Heat-sealing pressing plate assembly and sealing machine

Abstract

The utility model discloses a heat-sealing pressing plate assembly which comprises a bottom plate, a first hot pressing plate, a second hot pressing plate and a third hot pressing plate, the first hot pressing plate is an isosceles triangle-shaped first hot pressing plate, the second hot pressing plate is a long-strip-shaped second hot pressing plate, and the third hot pressing plate is a square-strip-shaped third hot pressing plate; the first hot pressing plate, the second hot pressing plates and the third hot pressing plates are all arranged on the bottom plate, the two second hot pressing plates and the two third hot pressing plates are arranged, the two ends of the first hot pressing plate are connected with the second hot pressing plates respectively, the two ends of the second hot pressing plates are connected with the first hot pressing plate and the third hot pressing plates respectively, and the first hot pressing plate and the third hot pressing plates are arranged on the bottom plate. The width of the third hot pressing plate is larger than that of the second hot pressing plate, and the width of the second hot pressing plate is larger than that of the first hot pressing plate. The utility model further discloses the sealing machine comprising the heat-sealing pressing plate assembly.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tools for packaging material preparation, and in particular to a heat-sealing pressure plate assembly and a sealing machine. Background Technology

[0002] Microwaveable bags are currently a commonly used type of packaging bag. Patent publication CN220949281U discloses a type of microwaveable bag. In this type of microwaveable bag, a pressure relief guide is set on the heat-sealed edge of the bag body. The presence of this pressure relief guide makes the heat seal strength at this point relatively weak. When the gas inside the bag expands, the heat-sealed edge containing the pressure relief guide will be torn, thus forming a pressure relief port. Because this type of microwaveable bag contains a pressure relief guide, and the pressure relief guide needs to be placed between the two plastic films before the two plastic films are heat-bonded, if the pressure relief guide has already slipped off between the two plastic films during heat sealing, then the entire microwaveable bag will not contain any weak seal areas, and the entire microwaveable bag will not be able to break during microwave heating. Utility Model Content

[0003] This utility model addresses the above-mentioned problems by proposing a heat-sealing pressure plate assembly.

[0004] The technical solution adopted by this utility model is as follows:

[0005] A heat-sealing plate assembly includes a base plate, a first heat-sealing plate, a second heat-sealing plate, and a third heat-sealing plate. The first heat-sealing plate is an isosceles triangular shape, the second heat-sealing plate is a long strip, and the third heat-sealing plate is a square strip. The first, second, and third heat-sealing plates are all disposed on the base plate. There are two second heat-sealing plates and two third heat-sealing plates. Each end of the first heat-sealing plate is connected to one of the second heat-sealing plates, and each end of the second heat-sealing plate is connected to both the first and third heat-sealing plates. The width of the third heat-sealing plate is greater than the width of the second heat-sealing plate, and the width of the second heat-sealing plate is greater than the width of the first heat-sealing plate.

[0006] In this type of heat-sealing plate assembly, the first hot-pressing plate, the second hot-pressing plate, and the third hot-pressing plate are integrally formed. The first hot-pressing plate, the second hot-pressing plate, and the third hot-pressing plate are made of a metal material with good thermal conductivity, including but not limited to steel. The base plate is also made of a metal material. The base plate and the first hot-pressing plate can be made of the same metal material or different metal materials.

[0007] In this heat-sealing plate assembly, the item is first placed into the bag, and then the bag opening is brought into contact with the first, second, and third heat-sealing plates. The heat from the first, second, and third heat-sealing plates seals the bag opening. Since the width of the third heat-sealing plate is greater than that of the second heat-sealing plate, and the width of the second heat-sealing plate is greater than that of the first heat-sealing plate, and the heat seal at the first heat-sealing plate is the narrowest, it is also the most easily damaged. When the bag is microwaved after sealing, the gas inside the bag expands, causing the bag's volume to increase. Because the heat seal strength at the first heat-sealing plate is the weakest, and the heat seal formed by the first heat-sealing plate is an isosceles triangle, this isosceles triangle is the weak seal, and the apex of the isosceles triangle faces outwards from the bag. This allows the weak seal to be broken by the gas, thus breaking the bag. This heat-sealing plate assembly uses a combination of heat-sealing plates of different shapes to form a weak seal on the heat-sealing edge of the bag. When the gas inside the bag expands, it can break through the weak seal. When sealing the bag, there is no need to place a spacer between the two pieces of the bag, making the whole heat-sealing process simpler. After the heat-sealing is completed, it can ensure that the weak seal can be formed.

[0008] In summary, this heat-sealing plate assembly, by using heat-sealing plates of different shapes, achieves the formation of a weak seal on the heat-sealing edge of the bag. When the gas inside the bag expands, it can break through this weak seal. When sealing the bag, there is no need to place a spacer between the two pieces of the bag, making the entire heat-sealing process simpler. Furthermore, it ensures that the weak seal can be formed after the heat-sealing is completed.

[0009] Optionally, the included angle of the inner top corner of the first hot press plate is 100 degrees, and the included angle of the outer top corner of the first hot press plate is 260 degrees.

[0010] Because the first hot plate is used to form the weak seal, and the shape and size of the weak seal are the same as those of the first hot plate, this ensures that the inner apex angle of the weak seal is 100 degrees and the outer apex angle is 260 degrees. This characteristic of a small inner apex angle and a large outer apex angle is more conducive to the gas breaking through the weak seal.

[0011] Optionally, the two second heat-sealing plates are arranged in a figure-eight shape, and the two third heat-sealing plates are located in a straight line.

[0012] Optionally, a flow guiding hot press plate is also included. The flow guiding hot press plate is disposed on the base plate and is located between two second hot press plates. The flow guiding hot press plate does not contact the first hot press plate, the second hot press plate, or the third hot press plate.

[0013] Optionally, the flow guiding hot press plate includes a main flow hot press plate and a secondary flow guiding hot press plate. There are two secondary flow guiding hot press plates, which are disposed on both sides of the main flow hot press plate. The secondary flow guiding hot press plates do not contact the main flow hot press plate, and an air passage is formed between the main flow hot press plate and the secondary flow guiding hot press plate.

[0014] The main flow hot press plate and the secondary flow hot press plate are used to form an additional independent adhesive part at the bag opening. The existence of these independent adhesive parts can form an air passage, so that the gas rushes to the weak seal when it expands. Secondly, after the weak seal is broken, it can prevent the bag opening from completely opening and causing the liquid inside the bag to overflow.

[0015] Optionally, the two second hot press plates are identical in shape and size.

[0016] Optionally, the two third hot press plates are identical in shape and size.

[0017] A sealing machine, comprising the hot press plate assembly as described above.

[0018] The beneficial effects of this utility model are: by using hot press plates of different shapes, a weak sealing part is formed on the heat-sealed edge of the bag body. When the gas inside the bag expands, it can break through the weak sealing part. When sealing the bag body, there is no need to place a spacer between the two pieces of the bag body. The whole heat-sealing process is simpler, and the weak sealing part can be formed after the heat-sealing is completed. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a simplified structural diagram of the heat-sealing pressure plate assembly;

[0021] Figure 2 This is a simplified diagram illustrating the shape of the bag after it has been sealed by the heat-sealing platen assembly.

[0022] The figures are labeled as follows: 1. First hot press plate; 101. Outer top corner; 102. Inner top corner; 2. Second hot press plate; 3. Third hot press plate; 41. Main flow hot press plate; 42. Secondary flow hot press plate; 40. Air passage; 5. Base plate; 6. Weak seal. Detailed Implementation

[0023] 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.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] Example 1

[0027] As attached Figure 1 As shown, a heat-sealing plate assembly includes a base plate 5, a first heat-sealing plate 1, a second heat-sealing plate 2, and a third heat-sealing plate. The first heat-sealing plate 1 is an isosceles triangular shape, the second heat-sealing plate 2 is a long strip, and the third heat-sealing plate 3 is a square strip. The first heat-sealing plate 1, the second heat-sealing plate 2, and the third heat-sealing plate 3 are all disposed on the base plate 5. There are two second heat-sealing plates 2 and two third heat-sealing plates 3. Each end of the first heat-sealing plate 1 is connected to one second heat-sealing plate 2, and each end of the second heat-sealing plate 2 is connected to both the first heat-sealing plate 1 and the third heat-sealing plate 3. The width of the third heat-sealing plate 3 is greater than the width of the second heat-sealing plate 2, and the width of the second heat-sealing plate 2 is greater than the width of the first heat-sealing plate 1.

[0028] In this type of heat-sealing plate assembly, the first heat-sealing plate 1, the second heat-sealing plate 2, and the third heat-sealing plate 3 are integrally formed. The first heat-sealing plate 1, the second heat-sealing plate, and the third heat-sealing plate 3 are made of a metal material with good thermal conductivity, including but not limited to steel. The base plate 5 is also made of a metal material. The base plate 5 and the first heat-sealing plate 1 can be made of the same metal material or different metal materials.

[0029] In this method of using the heat-sealing pressure plate assembly, the item is first placed into the bag, and then the bag opening is brought into contact with the first heat-sealing plate 1, the second heat-sealing plate 2, and the third heat-sealing plate 3 (the bottom plate does not contact the bag). The heat from the first heat-sealing plate 1, the second heat-sealing plate 2, and the third heat-sealing plate 3 heat-seals the bag opening. The bag opening after sealing is shown in the attached figure. Figure 2 As shown, since the width of the third hot-press plate 3 is greater than the width of the second hot-press plate 2, and the width of the second hot-press plate 2 is greater than the width of the first hot-press plate 1, the heat seal width at the first hot-press plate 1 is the narrowest, making the seal at the first hot-press plate 1 the most vulnerable to damage. When the bag is microwaved after sealing, the gas inside the bag expands, causing the bag's volume to increase. Since the heat seal strength at the first hot-press plate 1 is the weakest, and the heat seal edge formed by the first hot-press plate 1 is an isosceles triangle, this isosceles triangle heat seal portion is the weak seal portion 6, and the apex of the isosceles triangle faces outwards from the bag. This allows the weak seal portion 6 to be broken by the gas, thus breaking the bag. This heat-sealing plate assembly uses heat-sealing plates of different shapes to form a weak seal 6 on the heat-sealing edge of the bag. When the gas inside the bag expands, it can break open the weak seal 6. When sealing the bag, there is no need to place a spacer between the two pieces of the bag. The whole heat-sealing process is simpler, and the weak seal 6 can be formed after the heat-sealing is completed.

[0030] In summary, this heat-sealing plate assembly uses heat-sealing plates of different shapes to form a weak sealing part 6 on the heat-sealing edge of the bag. When the gas inside the bag expands, it can break open the weak sealing part 6. When sealing the bag, there is no need to place a spacer between the two pieces of the bag. The whole heat-sealing process is simpler, and the weak sealing part 6 can be formed after the heat-sealing is completed.

[0031] As attached Figure 1 As shown, the included angle of the inner apex angle 102 of the first hot press plate 1 is 100 degrees, and the included angle of the outer apex angle 101 of the first hot press plate 1 is 260 degrees.

[0032] Because the first hot plate 1 is used to form the weak sealing part 6, and the shape and size of the weak sealing part 6 are the same as those of the first hot plate 1, this ensures that the inner apex angle 102 of the weak sealing part 6 is 100 degrees and the outer apex angle 101 is 260 degrees. This characteristic of the inner apex angle 102 being small and the outer apex angle 101 being large is more conducive to the gas breaking through the weak sealing part 6.

[0033] As attached Figure 1 As shown, the two second heat-sealing plates are arranged in a figure-eight shape, and the two third heat-sealing plates are located on a straight line.

[0034] As attached Figure 1As shown, it also includes a flow guiding hot press plate, which is set on the base plate 5 and located between two second hot press plates 2. The flow guiding hot press plate does not contact the first hot press plate 1, the second hot press plate 2 and the third hot press plate 3.

[0035] As attached Figure 1 As shown, the flow guiding hot press plate includes a main flow hot press plate 41 and secondary flow guiding hot press plates 42. There are two secondary flow guiding hot press plates 42, which are disposed on both sides of the main flow hot press plate 41. The secondary flow guiding hot press plates 42 do not contact the main flow hot press plate 41, and an air passage 40 is formed between the main flow hot press plate 41 and the secondary flow guiding hot press plates 42. The air passage 40 guides the gas as shown in the attached figure. Figure 2 The arrow in the middle points to, attached Figure 2 The shaded area in the image represents the heat-bonding area of ​​the bag. Specifically, the base plate can be a heating plate, and the heat generated on the base plate is transferred to each heat-pressing plate.

[0036] The main flow hot press plate 41 and the secondary flow hot press plate 42 are used to form an additional independent adhesive part at the bag opening. The existence of these independent adhesive parts can form an air passage 40, so that the gas rushes to the weak seal 6 when it expands. Secondly, after the weak seal 6 is opened, it can prevent the bag opening from completely opening and causing the liquid inside the bag to overflow.

[0037] As attached Figure 1 As shown, the two second hot press plates 2 are identical in shape and size.

[0038] As attached Figure 1 As shown, the two third hot press plates 3 are identical in shape and size.

[0039] Example 2

[0040] A sealing machine includes a heat-sealing pressure plate assembly as shown in Example 1.

[0041] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 seal platen assembly characterized by, The heat sealing plate assembly comprises a base plate, a first heat sealing plate, a second heat sealing plate and a third heat sealing plate. The first heat sealing plate is a first heat sealing plate in the shape of an isosceles triangle. The second heat sealing plate is a second heat sealing plate in the shape of a long strip. The third heat sealing plate is a third heat sealing plate in the shape of a square strip. The first heat sealing plate, the second heat sealing plate and the third heat sealing plate are arranged on the base plate. The second heat sealing plate has two pieces. The third heat sealing plate has two pieces. The two ends of the first heat sealing plate are respectively connected to one of the second heat sealing plates. The two ends of the second heat sealing plate are respectively connected to the first heat sealing plate and the third heat sealing plate. The width of the third heat sealing plate is greater than the width of the second heat sealing plate. The width of the second heat sealing plate is greater than the width of the first heat sealing plate.

2. A heat seal platen assembly as claimed in claim 1, wherein, The included angle of the inner vertex angle of the first heat sealing plate is 100 degrees. The included angle of the outer vertex angle of the first heat sealing plate is 260 degrees.

3. A heat seal platen assembly as claimed in claim 1, wherein, The two second heat sealing plates are arranged in the shape of a V. The two third heat sealing plates are arranged on a straight line.

4. A heat seal platen assembly as claimed in claim 1, wherein, The heat sealing plate assembly further comprises a flow guide heat sealing plate. The flow guide heat sealing plate is arranged on the base plate. The flow guide heat sealing plate is arranged between the two second heat sealing plates. The flow guide heat sealing plate does not contact the first heat sealing plate, the second heat sealing plate and the third heat sealing plate.

5. A heat seal platen assembly as claimed in claim 4, wherein, The flow guide heat sealing plate comprises a main flow guide heat sealing plate and a sub flow guide heat sealing plate. The sub flow guide heat sealing plate has two pieces. The two sub flow guide heat sealing plates are arranged on the two sides of the main flow guide heat sealing plate. The sub flow guide heat sealing plate does not contact the main flow guide heat sealing plate. An air channel is formed between the main flow guide heat sealing plate and the sub flow guide heat sealing plate.

6. A heat seal platen assembly as claimed in claim 1, wherein, The two second heat sealing plates have the same shape and size.

7. A heat seal platen assembly as claimed in claim 1, wherein, The two third heat sealing plates have the same shape and size.

8. A sealing machine characterized by The heat sealing plate assembly comprises the heat sealing plate assembly according to any one of claims 1-7.

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