High-speed paper bag bottom gluing device

Abstract

The invention relates to an accessory device of a paper bag machine, and discloses a high-speed paper bag bottom gluing device. The glue applying device comprises a glue applying shaft, a glue spraying roller and a plurality of glue spraying heads, the glue applying shaft is provided with a glue inlet pipeline, the glue spraying roller is installed on the glue applying shaft in a sealed mode, an annular cavity capable of enabling glue to enter from the glue inlet pipeline is formed between the glue spraying roller and the glue applying shaft, and glue outlet holes located in the annular cavity are formed in the glue applying shaft. The glue spraying head comprises a valve seat, a valve element, a compression spring and a sealing ring, the upper end of the valve element can stretch out of a glue outlet formed in the top of the valve seat, the glue outlet can be sealed through the sealing ring under the action of the compression spring, and the glue spraying head can enable the valve element to overcome spring force to leave the glue outlet to discharge glue in the glue applying process. According to the device, more than 500 paper bags can run at a high speed per minute, glue is not thrown, the bottoms of the paper bags are stably and automatically coated with the glue, folding and forming of the paper bags are facilitated, the glue coating quality is guaranteed, continuous and automatic production can be achieved, and the efficiency problem of a paper bag machine is solved.

Description

Technical Field

[0001] The invention relates to an auxiliary device of a paper bag machine, in particular to a high-speed paper bag bottom gluing device. Background Art

[0002] Nowadays, paper bags have been produced automatically, including folding the edges into tubes, creasing the bottom of the bag, applying the bottom glue, folding the bottom of the bag, and collecting. For the process of applying the bottom glue of the bag, the traditional bottom glue of the bag is applied by the matching structure of the sizing plate and the glue roller. The gluing position of the paper bag is as follows: Figure 1 The trajectory of point A of the paper bag with a square bottom and a pointed end Figure 2 The position shown by the trajectory of point B of the paper bag with a square bottom is that the existing transmission gluing system can avoid glue throwing when the running speed is slow. However, when the speed reaches more than 250 per minute, the glue will be thrown out, splashing onto the paper bag machine, causing paper bag clogging and easily damaging the machine, and cannot be continuously produced. Over time, it will inevitably affect the normal operation of the machine, and the glue coating quality is also difficult to guarantee. Therefore, general equipment can only be opened at about 200 per minute, which will seriously affect the speed of paper bags and greatly reduce the production efficiency of the paper bag machine. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-speed paper bag bottom gluing device which can realize high-speed bag making by a paper bag machine, does not throw away glue, can automatically and continuously operate, and ensures the gluing quality and efficiency.

[0004] In order to solve the above technical problems, the present invention provides a high-speed paper bag bottom gluing device, comprising a gluing shaft, a glue spraying roller, and a plurality of glue spraying heads. The gluing shaft has a glue inlet pipe, which is opened from one end of the gluing shaft and extends to the middle of the gluing shaft. The glue spraying roller is sleeved on the gluing shaft, and the plurality of glue spraying heads are arranged around the gluing roller. The glue spraying roller is sealed on the gluing shaft and an annular cavity is formed between the glue spraying roller and the gluing shaft, through which glue can enter from the glue inlet pipe. The gluing shaft is provided with a glue outlet hole located in the annular cavity. After passing through a rotary joint, the glue enters the annular cavity from the glue inlet pipe through the glue outlet hole.

[0005] The glue spray head includes a valve seat, a valve core, a compression spring and a sealing ring. The upper end of the valve core can extend from the glue outlet set on the top of the valve seat and can use the sealing ring to close the glue outlet under the action of the compression spring. During the glue application process, the glue spray head can enable the valve core to overcome the spring force to open the glue outlet to discharge glue.

[0006] Furthermore, the valve seat is mounted on the glue spraying roller, the valve core is placed in the valve seat, the compression spring is pressed against the bottom of the valve core, the sealing ring is placed at the glue outlet of the valve seat, the valve core includes a cylindrical body and a valve head with a spherical surface, the cylindrical body is connected to the valve head through a neck, and the sealing ring is sleeved on the neck to seal the glue outlet;

[0007] The glue-applying shaft is driven to rotate by gears, so that the glue-spraying roller rotates synchronously and presses into the valve core. Glue flows out of the valve core and is coated on the paper bag. One paper bag is coated after one rotation. The valve core leaves the force-bearing surface and resets under the action of the compression spring, thereby shutting off the glue.

[0008] Furthermore, the glue spraying roller is provided with a mounting groove which is connected to the annular cavity through a radial hole, the valve seat is screwed into the mounting groove, a limiting groove is provided on the rear end face of the columnar body, and the compression spring is limited in the limiting groove.

[0009] Furthermore, the valve head is a hemispherical structure, and the outer diameter of the valve head is adapted to the inner hole diameter of the glue outlet.

[0010] Furthermore, the glue spraying roller is installed in the middle of the glue application shaft, and the glue application shaft is covered with two locking sleeves located at both ends of the glue spraying roller. The glue spraying roller is fixedly installed outside the glue application shaft through the locking sleeves, and washers are respectively placed between the two locking sleeves and the two ends of the glue spraying roller.

[0011] Furthermore, the valve seat is threadedly connected to the glue spraying roller, and the heights of the valve heads of the plurality of glue spraying heads are kept consistent.

[0012] Furthermore, the glue application shaft is connected to the glue application pressure tank via a rotary joint.

[0013] Furthermore, the glue pressure tank includes a tank body, an air pipeline and a glue outlet pipeline. The tank body adopts a cylindrical structure and is used to hold glue. The air pipeline is connected to the tank body and is used to inject compressed air into the tank body. The glue outlet pipeline extends into the tank body and is used to output the glue in the tank body. The rotary joint is installed at the top of the glue outlet pipeline. A glue injection hole is also provided on the top of the tank body.

[0014] Furthermore, a pressure regulating valve, a pressure gauge and a gas circuit switch are installed on the gas pipeline, and a pressure relief valve is also provided on the tank body.

[0015] Furthermore, the glue outlet pipeline includes a glue hard pipe extending into the tank body and a glue hose connected to the glue hard pipe and located outside the tank body. The glue hard pipe is equipped with a glue switch located outside the tank body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By setting up mutually coordinated glue spraying rollers and glue application shafts and multiple glue spraying heads with pressure-contact structures arranged on the periphery of the glue spraying rollers, the valve core can overcome the spring force to open the glue outlet to discharge glue during the glue application process. After the glue application is completed, the upper end of the valve core can extend from the glue outlet set on the top of the valve seat and the glue outlet is closed by a sealing ring under the action of the compression spring, thereby achieving high-speed operation of more than 500 per minute, without throwing away glue, and smoothly and automatically applying glue to the bottom of the paper bag, which is convenient for folding and forming the paper bag, thereby ensuring the quality of glue application, and enabling continuous automatic production, thus solving the problem of paper bag machine efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a paper bag with a square bottom and a pointed tip;

[0019] Figure 2 This is a schematic diagram of the structure of a square bottom paper bag;

[0020] Figure 3 This is a schematic structural diagram of a high-speed paper bag bottom gluing device according to the present invention;

[0021] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure;

[0022] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at C;

[0023] Figure 6 It is a structural schematic diagram of the glue application pressure tank in the present invention;

[0024] Figure 7 This is a side structural schematic diagram of the installation state of the high-speed paper bag bottom gluing device of the present invention. DETAILED DESCRIPTION

[0025] The high-speed paper bag bottom gluing device of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 3 to 7As shown, the high-speed paper bag bottom gluing device of the present invention includes a gluing shaft 2 with a glue inlet pipeline 1, a glue spraying roller 3 sleeved on the gluing shaft, and a plurality of glue spraying heads 4 arranged on the periphery of the glue spraying roller. Several glue spraying heads 4 with different arrangements can be designed according to the specifications of the paper bags. The glue spraying roller 3 is sealed on the gluing shaft and an annular cavity 5 is provided between the glue spraying roller and the gluing shaft, through which glue can enter from the glue inlet pipeline 1. The gluing shaft 2 is provided with a glue outlet hole 17 located in the annular cavity, thereby allowing glue to pass through the rotary joint, then from the glue inlet pipeline 1, through the glue outlet hole 17, and then into the annular cavity 5.

[0027] Specifically, the glue spray head 4 includes a valve seat 6 mounted on the glue spray roller, a valve core 7 placed in the valve seat, a compression spring 8 pressed against the bottom of the valve core, and a sealing ring 9 placed at the glue outlet of the valve seat. The upper end of the valve core 7 can extend from the glue outlet set at the top of the valve seat and can be sealed by the sealing ring 9 under the action of the compression spring. During the glue application process, the glue spray head 4 can enable the valve core to overcome the spring force and open the glue outlet to discharge glue. Through this structural design, the valve core 7 and compression spring 8 are placed in the valve seat 6, and the glue application shaft 2 is driven to rotate by gears, so that the glue spray roller rotates synchronously, pressing the valve core 7, and glue flows out of the valve core 7 and is applied to the paper bag. One rotation coats one paper bag. The valve core leaves the force-bearing surface (drum) and resets under the action of the compression spring 8, closing the glue. The glue is quickly released without being thrown out.

[0028] Specifically by Figure 4 It can be seen that the glue inlet pipeline 1 is opened from one end of the gluing shaft and extends to the middle of the gluing shaft. The glue spraying roller 3 is installed in the middle of the gluing shaft. The gluing shaft 2 is covered with two locking sleeves 15 located at both ends of the glue spraying roller 3. Washers 16 are respectively arranged between the two locking sleeves 15 and the two ends of the glue spraying roller 3. The glue spraying roller 3 is fixedly installed on the outside of the glue applying shaft through the locking sleeves and the two washers 16. That is to say, the glue spraying roller 3 is installed on the glue applying shaft, and the two ends are fixed with locking sleeves 15 respectively. The middle of the glue spraying roller 3 is empty, and washers 16 are respectively installed at both ends.

[0029] Furthermore, in this embodiment, a mounting groove 13 is arranged on the glue spraying roller 3, which is connected to the annular cavity through a radial hole 27, and the valve seat 6 is screwed into the mounting groove. The valve core 7 includes a cylindrical body 10 and a valve head 12 with a spherical surface connected by a neck 11.

[0030] Specifically by Figure 5 It can be seen that the valve head 12 is a hemispherical structure, the outer diameter of the valve head is adapted to the inner diameter of the glue outlet, the sealing ring 9 is sleeved on the neck to seal the glue outlet, the height of the valve heads of several glue spray heads must be consistent, the valve seat 6 is connected to the glue spray roller 3 with a thread, and the valve head of each glue spray head can be adjusted to make their height consistent. A limiting groove 14 is provided on the rear end face of the columnar body 10, and the compression spring 8 is limited in the limiting groove.

[0031] Further, by Figure 6 It can be seen that the glue application shaft 2 of this embodiment is connected to the glue application pressure tank through a rotary joint 18. The glue application pressure tank includes a tank body 19, an air line 20 connected to the tank body for injecting compressed air into the tank body, and a glue outlet line 21 extending into the tank body for outputting the glue in the tank body. The tank body 19 contains glue. The tank body 19 is designed to be cylindrical. A glue injection hole 22 is also provided on the top of the tank body 19. The glue injection hole 22 is sealed and closed during operation. A pressure regulating valve 23, a pressure gauge, an air line switch 102, etc. are installed on the air line 20. A pressure relief valve 24 is also provided on the tank body 19. The rotary joint 18 is installed on the top of the glue outlet line. The glue outlet line 2 1 includes a glue hard pipe 25 extending into the tank body and a glue hose 26 connected to the glue hard pipe 25 and located outside the tank body. Compressed air is connected to the glue hard pipe 25, and glue is added to 2 / 3 of the height of the tank body 19. The glue hard pipe 25 is inserted into the bottom of the tank body 19. A glue switch 27 located outside the tank body is installed on the glue hard pipe 25. The rotary joint 18 is connected to the glue application shaft at one end and connected to the glue switch 27 at the other end through the glue hose 26. When the tank body 19 is pressurized, the compressed air above the tank body 19 presses the glue out of the glue hard pipe 25 at the bottom and sends it to the glue application shaft through the rotary joint 18. The pressure is controlled by the pressure regulating valve to ensure that the pressure of the tank body 19 is constant.

Claims

1. A high-speed paper bag bottom gluing device, characterized by: The invention comprises a glue application shaft (2), a glue spraying roller (3) and a plurality of glue spraying heads (4), wherein the glue application shaft (2) has a glue inlet pipe (1), the glue inlet pipe (1) is opened from one end of the glue application shaft (2) and extends to the middle of the glue application shaft (2), the glue spraying roller (3) is sleeved on the glue application shaft (2), and the plurality of glue spraying heads (4) are arranged on the periphery of the glue spraying roller (3), the glue spraying roller (3) is sealed and mounted on the glue application shaft (2), and an annular cavity (5) is provided between the glue spraying roller (3) and the glue application shaft (2), which is capable of allowing glue to enter from the glue inlet pipe (1), and the glue application shaft (2) is provided with a glue outlet hole (17) located in the annular cavity (5), and the glue passes through a rotary joint (18), enters the annular cavity (5) from the glue inlet pipe (1) through the glue outlet hole (17); The glue spray head (4) comprises a valve seat (6), a valve core (7), a compression spring (8) and a sealing ring (9); the upper end of the valve core (7) can extend from a glue outlet provided on the top of the valve seat (6) and can close the glue outlet using the sealing ring (9) under the action of the compression spring (8); and the glue spray head (4) can enable the valve core (7) to overcome the spring force and allow the glue outlet to discharge glue during the glue application process.

2. The high-speed paper bag bottom gluing device according to claim 1, characterized in that: The valve seat (6) is mounted on the glue spraying roller (3), the valve core (7) is placed in the valve seat (6), the compression spring (8) is pressed against the bottom of the valve core (7), the sealing ring (9) is placed at the glue outlet of the valve seat (6), the valve core (7) comprises a columnar body (10) and a valve head (12) with a spherical surface, the columnar body (10) is connected to the valve head (12) through a neck (11), and the sealing ring (9) is sleeved on the neck (11) to seal the glue outlet; The glue-applying shaft (2) is driven to rotate by a gear, so that the glue-spraying roller (3) rotates synchronously and presses into the valve core (7). Glue flows out of the valve core (7) and is applied to the paper bag. One rotation coats one paper bag. The valve core (7) leaves the force-bearing surface and resets under the action of the compression spring (8), thereby closing the glue.

3. The high-speed paper bag bottom gluing device according to claim 2, characterized in that: The glue spraying roller (3) is provided with a mounting groove (13) which communicates with the annular cavity (5) through a radial hole. The valve seat (6) is screwed into the mounting groove (13). A limiting groove (14) is provided on the rear end face of the columnar body (10), and the compression spring (8) is limited in the limiting groove.

4. The high-speed paper bag bottom gluing device according to claim 3, characterized in that: The valve head (12) is a hemispherical structure, and the outer diameter of the valve head (12) is adapted to the inner hole diameter of the glue outlet.

5. The high-speed paper bag bottom gluing device according to any one of claims 1 to 4, characterized in that: The glue spraying roller (3) is mounted on the middle portion of the glue application shaft (2); the glue application shaft (2) is sleeved with two locking sleeves (15) located at both ends of the glue spraying roller (3); the glue spraying roller (3) is fixedly mounted on the outside of the glue application shaft through the locking sleeves; washers (16) are respectively arranged between the two locking sleeves (15) and the two ends of the glue spraying roller (3).

6. The high-speed paper bag bottom gluing device according to claim 4, characterized in that: The valve seat (6) is threadedly connected to the glue spraying roller (3), and the heights of the valve heads (12) of the plurality of glue spraying heads (4) are kept consistent.

7. The high-speed paper bag bottom gluing device according to claim 5, characterized in that: The glue application shaft (2) is connected to the glue application pressure tank via a rotary joint (18).

8. The high-speed paper bag bottom gluing device according to claim 7, characterized in that: The glue pressure tank comprises a tank body (19), an air pipeline (20) and a glue outlet pipeline (21). The tank body (19) adopts a cylindrical structure and is used to contain glue. The air pipeline (20) is connected to the tank body (19) and is used to inject compressed air into the tank body (19). The glue outlet pipeline (21) extends into the tank body (19) and is used to output the glue in the tank body (19). The rotary joint (18) is installed at the top of the glue outlet pipeline (21). The top of the tank body (19) is also provided with a glue injection hole (22).

9. The high-speed paper bag bottom gluing device according to claim 8, characterized in that: A pressure regulating valve (23), a pressure gauge and a gas circuit switch are installed on the gas circuit pipeline (20), and a pressure relief valve (24) is also provided on the tank body (19).

10. The high-speed paper bag bottom gluing device according to claim 8 or 9, characterized in that: The glue outlet pipeline (21) includes a glue hard pipe (25) extending into the tank body (19) and a glue hose (26) connected to the glue hard pipe (25) and located outside the tank body (19); a glue switch (27) located outside the tank body (19) is installed on the glue hard pipe (25).

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