Packaging bag sealing and pressing device and defect detection method

Abstract

The invention belongs to the technical field of product packaging, and provides a packaging bag sealing press-fit device and a defect detection method.The packaging bag sealing press-fit device comprises a rolling press-fit assembly with a rolling wheel and a connecting rod, a pressure applying adjusting assembly, a displacement obtaining assembly and a transverse moving assembly with a transverse moving sliding rail, and the periphery of the connecting rod is sleeved with the pressure applying adjusting assembly; the displacement obtaining assembly is connected with the pressure applying adjusting assembly and the transverse moving sliding rail so that the transverse moving sliding rail can drive the rolling wheel to move, then secondary pressing of packaging bag sealing is achieved, in the secondary pressing process, the displacement obtaining assembly outputs a first distance and a second distance, and the transverse moving assembly outputs a third distance. The motion curve graph and the difference percentage between the second distance and the third distance can be obtained according to the first distance, the second distance and the third distance, defect detection can be effectively carried out on packaging bag sealing based on the motion curve graph and the difference percentage, the accuracy of a detection result is remarkably improved, and positioning of a poor sealing position is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of product packaging, and in particular to a packaging bag sealing and pressing device and a defect detection method. Background Art

[0002] Semiconductor silicon wafers are the basic materials for manufacturing integrated circuits and semiconductor devices. The production process of silicon wafers has extremely strict requirements on the cleanliness of the environment and process. During the production and packaging process of silicon wafers, even slight contamination may have a significant impact on the quality and yield of silicon wafers. Therefore, maintaining the cleanliness of the silicon wafer surface is crucial to ensure the quality of semiconductor devices. In order to ensure that the silicon wafers will not be damaged or contaminated during transportation, packaging technology is often used to package the clean silicon wafers after cleaning to prevent pollutants in the environment from contaminating the silicon wafers.

[0003] The packaging process of silicon wafers includes the step of hot-pressing the packaging bag containing the silicon wafers. Specifically, after the silicon wafers are processed and cleaned, the silicon wafers are packaged using clean packaging technology in an ultra-clean environment, and the seal of the packaging bag is sealed by heating and pressurizing to prevent pollutants in the external environment from entering the packaging bag and contaminating the silicon wafers. However, in the actual production process of the semiconductor industry, when the seal of the packaging bag is hot-pressed and sealed, there is often a problem of poor sealing, which causes the packaging bag to leak, and then causes serious quality accidents, causing huge economic losses to the company.

[0004] At present, in the semiconductor industry, the inspection of the sealing quality of packaging bags is often judged by manual or machine-based visual analysis methods. However, due to the limitations of vision, during the inspection of the sealing quality of packaging bags, only obviously visible wrinkles and poor sealing can be identified, which greatly increases the risk of packaging bag leakage. Therefore, a new packaging bag sealing and pressing device and defect detection method are urgently needed to improve the sealing quality of packaging bags and the accuracy of sealing defect identification. Summary of the invention

[0005] The purpose of this application is to provide a packaging bag sealing and pressing device and a defect detection method, which are used to solve the problem of poor accuracy in judging the sealing quality of packaging bags in the prior art, and can improve the sealing quality of packaging bags and improve the accuracy of packaging bag sealing defect detection.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the present application provides a packaging bag sealing and pressing device, including a hot plate platform, a rolling pressing component, a pressure adjustment component, a displacement acquisition component and a lateral movement component;

[0007] The rolling and pressing assembly is located on the hot plate platform, and comprises a pressing part and a connecting rod, one end of the connecting rod is connected to the pressing part, and the pressing part comprises a roller for pressing and sealing the packaging bag;

[0008] The lateral movement assembly includes a lateral movement rail, which is arranged above the hot plate platform at intervals and can move along a first direction, wherein the first direction is an extension direction of the lateral movement rail and is parallel to the upper surface of the hot plate platform;

[0009] The pressure adjustment component is sleeved on the outer circumference of the connecting rod and connected to the displacement acquisition component, and the pressure adjustment component can apply a force along a second direction to the connecting rod, wherein the second direction is an axial direction of the connecting rod;

[0010] The displacement acquisition component is connected to the transverse slide rail so that the transverse slide rail drives the roller to move along the first direction. The displacement acquisition component is used to acquire a first distance and a second distance, wherein the first distance is the displacement of the connecting rod along the second direction, and the second distance is the rolling distance of the roller.

[0011] Optionally, the lateral movement assembly further includes a driving unit, which is used to drive the lateral movement rail to move along the first direction and output a third distance, wherein the third distance is a distance that the lateral movement rail moves along the first direction.

[0012] Optionally, the displacement acquisition component includes a first sensor and a second sensor;

[0013] The first sensor is connected to the pressing part and is used to obtain the second distance and the roller speed;

[0014] The second sensor is connected to the transverse slide rail and is used to obtain the first distance. A first through hole is provided in the second sensor and passes through the second direction. The connecting rod passes through the first through hole and extends to a side of the second sensor away from the roller.

[0015] Optionally, the pressure adjustment assembly includes an elastic pressure portion, a fixed base and an adjustment kit;

[0016] The fixed base is located between the second sensor and the roller, and is fixedly connected to the outer circumference of the connecting rod;

[0017] The adjustment kit is at least partially located in the first through hole and connected to the second sensor. A second through hole is formed in the adjustment kit, and the second through hole is coaxially arranged with the connecting rod.

[0018] The elastic pressure portion surrounds the outer side of the connecting rod and is located between the fixed base and the adjustment kit. The adjustment kit can press down the elastic pressure portion to apply a force along the second direction to the connecting rod through the fixed base.

[0019] Optionally, the adjustment kit comprises a top cap and a bottom rod connected to each other, the top cap is located at a side of the second sensor away from the roller, and the bottom rod is located between the top cap and the elastic pressure portion;

[0020] The first through hole is a threaded hole, and threads are arranged on the outer peripheral surface of the bottom rod, so that the adjustment kit is fixedly connected to the second sensor through the first through hole and can move along the second direction.

[0021] The present application also provides a packaging bag sealing defect detection method, which uses any packaging bag sealing and pressing device in the aforementioned embodiments to detect the sealing defects of the packaging bag, comprising the following steps:

[0022] Adjusting the working state of the packaging bag sealing and pressing device;

[0023] Place the package bag on the hot plate platform;

[0024] Performing heat-pressure sealing operation on the sealing of the packaging bag;

[0025] Controlling the transverse slide rail to move along a first direction to perform a secondary pressing operation on the sealing of the packaging bag;

[0026] Obtain the first distance, the second distance and the third distance respectively;

[0027] Draw a motion curve diagram according to the first distance and the third distance;

[0028] Calculate the difference percentage using the second distance and the third distance;

[0029] Whether the packaging bag is poorly sealed is determined based on the motion curve diagram and the difference percentage.

[0030] Optionally, adjusting the working state of the packaging bag sealing and pressing device comprises the following steps:

[0031] Adjusting the extension direction of the connecting rod so that the second direction is perpendicular to the upper surface of the hot plate platform;

[0032] The second sensor of the displacement acquisition assembly is fixedly connected to the transverse slide rail;

[0033] According to a preset first pressure, adjusting the pressure of the rolling pressing assembly on the hot plate platform through the pressure adjusting assembly;

[0034] According to a preset first speed, the moving speed of the transverse slide rail along the first direction is set.

[0035] Optionally, drawing a motion curve graph according to the first distance and the third distance comprises the following steps:

[0036] The first direction and the second direction are respectively used as the x-axis and the y-axis to establish a plane rectangular coordinate system;

[0037] The motion curve is drawn in the plane rectangular coordinate system with the first distance and the third distance as the ordinate and the abscissa respectively, so as to form the motion curve graph.

[0038] Optionally, judging whether the packaging bag is poorly sealed according to the motion curve diagram and the difference percentage comprises the following steps:

[0039] Based on the first distance, calculating a vertical center value;

[0040] The vertical upper limit value and the vertical lower limit value are calculated by using the preset upper limit coefficient and the lower limit coefficient; wherein the vertical upper limit value s m =k m *s c , the vertical lower limit s n =k n *s c ,s c is the vertical center value, k m is the upper limit coefficient, k n is the lower limit coefficient;

[0041] Draw an upper reference line and a lower reference line in the motion curve diagram according to the vertical upper limit value and the vertical lower limit value;

[0042] It is determined whether the difference percentage and the motion curve diagram meet a good product determination condition.

[0043] Optionally, the good product judgment condition is that the difference percentage is less than a preset first difference threshold, and in the motion curve diagram, the motion curve corresponding to the sealing of the packaging bag is located between the upper reference line and the lower reference line.

[0044] The packaging bag sealing and pressing device and defect detection method provided in this application have at least the following beneficial effects:

[0045] On the one hand, the packaging bag sealing and pressing device of the present application utilizes a pressure adjusting component to enable the roller to apply pressure to the hot pressing platform, and utilizes a lateral moving component to drive the roller to move, thereby realizing a secondary pressing operation on the packaging bag sealing, improving the hot pressing sealing effect of the packaging bag sealing, and the pressure adjusting component can adjust the pressure of the roller on the hot pressing platform, thereby ensuring the pressing effect on the packaging bag sealing, and further improving the hot pressing sealing effect; at the same time, the first distance, the second distance and the third distance are obtained in real time during the hot pressing process to detect the sealing defects of the packaging bag, thereby realizing the dual effects of improving the sealing quality of the packaging bag sealing and detecting defects.

[0046] Secondly, the packaging bag sealing defect detection method of the present application utilizes the above-mentioned packaging bag sealing pressing device to perform defect detection, and therefore also has the above-mentioned beneficial effects. In addition, by controlling the travel speed of the roller and the pressure of the roller on the hot pressing platform, the secondary pressing effect of the packaging bag seal can be effectively guaranteed. By utilizing the motion curve diagram and the difference percentage, the sealing quality of the packaging bag can be effectively and intuitively judged, thereby improving the accuracy of the sealing defect detection results and being able to achieve effective positioning of the poor sealing position. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 Shown is a schematic diagram of the structure of the packaging bag sealing and pressing device provided in Example 1 of the present application.

[0049] Figure 2 Shown is a top view of the second sensor provided in the first embodiment of the present application.

[0050] Figure 3 Shown is a schematic diagram of the structure of the pressure regulating assembly provided in Example 1 of the present application.

[0051] Figure 4 Display as Figure 3 A schematic top view of the structure of the pressure regulating assembly is shown.

[0052] Figure 5 Display as Figure 3 A schematic diagram of the structure of the adjustment kit in the pressure adjustment assembly is shown.

[0053] Figure 6 Shown is a schematic diagram of the specific structure of the packaging bag sealing and pressing device provided in Example 2 of the present application.

[0054] Figure 7 Shown is a flow chart of a packaging bag sealing defect detection method provided in Example 2 of the present application.

[0055] Figure 8 Displayed is the motion curve diagram provided in Example 2 of the present application.

[0056] Fig. 9 Displayed is a motion curve diagram with an upper reference line and a lower reference line provided in the second embodiment of the present application.

[0057] Reference numerals:

[0058] 11. Hot plate platform; 111. Heat sealing strip; 12. Rolling pressing assembly; 121. Pressing part; 1211. Roller; 122. Connecting rod; 13. Pressure adjustment assembly; 131. Second through hole; 132. Elastic pressure part; 133. Fixed base; 134. Adjustment kit; 1341. Top cap; 1342. Bottom rod; 14. Displacement acquisition assembly; 141. First sensor; 142. Second sensor; 1421. First through hole; 15. Lateral movement assembly; 151. Lateral slide rail; 152. Driving part. DETAILED DESCRIPTION

[0059] In order to make the technical purpose, technical solution and technical effect of the present application clearer, the technical solution in the present application will be clearly and completely described in conjunction with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0060] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application.

[0062] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. In addition, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the implementation or example are included in at least one implementation or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more implementations or examples in a suitable scheme.

[0063] Embodiment 1

[0064] This embodiment provides a packaging bag sealing and pressing device, which is used to improve the sealing quality of packaging bag packaging operations in the prior art, and can be used to judge the sealing quality of packaging bags and identify sealing defects of packaging bags, especially for packaging bags of semiconductor silicon wafers. Figure 1 The packaging bag sealing and pressing device provided in this embodiment includes a hot plate platform 11, a rolling pressing component 12, a pressure regulating component 13, a displacement obtaining component 14 and a lateral moving component 15.

[0065] The rolling and pressing assembly 12 is located on the hot plate platform 11, and the hot plate platform 11 provides a working space for the packaging operation and sealing defect detection of the packaging bag. The rolling and pressing assembly 12 includes a pressing part 121 and a connecting rod 122. The pressing part 121 includes a roller 1211. The roller 1211 is used to press the seal of the packaging bag, thereby realizing the pressing and sealing of the packaging bag. One end of the connecting rod 122 is connected to the pressing part 121, and the roller 1211 can be driven to move through the connecting rod 122. Optionally, the pressing part 121 can also include a pressure roller bracket, which is connected to the roller 1211 and can make the roller 1211 roll and move. The connecting rod 122 is connected to the pressure roller bracket to drive the roller 1211 to move through the pressure roller bracket.

[0066] The transverse moving assembly 15 includes a transverse slide rail 151, which is located above the hot plate platform 11 and is spaced apart from the hot plate platform 11. The extension direction of the transverse slide rail 151 is recorded as a first direction. The transverse slide rail 151 can move along the first direction, and the transverse slide rail 151 is parallel to the hot plate platform 11, so that the first direction is parallel to the upper surface of the hot plate platform 11.

[0067] The pressure regulating component 13 is sleeved on the outer circumference of the connecting rod 122 and connected to the displacement acquisition component 14. The pressure regulating component 13 can apply a force along the second direction to the connecting rod 122, wherein the second direction is the axial direction of the connecting rod 122. Optionally, the connecting rod 122 is perpendicular to the hot plate platform 11, so that the second direction is perpendicular to the upper surface of the hot plate platform 11, and then through the pressure regulating component 13, the roller 1211 can press down the hot plate platform 11, so that the compression seal of the packaging bag can be achieved during use.

[0068] The displacement acquisition component 14 is connected to the transverse slide rail 151, so that the transverse slide rail 151 can drive the roller 1211 to move in the first direction. The transverse slide rail 151 can keep the height of the displacement acquisition component 14 to the hot plate platform 11 unchanged, thereby ensuring that the pressure adjustment component 13 can apply a force in the second direction to the connecting rod 122. The displacement acquisition component 14 is used to obtain a first distance and a second distance, wherein the first distance is the displacement of the connecting rod 122 in the second direction, and the second distance is the rolling distance of the roller 1211. Specifically, the rolling distance is the moving distance of the roller 1211, which can be understood as the moving distance of the roller 1211 along the upper surface of the hot plate platform 11 and along the upper surface of the packaging bag seal.

[0069] When in use, the transverse slide rail 151 is controlled to move in the first direction, and the transverse slide rail 151 can drive the packaging bag sealing and pressing device to move in the first direction through the displacement acquisition component 14. When the seal of the packaging bag is located in the travel direction of the packaging bag sealing and pressing device, the sealing of the packaging bag can be pressed by the rolling pressing component 12, and the first distance and the second distance are obtained at the same time. After the packaging bag seal is subjected to the hot pressing process, the secondary pressing of the seal is achieved by the packaging bag sealing and pressing device, thereby improving the sealing quality of the packaging bag seal, and the first distance and the second distance are obtained synchronously during the pressing process. The first distance and the second distance can be used to detect the sealing defects of the packaging bag, thereby achieving the dual effects of improving the sealing effect of the packaging bag seal and detecting defects.

[0070] In this embodiment, refer to Figure 1 The lateral moving assembly 15 further includes a driving unit 152, which is connected to the lateral sliding rail 151 and is used to drive the lateral sliding rail 151 to move along the first direction. The driving unit 152 can also output the distance of the lateral sliding rail 151 moving along the first direction, which is recorded as a third distance. The third distance, in combination with the first distance and the second distance, can be used to detect the sealing quality of the packaging bag, further improve the accuracy of the detection result, and reduce the risk of packaging bag leakage.

[0071] In this embodiment, refer to Figure 1The displacement acquisition component 14 includes a first sensor 141 and a second sensor 142. The first sensor 141 is connected to the pressing part 121 and is used to obtain the second distance. Optionally, the first sensor 141 can also obtain the rotation speed of the roller 1211 and record it as the roller rotation speed. The travel speed of the packaging bag sealing and pressing device can be determined by the roller rotation speed, thereby realizing the monitoring of the working state of the packaging bag sealing and pressing device, preventing secondary damage to the packaging bag seal caused by equipment abnormalities such as the roller 1211 being stuck, and ensuring the working stability of the equipment.

[0072] Reference Figure 1 and Figure 2 The second sensor 142 is connected to the transverse slide rail 151 and is used to obtain the first distance. The second sensor 142 is provided with a first through hole 1421 penetrating along the second direction. The connecting rod 122 passes through the first through hole 1421 and extends to the side of the second sensor 142 away from the roller 1211. Optionally, the first through hole 1421 and the connecting rod 122 are coaxially arranged.

[0073] In an optional embodiment, the first sensor 141 is a rotary encoder, and the second sensor 142 is a position sensor. The first sensor 141 is connected to the pressing portion 121, and can measure the second distance of the roller 1211 and the roller speed. The second sensor 142 is fixedly connected to the transverse slide rail 151, for example, it can be detachably fixedly connected to the transverse slide rail 151 by bolts, nuts, clamping devices, etc. The second sensor 142 is sleeved on the outside of the connecting rod 122, and can monitor the position of the connecting rod 122, and then measure the displacement distance of the connecting rod 122 along the second direction.

[0074] In this embodiment, refer to Figure 1 and Figure 3 The pressure adjustment assembly 13 includes an elastic pressure portion 132, a fixed base 133 and an adjustment kit 134. The fixed base 133 is located between the second sensor 142 and the roller 1211. The fixed base 133 surrounds the outer circumference of the connecting rod 122 and is fixedly connected to the connecting rod 122. The adjustment kit 134 is at least partially located in the first through hole 1421 and is connected to the side wall of the first through hole 1421 to connect the pressure adjustment assembly 13 to the displacement acquisition assembly 14. Figure 4The adjustment kit 134 is provided with a second through hole 131, and the adjustment kit 134 is sleeved on the outer periphery of the connecting rod 122 through the second through hole 131; optionally, the connecting rod 122 extends through the second through hole 131 to the side of the adjustment kit 134 away from the roller 1211. The elastic pressure portion 132 surrounds the outer periphery of the connecting rod 122 and is located between the fixed base 133 and the adjustment kit 134. The adjustment kit 134 can press down the elastic pressure portion 132, and the elastic pressure portion 132 presses down the fixed base 133, and then the fixed base 133 can apply a force along the second direction to the connecting rod 122, thereby ensuring the pressing effect of sealing the packaging bag.

[0075] In an optional embodiment, the second through hole 131 is coaxially arranged with the connecting rod 122, and the side wall of the second through hole 131 is spaced apart from the connecting rod 122, so that the connecting rod 122 can move along the second direction, avoiding the pressure adjustment assembly 13 from hindering the movement of the connecting rod 122 along the second direction.

[0076] In an optional embodiment, the second through hole 131 is coaxially arranged with the connecting rod 122, and the connecting rod 122 is slidingly connected to the side wall of the second through hole 131, so that the connecting rod 122 can move along the second direction relative to the adjustment kit 134 while ensuring that the rolling pressing assembly 12 has good stability.

[0077] In an optional embodiment, the fixed base 133 is an annular plate structure. For example, the fixed base 133 can be fixedly connected to the connecting rod 122 by welding, or by opening a threaded hole on the side wall of the fixed base 133 and using bolts to fix the fixed base 133 to the connecting rod 122, or the fixed base 133 can be fixedly connected to the connecting rod 122 by other suitable methods.

[0078] In an alternative embodiment, reference Figure 3 The elastic pressure part 132 is a spring, which surrounds the outer side of the connecting rod 122, and its two opposite ends along the second direction are respectively connected to the fixed base 133 and the adjustment kit 134. When the adjustment kit 134 moves toward the fixed base 133, the pressure of the elastic pressure part 132 on the fixed base 133 increases. When the adjustment kit 134 moves away from the fixed base 133, the pressure of the elastic pressure part 132 on the fixed base 133 decreases.

[0079] In an alternative embodiment, reference Figure 5The adjustment kit 134 includes a top cap 1341 and a bottom rod 1342 connected to each other. The bottom rod 1342 is located between the top cap 1341 and the elastic pressure portion 132. The bottom rod 1342 is at least partially located in the first through hole 1421. The top cap 1341 is located on the side of the second sensor 142 away from the roller 1211. The first through hole 1421 is a threaded hole. The outer peripheral surface of the bottom rod 1342 is provided with a thread. The bottom rod 1342 cooperates with the first through hole 1421, so that the adjustment kit 134 can be fixedly connected to the second sensor 142. By rotating the bottom rod 1342, the adjustment kit 134 can move along the second direction. Optionally, a through hole is provided on the side wall of the bottom rod 1342 to expose the connecting rod 122. The side wall of the bottom rod 1342 can be provided with one or more through holes to expose the connecting rod 122, so that the second sensor 142 can monitor the connecting rod 122 to obtain the first distance. By moving the adjustment kit 134 along the second direction, the pressure on the fixed base 133 can be adjusted, and then the pressure of the roller 1211 on the hot plate platform 11 can be adjusted to ensure the sealing quality of the packaging bag sealing and pressing device and improve the sealing effect of the packaging bag.

[0080] In an optional embodiment, a heat sealing strip 111 is further provided above the hot plate platform 11 for performing heat-pressure sealing operations on the opening of the packaging bag when the packaging bag is sealed and packaged.

[0081] The packaging bag sealing and pressing device provided in this embodiment can apply pressure to the rolling pressing component 12 by using the pressure adjustment component 13, and drive the rolling pressing component 12 to move by using the lateral movement component 15, thereby realizing secondary pressing of the packaging bag seal, improving the hot pressing sealing effect of the packaging bag seal, and by rotating the adjustment kit 134, it can control the pressure applied by the rolling pressing component 12 to the hot plate platform 11, thereby improving the secondary pressing effect of the packaging bag seal, and further improving the sealing effect of the packaging bag seal. At the same time, the displacement acquisition component 14 acquires the first distance, the second distance and the third distance during the pressing process. The above data can be used to detect and judge the sealing quality, thereby realizing the dual effects of improving the sealing quality of the packaging bag and detecting defects. In addition, the first sensor 141 can also acquire the roller rotation speed, realize the monitoring of the working state of the device, ensure the normal and stable movement of the equipment, and prevent the abnormal operation of the equipment from causing secondary damage to the seal.

[0082] Embodiment 2

[0083] This embodiment provides a packaging bag sealing defect detection method, using any packaging bag sealing and pressing device in the first embodiment to detect the sealing defects of the packaging bag, referring to Figure 6 and Figure 7 The packaging bag sealing defect detection method of this embodiment includes steps S1 to S8.

[0084] Step S1: adjusting the working state of the packaging bag sealing and pressing device.

[0085] Specifically, the posture of the packaging bag sealing and pressing device is adjusted so that the second direction is perpendicular to the upper surface of the hot plate platform 11, and the pressure adjustment component 13 is adjusted so that the rolling pressing component 12 of the packaging bag sealing and pressing device applies a preset first pressure to the hot plate platform 11.

[0086] In an optional embodiment, adjusting the working state of the packaging bag sealing and pressing device includes steps S11 to S14.

[0087] S11: adjusting the extending direction of the connecting rod so that the second direction is perpendicular to the upper surface of the hot plate platform; thereby enabling the packaging bag sealing and pressing device to press the hot plate platform 11 vertically.

[0088] S12: The second sensor of the displacement acquisition component is fixedly connected to the transverse slide rail; thereby, the transverse slide rail 151 can drive the rolling pressing component 12 to move along the first direction to achieve secondary pressing of the packaging bag seal.

[0089] S13: According to the preset first pressure, the pressure of the rolling pressing assembly on the hot plate platform is adjusted by the pressure regulating assembly. Specifically, the pressure of the pressure regulating assembly 13 on the connecting rod 122 is adjusted by rotating the regulating assembly 134 of the pressure regulating assembly 13, and then the pressure of the rolling pressing assembly 12 on the hot plate platform 11 is adjusted, so that the pressure value applied by the roller 1211 on the hot plate platform 11 is the first pressure, so as to ensure the secondary pressing effect of the packaging bag sealing pressing device. In actual applications, the value of the first pressure can be set according to actual processing needs.

[0090] S14: According to the preset first speed, the moving speed of the transverse slide rail along the first direction is set. By setting the moving speed of the transverse slide rail 151, it is possible to ensure that the rolling pressing assembly 12 presses the packaging bag seal at an appropriate speed, ensure the secondary pressing effect of the packaging bag sealing pressing device, and improve the sealing effect of the packaging bag seal. In actual applications, the value of the first speed can be adaptively set according to actual processing needs.

[0091] By adjusting and controlling the pressure of the roller 1211 on the hot plate platform 11, as well as the speed at which the roller 1211 moves, it is possible to effectively prevent situations such as over-pressing resulting from too slow a speed and / or too high a pressure, which results in a thin seal thickness, or under-pressing resulting from too fast a speed and / or too low a pressure, which results in a poor secondary pressing effect, thereby ensuring the secondary pressing effect of the packaging bag sealing and pressing device and improving the sealing effect and packaging yield of the packaging bag.

[0092] Step S2: placing the packaging bag on the hot plate platform 11 .

[0093] Specifically, the packaging bag is placed at the first preset position of the hot plate platform 11 and the sealing is kept flat, wherein the first preset position is a position on the hot plate platform 11 suitable for hot pressing and sealing operations. It should be noted that the present embodiment does not limit the order of performing step S1 and step S2, and step S1 and step S2 may be performed sequentially, or step S2 and step S1 may be performed sequentially.

[0094] Step S3: performing heat-compression sealing operation on the sealing of the packaging bag.

[0095] In this embodiment, refer to Figure 6 A heat sealing strip 111 is provided on the hot plate platform 11, and the heat sealing strip 111 is used to press the seal of the packaging bag to perform heat-pressure sealing on the packaging bag. After the heat-pressure sealing is completed, the heat sealing strip 111 is moved up and withdrawn to complete the heat-pressure sealing operation.

[0096] Step S4: Control the transverse slide rail 151 to move along the first direction to perform a secondary pressing operation on the sealing of the packaging bag.

[0097] In this embodiment, the transverse slide rail 151 is controlled to move in a first direction at a first speed, thereby driving the roller 1211 to move in the first direction. When the roller 1211 moves to the seal of the packaging bag, it can apply a first pressure to the seal of the packaging bag and maintain the first speed to move in the first direction, thereby achieving secondary pressing of the seal of the packaging bag.

[0098] In an optional embodiment, before controlling the transverse slide rail 151 to move along the first direction to perform a secondary pressing operation on the seal of the packaging bag, the following steps are also included: placing the packaging bag that has completed the hot pressure sealing operation at a second preset position so that the seal of the packaging bag is located in the travel direction of the roller 1211 for subsequent secondary pressing operation.

[0099] In an optional embodiment, the first preset position coincides with the second preset position, that is, the position of the packaging bag in the hot pressure sealing operation is the same as the position of the packaging bag in the secondary pressing operation, so there is no need to adjust the position of the packaging bag. After completing the hot pressure sealing operation, the secondary pressing operation can be carried out directly, thereby improving work efficiency.

[0100] Step S5: Obtain the first distance, the second distance and the third distance respectively.

[0101] In this embodiment, the first distance and the second distance are obtained by the displacement acquisition component 14, and the third distance is obtained by the lateral movement component 15. Specifically, the second distance is obtained by the first sensor 141, the first distance is obtained by the second sensor 142, and the third distance is obtained by the driving part 152 of the lateral movement component 15.

[0102] In an optional embodiment, after obtaining the first distance, the second distance, and the third distance, the following steps are further included: respectively obtaining the first moment information, the second moment information, and the third moment information; wherein the first moment information is the moment information corresponding to the first distance, the second moment information is the moment information corresponding to the second distance, and the third moment information is the moment information corresponding to the third distance, and the second moment information can be obtained through the first sensor 141, the first moment information can be obtained through the second sensor 142, and the third moment information can be obtained through the driving unit 152. Using the first moment information, the second moment information, and the third moment information, it is easy to obtain the corresponding relationship between the first distance, the second distance, and the third distance.

[0103] Step S6: Draw a motion curve diagram according to the first distance and the third distance.

[0104] In this embodiment, Figure 8 The motion curve diagram is schematically shown, which has the motion curve of the roller 1211. The motion curve is the motion trajectory of the roller 1211, which can reflect the ups and downs of the upper surface of the packaging bag seal. According to the ups and downs of the upper surface of the packaging bag after hot pressing, the sealing quality of the hot pressing sealing of the packaging bag can be judged.

[0105] In an optional embodiment, drawing a motion curve diagram according to the first distance and the third distance includes the following steps: using the first direction and the second direction as the x-axis and the y-axis respectively to establish a plane rectangular coordinate system; using the first distance and the third distance as the ordinate and the abscissa respectively, drawing a motion curve in the plane rectangular coordinate system to form a motion curve diagram. Optionally, the contact point between the roller 1211 and the hot plate platform 11 when the packaging bag sealing and pressing device is in the initial position before the movement can be used as the origin, and a plane rectangular coordinate system can be established according to the first direction and the second direction.

[0106] Step S7: Calculate the difference percentage using the second distance and the third distance.

[0107] Specifically, the difference percentage is the ratio of the difference between the second distance and the third distance to the third distance. In this embodiment, the second distance can be understood as the length of the movement distance of the roller 1211, that is, the curve length of the movement trajectory of the roller 1211. The third distance is the displacement distance of the roller 1211 along the first direction, and the value of the second distance is greater than or equal to the value of the third distance. The difference percentage can be used to determine the degree of undulations and wrinkles on the upper surface of the packaging bag seal.

[0108] Step S8: judging whether the packaging bag is poorly sealed according to the motion curve diagram and the difference percentage.

[0109] Specifically, when the ordinate in the motion curve diagram is too small or too large, or the difference percentage is too large, the packaging bag is judged to be poorly sealed. When the ordinate of the motion curve in the motion curve diagram is moderate and the difference percentage is small, the packaging bag is judged to be qualified.

[0110] In an optional embodiment, judging whether the packaging bag is poorly sealed is performed based on the motion curve diagram and the difference percentage, including steps S81 to S84.

[0111] S81: Based on the first distance, calculate the vertical center value. The vertical center value can be understood as the maximum possible value of the thickness of the packaging bag seal, or the average value of the thickness, etc. The actual thickness of the packaging bag seal fluctuates up and down along the vertical center value. Optionally, the vertical center value can be obtained by calculating the average value of the first distance, or the vertical center value can be obtained according to the average thickness of multiple similar packaging bag seals, or the vertical center value can be obtained by other acceptable methods.

[0112] S82: Using the preset upper limit coefficient and lower limit coefficient, calculate and obtain the vertical upper limit value and the vertical lower limit value.

[0113] Specifically, the vertical upper limit is denoted as s m , the vertical lower limit is recorded as s n , the vertical center value is recorded as s c , k m Denoted as the upper limit coefficient, k n Note that it is the lower limit coefficient, then the vertical upper limit value s m =k m *s c , vertical lower limit s n =k n *s c The vertical upper limit value can be understood as the maximum value of the allowable sealing thickness of the packaging bag, and the vertical lower limit value can be understood as the minimum value of the allowable sealing thickness of the packaging bag. The upper limit coefficient and the lower limit coefficient can be given based on the experience in actual production, or can also be calculated after testing the packaging bags that have completed heat-pressing sealing, or can also be given by other acceptable methods.

[0114] S83: Draw an upper reference line and a lower reference line in the motion curve diagram according to the vertical upper limit value and the vertical lower limit value. Fig. 9 , take the vertical upper limit value and the vertical lower limit value as the ordinate in the plane rectangular coordinate system, draw a straight line with the ordinate value of the vertical upper limit value as the upper reference line, and draw a straight line with the ordinate value of the vertical lower limit value as the lower reference line.

[0115] S84: Determine whether the difference percentage and the motion curve diagram meet the good product determination conditions.

[0116] In this embodiment, it is possible to determine whether the difference percentage and the motion curve diagram meet the good product determination condition based on the preset first difference threshold value and the upper reference line and the lower reference line.

[0117] In an optional embodiment, the good product judgment condition is that the difference percentage is less than a preset first difference threshold, and in the motion curve diagram, the motion curve corresponding to the seal of the packaging bag is located between the upper reference line and the lower reference line. Optionally, the first difference threshold can be, for example, 10%. When the good product judgment condition is met, the packaging bag after hot pressing is judged to be a good product; when the difference percentage is greater than or equal to the first difference threshold, it indicates that there are too many wrinkles on the upper surface of the packaging bag seal and rework is required, so the packaging bag is judged to be poorly sealed; when the motion curve corresponding to the seal of the packaging bag has a curve located above the upper reference line, it indicates that the seal of the packaging bag has problems such as serious wrinkles or insufficient hot pressing, which makes the thickness of the packaging bag seal large (see Fig. 9 When the motion curve corresponding to the sealing of the packaging bag has a curve below the lower reference line, it is believed that the sealing of the packaging bag has an excessive heat-pressing problem, resulting in a small sealing thickness of the packaging bag (see Fig. 9 Therefore, it is judged that the sealing of the packaging bag is poor.

[0118] The packaging bag sealing defect detection method provided in this embodiment uses the packaging bag sealing pressing device in the first embodiment to perform defect detection, and therefore also has the beneficial effects of the first embodiment. In addition, in this embodiment, by controlling the travel speed of the roller 1211 and the pressure of the roller 1211 on the hot pressing platform, the secondary pressing effect of the packaging bag sealing is effectively guaranteed, and the sealing effect and packaging yield of the packaging bag are improved. At the same time, the first to third distances are obtained during the pressing process, and the motion curve is drawn and the difference percentage is calculated. Based on the motion curve and the difference percentage, the sealing quality of the packaging bag can be effectively and intuitively judged, achieving the dual effects of improving the sealing quality of the packaging bag and defect detection, improving the accuracy of the sealing defect detection results, and achieving effective positioning of the sealing defect position.

[0119] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify, change or combine the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A packaging bag sealing and pressing device, characterized in that: It includes a hot plate platform, a rolling pressing component, a pressure regulating component, a displacement obtaining component and a lateral moving component; The rolling and pressing assembly is located on the hot plate platform, and comprises a pressing part and a connecting rod, one end of the connecting rod is connected to the pressing part, and the pressing part comprises a roller for pressing and sealing the packaging bag; The lateral movement assembly includes a lateral movement rail, which is arranged above the hot plate platform at intervals and can move along a first direction, wherein the first direction is an extension direction of the lateral movement rail and is parallel to the upper surface of the hot plate platform; The pressure adjustment component is sleeved on the outer circumference of the connecting rod and connected to the displacement acquisition component, and the pressure adjustment component can apply a force along a second direction to the connecting rod, wherein the second direction is an axial direction of the connecting rod; The displacement acquisition component is connected to the transverse slide rail so that the transverse slide rail drives the roller to move along the first direction. The displacement acquisition component is used to acquire a first distance and a second distance, wherein the first distance is the displacement of the connecting rod along the second direction, and the second distance is the rolling distance of the roller.

2. The packaging bag sealing and pressing device according to claim 1, characterized in that: The lateral movement assembly further includes a driving unit, which is used to drive the lateral movement rail to move along the first direction and output a third distance, where the third distance is a distance that the lateral movement rail moves along the first direction.

3. The packaging bag sealing and pressing device according to claim 1, characterized in that: The displacement acquisition component includes a first sensor and a second sensor; The first sensor is connected to the pressing part and is used to obtain the second distance and the roller speed; The second sensor is connected to the transverse slide rail and is used to obtain the first distance. A first through hole is provided in the second sensor and passes through the second direction. The connecting rod passes through the first through hole and extends to a side of the second sensor away from the roller.

4. The packaging bag sealing and pressing device according to claim 3, characterized in that: The pressure adjustment assembly includes an elastic pressure portion, a fixed base and an adjustment kit; The fixed base is located between the second sensor and the roller, and is fixedly connected to the outer circumference of the connecting rod; The adjustment kit is at least partially located in the first through hole and connected to the second sensor. A second through hole is formed in the adjustment kit, and the second through hole is coaxially arranged with the connecting rod. The elastic pressure portion surrounds the outer side of the connecting rod and is located between the fixed base and the adjustment kit. The adjustment kit can press down the elastic pressure portion to apply a force along the second direction to the connecting rod through the fixed base.

5. The packaging bag sealing and pressing device according to claim 4, characterized in that: The adjustment kit comprises a top cap and a bottom rod connected to each other, the top cap is located at a side of the second sensor away from the roller, and the bottom rod is located between the top cap and the elastic pressure portion; The first through hole is a threaded hole, and threads are arranged on the outer peripheral surface of the bottom rod, so that the adjustment kit is fixedly connected to the second sensor through the first through hole and can move along the second direction.

6. A method for detecting sealing defects of packaging bags, using the packaging bag sealing and pressing device according to any one of claims 1 to 5 to detect sealing defects of packaging bags, characterized in that: The following steps are involved: Adjusting the working state of the packaging bag sealing and pressing device; Place the package bag on the hot plate platform; Performing heat-pressure sealing operation on the sealing of the packaging bag; Controlling the transverse slide rail to move along a first direction to perform a secondary pressing operation on the sealing of the packaging bag; Obtain the first distance, the second distance and the third distance respectively; Draw a motion curve diagram according to the first distance and the third distance; Calculate the difference percentage using the second distance and the third distance; Whether the packaging bag is poorly sealed is determined based on the motion curve diagram and the difference percentage.

7. The packaging bag sealing defect detection method according to claim 6, characterized in that: Adjusting the working state of the packaging bag sealing and pressing device includes the following steps: Adjusting the extension direction of the connecting rod so that the second direction is perpendicular to the upper surface of the hot plate platform; The second sensor of the displacement acquisition assembly is fixedly connected to the transverse slide rail; According to a preset first pressure, adjusting the pressure of the rolling pressing assembly on the hot plate platform through the pressure adjusting assembly; According to a preset first speed, the moving speed of the transverse slide rail along the first direction is set.

8. The packaging bag sealing defect detection method according to claim 6, characterized in that: Drawing a motion curve diagram according to the first distance and the third distance includes the following steps: The first direction and the second direction are respectively used as the x-axis and the y-axis to establish a plane rectangular coordinate system; The motion curve is drawn in the plane rectangular coordinate system with the first distance and the third distance as the ordinate and the abscissa respectively, so as to form the motion curve graph.

9. The packaging bag sealing defect detection method according to claim 6, characterized in that: Judging whether the packaging bag is poorly sealed according to the motion curve diagram and the difference percentage includes the following steps: Based on the first distance, calculating a vertical center value; The vertical upper limit value and the vertical lower limit value are calculated by using the preset upper limit coefficient and the lower limit coefficient; wherein the vertical upper limit value s m =k m *s c , the vertical lower limit s n =k n *s c ,s c is the vertical center value, k m is the upper limit coefficient, k n is the lower limit coefficient; Draw an upper reference line and a lower reference line in the motion curve diagram according to the vertical upper limit value and the vertical lower limit value; It is determined whether the difference percentage and the motion curve diagram meet a good product determination condition.

10. The packaging bag sealing defect detection method according to claim 9, characterized in that: The good product determination condition is that the difference percentage is less than a preset first difference threshold, and in the motion curve diagram, the motion curve corresponding to the sealing of the packaging bag is located between the upper reference line and the lower reference line.

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