A gluing treatment device and method for leisure shoe production

Abstract

The present application relates to the technical field of leisure shoes production, in particular to a gluing treatment equipment and method for leisure shoes production, which comprises an equipment body, an extension pipe is fixedly installed at a glue outlet, and a preheating assembly is arranged outside the extension pipe. The present application is characterized in that a backflow cavity is arranged outside the pipe wall of the valve pipe body, a circulation cavity is arranged outside the lower end of the glue cavity, a sleeve pipe is arranged outside the extension pipe to form a preheating cavity, and an airflow driving mechanism is arranged in communication with the backflow cavity and the preheating cavity to form a closed gas circulation loop. When the high-temperature hot melt adhesive enters the glue cavity from the outside and is transported to the glue pipe, the gas heated by the heat of the glue absorbed by the pipe wall of the glue pipe is pumped out of the backflow cavity and then pumped to the bottom of the preheating cavity. The high-temperature gas flows upwards along the outer wall of the extension pipe in the preheating cavity, continuously preheats the extension pipe and the glue outlet at room temperature in the process, and forms a continuous gas preheating process.

Description

Technical Field

[0001] This invention relates to the field of casual shoe manufacturing technology, and more specifically, to a gluing treatment device and method for casual shoe manufacturing. Background Technology

[0002] In the production of casual shoes, gluing is one of the key processes. Its main function is to achieve reliable bonding between different parts such as the upper, sole, and upper. As the casual shoe market continues to expand, the industry's requirements for the efficiency and precision of production processes are constantly increasing. The stability of the gluing process has also become an important factor affecting production capacity and product quality.

[0003] In the existing technology, glue application on casual shoes is mostly done using a glue dispensing machine. A glue dispensing machine is a device that relies on automated control technology to achieve precise fluid delivery. It can control the glue dispensing volume, glue application path and operation rhythm according to preset parameters. Compared with manual glue application, it has advantages such as uniform glue application, high efficiency and less glue waste.

[0004] In the dispensing valve, the core component of a dispensing machine, a cylindrical tube is usually extended from the dispensing head to meet the glue application needs of different parts of casual shoes, enabling precise directional delivery of the glue. However, after the equipment is shut down, the extended tube remains in the ambient temperature environment of the workshop (usually 20-25℃). The hot melt adhesive used for applying glue to casual shoes needs to be maintained in the 120-180℃ range to ensure good fluidity. When the equipment is turned on for the first time to deliver hot melt adhesive, the high-temperature hot melt adhesive comes into direct contact with the low-temperature inner wall of the tube. Heat is quickly transferred to the cold tube wall, causing a sudden drop in temperature. This leads to a sharp increase in the viscosity of the hot melt adhesive. The hot melt adhesive, which was originally in a low-viscosity flow state, quickly turns into a viscous state due to heat loss. In severe cases, it can even form locally solidified glue lumps on the inner wall of the tube. Therefore, there is an urgent need for a glue application treatment equipment and method for casual shoe production to solve the above problems. Summary of the Invention

[0005] This invention provides a gluing treatment device and method for casual shoe production. It constructs a closed gas circulation loop and utilizes an airflow-driven mechanism to recover heat from the high-temperature glue inside the glue tube. This allows the circulating gas to simultaneously preheat the extension tube and glue outlet, completing the temperature rise before the glue arrives, ensuring smooth and stable glue dispensing during casual shoe gluing. This solves the problems mentioned in the background art, namely:

[0006] The extended cylindrical glue tube of the glue dispensing valve used for applying glue to casual shoes is at room temperature in the workshop after the machine is stopped. When the machine is turned on, the high-temperature hot melt glue comes into contact with the cold tube wall and loses temperature rapidly, causing the viscosity to rise sharply or even solidify in some areas, resulting in abnormal glue dispensing when the machine is turned on.

[0007] To achieve the above objectives, one objective of the present invention is to provide a gluing treatment device for casual shoe production, comprising a device body, wherein the device body is provided with a horizontal drive structure and a vertical drive structure for driving the valve tube body to move.

[0008] The valve tube body is provided with a glue cavity for supplying hot melt glue and a glue tube communicating with the glue cavity. The glue cavity is provided with a glue path control mechanism. A glue outlet is opened at the bottom of the valve tube body. An extension tube is fixedly installed at the glue outlet. A preheating component is sleeved on the outside of the extension tube.

[0009] The preheating assembly includes a sleeve fixed to the outside of the extension tube, forming a preheating cavity around the extension tube between the sleeve and the extension tube, a reflux cavity is formed around the outside of the tube wall of the hose, and a circulation cavity is formed around the lower end of the hose cavity.

[0010] The bottom of the preheating chamber is connected to the outlet of the airflow drive mechanism, which is located on the outer wall of the valve tube body. Its inlet is connected to the return chamber. When the equipment is started, the high-temperature adhesive flows through the tube, and its heat heats the gas in the return chamber through the tube wall. The airflow drive mechanism pumps the high-temperature gas formed by the heat to the bottom of the preheating chamber. The high-temperature gas rises in the preheating chamber and preheats the extension tube and the outlet. Then, it flows through the circulation chamber and the return chamber in sequence to recover the heat of the adhesive and realize continuous gas preheating circulation.

[0011] The above technical solution constructs a closed gas circulation preheating structure based on the heat recovery of the adhesive itself, which enables the high-temperature adhesive delivery and the preheating of the extension tube and the outlet to be synchronized. This reduces the problems of heat loss and abnormal viscosity of hot melt adhesive caused by cold pipes in the early stage of traditional equipment startup. It also improves the heat utilization efficiency and the continuity of equipment operation, thereby ensuring the precision and stability of the adhesive application process for casual shoes and meeting the high-efficiency operation requirements of large-scale production.

[0012] Based on this, the airflow drive mechanism includes an air intake branch pipe installed on the upper inner wall of the return chamber, an air supply branch pipe installed on the lower inner wall of the preheating chamber, the air supply branch pipe extending out of the surface of the sleeve, an air intake pipe sealed inside the air intake branch pipe, an air supply pipe sealed inside the air supply branch pipe, a pump body installed on the vertical drive structure via a bracket, and the other ends of the air intake pipe and the air supply pipe sealed to the air inlet and air outlet of the pump body, respectively.

[0013] The sealed connection design of the gas intake branch pipe and the gas supply branch pipe ensures the airtightness of the gas circulation loop, improves heat utilization efficiency and preheating effect. The gas intake branch pipe and the gas supply branch pipe correspond to the upper end of the return chamber and the lower end of the preheating chamber, respectively. With the directional connection of the gas intake pipe and the gas supply pipe, the high-temperature gas is directionally transported from the return chamber to the preheating chamber, ensuring the smoothness and continuity of gas circulation. This ensures that the extension pipe and glue outlet can be heated quickly and evenly, providing reliable structural support for the stable and efficient glue application process of casual shoes.

[0014] In addition, a liquid storage chamber is provided at the bottom of the sleeve, and a mesh plate is fixedly installed at the top opening of the liquid storage chamber. The liquid storage chamber is used to collect and store the moisture generated by the pre-condensation of gas in the sleeve. A drain valve that can be opened and closed is installed at the bottom of one side of the liquid storage chamber. The drain valve is used to periodically discharge condensate.

[0015] In this technical solution, the mesh plate can ensure smooth airflow in the preheating chamber and prevent impurities that may be carried in the airflow from entering the liquid storage chamber. The openable and closable drain valve enables convenient and periodic discharge of condensate, preventing water from accumulating in the liquid storage chamber and overflowing, thus contaminating the equipment or production environment and further enhancing the operational reliability of the preheating components.

[0016] The second objective of this invention is to provide a method for applying adhesive in the production of casual shoes, using the aforementioned adhesive application equipment for casual shoe production, and comprising the following steps:

[0017] S1. The device starts up and initializes the horizontal and vertical drive structures.

[0018] S2. The high-temperature adhesive is transported to the outlet through the hose. The heat of the adhesive heats the gas in the return chamber through the hose wall, forming high-temperature gas.

[0019] S3. Start the pump body to drive the gas in the gas circulation loop to start circulating; under the drive of the pump body, the high temperature gas enters the bottom of the preheating chamber through the gas supply pipe and gas supply branch pipe, and rises in the preheating chamber to preheat the extension pipe and the outlet.

[0020] S4. After preheating is completed, the hot melt adhesive is applied from the dispensing port by controlling the adhesive circuit control mechanism.

[0021] S5. The preheated gas continues to circulate, flowing sequentially through the circulation chamber and the return chamber to continuously recover the heat of the adhesive and maintain the preheating effect. The condensate generated during the circulation process is collected in the storage chamber by the mesh plate and discharged periodically through the drain valve.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] In this adhesive application equipment and method for casual shoe production, a reflux chamber is formed around the outside of the adhesive tube wall of the valve tube body, a circulation chamber is formed around the outside of the lower end of the adhesive chamber, and a sleeve forming a preheating chamber is fitted outside the extension tube. At the same time, an airflow drive mechanism connected to the reflux chamber and the preheating chamber is used to form a closed gas circulation loop. When high-temperature hot melt adhesive enters the adhesive chamber from the outside and is transported to the adhesive tube, the airflow drive mechanism is activated simultaneously to extract the gas in the reflux chamber that has been heated by absorbing the heat of the adhesive conducted by the adhesive tube wall. The gas is then pumped to the bottom of the preheating chamber. The high-temperature gas flows upward along the outer wall of the extension tube in the preheating chamber, continuously preheating the room-temperature extension tube and the adhesive outlet. After the gas flows through the top of the preheating chamber, it flows back to the reflux chamber through the circulation chamber to reabsorb the heat of the high-temperature adhesive in the adhesive tube and achieve a temperature increase, forming a continuous gas preheating process.

[0024] Throughout the process, the delivery of high-temperature adhesive and the preheating of gas circulation are carried out simultaneously, so that the extension tube completes the temperature rise before the adhesive reaches the outlet. This effectively reduces the heat loss caused by the contact between the high-temperature adhesive and the cold tube wall, realizes the recovery and utilization of heat, ensures the stable flow of adhesive in the early stage of start-up, and adapts to the continuous operation requirements of casual shoe production lines. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the installation structure of the valve tube body in this invention;

[0027] Figure 3 This is a schematic diagram of the flow structure of the adhesive liquid in this invention;

[0028] Figure 4 This is a diagram showing the internal flow structure of the adhesive liquid within the valve tube body in this invention;

[0029] Figure 5 This is a diagram showing the circulation structure of the high-temperature gas in the gas circulation loop of this invention;

[0030] Figure 6 This is a structural diagram of the upper part of the preheating component in this invention;

[0031] Figure 7 This is a structural diagram of the lower end of the preheating component in this invention;

[0032] Figure 8 This is a schematic diagram of the installation of the ribs in this invention;

[0033] Figure 9 For the present invention Figure 8 A schematic diagram of the structure at point A.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 1. Equipment body; 11. Horizontal drive structure; 12. Vertical drive structure; 13. Valve pipe body; 14. Preheating assembly; 15. Airflow drive mechanism;

[0036] 131. Extension tube; 132. Glue outlet; 133. Glue circuit control mechanism; 134. Glue hose; 135. Glue cavity;

[0037] 21. Sleeve; 22. Preheating chamber; 23. Reflux chamber; 24. Circulation chamber;

[0038] 151. Air intake pipe; 152. Pump body; 153. Air supply pipe; 154. Air intake branch pipe; 155. Air supply branch pipe;

[0039] 30. Ribs; 31. Liquid storage chamber; 32. Mesh plate; 33. Drain valve. Detailed Implementation

[0040] The technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1: Please refer to Figures 1-4 As shown, the purpose of this embodiment is to provide a gluing treatment device for casual shoe production, including a device body 1, on which a horizontal drive structure 11 and a vertical drive structure 12 for driving the valve tube body 13 to move are provided.

[0042] The valve tube body 13 is provided with a glue cavity 135 for supplying hot melt adhesive and a glue tube 134 connected to the glue cavity 135. The glue cavity 135 is provided with a glue path control mechanism 133. The bottom of the valve tube body 13 is provided with a glue outlet 132. An extension tube 131 is fixedly installed at the glue outlet 132. A preheating component 14 is sleeved on the outside of the extension tube 131 to realize the preheating of the extension tube 131 and reduce the heat loss of hot melt adhesive.

[0043] The preheating assembly 14 includes a sleeve 21 fixed to the outside of the extension tube 131. A preheating cavity 22 is formed between the sleeve 21 and the extension tube 131, surrounding the extension tube 131. A return cavity 23 is formed around the outside of the tube wall of the hose 134. A circulation cavity 24 is formed around the lower end of the cavity 135. The top of the preheating cavity 22 is connected to the circulation cavity 24, and the top of the circulation cavity 24 is connected to the return cavity 23. The preheating cavity 22, the circulation cavity 24, and the return cavity 23 together constitute a heat recovery channel to improve heat utilization efficiency.

[0044] The bottom of the preheating chamber 22 is connected to the outlet of the airflow drive mechanism 15. The airflow drive mechanism 15 is located on the outer wall of the valve tube body 13, and its inlet is connected to the return chamber 23 to drive the gas circulation flow and ensure the continuity of preheating.

[0045] When the equipment is started, the high-temperature adhesive flows through the adhesive tube 134. Its heat heats the gas in the return chamber 23 through the tube wall. The airflow drive mechanism 15 pumps the high-temperature gas generated by the heat to the bottom of the preheating chamber 22. The high-temperature gas rises in the preheating chamber 22 and preheats the extension tube 131 and the adhesive outlet 132. Then, it flows through the circulation chamber 24 and the return chamber 23 in sequence to recover the heat of the adhesive, realizing continuous gas preheating circulation and ensuring smooth and stable adhesive dispensing.

[0046] The valve body 13 described above operates with the assistance of a horizontal drive structure 11 and a vertical drive structure 12. Specifically, in combination with... Figure 1 As shown, the equipment body 1 serves as the load-bearing foundation. The horizontal drive structure 11 adopts a linear guide transmission structure with a ball screw driven by a servo motor. After the servo motor starts, it drives the ball screw to rotate. The nut that mates with the ball screw is fixed to the mounting plate of the vertical drive structure 12, converting the rotational motion of the screw into linear motion. At the same time, the mounting plate of the vertical drive structure 12 is fixed to the slider on the linear guide. The slider provides guidance and constraint along the guide, thereby driving the vertical drive structure 12 and the valve pipe body 13 connected to it to move along the horizontal direction of the equipment body 1. The valve tube body 13 is moved to a stable position to adjust its horizontal position so that it is aligned with the area of ​​the casual shoe to be glued. The vertical drive structure 12 also adopts a ball screw slide structure driven by a servo motor. The servo motor drives the corresponding ball screw to rotate, which drives the slide connected to the valve tube body 13 to move vertically up and down along the guide post. This adjusts the vertical distance between the glue outlet 132 of the valve tube body 13 and the area of ​​the casual shoe to be glued. Combined with the glue circuit on / off operation of the glue circuit control mechanism 133 inside the valve tube body 13, the glue application operation at the corresponding position is completed.

[0047] The working principle of the aforementioned glue path control mechanism 133 is well known to those skilled in the art. The glue path control mechanism 133 is located inside the glue cavity 135 and includes components such as a valve core and a return spring. When a glue application command is received, an external power source applies a force to the valve core, causing the valve core to overcome the elastic force of the return spring and move towards the bottom of the glue cavity 135. At this time, the valve core releases the blockage of the inlet of the glue tube 134. Under its own pressure, the high-temperature hot melt glue in the glue cavity 135 flows through the glue tube 134 to the glue outlet 132 and the extension tube 131. When the glue application command is terminated, the force of the external power source disappears, and the elastic force of the return spring pushes the valve core to reset, re-blocking the inlet of the glue tube 134. The flow path of the glue is cut off, and the glue dispensing action stops.

[0048] In the valve tube body 13, the preheating chamber 22, the circulation chamber 24, the return chamber 23, and the airflow drive mechanism 15 together form a closed gas circulation loop. (See attached image) Figure 3 and combined Figure 4 As shown, when the high-temperature adhesive enters the adhesive chamber 135 through the adhesive tube 134, the heat it carries is conducted through the tube wall to the return chamber 23, causing the gas in the return chamber 23 to be heated. The airflow drive mechanism 15 extracts the high-temperature gas and pumps it to the bottom of the preheating chamber 22. Then, it enters the return chamber 23 through the circulation chamber 24 to complete continuous circulation. The circulation loop allows the gas to flow only inside, reducing heat loss and concentrating the absorption of the adhesive heat for reuse, reducing energy consumption. At the same time, the continuous preheating effect can maintain the extension tube 131 at a stable temperature, reducing the situation where the high-temperature adhesive comes into contact with the low-temperature tube wall and causes heat loss, ensuring the stability of the adhesive flow and dispensing state.

[0049] It is important to note that when the high-temperature adhesive enters the adhesive cavity 135 through the adhesive tube 134, its temperature is maintained at 120-180℃ (this temperature range is the normal working temperature of hot melt adhesives used in casual shoe production, and is suitable for the melting and flow requirements of mainstream shoe hot melt adhesives such as EVA and polyurethane). The adhesive tube 134 can be made of stainless steel or aluminum alloy, which has good thermal conductivity. The return cavity 23 is arranged around the outside of the tube wall of the adhesive tube 134, forming a comprehensive and tight heat exchange contact surface with the outer wall of the adhesive tube 134. The heat carried by the adhesive will be transferred to the outside through the tube wall of the adhesive tube 134 by heat conduction, directly acting on the gas in the return cavity 23. At the same time, the gas forms natural convection with the tube wall in the return cavity 23, further accelerating the heat transfer. Therefore, the gas in the return cavity 23 can be heated up quickly.

[0050] Combination Figure 5 and Figure 6 As shown, the gas intake branch pipe 154 is fixedly installed on the upper inner wall of the return chamber 23 to extract the gas heated in the return chamber 23. The gas supply branch pipe 155 is fixedly installed on the lower inner wall of the preheating chamber 22, with one end extending out of the surface of the sleeve 21 to reserve connection space. One end of the gas intake pipe 151 is inserted into the gas intake branch pipe 154 and connected through a sealing structure. One end of the gas supply pipe 153 is inserted into the gas supply branch pipe 155 and connected through a sealing structure. (The sealing connection method keeps the gas circulation loop in a closed state. The sealing structure adopts existing technology and will not be described in detail here.)

[0051] Back Figure 2 It can be seen that the pump body 152 is fixedly installed on the vertical drive structure 12 by a bracket. The other end of the air intake pipe 151 is sealed to the air inlet of the pump body 152, and the other end of the air supply pipe 153 is sealed to the air outlet of the pump body 152. The pump body 152 can move synchronously with the vertical drive structure 12 without affecting the horizontal and vertical position adjustment of the valve pipe body 13.

[0052] During operation, the pump body 152 draws high-temperature gas from the return chamber 23 through the air intake pipe 151 and the air intake branch pipe 154, and then delivers the high-temperature gas to the bottom of the preheating chamber 22 through the air supply pipe 153 and the air supply branch pipe 155. The layout of the air intake branch pipe 154 located at the upper end of the return chamber 23 and the air supply branch pipe 155 located at the lower end of the preheating chamber 22, together with the pump body 152, makes the gas flow in a directional manner in the circuit, ensuring the smoothness of gas circulation. At the same time, the pump body 152 provides continuous power, so that the gas can flow continuously between the preheating chamber 22, the circulation chamber 24, and the return chamber 23, ensuring the continuous preheating of the extension pipe 131 and the glue outlet 132, maintaining the continuity of heat recovery and utilization, and ensuring the stability of glue flow and glue dispensing state.

[0053] The aforementioned pump body 152 adopts a micro-vane pump structure, with its core consisting of a micro DC motor, rotor, vanes, and an integrated pump casing. It is a miniaturized structure. Its working principle is well-known to those skilled in the art: the micro DC motor starts upon receiving a control signal, driving the rotor to rotate at high speed. The elastic vanes on the rotor, under centrifugal force, adhere tightly to the inner wall of the pump casing, forming multiple dynamically sealed chambers. As the rotor rotates, the chamber volume gradually increases on the inlet side, generating negative pressure. High-temperature gas is drawn from the return chamber 23 through the air intake pipe 151, and the chamber volume increases on the outlet side. The pressure gradually decreases on the side to generate positive pressure, which pressurizes the high-temperature gas and pushes it to the preheating chamber 22 through the gas supply pipe 153. In addition, the pump body 152 is fixed to the non-transmission area of ​​the vertical drive structure 12 by the bracket, maintaining a safe distance of 5cm from the valve pipe body 13. This will not occupy the installation and movement space of the valve pipe body 13, nor will it affect the driving accuracy of the vertical drive structure 12 due to its own weight. Moreover, it can rise and fall synchronously with the vertical drive structure 12 and move synchronously with the horizontal drive structure 11, without interfering with the glue application position adjustment and operation of the valve pipe body 13.

[0054] Furthermore, both the air intake pipe 151 and the air supply pipe 153 are flexible PU hoses with an outer insulation material (such as a foam insulation layer). Their inner diameter can be set at 8-12mm, providing good flexibility and extensibility. During installation, they are arranged along the side of the bracket of the vertical drive structure 12 and fixed in sections using adjustable clips (not shown in the figure). A 10-15cm redundancy length is reserved at the connection points of the air intake pipe 151 and the pump body 152, and the air supply pipe 153 and the pump body 152. This redundancy is used when the valve pipe body 13 moves horizontally. The length can be adjusted to positional changes by bending the hose. Within the lifting stroke range of the vertical drive structure 12, the hose adapts to height changes by its own expansion and contraction or by bending along the side of the bracket, without contacting the transmission components such as the ball screw and linear guide of the horizontal drive structure 11. The entire circuit avoids the glue dispensing area and movement trajectory of the valve tube body 13, and does not cross the up, down, left, and right movement range of the valve tube body 13 throughout the entire process. This ensures that when the valve tube body 13 moves within its maximum stroke, the pipe will not be squeezed, tangled, or pulled, and its operational stability and glue application accuracy will not be affected.

[0055] As can be seen from the above, the gas intake pipe 151 and the gas supply pipe 153 are made of heat-insulating material, the pump body 152 is made of low thermal conductivity material, and the conveying path is short and the heat exchange area is small, so that the gas temperature delivered to the preheating chamber 22 will not drop significantly, and the extension pipe 131 can be preheated.

[0056] like Figure 7 and Figure 8 As shown, a liquid storage chamber 31 is formed at the bottom of the sleeve 21. A mesh plate 32 is fixedly installed at the top opening of the liquid storage chamber 31, and the mesh plate 32 can cover the top opening area of ​​the liquid storage chamber 31. An openable and closable drain valve 33 is installed on one side of the bottom of the liquid storage chamber 31. The drain valve 33 communicates with the inside of the liquid storage chamber 31. Figure 9 As shown, the bottom surface of the liquid storage chamber 31 is an inclined surface facing the drain valve 33, so that the condensate can flow naturally to the drain valve 33.

[0057] Specifically, the liquid storage chamber 31 can collect condensate in a concentrated manner, reducing the impact of condensate adhering to the outer wall of the extension pipe 131 on heat transfer efficiency. The inclined bottom surface causes the condensate in the liquid storage chamber 31 to converge towards the drain valve 33 under the action of gravity, making it easy to quickly discharge condensate when the drain valve 33 is opened. The openable and closable drain valve 33 allows the condensate stored in the liquid storage chamber 31 to be discharged periodically, preventing excessive accumulation and overflow of condensate, and ensuring the cleanliness of the gas circulation loop and the operational stability of the preheating component 14.

[0058] The aforementioned drain valve 33 is a miniature manual needle valve. Its working principle is as follows: The drain valve 33 contains a conical valve core and a valve seat. The valve core is connected to the valve stem via threads, and the valve stem extends to the outside of the valve body and is equipped with a miniature operating knob. In the closed state, the valve core tightly adheres to the valve seat under the pre-tightening force of the threads, achieving a sealed isolation between the liquid storage chamber 31 and the outside environment. When condensate needs to be drained, rotating the operating knob moves the valve stem and valve core axially, causing the valve core to separate from the valve seat and form a drainage channel. The condensate in the liquid storage chamber 31 collects along the inclined bottom surface under gravity and is discharged through this channel. After drainage is completed, rotating the knob in the opposite direction resets the valve core, causing it to re-adhere to the valve seat and restore the sealing state. The drain valve 33 is installed at the bottom of the liquid storage chamber 31, maintaining a safe distance from the movement trajectory of the valve tube body 13 and the glue dispensing area, thus not interfering with the positional movement of the valve tube body 13 or the normal operation of the glue application.

[0059] The inner walls of the gas circulation loop have rounded corners at all turning points to reduce gas flow resistance and guide condensate to accumulate in the liquid storage chamber 31.

[0060] Back Figure 8 As shown, the part of the extension tube 131 located inside the preheating chamber 22 is the core preheating area. Multiple ribs 30 are fixedly installed on the outer surface of the extension tube 131. The ribs 30 are made of thermally conductive material (such as stainless steel or aluminum alloy) and are evenly distributed on the outer wall of the extension tube 131. The spacing between adjacent ribs 30 is adapted to the gas flow path in the preheating chamber 22. The height of the ribs 30 does not exceed the cavity gap of the preheating chamber 22. When the high-temperature gas rises along the outer wall of the extension tube 131 in the preheating chamber 22, the ribs 30 can increase the contact area between the extension tube 131 and the high-temperature gas. At the same time, the distribution of the ribs 30 will create a slight disturbance to the airflow, breaking the boundary layer that may be formed during the gas flow process, so that the high-temperature gas can fully contact the outer wall of the extension tube 131 and the surface of the ribs 30, thereby improving the heat transfer efficiency.

[0061] Working principle:

[0062] After the equipment is started, the high-temperature hot melt adhesive, which is maintained at a temperature of 120-180℃, enters the adhesive chamber 135 through the adhesive tube 134. The tube wall of the adhesive tube 134 conducts the heat of the adhesive liquid to the return chamber 23 surrounding it, so that the gas in the chamber is heated.

[0063] Subsequently, the airflow drive mechanism 15 is activated, drawing high-temperature gas from the return chamber 23 through the air intake pipe 151 and the air intake branch pipe 154. The gas is then pumped to the bottom of the preheating chamber 22 through the air supply pipe 153 and the air supply branch pipe 155. The high-temperature gas rises along the outer wall of the extension pipe 131 in the preheating chamber 22. The heat exchange area is increased by the fins 30 on the outer surface of the extension pipe 131, which efficiently preheats the extension pipe 131 and the glue outlet 132. After that, the gas flows back to the return chamber 23 through the circulation chamber 24, forming a closed gas circulation loop. The temperature loss is reduced by the use of the heat-insulated pipe and the low thermal conductivity pump body 152, realizing the recovery and reuse of the glue heat and continuous preheating.

[0064] The condensate generated during the gas circulation process is guided along the rounded corner structure of the inner wall of the gas circulation loop, falls into the liquid storage chamber 31 through the mesh plate 32 at the top of the liquid storage chamber 31, and collects towards the drain valve 33 under the guidance of the inclined bottom surface. The condensate can be discharged by periodically opening the drain valve 33. During the entire operation, the gas intake pipe 151 and the gas supply pipe 153 are adapted to the movement of the valve body 13 through the redundant design of the flexible heat-insulating hose. The miniaturized structure of the pump body 152 and the drain valve 33 does not interfere with the operation of the equipment. Finally, through the synergistic effect of heat recovery preheating, precise position adjustment and stable glue circuit control, smooth and stable glue dispensing is ensured, and the glue application quality and energy utilization efficiency are improved.

[0065] Example 2: This example, based on the content provided in Example 1, aims to provide a method for applying adhesive in the production of casual shoes. The specific steps are as follows:

[0066] Step 1: Start the device and initialize the horizontal drive structure 11 and the vertical drive structure 12;

[0067] Step 2: The high-temperature adhesive is transported to the outlet 132 through the adhesive tube 134. The heat of the adhesive heats the gas in the return chamber 23 through the tube wall of the adhesive tube 134, forming high-temperature gas.

[0068] Step 3: Start the pump body 152 to drive the gas in the gas circulation loop to start circulating; driven by the pump body 152, the high temperature gas enters the bottom of the preheating chamber 22 through the gas supply pipe 153 and the gas supply branch pipe 155, and rises in the preheating chamber 22 to preheat the extension pipe 131 and the glue outlet 132.

[0069] Step 4: After preheating is completed, the hot melt adhesive is applied from the dispensing port 132 by controlling the adhesive path control mechanism 133.

[0070] Step 5: The preheated gas continues to circulate, flowing sequentially through the circulation chamber 24 and the return chamber 23 to continuously recover the heat of the adhesive and maintain the preheating effect. The condensate generated during the circulation process is collected in the storage chamber 31 by the mesh plate 32 and periodically discharged through the drain valve 33.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gluing treatment device for casual shoe production, comprising a device body (1), wherein the device body (1) is provided with a horizontal drive structure (11) and a vertical drive structure (12) for driving the valve tube body (13) to move. The valve tube body (13) is provided with a glue cavity (135) for supplying hot melt adhesive and a glue tube (134) communicating with the glue cavity (135). The glue cavity (135) is provided with a glue path control mechanism (133). The bottom of the valve tube body (13) is provided with a glue outlet (132). The valve tube body (13) is characterized in that: An extension tube (131) is fixedly installed at the outlet (132). A preheating assembly (14) is sleeved on the outside of the extension tube (131). The preheating assembly (14) includes a sleeve (21) fixed on the outside of the extension tube (131). A preheating cavity (22) is formed between the sleeve (21) and the extension tube (131) surrounding the extension tube (131). A return cavity (23) is opened around the outside of the tube wall of the tube (134). A circulation cavity (24) is opened around the lower end of the tube cavity (135). The bottom of the preheating cavity (22) is connected to the outlet of the airflow drive mechanism (15). The airflow drive mechanism (15) is set on the outer wall of the valve tube body (13), and its inlet is connected to the return cavity (23). When the equipment is started, the high-temperature adhesive flows through the adhesive tube (134), and its heat heats the gas in the return chamber (23) through the tube wall. The airflow drive mechanism (15) pumps the high-temperature gas formed by the heat to the bottom of the preheating chamber (22). The high-temperature gas rises in the preheating chamber (22) and preheats the extension tube (131) and the adhesive outlet (132). Then it flows through the circulation chamber (24) and the return chamber (23) in sequence to recover the heat of the adhesive and realize continuous gas preheating circulation. The top of the preheating chamber (22) is connected to the circulation chamber (24), and the top of the circulation chamber (24) is connected to the return chamber (23), so that the preheating chamber (22), circulation chamber (24), return chamber (23) and airflow drive mechanism (15) together form a closed gas circulation loop. The airflow drive mechanism (15) includes an air intake branch pipe (154) installed on the upper inner wall of the return chamber (23), an air supply branch pipe (155) installed on the lower inner wall of the preheating chamber (22), the air supply branch pipe (155) extending out of the surface of the sleeve (21), an air intake pipe (151) sealed inside the air intake branch pipe (154), an air supply pipe (153) sealed inside the air supply branch pipe (155), a pump body (152) mounted on the vertical drive structure (12) via a bracket, and the other ends of the air intake pipe (151) and the air supply pipe (153) sealed to the air inlet and air outlet of the pump body (152) respectively.

2. The gluing equipment for casual shoe production according to claim 1, characterized in that: The bottom of the sleeve (21) is provided with a liquid storage chamber (31), and a mesh plate (32) is fixedly installed at the top opening of the liquid storage chamber (31). The liquid storage chamber (31) is used to collect and store the moisture generated by the pre-condensation of gas in the sleeve (21).

3. The gluing equipment for casual shoe production according to claim 2, characterized in that: A drain valve (33) that can be opened and closed is installed on one side of the bottom of the liquid storage chamber (31), and the drain valve (33) is used to periodically drain condensate.

4. The gluing equipment for casual shoe production according to claim 3, characterized in that: The bottom surface of the liquid storage chamber (31) is an inclined surface, which gradually decreases from the side away from the drain valve (33) to the side closer to the drain valve (33).

5. The gluing equipment for casual shoe production according to claim 4, characterized in that: The inner wall of the gas circulation loop has rounded corners at the turning points to reduce gas flow resistance and guide condensate to accumulate in the liquid storage chamber (31).

6. The gluing equipment for casual shoe production according to claim 1, characterized in that: The outer walls of the gas intake pipe (151), gas supply pipe (153), gas intake branch pipe (154), and gas supply branch pipe (155) are all covered with a heat insulation layer.

7. The gluing equipment for casual shoe production according to claim 1, characterized in that: The extension tube (131) has multiple ribs (30) fixedly installed on the outer surface of the tube segment located in the preheating chamber (22).

8. A method for applying adhesive in the production of casual shoes, characterized in that, The gluing equipment for casual shoe production as described in claim 3 includes the following steps: S1. The device starts up and initializes the horizontal drive structure (11) and the vertical drive structure (12). S2. The high-temperature adhesive is transported to the outlet (132) through the adhesive tube (134). The heat of the adhesive heats the gas in the return chamber (23) through the tube wall of the adhesive tube (134) to form high-temperature gas. S3. Start the pump body (152) to drive the gas in the gas circulation loop to start circulating; under the drive of the pump body (152), the high temperature gas enters the bottom of the preheating chamber (22) through the gas supply pipe (153) and the gas supply branch pipe (155), and rises in the preheating chamber (22) to preheat the extension pipe (131) and the glue outlet (132); S4. After preheating is completed, the hot melt adhesive is applied from the dispensing port (132) by controlling the adhesive path control mechanism (133). S5. The preheated gas continues to circulate, flowing through the circulation chamber (24) and the return chamber (23) in sequence to continuously recover the heat of the adhesive and maintain the preheating effect. The condensate generated during the circulation process is collected in the storage chamber (31) by the mesh plate (32) and discharged periodically through the drain valve (33).

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