Bending and forming device and forming method for binding process of multi-size cardboard containers

Abstract

The present invention provides a bending and forming device and forming method for a multi-size cardboard container binding process, the device includes a main frame, a multi-size caliper mechanism, a material conveying mechanism and a plurality of flexible execution units; the multi-size caliper mechanism and the material conveying mechanism are both installed on the upper crossbeam of the main frame, the multi-size caliper mechanism is arranged directly above the material conveying mechanism, and a plurality of flexible execution units are arranged in pairs on the middle crossbeam of the main frame and located at the bottom of the cardboard used to make the container, and the same group of flexible execution units corresponds to a group of forming fixtures; the material conveying mechanism receives and conveys the cardboard used to make the container from the multi-size caliper mechanism through the plurality of groups of flexible execution units in sequence, and the forming fixtures on the flexible execution units cooperate with the multi-size caliper mechanism to bend and form the cardboard used to make the container. The present invention can realize precise bending and forming operations for box-making cardboard with a comprehensive size within the range of 700-2000mm.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging, and in particular relates to a bending and forming device and a forming method for a binding process of multi-size paperboard containers. Background Art

[0002] As a service manufacturing industry, the packaging industry is an important support for the national economy and social development. Today, my country has become the world's second largest producer and consumer of packaging products. The overall annual revenue of the packaging industry is approaching 2 trillion yuan. One of the main businesses of the industry, the "paper and paperboard containers" sector, generates nearly 400 billion yuan in annual revenue, accounting for 20% of the total output value, far higher than other sub-businesses. After years of development, the good packaging effect of paperboard containers has been widely recognized and praised by the market and users, and the scope of business involved is becoming more and more extensive, detailed and in-depth. For paperboard container manufacturers, as orders increase, they are also faced with higher and higher quality and precision requirements in terms of quality, size, specifications, etc. in container production and binding.

[0003] This is both an opportunity and a challenge. The reason is that most cardboard container manufacturers produce and use existing processing equipment on the market by purchasing and introducing it. They do not have the ability to design, develop and technically transform the equipment, and the original accuracy of the processing equipment that has been put into production determines and limits the accuracy of the processed products. This means that in order to further improve the quality of cardboard containers, the effective way to choose is often to purchase new equipment from equipment manufacturers or to carry out large-scale transformation of old machines. However, the price of a single automatic cardboard container binding line on the market is generally around 1 million, and the price of internationally renowned brands has reached 2 million. If this approach is chosen, it will undoubtedly greatly increase the operating costs and burden of the enterprise, which is unbearable for most small and medium-sized cardboard container manufacturers. Therefore, although corporate decision makers can fully recognize the development trend of the market and the future direction of the industry, they can't help sighing in despair and feeling powerless in the face of the pressure caused by huge expenses. Summary of the invention

[0004] In view of this, the present invention aims to propose a bending and forming device for the binding process of multi-sized cardboard containers and a supporting forming method, which has the characteristics of low cost and high precision and is suitable for the bending and forming operations of corrugated cardboard required for the production of large quantities of multi-sized cardboard containers.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A bending and forming device for a binding process of a multi-size cardboard container, comprising a main frame including an upper beam, a middle beam and a lower beam, a multi-size caliper mechanism, a material conveying mechanism and a plurality of flexible execution units;

[0007] The multi-size caliper mechanism is installed on the upper crossbeam of the main frame and is used to adjust the forming reference of the paperboard used to make the container; the material conveying mechanism is installed on the upper crossbeam of the main frame, and the multi-size caliper mechanism is arranged directly above the material conveying mechanism. Multiple flexible execution units are arranged in pairs on the middle crossbeam of the main frame and are located at the bottom of the paperboard used to make the container. The same group of flexible execution units corresponds to a group of forming fixtures; the two flexible execution units of the same group of flexible execution units are respectively arranged on the front and rear sides of the paperboard used to make the container;

[0008] The material conveying mechanism receives and conveys the cardboard used to make the container from the multi-size caliper mechanism through multiple groups of flexible execution units in sequence. The forming fixtures on the flexible execution units cooperate with the multi-size caliper mechanism to bend and shape the cardboard used to make the container.

[0009] Further, the flexible execution unit is a multi-link forming structure, including a bent link, a central connecting axis C, a central connecting axis B, a left short link, a right short link, a left long link, a right long link, a central connecting axis A, a central connecting axis, a central connecting axis D, a left transition link, a right transition link, a left connecting axis B, a right connecting axis B, a left base, a right base, a left connecting axis A, a right connecting axis A, a driven gear fan, a driving gear and a servo reduction motor;

[0010] The servo reduction motor is fixed on the lower crossbeam of the main frame, and the output shaft of the servo reduction motor is connected to the driving gear;

[0011] The center planes of the driving gear, the driven gear sector, the central connecting rod and the bent connecting rod are located in the same vertical plane, and this vertical plane is the symmetric center plane of the multi-connecting rod forming structure;

[0012] The left base and the right base are placed symmetrically with respect to the symmetric center plane of the multi-link forming structure, and are fixed on the middle crossbeam of the main frame;

[0013] The left long connecting rod and the right long connecting rod are respectively fixedly connected to the left connecting shaft A and the right connecting shaft A through the holes in their middle and lower parts, and are respectively connected to the shaft holes at the lower parts of the left base and the right base through the left connecting shaft A and the right connecting shaft A;

[0014] The driven gear fan is located between the left long connecting rod and the right long connecting rod. The driven gear fan is fixedly installed with the holes at the bottom of the left long connecting rod and the right long connecting rod through its own holes, and drives the left long connecting rod to rotate around the left connecting axis A in the shaft hole at the bottom of the left base through meshing with the driving gear, and drives the right long connecting rod to rotate around the right connecting axis A in the shaft hole at the bottom of the right base at the same time;

[0015] The left long connecting rod and the right long connecting rod are fixedly connected to the two ends of the central connecting shaft A through the holes in their upper and middle parts, and the middle part of the central connecting shaft A is connected to the shaft hole at the tail end of the central connecting rod;

[0016] The left long connecting rod and the right long connecting rod are fixedly connected to the two ends of the central connecting shaft B through the holes on their tops, and the middle of the central connecting shaft B is connected to the tail end shaft hole of the bent connecting rod;

[0017] The first end axial hole of the bent connecting rod is connected to the middle of the central connecting axis C, and the two ends of the central connecting axis C are respectively fixedly installed with the first end holes of the left short connecting rod and the right short connecting rod;

[0018] The left short connecting rod and the right short connecting rod are fixedly connected to the central connecting shaft D through their respective tail end holes, the middle of the central connecting shaft D is connected to the head end shaft hole of the central connecting rod, and the two ends of the central connecting shaft D are respectively connected to the head end shaft holes of the left transition connecting rod and the right transition connecting rod; the left short connecting rod and the right short connecting rod are symmetrically arranged on both sides of the head end shaft hole of the central connecting rod;

[0019] The left transition connecting rod and the right transition connecting rod are fixedly connected to the left connecting shaft B and the right connecting shaft B through their respective tail end holes and are connected to the shaft holes on the upper parts of the left base and the right base through the left connecting shaft B and the right connecting shaft B respectively.

[0020] Further, the multi-size caliper mechanism includes two parallel bridge beams, a frame longitudinal beam, a rack caliper A and a rack caliper B, the frame longitudinal beam includes a longitudinal beam and a plurality of vertical frames fixedly arranged at the lower part of the longitudinal beam, two parallel bridge beams are respectively fixedly arranged at the left and right ends of the longitudinal beam, the two bridge beams are fixedly installed on the upper beam of the main frame, and two rack calipers are arranged in parallel on the front and rear sides of the longitudinal beam;

[0021] The rack caliper A and the rack caliper B have the same structure and both include a caliper structure, a rack structure and a slide rail structure. The slide rail structure and the rack structure of each rack caliper form a sliding pair with the corresponding vertical frame of the frame-type longitudinal beam, and each of the rack structures is meshed with the corresponding servo gear. Driven by the corresponding servo motors, the rack caliper A and the rack caliper B are driven to move as a whole along the sliding pair to adjust the lateral spacing between the two caliper structures.

[0022] Furthermore, the rack structure and the slide rail structure are arranged along the length direction of their respective caliper structures, and the rack structure and the slide rail structure are arranged in parallel, the plurality of vertical frames include four narrow frames and two wide frames, and the four narrow frames are arranged in groups of two, the two groups of narrow frames are arranged crosswise with the two wide frames, the slide rail structure of the two rack calipers is slidably arranged in one group of narrow frames, the rack structure of the two rack calipers is slidably arranged in the other group of narrow frames, and the two servo motors are respectively installed in the two wide frames.

[0023] Furthermore, two pressing rollers are arranged front and back on the bridge beam at the paper discharge end, and the positions of the two pressing rollers are adapted to the rack caliper A and the rack caliper B.

[0024] Furthermore, the material conveying mechanism includes a transmission motor, a material conveying driving shaft, a material conveying belt and a material conveying driven shaft;

[0025] The material conveying driving shaft and the material conveying driven shaft are rotatably arranged at the left and right ends of the upper cross beam of the main frame. The material conveying belt cooperates with the material conveying driving shaft and the material conveying driven shaft. The material conveying driving shaft is connected to the transmission motor through a belt transmission mechanism. The transmission motor drives the material conveying driving shaft to rotate through the belt transmission mechanism. The material conveying driving shaft drives the material conveying belt to convey the cardboard for making the container to be bent and formed.

[0026] Furthermore, each forming fixture includes a forming plate and a support seat, the forming plate is tilted on the support seat, all forming plates are tilted toward the paper feed end, and each forming fixture is installed on the bending link of the corresponding multi-link forming structure through the support seat.

[0027] Furthermore, the flexible execution units are arranged in three groups, a total of 6, and the corresponding forming fixtures are also arranged in three groups, namely, forming fixture A and forming fixture D; forming fixture B and forming fixture E; forming fixture C and forming fixture F; the forming fixture A and forming fixture D are symmetrical structures to each other, the forming fixture B and forming fixture E are symmetrical structures to each other, and the forming fixture C and forming fixture F are symmetrical structures to each other.

[0028] Furthermore, the forming fixture A, the forming fixture B and the forming fixture C are placed on the same side, the forming fixture D, the forming fixture E and the forming fixture F7 are placed on the same side, the three groups of forming fixtures are arranged in sequence from the paper feed end to the paper outlet end, and the angles formed by the same groups of forming plates of the three groups of forming fixtures gradually decrease from the paper feed end to the paper outlet end.

[0029] A forming method of a bending forming device for a binding process of multi-size cardboard containers, comprising the following steps:

[0030] (1) An operator inputs the size and specification information of the paperboard of the paperboard container to be made into the electronic control system;

[0031] (2) The electronic control system controls the multi-size caliper mechanism to move according to the received information, so that the rack caliper A and the rack caliper B move to the appropriate position as the reference for the cardboard bending and forming operation;

[0032] (3) The electronic control system will control the multi-link forming structure used in conjunction with forming fixture A, forming fixture B, forming fixture C, forming fixture D, forming fixture E, and forming fixture F to move in sequence according to the received information, so that the above six forming fixtures have appropriate postures to prepare for the cardboard bending and forming operation;

[0033] (4) The material conveying mechanism operates, and the material conveyor belt transports the cardboard from the paper feeding end to the paper discharging end. After passing through the bending and forming operations of the three sets of forming fixtures one by one, the cardboard is finally output as a finished product.

[0034] Compared with the prior art, the bending and forming device for the binding process of multi-size cardboard containers described in the present invention has the following advantages: the multi-size caliper mechanism and the multi-link forming mechanism in its internal components have an automatic deformation function, and can select the most suitable shape and bending fixture position for box-making cardboard with a comprehensive size in the range of 700-2000mm, thereby realizing precise and meticulous bending and forming operations, and can effectively ensure the size and shape accuracy of the produced cardboard containers. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 It is a schematic diagram of the overall layout of the bending and forming device for the binding process of multi-size paperboard containers according to an embodiment of the present invention;

[0037] Figure 2 It is a front structural schematic diagram of the flexible execution unit in the present invention;

[0038] Figure 3 It is a schematic diagram of the reverse structure of the flexible execution unit in the present invention;

[0039] Figure 4 It is a structural schematic diagram of a multi-size caliper mechanism;

[0040] Figure 5 It is a structural schematic diagram of the material conveying mechanism;

[0041] Figure 6 It is a structural schematic diagram of the forming fixture;

[0042] Figure 7 The present invention is a schematic diagram of the working process of the bending and forming device for the binding process of multi-size cardboard containers according to an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 1- Main frame;

[0045] 2-Flexible actuator; 2.1-Driving gear; 2.2-Servo reduction motor; 2.3-Driven gear fan; 2.4-Fastening pin; 2.5-Left long connecting rod; 2.6-Left connecting shaft A; 2.7-Left base; 2.8-Central connecting shaft A; 2.9-Central connecting rod; 2.10-Left transition connecting rod; 2.11-Central connecting shaft B; 2.12-Left short connecting rod; 2.13-Central connecting shaft C; 2.14-Bent connecting rod; 2.15-Right short connecting rod; 2.16-Right transition connecting rod; 2.17-Central connecting shaft D; 2.18-Right long connecting rod; 2.19-Right connecting shaft A; 2.20-Right base; 2.21-Right connecting shaft B; 2.22-Left connecting shaft B;

[0046] 3-Multi-size caliper mechanism; 3.1-bridge beam; 3.2-pressing roller; 3.3-rack caliper A; 3.4-rack caliper B; 3.5-frame longitudinal beam; 3.6-servo motor; 3.7-servo gear;

[0047] 4-forming fixture A;

[0048] 5-Material conveying mechanism; 5.1-Transmission driven wheel; 5.2-Transmission belt; 5.3-Material conveying driving shaft; 5.4-Transmission driving wheel; 5.5-Transmission motor; 5.6-Material conveying belt; 5.7-Material conveying driven shaft;

[0049] 6-forming fixture C; 7-forming fixture F; 8-forming fixture B; 9-forming fixture E; 10-forming fixture D;

[0050] 11-Electronic control system;

[0051] 12-cardboard E; 13-cardboard D; 14-cardboard C; 15-cardboard B; 16-cardboard A. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0053] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0054] like Figure 1-Figure 6As shown, a bending and forming device for a binding process of multi-size cardboard containers includes a main frame 1 including an upper beam, a middle beam and a lower beam, a multi-size caliper mechanism 3, a material conveying mechanism 5 and a plurality of flexible execution units 2, and an electric control system 11 for controlling the actions of the multi-size caliper mechanism 3, the material conveying mechanism 5 and the plurality of flexible execution units 2, wherein the electric control system 11 is fixed on the lower beam of the main frame 1; the electric control system involved in the present invention mainly receives signals to control the actions of various execution elements, which is common knowledge and will not be repeated here.

[0055] The multi-size caliper mechanism 3 is installed on the upper crossbeam of the main frame 1 and is used to adjust the forming basis of the paperboard used to make the container; the material conveying mechanism 5 is installed on the upper crossbeam of the main frame 1, and the multi-size caliper mechanism 3 is arranged directly above the material conveying mechanism 5. Multiple flexible execution units 2 are arranged in pairs on the middle crossbeam of the main frame 1 and are located at the bottom of the paperboard used to make the container. The same group of flexible execution units 2 corresponds to a group of forming fixtures; the two flexible execution units 2 of the same group of flexible execution units are respectively arranged on the front and rear sides of the paperboard used to make the container;

[0056] The material conveying mechanism 5 receives and conveys the cardboard for making the container from the multi-size caliper mechanism 3 through multiple groups of flexible execution units 2 in sequence. The forming fixtures on the flexible execution units 2 cooperate with the multi-size caliper mechanism 3 to bend and shape the cardboard for making the container.

[0057] The flexible execution unit 2 is a multi-link forming structure, including a bending link 2.14, a central connecting shaft C2.13, a central connecting shaft B2.11, a left short connecting rod 2.12, a right short connecting rod 2.15, a left long connecting rod 2.5, a right long connecting rod 2.18, a central connecting shaft A2.8, a central connecting rod 2.9, a central connecting shaft D2.17, a left transition connecting rod 2.10, a right transition connecting rod 2.16, a left connecting shaft B2.22, a right connecting shaft B2.21, a left base 2.7, a right base 2.20, a left connecting shaft A2.6, a right connecting shaft A2.19, a fastening pin shaft 2.4, a driven gear fan 2.3, a driving gear 2.1 and a servo reduction motor 2.2;

[0058] The servo reduction motor 2.2 is located at the bottom of the multi-link forming structure and is the power element of the entire mechanism. The output shaft of the servo reduction motor 2.2 is connected to the driving gear 2.1. It can be placed to the left or right according to the specific installation position of the multi-link forming structure on the main frame 1. The servo reduction motor 2.2 is fixed to the lower crossbeam of the main frame 1 through its own flange;

[0059] The center planes of the driving gear 2.1, the driven gear sector 2.3, the central connecting rod 2.9 and the bent connecting rod 2.14 are located in the same vertical plane, and this vertical plane is the symmetric center plane of the multi-connecting rod forming structure;

[0060] The left base 2.7 and the right base 2.20 are placed symmetrically with respect to the symmetric center plane of the multi-link forming structure, and are fixed to the middle crossbeam of the main frame 1 by threaded connection;

[0061] The left long connecting rod 2.5 and the right long connecting rod 2.18 are fixedly connected to the left connecting shaft A2.6 and the right connecting shaft A2.19 through the holes in the middle and lower parts of each, and are connected to the shaft holes at the lower parts of the left base 2.7 and the right base 2.20 through the bearings through the left connecting shaft A2.6 and the right connecting shaft A2.19;

[0062] The driven gear fan 2.3 is located between the left long connecting rod 2.5 and the right long connecting rod 2.18. The driven gear fan 2.3 is fixedly installed with the holes at the bottom of the left long connecting rod 2.5 and the right long connecting rod 2.18 through its own holes through the fastening pin 2.4, and drives the left long connecting rod 2.5 to rotate around the left connecting axis A2.6 in the shaft hole at the bottom of the left base 2.7 through the meshing action with the driving gear 2.1, and drives the right long connecting rod 2.18 to rotate around the right connecting axis A2.19 in the shaft hole at the bottom of the right base 2.20;

[0063] The left long connecting rod 2.5 and the right long connecting rod 2.18 are fixedly connected to the two ends of the central connecting shaft A2.8 through the holes in their upper and middle parts, and the middle part of the central connecting shaft A2.8 is connected to the tail end shaft hole of the central connecting rod 2.9 through a bearing;

[0064] The left long connecting rod 2.5 and the right long connecting rod 2.18 are fixedly connected to the two ends of the central connecting shaft B2.11 through the holes on their tops, and the middle of the central connecting shaft B2.11 is connected to the tail end shaft hole of the bent connecting rod 2.14 through a bearing;

[0065] The first end axial hole of the bent connecting rod 2.14 is connected to the middle of the central connecting shaft C2.13 through a bearing, and the two ends of the central connecting shaft C2.13 are fixedly installed with the first end holes of the left short connecting rod 2.12 and the right short connecting rod 2.15 respectively;

[0066] The left short connecting rod 2.12 and the right short connecting rod 2.15 are fixedly connected to the central connecting shaft D2.17 through their respective tail end holes. The middle of the central connecting shaft D2.17 is connected to the head end shaft hole of the central connecting rod 2.9 through a bearing. The two ends of the central connecting shaft D2.17 are respectively connected to the head end shaft holes of the left transition connecting rod 2.10 and the right transition connecting rod 2.16; the left short connecting rod 2.12 and the right short connecting rod 2.15 are symmetrically arranged on both sides of the head end shaft hole of the central connecting rod 2.9;

[0067] The left transition connecting rod 2.10 and the right transition connecting rod 2.16 are fixedly connected to the left connecting shaft B2.22 and the right connecting shaft B2.21 through their respective tail end holes and are connected to the shaft holes on the upper parts of the left base 2.7 and the right base 2.20 through bearings through the left connecting shaft B2.22 and the right connecting shaft B2.21.

[0068] The multi-size caliper mechanism 3 includes two parallel bridge beams 3.1, a frame longitudinal beam 3.5, a rack caliper A3.3 and a rack caliper B3.4, and the bridge beam 3.1 is a supporting structure of the multi-size caliper mechanism 3;

[0069] The frame-type longitudinal beam comprises a longitudinal beam and a plurality of vertical frames fixedly arranged at the lower part of the longitudinal beam, two parallel bridge-type cross beams 3.1 are respectively fixedly arranged at the left and right ends of the longitudinal beam, and the two bridge-type cross beams 3.1 are both fixedly installed on the upper cross beam of the main frame 1, and two rack calipers are arranged in parallel at the front and rear sides of the longitudinal beam;

[0070] The rack caliper A3.3 and the rack caliper B3.4 have the same structure, and both include a caliper structure, a rack structure and a slide rail structure. The caliper structure is the basis for cardboard bending and forming operations. The slide rail structure and the rack structure of each rack caliper form a sliding pair with the corresponding vertical frame of the frame longitudinal beam 3.5, and each of the rack structures is meshed with the corresponding servo gear 3.7. Driven by the corresponding servo motors 3.6, the rack caliper A3.3 and the rack caliper B3.4 are driven to move as a whole along the sliding pair to adjust the lateral spacing between the two caliper structures.

[0071] The rack structure and the slide rail structure are arranged along the length direction of their respective caliper structures, and the rack structure and the slide rail structure are arranged in parallel. The plurality of vertical frames include four narrow frames and two wide frames, and the four narrow frames are arranged in groups of two. The two groups of narrow frames are arranged crosswise with the two wide frames. The slide rail structures of the two rack calipers are slidably arranged in one group of narrow frames, and the rack structures of the two rack calipers are slidably arranged in the other group of narrow frames. The two servo motors 3.6 are respectively installed in the two wide frames through their own flanges.

[0072] Two pressing rollers 3.2 are arranged front and back on the bridge beam at the paper discharge end. Specifically, the two pressing rollers 3.2 are installed through holes on the horizontal plane of the bridge beam 3.1 at the paper discharge end. The two pressing rollers 3.2 are adapted to the positions of the rack caliper A3.3 and the rack caliper B3.4. The two pressing rollers 3.2 are arranged to roll and compact the bent paperboard container, deepen the creases, and increase the flatness and reliability of the bent paperboard.

[0073] The material conveying mechanism 5 comprises a transmission motor 5.5, a material conveying driving shaft 5.3, a material conveying belt 5.6 and a material conveying driven shaft 5.7;

[0074] The material conveying driving shaft 5.3 and the material conveying driven shaft 5.7 are rotatably arranged at the left and right ends of the upper crossbeam of the main frame 1, and the material conveying belt 5.6 cooperates with the material conveying driving shaft 5.3 and the material conveying driven shaft 5.7. The material conveying driving shaft 5.3 is connected with the transmission motor 5.5 through a belt transmission mechanism, and the transmission motor 5.5 drives the material conveying driving shaft 5.3 to rotate through the belt transmission mechanism, and the material conveying driving shaft 5.3 drives the material conveying belt 5.6 to convey the cardboard for making the container to be bent and formed; the belt transmission mechanism includes a transmission driving wheel 5.4, a transmission driven wheel 5.1 and a transmission belt 5.2, and the conveyor belt 5.2 is sleeved on the transmission driving wheel 5.4 and the transmission driven wheel 5.1, the transmission driving wheel 5.4 is fixed on the output shaft of the transmission motor 5.5, and the transmission driven wheel 5.1 is fixed on the material conveying driving shaft 5.3.

[0075] Each forming fixture includes a forming plate and a support seat, the forming plate is tilted on the support seat, all forming plates are tilted toward the paper feed end, and each forming fixture is installed on the bending link of the corresponding multi-link forming structure through the support seat.

[0076] The flexible execution units 2 are arranged in three groups, with a total of 6, and the corresponding forming fixtures are also arranged in three groups, with a total of 6, namely forming fixture A4 and forming fixture D10; forming fixture B8 and forming fixture E9; forming fixture C6 and forming fixture F7; the forming fixture A4 and forming fixture D10 are symmetrical structures to each other, the forming fixture B8 and forming fixture E9 are symmetrical structures to each other, and the forming fixture C6 and forming fixture F7 are symmetrical structures to each other.

[0077] The forming fixture A4, forming fixture B8 and forming fixture C6 are placed on the same side, that is, placed on the front side of the forming device, and the forming fixture D10, forming fixture E9 and forming fixture F7 are placed on the same side, that is, placed on the back side of the forming device. The three groups of forming fixtures are arranged in sequence from the paper feed end to the paper discharge end, and the angle formed by the same group of forming plates of the three groups of forming fixtures gradually decreases from the paper feed end to the paper discharge end, which is beneficial to the bending forming of the paperboard container.

[0078] The main frame 1 is the main structure of the entire bending and forming device, and is responsible for installing and fixing all other parts; the multi-size caliper mechanism 3 is the basis for the device to carry out the bending and forming operation of the cardboard container. It is installed on the upper crossbeam of the main frame 1 through a threaded connection, and can adjust its own structural shape according to the cardboard size and specifications of the container to be made to meet the production needs of multi-size cardboard containers; the material conveying mechanism 5 is responsible for receiving, conveying and outputting the cardboard used to make the container. The material conveying shaft in its internal component is installed on the upper crossbeam of the main frame 1 through a bearing, and the transmission motor in its internal component is installed on the middle crossbeam of the main frame 1 through a threaded connection; the multi-link forming structure is the flexible execution unit of the entire device 2, the base in its internal components is installed on the middle beam of the main frame 1 through threaded connection, and the servo reduction motor in its internal components is installed on the lower beam of the main frame 1 through a flange. The multi-link forming structure can be connected with the corresponding forming fixtures A4, B8, C6, D10, E9, and F7 through threaded connection according to the characteristics of its actual installation position, and cooperate with the multi-size caliper mechanism 3 to complete the bending and forming operation of the cardboard container; the electronic control system 11 is the control core of the entire device, which is installed on the lower beam of the main frame 1 through threaded connection, and is responsible for receiving the work instructions of the operator and controlling each component to move as required to achieve the corresponding bending and forming operation.

[0079] This device is mainly aimed at small and medium-sized enterprise customers. It has the characteristics of low cost and high precision. It is suitable for the bending and forming operations of corrugated cardboard required for the production of large quantities and multi-size cardboard containers. It can solve the practical problems currently existing in this field, such as the single model and specification of packaging boxes, long intervals between order changes, large deviations in binding seam dimensions, and high defective product rates.

[0080] like Figure 7 As shown, a forming method of a bending forming device for a binding process of multi-size cardboard containers comprises the following steps:

[0081] (1) The operator inputs the size and specification information of the paperboard A16 to be made into the electronic control system 11;

[0082] (2) The electronic control system 11 controls the multi-size caliper mechanism 3 to operate according to the received information, so that the rack caliper A3.3 and the rack caliper B3.4 move to a suitable position as a reference for the cardboard bending and forming operation;

[0083] (3) The electronic control system 11 controls the multi-link forming structure used in conjunction with the forming fixture A4, the forming fixture B8, the forming fixture C6, the forming fixture D10, the forming fixture E9, and the forming fixture F7 to move in sequence according to the received information, so that the above six forming fixtures have appropriate postures to prepare for the cardboard bending and forming operation;

[0084] (4) The electronic control system 11 controls the material conveying mechanism 5 to operate, so that the material conveying belt 5.6 follows Figure 7 The cardboard A16 is transported in the paper feeding direction shown, and after being bent and formed by three sets of forming fixtures in sequence, it is formed into cardboard B15, cardboard C14 and cardboard D13, and finally the finished product, i.e., cardboard E12, is output to the next production process.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bending and forming device for the binding process of multi-size cardboard containers, characterized in that: It comprises a main frame (1) including an upper crossbeam, a middle crossbeam and a lower crossbeam, a multi-size caliper mechanism (3), a material conveying mechanism (5) and a plurality of flexible execution units (2); The multi-size caliper mechanism (3) is mounted on the upper crossbeam of the main frame (1) and is used to adjust the molding datum of the paperboard used to make the container; the material conveying mechanism (5) is mounted on the upper crossbeam of the main frame (1), and the multi-size caliper mechanism (3) is arranged directly above the material conveying mechanism (5); a plurality of flexible execution units (2) are arranged in pairs on the middle crossbeam of the main frame (1) and are located at the bottom of the paperboard used to make the container; the same group of flexible execution units (2) corresponds to a group of molding fixtures; the two flexible execution units (2) of the same group of flexible execution units are respectively arranged on the front and rear sides of the paperboard used to make the container; The material conveying mechanism (5) receives and conveys the paperboard for making the container from the multi-size caliper mechanism (3) to pass through the multiple groups of flexible execution units (2) in sequence, and the forming fixtures on the flexible execution units (2) cooperate with the multi-size caliper mechanism (3) to bend and shape the paperboard for making the container; The flexible execution unit (2) is a multi-link forming structure, comprising a bent link (2.14), a central connecting axis C (2.13), a central connecting axis B (2.11), a left short link (2.12), a right short link (2.15), a left long link (2.5), a right long link (2.18), a central connecting axis A (2.8), a central connecting axis (2.9), a central connecting axis D (2.17), a left transition link (2.10), a right transition link (2.16), a left connecting axis B (2.22), a right connecting axis B (2.21), a left base (2.7), a right base (2.20), a left connecting axis A (2.6), a right connecting axis A (2.19), a driven gear fan (2.3), a driving gear (2.1) and a servo reduction motor (2.2); The servo reduction motor (2.2) is fixed on the lower crossbeam of the main frame (1), and the output shaft of the servo reduction motor (2.2) is connected to the driving gear (2.1); The central planes of the driving gear (2.1), the driven gear fan (2.3), the central connecting rod (2.9) and the bent connecting rod (2.14) are located in the same vertical plane, and the vertical plane is the symmetric central plane of the multi-connecting rod forming structure; The left base (2.7) and the right base (2.20) are placed symmetrically with respect to the symmetric center plane of the multi-link forming structure, and are fixed on the middle crossbeam of the main frame (1); The left long connecting rod (2.5) and the right long connecting rod (2.18) are respectively fixedly connected to the left connecting shaft A (2.6) and the right connecting shaft A (2.19) through the holes in their middle and lower parts, and are respectively connected to the shaft holes in the lower parts of the left base (2.7) and the right base (2.20) through the left connecting shaft A (2.6) and the right connecting shaft A (2.19); The driven gear fan (2.3) is located between the left long connecting rod (2.5) and the right long connecting rod (2.18). The driven gear fan (2.3) is fixedly installed with the holes at the bottom of the left long connecting rod (2.5) and the right long connecting rod (2.18) through its own holes, and drives the left long connecting rod (2.5) to rotate around the left connecting axis A (2.6) in the shaft hole at the bottom of the left base (2.7) through meshing with the driving gear (2.1), and drives the right long connecting rod (2.18) to rotate around the right connecting axis A (2.19) in the shaft hole at the bottom of the right base (2.20); The left long connecting rod (2.5) and the right long connecting rod (2.18) are fixedly connected to the two ends of the central connecting shaft A (2.8) through the holes in their upper and middle parts, and the middle part of the central connecting shaft A (2.8) is connected to the rear end shaft hole of the central connecting rod (2.9); The left long connecting rod (2.5) and the right long connecting rod (2.18) are fixedly connected to the two ends of the central connecting shaft B (2.11) through the holes at their tops, and the middle of the central connecting shaft B (2.11) is connected to the tail end shaft hole of the bent connecting rod (2.14); The first end axial hole of the bent connecting rod (2.14) is connected to the middle of the central connecting axis C (2.13), and the two ends of the central connecting axis C (2.13) are respectively fixedly installed with the first end holes of the left short connecting rod (2.12) and the right short connecting rod (2.15); The left short connecting rod (2.12) and the right short connecting rod (2.15) are fixedly connected to the central connecting shaft D (2.17) through their respective tail end holes; the middle of the central connecting shaft D (2.17) is connected to the head end shaft hole of the central connecting rod (2.9); the two ends of the central connecting shaft D (2.17) are respectively connected to the head end shaft holes of the left transition connecting rod (2.10) and the right transition connecting rod (2.16); the left short connecting rod (2.12) and the right short connecting rod (2.15) are symmetrically arranged on both sides of the head end shaft hole of the central connecting rod (2.9); The left transition connecting rod (2.10) and the right transition connecting rod (2.16) are fixedly connected to the left connecting shaft B (2.22) and the right connecting shaft B (2.21) through their respective tail end holes, and are connected to the shaft holes on the upper parts of the left base (2.7) and the right base (2.20) through the left connecting shaft B (2.22) and the right connecting shaft B (2.21). The multi-size caliper mechanism (3) comprises two parallel bridge beams (3.1), a frame longitudinal beam (3.5), a rack caliper A (3.3) and a rack caliper B (3.4), wherein the frame longitudinal beam comprises a longitudinal beam and a plurality of vertical frames fixedly arranged at the lower part of the longitudinal beam, the two parallel bridge beams (3.1) are respectively fixedly arranged at the left and right ends of the longitudinal beam, the two bridge beams (3.1) are both fixedly mounted on the upper cross beam of the main frame (1), and the two rack calipers are arranged in parallel at the front and rear sides of the longitudinal beam; The rack caliper A (3.3) and the rack caliper B (3.4) have the same structure and both include a caliper structure, a rack structure and a slide rail structure. The slide rail structure and the rack structure of each rack caliper form a sliding pair with the corresponding vertical frame of the frame-type longitudinal beam (3.5), and each rack structure is meshed with a corresponding servo gear (3.7). Under the drive of the corresponding servo motor (3.6), the rack caliper A (3.3) and the rack caliper B (3.4) are driven to move as a whole along the sliding pair to adjust the lateral spacing between the two caliper structures. The electric control system (11) is installed on the lower crossbeam of the main frame (1) through threaded connection.

2. The bending and forming device for binding of multi-size cardboard containers according to claim 1, characterized in that: The rack structure and the slide rail structure are arranged along the length direction of the respective caliper structures, and the rack structure and the slide rail structure are arranged in parallel. The plurality of vertical frames include four narrow frames and two wide frames, and the four narrow frames are arranged in groups of two, and the two groups of narrow frames are arranged crosswise with the two wide frames. The slide rail structures of the two rack calipers are slidably arranged in one group of narrow frames, and the rack structures of the two rack calipers are slidably arranged in another group of narrow frames. The two servo motors (3.6) are respectively installed in the two wide frames.

3. The bending and forming device for binding of multi-size paperboard containers according to claim 2 is characterized in that: Two pressing rollers (3.2) are arranged front and back on the bridge-type crossbeam at the paper discharge end, and the positions of the two pressing rollers (3.2) are adapted to the positions of the rack caliper A (3.3) and the rack caliper B (3.4).

4. The bending and forming device for binding of multi-size cardboard containers according to claim 1, characterized in that: The material conveying mechanism (5) comprises a transmission motor (5.5), a material conveying driving shaft (5.3), a material conveying belt (5.6) and a material conveying driven shaft (5.7); The material conveying driving shaft (5.3) and the material conveying driven shaft (5.7) are rotatably arranged at the left and right ends of the upper crossbeam of the main frame (1); the material conveying belt (5.6) cooperates with the material conveying driving shaft (5.3) and the material conveying driven shaft (5.7); the material conveying driving shaft (5.3) is connected to the transmission motor (5.5) through a belt transmission mechanism; the transmission motor (5.5) drives the material conveying driving shaft (5.3) to rotate through the belt transmission mechanism; the material conveying driving shaft (5.3) drives the material conveying belt (5.6) to convey the cardboard for making the container to be bent and formed.

5. The bending and forming device for binding of multi-size cardboard containers according to claim 1, characterized in that: Each forming fixture includes a forming plate and a support seat, the forming plate is tilted on the support seat, all forming plates are tilted toward the paper feed end, and each forming fixture is installed on the bending link of the corresponding multi-link forming structure through the support seat.

6. The bending and forming device for binding of multi-size paperboard containers according to claim 5, characterized in that: The flexible execution units (2) are arranged in three groups, a total of 6, and the corresponding forming fixtures are also arranged in three groups, namely, forming fixture A (4) and forming fixture D (10); forming fixture B (8) and forming fixture E (9); forming fixture C (6) and forming fixture F (7); the forming fixture A (4) and forming fixture D (10) are symmetrical structures to each other, the forming fixture B (8) and forming fixture E (9) are symmetrical structures to each other, and the forming fixture C (6) and forming fixture F (7) are symmetrical structures to each other.

7. The bending and forming device for binding of multi-size paperboard containers according to claim 6, characterized in that: The forming jig A (4), the forming jig B (8) and the forming jig C (6) are placed on the same side, and the forming jig D (10), the forming jig E (9) and the forming jig F (7) are placed on the same side. The three groups of forming jigs are arranged in sequence from the paper feed end to the paper discharge end, and the angle formed by the same group of forming plates of the three groups of forming jigs gradually decreases from the paper feed end to the paper discharge end.

8. A forming method of a bending forming device for a binding process of multi-size paperboard containers according to any one of claims 1 to 7, comprising the following steps: Step 1: An operator inputs the size and specification information of the paperboard of the paperboard container to be made into the electronic control system (11); Step 2: The electronic control system (11) controls the multi-size caliper mechanism (3) to move according to the received information, so that the rack caliper A (3.3) and the rack caliper B (3.4) move to appropriate positions as a reference for the cardboard bending and forming operation; Step 3: The electric control system (11) controls the multi-link forming structure used in conjunction with the forming fixture A (4), the forming fixture B (8), the forming fixture C (6), the forming fixture D (10), the forming fixture E (9), and the forming fixture F (7) to move in sequence according to the received information, so that the above six forming fixtures have appropriate postures to prepare for the cardboard bending and forming operation; Step 4: The material conveying mechanism (5) is in operation, and the material conveyor belt (5.6) transports the cardboard from the paper feeding end to the paper discharging end. After being bent and formed by the three sets of forming fixtures one by one, the cardboard is finally output as a finished product.

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