An automatic wet wipe conveying and folding system

Abstract

The present application relates to the technical field of automatic production of wet wipes, and in particular to an automatic wet wipe conveying and folding system, comprising an upstream conveying line assembly, a downstream conveying line assembly and an automatic wet wipe folding and pressing device, wherein the automatic wet wipe folding and pressing device is installed between the discharging end of the upstream conveying line assembly and the feeding end of the downstream conveying line assembly, and the folded wet wipes are pressed to be neat and then conveyed to the downstream conveying line assembly. The system adopts a horizontal conveying state to fold the wet wipes on both sides in sequence to form three-folded wet wipes. The folding process is relatively fast and flexible, and the traditional roller type clamping folding mode is changed. The system adopts a mode of first lifting the corresponding folding edge of the wet wipe, then pushing horizontally, and then pressing downward to realize fast folding, fast pressing of the folding part and fast return, thereby improving the folding efficiency. The entire action is completed by a flat pushing plate, which can better ensure the flatness of the wet wipe after being pressed downward.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic production of wet wipes, in particular to a new production line system capable of achieving rapid three-fold folding and conveying of wet wipes, and more particularly to an automatic folding and conveying system for wet wipes. BACKGROUND

[0002] Wet wipes are generally moist paper towels used for wiping the skin. Currently, wet wipes on the market can be roughly divided into two categories: one is already sterilized, but cannot sterilize other objects, and contains skin care ingredients, and can only be used for skin moisturizing and maintenance; the other is not only sterilized, but also can sterilize other objects, and can be used for skin disinfection or sterilization of cuts and scratches.

[0003] The production processes of the above two types of wet wipes are roughly the same but also have certain differences, but generally include processes such as feeding, liquid adding, folding, stacking, packaging, and output of finished products. Among them, the folding process plays an important role in the rapid formation of products in the wet wipe production process.

[0004] In the prior art, there are many wet wipe folding devices and structures in the production line of wet wipes. However, most folding devices generally adopt, for example, the wet wipe folding device disclosed in the patent application No. CN202120493828.0, which mainly includes a rack, a lower knife roller, a first folding roller, and a second folding roller rotatably connected to the rack, a gear set connected to the lower knife roller, the first folding roller, and the second folding roller, two lower knife rollers, first folding rollers, and second folding rollers symmetrically arranged, and two second folding rollers cooperating with each other, the first folding roller cooperating with the second folding roller, the lower knife roller cooperating with the first folding roller, a first cloth inserting knife provided on the outer periphery of the lower knife roller, a plurality of cloth clamping blocks provided on the first folding roller and cooperating with the first cloth inserting knife, the cloth clamping blocks being connected to a driving assembly for driving the cloth clamping blocks to move, a main air hole provided on the second folding roller for transferring wet cloth from the first folding roller, a second cloth inserting knife and a cloth clamping block provided on the second folding roller, and the cloth clamping block on one folding roller cooperating with the second cloth inserting knife on the other folding roller.

[0005] As can be seen from the aforementioned existing technology patents, its operation mainly involves placing the wet wipe fabric into the clamping block of the first folding roller through the first cloth-feeding knife. Then, the clamping block pulls the wet wipe fabric off the lower blade roller along with the first folding roller, completing one fold. Then, it is adsorbed through the main air hole opened on the second folding roller to complete a second fold. When using a multi-roller structure, wet wipes generally need to go around multiple rollers during folding, and the gaps between the rollers are small. All of these multi-roller structures are working parts that directly contact the wet wipes, which can easily accumulate stains during long-term operation and make cleaning difficult. In addition, the entire folding structure is relatively cumbersome and complex, with multiple motor drive components and numerous folding action components that directly contact the wet wipes. After a malfunction occurs during operation, it is difficult to perform targeted inspection and maintenance.

[0006] Therefore, this invention specifically researches and designs new machinery for the processes of conveying and folding wet wipes in existing production processes. Here, a new mechanical system is proposed that uses plate-type periodic pushing to achieve rapid batch folding of wet wipes, in order to better solve the problems existing in the prior art. Summary of the Invention

[0007] To solve one of the aforementioned technical problems, the present invention provides an automatic wet wipe conveying and folding system, comprising an upstream conveyor assembly, a downstream conveyor assembly, and an automatic wet wipe folding and pressing device. The automatic wet wipe folding and pressing device is installed between the unloading end of the upstream conveyor assembly and the loading end of the downstream conveyor assembly. The automatic wet wipe folding and pressing device is used to quickly fold each wet wipe conveyed from the upstream conveyor assembly in sequence, press it neatly after folding, and continue to convey it to the downstream conveyor assembly. The downstream of the downstream conveyor assembly is connected to an external automatic wet wipe palletizer and wet wipe packaging equipment.

[0008] In any of the above embodiments, it is preferred that the feeding end of the upstream conveyor assembly is equipped with a wet wipe feeding device connected to the upper upstream part, wherein the wet wipe feeding device places the wet wipes to be processed in a flat and orderly manner on the upstream conveyor assembly.

[0009] In any of the above solutions, it is preferred that the automatic wet wipe folding and pressing device folds the wet wipes using a plate-type pushing and three-folding method during operation, so that the folded wet wipes are in a three-fold state and the creases are pressed neatly.

[0010] In any of the above embodiments, it is preferred that the upstream conveyor assembly includes a horizontally arranged upstream main board chain conveyor, and an upstream secondary board chain conveyor is symmetrically arranged on both sides of the upstream main board chain conveyor. The two upstream secondary board chain conveyors move synchronously and in the same direction as the upstream main board chain conveyor, and the end of the upstream main board chain conveyor is longer than the end of the two upstream secondary board chain conveyors.

[0011] The middle part of the transported wet wipes is placed on the upper surface of the upstream auxiliary plate chain conveyor, and the two ends of the transported wet wipes are symmetrically laid on the upper surface of the upstream auxiliary plate chain conveyor at the corresponding positions;

[0012] The upstream main plate chain conveyor and the two upstream auxiliary plate chain conveyors jointly drive the wet wipes arranged thereon to be transported downstream.

[0013] In any of the above solutions, preferably, the upper surface of the upstream main plate chain conveyor is lower than the upper surfaces of the two upstream auxiliary plate chain conveyors.

[0014] In any of the above solutions, preferably, the wet wipe automatic folding and pressing device comprises two folding and pressing mechanisms respectively arranged at the ends of the upstream auxiliary plate chain conveyors and the left and right sides of the upstream main plate chain conveyor at the corresponding positions, the two folding and pressing mechanisms work alternately and intermittently in sequence and complete left-side folding, outer-end-side folding of the wet wipes, and there is no motion interference in the working process, and the upper surfaces of the two folding and pressing mechanisms are flush with the upper surface of the upstream auxiliary plate chain conveyor.

[0015] The folding and pressing mechanism adopts a periodic operation mode of first jacking, inside flat pushing, then pressing down, and outside moving back to position to realize folding and flattening of the wet wipes.

[0016] The inner ends of the two folding and pressing mechanisms are connected with a folding power driving mechanism, and the folding power driving mechanism is used to control the two folding and pressing mechanisms to realize alternate motion.

[0017] In any of the above solutions, preferably, the folding power driving mechanism comprises two servo control motors arranged opposite to each other, and the inner ends of the horizontal driving rotating shafts of the folding and pressing mechanisms at the corresponding positions are connected with the two servo control motors through couplings; the left-side servo control motor and the outer-end-side servo control motor are controlled by a program to realize alternate intermittent operation.

[0018] In any of the above solutions, preferably, in the folding working state, the outer-end-side folding and pressing mechanism and the left-side folding and pressing mechanism are in interval motion when moving, after the left-side folding and pressing mechanism completes a complete wet wipe folding action and returns to the original position, the outer-end-side folding and pressing mechanism starts to complete a complete wet wipe folding action after an interval of 0.5-1 seconds, and the left-side folding and pressing mechanism again completes a complete wet wipe folding action and returns to the original position after an interval of 0.5-1 seconds, and the cycle is repeated.

[0019] In any of the above solutions, preferably, the folding and pushing mechanism on the left side and the folding and pushing mechanism on the outer end side each, after completing the folding of the left and right sides of the same wet tissue, feed the in-position sensor at the corresponding position to the system and control the upstream main chain conveyor to continue to convey the next wet tissue to be folded, while sending the three-folded wet tissue to the downstream conveying line assembly.

[0020] In any of the above solutions, preferably, the folding and pushing mechanism comprises a horizontal driving rotating shaft, both ends of the horizontal driving rotating shaft are movably sleeved with fixedly arranged limiting shaft sleeves, the horizontal driving rotating shaft is rotationally fixed in the two limiting shaft sleeves, a self-rotating pushing device is fixedly installed on the outer end outer side wall of the horizontal driving rotating shaft, a lifting cam for lifting is fixedly installed on the middle outer side wall of the horizontal driving rotating shaft, the shaft center of the lifting cam is coaxially arranged with the horizontal driving rotating shaft, a pushing and returning mechanism is arranged above the lifting cam, and the pushing and returning mechanism is used to realize inward folding and pressing of the corresponding side wet tissue.

[0021] The self-rotating pushing device is used to control the horizontal movement of the pushing and returning mechanism, and the lifting cam is used to control the vertical lifting of the pushing and returning mechanism.

[0022] In any of the above solutions, preferably, the self-rotating pushing device comprises a vertical turntable, the center of the vertical turntable is fixed on the outer side wall of the horizontal driving rotating shaft and coaxially arranged with the horizontal driving rotating shaft, a horizontal rotating pushing cylinder is fixedly installed on the inner side of the vertical turntable, the inner end face of the horizontal rotating pushing cylinder is divided into an outer side vertical face section and an inner side vertical face section, the outer side vertical face section and the inner side vertical face section are vertically arranged, an upper flat surface is arranged on the outer side upper part of the inner side vertical face section, and the end portions at the corresponding positions of the outer side vertical face section and the inner side vertical face section are respectively connected through transition inclined curved surfaces, and the two transition inclined curved surfaces are symmetrically arranged.

[0023] The interval distance between the outer side vertical face section and the inner side vertical face section is equal to the translation distance of the pushing and returning mechanism.

[0024] Preferably in any of the above solutions, the pushing return mechanism comprises a pushing plate horizontally arranged at the end of the upstream secondary plate chain conveyor at the corresponding position, a vertically arranged guide column is fixedly installed at the bottom of the outer end of the pushing plate, the lower end of the guide column is fixedly connected with a horizontal lifting tray, the bottom of the horizontal lifting tray is always abutted against the top of the lifting cam below the corresponding position, a vertical guide limiting sleeve is sleeved on the outer side wall of the middle part of the guide column, coaxial and horizontally arranged outer end linkage shafts and inner end linkage shafts are fixedly arranged on the left and right sides of the vertical guide limiting sleeve, the outer end linkage shafts and the inner end linkage shafts are coaxially arranged, axis limiting sleeves are movably sleeved on the end outer side walls of the outer end linkage shafts and the inner end linkage shafts, a universal rolling guide is installed at the outer end of the outer end linkage shaft and abutted against the outer side vertical surface section, the inner side vertical surface section and the two transition inclined curved surfaces on the outer end surface of the self-rotating pushing device, a spring baffle is fixedly arranged on the outer side wall of the inner end linkage shaft at the outer end side of the vertical guide limiting sleeve, a return spring is sleeved on the outer side wall of the inner end linkage shaft between the return spring baffle and the axis limiting sleeve at the outer end side, and the two ends of the return spring are respectively abutted and fixedly connected with the return spring baffle and the axis limiting sleeve at the outer end side.

[0025] Preferably in any of the above solutions, a plurality of punching through openings are sequentially and spacedly arranged on the surfaces of the plate chains of the upstream main plate chain conveyor along the width direction of the upstream main plate chain conveyor, and a wet tissue middle positioner is fixedly arranged in suspension between the upper and lower plate chains of the upstream main plate chain conveyor between the two folding pushing mechanisms. The wet tissue middle positioner improves the middle stability of the wet tissues during left and right folding and prevents passive side movement of the wet tissues by temporarily positioning the middle part of the wet tissues before folding.

[0026] Preferably in any of the above solutions, each plate chain is made of a stainless steel plate chain.

[0027] Preferably in any of the above solutions, the wet tissue middle positioner comprises a negative pressure fan fixedly arranged in suspension between the upper and lower plate chains of the upstream main plate chain conveyor between the two folding pushing mechanisms. The negative pressure suction port of the negative pressure fan is upwardly arranged and close to the punching through openings at the positions of the upper plate chains. In the working state, the negative pressure fan realizes adsorption positioning of the middle part of the wet tissues on each plate chain above the negative pressure fan through negative pressure suction cooperation of the punching through openings, thereby improving the middle stability of the wet tissues during left and right folding and preventing passive side movement of the wet tissues.

[0028] Preferably in any of the above solutions, the horizontal driving rotating shaft drives the rotation of the self-rotating pusher, and the rotation of the self-rotating pusher makes the outer side vertical section, the transition inclined curved surface and the inner side vertical section on the outer end surface of the self-rotating pusher sequentially abut against the universal rolling guide, and the transition inclined curved surface in the two rotating states abuts against the universal rolling guide to push the translation and reset of the whole push reset mechanism.

[0029] Preferably in any of the above solutions, the push plate on the push reset mechanism is in parallel connection with the end of the upstream secondary plate chain conveyor and has a spacing distance of 3-5 mm, and the bottom of the push plate is higher than the upper surface of the corresponding plate chain of the upstream primary plate chain conveyor and has a spacing distance of 1-2 mm.

[0030] Preferably in any of the above solutions, the inner end of the push plate is provided with a polished rounded surface, and the push plate is a stainless steel plate and the surface is polished.

[0031] Preferably in any of the above solutions, a position switch for realizing position control is installed at the corresponding working position of the whole system to better cooperate with the execution of the actions of the mechanical parts of the whole system. The control part belongs to the conventional technology in the prior art and does not belong to the innovative part of the application, so it is not described here.

[0032] Compared with the prior art, the application has the following beneficial effects:

[0033] 1. The system adopts the mode of sequentially folding the wet wipes on the left and right sides under the horizontal conveying state to form three-folded folded wet wipes, and the whole folding process is relatively fast and flexible, changing the traditional roller type clamping folding mode.

[0034] Unique folding action design: the mode of first lifting the corresponding folding edge of the wet wipe, then pushing horizontally, and then pressing down is adopted to realize fast folding and fast pressing and resetting of the folding part creases, and the folding efficiency is improved. At the same time, the whole action is completed by the flat push plate, which can better ensure the flatness of the wet wipe after pressing down.

[0035] The flat push plate as the folding execution component has a flat structure that can be easily cleaned after long-term use, and the maintenance is convenient and fast.

[0036] 2. The whole system is installed on the wet wipe conveying line, can continuously fold the wet wipes in production fast and periodically, and can directly continue to convey downstream after folding is completed, does not affect the normal operation of the downstream stacking and packaging process, has high flexibility and high folding efficiency, and is suitable for use in large batch wet wipe production workshops.

[0037] 3、The system in the folding state, the outer end side of the folding push mechanism and the left side of the folding push mechanism are interval movement when moving, when the left side of the folding push mechanism completes a complete wet tissue folding action and returns to the original position, interval 0.5-1 seconds, the outer end side of the folding push mechanism starts and completes a complete wet tissue folding action, interval 0.5-1 seconds, the left side of the folding push mechanism again completes a complete wet tissue folding action and returns to the original position, so the cycle movement, the interval time can be set to provide the time of the current folded wet tissue and the next wet tissue to be folded to the transfer station, ensure the connection of the whole folding and conveying movement, improve the smoothness of the whole system work.

[0038] 4、The system adopts the plate type push three-fold folding method to fold the wet tissue, and the folded wet tissue is in a three-fold folding state and the creases are pressed in order, effectively ensuring the folding quality.

[0039] 5、In order to ensure the stability of the middle part of the wet tissue during folding, a negative pressure type wet tissue middle positioner is also configured in the system, which can better cooperate with the folding push mechanism on both sides to complete the rapid folding of the wet tissue on both sides.

[0040] 6、Each folding push mechanism is only powered by a servo control motor 501, which is convenient for maintenance and positioning after failure, and has lower maintenance and repair cost; and the whole system transmission does not have precise and easy-to-damage components, has longer service life and lower maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual proportion.

[0042] Figure 1 It is a top layout structure schematic diagram of the present application.

[0043] Figure 2 It is a local structure schematic diagram of the present application in E-E direction (part of the main body of the wet tissue feeding equipment, the upstream auxiliary plate chain conveyor and the upstream main plate chain conveyor are removed in the drawing).

[0044] Figure 3 It is a state schematic diagram of the left side of the folding push mechanism folding and pushing to the position.

[0045] Figure 4 It is a four-process flow schematic diagram of the wet tissue folding of the present application.

[0046] Figure 5 It is a partial enlarged structural schematic view of the automatic folding and pressing device of the wet tissue of the present application.

[0047] Figure 6 It is a side structural schematic view of the lifting cam of the present application.

[0048] Figure 7 It is a top structural schematic view of the single plate chain on the upstream main plate chain conveyor of the present application.

[0049] Figure 8 It is a three-dimensional structural schematic view of the vertical rotary disc of the present application.

[0050] In the figure, A, wet tissue; A1, three-folded wet tissue; B, external wet tissue automatic stacking machine; C, wet tissue packaging equipment; D, wet tissue feeding equipment; 1, upstream conveying line assembly; 101, upstream main plate chain conveyor; 102, upstream auxiliary plate chain conveyor; 103, upper plate chain of the upstream main plate chain conveyor; 2, downstream conveying line assembly; 3, automatic folding and pressing device of the wet tissue; 4, folding and pressing mechanism; 401, horizontal driving rotary shaft; 402, limiting shaft sleeve; 5, folding power driving mechanism; 501, servo control motor; 502, coupling; 6, self-rotation pushing shifter; 601, vertical rotary disc; 602, horizontal rotary pushing cylinder; 603, outer vertical surface section; 604, inner vertical surface section; 605, transition inclined curved surface; 7, lifting cam; 8, pushing and returning mechanism; 801, pushing plate; 802, guide column; 803, horizontal lifting tray; 804, vertical guide limiting sleeve; 805, outer end linkage shaft; 806, inner end linkage shaft; 807, fixed shaft limiting sleeve; 808, universal rolling guide; 809, spring stopper; 810, return spring; 811, counterweight balancing block; 9, middle positioner of the wet tissue; 901, negative pressure fan; 10, stamping through opening. DETAILED DESCRIPTION

[0051] The embodiments of the technical solutions of the present application will be described in detail below in combination with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application. The specific structure of the present application is shown in Figures 1-8 .

[0052] Example 1:

[0053] The application discloses an automatic wet tissue conveying and folding system, which comprises an upstream conveying line assembly 1, a downstream conveying line assembly 2 and an automatic wet tissue folding and pressing device 3. The automatic wet tissue folding and pressing device 3 is installed between the discharging end of the upstream conveying line assembly 1 and the feeding end of the downstream conveying line assembly 2, and is used for realizing quick folding of each wet tissue conveyed by the upstream conveying line assembly 1, pressing the folded wet tissue and continuously conveying the wet tissue to the downstream conveying line assembly 2. The downstream conveying line assembly 2 is connected with an external wet tissue automatic stacking machine B and a wet tissue packaging equipment C. The whole system cooperates with an external upstream wet tissue feeding equipment D to sequentially and orderly place the wet tissues on the upstream conveying line assembly 1 and continuously convey the wet tissues to the downstream. A general in-place sensor or in-place switch is arranged at each working point, when the wet tissue to be folded is conveyed to the working position of the automatic wet tissue folding and pressing device 3, the automatic wet tissue folding and pressing device 3 folds the wet tissue quickly, and the folding is realized by lifting the corresponding folding edge of the wet tissue, then pushing the wet tissue horizontally, and then pressing the wet tissue, and the folding position is pressed and returned quickly, so that the folding efficiency is improved. Meanwhile, the whole action is completed by using a flat pushing plate 801, so that the flatness of the pressed wet tissue is better guaranteed. The folded wet tissue is continuously conveyed to the downstream conveying line assembly 2, and finally is stacked and packaged by the downstream connected external wet tissue automatic stacking machine B and the wet tissue packaging equipment C.

[0054] In any of the above solutions, preferably, the upstream conveying line assembly 1 comprises a horizontally arranged upstream main plate chain conveyor 101, and upstream auxiliary plate chain conveyors 102 are symmetrically arranged on both sides of the upstream main plate chain conveyor 101. The upstream auxiliary plate chain conveyors 102 and the upstream main plate chain conveyor 101 are synchronously and directionally moved, and the tail end of the upstream main plate chain conveyor 101 is longer than the tail ends of the upstream auxiliary plate chain conveyors 102.

[0055] The middle part of the conveyed wet tissue is placed on the upper surface of the upstream auxiliary plate chain conveyor 102, and the two ends of the conveyed wet tissue are symmetrically laid on the upper surface of the upstream auxiliary plate chain conveyor 102 at corresponding positions.

[0056] The upstream main plate chain conveyor 101 and the two upstream auxiliary plate chain conveyors 102 drive the wet wipes arranged thereon to the downstream. When the upstream conveying assembly 1 conveys the wet wipes, the middle part of the wet wipes is laid on the plate chain of the upstream main plate chain conveyor 101, and the two sides are laid on the plate chain of the upstream auxiliary plate chain conveyor 102. The two upstream auxiliary plate chain conveyors 102 and the upstream main plate chain conveyor 101 are synchronous in the conveying state, so as to ensure the synchronization of the whole wet wipes in the conveying process. When the wet wipes are conveyed to the end of the two upstream auxiliary plate chain conveyors 102, the wet wipes continue to be conveyed upward under the action of the upstream main plate chain conveyor 101 in the middle part. The two upstream auxiliary plate chain conveyors 102 are flush and closely combined with the downstream automatic wet wipe folding and pressing device 3, so as to ensure that the two ends of the wet wipes are smoothly transferred to the corresponding position of the automatic wet wipe folding and pressing device 3 following the movement of the middle part. After the wet wipes to be folded are detected to be in position, the automatic wet wipe folding and pressing device 3 is started to fold the left side and the outer end side, and finally completes the folding and continues to convey to the downstream.

[0057] In any of the above schemes, preferably, the automatic wet wipe folding and pressing device 3 comprises two folding and pressing mechanisms 4 respectively arranged at the end of the upstream auxiliary plate chain conveyor 102 and the left and right sides of the upstream main plate chain conveyor 101. The two folding and pressing mechanisms 4 work alternately and intermittently to fold the left side and the outer end side of the wet wipes without motion interference during the working process. The upper surfaces of the two folding and pressing mechanisms 4 are flush with the upper surfaces of the upstream auxiliary plate chain conveyors 102.

[0058] The folding and pressing mechanism 4 adopts a periodic operation mode of first jacking and pushing inward, and then pressing downward and moving outward to return to the original position to fold and flatten the wet wipes.

[0059] The inner ends of the two folding pushing mechanisms 4 are connected with a folding power driving mechanism 5, which is used to control the alternating movement of the two folding pushing mechanisms 4. The folding pushing mechanisms 4 on the left and right sides work alternately in a mode of one working and the other resting, so that there is no motion interference, and the continuity and fluency of the combination of the two are ensured. When the two folding pushing mechanisms 4 work, and the wet wipes are in a stable and stationary state, the upstream conveying line assembly 1 cooperates with the folding action to achieve a pause. The folding pushing mechanism 4 on the left side first performs the folding work. When folding, the left side of the wet wipe is first lifted to a certain height, and then the inner side is pushed horizontally to achieve folding. Then, the folding mark is pressed flat, and the outer side is moved back to complete the folding action of the left side of the wet wipe. Then, after a short intermittent time, the folding pushing mechanism 4 on the outer end side then performs the folding work. When folding, the outer end side of the wet wipe is first lifted to a certain height, and then the inner side is pushed horizontally to achieve folding. Then, the folding mark is pressed flat, and the outer side is moved back to complete the folding action of the outer end side of the wet wipe. Then, the upstream conveying line assembly 1 moves and conveys the currently folded wet wipe to the downstream conveying line assembly 2 for further downstream conveying. At the same time, the next wet wipe is running to the working position of the wet wipe automatic folding and pressing device 3. At this time, the folding of the wet wipe is continued according to the above folding steps. In this way, the folding action of the batch of wet wipes is completed.

[0060] In any of the above solutions, preferably, the folding power driving mechanism 5 includes two opposite servo control motors 501. The inner ends of the horizontal drive rotating shafts 401 on the folding pushing mechanisms 4 at the corresponding positions are connected with the two servo control motors 501 through couplings 502. The left servo control motor 501 and the outer end side servo control motor 501 are controlled by a program to realize alternating intermittent operation.

[0061] The folding power driving mechanism 5 is used to drive the folding pushing mechanism 4 to rotate periodically. When working, the directional and constant speed rotation of each servo control motor 501 can drive the horizontal drive rotating shaft 401 on the folding pushing mechanism 4 connected therewith to rotate, so as to drive the folding pushing mechanism 4 to realize the periodic folding action of lifting, pushing horizontally on the inner side, then pressing down and moving outward to return to the original position.

[0062] Each folding pushing mechanism is only powered by one servo control motor 501, which is convenient for maintenance and positioning after failure, and has lower maintenance and repair costs. There are no precise and easily damaged components in the entire system transmission, and the overall service life is longer and the maintenance cost is lower.

[0063] Preferably in any of the above solutions, the folding and pressing mechanism 4 comprises a horizontal driving rotating shaft 401, both ends of which are movably sleeved with fixedly arranged limiting shaft sleeves 402, the horizontal driving rotating shaft 401 rotates on the two limiting shaft sleeves 402, a self-rotating pushing device 6 is fixedly installed on the outer end outer side wall of the horizontal driving rotating shaft 401, a lifting cam 7 for lifting is fixedly installed on the middle outer side wall of the horizontal driving rotating shaft 401, the shaft center of the lifting cam 7 is coaxially arranged with the horizontal driving rotating shaft 401, a pressing and returning mechanism 8 is arranged above the lifting cam 7, and the pressing and returning mechanism 8 is used for realizing inward folding and pressing of the wet tissue on the corresponding side.

[0064] The self-rotating pushing device 6 is used for controlling the horizontal movement of the pressing and returning mechanism 8, and the lifting cam 7 is used for controlling the vertical lifting of the pressing and returning mechanism 8.

[0065] When the folding and pressing mechanism 4 works, external power is input through the horizontal driving rotating shaft 401, and the periodic operation of the self-rotating pushing device 6 on the horizontal driving rotating shaft 401 can be driven by the fixed shaft rotation of the horizontal driving rotating shaft 401. When the self-rotating pushing device 6 operates, it can periodically realize the side pushing and returning of the pressing and returning mechanism 8 in the left and right directions, mainly to complete the lateral displacement and return reset action during folding. In addition, the lifting cam 7 which can rotate is arranged at the same time as the rotation of the whole horizontal driving rotating shaft 401. By pre-designing the operation period and motion trail of each component, the lifting cam 7 can drive the pressing and returning mechanism 8 above it to realize lifting and lowering, so as to cope with the lifting and pressing action in the folding process. The mutual cooperation of each component of the whole folding and pressing mechanism 4 can effectively realize the periodic completion of lifting, inside horizontal pushing, and then lowering, outside displacement and returning actions, so as to ensure the normal progress of the folding process.

[0066] Preferably in any of the above solutions, the self-rotating pushing device 6 comprises a vertical turntable 601, the center of the vertical turntable 601 is fixed on the outer side wall of the horizontal driving rotating shaft 401 and coaxially arranged with it, a horizontal rotating pushing cylinder 602 is fixedly installed on the inner side of the vertical turntable 601, the inner end face of the horizontal rotating pushing cylinder 602 is divided into an outer vertical surface section 603 and an inner vertical surface section 604, both the outer vertical surface section 603 and the inner vertical surface section 604 are vertically arranged, an upper flat surface is arranged on the outer side of the upper part of the inner vertical surface section 604, and the end portions at the corresponding positions of the outer vertical surface section 603 and the inner vertical surface section 604 are respectively connected by transition inclined curved surfaces, and the two transition inclined curved surfaces are symmetrically arranged.

[0067] The interval distance between the outer side vertical section 603 and the inner side vertical section 604 is equal to the translation distance of the pushing and returning mechanism 8.

[0068] The rotation pushing and moving device 6 mainly rotates synchronously with the horizontal driving rotation shaft 401, and in the process of rotation, the left and right pushing and moving of the pushing and returning mechanism 8 is realized by the continuous alternation and contact of the outer side vertical section 603, the inner side vertical section 604 and the transition inclined surface with the pushing and returning mechanism 8. When the outer side vertical section 603 contacts with the pushing and returning mechanism 8, the whole pushing and returning mechanism 8 is in the most outer working position (in the state of waiting for side pushing or returning to position). When the transition inclined surface contacts with the pushing and returning mechanism 8, the whole pushing and returning mechanism 8 is in the state of pushing inward or returning outward (in the state of folding or pressing and pushing, or returning after the completion of folding or pressing and pushing). When the inner side vertical section 604 contacts with the pushing and returning mechanism 8, the whole pushing and returning mechanism 8 is in the most inner working position (in the state of folding to position, or in the process of pressing down or in the state of pressing down to position).

[0069] In any of the above schemes, preferably, a plurality of punching through openings 10 are arranged on the surface of each plate chain of the upstream main plate chain conveyor 101 in sequence and at intervals along the width direction of the upstream main plate chain conveyor 101, and a suspended and fixed wet tissue middle positioner 9 is arranged between the upper and lower plate chains of the upstream main plate chain conveyor 101 between the two folding and pushing mechanisms 4. The wet tissue middle positioner 9 can improve the middle stability of the wet tissue during left and right folding by temporarily positioning the middle part of the wet tissue before folding, and prevent passive side movement of the wet tissue.

[0070] When the wet tissues lifted to a certain height on both sides are pushed inward, the wet tissue middle positioner 9 can effectively play a role in middle positioning, so as to prevent the phenomenon of side movement of the wet tissue during folding, and ensure the stable performance of the folding action.

[0071] Embodiment 2:

[0072] A wet tissue automatic conveying and folding system, comprising an upstream conveying line assembly 1, a downstream conveying line assembly 2 and a wet tissue automatic folding and pressing device 3, wherein the wet tissue automatic folding and pressing device 3 is installed between the discharging end of the upstream conveying line assembly 1 and the feeding end of the downstream conveying line assembly 2, and is used to realize the quick folding of each wet tissue A conveyed by the upstream conveying line assembly 1 in sequence, and to press the folded wet tissues to be neat and continue to convey them to the downstream conveying line assembly 2. The downstream conveying line assembly 2 is connected to an external wet tissue automatic stacking machine B and a wet tissue packaging equipment C.

[0073] Preferably in any of the above solutions, the upstream end of the upstream conveying line assembly 1 is configured to be connected with an upstream upper wet tissue feeding device D, wherein the wet tissue feeding device D places the wet tissues A to be processed on the upstream conveying line assembly 1 in an orderly and flat manner.

[0074] Preferably in any of the above solutions, the wet tissue automatic folding and pressing device 3 folds the wet tissues A in a plate pushing and three-fold folding manner during operation, and the folded wet tissues A are in a three-fold folding state and the folds are pressed in order.

[0075] The wet tissues are folded in a plate pushing and three-fold folding manner, and the folded wet tissues are in a three-fold folding state and the folds are pressed in order, which effectively ensures the folding quality.

[0076] Preferably in any of the above solutions, the upstream conveying line assembly 1 comprises a horizontally arranged upstream main plate chain conveyor 101, and an upstream auxiliary plate chain conveyor 102 is symmetrically arranged on both sides of the upstream main plate chain conveyor 101, the two upstream auxiliary plate chain conveyors 102 move synchronously and in the same direction with the upstream main plate chain conveyor 101, and the end of the upstream main plate chain conveyor 101 is longer than the ends of the two upstream auxiliary plate chain conveyors 102.

[0077] The middle part of the conveyed wet tissues A is placed on the upper surface of the upstream auxiliary plate chain conveyor 102, and the two ends of the conveyed wet tissues A are symmetrically laid on the upper surface of the upstream auxiliary plate chain conveyor 102 at the corresponding positions.

[0078] The upstream main plate chain conveyor 101 and the two upstream auxiliary plate chain conveyors 102 jointly drive the wet tissues A arranged thereon to be conveyed downstream.

[0079] When the upstream conveying line assembly 1 conveys the wet tissues, the middle part of the wet tissues is laid on the plate chain of the upstream main plate chain conveyor 101, and the two sides are laid on the plate chains of the upstream auxiliary plate chain conveyors 102. The two upstream auxiliary plate chain conveyors 102 and the upstream main plate chain conveyor 101 are kept synchronous in the conveying state, thereby ensuring the synchronization of the overall conveying of the wet tissues. When the wet tissues are conveyed to the ends of the two upstream auxiliary plate chain conveyors 102, they will continue to be conveyed upward under the action of the upstream main plate chain conveyor 101 at the middle part. The two upstream auxiliary plate chain conveyors 102 are flush and closely fitted with the downstream wet tissue automatic folding and pressing device 3, so that the two ends of the wet tissues can be smoothly transferred to the corresponding positions of the wet tissue automatic folding and pressing device 3 following the movement of the middle part. After the wet tissues to be folded are detected to be in position, the wet tissue automatic folding and pressing device 3 is started to fold the left side and the outer end side, and finally the folding is completed and the wet tissues continue to be conveyed downstream.

[0080] In any of the above solutions, it is preferred that the upper surface of the upstream main plate chain conveyor 101 is lower than the upper surfaces of the two upstream auxiliary plate chain conveyors 102.

[0081] This arrangement can make the middle part of the wet tissue relatively concave, facilitating the left-right translation of the folding and pushing mechanism 4 during the later folding of the wet tissue, and avoiding movement interference during the downward pressing, ensuring the smoothness of the movement and the small height difference of the thickness, which will not affect the normal conveying of the wet tissue.

[0082] In any of the above solutions, it is preferred that the wet tissue automatic folding and pressing device 3 comprises two folding and pushing mechanisms 4 respectively arranged at the ends of the two upstream auxiliary plate chain conveyors 102 and the left and right sides of the upstream main plate chain conveyor 101, and the two folding and pushing mechanisms 4 work alternately and intermittently during operation and complete the left-side folding and outer-end side folding of the wet tissue A without movement interference, and the upper surfaces of the two folding and pushing mechanisms 4 are flush with the upper surface of the upstream auxiliary plate chain conveyor 102.

[0083] The folding and pushing mechanism 4 adopts a periodic operation mode of first jacking, inside pushing, then pressing down, and outside returning to position to realize the folding and flattening of the wet tissue.

[0084] The inner ends of the two folding and pushing mechanisms 4 are connected to the folding power driving mechanism 5, and the folding power driving mechanism 5 is used to control the alternating movement of the two folding and pushing mechanisms 4.

[0085] The left and right folding and pushing mechanisms 4 work alternately in a mode of one working and the other stopping, which can avoid movement interference and ensure the continuity and smoothness when the two folding and pushing mechanisms 4 work together. When the two folding and pushing mechanisms 4 are working and the wet tissue is in a stable and stationary state, the upstream conveying line assembly 1 cooperates with the folding action to stop, the left folding and pushing mechanism 4 first performs the folding operation, which adopts the mode of first jacking the left side of the wet tissue to a certain height, inside pushing to realize folding, then pressing down to flatten the fold, and outside returning to position to complete the folding of the left side of the wet tissue. After a short interval, the outer-end side folding and pushing mechanism 4 then performs the folding operation, which adopts the mode of first jacking the outer-end side of the wet tissue to a certain height, inside pushing to realize folding, then pressing down to flatten the fold, and outside returning to position to complete the folding of the outer-end side of the wet tissue. Then the upstream conveying line assembly 1 moves and conveys the currently folded wet tissue to the downstream conveying line assembly 2 for further downstream conveying, and at the same time, the next wet tissue is running to the working position of the wet tissue automatic folding and pressing device 3. At this time, the folding of the wet tissue is continued according to the above folding steps, and the folding of the batch of wet tissues is completed in this way.

[0086] Preferably, in any of the above solutions, the folding power driving mechanism 5 comprises two phase-opposed servo control motors 501, which are respectively connected to the inner ends of the horizontal driving rotating shafts 401 on the folding push mechanism 4 at the corresponding positions through couplings 502; the left servo control motor 501 and the right servo control motor 501 are alternately intermittently operated by the existing program control.

[0087] The folding power driving mechanism 5 is used to drive the folding push mechanism 4 to periodically operate. When working, the directional and constant-speed rotation of each servo control motor 501 can drive the horizontal driving rotating shafts 401 on the folding push mechanism 4 connected thereto to rotate, so as to drive the folding push mechanism 4 to realize the periodic folding action of lifting, pushing inward, then pressing downward, and moving outward to return to the original position.

[0088] Preferably, in any of the above solutions, in the folding working state, the left folding push mechanism 4 and the right folding push mechanism 4 are spaced apart when moving. After the left folding push mechanism 4 completes a complete wet tissue folding action and returns to the original position, the right folding push mechanism 4 starts to perform and complete a complete wet tissue folding action after a time interval of 0.5-1 seconds. The left folding push mechanism 4 again completes a complete wet tissue folding action and returns to the original position after a time interval of 0.5-1 seconds. The above process is repeated.

[0089] The alternating folding action can effectively ensure that the left folding and the right folding of the wet tissue do not interfere with each other. In addition, the time interval between the two actions is short, so as to effectively ensure the continuity and fluency of the entire folding action.

[0090] Preferably, in any of the above solutions, after the left folding push mechanism 4 and the right folding push mechanism 4 complete the folding of the left and right sides of the same wet tissue, the corresponding in-position switch feeds back to the system and controls the upstream master chain conveyor 101 to continue to convey the next wet tissue A to be folded, and the folded three-fold wet tissue A1 is sent to the downstream conveying line assembly 2.

[0091] Preferably in any of the above solutions, the folding and pressing mechanism 4 comprises a horizontal driving rotating shaft 401, both ends of which are movably sleeved with fixedly arranged limiting shaft sleeves 402, the horizontal driving rotating shaft 401 rotates on the two limiting shaft sleeves 402, a self-rotating pushing device 6 is fixedly installed on the outer end outer side wall of the horizontal driving rotating shaft 401, a lifting cam 7 for lifting is fixedly installed on the middle outer side wall of the horizontal driving rotating shaft 401, the shaft center of the lifting cam 7 is coaxially arranged with the horizontal driving rotating shaft 401, a pressing and returning mechanism 8 is arranged above the lifting cam 7, and the pressing and returning mechanism 8 is used for realizing inward folding and pressing of the wet tissue A on the corresponding side.

[0092] The self-rotating pushing device 6 is used for controlling the horizontal movement of the pressing and returning mechanism 8, and the lifting cam 7 is used for controlling the vertical lifting of the pressing and returning mechanism 8.

[0093] When the folding and pressing mechanism 4 works, external power is input through the horizontal driving rotating shaft 401, and the periodic operation of the self-rotating pushing device 6 on the horizontal driving rotating shaft 401 can be driven by the fixed shaft rotation of the horizontal driving rotating shaft 401. When the self-rotating pushing device 6 operates, it can periodically realize the side pushing and returning of the pressing and returning mechanism 8 in the left and right directions, mainly to complete the lateral displacement and return displacement action during folding. In addition, the lifting cam 7 which can rotate is arranged at the same time as the rotation of the whole horizontal driving rotating shaft 401. By pre-designing the operation period and motion trail of each component, the lifting cam 7 can drive the pressing and returning mechanism 8 above it to realize lifting and lowering, so as to cope with the lifting and pressing action in the folding process. The mutual cooperation of each component of the whole folding and pressing mechanism 4 can effectively realize the periodic completion of lifting, inside horizontal pushing, and then lowering, outside displacement and returning actions, so as to ensure the normal progress of the folding process.

[0094] Preferably in any of the above solutions, the self-rotating pushing device 6 comprises a vertical turntable 601, the center of the vertical turntable 601 is fixed on the outer side wall of the horizontal driving rotating shaft 401 and coaxially arranged with it, a horizontal rotating pushing cylinder 602 is fixedly installed on the inner side of the vertical turntable 601, the inner end face of the horizontal rotating pushing cylinder 602 is divided into an outer vertical surface section 603 and an inner vertical surface section 604, both the outer vertical surface section 603 and the inner vertical surface section 604 are vertically arranged, an upper flat surface is arranged on the outer side upper part of the inner vertical surface section 604, and the end portions at the corresponding positions of the outer vertical surface section 603 and the inner vertical surface section 604 are respectively connected by transition inclined curved surfaces 605, and the two transition inclined curved surfaces 605 are symmetrically arranged.

[0095] The interval distance between the outer side vertical section 603 and the inner side vertical section 604 is equal to the translation distance of the push-return mechanism 8.

[0096] The self-rotation pusher 6 mainly rotates synchronously with the horizontal driving rotation shaft 401, and in the process of rotation, it realizes the left and right direction push of the push-return mechanism 8 by continuously alternating with the corresponding push-return mechanism 8 through the outer side vertical section 603, the inner side vertical section 604 and the transition inclined curved surface 605. When the outer side vertical section 603 contacts with the push-return mechanism 8, the whole push-return mechanism 8 is in the outermost working position (in the state of waiting for side pushing or returning to position). When the transition inclined curved surface 605 contacts with the push-return mechanism 8, the whole push-return mechanism 8 is in the state of advancing inward or returning outward (in the state of folding or pushing down and then returning). When the inner side vertical section 604 contacts with the push-return mechanism 8, the whole push-return mechanism 8 is in the innermost working position (in the state of folding to position or in the process of pushing down or pushing down to position).

[0097] In any of the above schemes, preferably, the push-return mechanism 8 comprises a push plate 801 horizontally arranged at the end of the upstream secondary plate chain conveyor 102 at the corresponding position, a vertical guide column 802 fixedly installed at the bottom of the outer end of the push plate 801, a counterweight balancing block 811 fixedly installed at the bottom of the push plate 801 outside the vertical guide column 802, a horizontal lifting tray 803 fixedly connected to the lower end of the vertical guide column 802, the bottom of the horizontal lifting tray 803 always abutting against the top of the lifting cam 7 below the corresponding position, a vertical guide limiting sleeve 804 sleeved on the outer side wall of the middle part of the vertical guide column 802, coaxially and horizontally arranged outer end linkage shaft 805 and inner end linkage shaft 806 fixedly arranged on the left and right sides of the vertical guide limiting sleeve 804, the outer end linkage shaft 805 and the inner end linkage shaft 806 are coaxially arranged, an axis limiting sleeve 807 movably sleeved on the end outer side wall of the outer end linkage shaft 805 and the inner end linkage shaft 806, a universal rolling guide 808 abutting and cooperating with the outer side vertical section 603, the inner side vertical section 604 and the two transition inclined curved surfaces 605 on the outer end surface of the self-rotation pusher 6 is installed at the outer end of the outer end linkage shaft 805, a spring stop disc 809 is fixedly arranged on the outer side wall of the inner end linkage shaft 806 outside the outer end side of the vertical guide limiting sleeve 804, a return spring 810 is sleeved on the outer side wall of the inner end linkage shaft 806 between the spring stop disc 809 and the outer end side axis limiting sleeve 807, and the two ends of the return spring 810 are respectively abuttingly fixedly connected to the spring stop disc 809 and the outer end side axis limiting sleeve 807 at the corresponding positions.

[0098] The push-return mechanism 8 is mainly pushed up by the lifting of the lifting cam 7 in operation, and the horizontal lifting tray 803 in contact with the lifting cam 7 is pushed up (and lowered by gravity in the lowering process), which drives the guide column 802 on the top to move vertically upward in the vertical guide limiting sleeve 804, and finally drives the upward push plate 801 to be pushed up or pressed down, and the rotation of the self-rotating pusher 6 drives the outer end linkage shaft 805 and the inner end linkage shaft 806 to move inward or outward horizontally, and when the wet wipes are pushed inward, the compression of the return spring 810 can overcome the action of the return spring 810 to complete the side folding in place, and when the self-rotating pusher 6 returns, the outer end linkage shaft 805 and the inner end linkage shaft 806 are pushed outward to the original position under the action of the return spring 810, which completes the return action after the fold is pressed down; because the outer side vertical section 603 and the inner side vertical section 604 are in a vertical plane structure, when the outer side vertical section 603 and the inner side vertical section 604 are in contact with the outer end linkage shaft 805, the entire outer end linkage shaft 805 does not move horizontally upward, and the lifting cam 7 is in a rotating state during the process, so that the guide column 802 is driven to lift in the interval, thereby completing the lifting action of the push plate 801 on the wet wipes and the action of pressing the folded wet wipes after being pushed to the side, and the folding action is continuous by the combination of the side pushing and return actions.

[0099] The universal rolling guide 808 can ensure the smoothness of the outer end linkage shaft 805 and the outer side vertical section 603 and the inner side vertical section 604 and the two transition inclined surfaces 605 on the outer end surface of the self-rotating pusher 6, and reduce the jamming phenomenon.

[0100] In any of the above schemes, preferably, a plurality of stamping through openings 10 are arranged on the surfaces of the plate chains of the upstream main plate chain conveyor 101 in sequence and at intervals along the width direction of the upstream main plate chain conveyor 101, and a wet wipe middle positioner 9 is arranged between the upper and lower plate chains of the upstream main plate chain conveyor 101 between the two folding push mechanisms 4, which is fixedly arranged in the air, and the wet wipe middle positioner 9 improves the middle stability of the wet wipes A during left and right folding by temporarily positioning the middle part of the wet wipes before folding, and prevents passive side movement of the wet wipes.

[0101] When the wet wipes on both sides are pushed inward to a certain height, the wet wipe middle positioner 9 can effectively play a role in middle positioning, thereby preventing the phenomenon of side movement of the wet wipes during folding, and ensuring the stable performance of the folding action.

[0102] In any of the above options, it is preferable that all the chain plates are made of stainless steel. Stainless steel can prevent rust and corrosion, and is also easy to clean and disinfect, making maintenance more convenient and quick.

[0103] In any of the above embodiments, it is preferred that the wet wipe center positioner 9 includes a negative pressure fan 901 suspended and fixed between the upper and lower plates of the upstream main board chain conveyor 101 between the two folding and pressing mechanisms 4. Each negative pressure suction port 902 of the negative pressure fan 901 is arranged facing upward and close to the punched through opening 10 at each upper plate chain. When the negative pressure fan 901 is in operation, it uses the negative pressure suction of each punched through opening 10 to achieve adsorption and positioning of the center of the wet wipe A placed on each plate chain directly above it. The negative pressure adsorption and positioning improves the center stability of the wet wipe A when it is folded left and right and prevents the wet wipe from passively shifting to the side.

[0104] The wet wipe center positioner 9 mainly uses the negative pressure of the negative pressure fan 901 to achieve multi-point negative pressure adsorption of the wet wipe through the various punched through openings 10. The adsorption force can be preset as needed to ensure that the wet wipe is not damaged and can also effectively perform positioning. After the folding action is completed, the negative pressure can be quickly controlled to close, ensuring the smoothness of the wet wipe when continuing to be transported downstream after folding.

[0105] In any of the above embodiments, it is preferred that the horizontal drive rotating shaft 401 rotates to drive the self-rotating pusher 6 to rotate. The rotation of the self-rotating pusher 6 will cause the outer side surface segment 603, the transition inclined curved surface 605, and the inner side surface segment 604 on its outer end face to abut and cooperate with the universal rolling guide 808 in sequence. When the transition inclined curved surface 605 abuts and cooperates with the universal rolling guide 808 in the two rotating states, it will push the entire push return mechanism 8 to translate and reset.

[0106] When the outer facade section 603 transitions to the inner facade section 604 via the transition inclined curved surface 605, it can drive the push plate 801 on the push return mechanism 8 to perform an inward translation to achieve a folding action. When the inner facade section 604 transitions to the outer facade section 603 via the transition inclined curved surface 605, it can drive the push plate 801 on the push return mechanism 8 to perform an outward translation to achieve a return action after pressing down.

[0107] In any of the above embodiments, it is preferred that the push plate 801 on the push return mechanism 8 is flush with the end of the upstream auxiliary plate chain conveyor 102 and there is a gap distance of 3-5mm. The bottom of the push plate 801 is higher than the upper surface of the corresponding plate chain of the upstream main plate chain conveyor 101 and the gap distance is 1-2mm.

[0108] The two upstream sub-plate chain conveyors 102 set here are flush and closely fitted with the downstream automatic wet tissue folding and pressing device 3, so as to ensure that the two ends of the wet tissue are smoothly transferred to the corresponding positions of the automatic wet tissue folding and pressing device 3 following the movement of the middle part, and the automatic wet tissue folding and pressing device 3 is started to perform left folding, outer end side folding after the wet tissue to be folded is detected to move to the position, and finally the folding is completed and the wet tissue is continuously conveyed downstream.

[0109] In any of the above solutions, preferably, the inner end of the push plate 801 is provided with a polished rounded surface, the push plate 801 is a stainless steel plate and the surface is polished.

[0110] The polished plane can effectively ensure its smoothness, facilitating smooth transportation of the wet tissue.

[0111] A position switch for realizing position control is installed at the corresponding working position of the whole system, so as to better cooperate with the execution of the action of the mechanical parts of the whole system. The control part belongs to the conventional technology in the prior art and does not belong to the innovative part of the present application, so it will not be described here.

[0112] Specific working principle:

[0113] The whole system matches the external upstream wet tissue loading equipment D to place the wet tissues in order on the upstream conveying line assembly 1 and continue to convey downstream. Regular in-place sensors or in-place switches are configured at each process point. When the wet tissues to be folded run to the working position of the wet tissue automatic folding and pressing device 3, the wet tissue automatic folding and pressing device 3 will fold the wet tissues quickly. The folding is realized by lifting the corresponding folding edge of the wet tissues first, then pushing them horizontally, and then pressing them down. The folding creases are pressed quickly and returned to the original position. The folding efficiency is improved. At the same time, the whole action is completed by the flat pushing plate 801, which can better ensure the flatness of the wet tissues after being pressed down. The folded wet tissues will continue to be conveyed downstream to the downstream conveying line assembly 2, and finally be stacked and packaged through the downstream connected external wet tissue automatic stacking machine B and wet tissue packaging equipment C. It should be noted that the left and right folding and pushing mechanisms 4 work alternately in one working and the other resting mode, so as not to interfere with each other. The continuity and smoothness of the combination of the two are guaranteed. When the two folding and pushing mechanisms 4 work, the wet tissues are in a stable and stationary state. That is, the upstream conveying line assembly 1 stops working in combination with the folding action. The left folding and pushing mechanism 4 works first. When folding, the left side of the wet tissues is lifted to a certain height first, then pushed horizontally to fold, and then pressed down to flatten the creases, and then moved outward to return to the original position to complete the folding action of the left wet tissues. Then, after a short interval, the right folding and pushing mechanism 4 works. When folding, the outer end of the wet tissues is lifted to a certain height first, then pushed horizontally to fold, and then pressed down to flatten the creases, and then moved outward to return to the original position to complete the folding action of the outer end of the wet tissues. Then, the upstream conveying line assembly 1 moves and conveys the currently folded wet tissues to the downstream conveying line assembly 2 to continue to convey downstream. At the same time, the next wet tissue is running to the working position of the wet tissue automatic folding and pressing device 3. At this time, the folding of the wet tissues is continued according to the above folding steps. In this way, the folding action of the batch of wet tissues is completed.

[0114] The system adopts horizontal conveying state to fold the wet wipes in turn on the left and right sides to form three-fold folded wet wipes, the whole folding process is relatively fast and flexible, and changes the traditional roller type clamping folding mode; the unique folding action design: in this way, the wet wipes are first lifted on the corresponding folding edge, then pushed horizontally, and then pressed downward to realize fast folding and quickly press the folding part and return to the original position, which improves the folding efficiency. At the same time, the whole action is completed by the flat pushing plate 801, which can better ensure the flatness of the wet wipes after being pressed down; the flat pushing plate 801 as a folding execution component, the plane structure can be easily cleaned after long-term use, and the maintenance is convenient and fast; the whole system is installed on the wet wipe conveying line, which can continuously fold the wet wipes in production quickly and periodically, and can continue to convey downstream after folding is completed, without affecting the normal operation of the downstream stacking and packaging process. The whole system has high flexibility and high folding efficiency, and is suitable for large batch wet wipe production workshops; when the system is in folding state, the folding and pressing mechanism 4 at the outer end and the folding and pressing mechanism 4 at the left side are spaced when moving. When the folding and pressing mechanism 4 at the left side completes a complete wet wipe folding action and returns to the original position, the folding and pressing mechanism 4 at the outer end starts to complete a complete wet wipe folding action after 0.5-1 seconds. The folding and pressing mechanism 4 at the left side again completes a complete wet wipe folding action and returns to the original position after 0.5-1 seconds. The system moves in this cycle. The interval time can provide time for the current folded wet wipes and the next wet wipes to be folded to transfer the work position, ensure the connection and cooperation of the whole folding and conveying movement, and improve the smoothness of the whole system. When the system works, the wet wipes are folded in the way of plate type pushing and three-fold folding. The folded wet wipes are in three-fold folding state and the folds are pressed in order, which effectively ensures the folding quality. In order to ensure the stability of the middle part of the wet wipes during folding, a negative pressure type wet wipe middle positioner 9 is also configured in the system, which can better cooperate with the folding and pressing mechanisms 4 at both sides to complete the fast folding of the wet wipes on the left and right sides.

[0115] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can modify the technical solutions described in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, which should be covered in the scope of the claims and description of the present application; any alternative improvement or change made by those skilled in the art to the embodiments of the present application falls within the protection scope of the present application.

[0116] The invention is not detailed in the places where the technology is known to the person skilled in the art.

Claims

1. An automatic wet wipe conveying and folding system, characterized in that: The device includes an upstream conveyor assembly, a downstream conveyor assembly, and an automatic wet wipe folding and pressing device. The automatic wet wipe folding and pressing device is installed between the unloading end of the upstream conveyor assembly and the loading end of the downstream conveyor assembly. The automatic wet wipe folding and pressing device is used to quickly fold each wet wipe conveyed from the upstream conveyor assembly in sequence, press it neatly after folding, and continue to convey it to the downstream conveyor assembly. The downstream of the downstream conveyor assembly is connected to an external automatic wet wipe palletizer and wet wipe packaging equipment. The automatic wet wipe folding and pressing device includes two folding and pressing mechanisms. In the folding working state, after the left folding and pressing mechanism completes a complete wet wipe folding action and returns to its original position, the outer folding and pressing mechanism starts and completes a complete folding action after an interval of 0.5-1 seconds. After an interval of 0.5-1 seconds, the left folding and pressing mechanism completes another wet wipe folding action and returns to its original position, and so on. When folding, first lift, push, and then press down the corresponding folding edge of the wet wipe to quickly fold it, and then press out the crease of the folded part by pressing quickly and returning it to its original position. The upstream conveyor assembly includes an upstream main board chain conveyor and two upstream auxiliary board chain conveyors; The folding and pressing mechanism includes a pressing and returning mechanism comprising a pressing plate horizontally positioned at the end of the upstream auxiliary plate chain conveyor. A vertical guide column is fixed to the bottom of the outer end of the pressing plate. A horizontal lifting tray is fixed to the lower end of the guide column, and the bottom of the horizontal lifting tray always abuts against the top of the lifting cam below it. A vertical guide limiting sleeve is fitted onto the outer wall of the middle part of the guide column, with an outer end linkage shaft and an inner end linkage shaft fixed on the left and right sides respectively. The outer end linkage shaft and the inner end linkage shaft are coaxially arranged and their respective ends are externally... A certain axis limiting sleeve is movably sleeved on each side wall. A universal rolling guide is installed at the outer end of the outer linkage shaft, which abuts against the outer vertical section, inner vertical section and two transition inclined curved surfaces of the self-rotating pusher of the folding and pressing mechanism. A spring retainer is fixed on the outer wall of the inner linkage shaft at the outer end of the vertical guide limiting sleeve. A return spring is sleeved on the outer wall of the inner linkage shaft between the spring retainer and the fixed axis limiting sleeve at the outer end. The two ends of the return spring abut against the fixed spring retainer and the end of the fixed axis limiting sleeve at the outer end, respectively. Several stamped through openings are arranged sequentially along the width direction on the surface of each section of the upstream main chain conveyor. A suspended and fixed wet wipe center positioner is provided between the upper and lower chain plates of the upstream main chain conveyor. The wet wipe center positioner includes a negative pressure fan suspended and fixed between the upper and lower chain plates of the upstream main chain conveyor. The negative pressure fan's negative pressure suction port is arranged upward and close to each stamped through opening. When the negative pressure fan is in operation, it uses negative pressure suction through various punched through-openings to adsorb and position the wet wipe in the middle, improving the stability of the wet wipe in the middle when it is folded left and right and preventing the wet wipe from passively shifting to the side.

2. The automatic wet wipe conveying and folding system according to claim 1, characterized in that: The two upstream auxiliary plate chain conveyors and the upstream main plate chain conveyor move synchronously and in the same direction, and the end of the upstream main plate chain conveyor is longer than the end of the two upstream auxiliary plate chain conveyors. The middle part of the conveyed wet wipes is placed on the upper surface of the upstream main board chain conveyor, and the two ends of the conveyed wet wipes are symmetrically laid on the upper surface of the upstream secondary board chain conveyor at corresponding positions. The upstream main board chain conveyor and the two upstream auxiliary board chain conveyors work together to drive the wet wipes arranged on them to be transported downstream.

3. The automatic wet wipe conveying and folding system according to claim 2, characterized in that: The upper surface of the upstream main board chain conveyor is lower than the upper surfaces of the two upstream auxiliary board chain conveyors.

4. The automatic wet wipe conveying and folding system according to claim 3, characterized in that: The two folding and pressing mechanisms work alternately and intermittently to complete the left-side folding and outer-end folding of the wet wipes, and there is no motion interference during the operation. The upper surfaces of the two folding and pressing mechanisms are flush with the upper surface of the upstream auxiliary plate chain conveyor. The folding and pressing mechanism uses a cyclical operation method of first lifting, then pushing inward, then pressing down and moving outward back to its original position to fold and flatten the wet wipes. The inner ends of both folding and pressing mechanisms are connected to a folding power drive mechanism, which is used to control the two folding and pressing mechanisms to achieve alternating movement.

5. The automatic wet wipe conveying and folding system according to claim 4, characterized in that: The folding power drive mechanism includes two servo control motors arranged back to back. The two servo control motors are respectively connected to the inner end of the horizontal drive rotating shaft on the folding push mechanism at the corresponding position through a coupling. The servo control motor on the left side and the servo control motor on the outer side are alternately and intermittently operated by program control.

6. The automatic wet wipe conveying and folding system according to claim 5, characterized in that: The folding and pressing mechanism includes a horizontal drive rotating shaft, with fixed limiting bushings movably sleeved at both ends of the horizontal drive rotating shaft. The horizontal drive rotating shaft rotates around a fixed axis within the two limiting bushings. A self-rotating pusher is fixedly installed on the outer side wall of the outer end of the horizontal drive rotating shaft. A lifting cam for lifting is fixedly installed on the outer side wall of the middle part of the horizontal drive rotating shaft. The axis of the lifting cam is coaxial with the horizontal drive rotating shaft. A pushing and returning mechanism is provided above the lifting cam. The pushing and returning mechanism is used to fold and press the wet wipe on the corresponding side inward.

7. The automatic wet wipe conveying and folding system according to claim 6, characterized in that: The self-rotating pusher includes a vertical turntable, the center of which is fixed to the outer wall of the horizontal drive rotation shaft and coaxially arranged therewith. A horizontal rotating pusher cylinder is fixedly installed on the inner side of the vertical turntable. The inner end face of the horizontal rotating pusher cylinder is divided into an outer vertical section and an inner vertical section. Both the outer vertical section and the inner vertical section are vertically arranged. The ends of the corresponding positions of the outer vertical section and the inner vertical section are respectively connected by transition inclined curved surfaces. The two transition inclined curved surfaces are symmetrically arranged. The distance between the outer facade section and the inner facade section is equal to the translation distance of the push-back mechanism.

8. The automatic wet wipe conveying and folding system according to claim 7, characterized in that: The horizontal drive rotating shaft drives the self-rotating pusher to rotate. The rotation of the self-rotating pusher enables the outer vertical section, the transition inclined curved surface, and the inner vertical section on its outer end face to abut and cooperate with the universal rolling guide in sequence. When the transition inclined curved surface abuts and cooperates with the universal rolling guide in the two rotating states, the translation and reset of the entire push return mechanism can be realized.

9. The automatic wet wipe conveying and folding system according to claim 8, characterized in that: The push plate on the push-back mechanism is flush with the end of the upstream auxiliary plate chain conveyor and there is a gap of 3-5mm. The bottom of the push plate is higher than the upper surface of the corresponding plate chain of the upstream main plate chain conveyor and the gap is 1-2mm.

10. The automatic wet wipe conveying and folding system according to claim 9, characterized in that: The inner end of the push plate is provided with a rounded curved surface that has been polished. The push plate is made of stainless steel and all surfaces have been polished.

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