Heat sealing device for packaging bag

Abstract

The utility model provides a heat sealing device for a packaging bag, which belongs to the technical field of packaging bag sealing and is provided with a base, a support plate moving vertically is arranged on the base, and two extrusion blocks transversely connected in a sliding manner are arranged on the support plate; the lower end of the left side extrusion block is provided with a through groove transversely penetrating through the left side extrusion block, and a sliding plate used for containing a packaging bag is fixedly installed on the right side extrusion block and slidably connected into the through groove. A vertical plate is fixedly mounted on the base and located at the rear end of the extrusion block, and a vacuum pipe which moves vertically and is used for exhausting air from the packaging bag is arranged on the vertical plate; the vertical plate is further provided with two heat sealing plates which are transversely and slidably connected relative to the vacuum pipe, and heat sealing strips used for conducting heat sealing on a packaging bag are fixedly installed on the opposite faces of the two heat sealing plates. According to the food packaging bag sealing device, the technical problem that the storage time of fresh food is affected due to the fact that internal gas cannot be completely exhausted when an exhausted food packaging bag is sealed only in an extrusion mode is solved.

Description

Technical Field

[0001] This utility model belongs to the field of packaging bag sealing technology, specifically, it relates to a heat sealing device for packaging bags. Background Technology

[0002] In the food processing process, packaging bag sealing machines are needed. In order to keep the food fresh, after the food is put into the packaging, the packaging bag is usually vacuumed to reduce the contact between the food and the air, thereby achieving the purpose of preservation.

[0003] The utility model patent with application number CN202323149888.9 (publication number CN221418863U) provides a plastic bag sealing structure. The movement of a motor moves the second connecting plate toward the first connecting plate, and the sponge rubber pressurizes the plastic bag containing food to expel the air inside the bag. A thermostat heats the heat sealing plate and heat sealing strip to seal the plastic bag.

[0004] The aforementioned patent can seal food packaging bags after venting; however, it cannot completely expel the internal gas by squeezing alone, which will affect the storage time of fresh food when packaging it. Utility Model Content

[0005] In view of this, the present invention provides a heat-sealing device for packaging bags to solve the technical problem that sealing food packaging bags by squeezing alone after the gas has been expelled cannot completely expel the internal gas, which affects the storage time of fresh food.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a heat sealing device for packaging bags, which has a base, wherein the base is provided with a vertically movable support plate, and the support plate is provided with two compression blocks that are horizontally slidably connected;

[0008] The lower end of each of the extrusion blocks on the left is provided with a horizontally penetrating groove, and a sliding plate for placing a packaging bag is fixedly installed on the extrusion block on the right, and the sliding plate is slidably connected in the groove.

[0009] A vertical plate is fixedly installed on the base and at the rear end of the extrusion block. The vertical plate is provided with a vertically movable vacuum tube for evacuating the packaging bag.

[0010] Based on the above technical solution, the heat-sealing device for packaging bags of this utility model can be further improved as follows:

[0011] Furthermore, the upright plate is provided with two clamps that are laterally slidably connected to the vacuum tube, and each of the two clamps has an arc-shaped groove on its opposite side for placing the vacuum tube.

[0012] Furthermore, the upright plate is also provided with two heat-sealing plates that are laterally slidably connected to the vacuum tube, and heat-sealing strips for heat-sealing the packaging bag are fixedly installed on the opposite side of the two heat-sealing plates.

[0013] Furthermore, the base has a horizontally arranged movable groove, in which a drive motor is fixedly installed. The output axis of the drive motor extends to the right, and its end is connected to a double-ended screw via a coupling. The right end of the double-ended screw is rotatably connected to the right wall of the movable groove.

[0014] Furthermore, both sides of the double-ended screw are fitted with screw blocks that are threadedly connected to it. One end of a connecting rod is hinged to the front and rear walls of the screw block. The other end of the connecting rod extends upward and is hinged to the front and rear walls of the support block. The support block is fixedly installed on the bottom wall of the support plate.

[0015] Furthermore, a telescopic cylinder is fixedly installed in the middle of the top wall of the upright plate, and the movable end of the telescopic cylinder extends upward and the vacuum tube is fixedly installed at the end through a connecting plate.

[0016] Compared with the prior art, the beneficial effects of the heat-sealing device for packaging bags provided by this utility model are:

[0017] By setting a support plate to drive the extrusion block to move vertically, and because the packaging bag is placed on the slide plate, the height distance of the bag opening relative to the clamping plate and heat sealing plate can be adjusted, which makes it easy to seal packaging bags of different heights and sizes.

[0018] By setting up a compression block with a lateral sliding connection, the thickness of the packaging bag after the contents are compressed can be adjusted, which facilitates subsequent vacuuming and heat sealing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A front view of the overall structure of a heat-sealing device for packaging bags;

[0021] Figure 2 This is a side view of the upright panel;

[0022] Figure 3 This is an axonometric drawing of the lower structure of the support plate.

[0023] Figure 4 This is an isometric view of a double-headed cylinder.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Base; 10. Support plate; 11. Moving groove; 12. Drive motor; 13. Double-headed screw; 14. Screw block; 15. Connecting rod; 16. Support block; 21. Extrusion block; 210. Slide groove A; 22. Through groove; 23. Slide plate; 3. Vertical plate; 31. Telescopic cylinder; 311. Connecting plate; 32. Vacuum tube; 33. Clamping plate; 330. Slide groove B; 34. Arc groove; 35. Heat sealing plate; 350. Slide groove C; 36. Heat sealing strip; 41. Double-headed cylinder; 42. L-shaped plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Example

[0032] like Figure 1-4 As shown, this utility model provides a heat sealing device for packaging bags, which has a base 1, wherein the base 1 is provided with a vertically movable support plate 10, and the support plate 10 is provided with two horizontally slidably connected extrusion blocks 21.

[0033] The lower end of the left extrusion block 21 is provided with a horizontal through groove 22, and the right extrusion block 21 is fixedly installed with a slide plate 23 for placing packaging bags, and the slide plate 23 is slidably connected in the through groove 22.

[0034] A vertical plate 3 is fixedly installed on the base 1 and at the rear end of the extrusion block 21. The vertical plate 3 is provided with a vertically movable vacuum tube 32 for evacuating the packaging bag.

[0035] Optionally, in the above technical solution, the upright plate 3 is provided with two clamping plates 33 that are laterally slidably connected to the vacuum tube 32, and each of the two clamping plates 33 has an arc-shaped groove 34 for placing the vacuum tube 32 on its opposite side.

[0036] Optionally, in the above technical solution, the upright plate 3 is also provided with two heat-sealing plates 35 that are laterally slidably connected to the vacuum tube 32, and heat-sealing strips 36 for heat-sealing the packaging bag are fixedly installed on the opposite side of the two heat-sealing plates 35.

[0037] Optionally, in the above technical solution, a horizontally arranged movable groove 11 is provided on the base 1, and a drive motor 12 is fixedly installed in the movable groove 11. The output axis of the drive motor 12 extends to the right, and its end is connected to a double-headed screw 13 through a coupling. The right end of the double-headed screw 13 is rotatably connected to the right wall of the movable groove 11.

[0038] Optionally, in the above technical solution, both sides of the double-ended screw 13 are fitted with screw blocks 14 that are threadedly connected to it. One end of a connecting rod 15 is hinged to the front and rear walls of the screw block 14. The other end of the connecting rod 15 extends upward and is hinged to the front and rear walls of the support block 16. The support block 16 is fixedly installed on the bottom wall of the support plate 10.

[0039] Optionally, in the above technical solution, a telescopic cylinder 31 is fixedly installed in the middle of the top wall of the vertical plate 3. The movable end of the telescopic cylinder 31 extends upward and a vacuum tube 32 is fixedly installed at the end through a connecting plate 311.

[0040] The length of the slide plate 23 is greater than the maximum distance between the two extrusion blocks 21; the bottom wall of the screw block 14 abuts against the bottom wall of the moving groove 11; and the longitudinal lengths of the extrusion block 21, the clamping plate 33, and the heat sealing plate 35 are all greater than the longitudinal length of the packaging bag to be sealed.

[0041] Furthermore, a vacuum pump is fixedly installed on the top wall of the upright plate 3. The vacuum pump is connected to the inside of the vacuum tube 32 through an air pipe. The vacuum pump can be replaced by a vacuum generator or a vacuum pump, which are all existing products. Furthermore, a heating wire and a temperature sensor are provided inside the heat sealing strip 36.

[0042] Furthermore, the components used to drive the lateral sliding connection employ a double-headed cylinder 41 and an L-shaped plate 42. The movable end of the double-headed cylinder 41 is fixed to the shorter inner side of the L-shaped plate 42, and the longer outer side of the L-shaped plate 42 is fixedly connected to the rear wall of the clamping plate 33, the rear wall of the heat-sealing plate 35, and the bottom wall of the extrusion block 21. The two clamping plates 33 and the two heat-sealing plates 35 are respectively located on the longer side of the corresponding L-shaped plate 42 and are close to each other. When the movable end of the double-headed cylinder 41 is fully retracted, the two clamping plates 33 can be fully fitted together, and the heat-sealing strips 36 on the two heat-sealing plates 35 can also be fully fitted together.

[0043] Three slids for lateral movement are also provided: slid B330, which is opened on the front wall of the upright plate 3 and corresponds to the vertical position of the clamping plate 33; slid C350, which is opened on the front wall of the upright plate 3 and corresponds to the vertical position of the heat sealing plate 35; and slid A210, which is opened on the top wall of the support plate 10 and corresponds to the longitudinal position of the drive motor 12. The L-shaped plate 42 and the fixed end of the double-headed cylinder 41 are both slidably connected in the slids, and the fixed end of the double-headed cylinder 41 is fixedly installed in the slids.

[0044] Working principle:

[0045] First, adjust the distance between the two extrusion blocks 21 so that the packaging bag containing the food can be placed between the extrusion blocks 21 (avoid the packaging bag tipping over due to excessive distance). Then, place the packaging bag containing the food on the slide plate 23 and adjust the distance between the two extrusion blocks 21 again to adjust the thickness of the packaging bag.

[0046] Based on the height of the packaging bag, the extrusion block 21 drives the packaging bag to move up and down, so that the clamping plate 33 and the heat sealing plate 35 can both contact the packaging bag (the top wall of the clamping plate 33 is slightly lower than the top of the packaging bag, and the bottom wall of the heat sealing plate 35 is higher than the height of the food inside the packaging bag).

[0047] After adjusting the position of the packaging bag, retract the movable end of the telescopic cylinder 31 to allow the vacuum tube 32 to move down and be inserted into the bag through the opening of the packaging bag (the lower end of the vacuum tube 32 is located between the clamping plate 33 and the heat sealing plate 35). Then, bring the two clamping plates 33 closer together to clamp the opening of the packaging bag and make it fit to prevent air from entering.

[0048] The packaging bag is vacuumed through the vacuum tube 32, and then the two heat-sealing plates 35 are brought close together to heat-seal the vacuumed packaging bag. After heat sealing, the heat-sealing plates 35, clamping plates 33, and vacuum tube 32 are reset to their initial states in sequence (in the initial state, the distance between the two clamping plates 33 and the distance between the two heat-sealing plates 35 are at their maximum, and the vacuum tube 32 is at the highest end of its stroke). The packaging bag is then removed, and the operation method is the same for subsequent packaging bags that need to be heat-sealed.

[0049] The compression block 21 moves up and down as follows: the drive motor 12 is started to drive the double-headed screw 13 to rotate in place, and the two screw blocks 14 move closer or further away at the same time. Under the action of hinged connection at both ends of the connecting rod 15, the support block 16 drives the support plate 10 to move up or down, thereby driving the packaging bag on the slide plate 23 to move up and down.

[0050] The movement of clamping plate 33, heat sealing plate 35, and extrusion block 21 is as follows: the double-headed cylinder 41 is activated to drive the two ends of the double-headed cylinder 41 to move closer or further apart, thereby causing the L-shaped plate 42 to slide in the slide groove B330, slide groove C350, and slide groove A210, and the corresponding parts move closer or further apart through the L-shaped plate 42.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat-sealing device for packaging bags, comprising a base (1), characterized in that, The base (1) is provided with a vertically movable support plate (10), and the support plate (10) is provided with two horizontally slidingly connected pressing blocks (21); The lower end of the left-side extrusion block (21) is provided with a transverse through groove (22), and the right-side extrusion block (21) is fixedly installed with a slide plate (23) for placing packaging bags, and the slide plate (23) is slidably connected in the through groove (22); A vertical plate (3) is fixedly installed on the base (1) and at the rear end of the extrusion block (21). The vertical plate (3) is provided with a vertically movable vacuum tube (32) for evacuating the packaging bag.

2. The heat-sealing device for a packaging bag according to claim 1, characterized in that, The upright plate (3) is provided with two clamping plates (33) that are laterally slidably connected to the vacuum tube (32). Each of the two clamping plates (33) has an arc-shaped groove (34) on its opposite side for placing the vacuum tube (32).

3. The heat-sealing device for a packaging bag according to claim 2, characterized in that, The upright plate (3) is also provided with two heat-sealing plates (35) that are laterally slidably connected to the vacuum tube (32). Each of the two heat-sealing plates (35) has a heat-sealing strip (36) fixedly installed on its opposite side for heat-sealing the packaging bag.

4. The heat-sealing device for a packaging bag according to claim 1, characterized in that, The base (1) has a horizontally arranged moving groove (11), and a drive motor (12) is fixedly installed in the moving groove (11). The output axis of the drive motor (12) extends to the right and its end is connected to a double-headed screw (13) through a coupling. The right end of the double-headed screw (13) is rotatably connected to the right wall of the moving groove (11).

5. The heat-sealing device for a packaging bag according to claim 4, characterized in that, Both sides of the double-ended screw (13) are fitted with screw blocks (14) that are threadedly connected to it. One end of a connecting rod (15) is hinged to the front and rear walls of the screw block (14). The other end of the connecting rod (15) extends upward and is hinged to the front and rear walls of the support block (16). The support block (16) is fixedly installed on the bottom wall of the support plate (10).

6. The heat-sealing device for a packaging bag according to claim 1, characterized in that, A telescopic cylinder (31) is fixedly installed in the middle of the top wall of the vertical plate (3). The movable end of the telescopic cylinder (31) extends upward and the vacuum tube (32) is fixedly installed at the end through a connecting plate (311).

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