Glue-free bonding machine and method of using the same

Abstract

The invention discloses a non-glue bonding machine and a use method thereof, belonging to the technical field of pearl cotton bonding. The non-glue bonding machine comprises: a frame, a conveyor belt is arranged on the frame along the front-to-back direction, a driving member is connected to the conveyor belt transmission, a positioning structure is evenly distributed on the conveyor belt along the front-to-back direction, two pieces of pearl cotton to be bonded are stacked up and down in the positioning structure; two grabbing mechanisms, both of which are arranged on the frame; a heating mechanism, the heating mechanism is arranged on the frame so as to be movable up and down, the heating mechanism is connected to the frame through a spring, the heating mechanism is located above the conveyor belt, a suction cup member grabs the upper layer of pearl cotton, and moves to the top of the heating mechanism under the driving of the front-to-back moving members, the upper and lower lifting members drive the suction cup member to press down, so that the lower end of the upper layer of pearl cotton contacts with the upper surface of the heating mechanism, and the heating mechanism is pressed down so that the upper end of the lower layer of pearl cotton contacts with the lower surface of the heating mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of pearl cotton bonding, in particular to a glue-free bonding machine and a use method thereof. Background Art

[0002] Pearl cotton, also known as foam cotton or bubble cotton, is a lightweight, soft and elastic packaging material. It is usually made of materials such as polyethylene or polypropylene, and is processed to form a series of closed bubble structures. These bubbles can provide good cushioning and protection properties and are often used to package fragile items to prevent damage during transportation and storage.

[0003] At present, pearl cotton is usually bonded and combined by a glue-free thermal bonding machine to form a packaging piece of a specific shape. The existing glue-free thermal bonding machine usually heats the pearl cotton and then presses the heated pearl cotton onto other pearl cotton for thermal bonding. However, the existing glue-free thermal bonding machine has low processing efficiency, requires a lot of time and energy for heating, and has poor economic benefits. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a glue-free bonding machine and a method of using the same, which can improve the efficiency of thermal bonding of pearl cotton and reduce the energy consumption of the thermal bonding process.

[0005] According to the first embodiment of the present invention, the glue-free bonding machine includes: a frame, a conveyor belt is arranged on the frame along the front-to-back direction, the conveyor belt is connected to the driving member, and the conveyor belt is evenly distributed with positioning structures along the front-to-back direction. Two pieces of pearl cotton to be bonded are stacked up and down in the positioning structure; two grasping mechanisms, both grasping mechanisms are arranged on the frame, and each grasping mechanism includes a front-to-back moving member, an up-and-down lifting member and a suction cup member, the front-to-back moving member is arranged at the upper end of the frame, the up-and-down lifting member is arranged at the lower end of the front-to-back moving member, the suction cup member is arranged at the lower end of the front-to-back moving member, and the suction cup member faces It is arranged on the conveyor belt, and the suction cup part grabs the upper layer of pearl cotton through the driving of the upper and lower lifting parts to separate the upper and lower pearl cotton; the heating mechanism is arranged on the frame so as to be movable up and down, and the heating mechanism is connected to the frame through a spring, and the heating mechanism is located above the conveyor belt. The suction cup part grabs the upper layer of pearl cotton and moves to the top of the heating mechanism under the driving of the front and rear moving parts. The upper and lower lifting parts drive the suction cup part to press down, so that the lower end of the upper layer of pearl cotton contacts with the upper surface of the heating mechanism, and the heating mechanism is pressed down so that the upper end of the lower layer of pearl cotton contacts with the lower surface of the heating mechanism.

[0006] The glueless bonding machine according to the first embodiment of the present invention has at least the following beneficial effects: by arranging a heating mechanism on the conveyor belt, two pieces of pearl cotton are simultaneously brought into contact with the heating mechanism for heating through a grabbing mechanism, thereby shortening the time required for heating the pearl cotton, improving production efficiency, and improving the energy utilization efficiency of the heat source of the heating mechanism. Using two grabbing assemblies to alternately grab the pearl cotton on the conveyor belt for thermal bonding further improves production efficiency, while reducing the time of the heating mechanism running idle, thereby further improving energy utilization efficiency.

[0007] According to some embodiments of the present invention, the heating mechanism includes two layers of heating plates stacked in the up-and-down direction, each heating plate includes a plurality of heating rollers, the axis of the heating rollers is arranged in the left-right direction, and the plurality of heating rollers are arranged in the front-to-back direction.

[0008] According to some embodiments of the present invention, the heating rollers are all electrically heated rollers.

[0009] According to some embodiments of the present invention, the heating rollers are all water-heated rollers.

[0010] According to some embodiments of the present invention, the plurality of water heating rollers are connected in sequence from the front to the back, and the hot water flows through each of the water heating rollers in sequence from the rearmost water heating roller to the front.

[0011] According to some embodiments of the present invention, the water heating roller includes: a fixed shaft, on which a water inlet pipeline and a drain pipeline are arranged; an inner roller body, which is fixed on the fixed shaft; an outer roller body, in which an outer roller is rotatably arranged on the fixed shaft, and the outer roller is sleeved on the fixed shaft, and the outer roller and the inner roller form a hollow cylindrical water flow channel, and the two ends of the water flow channel are respectively connected to the water inlet pipeline and the drain pipeline.

[0012] According to some embodiments of the present invention, spiral blades are provided inside the outer roller, and the rotation of the outer roller drives the spiral blades to rotate, driving the water in the water flow channel to flow from the water inlet pipe to the drainage pipe.

[0013] According to some embodiments of the present invention, the up and down lifting members are hydraulic cylinders arranged along the up and down directions.

[0014] According to a method for using a glueless bonding machine according to an embodiment of a second aspect of the present invention, wherein the glueless bonding machine is the glueless bonding machine of an embodiment of the first aspect of the present invention, the method for using comprises:

[0015] Step 1: Place the two pieces of pearl cotton to be bonded on top of each other in the positioning structure at the front end of the conveyor belt;

[0016] Step 2: The conveyor belt transports the two pieces of pearl cotton backward to the bottom of the grabbing mechanism, and the upper and lower lifting parts drive the suction cup parts to move downward to grab the upper layer of pearl cotton;

[0017] Step 3: The front and rear moving parts move backward synchronously with the conveyor belt, the conveyor belt moves the lower layer of pearl cotton to the bottom of the heating mechanism, the front and rear moving parts move the upper layer of pearl cotton to the heating mechanism, and the upper and lower lifting parts descend to press the upper layer of pearl cotton and the heating mechanism downward, so that the lower end of the upper layer of pearl cotton contacts the upper surface of the heating mechanism, and the upper end of the lower layer of pearl cotton contacts the lower surface of the heating mechanism;

[0018] Step 4: The upper and lower lifting parts keep in the downward pressing state, while the front and rear moving parts continue to move backward synchronously with the conveyor belt. After the upper and lower layers of pearl cotton move backward out of the range of the heating mechanism, the upper and lower lifting parts press the upper and lower layers of pearl cotton together.

[0019] According to some embodiments of the present invention, in step 4, the backward movement of the upper layer of pearl cotton and the lower layer of pearl cotton drives the outer roller body of the water heating roller to rotate, and the rotation of the outer roller body drives the spiral blades to rotate, driving the hot water to flow from the water inlet pipe to the drainage pipe in the water flow channel.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 is a schematic structural diagram of a glue-free bonding machine according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 The main view of

[0024] Figure 3 yes Figure 1 A top view of

[0025] Figure 4 yes Figure 1 Left side sectional view of

[0026] Figure 5 is a schematic diagram of step 2 in the method for using the glue-free bonding machine according to an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of step 3 in the method for using the glue-free bonding machine according to an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of step 4 in the method for using the glue-free bonding machine according to an embodiment of the present invention;

[0029] Figure 8 yes Figure 4 Schematic diagram of the internal structure of the heating roller.

[0030] Reference numerals:

[0031] Frame 100; conveyor belt 110; driving member 120; positioning structure 130; lifting member 140;

[0032] Grasping mechanism 200; forward and backward moving member 210; up and down lifting member 220; suction cup member 230;

[0033] Heating mechanism 300; heating plate 310; heating roller 320; fixed shaft 330; water inlet pipeline 331; drainage pipeline 332; inner roller body 340; outer roller body 350; water flow channel 360; spiral blade 370;

[0034] The upper layer of pearl cotton is 1; the lower layer of pearl cotton is 2. DETAILED DESCRIPTION

[0035] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] refer to Figures 1 to 8 An adhesive-free bonding machine and a method of using the same according to an embodiment of the present invention are described.

[0040] like Figures 1 to 8As shown, the adhesive-free bonding machine according to the embodiment of the present invention includes: a frame 100, a conveyor belt 110 is arranged on the frame 100 along the front-to-back direction, the conveyor belt 110 is transmission-connected with a driving member 120, and a positioning structure 130 is evenly distributed on the conveyor belt 110 along the front-to-back direction, and two pieces of pearl cotton to be bonded are stacked up and down in the positioning structure 130; two grasping mechanisms 200, both of which are arranged on the frame 100, and each grasping mechanism 200 includes a front-to-back moving member 210, an up-and-down lifting member 220 and a suction cup member 230, the front-to-back moving member 210 is arranged at the upper end of the frame 100, the up-and-down lifting member 220 is arranged at the lower end of the front-to-back moving member 210, the suction cup member 230 is arranged at the lower end of the front-to-back moving member 210, and the suction cup member 230 is arranged toward the conveyor belt 110, and through the driving of the up and down lifting parts 220, the suction cup part 230 grabs the upper layer of the pearl cotton to separate the upper and lower pieces of the pearl cotton; the heating mechanism 300, the heating mechanism 300 is arranged on the frame 100 so as to be movable up and down, the heating mechanism 300 is connected to the frame 100 through a spring, the heating mechanism 300 is located above the conveyor belt 110, the suction cup part 230 grabs the upper layer of the pearl cotton 1, and moves to the top of the heating mechanism 300 under the driving of the front and rear moving parts 210, the up and down lifting parts 220 drive the suction cup part 230 to press down, so that the lower end of the upper layer of the pearl cotton 1 contacts the upper surface of the heating mechanism 300, and the heating mechanism 300 is pressed down so that the upper end of the lower layer of the pearl cotton 2 contacts the lower surface of the heating mechanism 300.

[0041] like Figures 1 to 3 As shown, the conveyor belt 110 is arranged on the frame 100 along the front-to-back direction, and the conveyor belt 110 is evenly distributed with positioning structures 130 along the front-to-back direction. The positioning structure 130 is a protruding structure arranged according to the outer contour of the pearl cotton to be bonded. The two pieces of pearl cotton to be bonded are stacked up and down in the positioning structure 130. The positioning structure 130 can ensure the accurate position of the pearl cotton during the bonding process. The driving member 120 is arranged at the rear end of the conveyor belt 110. The driving member 120 drives the conveyor belt 110 to operate, and drives the pearl cotton on the conveyor belt 110 to move from front to back.

[0042] like Figures 1 to 8As shown, two grabbing mechanisms 200 are arranged side by side, and the two grabbing mechanisms 200 alternately grab the upper layer of pearl cotton 1 stacked on the conveyor belt 110 for heating and pressing, thereby realizing a continuous pearl cotton thermal bonding process. The upper and lower lifting members 220 cooperate with the suction cup member 230 to complete the grabbing, heating and pressing of the upper layer of pearl cotton 1. After the suction cup member 230 grabs the upper layer of pearl cotton 1, the front and rear moving members 210 move backward synchronously with the conveyor belt 110 to ensure that the position of the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 are accurately bonded. After the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 are pressed, the front and rear moving members 210 move forward to prepare for the subsequent grabbing of the upper layer of pearl cotton 1. The upper and lower lifting members 220 are hydraulic cylinders arranged in the up and down directions. The hydraulic cylinder can provide overload protection when pressing the upper layer of pearl cotton 1 down to the heating mechanism 300, so as to avoid excessive downward pressure to damage the upper layer of pearl cotton 1 or the heating mechanism 300.

[0043] like Figures 4 to 8 As shown, the heating mechanism 300 includes two layers of heating plates 310 stacked in the up-down direction, each heating plate 310 includes a plurality of heating rollers 320, the axis of the heating rollers 320 is arranged in the left-right direction, and the plurality of heating rollers 320 are arranged in the front-back direction. The upper and lower layers of heating plates 310 heat the lower end of the upper layer of pearl cotton 1 and the upper end of the lower layer of pearl cotton 2 respectively. Compared with the existing thermal bonding machine which often only heats one piece of pearl cotton, the bonding part of the two pieces of pearl cotton is heated at the same time in the present device, which can improve the efficiency of the heating process, thereby improving the efficiency of the pearl cotton thermal bonding. For the upper and lower layers of heating plates 310, the diameters of the heating rollers 320 are the same, and the heating rollers 320 in the upper layer of heating plates 310 are offset against the heating rollers 320 in the lower layer of heating plates 310. Therefore, when the upper heating plate 310 contacts the upper layer of pearl cotton 1 and the lower heating plate 310 contacts the lower layer of pearl cotton 2, the heating rollers 320 in the upper heating plate 310 and the lower heating plate 310 rotate at the same speed and in opposite directions, further ensuring that the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 move backwards at the same speed when separated, thereby ensuring the accuracy of the bonding between the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2.

[0044] like Figures 4 to 7 As shown, the heating rollers 320 are all water heating rollers. The multiple water heating rollers are connected in sequence from the front to the back, and the hot water flows through each water heating roller in sequence from the water heating roller at the rear end to the front. Therefore, the direction in which the hot water flows through the multiple water heating rollers is opposite to the order in which the pearl cotton contacts the multiple water heating rollers, thereby improving the heat exchange efficiency between the water heating rollers and the pearl cotton, and improving the heating efficiency of the pearl cotton.

[0045] like Figure 8As shown, the water heating roller includes: a fixed shaft 330, on which a water inlet pipeline 331 and a drainage pipeline 332 are arranged; an inner roller body 340, on which the inner roller body 340 is fixed; an outer roller body 350, on which an outer roller can be rotatably arranged, and the outer roller is sleeved on the fixed shaft 330, and the outer roller and the inner roller form a hollow cylindrical water flow channel 360, and the two ends of the water flow channel 360 are respectively connected to the water inlet pipeline 331 and the drainage pipeline 332. A spiral blade 370 is arranged on the inner side of the outer roller body 350, and the rotation of the outer roller body 350 drives the spiral blade 370 to rotate, driving the water in the water flow channel 360 to flow from the water inlet pipeline 331 to the drainage pipeline 332. Therefore, the backward movement of the pearl cotton relative to the water heating roller will drive the rotation of the outer roller body 350, thereby driving the hot water to flow in the water flow channel 360.

[0046] It is conceivable that the heating rollers 320 can also be electric heating rollers. By using electric heating rollers to heat the pearl cotton, the overall structure of the heating mechanism 300 is simpler, the equipment cost is reduced, and maintenance is convenient.

[0047] The following is a specific example of thermal bonding of pearl cotton to illustrate the method of using the glue-free bonding machine of the present invention:

[0048] Step 1: stack two pieces of pearl cotton to be bonded up and down in the positioning structure 130 at the front end of the conveyor belt 110;

[0049] Step 2: The conveyor belt 110 transports the two pieces of pearl cotton backward to the bottom of the grabbing mechanism 200, and the upper and lower lifting members 220 drive the suction cup member 230 to move downward to grab the upper layer of pearl cotton 1;

[0050] Step 3: The front and rear moving parts 210 move backward synchronously with the conveyor belt 110, the conveyor belt 110 moves the lower layer of pearl cotton 2 to below the heating mechanism 300, the front and rear moving parts 210 move the upper layer of pearl cotton 1 to the heating mechanism 300, and the upper and lower lifting parts 220 descend to press the upper layer of pearl cotton 1 and the heating mechanism 300 downward, so that the lower end of the upper layer of pearl cotton 1 contacts the upper surface of the heating mechanism 300, and the upper end of the lower layer of pearl cotton 2 contacts the lower surface of the heating mechanism 300;

[0051] Step 4: The upper and lower lifting members 220 remain in a downward pressing state, while the front and rear moving members 210 and the conveyor belt 110 continue to move backward synchronously. After the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 move backward out of the range of the heating mechanism 300, the upper and lower lifting members 220 press the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 together.

[0052] In step 4, the backward movement of the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 drives the outer roller body 350 of the water heating roller to rotate, and the rotation of the outer roller body 350 drives the spiral blade 370 to rotate, driving the hot water to flow from the water inlet pipe 331 to the drainage pipe 332 in the water flow channel 360.

[0053] like Figure 5 As shown, the grabbing mechanism 200 on the left side grabs and lifts the upper layer of pearl cotton 1 by the lifting and lowering of the upper and lower lifting members 220. At the same time, the grabbing mechanism 200 on the right side has grabbed a piece of upper layer of pearl cotton 1 to the heating mechanism 300 for heating.

[0054] like Figure 6 As shown, the gripping mechanism 200 on the left side moves to the top of the heating mechanism 300, so that the upper layer of pearl cotton 1 is located above the heating mechanism 300, the conveyor belt 110 operates synchronously, so that the lower layer of pearl cotton 2 is located below the heating mechanism 300, and the upper and lower lifting members 220 descend to press the heating mechanism 300 downward, so that the lower end of the upper layer of pearl cotton 1 contacts the upper surface of the heating mechanism 300, and the upper end of the lower layer of pearl cotton 2 contacts the lower surface of the heating mechanism 300. At the same time, the gripping mechanism 200 on the right side presses the upper layer of pearl cotton 1 that has been heated up with the lower layer of pearl cotton 2.

[0055] like Figure 7 As shown, the upper and lower lifting members 220 remain in a downward pressure state, while the front and rear moving members 210 and the conveyor belt 110 continue to move backward synchronously, so that the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 both move backward while maintaining contact with the heating mechanism 300. After the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 move backward out of the range of the heating mechanism 300, the upper and lower lifting members 220 press the upper layer of pearl cotton 1 and the lower layer of pearl cotton 2 together, and the heating mechanism 300 moves upward and resets under the action of the spring. At the same time, the grabbing mechanism 200 on the right moves forward to grab the next piece of upper layer of pearl cotton 1 to be processed.

[0056] In some other specific embodiments of the present invention, a lifting member 140 is provided in the positioning structure 130. When the conveyor belt 110 transports the lower layer of pearl cotton 2 to the bottom of the heating mechanism 300, the lifting member 140 operates to lift the lower layer of pearl cotton 2 upward until the lower layer of pearl cotton 2 abuts against the lower surface of the heating mechanism 300, thereby heating the upper surface of the lower layer of pearl cotton 2.

[0057] In summary, the adhesive-free bonding machine provides a heating mechanism 300 on the conveyor belt 110, and heats two pieces of pearl cotton by contacting the heating mechanism 300 at the same time through the grabbing mechanism 200, thereby shortening the time required for heating the pearl cotton, improving production efficiency, and improving the energy utilization efficiency of the heat source of the heating mechanism 300. The use of two grabbing components to alternately grab the pearl cotton on the conveyor belt 110 for thermal bonding further improves production efficiency, while reducing the idle running time of the heating mechanism 300, thereby further improving energy utilization efficiency.

[0058] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A glueless bonding machine, characterized in that: include A frame, a conveyor belt is arranged on the frame along the front and rear direction, the conveyor belt is connected with a driving member, and positioning structures are evenly distributed on the conveyor belt along the front and rear direction, and two pieces of pearl cotton to be bonded are stacked up and down in the positioning structure; Two grabbing mechanisms, both of which are arranged on the frame, each of which comprises a front-and-rear moving member, an up-and-down lifting member and a suction cup member, the front-and-rear moving member is arranged at the upper end of the frame, the up-and-down lifting member is arranged at the lower end of the front-and-rear moving member, the suction cup member is arranged at the lower end of the front-and-rear moving member, and the suction cup member is arranged toward the conveyor belt, and the suction cup member grabs the upper layer of the pearl cotton through the driving of the up-and-down lifting member, so that the upper and lower pieces of the pearl cotton are separated; The heating mechanism is arranged on the frame so as to be movable up and down. The heating mechanism is connected to the frame through a spring. The heating mechanism is located above the conveyor belt. The suction cup member grabs the upper layer of pearl cotton and moves to the upper part of the heating mechanism under the drive of the front and rear moving members. The upper and lower lifting members drive the suction cup member to press down so that the lower end of the upper layer of pearl cotton contacts the upper surface of the heating mechanism. The heating mechanism is pressed down so that the upper end of the lower layer of pearl cotton contacts the lower surface of the heating mechanism. The heating mechanism includes two layers of heating plates stacked in the up and down direction, each heating plate includes multiple heating rollers, the axis of the heating rollers is set in the left and right direction, the multiple heating rollers are arranged in the front and back direction, the diameters of the heating rollers are the same, and the heating rollers in the upper heating plate are against the heating rollers in the lower heating plate.

2. The glue-free bonding machine according to claim 1, characterized in that: The heating rollers are all electrically heated rollers.

3. The glue-free bonding machine according to claim 1, characterized in that: The heating rollers are all water-heated rollers.

4. The glue-free bonding machine according to claim 3, characterized in that: The plurality of water heating rollers are connected in sequence from the front to the back, and the hot water flows through each of the water heating rollers in sequence from the rearmost water heating roller to the front.

5. The glue-free bonding machine according to claim 4, characterized in that: The water heated roller includes: A fixed shaft, on which a water inlet pipeline and a drainage pipeline are arranged; Inner roller body, the inner roller body is fixed on the fixed shaft; The outer roller body and the outer roller are rotatably arranged on the fixed shaft, the outer roller is sleeved on the fixed shaft, the outer roller and the inner roller form a hollow cylindrical water flow channel, and the two ends of the water flow channel are respectively connected with the water inlet pipeline and the drainage pipeline.

6. The glue-free bonding machine according to claim 5, characterized in that: A spiral blade is arranged inside the outer roller. The rotation of the outer roller drives the spiral blade to rotate, driving the water in the water flow channel to flow from the water inlet pipeline to the drainage pipeline.

7. The glue-free bonding machine according to claim 6, characterized in that: The up and down lifting parts are hydraulic cylinders arranged along the up and down directions.

8. A method for using a glue-free bonding machine, characterized in that: The glue-free bonding machine is the glue-free bonding machine according to claim 7, and the method of use comprises: Step 1: Place the two pieces of pearl cotton to be bonded on top of each other in the positioning structure at the front end of the conveyor belt; Step 2: The conveyor belt transports the two pieces of pearl cotton backward to the bottom of the grabbing mechanism, and the upper and lower lifting parts drive the suction cup parts to move downward to grab the upper layer of pearl cotton; Step 3: The front and rear moving parts move backward synchronously with the conveyor belt, the conveyor belt moves the lower layer of pearl cotton to the bottom of the heating mechanism, the front and rear moving parts move the upper layer of pearl cotton to the heating mechanism, and the upper and lower lifting parts descend to press the upper layer of pearl cotton and the heating mechanism downward, so that the lower end of the upper layer of pearl cotton contacts the upper surface of the heating mechanism, and the upper end of the lower layer of pearl cotton contacts the lower surface of the heating mechanism; Step 4: The upper and lower lifting parts keep in the downward pressing state, while the front and rear moving parts continue to move backward synchronously with the conveyor belt. After the upper and lower layers of pearl cotton move backward out of the range of the heating mechanism, the upper and lower lifting parts press the upper and lower layers of pearl cotton together.

9. The method for using the glue-free bonding machine according to claim 8, characterized in that: In step 4, the backward movement of the upper and lower layers of pearl cotton drives the outer roller of the water heating roller to rotate, and the rotation of the outer roller drives the spiral blades to rotate, driving the hot water to flow from the water inlet pipe to the drainage pipe in the water flow channel.

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