminated membrane material with a width of 140 cm and no burrs on both sides can be obtained, which is used for single-punch jackets in spring and autumn.

[0075] Example 2

[0076] The bonding material and conditions in this example are 75D polyester fabric bonded with 0.018mm PTFE transparent film. The width of the base fabric is 152cm, the width of the PTFE film is 160cm, the bonding speed is 30m / min, and the customer's required width is 145cm.

[0077] When using the hot cutting device, since the membrane material is conventional polyester and the rigidity is not strong, the cutting position can be positioned by computer control.

[0078] Further, the hot cutting temperature was set to 300°C.

[0079] Further, the air pump pressure is 0.2 MPa.

[0080] Further, the roller speed is 34 m / min.

[0081] The final product is a double-layer finished fabric with a width of 146 cm and no burrs on both sides and high physical properties, which can be used for jackets or ski suits.

[0082] Example 3

[0083] The bonding material and conditions in this example are 75D polyester stretch fabric bonded to 160g / m2 polar fleece. The width of the base fabric is 149cm, the width of the polar fleece is 152cm, the bonding speed is 15m / min, and the customer's required width is 145cm.

[0084] When using the hot cutting device, because it is made of polyester stretch material and the fitted polar grain is thick, the cutting position can be located by computer control.

[0085] Further, the hot cutting temperature was set to 350°C.

[0086] Further, the air pump pressure is 0.25 MPa.

[0087] Further, the roller speed is 18 m / min.

[0088] Finally, a double-layer finished autumn and winter fabric with a width of 144 cm and no raw edges on both sides can be produced, which is used for trousers.

[0089] Example 4

[0090] The bonding material and conditions in this example are 50D polyester high-elastic fabric that has been laminated with 0.02mm TPU white film, and needs to be laminated with 30D polyester single-sided cloth. The width of the base cloth itself is 152cm, the width of the TPU film is 155cm, the width of the single-sided cloth is 152cm, the bonding speed is 10m / min, and the customer's required width is 145cm.

[0091] When the hot cutting device is used, the laminating film is made of polyester high elastic material and the laminating film is white film, so the cutting position can be positioned by computer control.

[0092] Further the hot cutting temperature was set to 330°C.

[0093] Further, the air pump pressure is 0.2 MPa.

[0094] Further, the roller speed is 12 m / min.

[0095] Finally, a three-layer finished fabric with a width of 146 cm and no burrs on both sides can be obtained, which can be used for three-piece down jackets in autumn and winter.

[0096] The above specific embodiments are only used to illustrate the present invention rather than to limit the present invention. Any changes and substitutions made to the present invention without creative work within the scope of protection of the present invention and the claims shall fall within the scope of protection of the patent of the present invention.

Claims

1. A hot cutting process for laminating fabrics, characterized in that: The following steps are involved: Hot cutter position adjustment: The sensor detects the cloth edge in real time and sends the cloth edge data to the control system. The control system adjusts the position of the hot cutter on the frame according to the cloth edge data. Roller adjustment: The control system controls the running speed of the roller; Hot cutter temperature adjustment: The temperature sensor sends the temperature signal of the hot cutter to the control system, and the control system controls the contactor to control the on and off of the heating wire in the hot cutter; as well as Hot knife cutting: The pressure signal of the hot knife is transmitted to the control system through the air pump, and the control system controls the downward cutting and resetting of the hot knife according to the pressure signal.

2. The hot cutting process for bonding fabrics according to claim 1, characterized in that: In the hot cutter position adjustment process, the control system controls the rotation of the first motor, which drives the positioning screw to rotate, and further drives the hot cutter fixing frame installed on the positioning screw to move left and right. An air pump is fixedly installed on the hot cutter fixing frame, and the hot cutter is installed on the air pump.

3. The hot cutting process for bonding fabrics according to claim 2, characterized in that: The air pump pressure is 0-1 MPa, and the temperature of the hot cutter is set to 250-380°C.

4. The hot cutting process for bonding fabrics according to claim 1, characterized in that: In the hot knife cutting process, the control system controls the air pump to push the hot knife downward until the hot knife is pressed down to the roller surface, and the edge material of the bonding fabric on the roller surface is cut off.

5. The hot cutting process for bonding fabrics according to claim 4, characterized in that: In the hot knife cutting process, after the edge material cutting is completed, the air pump is reset, thereby driving the hot knife to reset.

6. The hot cutting process for bonding fabrics according to claim 1, characterized in that: In the roller preparation process, the control system controls the rotation of the second motor, and the second motor drives the roller to rotate. The roller cooperates with the hot cutter, and the rotation speed of the roller is 10-40m / min.

7. The hot cutting process for bonding fabrics according to claim 1, characterized in that: It also includes waste cleaning: the control system controls the blower to blow air to the air duct, thereby blowing away the waste that falls into the drop opening of the air duct.

8. The hot cutting process for bonding fabrics according to any one of claims 1 to 7, characterized in that: It also includes a manual adjustment system, which drives the hot cutter fixing frame installed on the positioning screws to move left and right by adjusting the rotation of the left and right positioning screws respectively. An air pump is fixedly installed on the hot cutter fixing frame, and a hot cutter is fixedly installed on one end of the air pump.

9. The hot cutting process for bonding fabrics according to claim 8, characterized in that: The bonding fabric comprises at least two or more fabrics bonded together.

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