Hot melting assembly

Abstract

The utility model provides a hot melting assembly, and belongs to the technical field of hot melting packaging. The hot melting device is used in a tubular plastic bag sealing system, the tubular plastic bag sealing system comprises a pressing assembly opposite to a hot melting assembly, the hot melting assembly comprises a hot melting base and a heating assembly arranged on the hot melting base, the heating assembly comprises a first heating piece, a heating wire and a second heating piece which are arranged at intervals in the first direction, and the heating wire is located between the two heating pieces; the length direction of the two heating pieces and the length direction of the heating wire are both parallel to the second direction, the length is larger than the length of a bag opening of the plastic bag, and the first direction is perpendicular to the second direction. And the protection plate is arranged on the hot melting seat and covers the heating assembly, and the protection plate is provided with a first heat conduction part opposite to the two heating sheets and a second heat conduction part opposite to the heating wire. The hot melting assembly can effectively improve the qualified rate of no liquid leakage of the sealing of the garbage bag and improve the bearing capacity of the garbage bag.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot melt packaging, and particularly relates to a hot melt assembly. Background Art

[0002] In most of the existing garbage bag sealing devices of intelligent toilets, a method of directly fusing a heating wire or a heating sheet is used to seal the bottom and the opening of two adjacent garbage bags correspondingly. However, this method cannot effectively ensure the sealing performance of the bag bottom or the bag opening, there is a risk of liquid leakage, and the strength of the garbage bag with the sealed bottom is also difficult to meet the load-bearing requirements of the garbage bag.

[0003] For example, the Chinese patent with the authorization announcement number CN212654635U provides a hot melt sealing and cutting device, which uses a "T"-shaped copper sheet to perform melting and fusing at the same time. However, the qualified rate of the garbage bags obtained by this method is relatively low, and most of them will have liquid leakage at the bag corners. Only by using an auxiliary agent (coagulant), the qualified rate will be improved. Summary of the Utility Model

[0004] In view of the above technical problems existing in the prior art, the utility model provides a hot melt assembly, which can effectively improve the qualified rate of the plastic bag sealing without liquid leakage and improve the load-bearing capacity of the garbage bag.

[0005] The technical solution adopted in the embodiment of the utility model is as follows:

[0006] A hot melt assembly is used in a plastic bag sealing system. The plastic bag sealing system includes a pressing assembly opposite to the hot melt assembly. The hot melt assembly includes:

[0007] A hot melt base:

[0008] A heating assembly is arranged on the hot melt base. The heating assembly includes a first heating sheet, a heating wire and a second heating sheet arranged at intervals in a first direction. The heating wire is located between the two heating sheets. The length directions of the two heating sheets and the length direction of the heating wire are all parallel to a second direction, and the lengths are all greater than the length of the plastic bag opening. The first direction and the second direction are perpendicular;

[0009] A protection plate is arranged on the hot melt base and covers the heating assembly. The protection plate has a first heat conduction part opposite to the two heating sheets and a second heat conduction part opposite to the heating wire.

[0010] Further, the hot melt assembly further includes a silica gel block and an isolation sheet. The silica gel block and the isolation sheet are respectively located between the heating assembly and the hot melt base. The silica gel block is fixed on the hot melt base, and the isolation sheet is located between the silica gel block and the heating assembly and covers the silica gel block.

[0011] Further, the silica gel block is adhered to the hot melt base by back glue.

[0012] Further, the projection of the protection plate on the hot melt base and the projection of the isolation sheet on the hot melt base both cover the projection of the heating component on the hot melt base.

[0013] Further, the hot melt assembly further includes a first pressing piece and a second pressing piece. The first pressing piece is arranged at the first end of the hot melt base along the first direction, and the second pressing piece is arranged at the second end of the hot melt base along the first direction. The two pressing pieces are respectively connected to the hot melt base to fix the protection plate and the isolation sheet on the hot melt base respectively.

[0014] Further, both ends in the length direction of the first heating sheet and both ends in the length direction of the second heating sheet respectively have mounting ears, and the mounting ears are connected to the hot melt base.

[0015] Further, the hot melt assembly further includes a temperature sensor. The temperature sensor is fixed on the hot melt base and abuts against the first heating sheet and / or the second heating sheet to detect the temperature of the first heating sheet and / or the second heating sheet.

[0016] Further, the hot melt base is provided with a mounting hole, and the silica gel block is provided with a through hole coaxially arranged with the mounting hole. The temperature sensor passes through the through hole and is fixed in the mounting hole.

[0017] Further, the surface of the protection plate is provided with a wire groove recessed in the direction away from the heating component, and a groove body convex part is formed on the side of the protection plate facing away from the heating component. The groove body convex part forms the second heat conduction part, and the heating wire is placed in the wire groove.

[0018] Further, the hot melt base is provided with a belt fixing seat, and the belt fixing seat can connect a toothed belt.

[0019] Compared with the prior art, the beneficial effects of the embodiment of the present utility model are as follows:

[0020] When the hot melt assembly of the present utility model cooperates with the pressing plate assembly to perform hot melt sealing on a cylindrical plastic bag, the two heating sheets can be first energized to heat and perform hot melt sealing on the bag mouths and bag bottoms of two adjacent plastic bags respectively, and then the heating wire is energized to heat, so as to cut off the two plastic bags. In this way, the sealing performance of the garbage bag with the sealed bag mouth is improved, effectively improving the qualified rate of the garbage bag with a leak-free seal. The garbage bag with the sealed bag bottom not only has high sealing performance but also has high strength, meeting the load-bearing requirements of the garbage bag.

[0021] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0022] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with alphabetical suffixes or different alphabetical suffixes may represent different instances of similar components. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and the claims are used to explain the disclosed embodiments. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be an exhaustive or exclusive embodiment of the device or method.

[0023] Figure 1 It is an exploded view of a hot melt assembly according to an embodiment of the present utility model;

[0024] Figure 2 It is a three-dimensional structure diagram of a hot melt assembly according to an embodiment of the present utility model;

[0025] Figure 3 It is a three-dimensional structure diagram of a protective plate according to an embodiment of the present utility model;

[0026] Figure 4 It is a partial structure diagram of a plastic bag sealing system in the related art.

[0027] In the figure: 10, hot melt assembly; 100, hot melt base; 101, first heating sheet; 102, second heating sheet; 103, heating wire; 104, isolation sheet; 105, silica gel block; 106, protective plate; 107, wire groove; 108, first pressing piece; 109, second pressing piece; 110, belt pressing piece; 111, belt seat; 112, guiding hole; 113, bushing; 114, through hole; 115, first heat conducting part; 116, second heat conducting part; 117, temperature sensor; 20, pressing plate assembly. Detailed Embodiments

[0028] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0029] Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings as understood by those of ordinary skill in the field to which this disclosure pertains. The terms "first", "second" and similar words used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] As Figure 1 and Figure 4 shown, an embodiment of the present utility model provides a hot melt assembly for a tubular plastic bag sealing system. Among them, the tubular plastic bag sealing system can be used in other devices for collecting garbage through tubular plastic bags such as intelligent trash cans and intelligent toilets. It mainly includes a hot melt assembly 10 and a pressing plate assembly 20 opposite to the hot melt assembly 10. The pressing plate assembly 20 and the hot melt assembly 10 can approach each other to perform hot melt sealing on the bag mouth of the tubular plastic bag located between the two.

[0031] It should be noted that the tubular plastic bags in this embodiment are separated while being used. For example, taking the first plastic bag for holding garbage as an example, when the pressing plate assembly 20 and the hot melt assembly 10 approach each other, the hot melt assembly 10 can not only seal the bag mouth of the first plastic bag, but also seal the bottom of the second plastic bag, and at the same time cut off the area between the bag mouth of the first plastic bag and the bottom of the second plastic bag, thereby completing the packaging work of the first plastic bag.

[0032] As Figure 1 and Figure 2 shown, the hot melt assembly of this embodiment includes a hot melt base 100, a heating component and a protection plate 106 respectively arranged on the hot melt base 100.

[0033] The heating component includes a first heating sheet 101, a heating wire 103 and a second heating sheet 102 that are all arranged at intervals along the first direction.

[0034] The heating wire 103 is located between the two heating sheets. The first heating sheet 101, the heating wire 103 and the second heating sheet 102 are all strip-shaped. The length directions of the two heating sheets and the length direction of the heating wire 103 are all parallel to the second direction. At the same time, the lengths of the two heating sheets and the heating wire 103 are all greater than the length of the plastic bag mouth.

[0035] In this embodiment, the first direction and the second direction are perpendicular. The first direction can be understood as the vertical direction, and the second direction can be understood as the horizontal direction.

[0036] The protection plate 106 covers the entire heating component. The protection plate 106 has a first heat conduction part 115 opposite to the two heating sheets and a second heat conduction part 116 opposite to the heating wire 103, as shown in Figure 3 the figure. The temperatures of the two heating sheets can be respectively transferred to the first heat conduction part 115, and the temperature of the heating wire 103 can be transferred to the second heat conduction part 116.

[0037] When the pressing plate assembly 20 and the hot melting assembly 10 approach each other, the second heating sheet 102 of the hot melting assembly 10 is used to seal the mouth of the first plastic bag through one of the first heat conduction parts 115, and the first heating sheet 101 is used to seal the bottom of the second plastic bag through the other first heat conduction part 115. The heating wire 103 is used to cut off the area between the mouth of the first plastic bag and the bottom of the second plastic bag through the second heat conduction part 116, thereby completing the packaging work of the first plastic bag.

[0038] When the hot melting assembly 10 of this embodiment cooperates with the pressing plate assembly 20 to perform hot melting sealing on the tubular plastic bag, the two heating sheets can be first powered on and heated to respectively perform hot melting sealing on the mouths and bottoms of two adjacent plastic bags, and then the heating wire 103 is powered on and heated to cut off the two plastic bags. In this way, the sealed plastic bag has improved sealing performance and high strength, effectively improving the qualified rate of the plastic bag sealing without liquid leakage and meeting the load-bearing requirements of the plastic bag.

[0039] As shown in Figure 1 and Figure 2 the figure, in some embodiments, the length of the first heating sheet 101 is the same as the length of the second heating sheet 102. Both are rectangular long strips of the same size and have a certain width, so as to ensure the hot melting area and effectively improve the qualified rate of the plastic bag sealing without liquid leakage.

[0040] Preferably, the two heating sheets are connected to the same heating power supply, and the heating power supply connected to the heating wire 103 is different from that of the two heating sheets. The two heating sheets and the heating wire 103 are respectively independently controlled for heating.

[0041] The two heating sheets are heated simultaneously and have the same temperature after heating. The heating wire 103 is located at the middle position of the area between the two heating sheets, and the heating wire 103 is a straight wire.

[0042] As shown in Figure 1 and Figure 2As shown, in some embodiments, both ends of the first heating sheet 101 in the length direction and both ends of the second heating sheet 102 in the length direction respectively have mounting ears, and the two heating sheets are respectively connected to the hot melt seat 100 through the mounting ears at both ends thereof.

[0043] Specifically, first bolt holes are respectively provided on the mounting ears at both ends of each heating sheet, and second bolt holes opposite to the first bolt holes are provided on the hot melt seat 100. In this way, the two heating sheets can be respectively fixed to the hot melt seat 100 by sequentially passing connecting bolts through the first bolt holes and the second bolt holes.

[0044] Regarding the fixing method of the heating wire 103, both ends of the heating wire 103 can be bent to form fixing sections, through holes for inserting the fixing sections can be provided on the hot melt seat 100, and the heating wire 103 can be fixed to the hot melt seat 100 by inserting the fixing ends into the through holes.

[0045] In some embodiments, the hot melt assembly further includes a silica gel block 105 and an isolation sheet 104. The silica gel block 105 and the isolation sheet 104 are respectively located between the heating assembly and the hot melt seat 100.

[0046] The silica gel block 105 is fixed on the hot melt seat 100, and the material of the silica gel block 105 is a high-temperature resistant silica gel material. The isolation sheet 104 is located between the silica gel block 105 and the heating assembly, and the isolation sheet 104 covers the silica gel block 105 to separate the heating assembly and the silica gel block 105.

[0047] Preferably, the isolation sheet 104 and the protection plate 106 are respectively made of Teflon material with a temperature resistance above 260 °C.

[0048] Through the isolation sheet 104, it is possible to prevent the heating assembly from directly contacting the silica gel block 105, and the silica gel block 105 can prevent the heat generated by the heating assembly from being transferred to the hot melt seat 100.

[0049] In some embodiments, the silica gel block 105 can be adhered to the hot melt seat 100 by back glue, which is convenient for installation, and the isolation sheet 104 is covered and installed on the silica gel block 105.

[0050] In some embodiments, a wire groove 107 formed by being recessed in a direction away from the heating assembly is provided on the surface of the protection plate 106. The wire groove 107 forms a groove body convex portion on the side of the protection plate 106 facing away from the heating assembly, and the groove body convex portion forms a second heat conduction portion 116. The areas of the protection plate 106 on both sides of the groove body convex portion respectively form first heat conduction portions 115. The longitudinal section of the protection plate 106 is approximately in a T-shaped shape.

[0051] The shape of the wire groove 107 is adapted to the shape of the heating wire 103, and the heating wire 103 extends into the wire groove 107. When the protective plate 106 covers the heating component, the heating wire 103 is placed in the wire groove 107, and the first heat conducting part 115 can be against the two heating sheets. In this way, after the bag openings and bag bottoms of two adjacent plastic bags are respectively hot-melt sealed, the plastic bags can be cut directly through the raised part of the heated groove body, which is simple to operate.

[0052] Preferably, the isolation film 104 of this embodiment covers the entire silicone block 105 , and the projection of the protection plate 106 on the hot melt seat 100 and the projection of the isolation film 104 on the hot melt seat 100 both cover the projection of the heating component on the hot melt seat 100 .

[0053] In some embodiments, the hot melt cutting assembly includes a first pressing piece 108 and a second pressing piece 109. The first pressing piece 108 is disposed at the upper end of the hot melt seat 100, and the second pressing piece 109 is disposed at the lower end of the hot melt seat 100.

[0054] The two pressing sheets are respectively connected to the hot melt seat 100 , and the two pressing sheets can simultaneously fix the protection plate 106 and the isolation sheet 104 on the hot melt seat 100 .

[0055] Preferably, the two pressing sheets are also in the shape of long strips, and are respectively buckled on the hot melt seat 100. The two pressing sheets are L-shaped as a whole, and each includes a horizontal sheet portion and a vertical sheet portion. The two pressing sheets are respectively connected to the hot melt seat 100 through their corresponding horizontal sheet portions, and the vertical sheet portions of the two pressing sheets are opposite and respectively abut against the side of the protective plate 106 away from the heating component, so as to fix the isolation sheet 104 and the protective plate 106 on the hot melt seat 100.

[0056] In some embodiments, the hot melt assembly also includes a temperature sensor 117, which is fixed on the hot melt seat 100 and abuts against the first heating plate 101 and / or the second heating plate 102 to detect the temperature of the first heating plate 101 and / or the second heating plate 102 to avoid the temperature of the heating plate being too high after heating, thereby reducing the hot melt effect, or the temperature being too low to reach the hot melt temperature.

[0057] Preferably, the temperature sensor 117 is a NTC (negative temperature coefficient thermistor).

[0058] When the two heating sheets are connected to the same heating power source, the temperature sensor 117 can detect the temperature of only one of the heating sheets. Preferably, the temperature sensor 117 abuts against the first heating sheet 101 above the heating wire and detects its heating temperature.

[0059] Further, in some embodiments, the hot melt base 100 is provided with mounting holes for fixing the temperature sensor 117, and the silica gel block 105 is provided with through holes 114 coaxially arranged with the mounting holes. The temperature sensor 117 can pass through the through holes 114 on the silica gel block 105 and be fixed in the mounting holes of the hot melt base 100. This structure facilitates the temperature sensor 117 to abut against the heating sheet to detect the temperature during its operation. The temperature sensor 117 can be electrically connected to the temperature control system that controls the heating sheet. When the temperature sensor 117 detects that the temperature is too high or too low, it sends a signal to the temperature control system, and the temperature control system then controls the corresponding heating sheet to adjust the temperature according to the received signal.

[0060] In some embodiments, the hot melt base 100 is also in a long strip shape as a whole. Belt fixing seats are respectively arranged at both ends of the hot melt base 100. The belt fixing seat includes a belt seat 111 and a belt pressing piece 110 buckled on the belt seat 111.

[0061] The belt seat 111 is provided with a toothed groove capable of cooperating with the toothed belt. The belt pressing piece 110 is connected to the belt seat 111 and can fix the toothed belt on the belt seat 111, that is, the movement is transmitted through the belt to drive the entire hot melt assembly to move.

[0062] In some embodiments, the hot melt base 100 is further provided with a guide hole 112 and a bushing 113 installed in the guide hole 112. A guide rod can be inserted into the bushing 113, and the guide rod can play a guiding role in the movement of the entire hot melt assembly.

[0063] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A hot melt assembly is used in a tubular plastic bag sealing system. The tubular plastic bag sealing system includes a pressing plate assembly opposite to the hot melt assembly, and is characterized in that, The hot melting assembly includes: A hot melting base (100): A heating assembly disposed on the hot melting base (100). The heating assembly includes a first heating sheet (101), a heating wire (103), and a second heating sheet (102) that are spaced apart along a first direction. The heating wire (103) is located between the two heating sheets. The length directions of the two heating sheets and the length direction of the heating wire (103) are all parallel to a second direction, and their lengths are all greater than the length of the plastic bag opening. The first direction and the second direction are perpendicular to each other. A protection plate (106) disposed on the hot melting base (100) and covering the heating assembly. The protection plate (106) has a first heat conduction portion (115) opposite to the two heating sheets and a second heat conduction portion (116) opposite to the heating wire (103).

2. The hot melt assembly according to claim 1, wherein, The hot melting assembly further includes a silica gel block (105) and an isolation sheet (104). The silica gel block (105) and the isolation sheet (104) are respectively located between the heating assembly and the hot melting base (100). The silica gel block (105) is fixed on the hot melting base (100), and the isolation sheet (104) is located between the silica gel block (105) and the heating assembly and covers the silica gel block (105).

3. The hot melt assembly according to claim 2, characterized in that, The silica gel block (105) is adhered to the hot melting base (100) by back glue.

4. The hot melt assembly according to claim 3, characterized in that, The projection of the protection plate (106) on the hot melting base (100) and the projection of the isolation sheet (104) on the hot melting base (100) both cover the projection of the heating assembly on the hot melting base (100).

5. The hot melt assembly according to claim 2, wherein, The hot melting assembly further includes a first pressing sheet (108) and a second pressing sheet (109). The first pressing sheet (108) is disposed at the first end of the hot melting base (100) along the first direction, and the second pressing sheet (109) is disposed at the second end of the hot melting base (100) along the first direction. The two pressing sheets are respectively connected to the hot melting base (100) to fix the protection plate (106) and the isolation sheet (104) on the hot melting base (100) respectively.

6. A hot melt assembly according to claim 1, wherein Both ends of the first heating sheet (101) in the length direction and both ends of the second heating sheet (102) in the length direction respectively have mounting ears, and the mounting ears are detachably connected to the hot melting base (100).

7. The hot melt assembly according to claim 2, characterized in that, The hot melting assembly further includes a temperature sensor (117). The temperature sensor (117) is fixed on the hot melting base (100) and abuts against the first heating sheet (101) and / or the second heating sheet (102) to detect the temperature of the first heating sheet (101) and / or the second heating sheet (102).

8. A hot melt assembly according to claim 7, wherein The hot melting base (100) is provided with a mounting hole, and the silica gel block (105) is provided with a through hole (114) coaxially arranged with the mounting hole. The temperature sensor (117) passes through the through hole (114) and is fixed in the mounting hole.

9. A hot melt assembly according to claim 2, characterized in that, The surface of the protective plate (106) is provided with a wire groove (107) formed by being recessed in a direction away from the heating component, and a groove body convex part is formed on the surface of the protective plate (106) facing away from the heating component, and the groove body convex part forms the second heat conducting part (116), and the heating wire (103) is placed in the wire groove (107).

10. A hot melt assembly according to claim 1, characterized in that, A belt fixing seat is provided on the hot melt seat (100), and the belt fixing seat can be connected to a toothed belt.

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