Mobile phone middle frame gluing device

Abstract

The invention relates to the technical field of mobile phone assembly, and discloses a middle frame gluing device which comprises an operation table, a clamp base, a clamping arm, a glue injection barrel and a temperature control system. The glue injection barrel is arranged on the clamping arm, and the clamp base and the glue injection barrel move relatively; a glue injection head is arranged on the glue injection cylinder, the glue injection head comprises a pipe wall and a glue injection cavity, and the pipe wall wraps the glue injection cavity; a glue outlet control area is arranged below the glue injection head, an opening and closing plate is arranged at a glue outlet of the glue outlet control area, and one end of the opening and closing plate is in sliding connection with the glue injection head; the temperature control system comprises a heat supply module, an air control module, an air passing channel and an air outlet nozzle, the heat supply module is used for heating air, the air control module sends the hot air out of the air outlet nozzle and can also suck cold air into the air passing channel, and the cavity in the glue outlet control area is communicated with the air passing channel. The glue is effectively prevented from dripping, and meanwhile, the glue applying temperature required by flowing of the glue during glue applying can be maintained.

Description

Technical Field

[0001] The invention relates to the technical field of mobile phone assembly, and in particular to a mobile phone middle frame gluing device. Background Art

[0002] The middle frame of a mobile phone is located between the front panel and the back cover of the mobile phone. It supports and connects the various modules inside the mobile phone. A glue dispensing machine is often used to apply glue to the middle frame of the mobile phone, and the middle frame of the mobile phone is adhered and fixed to the corresponding panel.

[0003] For example, the glue commonly used to bond the mobile phone display screen to the frame is PUR hot melt glue. When applying the glue, it is necessary to maintain a suitable temperature such as 185℃-195℃. Therefore, a heating device is provided outside the glue injection barrel filled with glue to maintain the corresponding glue application temperature. When the glue dispenser is dispensing, the heated liquid glue is squeezed out by compressed air. When completing the dispensing of the current mobile phone middle frame, the needle under the glue injection barrel needs to be suspended above the small tray on one side during the idle period of replacing the mobile phone middle frame. The small tray is used to receive the glue dripping from the needle. Because the glue is still in a heated liquid state in the static state during the dispensing period, the glue will gather at the needle under the action of gravity. Although the top of the glue injection barrel is sealed, the gas will enter from the needle tip, causing the glue to drip from the needle.

[0004] Chinese patent CN108284044A discloses an automatic glue dispensing device, including a device platform, on which are arranged: a glue dispensing mechanism, a three-axis correction mechanism, a feeding mechanism, a feeding mechanism and a transfer robot; the feeding mechanism's conveying start is located in the swinging area, and the conveying end is located in the feeding area; the feeding mechanism's conveying start is located in the feeding area, and the conveying end is located in the picking area; the transfer robot's glue dispensing transfer track is programmed by offline programming software, and its working range at least covers the feeding area and the feeding area. The scheme recorded in the invention uses a six-axis transfer robot to grab products for hot melt glue dispensing operations. In order to maintain the corresponding glue application temperature, the technical solution described in the invention is provided with a heating cylinder for heating the barrel and a heating block for heating the needle. Among them, the heating block for heating the needle can prevent the heated glue from cooling down too early when passing through the needle, resulting in reduced permeability of the glue and premature solidification on the middle frame of the mobile phone, affecting the attachment of the screen or the back cover, etc. However, the disadvantage is that when it is used on equipment with a material replacement period, it is more likely to form glue dripping in a static state. In the prior art, if a baffle is installed on the glue injection port, the baffle will inevitably carry glue when opening and closing, which can easily cause the glue to drip uncontrollably under the action of adhesion, contaminating the table surface and even the parts to be coated.

[0005] In summary, there is an urgent need for a mobile phone middle frame gluing device that can delay the flow of glue in the cylinder during material replacement, effectively prevent glue dripping, and maintain the gluing temperature required for glue flow during gluing. Summary of the invention

[0006] In view of the problem of glue dripping in the glue dispensing equipment in the prior art, a mobile phone middle frame gluing device is proposed, which can delay the flow of glue in the cylinder during material replacement, effectively avoid glue dripping, and maintain the gluing temperature required for the glue flow during gluing.

[0007] In order to solve the above problems, the technical solution of the present invention is:

[0008] A middle frame glue coating device, comprising an operating table, a fixture base, a clamping arm, a glue injection barrel, and a temperature control system; the glue injection barrel is arranged on the clamping arm, the fixture base and the clamping arm are arranged on the operating table, the fixture base is used to clamp the equipment to be glued, and the fixture base and the glue injection barrel move relative to each other; the glue injection barrel is provided with a glue injection head, the glue injection head comprises a tube wall and a glue injection cavity, and the tube wall wraps the glue injection cavity; a glue discharge control area is arranged under the glue injection head, and an opening and closing plate is arranged at the glue discharge port of the glue discharge control area, and the opening and closing plate is arranged at the glue discharge port of the glue discharge control area. One end of the closing plate is slidably connected to the glue injection head, and the opening and closing plate is adjacent to the cavity in the glue output control area; the temperature control system includes a heating module, an air control module, an air passage, and an air outlet nozzle, the heating module is used to heat the air, and the air control module is used to send the air heated by the heating module along the air passage to the air outlet nozzle or provide negative pressure suction, the air passage is arranged in the tube wall, the air outlet nozzle is arranged on the outside of the tube wall and is connected with the air passage, and the cavity in the glue output control area is connected with the air passage.

[0009] As a preferred technical solution, the air passage in the tube wall is a spiral hollow tubular structure.

[0010] As a preferred technical solution, the air passage in the tube wall is a hollow sandwich structure.

[0011] As a preferred technical solution, the air outlet nozzle is arranged around the glue injection head.

[0012] As a preferred technical solution, it also includes a preheating nozzle, which forms an acute angle with the central axis of the glue outlet, and one end of the preheating nozzle is connected to the air passage.

[0013] As a preferred technical solution, the clamping arm includes a first control arm and a second control arm, the first control arm is perpendicular to the second control arm; the first control arm is movably connected to the glue injection cylinder, and the first control arm is movably connected to the second control arm.

[0014] As a preferred technical solution, the outer sleeve of the injection cylinder is provided with a rotating bearing, and the outer side of the rotating bearing is fixedly connected to the first control arm; the outer wall of the injection cylinder is also provided with a self-rotating rack, and the outer side of the rotating bearing is movably connected with a planetary gear, one side of the planetary gear is meshed with the self-rotating rack, and the other side is meshed with a fixed gear rod, and the fixed gear rod is arranged on the support frame of the clamping arm.

[0015] Beneficial effects of the present invention:

[0016] 1. The middle frame gluing device of the present invention comprises an operating table, a fixture base, a clamping arm, a glue injection cylinder, and a temperature control system. The fixture base and the clamping arm on the operating table can realize the gluing work on the glue-coated parts. The glue injection cylinder is provided with a glue injection head, and a glue discharge control area is provided under the glue injection head. The glue discharge control area can control the opening size of the glue discharge port. The temperature control system can heat the glue injection cylinder through hot air to maintain the glue application temperature at the end of the glue injection. At the same time, the temperature control system uses air as a medium for heating. When cold air is introduced, the glue injection head can be cooled, so that the temperature application environment can be switched at any time, the flow rate of glue in the glue injection cavity can be changed, and the accumulation rate of glue at the glue outlet can be reduced. At the same time, the change of wind direction of the wind control module of the temperature control system can not only change the temperature of the heat transfer medium, but also make the cavity in the glue outlet control area into a negative pressure state. Under the action of negative pressure, the opening and closing plates on both sides of the glue outlet slide and rotate relative to each other, thereby reducing or closing the opening size of the glue outlet, and further preventing the glue from dripping autonomously.

[0017] 2. The middle frame gluing device of the present invention has a preheating nozzle on its gluing head, and the preheating nozzle is connected to the air passage. The hot air provided by the temperature control system can be ejected through the preheating nozzle, thereby preheating the gluing path on the workpiece below the gluing head and further cleaning the dust on the gluing path. The workpiece to be glued after heating reduces the cooling rate of the glue, increases the assembly time for installation, and further avoids the influence of newly accumulated dust on the adhesive.

[0018] 3. The middle frame gluing device described in the present invention has a self-rotating rack outside the glue injection cylinder, and a planetary gear outside the self-rotating rack. By arranging a fixed gear rod on the support frame, the fixed gear rod is adapted to the glue coating path. When the glue coating reaches a corner and needs to turn, the planetary gear is meshed with the rack on the fixed gear rod and moves along the new glue coating path. The glue injection cylinder can be driven to rotate by the planetary gear, and the planetary gear can make the glue injection cylinder turn toward the direction of non-glue coating. The cooperation of the self-rotating rack, planetary gear and fixed gear rod can use the power of the glue injection cylinder to complete the self-rotation. There is no need to add a motor to the glue injection cylinder and there is no need to configure a corresponding electronic control system. The weight of the glue injection cylinder is relatively reduced and a complex control system is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of the gluing device for the mobile phone middle frame of the present invention;

[0020] Figure 2 This is a schematic diagram of the glue injection head of the glue coating device for the mobile phone middle frame of the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of the glue injection head of the glue coating device for the mobile phone middle frame of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of the glue discharging control area of ​​the mobile phone middle frame glue coating device of the present invention;

[0023] Figure 5 This is a schematic diagram of another glue injection head of the glue coating device for the mobile phone middle frame of the present invention;

[0024] Figure 6 This is a three-dimensional schematic diagram of another mobile phone middle frame gluing device of the present invention;

[0025] Figure 7 It is a partial schematic diagram of another mobile phone middle frame gluing device of the present invention.

[0026] The reference numerals and components involved in the drawings are as follows:

[0027] 1. Operating table; 2. Clamp base; 3. Clamping arm; 4. Glue injection cylinder; 5. Glue injection head; 6. Glue discharge control area; 7. Temperature control system; 8. Fixed gear rod; 11. Support frame; 21. Clamp slide rail; 31. First control arm; 32. Second control arm; 41. Rotating bearing; 42. Self-rotating rack; 43. Planetary gear; 51. Preheating nozzle; 52. Glue injection chamber; 53. Tube wall; 61. Glue outlet; 62. Opening and closing plate; 63. Vertical wall; 64. T-shaped slide; 71. Air passage; 72. Air outlet. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] Example 1

[0030] Please see attached Figure 1 , Figure 1Schematic diagram of the gluing device for the middle frame of a mobile phone according to the present invention; a gluing device for the middle frame comprises an operating table 1, a fixture base 2, a clamping arm 3, a glue injection cylinder 4, and a temperature control system 7; a fixture base 2 is provided on the operating table 1, and a plurality of threaded holes are provided on the fixture base 2 for fixing a fixture for clamping a part to be glued. In this embodiment, a fixture slide rail 21 is provided on the operating table 1, and the fixture slide rail 21 is slidably connected to the fixture base 2. Specifically, the fixture slide rail 21 and the fixture base 2 can be driven by a roller screw; the operating table 1 is also provided with a clamping arm 3. In the present embodiment, the clamping arm 3 comprises a horizontal arm fixed across the operating table 1 and a vertical arm slidably connected to the horizontal arm. The vertical arm is slidably connected to the glue injection cylinder 4. Similarly, the sliding connection between the horizontal arm and the vertical arm, and between the vertical arm and the glue injection cylinder 4 of the clamping arm 3 can be an existing transmission form such as a roller screw, a gear rack, etc.; the main cylinder of the glue injection cylinder 4 is used to load hot melt glue, and a heating component such as a heating wire is coated outside the cavity carrying the hot melt glue, which is used to continuously provide heat to the hot melt glue to maintain the corresponding glue application temperature.

[0031] Please see attached Figure 2 , Attachment Figure 3 , Figure 2 This is a schematic diagram of the glue injection head of the mobile phone middle frame glue coating device of the present invention. Figure 3 : is a cross-sectional schematic diagram of the glue injection head of the mobile phone middle frame glue coating device of the present invention; a glue injection head 5 is provided below the glue injection cylinder 4, and the glue injection head 5 is detachably connected to the glue injection cylinder 4, and the glue injection head 5 is a combination of a columnar structure and a conical structure, and its columnar structure is engaged with the columnar body protruding from the bottom of the glue injection cylinder 4, and the glue injection head 5 includes a tube wall 53 and a glue injection cavity 52 wrapped by the tube wall 53, and the glue injection cavity 52 is connected to the glue injection cylinder 4, and the glue in the glue injection cylinder 4 can flow out through the glue injection cavity 52; please refer to the attached Figure 4 , Figure 4The figure is a cross-sectional schematic diagram of the glue control area of ​​the mobile phone middle frame gluing device of the present invention. The lower end of the glue injection head 5, i.e., the end away from the end connected to the glue injection cylinder 4, is provided with a glue control area 6. The center of the glue control area 6 is provided with a glue outlet 61. Preferably, in the present embodiment, the glue outlet 61 on the glue injection head 5 is rectangular. The glue outlet 61 with a rectangular cross section is more uniform in glue discharge than the circular glue outlet 61 in the prior art, which alleviates the problem of uneven glue spreading caused by more glue in the middle and less glue on both sides of the circular glue outlet 61 on the glue coating path. The glue outlet 61 is provided with two opening and closing plates 62, which are arranged opposite to each other. A fixed baffle is adjacent to the opening and closing plates 62. The two opening and closing plates 62 and the two opposite fixed baffles surround a rectangular glue outlet 61. Both sides of the upper end of the opening and closing plates 62 are provided with protruding cylinders, which are convenient for rotation and sliding. Correspondingly, a T-shaped slide groove 64 is provided on the tube wall 53 above the opening and closing plates 62. The upper end of the opening and closing plates 62 can slide along the T-shaped slide groove 64. The cylinders on both sides are located on both sides of the slide groove. When the upper end of the opening and closing plates 62 moves horizontally, the lower end At the same time, it rotates around the axis of the cylinder at the upper end of the opening and closing plate 62. It should be understood that when the glue outlet 61 is in an open state, the opening and closing plate 62 is in a vertical state, and its lower end is located at the end of the glue outlet 61. The opening and closing plate 62 is divided into an upper and lower part, and the outer part of the upper half is a cavity structure, which is composed of a part of the opening and closing plate 62, the inner wall of the glue outlet control area 6, and the lower end face of the glue injection head 5. The outer side of the lower half of the opening and closing plate 62 is close to the vertical wall 63 of the glue outlet 61, that is, the opening and closing plate 62 uses the upper edge of the vertical wall 63 as the support line for relative sliding and rotation.

[0032] Please see attached Figure 3 The temperature control system 7 includes a heating module, an air control module, an air passage 71, and an air outlet 72; the heating module is also an electric heating wire, and the air control module can be a forward and reverse fan, which is installed at the air outlet of the box body and can supply air into the box body. When the rotation direction is changed, air can be sucked from the box body. The heating wire of the heating module is located on the air duct in the box body, and can heat the air flowing through. The heated air enters the air passage 71 through the air supply pipe. In this embodiment, the air passage 71 is a spiral hollow tube arranged inside and along the tube wall 53. The other end is connected to the air outlet nozzle 72, and the opening of the air outlet nozzle 72 faces upward or obliquely upward to prevent strong wind from directly blowing the glue laid on the middle frame of the mobile phone, and the air passage 71 is also provided with a connecting port connected to the cavity structure of the glue discharge control area 6, that is, when the wind control module blows air, the air volume can enter the cavity structure of the glue discharge control area 6 through the connecting port, and when sucking air, the air in the cavity structure of the glue discharge control area 6 can be sucked out to form a negative pressure area; since the wind control module can be separately arranged from the glue injection cylinder 4, it can also be arranged in an integrated manner, and further, a buffer pad can be arranged between the wind control module and the glue injection cylinder 4 to filter out vibrations that may be generated by the fan.

[0033] Please see attached Figure 5 , Figure 5 It is a schematic diagram of another glue injection head of the mobile phone middle frame gluing device of the present invention; in some preferred embodiments, the air passage 71 in the tube wall 53 is a hollow interlayer, that is, the tube wall 53 is a hollow cavity, and an air outlet nozzle 72 is provided at the lower end of the glue injection head 5, and the air outlet nozzle 72 is arranged around the tube wall 53, and the opening is inclined upward, and the structure of the air passage 71 is different from the spiral pipe only in different implementation methods.

[0034] The use of the present invention is as follows: the mobile phone middle frame loaded with glue to be coated is mounted on the fixture base 2, and the mobile phone middle frame is located below the glue injection cylinder 4. During the glue coating process, the heating component of the glue injection cylinder 4 remains in a working state. At the same time, the heating module of the temperature control system 7 heats the flowing air to a suitable temperature. The wind control module sends the hot air into the air passage 71 in the glue injection head 5 and blows it out from the air outlet 72. The hot air sent in can maintain the glue application temperature of the glue injection cavity 52, and avoid the premature cooling of the glue caused by the decrease in ambient temperature during the flow or static process of the glue, thereby affecting the performance of the glue. The air enters the cavity structure of the glue outlet control area 6 through the connecting port, and pushes the upper ends of the opening and closing plates 62 to approach each other along the T-shaped slide groove 64. Finally, the opening and closing plates 62 are in a vertical state and close to the vertical wall 63, so that the glue outlet 61 maintains a rectangular opening. After the current mobile phone is completed After the middle frame is coated with glue, the next mobile phone middle frame needs to be replaced. At this time, the fan of the wind control module is reversed to provide reverse suction, sucking in cold air from the air outlet nozzle 72 and blowing it out through the wind channel 71, the air duct, and the wind control module in sequence. Under the cooling of the cold air, the glue in the glue injection cavity 52 of the glue injection head 5 is gradually cooled, reducing the fluidity in the glue injection cavity 52. ​​At the same time, the air in the cavity of the glue outlet control area 6 is also sucked out to form a negative pressure chamber. Under the action of negative pressure, the opening and closing plates 62 slide along the T-shaped slide groove 64, and the upper ends of the two opening and closing plates 62 relative to each other gradually move away. Since the displacement of the lower part of the opening and closing plates 62 is limited by the vertical wall 63, it slides relatively along the top edge of the vertical wall 63 and rotates, so that the lower ends of the two opening and closing plates 62 gradually approach each other, that is, the end opening of the glue outlet 61 gradually shrinks, thereby preventing the glue from dripping by itself.

[0035] It should be noted that the middle frame gluing device of the present invention comprises an operating table 1, a fixture base 2, a clamping arm 3, a glue injection cylinder 4, and a temperature control system 7. The fixture base 2 and the clamping arm 3 on the operating table 1 can realize the gluing work of the glue-coated parts. The glue injection cylinder 4 is provided with a glue injection head 5 thereunder, and a glue discharge control area 6 is provided under the glue injection head 5. The glue discharge control area 6 can control the opening size of the glue outlet 61. The temperature control system 7 can heat the glue injection cylinder 4 by hot air to maintain the glue application temperature at the end of the glue injection. At the same time, the temperature control system 7 adopts air as the medium for heating. The glue injection head 5 is heated, so when cold air is introduced, the temperature of the glue injection head 5 can be lowered, so that the heating environment can be switched at any time, the flow rate of the glue in the glue injection cavity 52 can be changed, and the gathering rate of the glue at the glue outlet 61 can be reduced. At the same time, the change of the wind direction of the wind control module of the temperature control system 7 can not only change the temperature of the heat-conducting medium, but also make the cavity in the glue outlet control area 6 become a negative pressure state. Under the action of the negative pressure, the opening and closing plates 62 on both sides of the glue outlet 61 slide and rotate relative to each other, thereby reducing or closing the opening size of the glue outlet 61, and further preventing the glue from dripping autonomously.

[0036] Example 2

[0037] Since the viscosity of hot melt adhesive will be affected after cooling, it is necessary to quickly cover it with a cover before the glue cools down. For the mobile phone middle frame after gluing, it is necessary to cover the screen or back cover and other components as soon as possible. In the above embodiment of the present invention, hot air is used to maintain the corresponding temperature of the injection site such as the injection port before the glue drips, but the dripping glue will also face the problem of cooling, especially in the gluing process, the parts to be glued are placed in batches at ambient temperature and then directly clamped on the fixture. Therefore, when gluing, the body of the part to be glued, such as the mobile phone middle frame, is in a relatively low temperature state. When glue drips on the body, it further causes the loss of glue temperature. In order to solve this problem, equipment that can increase the temperature of the part to be glued is needed. The separate installation of heating equipment not only increases the operating process, but also the high-temperature parts to be glued increase the difficulty of the operator to take and install the parts.

[0038] In order to solve the above problem, in the present embodiment, a preheating nozzle 51 is provided on the glue injection head 5, one end of the preheating nozzle 51 is connected to the air passage 71, and the other end is an open structure, the preheating nozzle 51 and the central axis of the glue outlet 61 form an acute angle, that is, the opening on the other side of the preheating nozzle 51 is tilted downward, it should be understood that the preheating nozzle 51 is toward the movement direction of the glue injection cylinder 4, therefore, when the glue injection cylinder 4 is coating the glue, a part of the hot air delivered by the temperature control system 7 is blown out through the preheating nozzle 51, and the hot air blown out of the preheating nozzle 51 is obliquely facing the workpiece to be coated with glue, that is, on the glue coating path, the hot air blown out by the preheating nozzle 51 first contacts the workpiece to be coated with glue, preheats the workpiece to be coated with glue, and its wind force can clean the pollutants on the workpiece to be coated with glue, therefore, the preheating nozzle 51 not only realizes the heating of the workpiece to be coated with glue, but also further cleans the workpiece.

[0039] In order to make the preheating nozzle 51 always face the forward direction of the glue injection cylinder 4, when the glue coating path turns, the glue injection cylinder 4 needs to make a corresponding turn. When the turning of the glue injection cylinder 4 is realized by the motor, the motor must be loaded on the glue injection cylinder 4 and move with the glue injection cylinder 4, and a corresponding electronic control system needs to be set up to independently control the running time of the motor, and it is necessary to ensure that the running time of the motor corresponds to the moving path of the glue injection cylinder 4, which increases the load of the glue injection cylinder 4 and increases the complexity of the control system.

[0040] To solve the above problems, please refer to the attached Figure 6 , Attachment Figure 7 , Figure 6 This is a three-dimensional schematic diagram of another mobile phone middle frame gluing device of the present invention, Figure 7It is a partial schematic diagram of another mobile phone middle frame gluing device of the present invention; the clamping arm 3 in this embodiment includes a first control arm 31 and a second control arm 32, the first control arm 31 and the second control arm 32 are arranged on the support frame 11, in this embodiment, the first control arm 31 is provided with the glue injection cylinder 4, specifically, the glue injection cylinder 4 is sleeved with a rotating bearing 41 on its outer side, the outer shell of the rotating bearing 41 is movably connected to the first control arm 31, and the inner side of the rotating bearing 41 is fixedly connected to the glue injection cylinder 4, preferably, the rotating bearing 41 is a sliding friction bearing, which has a certain friction force and rotates relative to each other under the action of external force, the outer ring of the rotating bearing 41 forms a semi-enclosure on the inner ring, so that the rotating bearing 41 plays a bearing role, the first control arm 31 includes a driving rod and a support rod for sliding support, which are respectively arranged on both sides of the glue injection cylinder 4, and the driving rod is a roller screw, and the driving motor screw of the roller screw One end of the driving motor is also slidably connected to the supporting frame 11, and the sliding connection can adopt a linear bearing, and the support rod on the other side can also be connected by a linear bearing to improve the stability of the moving system; the second control arm 32 is movably connected to both ends of the first control arm 31, and the second control arm 32 also includes a driving rod and a support rod, and its driving rod is also a roller screw, and the driving rod of the first control arm 31 and one end of the support rod are together sleeved on the driving rod of the second control arm 32 to realize the driving of the first control arm 31. It should be understood that the connection between the first control arm 31 and the second control arm 32 can prevent the interference between the first control arm 31 and the second control arm 32 by means of staggered setting, that is, the relative movement mode of the first control arm 31 and the second control arm 32 is the existing technology, and the relative movement of the first control arm 31 and the second control arm 32 can complete the gluing work of the glue injection cylinder 4 on the workpiece.

[0041] In order to make the preheating nozzle 51 turn accordingly when the glue is turned, specifically, a self-rotating rack 42 is fixed on the outer side of the glue injection cylinder 4, and four sets of planetary gears 43 are provided on the self-rotating rack 42, the planetary gears 43 are opposite to each other and perpendicular to each other, and are respectively parallel to the first control arm 31 and the second control arm 32, the planetary gears 43 are movably connected with the housing of the rotating bearing 41, that is, the planetary gears 43 can rotate independently, and the rack of the planetary gear 43 is meshed with the self-rotating rack 42; the support frame 11 A fixed gear rod 8 is provided on it, and the fixed gear rod 8 is a telescopic rod with a rack at the end. The other end of the fixed gear rod 8 is detachably engaged with the support frame 11, and the rack on the fixed gear rod 8 is meshed with the other side of the planetary gear 43. In this embodiment, one end of the fixed gear rod 8 is clamped and fixed by a clamping block with bolts. It should be understood that another telescopic rod can also be set at the rack end of the fixed gear rod 8 to be vertically connected to it, and the other end of the telescopic rod is fixed to another part of the support frame 11, so that the fixation of the fixed gear rod 8 is more stable.

[0042] The operating principle of the middle frame gluing device described in this embodiment is: fix the workpiece on the fixing frame fixture, and adjust the position of the workpiece so that the gluing path is located below the glue outlet 61, and adjust and fix the positions of the four fixed gear rods 8 respectively, so that one end of the rack of the fixed gear rod 8 is located at the intersection of the two gluing path directions, and the other end is located on a path parallel to the gluing path on which the glue injection cylinder 4 is running. When the glue injection cylinder 4 reaches the turning point of the gluing path, the planetary gear 43 at the corresponding position on the glue injection cylinder 4 contacts with the rack on the fixed gear rod 8. During the gluing process of the equipment, the first control arm 31 drives the driving rod to drive the glue injection cylinder 4 to move along the gluing path on one side. When it moves to the turning point of the gluing path, the corresponding planetary gear 43 thereon meshes with the rack on the corresponding fixed gear rod 8. Driven by the second control arm 32, the glue injection cylinder 4 moves along the next section of the gluing path together with the first control arm 31. While moving, the rack on the fixed gear rod 8 drives the planetary gear 43 to rotate, and at the same time, the planetary gear 43 drives the self-rotating rack 42 to rotate, so that the glue injection cylinder 4 rotates and finally the preheating nozzle 51 returns to the gluing path. The planetary gear 43 can make the rotation direction of the glue injection cylinder 4 consistent with the rotation direction of the gluing path, so that the preheating nozzle 51 is always in front of the gluing. It should be understood that the rotation of the glue injection cylinder 4 does not affect the glue discharge from the glue outlet 61.

[0043] It should be noted that the fixed gear rod 8 of the middle frame gluing device of the present invention is respectively located at the inflection point of the gluing path, which can provide a limit for the movement of the glue injection cylinder 4 to avoid movement deviation, and cooperate with whether the preheating nozzle 51 rotates to determine whether the glue injection cylinder 4 moves in place along the gluing path, thereby playing a role in monitoring the gluing process; the cooperation of the self-rotating gear, the planetary gear 43 and the fixed gear rod 8 realizes the self-rotation of the glue injection cylinder 4, and its self-rotation utilizes its own gluing movement. There is no need to add a motor and a corresponding electronic control system to the glue injection cylinder 4, which relatively simplifies the operation process; in the above embodiment, the glue injection cylinder 4 needs to rotate 90 degrees each time it rotates. The corresponding rotation angle can be achieved by reasonably setting the length of the rack on the fixed gear rod 8 and the gear ratio of the planetary gear 43 and the self-rotating rack 42. It should be understood that the self-rotating rack 42 can not only be arranged on the outside of the glue injection cylinder 4, but also at the end of the glue injection cylinder 4 to set a self-rotating rack 42 with a smaller diameter, that is, the self-rotating rack 42 is a circular ring with a gear.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principle of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A middle frame gluing device, characterized in that: The invention comprises an operating table, a fixture base, a clamping arm, a glue injection barrel, and a temperature control system; the glue injection barrel is arranged on the clamping arm, the fixture base and the clamping arm are arranged on the operating table, the fixture base is used to clamp the equipment to be glued, and the fixture base and the glue injection barrel move relative to each other; the glue injection barrel is provided with a glue injection head, the glue injection head comprises a tube wall and a glue injection cavity, and the tube wall wraps the glue injection cavity; a glue discharge control area is arranged under the glue injection head, and an opening and closing plate is arranged at the glue discharge port of the glue discharge control area, and one end of the opening and closing plate is connected to the glue dispensing device. The glue injection head is slidably connected, and the opening and closing plate is adjacent to the cavity in the glue output control area; the temperature control system includes a heating module, a wind control module, an air passage, and an air outlet nozzle. The heating module is used to heat the air, and the wind control module is used to send the air heated by the heating module along the air passage to the air outlet nozzle or provide negative pressure suction. The air passage is arranged in the tube wall, and the air outlet nozzle is arranged on the outside of the tube wall and is connected with the air passage, and the cavity in the glue output control area is connected with the air passage.

2. The middle frame gluing device according to claim 1, characterized in that: The air passage in the tube wall is a spiral hollow tubular structure.

3. The middle frame gluing device according to claim 1, characterized in that: The air passage in the tube wall is a hollow sandwich structure.

4. The middle frame gluing device according to claim 3, characterized in that: The air outlet nozzle is arranged around the glue injection head.

5. The middle frame gluing device according to claim 1, characterized in that: It also includes a preheating nozzle, which forms an acute angle with the central axis of the glue outlet, and one end of the preheating nozzle is connected to the air passage.

6. The middle frame gluing device according to claim 5, characterized in that: The clamping arm includes a first control arm and a second control arm, wherein the first control arm is perpendicular to the second control arm; the first control arm is movably connected to the glue injection cylinder, and the first control arm is movably connected to the second control arm.

7. The middle frame gluing device according to claim 6, characterized in that: The outer sleeve of the injection cylinder is provided with a rotating bearing, and the outer side of the rotating bearing is fixedly connected to the first control arm; the outer wall of the injection cylinder is also provided with a self-rotating rack, and the outer side of the rotating bearing is movably connected with a planetary gear, one side of the planetary gear is meshed with the self-rotating rack, and the other side is meshed with the rack on the fixed gear rod, and the fixed gear rod is arranged on the supporting frame of the clamping arm.

8. The middle frame gluing device according to claim 7, characterized in that: The fixed gear rod is a telescopic rod, and the fixed gear rod is detachably fixedly connected to the clamping arm.

9. The middle frame gluing device according to claim 7, characterized in that: The self-rotating rack is a hollow annular structure with a rack.

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