A bag opening and sealing device

Abstract

The utility model discloses a kind of packaging bag opening and sealing device, belong to packaging equipment technical field.It is including horizontal sliding installation on the rack of variable position support, variable position cylinder is used to drive variable position support to move;Upper slide, lower slide are respectively vertically sliding installation on variable position support;Upper bag clamping cylinder, lower bag clamping cylinder are used to drive corresponding upper slide, lower slide to move;Two insert piece assemblies are respectively sliding installation on upper slide, lower slide, insert piece assembly includes the insert piece for inserting the bag mouth of packaging bag, and expansion cylinder for driving insert piece sliding;Upper slide, lower slide are respectively corresponding rotation installation with upper width adjustment screw rod, lower width adjustment screw rod, for corresponding adjusting the interval of two expansion cylinders on upper slide, lower slide.The utility model can be adjusted according to different size of packaging bag, can automatically continuously complete bagging, sealing process, improve packaging efficiency, reduce manpower demand and cost.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, specifically to a packaging bag opening and sealing device. Background Technology

[0002] Disposable chopsticks are widely used disposable items in the catering industry. Their production process includes multiple stages, from raw material processing and shaping to single / double packaging, intermediate packaging, and final bulk packaging. The packaging step from intermediate packaging to bulk packaging is primarily done manually. This involves manually opening the bulk bag and placing the intermediate bags containing disposable chopsticks one by one into the bulk packaging bag, typically requiring two workers. This traditional manual packaging method is inefficient and cannot meet the needs of large-scale production; moreover, labor costs are high, and packaging quality problems are prone to occur. Utility Model Content

[0003] The purpose of this invention is to provide a packaging bag opening and sealing device that can automatically complete the opening, positioning, and sealing operations of the packaging bag.

[0004] This utility model adopts the following technical solution: a packaging bag opening and sealing device, comprising: The displacement bracket is horizontally slidably mounted on the frame. A displacement cylinder is used to drive the displacement bracket to slide on the frame; The upper slide and the lower slide are vertically slidably mounted on the displacement bracket, respectively; The upper bag cylinder is used to drive the upper slide to slide on the displacement bracket; The lower bag cylinder is used to drive the lower slide frame to slide on the displacement bracket; Two insert assemblies are slidably mounted on the upper slide and the lower slide, respectively, and the sliding direction of the insert assembly is perpendicular to that of the displacement bracket; the insert assembly includes an insert for inserting into the opening of the packaging bag, and an expansion cylinder for driving the insert to slide. The upper slide and the lower slide are respectively rotatably mounted with an upper width adjusting screw and a lower width adjusting screw; The upper width adjusting screw is threadedly connected to two expansion cylinders on the upper slide, and is used to adjust the distance between the two expansion cylinders on the upper slide; The lower width adjusting screw is threadedly connected to two expansion cylinders on the lower slide frame, and is used to adjust the distance between the two expansion cylinders on the lower slide frame.

[0005] Furthermore, a pair of displacement slide rails are fixed on the frame; the displacement bracket is installed on the displacement slide rails and has three working positions: front, middle and rear.

[0006] A pair of vertical sliding rods are fixed on the displacement bracket, and the two ends of the upper sliding frame and the lower sliding frame are slidably mounted on the sliding rods on the corresponding sides. An upper limit screw that cooperates with the upper slide is installed on the upper side of the displacement bracket.

[0007] The insert and the expansion cylinder in the insert assembly are respectively slidably mounted on the corresponding upper slide and lower slide; The output end of the expansion cylinder is fixedly connected to the insert plate, and the expansion cylinder is threadedly connected to the corresponding upper width adjusting screw and lower width adjusting screw.

[0008] The insert includes a flat plate and a side plate fixed to the outer side of the flat plate. The four inserts form a guide channel for conveying materials. The insert has a flared guide opening at the end furthest from the bag opening.

[0009] The four inserts are respectively provided with an upper clamping component and a lower clamping component on the upper and lower sides, and the upper clamping component and the lower clamping component are located on the side of the inserts closer to the packaging bag; The lower clamping assembly includes a lower pressing bag cylinder that is vertically fixed on the frame, and the output end of the lower pressing bag cylinder is fixed with a lower pressing strip for pressing the lower side of the two inserts on the lower side; The upper clamping assembly includes an upper pressing cylinder that is vertically slidably mounted on the frame, and the output end of the upper pressing cylinder is fixed with an upper pressing strip for pressing against the upper side of the two upper inserts.

[0010] The lower pressure bar is fixed with a pressure guide post parallel to the lower pressure bag cylinder, and the pressure guide post is slidably connected to the pressure guide sleeve fixed on the frame; The upper pressing cylinder is fixed on the pressing slide plate, which is slidably mounted on the frame via a vertical pressing guide rail. The upper side of the pressing slide plate is rotatably connected to an upper pressing height adjusting screw, which is threadedly connected to a fixed seat on the frame.

[0011] The upper heat sealing assembly and the lower heat sealing assembly are respectively provided above and below the four inserts, and the upper heat sealing assembly and the lower heat sealing assembly are located on the side of the upper clamping assembly and the lower clamping assembly that are close to the packaging bag; The lower heat sealing assembly includes a lower heat sealing cylinder that is vertically slidably mounted on the frame, and a lower heat sealing strip for heat sealing operation is fixed at the output end of the lower heat sealing cylinder; The upper heat sealing assembly includes an upper heat sealing cylinder vertically fixed on the frame, and an upper heat sealing strip that is vertically opposite to the lower heat sealing strip is fixed at the output end of the upper heat sealing cylinder.

[0012] The upper heat sealing strip is fixed with a pair of heat sealing guide columns placed on both sides of the upper heat sealing cylinder, and the heat sealing guide columns are slidably connected to the heat sealing guide sleeve fixed on the frame; The lower heat-sealing cylinder is fixed on the heat-sealing slide plate, which is slidably mounted on the frame via a vertical heat-sealing guide rail. The heat-sealing slide plate is threadedly connected to a vertical transmission screw and a horizontal lower heat-sealing height adjusting screw, which are connected to the transmission screw via a bevel gear set.

[0013] The upper heat sealing assembly and the lower heat sealing assembly are provided with a material blocking mechanism on the side near the packaging bag; The material blocking mechanism includes a pin insertion cylinder fixed on the frame, a pin insertion slide plate fixed at the output end of the pin insertion cylinder, and the pin insertion slide plate is vertically slidably mounted on the frame via a pin insertion guide rail; a pair of pins are fixed on the lower side of the pin insertion slide plate.

[0014] The beneficial effects of this utility model are: The bag opening and sealing device, through its displacement mechanism, mouth-supporting mechanism, clamping component, and heat-sealing component, can stably open and press the bag opening and perform thermoplastic sealing, ensuring packaging consistency. Adjustable components such as the upper limit screw, lower width adjustment screw, upper bag-pressing height adjustment screw, and lower heat-sealing height adjustment screw in the device can be adjusted according to different sized packaging bags, enabling the device to adapt to various specifications of packaging bags. This provides strong versatility and flexibility, improving packaging accuracy and quality. During operation, only manual placement of the large packaging bags in a fixed position is required. The remaining operations are automatically completed by the bag opening and sealing device, eliminating the need for manual opening of the bag and packaging operations. This allows for continuous operation, improving packaging efficiency and reducing labor requirements and costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a perspective view of a packaging bag opening and sealing device according to the present invention.

[0017] Figure 2 This is a front view of the support mechanism and the displacement mechanism in this utility model.

[0018] Figure 3 This is a perspective view of the support mechanism and the displacement mechanism in this utility model.

[0019] Figure 4 for Figure 2 The left view in the image.

[0020] Figure 5 for Figure 2 The right view in the image.

[0021] Figure 6 This is a front view of the lower clamping component in this utility model.

[0022] Figure 7 This is a perspective view of the lower clamping component in this utility model.

[0023] Figure 8 for Figure 6 The right view in the image.

[0024] Figure 9 This is a perspective view of the upper clamping component in this utility model.

[0025] Figure 10 This is a front view of the upper clamping component in this utility model.

[0026] Figure 11 for Figure 10 The right view in the image.

[0027] Figure 12 This is a perspective view of the upper heat-sealing component in this utility model.

[0028] Figure 13 This is a front view of the heat-sealing component in this utility model.

[0029] Figure 14 The three-dimensional heat sealing assembly of this utility model Figure 1 .

[0030] Figure 15 This is a front view of the lower heat-sealing component in this utility model.

[0031] Figure 16 The three-dimensional heat sealing assembly of this utility model Figure 2 .

[0032] Figure 17 This is a front view of the material blocking mechanism in this utility model.

[0033] Figure 18 This is a perspective view of the material blocking mechanism in this utility model.

[0034] Figure 19 for Figure 18 The left view in the image.

[0035] 1. Material blocking mechanism; 101. Pin insertion cylinder; 102. Pin insertion slide plate; 103. Pin insertion guide rail; 104. Pin; 2. Install the heat-sealing assembly; 201. Upper heat-sealing cylinder; 202. Upper heat-sealing strip; 203. Heat-sealing guide post; 204. Heat-sealing guide sleeve; 3. Lower heat-sealing assembly; 301. Lower heat-sealing cylinder; 302. Lower heat-sealing strip; 303. Heat-sealing slide plate; 304. Heat-sealing guide rail; 305. Transmission screw; 306. Bevel gear set; 307. Lower heat-sealing height adjusting screw; 4. Upper clamping assembly; 401. Upper pressure bag cylinder; 402. Upper pressure strip; 403. Pressure bag slide plate; 404. Pressure bag guide rail; 405. Upper pressure bag height adjustment screw; 5. Lower clamping assembly; 501. Pressure bag cylinder; 502. Pressure strip; 503. Pressure bag guide post; 504. Pressure bag guide sleeve; 6. Support mechanism; 601. Upper slide; 602. Lower slide; 603. Upper bag clamping cylinder; 604. Lower bag clamping cylinder; 605. Insert plate; 606. Expansion / contraction cylinder; 607. Upper width adjusting screw; 608. Lower width adjusting screw; 609. Slide rod; 610. Upper limit screw; 7. Displacement mechanism; 701. Positioning bracket; 702. Positioning cylinder; 703. Positioning slide rail; 8. Rack. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other indicating directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model.

[0037] Example 1: like Figure 1 As shown, this utility model provides a packaging bag opening and sealing device, which mainly includes a displacement mechanism 7 and a mouth-supporting mechanism 6 installed on the frame 8.

[0038] Combination Figures 1 to 3 As shown, the positioning mechanism 7 includes two positioning slide rails 703 fixed on the frame 8, and the lower end of the positioning bracket 701 is fixed to four sliders on the positioning slide rails 703. A positioning cylinder 702 is fixed on the frame 8 between the two positioning slide rails 703, and the output end of the positioning cylinder 702 is fixedly connected to the positioning bracket 701. The positioning cylinder 702 is a two-position cylinder, capable of moving the positioning bracket 701 in three working positions: front, middle, and rear. Figure 2 The direction in which the intermediate displacement cylinder 702 extends is defined as the front side.

[0039] Combination Figures 1 to 5 As shown, the opening support mechanism 6 is installed on the displacement bracket 701 and mainly includes an adjustable upper slide 601, a lower slide 602, and four sets of rectangularly distributed insert assemblies located on the upper slide 601 and the lower slide 602. The four sets of insert assemblies can move synchronously in the vertical plane to open the bag opening.

[0040] A pair of vertical slide rods 609 are fixed to the front side of the positioning bracket 701. The two ends of the upper slide 601 and the lower slide 602 are slidably mounted on the corresponding slide rods 609. The lower bag-holding cylinder 604 is fixed to the positioning bracket 701 below the lower slide 602 and is used to drive the lower slide 602 to move up and down. The upper bag-holding cylinder 603 is fixed to the upper positioning bracket 701 of the upper slide 601 and is used to drive the upper slide 601 to move up and down. A vertical upper limit screw 610 is provided above the upper slide 601 and is threaded to the positioning bracket 701. The upper limit screw 610 is used to adjust and limit the rising height of the upper slide 601 to accommodate packaging bags of different sizes and adjust the height of the packaging bag opening.

[0041] Two insert assemblies are slidably mounted on the upper slide 601 and the lower slide 602 respectively. The insert assemblies on the upper slide 601 and the lower slide 602 are symmetrical vertically, and the two insert assemblies on the same slide are symmetrical horizontally. Taking the insert assembly on the lower slide 602 as an example: Two insert assemblies are positioned at both ends of the lower slide frame 602, including insert 605 and expansion / contraction cylinder 606. Two parallel slide rails are fixed to the upper side of the lower slide frame 602, and sliders are slidably mounted on the slide rails. Insert 605 and expansion / contraction cylinder 606 are respectively fixed on the sliders on their corresponding sides, and the output end of expansion / contraction cylinder 606 is fixedly connected to insert 605. In addition, a lower width adjusting screw 608 parallel to the slide rails is rotatably mounted on the lower slide frame 602. The lower width adjusting screw 608 is threadedly connected to the slider under expansion / contraction cylinder 606. The lower width adjusting screw 608 is a bidirectional screw with opposite threads at both ends. By rotating the lower width adjusting screw 608, the distance between the two expansion / contraction cylinders 606 can be adjusted, thereby adjusting the distance between the two inserts 605 when they move outward to their maximum distance, so as to accommodate packaging bags of different sizes and adjust the width of the packaging bag opening.

[0042] Similarly, an upper width adjusting screw 607 is rotatably mounted on the upper slide 601, and the spacing between the two insert assemblies on the upper slide 601 can be adjusted by the upper width adjusting screw 607.

[0043] During operation, the inserts 605 in the four insert assemblies retract, their front ends inserting into the opening of the packaging bag. Then, the four inserts 605 expand to the left, right, up, and down to maximize the opening of the packaging bag. Each insert 605 includes a flat plate and a side plate fixed to the outer edge of the flat plate, with a rounded corner between them. The four expanded inserts 605 form a guide channel, which guides the material as it is pushed into the packaging bag. For this purpose, the rear end of each insert 605 is bent into a funnel-shaped guide opening to better guide the material.

[0044] Example 2: Based on the above embodiment one, combined with Figure 1 As shown, the upper and lower sides of the four sets of insert components are respectively provided with upper clamping component 4 and lower clamping component 5. When the four inserts 605 open the bag opening, the upper clamping component 4 and lower clamping component 5 respectively press against the inserts 605 to achieve the pressing of the upper and lower sides of the bag opening.

[0045] Combined Figures 6 to 8 As shown, the lower clamping assembly 5 is located in front of the displacement mechanism 7, including a pressure bag cylinder 501 vertically fixed on the frame 8. The output end of the pressure bag cylinder 501 is arranged upwards, and a pressure strip 502 is fixed to the output end. A silicone strip is fixed to the upper side of the pressure strip 502 to better fit with the lower side of the insert 605 and fix the bag opening. A pressure bag guide sleeve 504 fixed to the frame 8 is arranged parallel to one side of the pressure bag cylinder 501. A pressure bag guide post 503 is slidably installed in the pressure bag guide sleeve 504, and the upper end of the pressure bag guide post 503 is fixed to the pressure strip 502. The pressure bag guide post 503 and the pressure bag guide sleeve 504 guide the pressure strip 502 and improve the stability of the pressure strip 502. During operation, after the four inserts 605 open the bag opening, the pressure cylinder 501 extends and the pressure bar 502 presses down on the two inserts 605 on the lower side, thereby pressing the lower side of the bag opening tightly.

[0046] Combination Figures 9 to 11As shown, the upper clamping assembly 4 is located in front of the displacement mechanism 7 and is vertically opposite to the lower clamping assembly 5. The upper clamping assembly 4 includes a bag-pressing slide plate 403, which is slidably mounted on the frame 8 via a pair of vertical bag-pressing guide rails 404. A pair of parallel upper bag-pressing cylinders 401 are arranged between the bag-pressing slide plate 403 and the frame 8. The output ends of the two upper bag-pressing cylinders 401 are arranged downwards, and upper pressing strips 402 are fixed to the output ends. Silicone strips are also installed on the lower side of the upper pressing strips 402. A vertical upper bag-pressing height adjusting screw 405 is rotatably connected to the upper end of the bag-pressing slide plate 403. The upper bag-pressing height adjusting screw 405 is threadedly connected to a fixed seat, which is fixed on the frame 8. During operation, after the four inserts 605 open the bag opening, the upper pressing cylinder 401 extends, and the upper pressing strip 402 presses down on the two upper inserts 605, thereby pressing the upper side of the bag opening tightly. By adjusting the upper pressing height adjusting screw 405, the height of the pressing slide plate 403 and the upper pressing cylinder 401 can be changed, so that the upper pressing strip 402 can adapt to the height of the bag opening after different packaging bags are opened.

[0047] Example 3: Based on the above-described embodiment two, combined with Figure 1 As shown, an upper heat-sealing component 2 and a lower heat-sealing component 3 are respectively provided on the front side of the upper clamping component 4 and the lower clamping component 5. After the packaging bag is filled with materials, the upper heat-sealing component 2 and the lower heat-sealing component 3 close to seal the opening of the packaging bag.

[0048] Combined Figure 12 and Figure 13 As shown, the upper heat-sealing assembly 2 includes a vertically arranged upper heat-sealing cylinder 201, which is fixed to the back side of the frame 8 on which the upper clamping assembly 4 is installed. In this embodiment, the frame 8 is composed of multiple separate parts, but the separate parts are relatively fixed to each other. The output end of the upper heat-sealing cylinder 201 is arranged downwards, and an upper heat-sealing strip 202 is fixed to the output end. The lower side of the upper heat-sealing strip 202 is made of high-temperature resistant silicone. Heat-sealing guide posts 203 are arranged parallel to each other on both sides of the upper heat-sealing cylinder 201. The heat-sealing guide posts 203 are slidably fitted onto the heat-sealing guide sleeve 204, which is fixed to the frame 8. During operation, after the packaging bag is filled with materials, the upper heat-sealing cylinder 201 drives the upper heat-sealing strip 202 to descend. The heat-sealing guide posts 203 and the heat-sealing guide sleeve 204 guide the upper heat-sealing strip 202, improving its stability.

[0049] Combination Figures 14 to 16As shown, the lower heat-sealing assembly 3 includes a heat-sealing slide plate 303, which is slidably mounted on the frame 8 via a pair of vertical heat-sealing guide rails 304. A lower heat-sealing cylinder 301 is fixed to the heat-sealing slide plate 303, with its output end facing upwards. A lower heat-sealing strip 302, vertically opposite to the upper heat-sealing strip 202, is fixed to the output end. The lower heat-sealing strip 302 is made of bakelite; the bakelite cooperates with the upper heat-sealing strip 202 to perform thermoplastic sealing on the opening of the packaging bag. A transmission screw 305 and a lower heat-sealing height adjusting screw 307 are both rotatably mounted on the frame 8 via a support. The transmission screw 305 is vertically arranged and threadedly connected to the heat-sealing slide plate 303. One end of the transmission screw 305 is connected to the lower heat-sealing height adjusting screw 307 via a bevel gear set 306. During operation, after the packaging bag is filled with materials, the lower heat-sealing cylinder 301 drives the lower heat-sealing strip 302 to rise, pressing it together with the upper heat-sealing strip 202 against both sides of the bag opening. The lower heat-sealing strip 302 is heated to achieve a thermoplastic seal on the bag opening. By rotating the lower heat-sealing height adjusting screw 307, the height of the heat-sealing slide plate 303 and the lower heat-sealing cylinder 301 can be adjusted, thereby controlling the maximum height of the lower heat-sealing strip 302 to adapt to the height of the bag opening after different packaging bags are opened. That is, the combined lower heat-sealing strip 302 and upper heat-sealing strip 202 are basically in the center of the packaging bag, preventing the heat seal from deviating to one side.

[0050] Combined Figures 17 to 19 As shown, a material blocking mechanism 1 is also provided on the front side of the upper heat sealing assembly 2 to block the material in the packaging bag during the heat sealing process. The material blocking mechanism 1 includes a pin insertion slide plate 102, which is slidably mounted on the frame 8 via a pair of vertical pin insertion guide rails 103; a pin insertion cylinder 101 is vertically fixed on the frame 8, with its output end facing downwards and fixedly connected to the pin insertion slide plate 102; a pair of pins 104 are fixed on the lower side of the pin insertion slide plate 102. During operation, after the packaging bag is filled with material, the pin insertion cylinder 101 drives the pin insertion slide plate 102 and the pins 104 to descend, and the two pins 104 insert into the opening of the packaging bag, blocking the material inside the packaging bag, preventing the material from moving beyond the bag opening and preventing the packaging bag itself from moving, thus avoiding affecting the heat sealing operation of the upper heat sealing assembly 2 and the lower heat sealing assembly 3.

[0051] Working principle: 1. Place the packaging bag flat on the packaging table in front of the bag opening device. The bag opening will be opened by the suction cups that can be raised and lowered on the upper and lower sides. 2. When the four inserts 605 are in the retracted state, the displacement cylinder 702 drives the displacement bracket 701 to move forward to the front working position, so that the front ends of the four inserts 605 enter the opening of the packaging bag. 3. The lower bag cylinder 604 pulls the lower slide 602 downwards, and the upper bag cylinder 603 pulls the upper slide 601 upwards; simultaneously, the four expansion cylinders pull the inserts 605 outwards, causing the four inserts 605 to be in an expanded state, such as... Figure 4 As shown, this is used to tighten the opening of the packaging bag; 4. The displacement cylinder 702 drives the displacement bracket 701, the four inserts 605, and the packaging bag on them to move backward to the middle working position; 5. The lower pressing cylinder 501 drives the lower pressing strip 502 to rise, pressing the lower side of the bag opening against the lower side of the two insert pieces 605 on the lower side; at the same time, the upper pressing cylinder 401 drives the upper pressing strip 402 to fall, pressing the upper side of the bag opening against the upper side of the two insert pieces 605 on the upper side. 6. The four expanded inserts 605 form a guide channel to convey materials into the packaging bag until the packaging bag is full; 7. The needle insertion cylinder 101 drives the needle insertion slide plate 102 and the needle 104 to descend, and the two needles 104 are inserted into the opening of the packaging bag and press against the material inside the packaging bag. 8. The lower pressure bag cylinder 501 drives the lower pressure strip 502 to descend and reset, and the upper pressure bag cylinder 401 drives the upper pressure strip 402 to rise and reset; then, the lower bag clamping cylinder 604 pushes the lower slide frame 602 upward and resets, and the upper bag clamping cylinder 603 pushes the upper slide frame 601 downward and resets; at the same time, the four expansion and contraction cylinders push the inserts 605 inward, so that the four inserts 605 move closer to each other and reset, and are in a contracted state; finally, the displacement cylinder 702 drives the displacement bracket 701 and the four inserts 605 to move backward to the rear working position; 9. The upper heat-sealing cylinder 201 drives the upper heat-sealing strip 202 to descend, and the lower heat-sealing cylinder 301 drives the lower heat-sealing strip 302 to rise. The lower heat-sealing strip 302 and the upper heat-sealing strip 202 clamp the opening of the packaging bag and perform heat sealing on the opening of the packaging bag. After completion, the upper heat-sealing cylinder 201 drives the upper heat-sealing strip 202 to rise and reset, and the lower heat-sealing cylinder 301 drives the lower heat-sealing strip 302 to descend and reset. 10. Remove the filled and sealed packaging bag; repeat the above steps to proceed to the next packaging operation.

[0052] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. Those skilled in the art can make various modifications and variations to the present invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A packaging bag opening and sealing device, characterized in that, include: The displacement bracket is horizontally slidably mounted on the frame. A displacement cylinder is used to drive the displacement bracket to slide on the frame; The upper slide and the lower slide are vertically slidably mounted on the displacement bracket, respectively; The upper bag cylinder is used to drive the upper slide to slide on the displacement bracket; The lower bag cylinder is used to drive the lower slide frame to slide on the displacement bracket; Two insert assemblies are slidably mounted on the upper slide and the lower slide, respectively, and the sliding direction of the insert assembly is perpendicular to that of the displacement bracket; the insert assembly includes an insert for inserting into the opening of the packaging bag, and an expansion cylinder for driving the insert to slide. The upper slide and the lower slide are respectively rotatably mounted with an upper width adjusting screw and a lower width adjusting screw; The upper width adjusting screw is threadedly connected to two expansion cylinders on the upper slide, and is used to adjust the distance between the two expansion cylinders on the upper slide; The lower width adjusting screw is threadedly connected to two expansion cylinders on the lower slide frame, and is used to adjust the distance between the two expansion cylinders on the lower slide frame.

2. The packaging bag opening and sealing device according to claim 1, characterized in that: A pair of displacement slide rails are fixed on the frame; the displacement bracket is installed on the displacement slide rails and has three working positions: front, middle and rear.

3. The packaging bag opening and sealing device according to claim 1, characterized in that: A pair of vertical sliding rods are fixed on the displacement bracket, and the two ends of the upper sliding frame and the lower sliding frame are slidably mounted on the sliding rods on the corresponding sides. An upper limit screw that cooperates with the upper slide is installed on the upper side of the displacement bracket.

4. The packaging bag opening and sealing device according to claim 1, characterized in that: The insert and the expansion cylinder in the insert assembly are respectively slidably mounted on the corresponding upper slide and lower slide; The output end of the expansion cylinder is fixedly connected to the insert plate, and the expansion cylinder is threadedly connected to the corresponding upper width adjusting screw and lower width adjusting screw.

5. The packaging bag opening and sealing device according to claim 1, characterized in that: The insert includes a flat plate and a side plate fixed to the outer side of the flat plate. The four inserts form a guide channel for conveying materials. The insert has a flared guide opening at the end furthest from the bag opening.

6. The packaging bag opening and sealing device according to claim 1, characterized in that: The four inserts are respectively provided with an upper clamping component and a lower clamping component on the upper and lower sides, and the upper clamping component and the lower clamping component are located on the side of the inserts closer to the packaging bag; The lower clamping assembly includes a lower pressing bag cylinder that is vertically fixed on the frame, and the output end of the lower pressing bag cylinder is fixed with a lower pressing strip for pressing the lower side of the two inserts on the lower side; The upper clamping assembly includes an upper pressing cylinder that is vertically slidably mounted on the frame, and the output end of the upper pressing cylinder is fixed with an upper pressing strip for pressing against the upper side of the two upper inserts.

7. The packaging bag opening and sealing device according to claim 6, characterized in that: The lower pressure bar is fixed with a pressure guide post parallel to the lower pressure bag cylinder, and the pressure guide post is slidably connected to the pressure guide sleeve fixed on the frame; The upper pressing cylinder is fixed on the pressing slide plate, which is slidably mounted on the frame via a vertical pressing guide rail. The upper side of the pressing slide plate is rotatably connected to an upper pressing height adjusting screw, which is threadedly connected to a fixed seat on the frame.

8. A packaging bag opening and sealing device according to claim 6, characterized in that: The upper heat sealing assembly and the lower heat sealing assembly are respectively provided above and below the four inserts, and the upper heat sealing assembly and the lower heat sealing assembly are located on the side of the upper clamping assembly and the lower clamping assembly that are close to the packaging bag; The lower heat sealing assembly includes a lower heat sealing cylinder that is vertically slidably mounted on the frame, and a lower heat sealing strip for heat sealing operation is fixed at the output end of the lower heat sealing cylinder; The upper heat sealing assembly includes an upper heat sealing cylinder vertically fixed on the frame, and an upper heat sealing strip that is vertically opposite to the lower heat sealing strip is fixed at the output end of the upper heat sealing cylinder.

9. A packaging bag opening and sealing device according to claim 8, characterized in that: The upper heat sealing strip is fixed with a pair of heat sealing guide columns placed on both sides of the upper heat sealing cylinder, and the heat sealing guide columns are slidably connected to the heat sealing guide sleeve fixed on the frame; The lower heat-sealing cylinder is fixed on the heat-sealing slide plate, which is slidably mounted on the frame via a vertical heat-sealing guide rail. The heat-sealing slide plate is threadedly connected to a vertical transmission screw and a horizontal lower heat-sealing height adjusting screw, which are connected to the transmission screw via a bevel gear set.

10. A packaging bag opening and sealing device according to claim 9, characterized in that: The upper heat sealing assembly and the lower heat sealing assembly are provided with a material blocking mechanism on the side near the packaging bag; The material blocking mechanism includes a pin insertion cylinder fixed on the frame, a pin insertion slide plate fixed at the output end of the pin insertion cylinder, and the pin insertion slide plate is vertically slidably mounted on the frame via a pin insertion guide rail; a pair of pins are fixed on the lower side of the pin insertion slide plate.

Images