A primer coating device for surface coating of injection molded products

Abstract

The utility model belongs to injection molding equipment technical field, concretely relates to a kind of bottom coating equipment for the glueing of injection molding product surface, including main mounting seat, and main mounting seat is equipped with turnover mechanism, glue dispensing mechanism and handling mechanism, and turnover mechanism includes the turnover platform that can be vertically overturned, and turnover platform is used to carry glue dispensing tool, and glue dispensing tool is driven to turn over after positive and negative two sides of turnover platform, glue dispensing mechanism carries out glue dispensing to the positive and negative two sides of injection molding product placed in glue dispensing tool, and handling mechanism is used to drive glue dispensing tool circulation.The utility model is by being equipped with turnover mechanism, and glue dispensing mechanism can carry out glue dispensing to the positive and negative two sides of injection molding product, replace manual glue dispensing, and improve glue dispensing speed.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding equipment technology, specifically relating to a primer coating device for applying adhesive to the surface of injection molded products. Background Technology

[0002] Rigid-soft injection molded products refer to products that combine two different materials and hardnesses of plastic through an injection molding process. This combination method is typically used to enhance the functionality and aesthetics of products, and common applications include automotive interior trim parts, medical device accessories, and consumer electronics components. For example, in the manufacturing process of in-ear Bluetooth headset shells, conventional thermoplastic plastics such as PC, ABS, or PP are first used to form the rigid part of the product in an injection molding machine, providing sufficient support and strength for the overall part. Then, liquid or solid silicone is applied to the surface of the rigid product to provide a comfortable feel, ultimately forming a rigid-soft injection molded product.

[0003] Because silicone has poor adhesion to conventional thermoplastics, a special adhesive, such as silicone adhesive or a primer, is usually sprayed onto the surface of the rigid part after injection molding to enhance the bonding strength. Traditional production processes rely on manual application, which is unsuitable for mass production due to the small size of the products, the need for application on both sides, and the curved surfaces of the products. Therefore, it is necessary to design a device capable of applying adhesive to both sides of injection-molded products to solve these technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a primer coating device for applying adhesive to the surface of injection molded products, so as to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is as follows:

[0006] A primer coating device for applying adhesive to the surface of injection molded products includes a main mounting base. The main mounting base is equipped with a flipping mechanism, a dispensing mechanism, and a conveying mechanism. The flipping mechanism includes a vertically flipping platform for carrying the dispensing fixture. After the flipping platform flips the dispensing fixture in both directions, the dispensing mechanism applies adhesive to both sides of the injection molded product placed in the dispensing fixture. The conveying mechanism is used to move the dispensing fixture around.

[0007] As a further improvement, the tilting mechanism includes a support fixedly mounted on the main mounting base, a swing cylinder fixedly mounted on the support base, two ends of the tilting platform being rotatably connected to the support base, and the output end of the swing cylinder being fixedly connected to one end of the tilting platform.

[0008] A top plate is provided below the flipping platform, and a flipping ejector pin is fixed on the top plate. One end of the flipping ejector pin passes through the flipping platform and the dispensing fixture in sequence and then mates with the surface of the injection molded product. The top plate is connected to the first drive mechanism.

[0009] As a further improvement, the first drive mechanism includes a first mounting plate located below the tilting platform. The first mounting plate is fixedly connected to the tilting platform via a guide column. The guide column is slidably engaged with the top plate. A pusher cylinder is fixedly mounted on the first mounting plate, and the output end of the pusher cylinder is fixedly connected to the top plate.

[0010] A buffer spring is fitted on the outer wall of the guide column. One end of the buffer spring abuts against the surface of the top plate, and the other end of the buffer spring abuts against the surface of the first mounting plate.

[0011] As a further improvement, a locking assembly is fixedly provided on the flipping platform. The locking assembly includes a locking cylinder and a locking block. The locking cylinder is fixedly provided on the flipping platform. One end of the locking block is fixedly connected to the output end of the locking cylinder, and the other end of the locking block is engaged with the dispensing fixture.

[0012] As a further improvement, a slide rail and a traction cylinder are fixedly mounted on the main mounting base, a sliding plate is slidably connected on the slide rail, and the output end of the traction cylinder is fixedly connected to the sliding plate.

[0013] A receiving cylinder is fixedly installed on the sliding plate, and a receiving seat is fixedly connected to the output end of the receiving cylinder. The receiving seat cooperates with the bottom of the dispensing fixture.

[0014] As a further improvement, the dispensing mechanism includes a dispensing platform, on which a calibration mechanism is provided. The calibration mechanism includes a second mounting plate that is vertically fixed on the dispensing platform. A feeding tray, a guide roller, and a receiving tray are rotatably mounted on the second mounting plate. A paper tape is wound on the feeding tray, and the surface of the paper tape rolls in cooperation with the circumferential side of the guide roller. One end of the paper tape is fixedly connected to the receiving tray. A first motor is fixedly mounted on the second mounting plate, and the output end of the first motor is fixedly connected to the end face of the receiving tray.

[0015] A vacuum suction plate is fixedly installed on the second mounting plate. A vent hole is provided through the upper surface of the vacuum suction plate, which is connected to the vacuum pumping component. The lower surface of the paper tape slides in conjunction with the upper surface of the vacuum suction plate. A vision inspection component is provided above the paper tape.

[0016] As a further improvement, a stationary plate is fixedly installed above the main mounting base, and a horizontally reciprocating ejector cylinder is installed below the stationary plate. An ejector rotating ejector pin is fixedly connected to the output end of the ejector cylinder. The top of the ejector rotating ejector pin passes through the stationary plate and the dispensing fixture in sequence and then abuts against the surface of the injection molded product.

[0017] As a further improvement, the main mounting base is equipped with a feeding mechanism, which includes a linear vibrator and a flexible vibrator mounted on the main mounting base. The linear vibrator is connected to a storage bin, which is hollow inside, with a feeding port at the top and a discharge port at the bottom side.

[0018] The flexible vibrator is connected to a feeding tray, the top of which has an opening that corresponds to the discharge port, and a vision inspection component is installed above the feeding tray.

[0019] Due to the adoption of the above technical solution, the beneficial technical effects of this utility model are as follows:

[0020] This utility model provides a primer coating device for applying adhesive to the surface of injection molded products. By setting a flipping mechanism, the dispensing mechanism can dispense adhesive to both the front and back sides of the injection molded product, thereby increasing the dispensing speed and ensuring the consistency of the dispensing effect.

[0021] By setting up a calibration mechanism, after completing the preset number of dispensing cycles, the vision inspection component confirms the dispensing volume and dispensing trajectory accuracy of the triaxial dispensing machine. Operators can promptly detect any abnormalities that occur during the dispensing process and take appropriate measures in a timely manner.

[0022] By setting up a feeding mechanism, a linear vibrator drives the storage bin to vibrate, discharging the injection-molded product from the outlet, thus completing the feeding process. A flexible vibrator drives the feeding tray to vibrate, causing the injection-molded product to flip, thus satisfying the feeding requirements, which is convenient and quick. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the flipping mechanism of this utility model;

[0025] Figure 3 This is a structural schematic diagram of some parts of the flipping mechanism of this utility model;

[0026] Figure 4 This is a structural schematic diagram of the flipping mechanism and the receiving seat of this utility model;

[0027] Figure 5 This is a schematic diagram of the calibration mechanism of this utility model;

[0028] Figure 6 This is a schematic diagram of the ejector pin and reverse tooling of this utility model;

[0029] Figure 7 This is a schematic diagram of the feeding mechanism of this utility model.

[0030] Wherein: 1-Main mounting base, 2-Tilting mechanism, 201-Tilting platform, 202-Support base, 203-Swing cylinder, 204-Top plate, 205-Tilting ejector pin, 206-First drive mechanism, 2061-First mounting plate, 2062-Guide column, 2063-Pushing cylinder, 2064-Compression spring, 207-Locking assembly, 2071-Locking cylinder, 2072-Locking block, 208-Slide rail, 209-Traction cylinder, 210-Sliding plate, 211-Receiving cylinder, 212-Receiver base, 3-Point Glue mechanism, 301-dispensing platform, 302-calibration mechanism, 3021-second mounting plate, 3022-feeding tray, 3023-guide roller, 3024-receiving tray, 3025-paper tape, 3026-first motor, 3027-vacuum suction plate, 4-stationary plate, 401-ejection cylinder, 402-ejection ejector pin, 5-feeding mechanism, 501-linear vibrator, 502-flexible vibrator, 503-storage bin, 504-feeding tray, 6-dispensing fixture, 601-front fixture, 602-back fixture. Detailed Implementation

[0031] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional injection molding products that can be purchased commercially.

[0032] like Figure 1-7 As shown, a primer coating device for applying adhesive to the surface of injection molded products includes a main mounting base 1. The main mounting base 1 is provided with a flipping mechanism 2, a dispensing mechanism 3, and a conveying mechanism. The flipping mechanism 2 includes a vertically flipping platform 201, which is used to support a dispensing fixture 6. After the flipping platform 201 drives the dispensing fixture 6 to flip in both directions, the dispensing mechanism 3 applies adhesive to both sides of the injection molded product placed in the dispensing fixture 6. The conveying mechanism is used to drive the dispensing fixture 6 to rotate.

[0033] In practical applications, the dispensing fixture 6 is divided into a front fixture 601 and a back fixture 602. The front fixture 601 holds the injection-molded product with the front side facing up, and the back fixture 602 holds the injection-molded product with the back side facing up. The handling mechanism includes multiple six-axis robotic arms commonly used in existing technologies. Their structure will not be described in detail. The installation position of the six-axis robotic arms is determined according to the layout of the site space. The six-axis robotic arms are equipped with pneumatic grippers that can grasp the dispensing fixture 6 and pneumatic suction nozzles that can pick up the injection-molded products. These are all conventional technical means. After the dispensing mechanism 3 completes the dispensing on the front side of the injection molded product, the transport mechanism moves the front fixture 601 and the injection molded product inside it to the flipping platform 201. Then, a back fixture 602 is fastened on top of the front fixture 601. The flipping platform 201 rotates the front fixture 601 and the back fixture 602 vertically by 180°. The injection molded product inside the front fixture 601 is moved into the back fixture 602. At this time, the back side of the injection molded product is facing up. After the transport mechanism moves the back fixture 602 to the dispensing position, the dispensing mechanism 3 dispenses glue on the back side of the injection molded product.

[0034] In this embodiment, the flipping mechanism 2 includes a support base 202 fixedly mounted on the main mounting base 1. A swing cylinder 203 is fixedly mounted on the support base 202. Both ends of the flipping platform 201 are rotatably connected to the support base 202, and the output end of the swing cylinder 203 is fixedly connected to one end of the flipping platform 201. The swing cylinder 203 is used to drive the flipping platform 201 to flip vertically.

[0035] A top plate 204 is provided below the flipping platform 201. A flipping ejector pin 205 is fixedly provided on the top plate 204. One end of the flipping ejector pin 205 passes through the flipping platform 201 and the front tooling 601 in sequence and then mates with the surface of the injection molded product. The top plate 204 is connected to the first drive mechanism 206.

[0036] The first driving mechanism 206 is used to drive the top plate 204 and the flipping ejector pin 205 to move. After one end of the flipping ejector pin 205 abuts against the surface of the injection molded product, as the top plate 204 and the flipping ejector pin 205 continue to move, the flipping ejector pin 205 pushes the injection molded product from the front fixture 601 to the back fixture 602, which can effectively prevent the injection molded product from being unable to move out of the front fixture 601 due to friction or glue overflow.

[0037] In this embodiment, the first driving mechanism 206 includes a first mounting plate 2061 disposed below the flipping platform 201. The first mounting plate 2061 is fixedly connected to the flipping platform 201 via a guide post 2062. The guide post 2062 is slidably engaged with the top plate 204. A pusher cylinder 2063 is fixedly mounted on the first mounting plate 2061, and the output end of the pusher cylinder 2063 is fixedly connected to the top plate 204. When the pusher cylinder 2063 extends, it drives the top plate 204 and the flipping ejector pin 205 to slide upward along the guide post 2062, thereby ejecting the injection molded product from the front tooling 601. When the pusher cylinder 2063 retracts, it drives the top plate 204 and the flipping ejector pin 205 back to their original positions.

[0038] A compression spring 2064 is fitted onto the outer wall of the guide post 2062. One end of the compression spring 2064 abuts against the surface of the top plate 204, and the other end abuts against the surface of the first mounting plate 2061. When the top plate 204 moves upward, the compression spring 2064 is compressed, slowing down the movement speed of the top plate 204 and the flipping ejector pin 205, preventing the flipping ejector pin 205 from contacting the injection molded product with excessive force and causing surface damage to the injection molded product. When the top plate 204 moves downward, the compression spring 2064 gradually returns to its original state.

[0039] In this embodiment, a locking assembly 207 is fixedly provided on the flipping platform 201. The locking assembly 207 includes a locking cylinder 2071 and a locking block 2072. The locking cylinder 2071 is fixedly provided on the flipping platform 201. One end of the locking block 2072 is fixedly connected to the output end of the locking cylinder 2071, and the other end of the locking block 2072 is engaged with the dispensing fixture 6.

[0040] The locking components are used to secure the dispensing fixture 6, preventing it from falling off the flipping platform 201 during the flipping process. Specifically, the dispensing fixture 6 has a slot on its side wall. The locking cylinder 2071 extends, causing the locking block 2072 to move. After one end of the locking block 2072 engages with the slot, the dispensing fixture 6 can be fixed on the flipping platform 201. To ensure the best performance, locking components 207 need to be provided on both sides opposite to the front fixture 601 and both sides opposite to the back fixture 602.

[0041] In this embodiment, a slide rail 208 and a traction cylinder 209 are fixedly provided on the main mounting base 1. A sliding plate 210 is slidably connected on the slide rail 208, and the output end of the traction cylinder 209 is fixedly connected to the sliding plate 210.

[0042] A receiving cylinder 211 is fixedly installed on the sliding plate 210. A receiving seat 212 is fixedly connected to the output end of the receiving cylinder 211. The receiving seat 212 cooperates with the bottom of the dispensing fixture 6.

[0043] After the flipping platform 201 flips 180°, the reverse tooling 602 is positioned below the front tooling 601, and the receiving seat 212 is used to receive the reverse tooling 602. Specifically, the receiving cylinder 211 extends, causing the receiving seat 212 to move upward until the receiving seat 212 engages with the reverse tooling 602. The locking cylinder 2071, which engages with the reverse tooling 602, retracts, causing the locking block 2072 to release the reverse tooling 602 from its fixation, i.e., the reverse tooling 602 is released from the flipping platform 201. The receiving cylinder 211 retracts, causing the receiving seat 212 and the reverse tooling 602 to move downward and return to their original positions. Then, the traction cylinder 209 extends, causing the sliding plate 210 to move to a predetermined position and be driven by the conveying mechanism for circulation.

[0044] In this embodiment, the dispensing mechanism 3 includes a dispensing platform 301. The dispensing platform 301 uses a commonly used three-axis dispensing machine, the structure of which will not be described in detail. The dispensing platform 301 is equipped with a calibration mechanism 302, which is used to calibrate the dispensing volume and the accuracy of the dispensing trajectory of the three-axis dispensing machine. The calibration mechanism 302 includes a second mounting plate 3021 vertically fixedly mounted on the dispensing platform 301. A feeding tray 3022, a guide roller 3023, and a receiving tray 3024 are rotatably mounted on the second mounting plate 3021. A paper tape 3025 is wound on the feeding tray 3022. The surface of the paper tape 3025 rolls in contact with the circumferential side of the guide roller 3023. One end of the paper tape 3025 is fixedly connected to the receiving tray 3024. A first motor 3026 is fixedly mounted on the second mounting plate 3021. The output end of the first motor 3026 is fixedly connected to the end face of the receiving tray 3024.

[0045] A vacuum suction plate 3027 is fixedly mounted on the second mounting plate 3021. A vent hole is provided through the upper surface of the vacuum suction plate 3027, connecting to a vacuum pumping assembly. Specifically, the vacuum pumping assembly is a device capable of generating negative pressure, such as a vacuum generator. The lower surface of the paper tape 3025 slides against the upper surface of the vacuum suction plate 3027. A visual inspection assembly is located above the paper tape 3025. In this embodiment, the visual inspection assembly adopts existing, maturely applied structures such as CCD cameras and corresponding vision systems to achieve functions such as image acquisition, processing, analysis, and output. The working principles and connection methods of the above structures are common knowledge to those skilled in the art and can be obtained without additional creative work; therefore, they will not be described in detail here.

[0046] After the three-axis dispensing machine completes the set number of dispensing cycles, a dispensing calibration is required to promptly confirm the dispensing status and prevent batch dispensing anomalies. The specific dispensing calibration process is as follows: the vacuum assembly is activated, and the paper tape 3025 is attached to the upper surface of the vacuum suction plate 3027 under negative pressure. The three-axis dispensing machine dispenses adhesive along a predetermined trajectory on the paper tape 3025. The vision inspection assembly acquires and processes images of the dispensing marks on the paper tape 3025 and compares them with images of standard dispensing trajectories. The width of the dispensing trajectory determines the amount of adhesive, and the flatness of the dispensing trajectory determines its accuracy.

[0047] After completing one dispensing calibration, the first motor 3026 drives the take-up tray 3024 to rotate at a certain angle, and the paper tape 3025 coated with glue is then rolled up, while the unused paper tape 3025 is unfolded for the next dispensing calibration.

[0048] In this embodiment, a stationary plate 4 is fixedly provided above the main mounting base 1, and a horizontally reciprocating ejector cylinder 401 is provided below the stationary plate 4. An ejector pin 402 is fixedly connected to the output end of the ejector cylinder 401. The top of the ejector pin 402 passes through the stationary plate 4 and the reverse tooling 602 in sequence and then abuts against the surface of the injection molded product.

[0049] The injection molded product after dispensing is placed on the settling plate 4 to wait for the glue to fully cure. To speed up the curing process, an ion fan can be installed at the position corresponding to the settling plate 4. This not only speeds up the curing process but also eliminates static electricity on the surface of the injection molded product and the dispensing fixture 6.

[0050] The ejector cylinder 401 extends, causing the ejector pin 402 to move upward, thereby lifting the injection molded product from the reverse tooling 602. The pneumatic suction nozzle on the conveying mechanism then picks up the injection molded product and places it sequentially into the turnover tray. The ejector cylinder 401 is driven by a linear motion module to lift injection molded products at different positions on the reverse tooling 602.

[0051] In this embodiment, the main mounting base 1 is provided with a feeding mechanism 5. The feeding mechanism 5 includes a linear vibrator 501 and a flexible vibrator 502 provided on the main mounting base 1. The linear vibrator 501 is connected to a storage bin 503. The storage bin 503 is hollow inside, with a feeding port at the top and a discharge port at the bottom of the side.

[0052] The flexible vibrator 502 is connected to a feeding plate 504, which has an opening at the top and corresponds to the discharge port.

[0053] In operation, bulk injection molded products are manually poured from the feeding port into the storage hopper 503. After the linear vibrator 501 starts, some injection molded products are discharged from the discharge port into the loading tray 504. The vision detection component acquires and processes images of the injection molded products in the loading tray 504, identifying the face-up injection molded products based on their outer contour and reflectivity. The coordinate information of these products is then transmitted to the control system. The control system sends coordinate information and action commands to the conveying mechanism. The conveying mechanism removes the face-up injection molded products and places them into the front fixture 601, then transfers them to the next process step. When all face-up injection molded products are removed from the loading tray 504, the flexible vibrator 502 starts, causing the injection molded products to flip. Repeating the above steps allows for continuous feeding. When the injection molded products in the loading tray 504 are exhausted, the linear vibrator 501 starts, and the injection molded products in the storage hopper 503 slide out from the discharge port and fall into the loading tray 504, completing the replenishment.

[0054] In this embodiment, the injection molded product requiring dispensing is first placed into the storage hopper 503. Under the action of the linear vibrator 501, the injection molded product enters the loading tray 504. The vision detection component accurately identifies the injection molded product with its front side facing up, and the conveying mechanism places the injection molded product into the front fixture 601. The conveying mechanism places the front fixture 601 at the dispensing position, and the three-axis dispensing machine dispenses adhesive on the front side of the injection molded product. After the adhesive has cured, the conveying mechanism places the front fixture 601 onto the flipping platform 201, and a back fixture 602 is fastened on top of the front fixture 601. The locking component 207 secures the front fixture 601 and the back fixture 602.

[0055] The pusher cylinder 2063 extends, driving the flipping ejector pin 205 to push the injection molded product from the front fixture 601 to the back fixture 602. The swing cylinder 203 drives the flipping platform 201 to rotate 180°, thus flipping the injection molded product. The transport mechanism places the back fixture 602 at the dispensing position, and the three-axis dispensing machine dispenses glue to the back of the injection molded product. After the glue cures, the ejector cylinder 401 drives the ejector pin 402 to lift the injection molded product, and the transport mechanism places the injection molded product into the turnover tray.

[0056] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A primer coating device for applying adhesive to the surface of injection-molded products, comprising a main mounting base, characterized in that, The main mounting base is equipped with a flipping mechanism, a dispensing mechanism, and a transport mechanism. The flipping mechanism includes a vertically flipping platform, which is used to carry the dispensing fixture. After the flipping platform drives the dispensing fixture to flip in both directions, the dispensing mechanism dispenses glue to both sides of the injection molded product placed in the dispensing fixture. The transport mechanism is used to drive the dispensing fixture to move around.

2. The primer coating equipment for applying adhesive to the surface of injection molded products according to claim 1, characterized in that, The flipping mechanism includes a support base fixedly installed on the main mounting base, a swing cylinder fixedly installed on the support base, two ends of the flipping platform being rotatably connected to the support base, and the output end of the swing cylinder being fixedly connected to one end of the flipping platform. The flipping platform is provided with a top plate below it, and a flipping ejector pin is fixedly provided on the top plate. One end of the flipping ejector pin passes through the flipping platform and the dispensing fixture in sequence and then mates with the surface of the injection molded product. The top plate is connected to the first drive mechanism.

3. The primer coating equipment for applying adhesive to the surface of injection molded products according to claim 2, characterized in that, The first driving mechanism includes a first mounting plate disposed below the tilting platform. The first mounting plate is fixedly connected to the tilting platform through a guide column. The guide column is slidably engaged with the top plate. A pushing cylinder is fixedly disposed on the first mounting plate. The output end of the pushing cylinder is fixedly connected to the top plate. A buffer spring is fitted on the outer wall of the guide post. One end of the buffer spring abuts against the surface of the top plate, and the other end of the buffer spring abuts against the surface of the first mounting plate.

4. The primer coating equipment for applying adhesive to the surface of injection-molded products according to claim 3, characterized in that, A locking assembly is fixedly provided on the flipping platform. The locking assembly includes a locking cylinder and a locking block. The locking cylinder is fixedly provided on the flipping platform. One end of the locking block is fixedly connected to the output end of the locking cylinder, and the other end of the locking block is engaged with the dispensing fixture.

5. The primer coating equipment for applying adhesive to the surface of injection-molded products according to claim 4, characterized in that, The main mounting base is fixedly provided with a slide rail and a traction cylinder. A sliding plate is slidably connected to the slide rail, and the output end of the traction cylinder is fixedly connected to the sliding plate. A receiving cylinder is fixedly installed on the sliding plate, and a receiving seat is fixedly connected to the output end of the receiving cylinder. The receiving seat cooperates with the bottom of the dispensing fixture.

6. The primer coating equipment for applying adhesive to the surface of injection-molded products according to claim 5, characterized in that, The dispensing mechanism includes a dispensing platform, and a calibration mechanism is provided on the dispensing platform. The calibration mechanism includes a second mounting plate that is vertically fixedly installed on the dispensing platform. A feeding tray, a guide roller, and a receiving tray are rotatably mounted on the second mounting plate. A paper tape is wound on the feeding tray, and the surface of the paper tape rolls in cooperation with the circumferential side of the guide roller. One end of the paper tape is fixedly connected to the receiving tray. A first motor is fixedly installed on the second mounting plate, and the output end of the first motor is fixedly connected to the end face of the receiving tray. A vacuum suction plate is fixedly installed on the second mounting plate. A vent hole is provided through the upper surface of the vacuum suction plate, and the vent hole is connected to the vacuum pumping assembly. The lower surface of the paper tape is slidably engaged with the upper surface of the vacuum suction plate. A visual inspection assembly is provided above the paper tape.

7. The primer coating equipment for applying adhesive to the surface of injection-molded products according to claim 6, characterized in that, A stationary plate is fixedly installed above the main mounting base, and a horizontally reciprocating ejector cylinder is installed below the stationary plate. An ejector rotating ejector pin is fixedly connected to the output end of the ejector cylinder. The top of the ejector rotating ejector pin passes through the stationary plate and the dispensing fixture in sequence and then abuts against the surface of the injection molded product.

8. The primer coating equipment for applying adhesive to the surface of injection-molded products according to claim 7, characterized in that, The main mounting base is provided with a feeding mechanism, which includes a linear vibrator and a flexible vibrator mounted on the main mounting base. The linear vibrator is connected to a storage bin, which is hollow inside, with a feeding port at the top and a discharge port at the bottom side. The flexible vibrator is connected to a feeding tray, the top of which has an opening corresponding to the discharge port, and a vision inspection component is provided above the feeding tray.

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