A hot melt adhesive fluidity performance detection device and method

Abstract

The present invention relates to the field of detection technologies, and in particular, provides a hot melt adhesive flow performance detection device and method. The hot melt adhesive flow performance detection device includes a barrel, the bottom end of the barrel is connected with a detection barrel, the detection barrel is a transparent tube, a hot melt barrel capable of lifting is arranged in the barrel, the outer wall of the hot melt barrel is slidably connected with the inner wall of the barrel, a heating tube is arranged in the hot melt barrel, a counterweight seat is fixed at the top end of the hot melt barrel, the bottom end of the hot melt barrel is closed, a guide sleeve is arranged in the hot melt barrel, the bottom end of the guide sleeve penetrates below the bottom of the hot melt barrel and enters the barrel, and the guide sleeve and the lumen of the detection barrel are on the same axis. This not only makes the detection effect more intuitive and enables a more intuitive observation of the flowability, but also, compared with the existing detection equipment with an image capture device, can also complete the flowability detection with a lower cost, which is convenient for market promotion.

Description

Technical Field

[0001] The present invention relates to the technical field of detection, and particularly relates to a device and method for detecting the flowability of hot melt adhesive. Background Art

[0002] In order to facilitate the storage or packaging of hot melt adhesive, it is made into a solid or semi-fluid state through technological means. When in use, the packaging bag is opened, one end of it is extruded from the bag mouth, and then it is applied to the application scenario. In the inspection link, the fluidity index of hot melt adhesive directly determines its product quality. Some existing fluidity detection devices for hot melt products are equipped with image capturers, which are not only large in volume but also high in cost. For the production site of hot melt adhesive rods, it is inconvenient to carry during sampling inspection, and it must be used with the assistance of an inspection platform, and it also occupies a large practical operation space. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides the following technical solutions:

[0004] A hot melt adhesive fluidity detection device, comprising a barrel. The bottom end of the barrel is connected to a detection barrel, and the detection barrel is a transparent tube. Inside the barrel, there is a hot melt barrel capable of lifting and lowering. The outer wall of the hot melt barrel is slidably connected to the inner wall of the barrel. Inside the hot melt barrel, there is a heating tube. The top end of the hot melt barrel is fixed with a counterweight seat, and the bottom end of the hot melt barrel is closed. Inside the hot melt barrel, there is a guide sleeve. The bottom end of the guide sleeve penetrates below the bottom of the hot melt barrel and enters the barrel. The guide sleeve and the lumen of the detection barrel are on the same axis. When the hot melt barrel descends with the guide sleeve, the guide sleeve is inserted into the detection barrel. At the connection between the bottom of the barrel cavity and the top of the detection barrel, there is an annular loading surface. The bottom surface of the hot melt barrel has an annular hot melt surface corresponding above the loading surface. When the hot melt barrel descends, the hot melt surface falls on the loading surface. There is a circle of detection grooves opened upward from the bottom end of the guide sleeve. The detection grooves are multiple, and the top ends of the detection grooves are close to the bottom surface of the hot melt barrel. When the bottom end of the guide sleeve is inserted into the detection barrel, the detection grooves are inserted into the detection barrel along the cavity wall of the detection barrel. There is a threaded hole on the guide sleeve, and the top end of the threaded hole penetrates the top surface of the guide sleeve. There is a connection hole on the counterweight seat, and a bolt is fixed in the connection hole. The bottom end of the bolt is connected in the threaded hole to detachably connect the counterweight seat to the top end of the barrel. The top end of the barrel is open and faces upward. Inside the detection barrel, there is a secondary detection mechanism. The secondary detection mechanism includes a detection rod perpendicular to the inside of the detection barrel and a detection plate fixed to the top end of the detection rod. The detection plate is located below the detection grooves and on the same axis as the detection grooves. There is a thin spring sleeved on the detection rod between the detection plate and the bottom of the detection barrel. The bottom of the detection barrel is closed, and the bottom end of the detection rod passes through the bottom of the detection barrel and is exposed below the bottom of the detection barrel. There are scales on the outer wall of the detection barrel, and the top end of the scales reaches the initial position of the detection plate. The number of detection rods is the same as the number of detection grooves. Each detection rod corresponds to the position below one detection groove. The lengths of all detection rods are the same, and the lengths of all thin springs are the same. In the initial state, under the elastic action of the top ends of the thin springs, all detection plates are supported at the same height position.

[0005] As a further preferred option, there is a vertical dividing rod inside the detection barrel. The dividing rod is located on the axis of the detection barrel. The top end of the dividing rod enters the guide sleeve, and the bottom end is connected to the bottom of the cavity of the detection barrel. All the detection rods and the detection plates at the top ends of all the detection rods are annularly arrayed on the outer circular surface of the dividing rod. The top surfaces of the detection plates are all recessed downward. The connection between the loading surface and the detection barrel is arc-shaped, so that an arc-shaped fluid discharge area is formed between the loading surface and the detection grooves.

[0006] As a further preferred option, a contact switch is fixed on the bottom surface of the counterweight seat. The contact switch is connected to the heating tube. The top end of the barrel has a pressing surface protruding in the circumferential direction. The contact switch is located above the pressing surface.

[0007] As a further preferred option, an inlay groove is opened on the bottom surface of the hot melt barrel, and a copper sheet is fixed in the inlay groove.

[0008] As a further preference, a guide hole is provided in the guide sleeve, the top end of the guide hole penetrates through the top end of the guide sleeve to reach the bottom surface of the counterweight seat, and the bottom end of the guide hole penetrates through the bottom end of the guide sleeve.

[0009] As a further preference, a first rounded surface is provided on the material loading surface, and a second rounded surface corresponding to the first rounded surface up and down is provided on the hot melting surface.

[0010] The present invention also provides a method for detecting the fluidity of hot melt adhesive, which is applicable to the hot melt adhesive fluidity detection device as described above, and includes the following steps:

[0011] Step S01: Cut out a sample of the same size from two kinds of hot melt adhesives to be detected, and make their masses consistent by weighing and grinding;

[0012] Step S02: Remove the hot melt cylinder and the guide sleeve from the material cylinder, place the first hot melt adhesive sample obtained in step S01 in the material cylinder, and reassemble the counterweight seat onto the hot melt cylinder;

[0013] Step S03: Pass an electric current into the hot melt cylinder, and utilize the counterweight function of the counterweight seat to make the hot melt cylinder automatically descend, and use the bottom end of the hot melt cylinder to extrude and melt the first hot melt adhesive sample and flow it into the detection cylinder, and complete the detection according to the flowing state after the sample melts;

[0014] Step S04: Repeat step S01 and step S02, place the second hot melt adhesive sample in the material cylinder, and reassemble the counterweight seat onto the hot melt cylinder;

[0015] Step S05: Repeat step S03, pass an electric current into the hot melt cylinder, and utilize the counterweight function of the counterweight seat to make the hot melt cylinder automatically descend, and use the bottom end of the hot melt cylinder to extrude and melt the second hot melt adhesive sample and flow it into the detection cylinder, and complete the detection according to the flowing state after the sample melts;

[0016] Step S06: Compare the fluidities of the two hot melt adhesive samples and draw a quality conclusion.

[0017] The beneficial effects of the present invention compared with the prior art are:

[0018] The device has a built-in heating function and is composed of a barrel, a hot melt barrel and other components. The hot melt barrel is located inside the barrel. A detection barrel with a scale is set at the bottom of the barrel, and a counterweight seat is set at the top of the hot melt barrel. When in use, the counterweight seat automatically starts the melting function after the hot melt barrel is lowered to melt the sample into a fluid state. These fluids flow into each detection groove on the circumference of the guide sleeve through the fluid discharge area between the material loading surface and the detection groove, and flow downward through these detection grooves. Under the positioning of these detection grooves, these fluids flow downward along the cavity wall of the detection barrel. There are scales on the outer wall of the detection barrel. According to the temperature used during melting, the fluid flows from the top scale to a certain scale, and the flow speed of the reference fluid on the cavity wall of the detection barrel, the flow performance of this hot melt adhesive sample can be verified. From the structural point of view, the device is a simple tubular structure with a small volume, which is convenient for inspectors to carry. From the operation point of view, the hot melt adhesive sample is cut from the production line and punched, then put into the barrel, and then the hot melt barrel is put back on the barrel, so that the heating and detection work can be completed automatically, which is convenient for operation. From the detection method point of view, the detection groove is used to position the fluid to flow downward along the cavity wall of the detection barrel, which not only makes the detection effect more intuitive and the fluidity can be observed more intuitively, but also can complete the fluidity detection compared with the existing detection equipment with image capture, and the cost is lower, which is convenient for market promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of an embodiment of the present invention at a first viewing angle;

[0020] Figure 2 is a schematic diagram of an embodiment of the present invention under a second viewing angle;

[0021] Figure 3 It is a schematic diagram of a main plan view after being cut apart in accordance with an embodiment of the present invention;

[0022] Figure 4 For the implementation mode of the present invention, Figure 3 The schematic diagram of the working principle under the three-dimensional perspective is introduced;

[0023] Figure 5 For the implementation mode of the present invention, Figure 4 The enlarged schematic diagram of the A part is shown;

[0024] Figure 6 For the implementation mode of the present invention, Figure 3 A schematic diagram from another perspective;

[0025] Figure 7 For the implementation mode of the present invention, Figure 6 An enlarged schematic diagram of part B is shown.

[0026] In the figure: 1, barrel; 2, detection cylinder; 3, hot melt cylinder; 4, heating tube; 5, counterweight seat; 6, guide sleeve; 7, guide hole; 8, loading surface; 9, hot melt surface; 10, detection groove; 11, threaded hole; 12, connection hole; 13, bolt; 14, detection rod; 15, detection plate; 16, contact switch; 17, pressing surface; 18, copper sheet; 19, thin spring; 20, first rounded surface; 21, second rounded surface; 22, dividing rod; 23, fluid discharge area. Specific embodiments

[0027] The following will clearly and completely describe the above and other embodiments and advantages of the present invention with reference to the accompanying drawings. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments.

[0028] In one embodiment, as Figures 1-7 shown:

[0029] This embodiment provides a hot melt adhesive flow performance detection device, including a barrel 1. The bottom end of the barrel 1 is connected to a detection cylinder 2. The detection cylinder 2 is a transparent tube. A hot melt cylinder 3 capable of lifting and lowering is provided inside the barrel 1. The outer wall of the hot melt cylinder 3 is slidably connected to the inner wall of the barrel 1. A heating tube 4 is provided inside the hot melt cylinder 3. A temperature control regulator (prior art) for controlling the temperature of the heating tube 4 is provided at a certain position outside the detection device. A counterweight seat 5 is fixed at the top end of the hot melt cylinder 3. The counterweight seat 5 can increase the self-weight of the hot melt cylinder 3, so that the hot melt cylinder 3 can descend along the barrel 1 due to its self-weight when placed in the barrel 1. The bottom end of the hot melt cylinder 3 is closed. A guide sleeve 6 is provided inside the hot melt cylinder 3. When the hot melt cylinder 3 is placed in the barrel 1, it will drive the guide sleeve 6 to descend, and the bottom end of the guide sleeve 6 will penetrate below the bottom of the hot melt cylinder 3 and enter the barrel 1. As the hot melt cylinder 3 continues to descend, the bottom section of the guide sleeve 6 will be inserted into the lumen of the detection cylinder 2. An annular loading surface 8 is provided at the connection between the bottom of the barrel 1 and the top of the detection cylinder 2. The bottom surface of the hot melt cylinder 3 is provided with an annular hot melt surface 9 corresponding above the loading surface 8. When the hot melt cylinder 3 descends, the hot melt surface 9 falls on the loading surface 8. A circle of detection grooves 10 is opened upward from the bottom end of the guide sleeve 6. There are multiple detection grooves 10, and the top ends of the detection grooves 10 are close to the bottom surface of the hot melt cylinder 3. When the bottom end of the guide sleeve 6 is inserted into the detection cylinder 2, the detection grooves 10 are inserted into the detection cylinder 2 along the inner wall of the detection cylinder 2. A threaded hole 11 is opened on the guide sleeve 6, and the top end of the threaded hole 11 penetrates the top surface of the guide sleeve 6. A connection hole 12 is opened on the counterweight seat 5, and a bolt 13 is fixed in the connection hole 12. The bottom end of the bolt 13 is connected in the threaded hole 11 to detachably connect the counterweight seat 5 to the top end of the barrel 1. The top end of the barrel 1 is open and the opening faces upward. When the hot melt cylinder 3 is removed upward with the counterweight seat 5 and other components, the hot melt adhesive sample is put into the barrel 1 from the opening. The bottom surface of the sample falls on the loading surface 8, and the top surface of the sample faces the bottom surface of the hot melt cylinder 3, that is, the top surface of the sample faces the hot melt surface 9.

[0030] As Figure 7 shown, a vertical dividing rod 22 is provided in the detection cylinder 2. The dividing rod 22 is located on the axis of the detection cylinder 2. The top end of the dividing rod 22 enters the guide sleeve 6, and the bottom end is connected to the bottom of the cavity of the detection cylinder 2. All the detection rods 14 and the detection plates 15 at the top ends of all the detection rods 14 are annularly arrayed on the outer circumferential surface of the dividing rod 22. The top surfaces of the detection plates 15 are all recessed downward. The connection between the material loading surface 8 and the detection cylinder 2 is a circular arc transition, so that an arc-shaped fluid discharge area 23 is formed between the material loading surface 8 and the detection groove 10. The dividing rod 22 is located at the center position of all the detection grooves 10. One is to guide the lifting of the guide sleeve 6 through the guide hole 7, and the other is to limit the fluid flowing into the detection groove 10 to lean against the cavity wall of the detection cylinder 2, so that the fluid flows downward along the cavity wall of the detection cylinder 2 as much as possible.

[0031] As Figure 3 shown, a contact switch 16 is fixed on the bottom surface of the counterweight seat 5. The contact switch 16 is connected to the heating tube 4. The top end of the material cylinder 1 is provided with a pressing surface 17 protruding in the circumferential direction. The contact switch 16 is located above the pressing surface 17. After the counterweight seat 5 drives the hot-melting cylinder 3 to descend, the contact switch 16 on the bottom surface of the counterweight seat 5 will fall onto the pressing surface 17 at the top end of the material cylinder 1, and the contact switch 16 is turned on, and the heating tube 4 automatically heats up. The heating structure does not require manual control and is convenient to operate.

[0032] A guide hole 7 is opened in the guide sleeve 6. The top end of the guide hole 7 penetrates through the top end of the guide sleeve 6 to reach the bottom surface of the counterweight seat 5, and the bottom end of the guide hole 7 penetrates through the bottom end of the guide sleeve 6.

[0033] During use, remove the hot melt cylinder 3 together with the weight seat 5 and the guide sleeve 6 from the cartridge 1. Then, place the hot melt adhesive sample into the cartridge 1. The sample has a central through-hole (the sample is annular). When the sample is placed in the cartridge 1, the through-hole is in the descending direction of the guide sleeve 6. The sample lands on the loading surface 8 at the bottom of the cartridge 1, and the top surface of the sample faces the bottom surface (hot melt surface 9) of the hot melt cylinder 3 and is directly opposite to the copper sheet 18. Insert the hot melt cylinder 3 together with the weight seat 5 and the guide sleeve 6 back into the cartridge 1. After releasing, the weight seat 5 loses weight and drives the hot melt cylinder 3 to rapidly descend. The hot melt cylinder 3 drives the copper sheet 18 to rapidly descend, and the hot melt cylinder 3 drives the guide sleeve 6 to rapidly descend. The guide sleeve 6 rapidly descends along the dividing rod 22. The guide sleeve 6 passes through the round hole of the sample and inserts into the detection cylinder 2. The copper sheet 18 lands on the top surface of the sample. Under the action of gravity, the contact switch 16 lands on the pressing surface 17, and the contact switch 16 is turned on to energize and heat the heating tube 4. The heat is transferred from the bottom end of the hot melt cylinder 3 to the copper sheet 18, and then from the copper sheet 18 to the sample. The copper sheet 18 heats the sample, causing the sample to rapidly melt into a semi-fluid or fluid state within a short time. These fluids flow into each detection groove 10 on the circumference of the guide sleeve 6 through the fluid discharge area 23 between the loading surface 8 and the detection groove 10, and flow downward through these detection grooves 10. Under the positioning of these detection grooves 10, these fluids flow downward along the inner wall of the detection cylinder 2. There are scales on the outer wall of the detection cylinder 2. According to the temperature used during melting, as well as the fluid flowing from the top scale to a certain scale downward, and the flowing speed of the reference fluid on the inner wall of the detection cylinder 2, the flow performance of this hot melt adhesive sample can be verified. From a structural perspective, this device is a simple tubular structure with a small volume and is convenient for inspectors to carry around. From an operation method perspective, after intercepting a hot melt adhesive sample from the production line and punching holes, place it into the cartridge 1, and then install the hot melt cylinder 3 back onto the cartridge 1, and the heating and detection work can be automatically completed, which is convenient for operation. From a detection method perspective, using the detection groove 10 to position the fluid to flow downward along the inner wall of the detection cylinder 2 not only makes the detection effect more intuitive and enables a more direct observation of the flowability, but also compared with the existing detection equipment with an image capture device, it can also complete the flowability detection with a lower cost, which is convenient for market promotion.

[0034] In addition, in another embodiment, as Figures 3-7As shown in the figure, a secondary detection mechanism is provided inside the detection cylinder 2. The secondary detection mechanism includes a detection rod 14 perpendicular to the inside of the detection cylinder 2 and a detection plate 15 fixed to the top end of the detection rod 14. The detection plate 15 is located below the detection groove 10 and is on the same axis as the detection groove 10. A thin spring 19 sleeved on the detection rod 14 is provided between the detection plate 15 and the bottom of the detection cylinder 2. The bottom of the detection cylinder 2 is closed. The bottom end of the detection rod 14 passes through the bottom of the detection cylinder 2 and is exposed below the bottom of the detection cylinder 2. A scale is provided on the outer wall of the detection cylinder 2, and the top end of the scale reaches the initial position of the detection plate 15. The number of detection rods 14 is the same as the number of detection grooves 10. Each detection rod 14 corresponds to being below one detection groove 10. The lengths of all detection rods 14 are the same, and the lengths of all thin springs 19 are the same. In the initial state, under the elastic action of the top end of the thin spring 19, all detection plates 15 are supported at the same height position. When the fluid flows into each detection groove 10 on the circumference of the guide sleeve 6 through the fluid discharge area 23, it flows downward through each detection groove 10 and then falls on the corresponding detection plate 15. The top surface of the detection plate 15 is concave, so the fluid will form pressure on the detection plate 15. As the pressure of the fluid volume increases to exceed the supporting force of the thin spring 19 on the detection plate 15, these detection plates 15 will descend, driving the detection rod 14 to descend with the detection plate 15, and the thin spring 19 compresses and shortens. According to the position change of the detection plate 15 on the scale when it descends, the fluidity of the hot melt adhesive can be observed more intuitively. Since there are several detection plates 15, correspondingly, several scales corresponding to these detection plates 15 are provided on the outer wall of the detection cylinder 2. When all these detection plates 15 descend, record their descending distances according to their changing positions on the scale. For example, when detecting two or more hot melt adhesives by the same detection method, obtain the average value according to the data changes of these detection plates 15 to know which hot melt adhesive has better fluidity performance.

[0035] As Figure 3 、 Figure 6 and Figure 7 shown in the figure, a first rounded surface 20 is provided on the material loading surface 8, and a second rounded surface 21 corresponding to the first rounded surface 20 up and down is provided on the hot melting surface 9. When the hot melt adhesive sample is heated and melted between the hot melting surface 9 and the material loading surface 8, it can flow more smoothly into the fluid discharge area 23 along the upper and lower rounded surfaces, ensuring that the fluid is distributed from the fluid discharge area 23 into each detection groove 10.

[0036] As Figure 3 、 Figure 4 shown in the figure, an embedding groove is provided on the bottom surface of the hot melting cylinder 3, and a copper sheet 18 is fixed in the embedding groove. Fixing the copper sheet 18 can improve the thermal conductivity, enabling the heat on the hot melting cylinder 3 to be transferred to the copper sheet 18 in a short time, and then transferred from the copper sheet 18 to the sample in a short time, accelerating the thermalization speed of the sample.

[0037] The present invention also provides a method for detecting the fluidity of hot melt adhesives, which is applicable to the hot melt adhesive fluidity detection device as described above, and includes the following steps:

[0038] Step S01: Cut out a section of samples of the same size from two or more hot melt adhesives to be detected, and make their masses consistent through weighing and grinding;

[0039] Step S02: Remove the hot melt cylinder 3 and the guide sleeve 6 from the barrel 1, place the first hot melt adhesive sample obtained in Step S01 in the barrel 1, and reassemble the counterweight seat 5 onto the hot melt cylinder 3;

[0040] Step S03: Pass an electric current through the hot melt cylinder 3, and utilize the counterweight function of the counterweight seat 5 to make the hot melt cylinder 3 automatically descend. Then, use the bottom end of the hot melt cylinder 3 to extrude and melt the first hot melt adhesive sample and let it flow into the detection cylinder 2, and complete the detection according to the flow state of the sample after melting;

[0041] Step S04: Repeat Step S01 and Step S02, place the second hot melt adhesive sample in the barrel 1, and reassemble the counterweight seat 5 onto the hot melt cylinder 3;

[0042] Step S05: Repeat Step S03, pass an electric current through the hot melt cylinder 3, and utilize the counterweight function of the counterweight seat 5 to make the hot melt cylinder 3 automatically descend. Then, use the bottom end of the hot melt cylinder 3 to extrude and melt the second hot melt adhesive sample and let it flow into the detection cylinder 2, and complete the detection according to the flow state of the sample after melting;

[0043] Step S06: Compare the fluidities of the two hot melt adhesive samples, and draw a quality conclusion based on the scale change.

[0044] The above orientation references do not represent the specific orientations of the components in this embodiment. This embodiment is only for the convenience of describing the solution, and the relative description is set with reference to the orientations in the figure. In essence, the specific orientations of the components are based on their actual installation, actual use, and the habitual orientation descriptions of those skilled in the art. This is hereby explained.

[0045] The above specific implementation manners have further elaborated on the invention purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above is only the specific implementation manner of the present invention and is not used to limit the protection scope of the present invention. In particular, it is pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hot melt adhesive flow performance detection device, characterized in that: The material barrel comprises a material barrel, the bottom end of which is connected with a detection barrel, which is a transparent tube, a hot melt barrel capable of lifting and lowering is arranged in the material barrel, the outer wall of the hot melt barrel is slidably connected with the inner wall of the material barrel, a heating tube is arranged in the hot melt barrel, a counterweight seat is fixed on the top end of the hot melt barrel, the bottom end of the hot melt barrel is closed, a guide sleeve is arranged in the hot melt barrel, the bottom end of the guide sleeve penetrates to the bottom of the hot melt barrel and enters into the material barrel, and the guide sleeve and the tube cavity of the detection barrel are on the same axis; when the hot melt barrel descends with the guide sleeve, the guide sleeve is inserted into the detection barrel; An annular loading surface is provided at the connection between the cavity bottom of the cylinder and the top of the detection cylinder, and an annular hot melt surface is provided on the bottom surface of the hot melt cylinder corresponding to the loading surface; when the hot melt cylinder descends, the hot melt surface falls on the loading surface; a circle of detection grooves is provided from the bottom end of the guide sleeve upward, and there are multiple detection grooves, and the top of the detection groove is close to the bottom surface of the hot melt cylinder; when the bottom end of the guide sleeve is inserted into the detection cylinder, the detection groove is inserted into the detection cylinder along the cavity wall of the detection cylinder; a threaded hole is provided on the guide sleeve, and the top of the threaded hole passes through the top surface of the guide sleeve, A connecting hole is provided on the counterweight seat, and a bolt is fixed in the connecting hole. The bottom end of the bolt is connected to the threaded hole to detachably connect the counterweight seat to the top end of the barrel. The top end of the barrel is open and the opening faces upward; a secondary detection mechanism is provided in the detection barrel, and the secondary detection mechanism includes a detection rod vertically in the detection barrel and a detection plate fixed at the top end of the detection rod. The detection plate is located below the detection slot and is on the same axis as the detection slot. A fine spring sleeved on the detection rod is provided between the detection plate and the bottom of the detection barrel. The bottom of the detection barrel is closed, and the bottom end of the detection rod passes through the bottom of the detection barrel and is exposed below the bottom of the detection barrel. A scale is provided on the outer wall of the detection barrel, and the top end of the scale reaches the initial position of the detection plate. The number of detection rods is consistent with the number of detection slots, and each detection rod corresponds to the bottom of a detection slot. The lengths of all detection rods are consistent, and the lengths of all fine springs are consistent. In the initial state, under the elastic action of the top of the fine spring, all detection plates are supported at the same height.

2. The hot melt adhesive flow performance detection device according to claim 1, characterized in that: A vertical dividing rod is provided in the detection tube. The dividing rod is located on the axis of the detection tube. The top end of the dividing rod enters the guide sleeve, and the bottom end is connected to the bottom of the cavity of the detection tube. All the detection rods and the detection plates at the top of all the detection rods are arranged in a circular array on the outer circular surface of the dividing rod. The top surfaces of the detection plates are all concave downwards. The connection between the loading surface and the detection tube is an arc transition, so that an arc-shaped fluid discharge area is formed between the loading surface and the detection groove.

3. The hot melt adhesive flow performance detection device according to claim 2, characterized in that: A contact switch is fixed on the bottom surface of the counterweight seat, the contact switch is connected to the heating tube, and a pressing surface protruding in the circumferential direction is provided on the top of the barrel, and the contact switch is located above the pressing surface.

4. The hot melt adhesive flow performance detection device according to claim 3, characterized in that: An inlay groove is provided on the bottom surface of the hot melt cylinder, and a copper sheet is fixed in the inlay groove.

5. The hot melt adhesive flow performance detection device according to claim 4, characterized in that: A guide hole is provided in the guide sleeve, the top end of the guide hole penetrates the top end of the guide sleeve to reach the bottom surface of the counterweight seat, and the bottom end of the guide hole penetrates the bottom end of the guide sleeve.

6. The hot melt adhesive flow performance detection device according to claim 5, characterized in that: A first rounded corner surface is arranged on the material-carrying surface, and a second rounded corner surface corresponding to the first rounded corner surface is arranged on the hot-melt surface.

7. A method for detecting the fluidity of a hot melt adhesive, using the hot melt adhesive fluidity performance detection device according to claim 1 for detection, characterized in that: The following steps are involved: Step S01, cutting out a sample of the same size from two hot melt adhesives to be tested, respectively, and making them have the same quality by weighing and polishing; Step S02, removing the hot melt tube and the guide sleeve from the barrel, placing the first hot melt adhesive sample obtained in step S01 in the barrel, and reassembling the counterweight seat onto the hot melt tube; Step S03, current is supplied to the hot melt cylinder, and the counterweight of the counterweight seat is used to make the hot melt cylinder automatically drop, and the first hot melt adhesive sample is squeezed and melted by the bottom end of the hot melt cylinder and then flows into the detection cylinder, and the detection is completed according to the flow state of the melted sample; Step S04, repeating steps S01 and S02, placing a second hot melt adhesive sample in the barrel, and reassembling the counterweight seat onto the hot melt barrel; Step S05, repeating step S03, passing current through the hot melt tube, and using the counterweight of the counterweight seat to make the hot melt tube automatically drop, using the bottom of the hot melt tube to squeeze and melt the second hot melt adhesive sample and then flow it into the detection tube, and completing the detection according to the flow state of the melted sample; Step S06: for each sample, the flowability of the sample is obtained according to the average value of the descending distances of multiple test plates; the flowability of two hot melt adhesive samples is compared to draw a quality conclusion.

Images