A heat shrink sleeve application apparatus and method

Abstract

The application discloses a kind of for heat shrinkage sleeve coating glue device, including rack, the top of rack is provided with glue pipe, the inlet end of glue pipe is communicated with existing glue supply equipment, the outlet end of glue pipe is provided with glue head, adjusting mechanism is arranged on rack, adjusting mechanism is used to control the coating glue area of heat shrinkage sleeve to glue pipe, the side of rack is provided with cooling pool, method is also disclosed.The beneficial effects of the present application are: the coating glue area of heat shrinkage sleeve to glue pipe is controlled by adjusting mechanism, so that the two end regions of heat shrinkage sleeve are not coated with glue, the heat shrinkage sleeve is cooled and shaped in cooling pool by worker after coating glue is completed, and can be used for batch production of two ends without glue.

Description

Technical Field

[0001] This invention relates to the field of heat shrink sleeve technology, and in particular to an apparatus and method for coating heat shrink sleeves with adhesive. Background Technology

[0002] For safe gas use, my country stipulates that low-pressure pipelines must be made of steel for installation in homes, while high-pressure plastic pipelines must be made of steel. These connections typically use heat-shrinkable sleeves for corrosion protection to further improve safety and lifespan.

[0003] During the installation of existing heat shrink sleeves, the hot melt adhesive at both ends of the sleeve tube bulges out due to the longitudinal shrinkage of the sleeve, affecting the quality of the joint. Currently, the common practice is to leave the ends uncoated to prevent the hot melt adhesive from bulging out. However, due to the viscosity and fluidity of the hot melt adhesive, coupled with internal pressure, even after the glue pump motor stops, the hot melt adhesive will still flow out of the glue applicator, which is very difficult to control and makes it impossible to mass-produce heat shrink sleeves with uncoated ends. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an apparatus and method for coating heat shrink sleeves.

[0005] The objective of this invention is achieved through the following technical solution: a device for coating heat shrink sleeves, comprising a frame, a glue supply pipe disposed above the frame, the inlet end of the glue supply pipe being connected to an existing glue supply device, a glue applicator disposed at the outlet end of the glue supply pipe, an adjustment mechanism disposed on the frame, the adjustment mechanism being used to control the coating area of ​​the heat shrink sleeve by the glue supply pipe, and a cooling pool disposed on one side of the frame.

[0006] Preferably, the glue applicator includes a feed cylinder, the outlet end of the glue supply tube is connected to the feed cylinder, the outlet end of the feed cylinder is provided with a distributor for dispensing glue, the outer wall of the distributor is provided with a groove, and a glue baffle is also provided on the distributor.

[0007] Preferably, the diverter includes a diverting cone and a mounting rod. The diverting cone is located inside the feed cylinder, and the mounting rod is connected to the bottom surface of the diverting cone. The mounting rod is located outside the feed cylinder, and a baffle plate is also installed on the mounting rod. A locking nut is threaded to the end of the mounting rod. There is a glue outlet channel between the baffle plate and the bottom surface of the diverting cone. Several glue outlet holes are equally spaced on the bottom surface of the diverting cone, and there is a cavity a between the side wall of the diverting cone and the inner wall of the feed cylinder.

[0008] Preferably, the adjustment mechanism includes a movable base, a track is provided on the upper surface of the frame, rollers under the movable base roll on the track, a mounting frame is vertically mounted on the upper surface of the movable base, and a reinforcing piece b is provided at the connection between the movable base and the mounting frame. A through hole is opened in the middle of the mounting frame, and several expansion mechanisms are mounted on the side of the mounting frame, and the expansion mechanisms are located on the same circumference. The expansion piece on the expansion mechanism is located in the through hole, the glue supply tube is located inside the expansion piece, and there is a cavity between the expansion piece and the through hole for accommodating the port of the heat shrink sleeve.

[0009] Preferably, there are six expansion mechanisms, each including a cylinder, a mounting plate, a connecting plate, and a receiving plate. The cylinder is mounted on the side of the mounting frame, and the piston rod on the cylinder is connected to the mounting plate. The connecting plate is mounted on the side of the mounting plate, and the receiving plate is mounted on the upper surface of the connecting plate. The expansion plate is vertically mounted on the end of the receiving plate.

[0010] Preferably, the connecting plate is vertically installed at the lower end of the side of the mounting plate, and a reinforcing plate is provided at the connection between the connecting plate and the mounting plate.

[0011] Preferably, the adjustment mechanism includes a drive mechanism and a baffle ring. A groove is provided on the outer wall of the diverter cone, and a baffle ring is provided in the groove. The baffle ring is located inside the baffle plate, and the drive mechanism is used to drive the baffle ring to move in the groove.

[0012] Preferably, the drive mechanism includes a first connecting plate, a cylinder b, and a first connecting rod. The first connecting plate has a through hole b, and the glue supply tube is located in the through hole b. A receiving plate b is installed on the first connecting plate. The cylinder b is installed on the frame, and the piston rod b on the cylinder b is connected to the receiving plate b. There are two first connecting rods, which are distributed vertically. A limit groove is opened on the outer wall of the feed cylinder. One end of the first connecting rod passes through the limit groove and is connected to the glue-blocking ring. The other end of the first connecting rod is installed on the first connecting plate.

[0013] A method for coating heat shrink sleeves with adhesive further includes the following steps:

[0014] S1.1: Place the port of the heat shrink sleeve into the cavity. After it is in place, start the expansion mechanism. The expansion mechanism drives the expansion piece to move towards the outside of the through hole, reducing the cavity area and expanding the port of the heat shrink sleeve.

[0015] S1.2: After expansion is completed, the staff pushes the moving seat to move, and at the same time, the hot melt adhesive in the supply tube is diverted through the diversion cone and then supplied through cavity a and the glue outlet channel to cover the inner wall of the heat shrink sleeve with adhesive.

[0016] S1.3: When the applicator head reaches the other end of the heat shrink sleeve, the operator pushes the moving seat in the opposite direction to remove the heat shrink sleeve.

[0017] A method for coating heat shrink sleeves with adhesive further includes the following steps:

[0018] S2.1: Place the heat shrink sleeve onto the glue supply tube;

[0019] S2.2: When the glue applicator is located at the end of the heat shrink sleeve, the drive mechanism moves the glue-blocking ring closer to the glue-blocking plate, so that the glue-blocking ring fits against the glue-blocking plate and closes the glue outlet channel. When the glue applicator is in other positions, the glue outlet channel is opened to supply glue and coat the inner wall of the heat shrink sleeve with glue.

[0020] The present invention has the following advantages: The present invention controls the glue-coating area of ​​the heat shrink sleeve by adjusting the glue supply tube, so that the two ends of the heat shrink sleeve are not glued. After the glue is applied, the workers put the heat shrink sleeve into the cooling pool to cool and shape it. It can be used for mass production of heat shrink sleeves with no glue at both ends. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1;

[0022] Figure 2 This is a schematic diagram of the expansion mechanism;

[0023] Figure 3 A structural schematic diagram of the expansion mechanism from another perspective;

[0024] Figure 4 A structural diagram showing the positional relationship between the drive mechanism and the retaining ring;

[0025] Figure 5 A schematic diagram showing the positional relationship between the drive mechanism and the retaining ring from another perspective;

[0026] Figure 6 This is a schematic diagram of the adhesive applicator.

[0027] Figure 7 A cross-sectional structural diagram of the glue applicator head;

[0028] In the diagram, 1-mounting bracket, 2-expansion mechanism, 3-cylinder, 4-piston rod, 5-mounting plate, 6-connecting plate, 7-reinforcing plate, 8-receiving plate, 9-through hole, 10-heat shrink sleeve, 11-expansion plate, 12-cavity, 100-supply tube, 101-first connecting plate, 102-piston rod b, 103-receiving plate b, 104-cylinder b, 105-drive mechanism, 106-first connecting rod, 107-feed cylinder, 10 8-Diverter, 109-Glue-blocking ring, 110-Glue-blocking plate, 111-Locking nut, 112-Mounting rod, 113-Through hole b, 114-Limiting groove, 115-Glue outlet hole, 116-Cavity a, 117-Diverter cone, 118-Groove, 119-Glue outlet channel, 200-Frame, 201-Cooling pool, 202-Railway, 203-Roller, 204-Moving seat, 205-Reinforcing plate b, 206-Glue applicator head. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the 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 invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0032] 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.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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 invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] In this embodiment, a device for applying adhesive to heat shrink sleeves includes a frame 200. A glue supply pipe 100 is positioned above the frame 200. The inlet end of the glue supply pipe 100 is connected to existing glue supply equipment, and the outlet end of the glue supply pipe 100 is equipped with a glue applicator 206. An adjustment mechanism is provided on the frame 200 to control the glue application area of ​​the glue supply pipe 100 to the heat shrink sleeve 10. A cooling tank 201 is provided on one side of the frame 200. By adjusting the glue supply pipe 100 to control the glue application area of ​​the heat shrink sleeve 10, the two ends of the heat shrink sleeve 10 are left uncoated. After glue application, the heat shrink sleeve 10 is placed in the cooling tank 201 by the operator to cool, enabling mass production of heat shrink sleeves 10 with uncoated ends.

[0036] Furthermore, such as Figure 6 and Figure 7As shown, the glue applicator 206 includes a feed cylinder 107, the discharge end of the glue supply pipe 100 is connected to the feed cylinder 107, the discharge end of the feed cylinder 107 is provided with a distributor 108 for dispensing glue, the outer wall of the distributor 108 is provided with a groove 118, and the distributor 108 is also provided with a glue baffle 110. Furthermore, the diverter 108 includes a diverting cone 117 and a mounting rod 112. The diverting cone 117 is located inside the feed cylinder 107. The bottom surface of the diverting cone 117 is connected to the mounting rod 112. The mounting rod 112 is located outside the feed cylinder 107. A baffle plate 110 is also installed on the mounting rod 112, and a locking nut 111 is threaded to the end of the mounting rod 112. There is a glue outlet channel 119 between the baffle plate 110 and the bottom surface of the diverting cone 117. Several glue outlet holes 115 are equally spaced on the bottom surface of the diverting cone 117, and there is a cavity a116 between the side wall of the diverting cone 117 and the inner wall of the feed cylinder 107. Specifically, when glue supply is required, i.e., when the glue applicator 206 is located in the middle of the heat shrink sleeve 10, the existing glue supply equipment (not shown in the figure) pumps hot melt glue into the glue supply pipe 100. After being diverted by the diversion cone 117, the glue is supplied through the cavity a116, the glue outlet 115 and the glue outlet channel 119, thereby covering the inner wall of the heat shrink sleeve 10 with glue. The main function of the glue baffle 110 is to change the direction of the hot melt glue after it flows out of the glue outlet 115, so that it flows out through the glue outlet channel 119.

[0037] There are two embodiments of the adjustment mechanism, which will be described in detail below.

[0038] Example 1:

[0039] like Figure 1 As shown, the adjustment mechanism includes a movable seat 204, a track 202 is provided on the upper surface of the frame 200, a roller 203 below the movable seat 204 rolls on the track 202, a mounting frame 1 is vertically mounted on the upper surface of the movable seat 201, and a reinforcing piece b205 is provided at the connection between the movable seat 204 and the mounting frame 1. A through hole 9 is opened in the middle of the mounting frame 1, and several expansion mechanisms 2 are installed on the side of the mounting frame 1, and the expansion mechanisms 2 are located on the same circumference. The expansion piece 11 on the expansion mechanism 2 is located in the through hole 9, and the glue supply tube 100 is located inside the expansion piece 11. There is a cavity 12 between the expansion piece 11 and the through hole 9, and the cavity 12 is used to accommodate the port of the heat shrink sleeve 10.

[0040] A method for coating heat shrink sleeves involves placing the port of the heat shrink sleeve 10 into the cavity 12. After placement, the expansion mechanism 2 is activated, which drives the expansion piece 11 to move towards the outer end of the through hole 9, reducing the area of ​​the cavity 12 and expanding the port of the heat shrink sleeve 10.

[0041] S1.2: After expansion is completed, the staff pushes the moving seat 204 to move, and at the same time, the hot melt adhesive in the glue supply tube 100 is diverted by the diversion cone 117 and then supplied through the cavity a116 and the glue outlet channel 119 to cover the inner wall of the heat shrink sleeve 10 with glue.

[0042] S1.3: When the glue applicator 206 reaches the other end of the heat shrink sleeve 10, the operator pushes the moving seat 204 in the opposite direction to roll and remove the heat shrink sleeve 10. Specifically, since the diameter of the expanded end is larger than the diameter of the heat shrink sleeve 10, when applying glue to the inner wall of the heat shrink sleeve 10, the expanded end will not be glued. When the glue applicator 206 reaches the other end of the heat shrink sleeve 10, the operator pushes the moving seat 204 in the opposite direction to reset, so that the other end is not glued either. This facilitates the mass production of heat shrink sleeves 10 without glue at both ends. Since the ends of the heat shrink sleeve 10 are elastically expanded, the expanded ends will gradually return to their original size, i.e., the diameter of the heat shrink sleeve 10 itself.

[0043] Furthermore, such as Figure 2 and Figure 3 As shown, the expansion mechanism 2 has six components, including a cylinder 3, a mounting plate 5, a connecting plate 6, and a receiving plate 8. The cylinder 3 is mounted on the side of the mounting frame 1, and the piston rod 4 on the cylinder 3 is connected to the mounting plate 5. The connecting plate 6 is mounted on the side of the mounting plate 5, and the receiving plate 8 is mounted on the upper surface of the connecting plate 6. The expansion piece 11 is vertically mounted on the end of the receiving plate 8. Specifically, the operator places the port of the heat shrink sleeve 10 into the cavity 12. When its end abuts against the receiving plate 8, it indicates that the port of the heat shrink sleeve 10 is in place. This limits the expansion distance of the port, facilitating subsequent installation and use. After placement, the cylinder 3 is activated, causing the piston rod 4 to contract, thereby moving the mounting plate 5 towards the outer end of the mounting frame 1, and further moving the expansion piece 11 towards the outer end of the through hole 9, reducing the area of ​​the cavity 12 and expanding the port of the heat shrink sleeve 10. After expansion, the cylinder 3 drives the piston rod 4 to contract, thereby moving the mounting plate 5 towards the outer end of the mounting frame 1, and further moving the expansion piece 11 towards the outer end of the through hole 9, reducing the area of ​​the cavity 12 and expanding the port of the heat shrink sleeve 10. After expansion, the cylinder 3 drives the piston rod 4 to retract. Rod 4 is reset, thereby resetting the expansion piece 11. At the same time, the operator pushes the moving seat 204 to move, and the hot melt adhesive in the glue supply tube 100 is diverted by the diversion cone 117 and then supplied through the cavity a116 and the glue outlet channel 119 to coat the inner wall of the heat shrink sleeve 10. When the glue application head 206 reaches the other end of the heat shrink sleeve 10, the operator pushes the moving seat 204 in the opposite direction to reset, so that the two ends of the heat shrink sleeve 10 are not coated with glue. After resetting, the operator takes out the heat shrink sleeve 10 and puts it into the cooling pool 201 to cool.

[0044] Furthermore, the connecting plate 6 is vertically installed at the lower end of the side of the mounting plate 5, and a reinforcing piece 7 is provided at the connection between the connecting plate 6 and the mounting plate 5. Specifically, the reinforcing piece 7 is a right-angled triangle, and its two right-angled sides are connected to the connecting plate 6 and the mounting plate 5 respectively. Since triangles are stable, the main function of the reinforcing piece 7 is to strengthen the connection between the connecting plate 6 and the mounting plate 5.

[0045] Example 2:

[0046] In this embodiment, as Figure 4 and Figure 5 As shown, the adjustment mechanism includes a drive mechanism 105 and a baffle ring 109. A groove 118 is provided on the outer wall of the diverter cone 117, and a baffle ring 109 is provided in the groove 118. The baffle ring 109 is located inside the baffle plate 110. The drive mechanism 105 is used to drive the baffle ring 109 to move in the groove 118.

[0047] A method for coating heat shrink sleeves with adhesive further includes the following steps:

[0048] S2.1: Place the heat shrink sleeve 10 onto the glue supply tube 100;

[0049] S2.2: When the glue applicator 206 is located at the end of the heat shrink sleeve 10, the drive mechanism drives the glue-blocking ring 109 to move closer to the glue-blocking plate 110, so that the glue-blocking ring 109 fits against the glue-blocking plate 110 and closes the glue outlet channel 119. When the glue applicator 206 is in other positions, the glue outlet channel 119 is opened to supply glue and coat the inner wall of the heat shrink sleeve 10 with glue.

[0050] Furthermore, the drive mechanism 105 includes a first connecting plate 101, a cylinder b104, and a first connecting rod 106. The first connecting plate 101 has a through hole b113, and the glue supply pipe 100 is located in the through hole b113. A receiving plate b103 is installed on the first connecting plate 101. The cylinder b104 is installed on the frame 200. The piston rod b102 on the cylinder b104 is connected to the receiving plate b103. There are two first connecting rods 106, and the first connecting rods 106 are distributed vertically. A limiting groove 114 is opened on the outer wall of the feed cylinder 107. One end of the first connecting rod 106 passes through the limiting groove 114 and is connected to the glue-blocking ring 109. The main function of the limiting groove 114 is to provide a positioning reference for the glue-blocking ring 109 during installation. The other end of the first connecting rod 106 is installed on the first connecting plate 101. Specifically, when the applicator head 206 is located at the end of the heat shrink sleeve 10, the piston rod b102 on the cylinder b104 retracts, thereby driving the glue-blocking ring 109 to move closer to the glue-blocking plate 110, so that it abuts against the side of the glue-blocking plate 110, thereby closing the glue outlet channel 119 and stopping the glue supply. When the applicator head 206 is located in the middle of the heat shrink sleeve 10, the piston rod b102 on the cylinder b104 extends, driving the glue-blocking ring 109 away from the glue-blocking plate 110, so that the hot melt glue in the glue supply tube 100 is diverted by the diverting cone 117 and then supplied through the cavity a116, the glue outlet hole 115 and the glue outlet channel 119, so that the applicator head 206 coats the inner wall of the heat shrink sleeve 10 with glue. In other words, the glue-blocking ring 109 is equivalent to the function of a switch.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, 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, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for applying adhesive to heat shrink sleeves, characterized in that: The device includes a frame (200), above which is a glue supply pipe (100). The inlet end of the glue supply pipe (100) is connected to an existing glue supply device. The outlet end of the glue supply pipe (100) is equipped with a glue applicator (206). An adjustment mechanism is provided on the frame (200) to control the glue application area of ​​the glue supply pipe (100) to the heat shrink sleeve (10). A cooling pool (201) is provided on one side of the frame (200). The glue applicator (206) includes a feed cylinder (107), the discharge end of the glue supply pipe (100) is connected to the feed cylinder (107), the discharge end of the feed cylinder (107) is provided with a flow divider (108) for discharging glue, the outer wall of the flow divider (108) is provided with a groove (118), and the flow divider (108) is also provided with a glue baffle (110). The diverter (108) includes a diverting cone (117) and a mounting rod (112). The diverting cone (117) is located inside the feed cylinder (107). The bottom surface of the diverting cone (117) is connected to the mounting rod (112). The mounting rod (112) is located outside the feed cylinder (107). The mounting rod (112) is also equipped with a baffle plate (110). The end of the mounting rod (112) is threaded with a locking nut (111). There is a glue outlet channel (119) between the baffle plate (110) and the bottom surface of the diverting cone (117). The bottom surface of the diverting cone (117) is provided with several glue outlet holes (115) at equal intervals. There is a cavity a (116) between the side wall of the diverting cone (117) and the inner wall of the feed cylinder (107). The adjustment mechanism includes a drive mechanism (105) and a baffle ring (109). A groove (118) is provided on the outer wall of the diverter cone (117). The baffle ring (109) is provided in the groove (118) and is located inside the baffle plate (110). The drive mechanism (105) is used to drive the baffle ring (109) to move in the groove (118). The drive mechanism (105) includes a first connecting plate (101), a cylinder b (104) and a first connecting rod (106). The first connecting plate (101) has a through hole b (113), and the glue supply pipe (100) is located in the through hole b (113). The first connecting plate (101) has a receiving plate b (103) installed on it. The cylinder b (104) is installed on the frame (200). The piston rod b (102) on the cylinder b (104) is connected to the receiving plate b (103). There are two first connecting rods (106), and the first connecting rods (106) are distributed vertically. The outer wall of the feed cylinder (107) has a limiting groove (114). One end of the first connecting rod (106) passes through the limiting groove (114) and is connected to the glue-blocking ring (109). The other end of the first connecting rod (106) is installed on the first connecting plate (101).

2. A method for applying adhesive to heat shrink sleeves, comprising the adhesive application apparatus for heat shrink sleeves as described in claim 1, characterized in that: It also includes the following steps: S2.1: Place the heat shrink sleeve (10) onto the glue supply tube (100); S2.2: When the glue applicator (206) is located at the end of the heat shrink sleeve (10), the drive mechanism drives the glue-blocking ring (109) to move closer to the glue-blocking plate (110), so that the glue-blocking ring (109) fits against the glue-blocking plate (110) and closes the glue outlet channel (119). When the glue applicator (206) is in other positions, the glue outlet channel (119) is opened to supply glue and coat the inner wall of the heat shrink sleeve (10) with glue.

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