Glue melting box and continuous glue machine applying same

Abstract

The utility model discloses a glue melting box and a continuous glue machine applying the same, the glue melting box comprises a box body with a cavity, and a plurality of heating rods are arranged on the box body in a penetrating manner; the cavity is in a conical shape, and smooth curve transition is adopted at the section changing position. The continuous glue machine comprises a glue storage unit and a conveying unit, the glue storage unit comprises a glue melting box, a glue barrel assembled above the glue melting box and a glue pressing assembly used for pressing hot melt glue in the glue barrel into the glue melting box. The glue melting box adopts the structure; the conveying unit comprises a glue distributing base assembled at the glue outlet of the glue melting box and a glue pump connected with the glue distributing base and used for quantitatively conveying glue. According to the utility model, the shape of the cavity of the glue melting box is designed to be conical, and smooth curve transition is adopted at the change part of the cross section, so that abrupt change edges and corners are eliminated, storage dead angles do not exist in the cavity of the glue melting box, hot melt glue can smoothly flow out from the glue outlet after being heated and melted in the cavity, and cannot remain in the cavity for a long time; and the hot melt adhesive is prevented from going bad due to repeated heating.

Description

Technical Field

[0001] This utility model belongs to the technical field of hot melt glue machines, specifically relating to a melting box and a continuous glue machine using the same. Background Technology

[0002] Substrate surface coating equipment (such as stencil wrapping machines and profile wrapping machines) typically uses a hot melt adhesive machine to quantitatively deliver adhesive to the coating system within the equipment. Existing hot melt adhesive machines are mainly divided into two types: pressure plate adhesive machines and continuous adhesive machines. However, both have certain drawbacks in practical applications, as follows:

[0003] Plate-type glue dispensers cannot provide continuous glue supply. If an entire barrel of hot melt glue is used up during production, the equipment needs to be stopped for replacement, affecting production efficiency. In addition, plate-type glue dispensers cannot smoothly press / extract the hot melt glue from the bottom of the barrel, resulting in 1-2 kg of hot melt glue remaining in each barrel, causing waste.

[0004] In continuous glue dispensing machines, the melting tank is typically a large box structure with a flat bottom. The glue outlet is located at the bottom of the box and has a slight slope. This large melting tank can generally store 8-10 kg of hot melt glue. Excessive storage means the glue cannot be used up quickly by the substrate surface coating equipment, leading to prolonged heating and aging of the hot melt glue. Furthermore, the flat bottom design of the melting tank creates storage dead zones. Residual hot melt glue in these dead zones is repeatedly heated and deteriorates, resulting in glue waste, difficult cleaning, and potential clogging of the glue hose and glue gun. Utility Model Content

[0005] This utility model provides a melt glue box and a continuous glue machine using the same, aiming to solve the problems of hot melt glue residue and waste in existing continuous glue machines.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a melting box, comprising a box body with a cavity, wherein a plurality of heating rods are mounted on the box body; the cavity is conical in shape and has a smooth curve transition at the section change point.

[0007] As a limitation of this utility model, the glue outlet of the box body is located at the bottom center of the chamber; a filter cylinder is provided at the glue outlet.

[0008] As another limitation of this utility model, a plurality of heat dissipation plates are fixedly provided in the cavity.

[0009] This utility model also discloses a continuous glue machine, including a glue storage unit and a conveying unit; the glue storage unit includes a melting tank, a glue barrel mounted above the melting tank, and a pressing assembly for pressing the hot melt glue in the glue barrel into the melting tank;

[0010] The melting box is the melting box described above;

[0011] The conveying unit includes a glue dispensing seat mounted at the glue outlet of the melt box and a glue pump connected to the glue dispensing seat for quantitatively conveying glue.

[0012] As a limitation of this utility model, the glue bucket includes a bottom plate and a bucket body that are fixedly connected as one piece;

[0013] The base plate has multiple glue leakage holes, and multiple heating rods are inserted through the base plate.

[0014] As a further limitation of this utility model, a heat insulation plate is sandwiched between the bottom plate and the barrel body.

[0015] As a further limitation of this utility model, the heat insulation plate is made of polytetrafluoroethylene.

[0016] As another limitation of this utility model, the adhesive pressing assembly is mounted on the glue tank via a mounting bracket. The adhesive pressing assembly includes a drive cylinder mounted on the mounting bracket and a pressure plate mounted on the output end of the drive cylinder and capable of extending into the glue tank.

[0017] As a further limitation of this utility model, the pressure plate includes a first pressure plate, a second pressure plate, and a third pressure plate fixedly mounted together; the first pressure plate and the third pressure plate are both made of metal and their diameters are smaller than the inner diameter of the glue bucket; the second pressure plate is made of polytetrafluoroethylene and its diameter is adapted to the inner diameter of the glue bucket.

[0018] As a further limitation of this utility model, the mounting frame includes a first column and a second column arranged opposite to each other, and also includes a rotating shaft mounted on the first column and a rotating arm mounted on the rotating shaft.

[0019] The swing arm is horizontally positioned above the rubber bucket, and its free end can rest on the top of the second column.

[0020] The top of the second column is equipped with a positioning pin for positioning the free end of the rotating arm;

[0021] The drive cylinder is mounted on the rotating arm.

[0022] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0023] (1) The biggest improvement of this utility model is that the structure of the melting box in the continuous glue machine has been optimized. Specifically, the shape of the melting box is designed as a cone, and a smooth curve transition is adopted at the section change point to eliminate the abrupt sharp corners. This ensures that there are no dead corners in the melting box chamber. After the hot melt glue is heated and melted in the chamber, it can flow smoothly out of the glue outlet and will not remain in the chamber for a long time, thereby avoiding the hot melt glue from being repeatedly heated and deteriorating.

[0024] (2) The continuous glue machine disclosed in this utility model can be changed after the hot melt glue in the glue bucket is completely pressed into the melting box. During glue change, since there is still hot melt glue in the melting box, it can continue to deliver glue quantitatively to the substrate surface coating equipment. Compared with the existing platen glue machine, glue can be changed without stopping the substrate surface coating equipment, which can improve production efficiency and reduce glue and material waste caused by each glue change stoppage. In addition, the glue bucket in the continuous glue machine is located above the melting box. The glue pressing component can completely press the hot melt glue in the glue bucket into the melting box below, avoiding the situation where hot melt glue remains at the bottom of each glue bucket and cannot be used in the use of the platen glue machine, thus reducing glue waste.

[0025] (3) The glue bucket in this utility model is also a newly designed structure. Specifically, a heat insulation plate made of polytetrafluoroethylene is added between the bottom plate and the body of the glue bucket. The heat insulation plate can prevent the heat of the bottom plate from being transferred to the top of the body of the bucket, thereby effectively preventing the hot melt glue from melting prematurely in the body of the bucket.

[0026] (4) The pressure plate in this utility model is designed as a three-layer structure. The upper first pressure plate and the lower third pressure plate are made of metal and their diameters are smaller than the inner diameter of the glue bucket. The middle second pressure plate is made of polytetrafluoroethylene and its diameter is adapted to the inner diameter of the glue bucket. This structure ensures that when the pressure plate slides up and down inside the glue bucket, only the second pressure plate contacts the inner wall of the glue bucket, avoiding direct contact between the metal first and third pressure plates and the inner wall of the glue bucket, thus avoiding contact friction between metals. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a cross-sectional view showing the structural relationship of the melt box in an embodiment of this utility model;

[0029] Figure 2 This is a schematic diagram of the continuous glue machine in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the continuous glue machine in the state of separation between the glue bucket and the melting tank in this embodiment of the present invention;

[0031] Figure 4This is a schematic diagram of the continuous glue machine in the embodiment of the present invention with the glue pressing component separated from the glue tank;

[0032] Figure 5 This is a schematic diagram of the pressure plate in an embodiment of the present invention.

[0033] In the diagram: 1. Chamber; 2. Glue inlet; 3. Glue outlet; 4. Filter cartridge; 5. Box body; 6. Heating rod; 7. Heat dissipation plate; 8. Melting tank; 9. Glue bucket; 10. Pressing assembly; 11. Support leg; 12. Base plate; 13. Bucket body; 14. Heat insulation plate; 15. Glue leakage hole; 16. Drive cylinder; 17. Pressing plate; 18. First pressing plate; 19. Second pressing plate; 20. Third pressing plate; 21. First column; 22. Second column; 23. Rotating shaft; 24. Rotating arm; 25. Positioning pin; 26. Glue distribution seat; 27. Glue pump. Detailed Implementation

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0035] This embodiment discloses a melt glue box 8, such as Figure 1 and Figure 3 As shown, the glue melting tank 8 includes a tank body 5 with a chamber 1. The top of the tank body 5 is open to form a glue inlet 2, and a through hole is provided at the center of the bottom to form a glue outlet 3. A filter cartridge 4 is fixed at the glue outlet 3 to prevent impurities from entering the glue pump 27 or glue gun and causing blockage. The tank body 5 is made of metal, preferably aluminum alloy or copper alloy. Multiple heating rods 6 are installed at the bottom of the tank body 5, with specific positions as shown... Figure 1 As shown, the heating rod 6 is controlled by a PLC controller and is used to heat the housing 5. Through heat conduction within the housing 5, the hot melt adhesive in the chamber 1 is heated, melting it into glue, which then flows out from the outlet 3. In this embodiment, multiple heat dissipation plates 7 are also fixed inside the chamber 1. The heat dissipation plates 7 are radially distributed at the bottom of the chamber 1 with the outlet 3 as the center, and each heat dissipation plate 7 extends vertically upwards. The heat dissipation plates 7 can improve heat conduction efficiency and accelerate the melting speed of the hot melt adhesive in the chamber 1.

[0036] Furthermore, in this embodiment, the chamber 1 of the housing 5 is conical, and the specific shape is referenced. Figure 1 Furthermore, a smooth curve transition is used at the point of cross-sectional change to ensure that there are no dead storage corners within chamber 1. Of course, chamber 1 can also be designed in other shapes without dead storage corners, such as hemispherical, elliptical, etc., depending on the situation.

[0037] More specifically, this embodiment also reduces the volume of chamber 1. In this embodiment, chamber 1 can hold a maximum of 3 to 5 kilograms of hot melt adhesive, which is basically the amount used by the substrate surface coating equipment for 10 minutes. On the one hand, this can prevent the hot melt adhesive from being heated and aged in chamber 1 for a long time. On the other hand, workers can use this 10-minute time difference to change the adhesive without stopping the machine.

[0038] This embodiment also discloses a continuous gluing machine, such as Figures 2 to 4 As shown, the continuous glue applicator includes a glue storage unit and a conveying unit. The glue storage unit includes a melting tank 8, a glue bucket 9, and a pressing assembly 10. The melting tank 8 adopts the structure described above. In this embodiment, support legs 11 are provided at the bottom of the melting tank 8 to facilitate the installation of the conveying unit below the melting tank 8.

[0039] The glue bucket 9 is hinged above the melting box 8, as shown in the details. Figure 3 As shown, the glue bucket 9 can be lifted from one side to expose the chamber 1 of the melt glue tank 8 below. The glue bucket 9 includes a base plate 12 and a bucket body 13 fixedly connected together, and a heat insulation plate 14 made of polytetrafluoroethylene is sandwiched between the base plate 12 and the bucket body 13. The bucket body 13 is used to store the entire bucket of hot melt glue; the base plate 12 is provided with multiple glue leakage holes 15 for the hot melt glue in the bucket body 13 to flow to the chamber 1 of the melt glue tank 8. Furthermore, multiple heating rods 6 are inserted through the base plate 12, and the heating rods 6 are controlled by a PLC controller to heat the hot melt glue flowing to the chamber 1 of the melt glue tank 8.

[0040] In this embodiment, one side of the base plate 12 is hinged to the glue tank 8 via a shaft, forming a hinged structure between the glue bucket 9 and the glue tank 8. Multiple wing bolts are distributed on the top surface of the glue tank 8. When the base plate 12 is placed over the glue tank 8, the wing bolts are used to lock the base plate 12 onto the glue tank 8. (See detailed reference...) Figure 2 .

[0041] The adhesive application assembly 10 is mounted on top of the adhesive tank 9 via a mounting bracket, such as... Figure 2 and Figure 4 As shown, the adhesive pressing assembly 10 includes a drive cylinder 16 mounted on a mounting bracket and a pressure plate 17 mounted on the output end of the drive cylinder 16. The output end of the drive cylinder 16 points vertically downward. Under the control of the drive cylinder 16, the pressure plate 17 can extend into the glue tank 9 to apply pressure to the hot melt adhesive, causing the hot melt adhesive to flow into the melt box 8 chamber 1 through the glue leakage hole 15. Figure 5 As shown, the pressure plate 17 includes a first pressure plate 18, a second pressure plate 19, and a third pressure plate 20 stacked together and fixedly connected. The first pressure plate 18 and the third pressure plate 20 are both made of metal and have a diameter smaller than the inner diameter of the glue barrel 9; the second pressure plate 19 is made of polytetrafluoroethylene and its diameter is adapted to the inner diameter of the glue barrel 9.

[0042] Furthermore, the mounting frame includes a first column 21, a second column 22, a rotating shaft 23, and a rotating arm 24. For example... Figure 3 As shown, the first column 21 and the second column 22 are arranged opposite each other on both sides of the glue tank 9, wherein the length of the first column 21 is less than the length of the second column 22; the rotating shaft 23 is rotatably mounted on the first column 21; the rotating arm 24 is fixedly mounted on the rotating shaft 23 and is positioned horizontally above the glue tank 9. Under the action of the rotating shaft 23, the rotating arm 24 can rotate to be directly above the glue tank 9 or away from the glue tank 9. Figure 2 As shown, when the rotating arm 24 rotates to be directly above the glue bucket 9, the free end of the rotating arm 24 can rest on the top of the second column 22. In order to temporarily position the rotating arm 24 directly above the glue bucket 9, in this embodiment, a positioning pin 25 for positioning the free end of the rotating arm 24 is installed at the top of the second column 22.

[0043] The aforementioned drive cylinder 16 is mounted on the rotating arm 24. Under the action of the rotating arm 24, the drive cylinder 16 can be positioned directly above the glue tank 9, causing the pressure plate 17 to extend into the glue tank 9 to perform the glue pressing action, as detailed below. Figure 2 As shown; or the drive cylinder 16 can be positioned on one side of the glue tank 9, causing the pressure plate 17 to disengage from the glue tank 9, at which point the employee can perform the glue replacement operation, as shown in the details. Figure 4 As shown.

[0044] The conveying unit includes a dispensing seat 26 mounted at the glue outlet 3 of the melt tank 8 and a glue pump 27 connected to the dispensing seat 26 for meteringly conveying the melted glue in the melt tank 8 to the glue gun. In this embodiment, both the glue pump 27 and the dispensing seat 26 are existing technologies and will not be described in detail.

[0045] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A melt glue box, characterized in that: It includes a box with a cavity, on which multiple heating rods are installed; the cavity is conical in shape and has a smooth curve transition at the point of cross-sectional change.

2. The melt glue box according to claim 1, characterized in that: The glue outlet of the box is located at the bottom center of the chamber; a filter cylinder is provided at the glue outlet.

3. The melt glue box according to claim 1 or 2, characterized in that: Multiple heat dissipation plates are fixed inside the cavity.

4. A continuous gluing machine, characterized in that: It includes a glue storage unit and a conveying unit; the glue storage unit includes a melt tank, a glue bucket mounted above the melt tank, and a pressing assembly for pressing the hot melt glue in the glue bucket into the melt tank; The melting box is the melting box as described in any one of claims 1 to 3; The conveying unit includes a glue dispensing seat mounted at the glue outlet of the melt box and a glue pump connected to the glue dispensing seat for quantitatively conveying glue.

5. The continuous gluing machine according to claim 4, characterized in that: The glue bucket includes a base plate and a bucket body that are fixed together as one piece; The base plate has multiple glue leakage holes, and multiple heating rods are inserted through the base plate.

6. The continuous gluing machine according to claim 5, characterized in that: A heat insulation plate is sandwiched between the bottom plate and the barrel body.

7. The continuous gluing machine according to claim 6, characterized in that: The heat insulation plate is made of polytetrafluoroethylene.

8. The continuous gluing machine according to any one of claims 4-7, characterized in that: The adhesive pressing assembly is mounted above the glue tank via a mounting bracket. The adhesive pressing assembly includes a drive cylinder mounted on the mounting bracket and a pressure plate mounted on the output end of the drive cylinder and capable of extending into the glue tank.

9. The continuous gluing machine according to claim 8, characterized in that: The pressure plate includes a first pressure plate, a second pressure plate, and a third pressure plate fixed together; the first pressure plate and the third pressure plate are both made of metal and their diameters are smaller than the inner diameter of the glue bucket; the second pressure plate is made of polytetrafluoroethylene and its diameter is adapted to the inner diameter of the glue bucket.

10. The continuous gluing machine according to claim 8, characterized in that: The mounting frame includes a first column and a second column arranged opposite to each other, and also includes a rotating shaft mounted on the first column and a rotating arm mounted on the rotating shaft. The swing arm is horizontally positioned above the rubber bucket, and its free end can rest on the top of the second column. The top of the second column is equipped with a positioning pin for positioning the free end of the rotating arm; The drive cylinder is mounted on the rotating arm.

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