Food packaging box heat-shrinkable film packaging machine

Abstract

The utility model discloses a food packaging box heat shrinkage film packaging machine, including base, the base top center place fixedly connected with heating furnace, heating furnace top embedded fixedly connected with linear motor, linear motor drive end bottom fixedly connected with conveying mechanism, heating furnace inner top and inner bottom all are provided with the fixed frame, two the fixed frame mutual side embedded fixedly connected with the heating plate, the base one end is provided with the conveyer belt. The utility model discloses through heating furnace, linear motor, conveying mechanism and conveyer belt between mutual cooperation, on the basis of existing heat shrinkage film packaging machine heating furnace, the length of original heating furnace is reduced half, effectively reduced the overall land occupation of packaging machine, and the heating plate of two parallel and centrally arranged, not only can even heat to the heat shrinkage film of packaging box, improve the shrinkage effect of heat shrinkage film, and the heat is concentrated in the middle of heating furnace, reduces the heat loss in the processing.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, specifically a heat shrink film packaging machine for food packaging boxes. Background Technology

[0002] Food packaging boxes are containers used to package food, serving to protect food quality, extend shelf life, and enhance product value. By encasing food in the box, food packaging prevents physical, chemical, and microbial damage, ensuring food safety and quality during transportation and sales. Furthermore, well-designed packaging can extend shelf life, increase product value, and boost sales.

[0003] When packaging food boxes, a heating furnace at the end of the packaging machine is usually needed to heat and shrink the sealed packaging box, so that the heat-shrink film tightly wraps the outside of the packaging box and provides dust protection.

[0004] In existing heat shrink packaging machines, the workpiece is conveyed into the heating furnace via a conveyor belt and discharged from the other side. Since heating the heat shrink film requires a process, the heating furnace is relatively long. At the same time, the heat in the heating furnace mainly radiates from the top of the packaging box to its center, making the top more easily heated while the bottom is passively heated. This can easily cause a difference in the amount of heat shrink film shrinkage between the top and bottom of the packaging box, affecting the shrinkage effect of the heat shrink film. In severe cases, it can cause wrinkles to appear at the bottom after the heat shrink film shrinks, making it not fit the packaging box properly.

[0005] Therefore, we propose to design a heat shrink film packaging machine for food packaging boxes. Utility Model Content

[0006] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] A heat shrink film packaging machine for food packaging boxes includes a base, a heating furnace fixedly connected to the top center of the base, a linear motor fixedly connected to the top of the heating furnace, a conveying mechanism fixedly connected to the bottom of the drive end of the linear motor, fixed frames provided at the top and bottom of the heating furnace, heating plates fixedly connected to the sides of the two fixed frames that are close to each other, a conveyor belt provided at one end of the base, and a packaging box to be sealed provided at the top of the conveyor belt.

[0009] The conveying mechanism includes a slide fixedly connected to the drive end of a linear motor. A dual-axis motor is fixedly connected to the center of the bottom of the slide. Both drive shafts of the dual-axis motor are fixedly connected to lead screws. A clamping plate is threaded onto the outside of the lead screws. A bracket is fixedly connected to the bottom of the clamping plate. A limit strip is fixedly connected to the top of the bracket.

[0010] As a preferred embodiment of the heat shrink film packaging machine for food packaging boxes described in this utility model, heat insulation layers are provided on the sides of the two fixed frames that are far apart from each other. The heat insulation layers include ceramic fiber boards with a thickness of 20mm. The heat insulation layers can reduce the heat loss of the heating plate and provide heat insulation protection for the dual-axis motor outside the heat insulation layers.

[0011] As a preferred embodiment of the heat shrink film packaging machine for food packaging boxes described in this utility model, a feeding platform is provided between the heating furnace and the conveyor belt. The feeding platform has a triangular cross-section and corresponds to the end position of the heating furnace. Feeding ramps are provided on both sides of the feeding platform. After the packaging box is heat-shrinked, it is released from the top of the feeding platform. The feeding ramps on both sides facilitate the discharge of the packaging box.

[0012] As a preferred embodiment of the heat shrink film packaging machine for food packaging boxes described in this utility model, the limiting strip is an elastic metal sheet, and the outer wall of the elastic metal sheet is wrapped with a silicone layer. When the two clamping plates approach each other, the elasticity of the limiting strip itself facilitates the clamping and positioning of the packaging box.

[0013] As a preferred embodiment of the heat shrink film packaging machine for food packaging boxes described in this utility model, both ends of the packaging box to be sealed extend beyond the sides of the conveyor belt, so that the two brackets at the bottom of the clamping plate can lift the packaging box from the bottom of the packaging box to be sealed, and clamp the packaging box with the limiting strip, so as to facilitate its conveying into the heating furnace.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes the coordinated operation of a heating furnace, a linear motor, a conveying mechanism, and a conveyor belt to reduce the length of the existing heating furnace in a heat shrink packaging machine by half, effectively reducing the overall footprint of the packaging machine. Simultaneously, the two parallel and centrally located heating plates not only uniformly heat the outer heat shrink film of the packaging box, improving its shrinkage effect, but also concentrate heat in the center of the heating furnace, reducing heat loss during processing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a perspective view of a heat shrink film packaging machine for food packaging boxes according to this utility model;

[0018] Figure 2 This is a schematic diagram of the fixing frame structure of a heat shrink film packaging machine for food packaging boxes according to this utility model;

[0019] Figure 3 This is a schematic diagram of the conveying mechanism of a heat shrink film packaging machine for food packaging boxes according to this utility model.

[0020] Legend: 1. Base; 2. Heating furnace; 3. Linear motor; 4. Conveying mechanism; 401. Slide; 402. Dual-axis motor; 403. Lead screw; 404. Clamping plate; 405. Bracket; 406. Limiting strip; 5. Fixing frame; 6. Heating plate; 7. Insulation layer; 8. Conveyor belt; 9. Packaging box to be sealed; 10. Unloading platform. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] Please see Figure 1-3 This utility model provides a heat shrink film packaging machine for food packaging boxes, including a base 1, a heating furnace 2 fixedly connected to the top center of the base 1, a linear motor 3 fixedly connected to the top of the heating furnace 2, a conveying mechanism 4 fixedly connected to the bottom of the drive end of the linear motor 3, and a fixing frame 5 provided at the top and bottom of the heating furnace 2.

[0025] In this embodiment, a heat insulation layer 7 is provided on the side of each of the two fixed frames 5 that is far apart from each other. The heat insulation layer 7 includes a ceramic fiber board with a thickness of 20mm. The heat insulation layer 7 can reduce the heat loss of the heating plate 6 and provide heat insulation protection for the dual-axis motor 402 outside the heat insulation layer 7.

[0026] Heating plates 6 are embedded and fixedly connected to one side of the two fixed frames 5 that are close to each other. A conveyor belt 8 is provided at one end of the base 1, and a packaging box 9 to be sealed is provided on the top of the conveyor belt 8.

[0027] Both ends of the packaging box 9 to be sealed extend beyond the sides of the conveyor belt 8, so that the two brackets 405 at the bottom of the clamping plate 404 can lift the packaging box 9 from the bottom, and the limiting strip 406 can clamp the packaging box to facilitate its conveying into the heating furnace 2.

[0028] A discharge platform 10 is provided between the heating furnace 2 and the conveyor belt 8. The discharge platform 10 has a triangular cross-section and is positioned at the end of the heating furnace 2. Discharge ramps are provided on both sides of the discharge platform 10. After the packaging box is heat-shrinked, it is released from the top of the discharge platform 10. The discharge ramps on both sides facilitate the discharge of the packaging box.

[0029] The conveying mechanism 4 includes a slide 401 fixedly connected to the drive end of the linear motor 3. A dual-axis motor 402 is fixedly connected to the center of the bottom of the slide 401. Both drive shafts of the dual-axis motor 402 are fixedly connected to lead screws 403. A clamping plate 404 is threaded to the outside of the lead screw 403. A bracket 405 is fixedly connected to the bottom of the clamping plate 404. A limit strip 406 is fixedly connected to the top of the bracket 405.

[0030] In this embodiment, the limiting strip 406 is an elastic metal sheet with a silicone layer wrapped around its outer wall. When the two clamping plates 404 approach each other, the elasticity of the limiting strip 406 itself facilitates the clamping and positioning of the packaging box.

[0031] In use, the heating plate 6, linear motor 3, and dual-axis motor 402 are connected to an external power source. In this embodiment, the heating plate 6 is specifically an electric heating plate. The packaging box 9 to be heat-shrinked is conveyed by the conveyor belt 8. The packaging box is covered with an unshrinkable heat-shrink film.

[0032] When the packaging box is conveyed to the end of the conveyor belt 8, the dual-shaft motor 402 in the conveying mechanism 4 drives the lead screws 403 at both ends to rotate, causing the two clamping plates 404 to move towards each other, so that the brackets 405 on both sides first support the bottom of the packaging box at both ends. As the clamping plates 404 move, the limiting strips 406 gradually fit against the sides of the packaging box, clamping and straightening the packaging box so that it enters the heating furnace 2 in a positive and orderly manner.

[0033] Before being placed into the packaging box, the heating plate 6 is turned on for preheating. The linear motor 3 drives the conveying mechanism 4 and the packaging box to move between the upper and lower heating plates 6. The heating plate 6 can heat the heat shrink film from the top and bottom at the same time, so that the heat shrink film gradually adheres to the packaging box.

[0034] Linear motor 3 drives the packaging box into heating furnace 2. After one round trip, it returns to the end near the conveyor belt 8, completing the shrink packaging of the heat shrink film. One round trip of the packaging box in heating furnace 2 constitutes one packaging process.

[0035] Compared to the existing heating furnace 2, its furnace body length can be greatly shortened. At the same time, when assembling the heating furnace 2, the positions of the two heating plates 6 and the spacing between the heating plates 6 can be set according to the size of the packaging box and its external heat shrink film, so that the heating plates 6 can fully radiate heat to the surface of the packaging box, thereby allowing the heat shrink film to adhere tightly to the surface of the packaging box and improve the heat shrink effect.

[0036] The small gap between the two heating plates 6 reduces heat loss; at the same time, the unidirectional discharge method can close one end of the heating furnace 2, reducing heat loss; in this embodiment, the fixing frame 5 is U-shaped, which allows the heating plates 6 to be concentrated in the center of the heating furnace 2, thereby reducing heat loss.

[0037] After heat shrink packaging is completed, at one end of the heating furnace 2 near the conveyor belt 8, the clamp 404 is released, and the packaging box can fall on the top of the unloading table 10. At the same time, the packaging box that has just reached the end of the conveyor belt 8 is clamped.

[0038] In this device, the coordinated operation between the heating plate 6, the linear motor 3, and the dual-axis motor 402 can be achieved through external PLC programming, which is existing technology and will not be described in detail here.

[0039] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat shrink film packaging machine for food packaging boxes, comprising a base (1), characterized in that, A heating furnace (2) is fixedly connected to the top center of the base (1). A linear motor (3) is embedded and fixedly connected to the top of the heating furnace (2). A conveying mechanism (4) is fixedly connected to the bottom of the drive end of the linear motor (3). A fixed frame (5) is provided at the top and bottom of the heating furnace (2). A heating plate (6) is embedded and fixedly connected to the side of the two fixed frames (5) that are close to each other. A conveyor belt (8) is provided at one end of the base (1). A packaging box (9) to be sealed is provided on the top of the conveyor belt (8). The conveying mechanism (4) includes a slide (401) fixedly connected to the drive end of a linear motor (3). A dual-axis motor (402) is fixedly connected to the center of the bottom of the slide (401). Both drive shafts of the dual-axis motor (402) are fixedly connected to lead screws (403). A clamping plate (404) is threaded to the outside of the lead screw (403). A bracket (405) is fixedly connected to the bottom of the clamping plate (404). A limit strip (406) is fixedly connected to the top of the bracket (405).

2. The food packaging box heat shrink film packaging machine according to claim 1, characterized in that, Each of the two fixing frames (5) is provided with a heat insulation layer (7) on the side away from each other. The heat insulation layer (7) includes a ceramic fiber board with a thickness of 20 mm.

3. The food packaging box heat shrink film packaging machine according to claim 1, characterized in that, A discharge platform (10) is provided between the heating furnace (2) and the conveyor belt (8). The discharge platform (10) has a triangular cross-section and corresponds to the end position of the heating furnace (2). Discharge ramps are provided on both sides of the discharge platform (10).

4. A food packaging box heat shrink film packaging machine according to claim 1, characterized in that, The limiting strip (406) is an elastic metal sheet, and the outer wall of the elastic metal sheet is wrapped with a silicone layer.

5. A food packaging box heat shrink film packaging machine according to claim 1, characterized in that, Both ends of the packaging box (9) to be sealed extend beyond the sides of the conveyor belt (8).

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