A method and system for controlling the application of adhesive to veneer in building formwork.
By dividing the production of building formwork into critical coverage areas and ordinary coverage areas, identifying abnormal working conditions and assessing the bonding state of veneer segments, and selecting appropriate paving treatment methods, the problem of inconsistent bonding state of veneer segments was solved, thereby improving the stability of the formwork and the consistency of the finished product.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LANGFANG XINGSHAN WOOD-PROCESSING CO LTD
- Filing Date
- 2026-04-03
- Publication Date
- 2026-06-30
AI Technical Summary
During the continuous production of building formwork, the bonding state of different veneer sections is inconsistent due to winding buffer and abnormal working conditions after veneer gluing. This is especially true in key areas such as areas near joints and veneer edges, where issues such as inconsistent bonding quality, unstable edge bonding, and insufficient consistency of finished products are likely to occur.
By collecting data on the joints and edges of the veneers, critical coverage areas and ordinary coverage areas are divided. Abnormal working conditions are identified and the bonding availability of veneer segments is assessed. Differentiated paving treatments, such as critical coverage, avoidance paving, or separation treatment, are selected to ensure stable bonding quality.
It improves the structural stability and edge quality of building formwork, enhances the quality control capability under continuous production conditions, reduces local bonding quality fluctuations, and increases the finished product qualification rate.
Smart Images
Figure CN122308292A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building formwork manufacturing control technology, and more specifically, to a method and system for controlling the application of adhesive to building formwork veneers. Background Technology
[0002] Construction formwork typically consists of multi-layered veneer structures laid in a crisscross pattern and then glued and pressed together. Its production process generally includes veneer pretreatment, gluing, assembly, pre-pressing, and hot pressing. As the requirements for surface quality, turnover rate, and structural stability of construction formwork continue to increase, production methods are gradually shifting from manual assembly to continuous and automated processes. Veneer unwinding, continuous laying, continuous pre-pressing, and hot pressing have become important development directions in the manufacturing of wood-based panels and construction formwork. These technologies are of practical significance for improving production efficiency, reducing reliance on manual labor, and stabilizing the basic quality of products.
[0003] In existing technologies, such as Chinese invention patent CN110509367A – a continuous plywood production line and its production process, the continuous production concept of unwinding, veneer placement, continuous pre-pressing, cutting, and hot pressing is disclosed, focusing on improving continuous production efficiency and wood utilization. However, in the actual production of building formwork, the veneer may still be affected by fluctuations in operating conditions such as speed reduction, line stoppage, and resumption of production during gluing, winding and buffering, unwinding, and subsequent laying. The gluing stability of different veneer segments in subsequent assembly is not completely consistent; especially in areas more sensitive to gluing quality, such as the veneer joint area and the board edge area, existing continuous production processes are still prone to problems such as local gluing quality fluctuations, unstable edge bonding, and insufficient consistency of finished product quality.
[0004] Therefore, it is necessary to design a method and system for controlling the application of adhesive to single-layer formwork in building templates to solve the problems existing in the current technology. Summary of the Invention
[0005] In view of this, the present invention proposes a method and system for controlling the gluing and laying of veneer in building formwork, which aims to solve the technical problems of inconsistent gluing states of different veneer segments caused by the winding buffer after veneer gluing and abnormal working condition fluctuations during the continuous production of building formwork, which in turn leads to fluctuations in the gluing quality of key areas, unstable edge bonding and insufficient consistency of finished products.
[0006] This invention proposes a method for controlling the application of adhesive to veneer in building formwork, comprising: Collect the joint position data and edge position data of the lower longitudinal stripe veneer, divide the joint position data and edge position data into regions, and obtain the key coverage area and the ordinary coverage area. A bio-based adhesive is applied to a cross-grained veneer and wound into a veneer roll. The operation data of the veneer roll during the winding, buffering and unwinding processes are collected. The operation data is used for anomaly identification and in-roll position correlation processing to obtain the affected veneer segments. Collect the elapsed time, radial layer position, cumulative pressure duration, and moisture content of each affected veneer segment from glue application to installation, and conduct a status assessment on the elapsed time, radial layer position, cumulative pressure duration, and moisture content to obtain the glue-usable state; Based on the coverage area to which the current paving area belongs and the adhesive availability status, a paving treatment method is selected. The paving treatment method includes implementing critical coverage paving for affected veneer segments in critical coverage status, implementing avoidance paving or normal coverage paving for affected veneer segments in normal coverage status, and implementing separation treatment for affected veneer segments in restricted access status. The completed paving slabs are pressed together to form a building template.
[0007] Furthermore, the anomaly identification includes identifying speed reduction events, line stop events, and production resumption events, and determining the length segment of the transverse veneer corresponding to the anomaly event based on the start and end times of the anomaly event and the corresponding winding speed.
[0008] Furthermore, the in-roll position association processing includes determining the radial layer position of the ribbed veneer length segment in the veneer roll based on the ribbed veneer length segment and the current roll diameter, and identifying the ribbed veneer length segment as the affected veneer segment.
[0009] Furthermore, the status assessment includes comparing the elapsed time, radial layer, cumulative pressure duration, and water content with the corresponding preset critical coverage area, preset ordinary coverage area, and preset restricted area, and classifying the adhesive usability status according to the comparison results.
[0010] Furthermore, when the elapsed time, radial layer position, cumulative pressure duration, and moisture content are all within a preset critical coverage range, the adhesive-usable state is determined to be a critical coverage state; when at least one of them exceeds the preset critical coverage range but all are within a preset normal coverage range, the adhesive-usable state is determined to be a normal coverage state; when any one of them is within a preset restricted area, the adhesive-usable state is determined to be a restricted area.
[0011] Furthermore, when selecting a paving method, the following should be considered: If the current paving area is a critical coverage area and the adhesive availability is critical coverage, then implement critical coverage paving; If the current paving area is a critical coverage area and the adhesive availability is normal coverage, then avoidance paving shall be implemented; If the current paving area is a normal coverage area and the adhesive availability status is critical coverage status or normal coverage status, then normal coverage paving shall be implemented; If the adhesive is in a restricted state, a cutting process is performed before entering the current paving area.
[0012] Furthermore, the avoidance paving includes adjusting at least one of the fixed-length cutting position of the cross-grain veneer and the paving start position, so that the affected veneer segment in the normal coverage state avoids the critical coverage area and enters the normal coverage area accordingly.
[0013] Furthermore, after avoiding the affected veneer segments in the normal coverage state, the critical coverage area is filled with unaffected veneer segments or affected veneer segments in the critical coverage state; after cutting off the affected veneer segments in the restricted access state, the current paving area is continued with unaffected veneer segments or affected veneer segments in the critical coverage state.
[0014] Furthermore, when performing supplementary paving in the key coverage area or continuing paving in the currently paved area, it includes: Determine whether there are any unaffected veneer segments within the preset unwinding length range after the currently affected veneer segment; if there are unaffected veneer segments, use the unaffected veneer segments for replacement or continuation paving; if there are no unaffected veneer segments, use the affected veneer segments that are in critical coverage status for replacement or continuation paving.
[0015] Compared with existing technologies, the advantages of this invention are as follows: By dividing the lower longitudinal veneer into critical coverage areas and ordinary coverage areas, and specifically mapping abnormal working conditions during winding, buffering, and unwinding to the corresponding affected veneer segments, and combining the time elapsed from gluing to installation, radial layer position, cumulative pressure duration, and moisture content of the affected veneer segments, the bonding usability of each affected veneer segment is assessed. Then, for different coverage areas and different bonding usability, critical coverage installation, avoidance installation, ordinary coverage installation, or separation treatment is selected. This allows veneer segments with more stable bonding to be preferentially used in areas near joints and near veneer edges, etc. By combining areas with higher strength sensitivity, veneer segments with reduced bonding strength but still usable are transferred to general areas for use, while veneer segments unsuitable for continued use are promptly cut off before entering the slab blank. This reduces local bonding quality fluctuations caused by slowdowns, line stops, and resumptions during continuous production, and minimizes problems such as weak joints, unstable edge bonding, local delamination, bubbling, and insufficient product consistency. At the same time, it balances the bonding reliability of critical areas with the material utilization rate of general areas, improving the structural stability, edge quality, and reusability of building formwork, while also enhancing quality control capabilities and product qualification rates under continuous production conditions.
[0016] On the other hand, this application also provides a veneer adhesive application and installation control system for building formwork, used to apply the above-mentioned veneer adhesive application and installation control method for building formwork, including: The acquisition unit is configured to acquire the joint position data and edge position data of the lower longitudinal stripe veneer, and to divide the joint position data and edge position data into regions to obtain key coverage areas and ordinary coverage areas. The processing unit is configured to apply a bio-based adhesive to the cross-ribbed veneer and wind it into a veneer roll, collect the running data of the veneer roll during the winding, buffering and unwinding process, perform anomaly identification and in-roll position correlation processing on the running data, and obtain the affected veneer segments. The evaluation unit is configured to collect the elapsed time, radial layer position, cumulative pressure duration and moisture content of each affected veneer segment from glue application to installation, and to evaluate the elapsed time, radial layer position, cumulative pressure duration and moisture content to obtain the glued usable state. The judgment unit is configured to select a paving treatment method based on the coverage area to which the current paving area belongs and the adhesive availability status. The paving treatment method includes implementing critical coverage paving for affected veneer segments in critical coverage status, implementing avoidance paving or normal coverage paving for affected veneer segments in normal coverage status, and implementing separation treatment for affected veneer segments in restricted access status. The execution unit is configured to press and shape the completed paved slabs to obtain building templates.
[0017] It is understandable that the above-mentioned methods and systems for controlling the application of adhesive to single-layer formwork in building templates have the same beneficial effects, and will not be elaborated further here. Attached Figure Description
[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart of a method for controlling the application of adhesive to building formwork panels according to an embodiment of the present invention; Figure 2 This is a functional block diagram of the building formwork single-panel adhesive application and laying control system provided in an embodiment of the present invention. Detailed Implementation
[0019] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0020] In some embodiments of this application, see Figure 1 As shown, this application proposes a method for controlling the application of adhesive to veneer in building formwork, including: S100: Collects joint location data and edge location data of the lower longitudinal veneer, divides the joint location data and edge location data into regions, and obtains key coverage areas and ordinary coverage areas.
[0021] S200: Apply bio-based adhesive to the cross-ribbed veneer and wind it into a veneer roll. Collect the running data of the veneer roll during the winding, buffering and unwinding process. Perform anomaly identification and in-roll position correlation processing on the running data to obtain the affected veneer segments.
[0022] S300: Collect the elapsed time, radial layer position, cumulative pressure duration, and moisture content of each affected veneer segment from glue application to installation, and conduct a condition assessment on the elapsed time, radial layer position, cumulative pressure duration, and moisture content to obtain the usable state of the adhesive.
[0023] S400: Select the paving treatment method based on the coverage area and the available bonding status of the current paving area. The paving treatment method includes implementing critical coverage paving for affected veneer sections in critical coverage status, implementing avoidance paving or normal coverage paving for affected veneer sections in normal coverage status, and implementing separation treatment for affected veneer sections in restricted access status.
[0024] S500: Press the completed paved slabs into shape to obtain building formwork.
[0025] Specifically, in this embodiment, the critical coverage area refers to the area on the lower longitudinally ribbed veneer where the bonding quality requirements are high, preferably including the area adjacent to the joint and the area adjacent to the edge of the veneer. The ordinary coverage area is the area other than the critical coverage area. The area division can be completed by the control system based on the joint position data and the veneer edge position data. Preferably, the preset ranges on both sides of the joint and the preset ranges on the inner side of the veneer edge are divided into critical coverage areas, and the remaining areas are divided into ordinary coverage areas. By dividing the lower longitudinally ribbed veneer into areas, a regional basis can be provided for the differentiated paving of the subsequent transversely ribbed veneer.
[0026] In a preferred embodiment, the area within 30 mm on each side of the joint centerline is designated as the critical coverage area. The area extending 20 mm inward from the board edge is also designated as the critical coverage area, with the remaining area designated as the general coverage area. The width of the critical coverage area can be determined based on the thickness of the longitudinal veneer, the target template thickness, and the required bonding strength.
[0027] In this embodiment, the bio-based adhesive is preferably an adhesive system based on starch derivatives or natural polysaccharides. After the cross-grain veneer is glued, it is wound into a veneer roll, and operational data is continuously collected during winding, buffering, and unwinding. The operational data preferably includes winding speed, unwinding speed, start / stop status, and roll diameter changes. Anomaly identification is performed on the operational data to determine if any fluctuations in the working conditions affecting the bonding state have occurred. After anomaly identification, in-roll position correlation processing is performed to determine the affected veneer segments corresponding to the abnormal working conditions.
[0028] In some embodiments, winding speed, unwinding speed, roll diameter changes, and start / stop status are continuously collected according to a preset sampling period, preferably 0.1 seconds to 1 second. For moisture-containing conditions, data can be acquired before installation according to the same sampling period or according to the detection cycle of a single cross-ribbed veneer. To reduce the impact of instantaneous fluctuations on anomaly identification results, the control system can perform moving average, anomaly removal, or continuous periodic confirmation processing on the continuously collected data before performing anomaly identification and status assessment.
[0029] Furthermore, anomaly identification includes identifying deceleration events, line stoppage events, and production resumption events. The control system determines the cross-ribbed veneer length segment corresponding to the anomaly event based on the start and end times of the event and the corresponding winding speed during the anomaly. The cross-ribbed veneer length segment characterizes the range of cross-ribbed veneers that may experience changes in bonding performance under abnormal operating conditions. After determining the cross-ribbed veneer length segment corresponding to the anomaly event, it is then combined with the current roll diameter for in-roll position correlation processing.
[0030] In some embodiments, when the length segments of the cross-ribbed veneer corresponding to multiple abnormal events overlap, or the interval between two adjacent cross-ribbed veneer length segments is less than a preset merging length, the corresponding segments can be merged and determined as the same affected veneer segment. This avoids frequent switching of subsequent state assessments and paving decisions due to excessively fine segmentation of abnormal events. The preset merging length is preferably determined based on the fixed-length cutting accuracy, paving positioning accuracy, and minimum cuttable length, for example, it can be 50 mm to 300 mm.
[0031] In a preferred embodiment, a speed reduction event is determined when the winding speed is lower than 70% to 90% of the target winding speed for 2 to 10 seconds. A production stop event is determined when the winding speed drops to zero or is lower than 5% of the target winding speed for 5 to 60 seconds. A production resumption event is determined when the winding speed recovers to 90% to 110% of the target winding speed for 3 to 20 seconds. The length segment of the ribbed veneer is calculated based on the duration of the abnormal event and the corresponding winding speed, or directly determined based on the production line length record information. When the winding speed changes continuously during the abnormal period, the length segment of the ribbed veneer is preferably calculated by accumulating the winding speed at each sampling time during the abnormal period with the corresponding sampling interval. When the production line is equipped with a length encoder or a cumulative length recording device, the length segment of the ribbed veneer can also be determined directly based on the cumulative length change recorded.
[0032] The in-roll position correlation processing includes determining the radial layer position of the ribbed veneer length segment within the veneer roll based on the ribbed veneer length segment and roll diameter information, and identifying the ribbed veneer length segment as the affected veneer segment. The roll diameter information refers to the roll diameter at the correlation processing point corresponding to the ribbed veneer length segment. Preferably, this is the roll diameter information when the ribbed veneer length segment corresponding to the abnormal event is completed being wound in, the real-time roll diameter information before unwinding to the ribbed veneer length segment, or the equivalent roll diameter information calculated based on the winding length, veneer thickness, and core size. The current roll diameter can be directly obtained through a roll diameter detection device, or it can be estimated by combining the cumulative winding length value with the veneer thickness and core size. The radial layer position is used to characterize the roll layer position of the affected veneer segment within the veneer roll. Different radial layers correspond to different pressure conditions and environmental exposure conditions, thus providing a basis for subsequent condition assessment.
[0033] In this embodiment, the control system continues to collect the elapsed time, radial layer position, cumulative pressure duration, and moisture content of each affected veneer segment from glue application to paving, and performs a status assessment based on the above parameters. The elapsed time is preferably the time interval between the completion of glue application for the affected veneer segment and the entry of the affected veneer segment into the paving station. The glue application time can be determined by the timestamp record of the affected veneer segment passing through the glue application device, and the entry into the paving station can be determined by the timestamp record of the affected veneer segment reaching the fixed-length cutting position or the paving start position. The cumulative pressure duration is preferably the cumulative duration from the start of the affected veneer segment being wound into the veneer roll and in a coiled state of compression until the affected veneer segment is unwound and released from the coil constraint. The cumulative pressure duration can be calculated based on the winding start time, buffer duration, stop duration, unwinding arrival time, and coil release time. The moisture content is preferably the moisture level of the affected veneer segment before installation, and is preferably expressed as moisture content. It can be obtained through an online moisture content detection device, or it can be estimated by correction based on the moisture content before adhesive application, the amount of moisture added by adhesive application, ambient temperature and humidity, and the buffer time. Radial layer position, time passed, cumulative pressure duration, and moisture content are all important factors affecting bonding performance.
[0034] The condition assessment involves comparing elapsed time, radial layer position, cumulative pressure duration, and moisture content with corresponding preset critical coverage areas, preset general coverage areas, and preset restricted areas, respectively, and classifying the adhesive's usable condition based on the comparison results. The preset critical coverage areas, preset general coverage areas, and preset restricted areas can be pre-set based on adhesive performance test results, veneer material characteristics, and production line process verification results. By comparing these preset ranges, a standardized assessment of the adhesive condition of affected veneer segments can be achieved.
[0035] In a preferred embodiment, a time elapsed between 0 and 8 minutes is included in a preset critical coverage area; a time elapsed greater than 8 minutes but not exceeding 15 minutes is included in a preset normal coverage area; and a time elapsed greater than 15 minutes is included in a preset prohibited area. Affected veneer segments located within 40% of the radial radius of the outer layer of the veneer roll are included in a preset critical coverage area; located within 30% of the radial radius of the middle layer are included in a preset normal coverage area; and located within 30% of the radial radius of the inner layer near the core are included in a preset prohibited area. Cumulative pressure duration between 0 and 6 minutes is included in a preset critical coverage area; greater than 6 minutes but not exceeding 12 minutes are included in a preset normal coverage area; and greater than 12 minutes are included in a preset prohibited area. Moisture content is preferably expressed as moisture percentage; a moisture content between 6% and 10% is included in a preset critical coverage area; a moisture content between 4% and 14% is included in a preset normal coverage area; and a moisture content below 4% or above 14% is included in a preset prohibited area. The radial ranges of the outer, middle, and inner layers are defined based on the total radial thickness from the outer surface of the veneer roll to the core.
[0036] In some embodiments, the aforementioned preset critical coverage area, preset general coverage area, and preset prohibited area are not fixed values, but are determined by calibration based on the open usable time of the bio-based adhesive used, veneer thickness, initial moisture content of the veneer, winding tension, target template thickness, ambient temperature and humidity, and hot pressing process conditions, through tensile shear strength tests, immersion peel tests, and statistical results of finished product edge quality during trial production. Preferably, several combinations of time, radial layer position, cumulative compression time, and moisture content can be selected for testing. The bonding strength, edge delamination rate, and appearance defect rate after pressing under each combination are statistically analyzed. The parameter range that meets the bonding requirements of the critical area is determined as the preset critical coverage area, the parameter range that meets the usage requirements of the general area but not the requirements of the critical area is determined as the preset general coverage area, and the parameter range that does not meet the usage requirements of the current slab is determined as the preset prohibited area. For different tree species veneers, different adhesive systems, or different seasonal environmental conditions, recalibration or parameter correction based on historical production data can be performed.
[0037] Furthermore, when the elapsed time, radial layer position, cumulative pressure duration, and moisture content are all within the preset critical coverage range, the bonding usable state is determined to be a critical coverage state. When at least one of these factors exceeds the preset critical coverage range but all are within the preset normal coverage range, the bonding usable state is determined to be a normal coverage state. When any one of these factors is within the preset prohibited range, the bonding usable state is determined to be a prohibited state. Through the above classification determination, the affected veneer segments can be divided into different states: suitable for critical coverage areas, suitable for normal coverage areas, and unsuitable for entering the current slab.
[0038] In this embodiment, the corresponding paving process is selected based on the coverage area to which the current paving area belongs and the available bonding status. The current paving area refers to the target material drop area where the current horizontal veneer segment to be paved falls onto the lower vertical veneer according to the current fixed-length cutting position and paving start position. The control system matches the expected start and end positions of the current horizontal veneer segment to be paved in the paving direction with the boundaries of the critical coverage area and the ordinary coverage area to determine the coverage area to which the current paving area belongs. Preferably, when the target material drop area corresponding to the current horizontal veneer segment to be paved overlaps with the critical coverage area, the target material drop area is determined to be the paving situation corresponding to the critical coverage area. When the target material drop area corresponding to the current horizontal veneer segment to be paved does not overlap with the critical coverage area, the target material drop area is determined to be the paving situation corresponding to the ordinary coverage area. It should be noted that critical coverage area and normal coverage area are used to characterize the area category on the underlying longitudinal veneer, while critical coverage status, normal coverage status, and restricted entry status are used to characterize the glue availability of the affected veneer segment. These correspond to area attributes and veneer segment status attributes, respectively. Specifically, if the current paving area is a critical coverage area and the glue availability status is critical coverage, then critical coverage paving is implemented. If the current paving area is a critical coverage area and the glue availability status is normal coverage, then avoidance paving is implemented. If the current paving area is a normal coverage area and the glue availability status is either critical coverage or normal coverage, then normal coverage paving is implemented. If the glue availability status is restricted entry, then a separation process is performed before entering the current paving area.
[0039] Critical coverage paving refers to paving affected veneer segments in critical coverage areas within critical coverage zones. Normal coverage paving refers to paving affected veneer segments in either critical or normal coverage areas within normal coverage areas. Cut-off processing refers to removing affected veneer segments in a restricted-entry state from the paving chain before they enter the current paving area. Avoidance paving includes adjusting at least one of the fixed-length cut position of the cross-grain veneer and the paving start position to ensure that affected veneer segments in normal coverage avoid critical coverage areas and enter the corresponding normal coverage areas. Unaffected veneer segments can directly participate in regular paving according to the area category of the current paving area. When an unaffected veneer segment corresponds to a critical coverage area, it can be preferentially used for critical coverage paving. When an unaffected veneer segment corresponds to a normal coverage area, it can be used for normal coverage paving.
[0040] In a preferred embodiment, at least one of the adjustment amount of the fixed-length cutting position and the adjustment amount of the paving start position is determined based on the relative position of the affected veneer segment within the currently paved cross-ribbed veneer segment, the width of the critical coverage area, and the allowable paving offset, and at least ensures that the affected veneer segment in the normal coverage state does not overlap with the critical coverage area. Preferably, the adjustment amount does not exceed 20% of the target length of a single cross-ribbed veneer to ensure that the affected veneer segment in the normal coverage state avoids the critical coverage area and does not affect the continuous paving of the current slab.
[0041] In this embodiment, after avoiding paving on affected veneer segments in normal coverage, unaffected veneer segments or affected veneer segments in critical coverage are used to fill in the gaps in the critical coverage area. After cutting off affected veneer segments in restricted coverage, unaffected veneer segments or affected veneer segments in critical coverage are used to continue paving in the current paved area. By setting up fill-in and continuous paving, the paving continuity and quality integrity of the critical coverage area and the current paved area can be guaranteed. Unaffected veneer segments refer to veneer segments that do not fall within the cross-ribbed veneer length section corresponding to the abnormal event and are not identified as affected veneer segments.
[0042] Furthermore, when performing supplementary paving in critical coverage areas or continuing paving in the current paving area, it is first determined whether there are unaffected veneer segments within the preset unwinding length range after the currently affected veneer segment. If unaffected veneer segments exist, they are used for supplementary or continued paving. If no unaffected veneer segments exist, the affected veneer segments in critical coverage are used for supplementary or continued paving. The preset unwinding length range can be set based on the unwinding speed, control system response time, and paving execution time. This selection order allows for priority use of veneer segments with more stable quality for supplementary or continued paving.
[0043] In a preferred embodiment, the preset unwinding length range is the veneer length corresponding to the control system's completion of detection, judgment, switching, cutting adjustment, and paving execution at the current unwinding speed. The preset unwinding length range should at least cover the unwinding length required by the control system from identifying the currently affected veneer segment to completing the replacement paving or continuation paving command. Preferably, the preset unwinding length range is 500 mm to 1500 mm, or the target paving length of 1 to 3 cross-grained veneers.
[0044] In this embodiment, the completed paved slabs are pressed together to obtain a building template. Pressing can be achieved using pre-pressing and hot-pressing processes. In a preferred embodiment, the pre-pressing pressure is 0.4 MPa to 1.0 MPa, and the pre-pressing time is 20 to 120 seconds. The hot-pressing temperature is 110 to 140 degrees Celsius, the hot-pressing pressure is 0.8 MPa to 1.5 MPa, and the hot-pressing time is 180 to 600 seconds. Specific parameters can be adjusted according to the thickness of the horizontal veneer, the thickness of the vertical veneer, the total thickness of the slab, and the curing characteristics of the bio-based adhesive. Because differentiated paving treatment has been performed before pressing based on the adhesive availability of the affected veneer segments and the paving area category, the resulting building template achieves more stable adhesive quality in areas near joints, near slab edges, and in ordinary areas.
[0045] The following example further illustrates this application. In continuous production, the control system first divides the critical coverage area and the normal coverage area based on the joint position data and edge position data of the lower longitudinal veneer. Subsequently, bio-based adhesive is applied to the transverse veneer, and it is wound to form a veneer roll. During winding and buffering, if a speed-down event or a stoppage event occurs on the production line, the control system records the start and end times of the abnormal event and the corresponding winding speed, determines the transverse veneer length segment corresponding to the abnormal event, and determines the radial layer position of the transverse veneer length segment by combining the roll diameter information corresponding to that segment, thereby obtaining the affected veneer segment. Then, the status of each affected veneer segment is assessed based on the elapsed time, radial layer position, cumulative pressure duration, and moisture content, classifying them into critical coverage status, normal coverage status, or prohibited status. For affected veneer segments located in the critical coverage area and in the critical coverage status, critical coverage installation is directly implemented. For affected veneer sections located in critical coverage areas but under normal coverage, avoidance paving will be implemented, and they will be replaced by unaffected veneer sections or affected veneer sections under critical coverage. For affected veneer sections under restricted access conditions, separation will be implemented, and they will be replaced by veneer sections that meet the requirements. For affected veneer sections located in normal coverage areas and under either critical or normal coverage, normal coverage paving will be implemented. After paving is completed, the veneers will be pre-compressed and hot-compressed to form the building formwork.
[0046] Through the above implementation methods, the requirements of the lower layer area, the impact of abnormal working conditions, and the evaluation of the bonding status of veneer segments can be combined under continuous production conditions. This avoids laying veneer segments with unsuitable bonding status in critical coverage areas, reduces the risk of bonding quality fluctuations, unstable edge bonding, and insufficient product consistency in critical areas, and improves the utilization rate of veneer segments in normal condition and the continuity of the production process.
[0047] Based on another preferred embodiment described above, see [link to preferred embodiment]. Figure 2As shown, this embodiment provides a veneer adhesive application and installation control system for building formwork, used to apply the above-described veneer adhesive application and installation control method for building formwork, including: The acquisition unit is configured to acquire joint position data and edge position data of the lower longitudinal stripe veneer, divide the joint position data and edge position data into regions, and obtain key coverage areas and ordinary coverage areas.
[0048] The processing unit is configured to apply a bio-based adhesive to the cross-ribbed veneer and wind it into a veneer roll, collect the running data of the veneer roll during the winding, buffering and unwinding process, perform anomaly identification and in-roll position correlation processing on the running data, and obtain the affected veneer segments.
[0049] The evaluation unit is configured to collect the elapsed time, radial layer position, cumulative pressure duration, and moisture content of each affected veneer segment from glue application to installation, and to evaluate the elapsed time, radial layer position, cumulative pressure duration, and moisture content to obtain the usable state of the adhesive.
[0050] The judgment unit is configured to select a paving treatment method based on the coverage area to which the current paving area belongs and the adhesive availability status. The paving treatment methods include implementing critical coverage paving for affected veneer segments in critical coverage status, implementing avoidance paving or normal coverage paving for affected veneer segments in normal coverage status, and implementing separation treatment for affected veneer segments in restricted access status.
[0051] The execution unit is configured to press and shape the completed paved slabs to obtain building templates.
[0052] It is understandable that the above-mentioned methods and systems for controlling the application of adhesive to single-layer formwork in building templates have the same beneficial effects, and will not be elaborated further here.
[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the present invention.
Claims
1. A method for controlling the application and installation of adhesive on veneer for building formwork, characterized in that, include: Collect the joint position data and edge position data of the lower longitudinal stripe veneer, divide the joint position data and edge position data into regions, and obtain the key coverage area and the ordinary coverage area. A bio-based adhesive is applied to a cross-grained veneer and wound into a veneer roll. The operation data of the veneer roll during the winding, buffering and unwinding processes are collected. The operation data is used for anomaly identification and in-roll position correlation processing to obtain the affected veneer segments. Collect the elapsed time, radial layer position, cumulative pressure duration, and moisture content of each affected veneer segment from glue application to installation, and conduct a status assessment on the elapsed time, radial layer position, cumulative pressure duration, and moisture content to obtain the glue-usable state; Based on the coverage area to which the current paving area belongs and the adhesive availability status, a paving treatment method is selected. The paving treatment method includes implementing critical coverage paving for affected veneer segments in critical coverage status, implementing avoidance paving or normal coverage paving for affected veneer segments in normal coverage status, and implementing separation treatment for affected veneer segments in restricted access status. The completed paving slabs are pressed together to form a building template.
2. The method for controlling the application of adhesive to single-layer formwork panels according to claim 1, characterized in that, The anomaly identification includes identifying speed reduction events, line stop events, and production resumption events, and determining the length segment of the transverse veneer corresponding to the anomaly event based on the start and end times of the anomaly event and the corresponding winding speed.
3. The method for controlling the application of adhesive to single-layer formwork panels according to claim 2, characterized in that, The in-roll position association processing includes determining the radial layer position of the ribbed veneer length segment in the veneer roll based on the ribbed veneer length segment and the current roll diameter, and identifying the ribbed veneer length segment as the affected veneer segment.
4. The method for controlling the application of adhesive to single-layer formwork panels according to claim 1, characterized in that, The status assessment includes comparing the elapsed time, radial layer, cumulative pressure duration, and water content with the corresponding preset critical coverage area, preset ordinary coverage area, and preset restricted area, and classifying the adhesive usability status according to the comparison results.
5. The method for controlling the application of adhesive to single-layer formwork panels according to claim 4, characterized in that, When the elapsed time, radial layer, cumulative pressure duration, and moisture content are all within the preset critical coverage range, the adhesive-usable state is determined to be a critical coverage state; when at least one of them exceeds the preset critical coverage range but all are within the preset normal coverage range, the adhesive-usable state is determined to be a normal coverage state; when any one of them is within the preset restricted area, the adhesive-usable state is determined to be a restricted area.
6. The method for controlling the application of adhesive to single-layer formwork panels according to claim 5, characterized in that, When selecting a paving method, the following should be included: If the current paving area is a critical coverage area and the adhesive availability is critical coverage, then implement critical coverage paving; If the current paving area is a critical coverage area and the adhesive availability is normal coverage, then avoidance paving shall be implemented; If the current paving area is a normal coverage area and the adhesive availability status is critical coverage status or normal coverage status, then normal coverage paving shall be implemented; If the adhesive is in a restricted state, a cutting process is performed before entering the current paving area.
7. The method for controlling the application of adhesive to single-layer formwork panels according to claim 6, characterized in that, The avoidance paving includes adjusting at least one of the fixed-length cutting position of the cross-grain veneer and the starting position of the paving, so that the affected veneer segment in the normal coverage state avoids the critical coverage area and enters the normal coverage area accordingly.
8. The method for controlling the application of adhesive to single-layer formwork panels according to claim 7, characterized in that, After avoiding the affected veneer segments in the normal coverage state, the critical coverage area is filled with unaffected veneer segments or affected veneer segments in the critical coverage state; after cutting off the affected veneer segments in the restricted access state, the current paving area is continued with unaffected veneer segments or affected veneer segments in the critical coverage state.
9. The method for controlling the application of adhesive to single-layer formwork panels according to claim 8, characterized in that, When performing supplementary paving in the critical coverage area or continuing paving in the currently paved area, the following is included: Determine whether there are any unaffected veneer segments within the preset unwinding length range after the currently affected veneer segment; if there are unaffected veneer segments, use the unaffected veneer segments for replacement or continuation paving; if there are no unaffected veneer segments, use the affected veneer segments that are in critical coverage status for replacement or continuation paving.
10. A veneer adhesive application and installation control system for building formwork, used in applying the veneer adhesive application and installation control method for building formwork as described in any one of claims 1-9, characterized in that, include: The acquisition unit is configured to acquire the joint position data and edge position data of the lower longitudinal stripe veneer, and to divide the joint position data and edge position data into regions to obtain key coverage areas and ordinary coverage areas. The processing unit is configured to apply a bio-based adhesive to the cross-ribbed veneer and wind it into a veneer roll, collect the running data of the veneer roll during the winding, buffering and unwinding process, perform anomaly identification and in-roll position correlation processing on the running data, and obtain the affected veneer segments. The evaluation unit is configured to collect the elapsed time, radial layer position, cumulative pressure duration and moisture content of each affected veneer segment from glue application to installation, and to evaluate the elapsed time, radial layer position, cumulative pressure duration and moisture content to obtain the glued usable state. The judgment unit is configured to select a paving treatment method based on the coverage area to which the current paving area belongs and the adhesive availability status. The paving treatment method includes implementing critical coverage paving for affected veneer segments in critical coverage status, implementing avoidance paving or normal coverage paving for affected veneer segments in normal coverage status, and implementing separation treatment for affected veneer segments in restricted access status. The execution unit is configured to press and shape the completed paved slabs to obtain building templates.