Preheating sealing device for multi-column packaging machine

Abstract

The utility model discloses a preheating sealing device for a multi-column packaging machine, which comprises a longitudinal sealing support mechanism, a longitudinal sealing forming mechanism, a far longitudinal sealing mechanism, a longitudinal sealing edge guide mechanism, a film guide roller mechanism, a longitudinal sealing preheating mechanism, a longitudinal sealing shutter mechanism and a longitudinal sealing sealing mechanism, and the whole device is fixed on the packaging machine by the longitudinal sealing support mechanism. According to the utility model, heating and sealing are shared in mutually independent mechanisms, the sealing temperature and the sealing pressure can be independently controlled, and the installation and debugging processes are convenient. A compression roller type rolling sealing mode is adopted, overlapping and reciprocating phenomena do not exist in the rolling process, the bag making efficiency is improved, and meanwhile the packaging effect is guaranteed. In the preheating mechanism, a packaging film passes through a gap between two sealing blocks at a constant speed without substantial contact, impact change of alternating pressure on the sealing blocks of a heating mold is avoided, continuous heating and rolling film pressing are achieved, continuous film feeding is achieved without considering bag length limitation, packaging quality is guaranteed, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a packaging machine, and more specifically, to a preheating and sealing device for a multi-row packaging machine used in the production equipment of bagged food or pharmaceutical packaging machinery. Background Technology

[0002] In existing packaging production machinery, multi-row packaging machines typically employ intermittent heat sealing during bag formation. The heated sealing block presses the longitudinal sealing edge of the packaging film firmly against the mold in front of the bag forming device. In actual production, depending on the material of the packaging film, a certain clamping time is required. To achieve a tight and aesthetically pleasing seal, it's necessary to increase the sealing pressure while ensuring sufficient clamping time and heating temperature. When dealing with liquid products where the film itself has a certain thickness or special material, sufficient sealing conditions necessitate sacrificing the time consumed by various mechanisms during operation, significantly reducing the production speed of the multi-row packaging machine. Furthermore, due to structural limitations, this sealing device requires precise machining, surface finish, and fit accuracy of the contact surfaces of the sealing components; otherwise, the sealing effect is difficult to guarantee, leading to high manufacturing costs for the components. Because this heat sealing method requires the sealing block and mold block to be longer than the maximum bag length to accommodate different bag lengths, repeated heat sealing is inevitable. Therefore, achieving a seamless connection of the longitudinal sealing edge is difficult, necessitating only flat sealing. Furthermore, the packaging machines currently on the market all use a single-channel horizontal sealing mechanism that moves up and down to pull the film and seal intermittently. This intermittent vertical sealing method is not suitable for continuous sealing production modes and cannot meet the requirements of high speed, high quality, and long-term stability of packaging equipment. Utility Model Content

[0003] In view of the above-mentioned prior art, this utility model provides a preheating and sealing device for multi-row packaging machines. It has a reasonable structure, high cost performance, and is easy to install and adjust. The device is suitable for continuous sealing production mode and can meet the requirements of high speed, high quality and long-term stability of packaging equipment.

[0004] To address the aforementioned technical problems, this utility model proposes a preheating and sealing device for a multi-row packaging machine, comprising a longitudinal sealing support mechanism, a longitudinal sealing forming mechanism, a remote longitudinal sealing mechanism, a longitudinal sealing edge guiding mechanism, a guide roller mechanism, a longitudinal sealing preheating mechanism, a longitudinal sealing opener / closer mechanism, and a longitudinal sealing mechanism. The structure and relative positions of the above mechanisms are as follows:

[0005] The longitudinal sealing support mechanism includes a longitudinal sealing back plate. A pair of left guide blocks are fixed on the front and rear sides of the left end of the longitudinal sealing back plate. Two linear bearings A are provided through the longitudinal sealing back plate and the left guide blocks. A pair of right guide blocks are fixed on the front and rear sides of the right end of the longitudinal sealing back plate. Three linear bearings B are provided through the longitudinal sealing back plate and the right guide blocks. The bottom of the left and right guide blocks is flush with the bottom surface of the longitudinal sealing back plate. A longitudinal sealing support seat is fixed on the bottom surface of each end of the longitudinal sealing back plate.

[0006] The longitudinal sealing forming mechanism includes a central connecting plate fixed to the front of the longitudinal sealing back plate. A packaging film inlet plate is fixed on the top of the central connecting plate. The packaging film inlet plate has N grooves with forward-facing openings. The upper front part of the packaging film inlet plate is designed as an inclined surface intersecting the grooves, and the upper part of the grooves is the packaging film inlet. N forming units are provided in front of the central connecting plate. Each forming unit includes a front forming unit block and a rear forming unit block. The front forming unit block and the rear forming unit block each have longitudinal semi-circular grooves on their opposite longitudinal surfaces. The front forming unit block and the rear forming unit block are assembled in pairs according to the longitudinal semi-circular grooves to form a longitudinally continuous cylindrical channel. The position of the cylindrical channel of the N forming units relative to the N grooves on the packaging film inlet plate is specified. After alignment, a feeding tube is inserted, the outer diameter of which is smaller than the inner diameter of the cylindrical channel, thus forming an annular gap between the feeding tube and the cylindrical channel for the packaging film to pass through; the bottom of the semi-circular groove of the forming device front block is provided with a narrow groove A, for the back sealing edge of the packaging film to protrude from the narrow groove A, and the two back sealing edges are aligned and joined together; a film receiving frame plate is provided on the packaging film inlet plate in front of the bottom of the groove, and film receiving brackets are installed at both ends of the film receiving frame plate. The film receiving brackets are fixed to the front of the longitudinal sealing back plate. N film receiving pieces are provided on the film receiving frame plate, corresponding one-to-one with the N groove positions. A narrow groove B is provided behind the film receiving pieces, and the opening direction of the narrow groove B is consistent with the tangential normal of the feeding tube;

[0007] The longitudinal sealing mechanism includes two longitudinal sealing guide shafts A mounted on two linear bearings A in the longitudinal sealing support mechanism, and three longitudinal sealing guide shafts B mounted on three linear bearings B in the longitudinal sealing support mechanism. A longitudinal left connecting plate is fixed to the rear end of each of the two longitudinal sealing guide shafts A, and a rotating arm fixing block is fixed to the front end of each of the three longitudinal sealing guide shafts B. A longitudinal sealing side rotating shaft is mounted on the rotating arm fixing block. A longitudinal right connecting plate is fixed to the rear end of each of the three longitudinal sealing guide shafts B, and a longitudinal connecting beam connects the left and right longitudinal connecting plates. A longitudinal cylinder is located at the front of the left end of the longitudinal sealing back plate, and the cylinder rod of the longitudinal cylinder passes through the longitudinal sealing back plate and connects to the longitudinal connecting beam. The longitudinal sealing preheating mechanism includes a longitudinal sealing main plate and N sets of preheating molds. The longitudinal sealing main board has a rotating arm connecting block fixed to its right end; a longitudinal sealing slide block A is installed on each of the left and right sides of the longitudinal sealing main board, and a longitudinal sealing cylinder A is installed on the right end of the longitudinal sealing main board. A longitudinal sealing guide shaft A that can slide left and right is installed between the two longitudinal sealing slide blocks A through a linear bearing. The cylinder rod of the longitudinal sealing cylinder A is connected to the right end of the longitudinal sealing guide shaft A; a longitudinal sealing slide block B is installed on each of the left and right sides of the lower part of the longitudinal sealing main board, and a longitudinal sealing cylinder B is installed on the left end of the lower part of the longitudinal sealing main board. A longitudinal sealing guide shaft B that can slide left and right is installed between the two longitudinal sealing slide blocks B through a linear bearing. The cylinder rod of the longitudinal sealing cylinder B is connected to the left end of the longitudinal sealing guide shaft B; the rear part of the longitudinal sealing main board is provided with N preheating module positioning holes;

[0008] The preheating module includes heating block A, heating block B, and a longitudinal sealing rotating shaft. Longitudinal sealing heating rods are embedded in the heads of heating blocks A and B. Through holes are provided in the waist portions of both heating blocks A and B. An upper fork is provided at the tail of heating block A, and a lower fork is provided at the tail of heating block B. The upper and lower forks have forward-facing U-shaped fork openings. The vertical distance between the upper and lower forks is greater than the thickness of the longitudinal sealing main board. The upper fork is located above the longitudinal sealing main board, and the lower fork is located below it. The through holes in the waist portions of heating blocks A and B are aligned with the preheating module positioning holes of the longitudinal sealing main board. A moving shaft passes through it; heating blocks A and B are arranged in a scissor-like configuration, with their heating surfaces facing each other and an equidistant gap between them; the narrow groove A protrudes from the front of the longitudinal forming device's front block, and the back sealing edge, which is placed in the gap between the two heating surfaces; an upper fork execution-positioning structure is provided between the longitudinal sealing guide shaft A and the upper part of the longitudinal sealing main board, and a lower fork execution-positioning structure is provided between the longitudinal sealing guide shaft B and the lower part of the longitudinal sealing main board. Under the drive of the longitudinal sealing cylinders A and B, the heating blocks A and B are opened or closed; the rotating arm connecting block is hinged to the longitudinal sealing edge rotating shaft.

[0009] The longitudinal sealing and closing mechanism includes a main longitudinal sealing and closing block, a secondary longitudinal sealing and closing block, and a longitudinal sealing and closing fork. The main longitudinal sealing and closing block has a fork groove running through its lower middle section, and a through groove running through its front and back, located at the middle right side. The fork is connected to the fork groove via a shaft hole. A blind hole A is located on the top surface of the left side of the fork, and a blind hole B, aligned vertically with blind hole A, is located on the bottom surface of the through groove. A closing and closing spring is embedded between blind hole A and blind hole B. Under the action of the closing and closing spring, the right end of the fork remains in a raised position. A wedge-shaped block is provided on the left side of the auxiliary block, and the bottom of the wedge-shaped block has a groove. The height of the wedge-shaped block is the same as the height of the through groove on the right side of the main block of the longitudinal sealing opener. A longitudinal sealing opener locking block is installed on the front of the auxiliary block, and a raised baffle is provided on the rear side of the locking block. A screw is fixed on the rear side of the raised baffle, and a rubber stop is provided on the screw. The rubber stop is in close contact with the front of the main block of the longitudinal sealing opener, and the front of the main block of the longitudinal sealing opener is flush with the front of the auxiliary block. The main block of the longitudinal sealing opener is connected to the shaft head at the front end of the longitudinal sealing guide shaft A by a shaft hole. The auxiliary block of the longitudinal sealing opener is fixedly connected to the left end of the main longitudinal sealing plate.

[0010] The longitudinal sealing mechanism includes roller connecting blocks fixed at both ends of the longitudinal sealing back plate, and a longitudinal sealing bar connected between the roller connecting blocks at both ends. The longitudinal sealing bar is located at the lower end of the forming device of the longitudinal sealing forming mechanism. A roller adjusting block is provided between the longitudinal sealing bar and the roller connecting block. N pressure roller groups are installed on the longitudinal sealing bar.

[0011] The pressure roller assembly includes a pressure block and two parallel longitudinal sealing pressure rollers, A and B. The longitudinal sealing pressure roller A passes through a circular bearing hole on the longitudinal sealing rod, extending from the front to the back. The longitudinal sealing pressure roller B passes through an elongated hole A on the longitudinal sealing rod, extending from the front to the back. The longitudinal sealing rod has an elongated hole B that intersects the elongated hole A perpendicularly and passes through the top and bottom of the longitudinal sealing rod. A pin hole is located at the front of the longitudinal sealing rod and below the longitudinal sealing pressure roller B. The upper part of the pressure block has a shaft hole that fits with the longitudinal sealing pressure roller B with a clearance fit. The lower part of the pressure block has a through hole. The pressure block is assembled onto the longitudinal sealing pressure roller B through the upper through hole. Simultaneously, the pressure... A pressure-pressing rotating shaft is installed in the through hole and pin hole at the bottom of the film block, thereby hinged the film block to the elongated hole B through the pressure-pressing rotating shaft; each of the front and rear ends of the longitudinal sealing pressure-pressing shaft A and the longitudinal sealing pressure-pressing shaft B is provided with a bearing group consisting of two bearings respectively, and a pressure-pressing shaft retainer is provided at the outer end of the rear bearing group to make the two bearing groups aligned front and rear; a pressure-pressing positioning block is provided at the bottom of the longitudinal sealing bar, and an adjusting bolt is provided between the pressure-pressing positioning block and the lower part of the film block, and a pressure-pressing spring is provided on the adjusting bolt; rotating the adjusting bolt makes the front and rear bearing groups of the longitudinal sealing pressure-pressing shaft A and the longitudinal sealing pressure-pressing shaft B fit together; the tangent of the N bearing groups at the rear end of the N pressure roller groups is aligned with the symmetry line of the narrow groove A in front of the front block of the N forming devices;

[0012] The longitudinal sealing guide mechanism includes brackets fixed to the front ends of two roller connecting blocks, and a longitudinal sealing guide connecting plate connected between the two brackets. The longitudinal sealing guide connecting plate is located below the longitudinal sealing mechanism. N guide retaining rings are fixed on the longitudinal sealing guide connecting plate. The guide retaining rings are arc-shaped retaining rings. The N guide retaining rings respectively wrap around N feeding tubes, pressing down the sealed back sealing edge so that it adheres to the tubular packaging film.

[0013] The guide roller mechanism includes a pressure roller beam fixed between two supports. The pressure roller beam is located below the longitudinal sealing guide mechanism. N sets of longitudinal sealing pressure rollers are provided on the pressure roller beam. Each longitudinal sealing pressure roller set includes two linear bearings passing through the pressure roller beam. A longitudinal sealing pressure roller guide shaft is provided in the linear bearing. A pressure roller tensioning block is fixedly connected to the front end of the two longitudinal sealing pressure roller guide shafts. A longitudinal sealing pressure roller seat is provided at the rear end of the two longitudinal sealing pressure roller guide shafts. A longitudinal sealing pressure roller is provided in the longitudinal sealing pressure roller seat. A pressure roller spring is fitted on the longitudinal sealing pressure roller guide shaft between the longitudinal sealing pressure roller seat and the pressure roller beam. The outer rotating surface of the longitudinal sealing pressure roller is a concave arc surface, which matches the outer rotating surface of the feed tube.

[0014] Furthermore, in the preheating and sealing device for a multi-row packaging machine described in this utility model, wherein:

[0015] On the top of the longitudinal sealing main board: the longitudinal sealing guide shaft A passes through the U-shaped fork openings of all the upper forks of the N preheating modules. The upper fork execution-positioning structure includes a longitudinal sealing left retaining ring and a longitudinal sealing right retaining ring, which are respectively fixed on the longitudinal sealing guide shaft A and located on the left and right sides of the upper fork. A longitudinal sealing compression spring is provided between the upper fork and the longitudinal sealing left retaining ring. The upper fork and the longitudinal sealing right retaining ring are kept in contact. An L-shaped longitudinal sealing positioning plate is installed on the top of the longitudinal sealing main board and on the right side of the upper fork. Below the longitudinal sealing main board: the longitudinal sealing guide shaft B passes through the U-shaped fork openings of all the lower forks of the N preheating modules. The lower fork execution-positioning structure includes a longitudinal sealing left retaining ring and a longitudinal sealing right retaining ring, which are respectively fixed on the longitudinal sealing guide shaft B and located on the left and right sides of the lower fork. A longitudinal sealing compression spring is provided between the lower fork and the longitudinal sealing right retaining ring. The lower fork and the longitudinal sealing left retaining ring are kept in contact. An L-shaped longitudinal sealing positioning plate is installed below the longitudinal sealing main board and on the left side of the lower fork.

[0016] In the longitudinal sealing mechanism, a set of bearings located behind the longitudinal sealing bar is positioned in front of the feed tube extending from the bottom of the longitudinally penetrating cylindrical channel formed by the joining and assembly of the front block and the rear block of the molding unit. The bearings are arranged symmetrically to the left and right of the position of the narrow groove A in front of the front block of the molding unit, so that the longitudinal sealing edge of the packaging bag after wrapping the feed tube is sandwiched between the two bearings in this set.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model discloses a preheating and sealing device for multi-row packaging machines, which can be used for longitudinal preheating and sealing of continuous strip packaging machines. The device has a simple and compact structure, reliable operation, and separates heating and sealing into two independent mechanisms. In this way, the sealing temperature and sealing pressure can be controlled independently, and the installation and debugging process is convenient.

[0019] The roller-type sealing method used in this invention can achieve the required longitudinal sealing edge texture by setting different patterns on the roller. Since there is no overlap or reciprocating motion during the roller pressing process, bag-making efficiency is improved while ensuring packaging quality. In the preheating mechanism, because the packaging film moves uniformly across the gap between the two sealing blocks without actual contact, the impact of alternating pressure on the heating mold sealing blocks is avoided. The lifespan loss of important parts is negligible, and the requirements for the surface roughness and processing precision of the sealing position of the parts are reduced. Simultaneously, this design achieves the structural characteristics of continuous heating and rolling film pressing. The two independent mechanisms can be adjusted separately. Without considering bag length limitations, it achieves continuous film feeding to ensure sealing quality while significantly improving production speed and reducing installation and debugging costs, thus meeting market demands. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the preheating and sealing device for a multi-row packaging machine according to this utility model;

[0021] Figure 2 yes Figure 1 The diagram shown is a structural schematic of the preheating sealing device viewed from below.

[0022] Figure 3 yes Figure 2 A schematic diagram of the preheating sealing device from another perspective;

[0023] Figure 4 yes Figure 1 The front view of the preheating sealing device is shown.

[0024] Figure 5 yes Figure 1 The top view of the preheating sealing device shown;

[0025] Figure 6 yes Figure 1 The preheating sealing device shown is a bottom view.

[0026] Figure 7 yes Figure 1 A schematic diagram of the longitudinal sealing support mechanism 100 and the distal longitudinal sealing mechanism 300 shown in the figure;

[0027] Figure 8 yes Figure 7 A structural schematic diagram of the longitudinal sealing support mechanism 100 and the distal longitudinal sealing mechanism 300 from another perspective;

[0028] Figure 9 yes Figure 1 A schematic diagram of the longitudinal sealing forming mechanism 200 shown in the figure;

[0029] Figure 10 yes Figure 9 A schematic diagram of the partial structure shown in section A;

[0030] Figure 11 yes Figure 9 A schematic diagram of the partial structure shown in section B;

[0031] Figure 12 yes Figure 9 A schematic diagram of the longitudinal sealing forming mechanism 200 from another perspective;

[0032] Figure 13 yes Figure 1 A schematic diagram of the longitudinal sealing guide mechanism 400 shown in the figure;

[0033] Figure 14 yes Figure 1A schematic diagram of the guiding roller mechanism 500 shown in the figure;

[0034] Figure 15 yes Figure 14 An enlarged view of the pressure roller assembly shown in the diagram;

[0035] Figure 16 yes Figure 14 A schematic diagram of the guide roller mechanism 500 from another perspective.

[0036] Figure 17 yes Figure 1 A schematic diagram of the longitudinal sealing preheating mechanism 600 shown in the figure;

[0037] Figure 18 yes Figure 17 Enlarged view of the local structure shown in section C;

[0038] Figure 19 yes Figure 17 A schematic diagram of the longitudinal sealing preheating mechanism 600 from another perspective;

[0039] Figure 20 yes Figure 19 Enlarged view of the local structure shown in section D;

[0040] Figure 21 yes Figure 18 A schematic diagram of the preheating module 608 shown in the figure;

[0041] Figure 22 yes Figure 21 A structural schematic diagram of the preheating module 608 shown from another perspective;

[0042] Figure 23 yes Figure 1 and Figure 3 A schematic diagram of the longitudinal sealing opener / closer mechanism 700 shown in the figure;

[0043] Figure 24 yes Figure 23 A structural schematic diagram of the longitudinal sealing opener / closer mechanism 700 from another perspective;

[0044] Figure 25 yes Figure 24 A schematic diagram of the structure of the longitudinal sealing opener fork 704 shown in the figure;

[0045] Figure 26 yes Figure 24 A schematic diagram of the structure of the main block 701 of the longitudinal sealing opener shown in the figure;

[0046] Figure 27 yes Figure 24 A schematic diagram of the structure of the longitudinal sealing switch sub-block 702 shown in the figure;

[0047] Figure 28 yes Figure 27 A schematic diagram of the longitudinal sealing switch sub-block 702 from another perspective;

[0048] Figure 29 yes Figure 23 A schematic diagram of the left side of the longitudinal sealing opener / closer mechanism 700 shown;

[0049] Figure 30 yes Figure 24 The longitudinal sealing opener mechanism 700 is shown in a cross-sectional view after the longitudinal sealing opener main block 701 is cut open.

[0050] Figure 31 yes Figure 23 The diagram shows the working principle of the longitudinal sealing opener / closer mechanism 700.

[0051] Figure 32 yes Figure 1 A schematic diagram of the longitudinal sealing forming mechanism 200 and the longitudinal sealing closing mechanism 800 shown in the figure;

[0052] Figure 33 yes Figure 32 A schematic diagram showing the positional relationship between the bearing assembly and the front block of the forming device in the pressure roller assembly shown in section E;

[0053] Figure 34 yes Figure 32 A schematic diagram of the longitudinal sealing mechanism 800 and the feed pipe 204 shown in the figure;

[0054] Figure 35 yes Figure 34 A structural schematic diagram of the longitudinal sealing mechanism 800 and the feed tube 204 from another perspective;

[0055] Figure 36 yes Figure 35 A schematic diagram of the longitudinal sealing bar 804 and one of the pressure roller groups shown in the figure;

[0056] Figure 37 yes Figure 36 Enlarged view of the partial structure of the front part of the pressure roller group shown in section F;

[0057] Figure 38 yes Figure 36 Enlarged view of the relevant holes on the longitudinal sealing bar 804 shown in section G;

[0058] Figure 39 yes Figure 36 A structural schematic diagram of the longitudinal sealing bar 804 and one of the pressure roller groups from another perspective;

[0059] Figure 40 yes Figure 39 A magnified view of the rear part of the pressure roller assembly shown in section H.

[0060] Explanation of reference numerals in the diagram: 100 - Longitudinal sealing support mechanism; 200 - Longitudinal sealing forming mechanism; 300 - Remote longitudinal sealing mechanism.

[0061] 400 - Longitudinal sealing guide mechanism; 500 - Film guide roller mechanism; 600 - Longitudinal sealing preheating mechanism; 700 - Longitudinal sealing opener / closer mechanism; 800 - Longitudinal sealing closing mechanism.

[0062] 101-Longitudinal sealing support base; 102-Longitudinal sealing back plate; 103-Right guide block A; 104-Right guide block B; 105-Left guide block A; 106-Left guide block B; 201-Intermediate connecting fixing plate; 202-Packaging film inlet plate; 203-Film receiving bracket

[0063] 204 - Feeding pipe; 205 - Film receiving frame plate; 206 - Film receiving sheet

[0064] 207 - Front block of the molding machine; 208 - Rear block of the molding machine; 209 - Groove

[0065] 210-Narrow Slit A 211-Narrow Slit B 301-Longitudinal Cylinder 302-Longitudinal Left Connecting Plate 303-Longitudinal Right Connecting Plate

[0066] 304 - Longitudinal connecting beam; 3051 - Longitudinal sealing guide shaft A; 3052 - Longitudinal sealing guide shaft B; 306 - Rotating arm fixing block; 307 - Longitudinal sealing edge rotating shaft; 308 - Self-lubricating bushing.

[0067] 401 - Longitudinal sealing guide connecting plate; 402 - Guide retaining ring; 450 - Bracket

[0068] 501 - Longitudinal sealing roller; 502 - Longitudinal sealing roller seat; 503 - Linear bearing

[0069] 504 - Pressure roller spring; 505 - Pressure roller crossbeam; 506 - Pressure roller tensioning block

[0070] 507 - Longitudinal sealing roller guide shaft; 508 - Longitudinal sealing roller pin shaft

[0071] 601-Rotating arm connecting block; 602-Longitudinal sealing main board; 6031-Longitudinal sealing cylinder A; 6032-Longitudinal sealing cylinder B; 6041-Longitudinal sealing cylinder A pad; 6042-Longitudinal sealing cylinder B pad; 6051-Longitudinal sealing guide shaft A; 6052-Longitudinal sealing guide shaft B; 6061-Longitudinal sealing slide A; 6062-Longitudinal sealing slide B; 607-Longitudinal sealing positioning block; 608-Preheating module

[0072] 6091-Longitudinal sealing and sealing left retaining ring 6092-Longitudinal sealing and sealing right retaining ring 610-Longitudinal sealing compression spring

[0073] 6081-Heating Block A; 6082-Heating Block B; 6083-Longitudinal Sealing Heating Rod

[0074] 6084 - Longitudinal sealing rotating shaft; 6085 - Longitudinal rotating shaft sleeve; 6086 - Longitudinal sealing baffle plate

[0075] 60871 - Upper Shift Fork 60872 - Lower Shift Fork

[0076] 701 - Main block of longitudinal sealing switch; 702 - Sub-block of longitudinal sealing switch; 703 - Locking block of longitudinal sealing switch; 704 - Fork of longitudinal sealing switch; 705 - Rubber bolt stop; 706 - Pin of longitudinal sealing switch; 707 - Switch compression spring; 708 - Fork groove; 709 - Through groove

[0077] 710-Blind Hole A 711-Blind Hole B 712-Wedge Block

[0078] 713 - Groove 714 - Raised baffle

[0079] 801-Roller connecting block; 802-Roller adjusting block; 803-Longitudinal sealing and pressing shaft A; 8032-Longitudinal sealing and pressing shaft B; 804-Longitudinal sealing bar; 805-Pressure block.

[0080] 806 - Pressing and positioning block; 807 - Adjusting bolt; 8071 - Shoulder

[0081] 808 - Pressure spring; 809 - Pressure rotating shaft; 810 - Bearing

[0082] 811-Pressure film shaft retainer; 812-Elongated hole B; 813-Circular bearing hole

[0083] 814-Elongated A

[0084] 815-Pin Hole Detailed Implementation

[0085] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0086] like Figures 1 to 6As shown, this utility model proposes a preheating and sealing device for a multi-row packaging machine, including a longitudinal sealing support mechanism 100, a longitudinal sealing forming mechanism 200, a remote longitudinal sealing mechanism 300, a longitudinal sealing edge guiding mechanism 400, a guide film roller mechanism 500, a longitudinal sealing preheating mechanism 600, a longitudinal sealing opener / closer mechanism 700, and a longitudinal sealing and sealing mechanism 800. The general layout of the above mechanisms is as follows: the longitudinal sealing forming mechanism 200 and the remote longitudinal sealing mechanism 300 are located at the rear end of the longitudinal sealing support mechanism 100, the longitudinal sealing opener / closer mechanism 700 is located at the front end of the remote longitudinal sealing mechanism 300, the longitudinal sealing preheating mechanism 600 is located at the lower end of the longitudinal sealing opener / closer mechanism 700, and the longitudinal sealing and sealing mechanism 800 is located at the upper end of the longitudinal sealing forming mechanism 200. The remaining mechanisms are connected as a whole through the longitudinal sealing support mechanism 100. The structure and mutual positional relationship of the above mechanisms are as follows.

[0087] like Figure 7 As shown, the longitudinal sealing support mechanism 100 includes a longitudinal sealing back plate 102. A pair of left guide blocks are fixed on the front and rear sides of the left end of the longitudinal sealing back plate 102. Two linear bearings A are provided through the longitudinal sealing back plate 102 and the left guide blocks. A pair of right guide blocks are fixed on the front and rear sides of the right end of the longitudinal sealing back plate 102. Three linear bearings B are provided through the longitudinal sealing back plate 102 and the right guide blocks. The bottom of the left and right guide blocks is flush with the bottom surface of the longitudinal sealing back plate 102. A longitudinal sealing support seat 101 is fixed on the bottom surface of each end of the longitudinal sealing back plate 102. The entire device can be fixedly connected to the packaging machine through the two longitudinal sealing support seats 101.

[0088] like Figure 9 , Figure 12 and Figure 32 As shown, the longitudinal sealing forming mechanism 200 includes an intermediate connecting fixing plate 201 fixed to the front of the longitudinal sealing back plate 102. A packaging film inlet plate 202 is fixed on the upper part of the intermediate connecting fixing plate 201. The packaging film inlet plate 202 has N forward-facing grooves 209. The upper front part of the packaging film inlet plate 202 is designed as an inclined surface intersecting with the grooves 209. The upper part of the grooves 209 is the packaging film inlet. N forming devices are provided in front of the intermediate connecting fixing plate 201. The forming device includes a front forming device block 207 and a rear forming device block 208. Both the front block 207 and the rear block 208 of the forming device have longitudinal semi-circular grooves on their opposing longitudinal surfaces. The front block 207 and the rear block 208 are assembled in pairs according to these longitudinal semi-circular grooves to form a longitudinally continuous cylindrical channel. After the cylindrical channels of the N forming devices are aligned with the N grooves 209 on the packaging film inlet plate 202, a feeding tube 204 is inserted into each groove. The outer diameter of the feeding tube 204 is smaller than the inner diameter of the cylindrical channel it is in, thus forming an annular gap between the feeding tube 204 and the cylindrical channel for the packaging film to pass through. Figure 9 and Figure 10 As shown, the bottom of the semi-circular groove of the front block 207 of the forming device is provided with a narrow groove A210, which is used for the back sealing edge of the packaging film to protrude from the narrow groove A, and the two back sealing edges are aligned and joined together.

[0089] like Figure 9 and Figure 11 As shown, a film receiving plate 205 is provided on the packaging film inlet plate 202 in front of the bottom of the groove. Film receiving brackets 203 are installed at both ends of the film receiving plate 205. The film receiving brackets 203 are fixedly connected to the front of the longitudinal sealing back plate 102. N film receiving pieces 206 are provided on the film receiving plate 205, which correspond one-to-one with the positions of the N grooves 209. A narrow groove B211 is provided behind the film receiving piece 206. The opening direction of the narrow groove B is consistent with the tangential normal of the feed tube 204.

[0090] like Figures 1 to 5 , Figure 7 and Figure 8 As shown, the longitudinal sealing mechanism 300 includes two longitudinal sealing guide shafts A3051 mounted on two linear bearings A in the longitudinal sealing support mechanism 100 and three longitudinal sealing guide shafts B3052 mounted on three linear bearings B in the longitudinal sealing support mechanism 100. A longitudinal left connecting plate 302 is fixed to the shaft head at the rear end of the two longitudinal sealing guide shafts A3051, and a rotating arm fixing block 306 is fixed to the shaft head at the front end of the three longitudinal sealing guide shafts B3052. A longitudinal sealing edge rotating shaft 307 is mounted on the rotating arm fixing block 306. A longitudinal right connecting plate 303 is fixed to the shaft head at the rear end of the three longitudinal sealing guide shafts B3052. A longitudinal connecting beam 304 connects the longitudinal left connecting plate 302 and the longitudinal right connecting plate 303. A longitudinal cylinder 301 is provided in front of the left end of the longitudinal sealing back plate 102. The cylinder rod of the longitudinal cylinder 301 passes through the longitudinal sealing back plate 102 and connects to the longitudinal connecting beam 304.

[0091] like Figures 17 to 22 As shown, the longitudinal sealing preheating mechanism 600 includes a longitudinal sealing main board 602 and N sets of preheating modules 608; a rotating arm connecting block 601 is fixed to the right end of the longitudinal sealing main board 602.

[0092] like Figure 17 As shown, a longitudinal sealing slide block A6061 is installed on each of the left and right sides of the longitudinal sealing main board 602. A longitudinal sealing cylinder A6031 is installed on the right end of the longitudinal sealing main board 602. A longitudinal sealing guide shaft A6051, which can slide axially left and right, is installed between the two longitudinal sealing slide blocks A6061 through a linear bearing. The cylinder rod of the longitudinal sealing cylinder A6031 is connected to the right end of the longitudinal sealing guide shaft A6051. Figure 19As shown, a longitudinal sealing slide block B6062 is installed on each of the left and right sides below the longitudinal sealing main board 602. A longitudinal sealing cylinder B6032 is installed on the left end below the longitudinal sealing main board 602. A longitudinal sealing guide shaft B6052 that can slide left and right is installed between the two longitudinal sealing slide blocks B6062 through a linear bearing. The cylinder rod of the longitudinal sealing cylinder B6032 is connected to the left end of the longitudinal sealing guide shaft B6052.

[0093] The rear of the longitudinal sealing mainboard 602 is provided with N preheating module positioning holes; such as Figure 21 and Figure 22 As shown, the preheating module 608 includes heating block A6081, heating block B6082, and longitudinal sealing rotating shaft 6084. The heads of heating blocks A6081 and B6082 are fitted with longitudinal sealing heating rods 6083. The waists of heating blocks A6081 and B6082 are provided with through holes. The tail of heating block A6081 is provided with an upper fork 60871, and the tail of heating block B6082 is provided with a lower fork 60872. The upper fork 60871 and the lower fork 60872 are provided with U-shaped fork openings facing forward. The vertical distance between the upper and lower forks is greater than the thickness of the longitudinal sealing main board 602.

[0094] like Figures 17 to 20 As shown, the upper fork 60871 is located above the longitudinal sealing main board 602, and the lower fork 60872 is located below the longitudinal sealing main board 602. The through holes on the waist of the heating block A6081 and heating block B6082 are aligned with the preheating module positioning hole of the longitudinal sealing main board 602, and the longitudinal sealing rotating shaft 6084 passes through it. Figure 21 and Figure 22 As shown, the upper and lower ends of the longitudinal sealing rotating shaft 6084 are respectively equipped with a longitudinal rotating shaft sleeve 6805 and a longitudinal sealing baffle 6086.

[0095] The heating blocks A6081 and B6082 are arranged in a scissor-like manner, with their heating surfaces facing each other and an equidistant gap between them. The narrow groove A210 of the front block 207 of the longitudinal forming device protrudes and the back sealing edge, which is placed in the gap between the two heating surfaces, is placed in the gap between the two heating surfaces.

[0096] An upper fork execution-positioning structure is provided between the longitudinal sealing guide shaft A6051 and the upper part of the longitudinal sealing main board 602, and a lower fork execution-positioning structure is provided between the longitudinal sealing guide shaft B6052 and the lower part of the longitudinal sealing main board 602. Under the drive of the longitudinal sealing cylinder A6031 and the longitudinal sealing cylinder B6032, the heating block A6081 and the heating block B6082 are opened or closed.

[0097] like Figure 17 and Figure 18 As shown, on the upper part of the longitudinal sealing main board 602: the longitudinal sealing guide shaft A6051 passes through the U-shaped fork openings of all the upper forks 60871 of the N groups of preheating modules 608. The upper fork execution-positioning structure includes a longitudinal sealing left retaining ring 6091 and a longitudinal sealing right retaining ring 6092, which are respectively fixed on the longitudinal sealing guide shaft A6051 and located on the left and right sides of the upper fork 60871. A longitudinal sealing compression spring 610 is provided between the upper fork 60871 and the longitudinal sealing left retaining ring 6091. The upper fork 60871 and the longitudinal sealing right retaining ring 6092 are kept in contact. An L-shaped longitudinal sealing positioning plate 607 is installed on the upper part of the longitudinal sealing main board 602 on the right side of the upper fork 60871.

[0098] like Figure 19 and Figure 20 As shown, below the longitudinal sealing main board 602: the longitudinal sealing guide shaft B6052 passes through the U-shaped fork openings of all the lower forks 60872 of the N groups of preheating modules 608. The lower fork execution-positioning structure includes a longitudinal sealing left retaining ring 6091 and a longitudinal sealing right retaining ring 6092, which are respectively fixed on the longitudinal sealing guide shaft B6052 and located on the left and right sides of the lower fork 60872. A longitudinal sealing compression spring 610 is provided between the lower fork 60872 and the longitudinal sealing right retaining ring 6092. The lower fork 60872 and the longitudinal sealing left retaining ring 6091 are kept in contact. An L-shaped longitudinal sealing positioning plate 607 is installed below the longitudinal sealing main board 602 and on the left side of the lower fork 60872.

[0099] The vertical plate of the L-shaped longitudinal sealing positioning block 607 is provided with screw holes, in which positioning bolts can be installed.

[0100] like Figure 11 and Figure 12 As shown, the axial position of the left retaining ring 6091 of the longitudinal sealing is adjustable relative to the longitudinal sealing guide shaft A6051. By adjusting the position of the left retaining ring 6091 of the longitudinal sealing, the longitudinal sealing spring 610 is in a compressed state.

[0101] The distance between the equidistant gaps between the two heating surfaces is determined during equipment debugging when processing each batch of products. It is generally 1-3 millimeters more than the film thickness. If the distance is too close, the film's movement inside will be obstructed, and the heating block may damage the film. If the distance is too far, the film will not be heated enough, and it will not be able to be sealed in the next sealing process. The width of the equidistant gaps between the two heating surfaces is controlled by the positions of the left and right longitudinal sealing retaining rings in the upper and lower fork actuator-positioning structure.

[0102] The rotating arm connecting block 601 is hinged to the longitudinal sealing edge rotating shaft 307, specifically, as shown in the figure. Figure 7As shown, the rotating arm connecting block 601 is fitted onto the longitudinal sealing edge rotating shaft 307, and a self-lubricating bushing 308 is provided between the longitudinal sealing edge rotating shaft 307 and the rotating arm connecting block 601.

[0103] like Figures 23 to 31 As shown, the longitudinal sealing and opening / closing mechanism 700 includes a longitudinal sealing and opening / closing main block 701, a longitudinal sealing and opening / closing sub-block 702, and a longitudinal sealing and opening / closing fork 704; as Figure 26 As shown, the lower middle part of the main block 701 of the longitudinal sealing opener is provided with a through-slot 708 that runs from left to right, and the middle right side of the main block 701 of the longitudinal sealing opener is provided with a through-slot 709 that runs from front to back; Figure 30 As shown, the longitudinal sealing opener fork 704 is provided in the fork groove 708 through a shaft hole connection structure. A blind hole A710 is provided on the top surface of the left side of the longitudinal sealing opener fork 704. A blind hole B711 is provided on the bottom surface of the through groove 709, which is vertically aligned with the blind hole A710. An opener compression spring 707 is embedded between the blind hole A710 and the blind hole B711. Under the action of the opener compression spring 707, the right end of the longitudinal sealing opener fork 704 remains in a raised position. Figure 23 , Figure 27 and Figure 28 As shown, a wedge-shaped block 712 is provided on the left side of the longitudinal sealing opener sub-block 702. The bottom of the wedge-shaped block 712 has a groove 713, and the height of the wedge-shaped block 712 is consistent with the height of the through groove 709 on the right side of the longitudinal sealing opener main block 701; as Figure 23 and Figure 29 As shown, a longitudinal sealing opener locking block 703 is installed on the front of the longitudinal sealing opener sub-block 702. A protruding baffle 714 is provided on the rear side of the longitudinal sealing opener locking block 703. A screw is fixed on the rear side of the protruding baffle 714. A rubber stop 705 is provided on the screw. The rubber stop 705 is in close contact with the front of the longitudinal sealing opener main block 701. The front of the longitudinal sealing opener main block 701 is flush with the front of the longitudinal sealing opener sub-block 702.

[0104] like Figure 7 , Figure 8 , Figure 23 and Figure 24 As shown, the main block 701 of the longitudinal sealing opener has two shaft holes along the front-rear direction, which are respectively aligned with the positions of the two longitudinal sealing guide shafts A3051 in the remote longitudinal sealing mechanism 300. The main block 701 of the longitudinal sealing opener is connected to the shaft head at the front end of the longitudinal sealing guide shaft A3051 by the shaft hole; Figure 8 , Figure 11 , Figure 23 and Figure 24As shown, the longitudinal sealing opener / closer sub-block 702 is fixedly connected to the left end of the longitudinal sealing main board 602. Specifically, the left end of the longitudinal sealing main board 602 is provided with two connecting holes for connecting the longitudinal sealing opener / closer mechanism 700. The longitudinal sealing opener / closer sub-block 702 is provided with through holes that are aligned with the positions of the two connecting holes on the left end of the longitudinal sealing main board 602. The longitudinal sealing opener / closer sub-block 702 and the longitudinal sealing main board 602 are fixed together by bolts.

[0105] like Figure 32 As shown, the longitudinal sealing mechanism 800 includes roller connecting blocks 801 fixed at both ends of the longitudinal sealing back plate 102, and a longitudinal sealing bar 804 connected between the roller connecting blocks 801 at both ends. The longitudinal sealing bar 804 is located at the lower end of the forming device of the longitudinal sealing forming mechanism 200. A roller adjusting block 802 is provided between the longitudinal sealing bar 804 and the roller connecting blocks 801. Figure 32 , Figure 34 and Figure 35 As shown, N pressure roller groups are installed on the longitudinal sealing bar 804.

[0106] like Figures 34 to 40 As shown, the pressure roller assembly includes a film pressing block 805 and parallel longitudinal sealing film pressing shafts A8031 and B8032. The longitudinal sealing film pressing shaft A8031 passes through a circular bearing hole 813 on the longitudinal sealing bar 804, extending from the front to the rear of the bar. The longitudinal sealing film pressing shaft B8032 passes through an elongated hole A814 on the longitudinal sealing bar 804, extending from the front to the rear of the bar. The longitudinal sealing bar 804 has a section perpendicular to the elongated hole A814. The longitudinal sealing bar 804 has intersecting and penetrating elongated holes B812. A pin hole 815 is provided in front of the longitudinal sealing bar 804 and below the longitudinal sealing pressure shaft B8032. The upper part of the pressure block 805 is provided with a shaft hole that is clearance-fitted with the longitudinal sealing pressure shaft B8032. The lower part of the pressure block 805 is provided with a through hole. The pressure block 805 is assembled on the longitudinal sealing pressure shaft B8032 through the upper through hole, which drives the bearings 810 fixed at the front and rear ends of the longitudinal sealing pressure shaft B8032 to be linked in series.

[0107] Meanwhile, a pressure film rotating shaft 809 is installed in the through hole and pin hole 815 at the lower part of the pressure film block 805, thereby hinged the pressure film block 805 in the elongated hole B812 through the pressure film rotating shaft 809; the front and rear ends of the longitudinal sealing pressure film shaft A8031 and longitudinal sealing pressure film shaft B8032 are each provided with a bearing group composed of two bearings 810 (the front and rear bearing groups are closely attached to each other to form a pressure roller structure), and a pressure film shaft retainer 811 is provided at the outer end of the rear bearing group 810 to make the positions of the two bearing groups parallel. The bottom of the longitudinal sealing bar 804 is provided with a pressure film positioning block 806, and an adjusting bolt 807 is provided between the pressure film positioning block 806 and the lower part of the pressure film block 805. A pressure film spring 808 is provided on the adjusting bolt 807, such as Figure 39 and Figure 40 As shown, in the pressure roller assembly, the screw diameter of the adjusting bolt 807 is the same as the inner diameter of the pressure spring 808. The tail end of the adjusting bolt 807 is provided with a shoulder 8071. One end of the pressure spring 808 abuts against the shoulder 8071, and the other end of the pressure spring 808 abuts against the side of the pressure block 805. Rotating the adjusting bolt 807 causes the two sets of bearings 810 of the longitudinal sealing pressure shaft A8031 and the longitudinal sealing pressure shaft B8032 to be tightly pressed together.

[0108] In the longitudinal sealing mechanism 800, a set of bearings 810 located on the rear side of the longitudinal sealing bar 804 is positioned in front of the feed pipe 204 extending from the bottom of the longitudinally penetrating cylindrical channel formed by the joining and assembly of the front block 207 and the rear block 208 of the molding machine. Figure 32 and Figure 33 As shown, the tangent of the N sets of bearings 810 at the rear end of the N sets of pressure rollers is aligned with the symmetrical line of the narrow groove A210 in front of the front block 207 of the N forming machines; that is, the set of bearings 810 at the rear end is arranged symmetrically to the left and right of the position of the narrow groove A210 in front of the front block 207 of the forming machine, so that the longitudinal sealing edge of the packaging bag after wrapping the feeding tube 204 is sandwiched between the two bearings 810 in this set.

[0109] like Figure 2 As shown, the longitudinal sealing guide mechanism 400 includes brackets 450 respectively fixed to the front ends of two roller connecting blocks 801, and a longitudinal sealing guide connecting plate 401 connected between the two brackets 450. The longitudinal sealing guide connecting plate 401 is located below the longitudinal sealing mechanism 800, as shown. Figure 13 As shown, N guide rings 402 are fixed on the longitudinal sealing guide connecting plate 401. The guide rings 402 are arc-shaped, and the N guide rings 402 respectively wrap around N feed pipes 204, as shown. Figure 6 As shown, press down the already sealed back seal edge to make it adhere to the tubular packaging film.

[0110] like Figures 14 to 16 As shown, the guide roller mechanism 500 includes a pressure roller beam 505 fixed between two supports 450. The pressure roller beam 505 is located below the longitudinal sealing guide mechanism 400. N sets of longitudinal sealing pressure rollers are provided on the pressure roller beam 505. Each longitudinal sealing pressure roller set includes two linear bearings 503 passing through the pressure roller beam 505. A longitudinal sealing pressure roller guide shaft 507 is provided in the linear bearing 503. The front ends of the two longitudinal sealing pressure roller guide shafts 507 are fixedly connected. There is a pressure roller tensioning block 506, and the rear ends of two longitudinal sealing pressure roller guide shafts 507 are inherently connected to longitudinal sealing pressure roller seats 502. A longitudinal sealing pressure roller 501 is provided inside the longitudinal sealing pressure roller seat 502. A pressure roller spring 504 is fitted on the longitudinal sealing pressure roller guide shaft 507, located between the connected longitudinal sealing pressure roller seat 502 and the pressure roller crossbeam 505. The outer rotating surface of the longitudinal sealing pressure roller 501 is a concave arc surface, which matches the outer rotating surface of the feed pipe 204. Figure 2 , Figure 3 and Figure 6 As shown, in the N groups of longitudinal sealing rollers, the outer rotating surface of the longitudinal sealing roller 501 is coaxial with the outer rotating surfaces of the N feed pipes 204.

[0111] The process of sealing packaging bags using the device provided by this utility model is as follows: Figure 1 , Figure 9 , Figure 21 and Figure 22 As shown, the packaging film, divided into long strips, descends along the inclined surface of the packaging film inlet plate 202 and enters the forward-facing groove 209 and the feed pipe 204, forming a wrapped profile cylindrical shape. Two aligned and joined sealing edges extend from the narrow groove A210 at the front end of the forming block 207, passing through the equidistant gap between the heating surfaces of heating blocks A6081 and B6082 in the longitudinal sealing preheating mechanism 600 for preheating. Under the pull of an external mechanism, it continues to descend, and the heated back sealing edge enters the pressure roller group at the rear of the longitudinal sealing mechanism 800 for sealing. Figure 32 and Figure 33 As shown. The packaging film continues to descend, entering the longitudinal sealing guide mechanism 400, as... Figure 6 and Figure 13 As shown, under the guidance of the guide ring 402, the back seal edge of the packaging bag is tilted towards the cylindrical surface of the packaging bag. The packaging film continues to descend, and the packaging bag enters the guide film roller mechanism 500. The back seal edge is pressed and adhered to the cylindrical surface of the packaging bag under the pressure of the longitudinal sealing roller 501.

[0112] like Figures 17 to 20As shown, in the longitudinal sealing preheating mechanism 600, the cylinder rod of the longitudinal sealing cylinder A6031 on the longitudinal sealing main board 602 extends, and the left and right longitudinal sealing retaining rings 6091 and 6092 move to the left under the linkage of the longitudinal sealing guide shaft A6051. The right longitudinal sealing retaining ring 6092 pushes the upper fork 60871 at the tail of the heating block A6801 to rotate to the left. Similarly, the cylinder rod of the longitudinal sealing cylinder B6032 below the longitudinal sealing main board 602 extends, and the left and right longitudinal sealing retaining rings 6091 and 6092 move to the right under the linkage of the longitudinal sealing guide shaft B605. The left longitudinal sealing retaining ring 6091 pushes the lower fork 60872 at the tail of the heating block B6802 to rotate to the right. That is, both the upper and lower forks 60871 and 60872 move closer to the center, as... Figure 21 and Figure 22 As shown, the two heating blocks 6081 and 6082 are separated, allowing for maintenance, film insertion, and debugging. The installation positions of the upper longitudinal sealing right retaining ring 6092 and the lower longitudinal sealing left retaining ring 6092 can be adjusted separately. In addition, the positioning bolts on the longitudinal sealing positioning block 607 can also adjust the gap between the heads of the two longitudinal sealing heating blocks to accommodate different film thickness requirements.

[0113] like Figure 36 , Figure 37 , Figure 39 and Figure 40 As shown, in the longitudinal sealing mechanism 800, the sealing pressure is adjusted by changing the screw-in amount of the adjusting bolt 807 on the pressure film positioning block 806 and altering the length of the pressure film spring 808. Additionally, by changing the rear bearing 810 to a textured roller, texture can be added to the longitudinal sealing edge.

[0114] Figure 31 The diagram illustrates the positions and states of each component in the longitudinal sealing and closing mechanism 700 during operation. The closing and opening spring 707 is in a relatively relaxed state, the longitudinal sealing and opening fork 704 is in a horizontal position, the front of the longitudinal sealing and opening main block 701 is flush with the front of the longitudinal sealing and opening sub-block 702, the rubber end face behind the rubber bolt stop 705 is in contact with the front of the longitudinal sealing and opening main block 701, and the right side of the longitudinal sealing and opening fork 704 is inserted into the bottom groove of the longitudinal sealing and opening sub-block 702. The entire longitudinal sealing and opening mechanism 700 remains balanced. When the left side of the longitudinal sealing and opening fork 704 is lifted, the closing and opening spring 707 is compressed, the right end of the longitudinal sealing and opening fork 704 disengages from the bottom groove of the longitudinal sealing and opening sub-block 702, pulling the longitudinal sealing and opening sub-block 702 outwards, and the longitudinal sealing and opening mechanism 700 performs an opening action. Figure 1 As shown, the entire longitudinal sealing preheating mechanism 600 rotates along the longitudinal sealing edge rotating shaft 307. At this time, the longitudinal sealing preheating mechanism 600 can be debugged and maintained.

[0115] like Figure 1 and Figure 7As shown, when the cylinder rod of the distal longitudinal cylinder 301 of the longitudinal sealing support mechanism 100 extends, the distal longitudinal connecting beam 304 moves backward, and the entire longitudinal sealing preheating mechanism 600 enters the working position under the linkage of the longitudinal sealing opener main block 701 and the rotating arm fixing block 306. The longitudinal sealing edge enters the rear end gap of the preheating module 608 of the longitudinal sealing preheating mechanism 600 for preheating. When the cylinder rod of the distal longitudinal cylinder 301 of the longitudinal sealing support mechanism 100 retracts, the distal longitudinal connecting beam 304 moves forward, and the entire longitudinal sealing preheating mechanism 600 exits the working position under the linkage of the longitudinal sealing opener main block 701 and the rotating arm fixing block 306. The longitudinal sealing edge exits the rear end gap of the preheating module 608 of the longitudinal sealing preheating mechanism 600. At this time, the preheating work of the longitudinal sealing edge can be stopped for maintenance and adjustment.

[0116] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "bottom", "top", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0117] Although the above description of the present invention, a preheating and sealing device for a multi-row packaging machine, in conjunction with the accompanying drawings, is schematic, the present invention is not limited to the specific embodiments described above. The drawings are only one embodiment of the present invention and are not limited to the specific implementation methods described above. They are not restrictive. Those skilled in the art can make many modifications under the guidance of the present invention without departing from its spirit. Any obvious modifications should be protected by the present invention.

Claims

1. A pre-heating sealing device for a multi-column packaging machine, characterized in that: It includes a longitudinal sealing support mechanism (100), a longitudinal sealing forming mechanism (200), a longitudinal sealing mechanism (300), a longitudinal sealing edge guiding mechanism (400), a guide roller mechanism (500), a longitudinal sealing preheating mechanism (600), a longitudinal sealing opener / closer mechanism (700), and a longitudinal sealing closing mechanism (800); The longitudinal sealing support mechanism (100) includes a longitudinal sealing back plate (102). A pair of left guide blocks are fixed on the front and rear sides of the left end of the longitudinal sealing back plate (102). Two linear bearings A are provided through the longitudinal sealing back plate (102) and the left guide blocks. A pair of right guide blocks are fixed on the front and rear sides of the right end of the longitudinal sealing back plate (102). Three linear bearings B are provided through the longitudinal sealing back plate (102) and the right guide blocks. The bottom of the left and right guide blocks is flush with the bottom surface of the longitudinal sealing back plate (102). A longitudinal sealing support seat (101) is fixed on the bottom surface of each end of the longitudinal sealing back plate (102). The longitudinal sealing forming mechanism (200) includes an intermediate connecting fixing plate (201) fixed in front of the longitudinal sealing back plate (102). A packaging film inlet plate (202) is fixed on the upper part of the intermediate connecting fixing plate (201). The packaging film inlet plate (202) has N grooves (209) with openings facing forward. The upper front part of the packaging film inlet plate (202) is designed as an inclined surface intersecting with the grooves (209). The upper part of the grooves (209) is the packaging film inlet. (201) has N forming devices in front of it. Each forming device includes a front forming device (207) and a rear forming device (208). The front forming device (207) and the rear forming device (208) each have a longitudinal semi-circular groove on their opposite longitudinal surfaces. The front forming device (207) and the rear forming device (208) are assembled in pairs according to the longitudinal semi-circular grooves to form a longitudinally penetrating cylindrical channel. The cylindrical channel of the N forming devices and the N grooves (207, 208, 208) on the packaging film inlet plate (202) are connected. After the positions of 9) are aligned, a feeding tube (204) is inserted therein. The outer diameter of the feeding tube (204) is smaller than the inner diameter of the cylindrical channel, thus forming an annular gap between the feeding tube (204) and the cylindrical channel for the packaging film to pass through. The bottom of the semi-circular groove of the forming device front block (207) is provided with a narrow groove A (210) for the back sealing edge of the packaging film to protrude from the narrow groove A, and the two back sealing edges are aligned and joined together. On the packaging film inlet plate (202), at the bottom of the groove A film-receiving frame plate (205) is provided at the front of the part. A film-receiving bracket (203) is installed at both ends of the film-receiving frame plate (205). The film-receiving bracket (203) is fixedly connected to the front of the longitudinal sealing back plate (102). N film-receiving pieces (206) are provided on the film-receiving frame plate (205) and the positions of the N grooves (209) are one-to-one. A narrow groove B (211) is provided behind the film-receiving pieces (206). The opening direction of the narrow groove B is consistent with the tangential normal of the feed tube (204). The longitudinal sealing mechanism (300) includes two longitudinal sealing guide shafts A (3051) mounted on two linear bearings A in the longitudinal sealing support mechanism (100) and three longitudinal sealing guide shafts B (3052) mounted on three linear bearings B in the longitudinal sealing support mechanism (100). A longitudinal left connecting plate (302) is fixed to the shaft head at the rear end of the two longitudinal sealing guide shafts A (3051), and a rotating arm fixing block (306) is fixed to the shaft head at the front end of the three longitudinal sealing guide shafts B (3052). A longitudinal sealing side rotating shaft (307) is mounted on the rotating arm fixing block (306). A longitudinal right connecting plate (303) is fixed to the shaft head at the rear end of the three longitudinal sealing guide shafts B (3052), and a longitudinal connecting beam (304) connects the longitudinal left connecting plate (302) and the longitudinal right connecting plate (303). A remote longitudinal cylinder (301) is provided at the front of the left end of the longitudinal sealing back plate (102). The cylinder rod of the remote longitudinal cylinder (301) passes through the longitudinal sealing back plate (102) and is connected to the remote longitudinal connecting beam (304). The longitudinal sealing preheating mechanism (600) includes a longitudinal sealing main board (602) and N sets of preheating modules (608); a rotating arm connecting block (601) is fixed to the right end of the longitudinal sealing main board (602); a longitudinal sealing slide A (6061) is installed on each of the left and right sides of the longitudinal sealing main board (602); a longitudinal sealing cylinder A (6031) is installed on the right end of the longitudinal sealing main board (602); a longitudinal sealing guide shaft A (6051) that can slide axially left and right is installed between the two longitudinal sealing slides A (6061) through a linear bearing; the cylinder of the longitudinal sealing cylinder A (6031) is... The rod is connected to the right end of the longitudinal sealing guide shaft A (6051); a longitudinal sealing slide block B (6062) is installed on each of the left and right sides below the longitudinal sealing main board (602); a longitudinal sealing cylinder B (6032) is installed on the left end below the longitudinal sealing main board (602); a longitudinal sealing guide shaft B (6052) that can slide left and right is installed between the two longitudinal sealing slide blocks B (6062) through a linear bearing; the cylinder rod of the longitudinal sealing cylinder B (6032) is connected to the left end of the longitudinal sealing guide shaft B (6052); N preheating module positioning holes are provided at the rear of the longitudinal sealing main board (602); The preheating module (608) includes heating block A (6081), heating block B (6082), and a longitudinal sealing rotating shaft (6084). The heads of heating block A (6081) and heating block B (6082) are fitted with longitudinal sealing heating rods (6083). Both heating block A (6081) and heating block B (6082) have through holes in their waists. Heating block A (6081) has an upper fork (60871) at its tail. Heating block B (6082)... The tail end is provided with a lower fork (60872), and the upper fork (60871) and the lower fork (60872) are provided with U-shaped fork openings facing forward. The vertical distance between the upper and lower forks is greater than the thickness of the longitudinal sealing main board (602). The upper fork (60871) is located above the longitudinal sealing main board (602), and the lower fork (60872) is located below the longitudinal sealing main board (602), so that the heating block A (6081) and the heating block B (60872) are positioned... 2) The through hole in the waist is aligned with the positioning hole of the preheating module of the longitudinal sealing main board (602), and the longitudinal sealing rotating shaft (6084) passes through it; the heating block A (6081) and the heating block B (6082) are arranged in a scissor-like manner, the heating surfaces of the heating block A (6081) and the heating block B (6082) are arranged facing each other, and there is an equidistant gap between the two heating surfaces; the narrow groove A (210) in front of the longitudinal forming front block (207) protrudes and the back is closed together. The sealing edge is placed in the gap between the two heating surfaces; an upper fork execution-positioning structure is provided between the longitudinal sealing guide shaft A (6051) and the upper part of the longitudinal sealing main board (602), and a lower fork execution-positioning structure is provided between the longitudinal sealing guide shaft B (6052) and the lower part of the longitudinal sealing main board (602). Under the drive of the longitudinal sealing cylinder A (6031) and the longitudinal sealing cylinder B (6032), the heating block A (6081) and the heating block B (6082) are opened or closed. The rotating arm connecting block (601) is hinged to the longitudinal sealing edge rotating shaft (307); The longitudinal sealing and closing mechanism (700) includes a longitudinal sealing and closing main block (701), a longitudinal sealing and closing sub-block (702), and a longitudinal sealing and closing fork (704); the lower middle part of the longitudinal sealing and closing main block (701) is provided with a fork groove (708) that runs through the left and right sides, and the middle right side of the longitudinal sealing and closing main block (701) is provided with a through groove (709) that runs through the front and back; the longitudinal sealing and closing fork (704) is connected through a shaft hole. The structure is provided within the fork groove (708). A blind hole A (710) is provided on the top surface of the left side of the longitudinal sealing opener fork (704). A blind hole B (711) is provided on the bottom surface of the through groove (709) and is vertically aligned with the blind hole A (710). An opener compression spring (707) is embedded between the blind hole A (710) and the blind hole B (711). Under the action of the opener compression spring (707), The right end of the longitudinal sealing opener fork (704) remains in the raised position; a wedge block (712) is provided on the left side of the longitudinal sealing opener sub-block (702), the bottom of the wedge block (712) has a groove (713), and the height of the wedge block (712) is consistent with the height of the through groove (709) on the right side of the longitudinal sealing opener main block (701); a longitudinal sealing opener is installed in front of the longitudinal sealing opener sub-block (702). The locking block (703) of the longitudinal sealing opener is provided with a protruding baffle (714) on its rear side. A screw is fixed on the rear side of the protruding baffle (714). A rubber stop (705) is provided on the screw. The rubber stop (705) is in close contact with the front of the main block (701) of the longitudinal sealing opener. The front of the main block (701) of the longitudinal sealing opener is flush with the front of the auxiliary block (702) of the longitudinal sealing opener. The main block (701) of the longitudinal sealing opener is connected to the shaft head at the front end of the longitudinal sealing guide shaft A (3051) by a shaft hole; the auxiliary block (702) of the longitudinal sealing opener is fixedly connected to the left end of the longitudinal sealing main board (602); The longitudinal sealing mechanism (800) includes roller connecting blocks (801) fixed at both ends of the longitudinal sealing back plate (102), and a longitudinal sealing bar (804) is connected between the roller connecting blocks (801) at both ends. The longitudinal sealing bar (804) is located at the lower end of the forming device of the longitudinal sealing forming mechanism (200). A roller adjusting block (802) is provided between the longitudinal sealing bar (804) and the roller connecting block (801). N pressure roller groups are installed on the longitudinal sealing bar (804). The pressure roller assembly includes a pressure block (805) and parallel longitudinal sealing pressure shafts A (8031) and B (8032). The longitudinal sealing pressure shaft A (8031) passes through a circular bearing hole (813) on the longitudinal sealing bar (804) and extends through it. The longitudinal sealing pressure shaft B (8032) passes through an elongated hole A (814) on the longitudinal sealing bar (804) and extends through it. The longitudinal sealing bar (804) is provided with an elongated hole B (812) that intersects the elongated hole A (814) perpendicularly and passes through the top and bottom of the longitudinal sealing bar (804). A pin hole (815) is provided in front of the longitudinal sealing bar (804) and below the longitudinal sealing pressure shaft B (8032). The upper part of the pressure block (805) is provided with a shaft hole that fits with the longitudinal sealing pressure shaft B (8032) with clearance. The lower part of the pressure block (805) is provided with a through hole. The pressure block (805) passes through the through hole in the upper part. The longitudinal sealing and pressing shaft B (8032) is assembled on the longitudinal sealing and pressing shaft. At the same time, a pressing rotating shaft (809) is installed in the through hole and pin hole (815) at the lower part of the pressing block (805), so that the pressing block (805) is hinged in the elongated hole B (812) through the pressing rotating shaft (809). The longitudinal sealing and pressing shaft A (8031) and the longitudinal sealing and pressing shaft B (8032) are each provided with a bearing group consisting of two bearings (810) at their front and rear ends. At the rear end of the bearing group (810), there are bearings on the outer ends of the bearing group (810). A pressure film shaft retainer (811) is provided to make the two sets of bearings aligned front and back; a pressure film positioning block (806) is provided at the bottom of the longitudinal sealing bar (804), and an adjusting bolt (807) is provided between the lower part of the pressure film positioning block (806) and the pressure film block (805), and a pressure film spring (808) is provided on the adjusting bolt (807); rotating the adjusting bolt (807) makes the two sets of bearings (810) of the longitudinal sealing pressure film shaft A (8031) and the longitudinal sealing pressure film shaft B (8032) fit together tightly; The tangent of the Nth bearing (810) at the rear end of the Nth roller group is aligned with the symmetrical line of the narrow groove A (210) in front of the front block (207) of the Nth forming device; The longitudinal sealing guide mechanism (400) includes brackets (450) fixed at the front ends of two roller connecting blocks (801) respectively. A longitudinal sealing guide connecting plate (401) is connected between the two brackets (450). The longitudinal sealing guide connecting plate (401) is located below the longitudinal sealing mechanism (800). N guide retaining rings (402) are fixed on the longitudinal sealing guide connecting plate (401). The guide retaining rings (402) are arc-shaped retaining rings. The N guide retaining rings (402) respectively wrap around N feeding tubes (204) to press down the sealed back sealing edge so that it adheres to the tubular packaging film. The guide roller mechanism (500) includes a pressure roller beam (505) fixed between two supports (450). The pressure roller beam (505) is located below the longitudinal sealing guide mechanism (400). N sets of longitudinal sealing pressure rollers are provided on the pressure roller beam (505). Each longitudinal sealing pressure roller set includes two linear bearings (503) passing through the pressure roller beam (505). Longitudinal sealing pressure roller guide shafts (507) are provided in the linear bearings (503). The front ends of the two longitudinal sealing pressure roller guide shafts (507) are fixedly connected to... The pressure roller tensioning block (506) and the rear end of the two longitudinal sealing pressure roller guide shafts (507) are inherently connected to the longitudinal sealing pressure roller seat (502). The longitudinal sealing pressure roller seat (502) is provided with a longitudinal sealing pressure roller (501). A pressure roller spring (504) is fitted on the longitudinal sealing pressure roller guide shaft (507) between the connected longitudinal sealing pressure roller seat (502) and the pressure roller crossbeam (505). The outer rotating surface of the longitudinal sealing pressure roller (501) is a concave arc surface, and the concave arc surface matches the outer rotating surface of the feed tube (204).

2. The preheating and sealing device for a multi-row packaging machine according to claim 1, characterized in that, On the upper part of the longitudinal sealing main board (602), the longitudinal sealing guide shaft A (6051) passes through the U-shaped fork openings of all the upper forks (60871) of the N groups of preheating modules (608). The upper fork execution-positioning structure includes a longitudinal sealing left retaining ring (6091) and a longitudinal sealing right retaining ring (6092) respectively fixed on the longitudinal sealing guide shaft A (6051) and located on the left and right sides of the upper fork (60871). A longitudinal sealing compression spring (610) is provided between the upper fork (60871) and the longitudinal sealing left retaining ring (6091). The upper fork (60871) and the longitudinal sealing right retaining ring (6092) are kept in contact. An L-shaped longitudinal sealing positioning plate (607) is installed on the upper part of the longitudinal sealing main board (602) on the right side of the upper fork (60871). Below the longitudinal sealing main board (602): the longitudinal sealing guide shaft B (6052) passes through the U-shaped fork openings of all the lower forks (60872) of the N groups of preheating modules (608). The lower fork execution-positioning structure includes a longitudinal sealing left retaining ring (6091) and a longitudinal sealing right retaining ring (6092) respectively fixed on the longitudinal sealing guide shaft B (6052) and located on the left and right sides of the lower fork (60872). A longitudinal sealing compression spring (610) is provided between the lower fork (60872) and the longitudinal sealing right retaining ring (6092). The lower fork (60872) and the longitudinal sealing left retaining ring (6091) are kept in contact. An L-shaped longitudinal sealing positioning plate (607) is installed below the longitudinal sealing main board (602) and on the left side of the lower fork (60872).

3. The preheating and sealing device for a multi-row packaging machine according to claim 2, characterized in that, The axial position of the left retaining ring (6091) of the longitudinal sealing is adjustable relative to the longitudinal sealing guide shaft A (6051). By adjusting the position of the left retaining ring (6091), the longitudinal sealing spring (610) is in a compressed state.

4. The preheating and sealing device for a multi-row packaging machine according to claim 1, characterized in that, The longitudinal sealing rotating shaft (6084) is equipped with a longitudinal rotating shaft sleeve (6805) and a longitudinal sealing baffle (6086) at its upper and lower ends, respectively.

5. The preheating and sealing device for a multi-row packaging machine according to claim 1, characterized in that, The rotating arm connecting block (601) is fitted onto the longitudinal sealing shaft (307) in the longitudinal sealing mechanism (300), and a self-lubricating bushing (308) is provided between the longitudinal sealing shaft (307) and the rotating arm connecting block (601).

6. The preheating and sealing device for a multi-row packaging machine according to claim 1, characterized in that, The main block (701) of the longitudinal sealing opener is provided with two shaft holes along the front-to-back direction, which are respectively aligned with the positions of the two longitudinal sealing guide shafts A (3051) in the remote longitudinal sealing mechanism (300); the left end of the longitudinal sealing main board (602) is provided with two connecting holes for connecting the longitudinal sealing opener mechanism (700); the secondary block (702) of the longitudinal sealing opener is provided with through holes aligned with the positions of the two connecting holes at the left end of the longitudinal sealing main board (602); the secondary block (702) of the longitudinal sealing opener and the longitudinal sealing main board (602) are fixed together by bolts.

7. The preheating and sealing device for a multi-row packaging machine according to claim 1, characterized in that, In the pressure roller assembly, the screw diameter of the adjusting bolt (807) is the same as the inner diameter of the pressure spring (808). The tail end of the adjusting bolt (807) is provided with a shoulder (8071). One end of the pressure spring (808) abuts against the shoulder (8071), and the other end of the pressure spring (808) abuts against the side of the pressure block (805).

8. The preheating and sealing device for a multi-row packaging machine according to claim 1, characterized in that, In the longitudinal sealing mechanism, a set of bearings (810) located on the rear side of the longitudinal sealing bar (804) is located in front of the feed tube (204) extending from the bottom of the longitudinally penetrating cylindrical channel formed by the assembly of the front block (207) and the rear block (208) of the molding machine, and is arranged symmetrically to the left and right of the position of the narrow groove A (210) in front of the front block (207) of the molding machine, so that the longitudinal sealing edge after the packaging bag wraps the feed tube (204) is sandwiched between the two bearings (810) of the set.

9. The preheating and sealing device for a multi-row packaging machine according to claim 1, characterized in that, In the N groups of longitudinal sealing rollers, the outer rotating surface of the longitudinal sealing roller (501) is coaxial with the outer rotating surfaces of the N feeding pipes (204).

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