Equipment and process for injection molding of plastic shell and automatic identification and removal of water gap

Abstract

The invention discloses equipment and technology for injection molding of a plastic shell and automatic identification and removal of a water gap, the equipment comprises a base, a working platform with a positioning die holder and a lifting platform with a cutting blade, and automatic identification and lifting driving of the position of the water gap are achieved by arranging a moving mechanism composed of a visual sensor and a telescopic air cylinder; by arranging the pressing and cutting mechanism, the water gap is automatically pressed and fixed before cutting; by arranging the clamping mechanism, the water gap is automatically clamped and pulled out after cutting; by arranging the discharging mechanism, automatic classified discharging of the water gaps and the injection molding parts is finally achieved, the corresponding process steps comprise automatic recognition, movable alignment, press cutting, demolding and classified discharging, through integration of the mechanisms and the process, automation of the whole process from recognition, cutting, demolding to sorting is achieved, the production efficiency is improved, and the production cost is reduced. The problems that a traditional mode depends on manual work, positioning is not accurate, and secondary sorting is needed when products and water gaps are mixed are solved, and the production efficiency, the cutting quality and the automation level are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of sprue removal technology for injection molded parts, specifically to a device and process for automatic identification and removal of sprues in injection molding of plastic housings. Background Technology

[0002] Plastic casings are key components widely used in electronics, automotive parts, and daily consumer goods. The mainstream manufacturing process is injection molding. In the injection molding process, molten plastic is injected into the mold cavity through the mold's gating system. After cooling and solidification, the product is formed. In order to improve the production efficiency of plastic products, injection molding is generally carried out using a two-cavity or multi-cavity injection molding method. The part connecting the product and the gating system is called the "gate" (also known as the sprue). After the product is demolded, the sprue must be separated from the body to obtain a complete final product.

[0003] Currently used sprue removal equipment often focuses on adaptive shearing of sprues at different locations. However, in actual use, after shearing, the sprues and products are usually mixed together, requiring staff to sort them afterward, which increases workload, is time-consuming and labor-intensive, and affects the efficiency of sprue removal. Therefore, it is difficult to automatically classify and unload sprues and products.

[0004] To address this, we propose a device and process for injection molding of plastic shells and automatic identification and removal of sprue marks. Summary of the Invention

[0005] The purpose of this invention is to provide a device and process for injection molding of plastic shells and automatic identification and removal of sprue marks, which has the advantage of automatically classifying and unloading sprue marks and products, and solves the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device and process for injection molding of plastic shells and automatic identification and removal of sprue marks, comprising a base, on both sides of the base being fixedly connected to slide rails at symmetrical positions, and a working platform being horizontally movably connected to the slide rails on both sides. A positioning mold base for supporting the sprue marks of the injection molded parts is fixedly connected to the working platform, and a discharge hole for sorting and unloading the injection molded parts and sprue marks is opened at symmetrical positions on both sides of the working platform. An inclined groove for the injection molded parts to slide and fall is opened on the base. Two symmetrically placed columnar rods are fixedly connected to the two sides of the base away from the working platform, and a lifting platform is movably connected to the outer contour of the columnar rods on both sides. A cutting blade for removing sprue marks is fixedly connected to the two sides of the lifting platform near the center. The lifting platform is provided with a moving mechanism for automatically identifying the position of the sprue marks on the positioning mold base and driving the working platform to move, and a pressure cutting mechanism for the cutting blade to remove the sprue marks.

[0007] Preferably, the moving mechanism includes a vision sensor that automatically identifies the position of the sprue on the positioning mold base, which is fixedly connected to the side of the lifting platform near the working platform. The ends of the column rods are all fixedly connected to a top plate, and a telescopic cylinder is fixedly connected through the top plate for the vision sensor to control and drive the lifting platform to move up and down reciprocally. The telescopic cylinder is connected to the vision sensor via a signal.

[0008] Preferably, a fixing plate is fixedly connected to one end of the base near the working platform, and a third spring is fixedly connected to the opposite surface of the fixing plate and the working platform to guide the working platform to reset and move. Inclined panels are fixedly connected to both sides of the lifting platform at symmetrical positions, and cylindrical blocks are fixedly connected to both ends of the working platform near the inclined panels at symmetrical positions to guide the working platform to move horizontally back and forth.

[0009] Preferably, the pressing and cutting mechanism includes a cylindrical tube that is passed through and moved up and down on a lifting platform, through which a water supply port is inserted. A pressure block is fixedly connected to the outer contour of the bottom end of the cylindrical tube to press down and fix the water port on the inner wall of the positioning mold base. A first spring is fixedly connected to the opposite surface of the pressure block and the lifting platform to guide the pressure block to reset and move.

[0010] Preferably, the lifting platform is provided with a clamping mechanism for clamping the water inlet inside the cylindrical tube. The clamping mechanism includes fixed blocks fixedly connected to symmetrical positions on both sides of the lifting platform near the cylindrical tube. Movable rods are connected to both fixed blocks on both sides through and horizontally movable. Clamping blocks for clamping the water inlet inside the cylindrical tube are fixedly connected to the opposite ends of the movable rods on both sides.

[0011] Preferably, a second spring is fixedly connected to the opposite end of the moving rods on both sides of the fixed block to guide the clamping block to abut against the outer contour of the cylindrical tube, and through holes for the clamping block to enter are opened on the outer contour of both sides of the cylindrical tube.

[0012] Preferably, the lifting platform is provided with a feeding mechanism for releasing the clamping block from the internal water inlet of the cylindrical tube. The feeding mechanism includes lifting rods that are symmetrically connected to both sides of the top of the lifting platform and can be raised and lowered. The bottom ends of the lifting rods on both sides are rotatably connected to adjusting rods that pull the moving rods to move back and forth. The bottom ends of the adjusting rods on both sides are respectively rotatably connected to the moving rod on the adjacent side.

[0013] Preferably, the working platform is rotatably connected to a receiving tray for classifying and discharging sprues on one side near the lifting platform. Rectangular frames are fixedly connected to both sides of the bottom of the receiving tray, and support blocks for guiding the receiving tray to flip and discharge are fixedly connected to both sides of the base near the receiving tray. The ends of the support blocks on both sides are respectively connected to the inner wall of the adjacent rectangular frame.

[0014] Preferably, a process for injection molding of plastic housing and automatic identification and removal of sprue marks includes the following steps: S1. Automatic sprue position identification: The visual sensor detects the position of the sprue inside the positioning mold base and activates the telescopic cylinder, enabling the telescopic cylinder to push the lifting platform to complete one cycle of descent and ascent. S2. Moving worktable: When the lifting platform moves in the downward vertical direction, the cylindrical block can pull the work platform horizontally towards the bottom of the lifting platform under the action of the inclined plate, so that the work platform can move the positioning mold base to the corresponding position of the bottom of the cutting blade. S3, Press-cut sprue: When the lifting platform moves down and drives the pressure block to abut against the positioning mold base, and the end of the sprue passes through the inner wall of the cylindrical tube, the lifting platform moves down to squeeze the first spring, and the cylindrical tube extends upward. Then the first spring applies pressure to the pressure block, thereby pressing down and fixing the sprue in the groove of the positioning mold base, ensuring the stability of the cutting blade in cutting the sprue. S4. Demolding operation: As the pressure block presses down and pushes the cylindrical tube upward, when the cylindrical tube moves the through hole to the corresponding position of the clamping block, the moving rod, under the action of the second spring, can push the clamping blocks on both sides to move towards each other to the inner wall of the cylindrical tube and clamp the internal gate. When the lifting platform moves upward to reset, the clamping block can pull the gate away from the inner wall of the positioning mold base, thus realizing automatic demolding. S5. Sorting and unloading: When the lifting platform moves upward to reset, the working platform can simultaneously pull the receiving tray to the bottom of the lifting platform. As the lifting platform moves upward to its limit position, the adjusting rod, under the action of the lifting rod, can pull the moving rods on both sides and the clamping block to move in opposite directions and release the clamping of the sprue inside the cylindrical tube, so that the pressure block can vibrate and drop the sprue inside the cylindrical tube onto the receiving tray.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the system automatically identifies the location of the sprue using a visual sensor and triggers a telescopic cylinder to drive the lifting platform downwards. Simultaneously, the inclined panels on both sides of the lifting platform cooperate with the inclined surfaces of the cylindrical blocks on the work platform to automatically and precisely pull the worktable and positioning mold base directly below the cutting blade during the descent. This process integrates "visual recognition, signal drive, and mechanical linkage," solving the problem of traditional equipment relying on manual or fixed mechanical positioning, ensuring the accuracy of the cutting position, and greatly improving the equipment's adaptability and automation level.

[0016] 2. When the lifting platform presses down, the pressure block first contacts and presses the sprue in the positioning mold base. At the same time, the cylindrical tube moves up, causing the first spring to be compressed and store energy. The spring force continues to act on the pressure block, providing a stable downward pressure for the sprue. This effectively counteracts the vibration and displacement generated at the moment of cutting, achieving pressing before cutting. This fundamentally prevents poor cut surface, residue, or product damage caused by sprue shaking, and significantly improves the cutting quality and consistency.

[0017] Third, as the pressure block presses down and the cylindrical tube moves up, when the through hole on the cylindrical tube moves and aligns with the clamping block, the second spring pushes the clamping blocks on both sides to move towards each other, extending into the tube and firmly clamping the sprue. After the cutting is completed, the lifting platform moves up, and the clamping block can remove the sprue from the positioning mold base as a whole. No additional power is required, eliminating the tedious operation of manual removal or secondary processing, and ensuring the continuity of the production process.

[0018] IV. When the lifting platform moves upward to its limit position, the lifting rod contacts the top plate and presses down. The adjusting rod drives the clamping block to move in opposite directions, thereby releasing the sprue. At the same time, the working platform resets and moves the receiving tray downward. The released sprue vibrates and falls into the receiving tray. As the working platform continues to move towards the bottom of the lifting platform to remove the sprue, the receiving tray automatically flips under the leverage of the support block and the rectangular frame, pouring the sprue into the designated collection area. The injection molded part slides down through the discharge hole on the other side. The whole process does not require manual sorting, achieving efficient and thorough separation of the product and the sprue. This solves the problems of product mixing and time-consuming and labor-intensive subsequent sorting in the background technology, and greatly improves the overall operation efficiency.

[0019] The combined use of the above structures solves the problem that in the actual use of existing equipment, after shearing, the sprue and the product are usually mixed together, requiring workers to sort the sprue and the product afterward, which increases the workload, is time-consuming and labor-intensive, and affects the efficiency of sprue removal. Therefore, it is difficult to automatically classify and unload the sprue and the product. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 This is a three-dimensional structural diagram of the part where the working platform of the present invention is located; Figure 5 This is a three-dimensional structural diagram of the part where the receiving tray of the present invention is located; Figure 6 This is a three-dimensional cross-sectional view of the part where the lifting platform of the present invention is located; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point B; Figure 8 This is a three-dimensional structural diagram of the part where the adjusting rod of the present invention is located; Figure 9 This is a schematic diagram of the process for injection molding of the plastic shell and automatic identification and removal of sprue marks according to the present invention.

[0021] In the diagram: 1. Base; 101. Inclined groove; 2. Slide rail; 3. Working platform; 301. Material discharge hole; 4. Positioning mold base; 5. Columnar rod; 6. Lifting platform; 7. Cutting blade; 8. Vision sensor; 9. Top plate; 10. Telescopic cylinder; 11. Inclined panel; 12. Columnar block; 13. Columnar tube; 131. Through hole; 14. Pressure block; 15. First spring; 16. Fixing block; 17. Moving rod; 18. Clamping block; 19. Second spring; 20. Lifting rod; 21. Adjusting rod; 22. Fixing plate; 23. Third spring; 24. Receiving tray; 25. Rectangular frame; 26. Support block. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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. Example 1:

[0023] Please see Figures 1 to 9 This invention provides a technical solution: a device and process for injection molding of plastic shells and automatic identification and removal of sprue marks, comprising a base 1, with slide rails 2 fixedly connected to symmetrical positions on both sides of the base 1, and a working platform 3 horizontally movably connected to the slide rails 2 on both sides. A positioning mold base 4 for supporting the sprue marks of the injection molded parts is fixedly connected to the working platform 3, and a discharge hole 301 for sorting and unloading the injection molded parts and sprue marks is opened on both symmetrical positions on both sides of the working platform 3. An inclined groove 101 for the injection molded parts to slide and fall is opened on the base 1. Two symmetrically placed columnar rods 5 are fixedly connected to symmetrical positions on both sides of the base 1 away from the working platform 3. A lifting platform 6 is movably connected to the outer contour of the columnar rods 5 on both sides. A cutting blade 7 for removing sprue marks is fixedly connected to symmetrical positions on both sides of the lifting platform 6 near the center. The lifting platform 6 is provided with a moving mechanism for automatically identifying the position of the sprue marks on the positioning mold base 4 and driving the working platform 3 to move, and a pressing and cutting mechanism for the cutting blade 7 to remove the sprue marks.

[0024] In use, a base 1 is provided, and a slide rail 2 is provided on the base 1. The slide rail 2 is fixedly supported on the base 1, and a work platform 3 is provided on the slide rail 2. The work platform 3 can move horizontally along the slide rail 2. The positioning mold base 4 is provided on the work platform 3, and the positioning mold base 4 can be fixedly supported on the work platform 3. The column rod 5 is provided on the base 1, and the lifting platform 6 is provided on the column rod 5, so that the lifting platform 6 can move up and down and reciprocate along the outer contour of the column rod 5. The cutting blade 7 is provided on the lifting platform 6, and the cutting blade 7 can be fixedly supported on the lifting platform 6.

[0025] In actual use, the sprue on the injection molded part is first placed in the groove on the positioning mold base 4. The unloading hole 301 on the working platform 3 allows the injection molded part to be positioned above the unloading hole 301. Through the moving mechanism and the pressure cutting mechanism on the lifting platform 6, the moving mechanism can detect the position of the sprue in the groove of the positioning mold base 4 and drive the lifting platform 6 to move down. At the same time, the working platform 3 drives the sprue on the positioning mold base 4 to move to the corresponding position of the cutting blade 7 at the bottom of the lifting platform 6. The pressure cutting mechanism can press down and fix the sprue in the groove of the positioning mold base 4 to ensure the stability of the cutting blade 7 in cutting the sprue. Through the inclined groove 101 on the base 1, the cut injection molded part falls into the inclined groove 101 through the unloading hole 301. Thus, the injection molded part can slide down the inclined surface of the inclined groove 101, realizing the sorting and unloading of the injection molded part and the sprue. Example 2:

[0026] Building upon Example 1, the following is a further step: The moving mechanism includes a lifting platform 6 with a vision sensor 8 fixedly connected to the side near the working platform 3, which automatically identifies the position of the water inlet on the positioning mold base 4. The ends of the column rods 5 are all fixedly connected to a top plate 9, and a telescopic cylinder 10 is connected through and fixedly connected to the top plate 9, which is controlled by the vision sensor 8 to drive the lifting platform 6 to move up and down reciprocally. The telescopic cylinder 10 is connected to the vision sensor 8 via a signal.

[0027] A fixing plate 22 is fixedly connected to one end of the base 1 near the working platform 3. A third spring 23 is fixedly connected to the opposite surface of the fixing plate 22 and the working platform 3 to guide the working platform 3 to move back to its original position. Inclined panels 11 are fixedly connected to both sides of the lifting platform 6 at symmetrical positions. Columnar blocks 12 are fixedly connected to both ends of the working platform 3 near the inclined panels 11 at symmetrical positions to guide the working platform 3 to move horizontally back and forth.

[0028] In use, the fixing plate 22 is fixedly supported on the base 1 by the fixing plate 22 provided on the base 1, and the third spring 23 provided on the fixing plate 22 can support the position of the work platform 3 so that the third spring 23 can pull the work platform 3 to move horizontally reset under its own elastic force.

[0029] The vision sensor 8 is fixedly supported on the lifting platform 6. A top plate 9 on the columnar rod 5, with a telescopic cylinder 10 mounted on it, provides fixed support to the top of the columnar rod 5. The output shaft of the telescopic cylinder 10 is fixedly connected to the lifting platform 6, enabling the cylinder to drive the lifting platform 6 to move up and down reciprocally along the outer contour of the columnar rod 5. The vision sensor 8 is a Keyence CV-X series sensor, such as the CV-X100. It identifies differences in the outline, color, or texture of the sprue and the main body through photography, thereby accurately locating its coordinates and angle. This is a well-known existing device in the art and will not be described further here. In actual use, such as Figure 1 and Figure 4 As shown, in the initial state, the vision sensor 8 is located on the top of the positioning mold base 4, and the vision sensor 8 is connected to the telescopic cylinder 10 via a signal. When the vision sensor 8 detects the position of the sprue inside the positioning mold base 4, the vision sensor 8 activates the telescopic cylinder 10, which enables the telescopic cylinder 10 to push the lifting platform 6 to complete one cycle of descent and ascent. The inclined plate 11 provided on the lifting platform 6 enables the lifting platform 6 to move synchronously with the inclined plate 11. The columnar block 12 provided on the working platform 3 is fixedly supported on the working platform 3. When the lifting platform 6 moves in the downward vertical direction, the columnar block 12 can pull the working platform 3 to move horizontally towards the bottom of the lifting platform 6 under the action of the inclined plate 11. Thus, the working platform 3 can move the positioning mold base 4 to the corresponding position of the bottom of the cutting blade 7. The cutting blade 7 is located on both sides of the positioning mold base 4. As the lifting platform 6 continues to move downward, the cutting blade 7 can cut off the sprue of the injection molded parts on both sides.

[0030] As the working platform 3 moves horizontally towards the bottom of the lifting platform 6, the third spring 23 is in a stretched state. When the lifting platform 6 moves upward to its limit position, the third spring 23 can pull the working platform 3 out of the bottom of the lifting platform 6 under its own elastic force, so that the external feeding equipment can place the sprue on the injection molded part into the groove of the positioning mold base 4. This process integrates "visual recognition, signal drive, and mechanical linkage", which solves the problem of traditional equipment relying on manual or fixed mechanical positioning, ensures the accuracy of the cutting position, and improves the automation and efficiency of sprue removal of injection molded parts. Example 3:

[0031] Building upon Example 2, the following is a further step: The pressing and cutting mechanism includes a cylindrical tube 13 that is connected to the lifting platform 6 and has a water supply port inserted through it. A pressure block 14 is fixedly connected to the outer contour of the bottom end of the cylindrical tube 13 to press down and fix the water port on the inner wall of the positioning mold base 4. A first spring 15 is fixedly connected to the opposite surface of the pressure block 14 and the lifting platform 6 to guide the pressure block 14 to reset and move.

[0032] In use, the cylindrical tube 13 on the lifting platform 6 and the pressure block 14 on the cylindrical tube 13 fix and support the pressure block 14 on the cylindrical tube 13. The cylindrical tube 13 can drive the pressure block 14 to move up and down and reciprocate on the lifting platform 6. The first spring 15 on the pressure block 14 can support the position of the pressure block 14. When the lifting platform 6 moves down and drives the pressure block 14 to abut against the positioning mold base 4, and the end of the sprue passes through the inner wall of the cylindrical tube 13, the lifting platform 6 moves down and squeezes the first spring 15. The cylindrical tube 13 extends upward, and the first spring 15 applies pressure to the pressure block 14, thereby pressing down and fixing the sprue in the groove of the positioning mold base 4. This provides a stable downward pressure for the sprue, effectively offsetting the vibration and displacement generated at the moment of cutting, realizing pressing before cutting, fundamentally preventing poor cut surface, residue or product damage caused by sprue shaking, and significantly improving the cutting quality and consistency. Example 4:

[0033] Building upon Example 3, the following is a further step: The lifting platform 6 is equipped with a clamping mechanism for clamping the internal water inlet of the cylindrical tube 13. The clamping mechanism includes fixed blocks 16 fixedly connected at symmetrical positions on both sides of the lifting platform 6 near the cylindrical tube 13. Movable rods 17 are connected to both fixed blocks 16 on both sides and are horizontally movable. Clamping blocks 18 for clamping the internal water inlet of the cylindrical tube 13 are fixedly connected to the opposite ends of the movable rods 17 on both sides.

[0034] On the opposite sides of the moving rods 17 on both sides and the opposite surface of the fixed block 16, there are fixed connections of a guide clamping block 18 and a second spring 19 that abuts against the outer contour of the cylindrical tube 13. The outer contours on both sides of the cylindrical tube 13 are provided with through holes 131 for the clamping block 18 to enter.

[0035] In use, the fixing block 16 on the lifting platform 6 is fixedly supported on the lifting platform 6, and the moving rod 17 on the fixing block 16 can move horizontally on the fixing block 16. The clamping block 18 and the second spring 19 on the moving rod 17 allow the second spring 19 to guide the clamping block 18 to abut against the outer contour of the cylindrical tube 13 under its own elastic force. Figure 6 and Figure 7 As shown, through the through hole 131 opened on the cylindrical tube 13, as the pressure block 14 presses down and pushes the cylindrical tube 13 to extend upward, when the cylindrical tube 13 moves the through hole 131 to the corresponding position of the clamping block 18, the moving rod 17 can push the clamping blocks 18 on both sides to move towards each other to the inner wall of the cylindrical tube 13 under the action of the second spring 19 and clamp the internal gate. The clamping block 18 is engaged with the inner wall of the through hole 131. As the lifting platform 6 moves upward to reset, the clamping block 18 can pull the gate away from the inner wall of the positioning mold base 4, realizing automatic demolding. This avoids the need for manual removal of the gate from the positioning mold base 4, which would affect the efficiency of gate removal of the injection molded part and ensure the continuity of gate removal. Example 5:

[0036] Building upon Example 4, the following is a further step: The lifting platform 6 is equipped with a guide clamping block 18 to release the internal water inlet of the cylindrical tube 13 into a feeding mechanism. The feeding mechanism includes lifting rods 20 that are symmetrically connected to both sides of the top of the lifting platform 6 and can be raised and lowered. The bottom ends of the lifting rods 20 on both sides are rotatably connected to adjusting rods 21 that pull moving rods 17 to move back and forth. The bottom ends of the adjusting rods 21 on both sides are respectively rotatably connected to the adjacent moving rod 17 on one side.

[0037] The working platform 3 is rotatably connected to a receiving tray 24 for classifying and discharging sprues on one side near the lifting platform 6. Rectangular frames 25 are fixedly connected to both sides of the bottom of the receiving tray 24. Support blocks 26 for guiding the receiving tray 24 to flip and discharge materials are fixedly connected to both sides of the base 1 near the receiving tray 24. The ends of the support blocks 26 on both sides are respectively connected to the inner wall of the adjacent rectangular frame 25.

[0038] In use, the lifting rod 20 on the lifting platform 6 can move up and down reciprocally on the lifting platform 6. The adjusting rod 21 on the lifting rod 20 allows its two ends to be rotatably supported on the lifting rod 20 and the moving rod 17, respectively. The receiving tray 24 on the working platform 3 allows it to be rotatably supported on the working platform 3. The rectangular frame 25 on the receiving tray 24 and the support block 26 on the base 1 allow the support block 26 to extend through to the inner wall of the rectangular frame 25 and be movably connected. Figure 2 , Figure 4 and Figure 5 As shown, the support block 26 can support the horizontal state of the docking tray 24.

[0039] like Figures 6-8 As shown, when the moving rod 17 pushes the clamping block 18 to move towards the inner wall of the cylindrical tube 13 and clamps the water outlet, the adjusting rod 21, under the action of the moving rod 17, can push the lifting rod 20 to extend towards the top of the lifting platform 6. When the lifting platform 6 moves upward to reset, the third spring 23 pulls the working platform 3 to move out of the bottom of the lifting platform 6. At the same time, the working platform 3 can pull the receiving tray 24 to move to the bottom of the lifting platform 6. When the lifting platform 6 moves upward to the limit position, the end of the lifting rod 20 abuts against the top plate 9 and moves downward to reset. Thus, under the action of the lifting rod 20, the adjusting rod 21 can pull the moving rods 17 on both sides to move in opposite directions. At the same time, the clamping block 18 moves out of the inner wall of the cylindrical tube 13 and releases the water outlet under the pull of the moving rod 17. The first spring 15 is in a compressed state, and the first spring 1 5. Under its own elastic force, the pressure block 14 is pushed to quickly reset in the downward vertical direction, which enables the pressure block 14 to vibrate and drop the sprue inside the cylindrical tube 13 onto the receiving tray 24. As the working platform 3 moves towards the bottom of the lifting platform 6 to the limit position, and the end of the receiving tray 24 near the working platform 3 moves above the support block 26, the support block 26 pulls the end of the receiving tray 24 away from the working platform 3 under the leverage action to flip it downward. The sprue on the receiving tray 24 slides off, and the injection molded part slides off through the discharge hole 301 and the inclined groove 101 on the other side. This realizes the classification and discharge of the removed sprue and injection molded part, ensuring the continuity of the sprue removal equipment. The whole process does not require manual sorting, realizing the efficient and thorough separation of injection molded part and sprue. It solves the problems of product mixing and time-consuming and labor-intensive subsequent sorting in the background technology, and greatly improves the overall operation efficiency.

[0040] A process for injection molding of plastic housings and automatic identification and removal of sprue marks includes the following steps: S1. Automatic identification of water inlet position: The visual sensor 8 detects the position of the water inlet inside the positioning mold base 4 and activates the telescopic cylinder 10, so that the telescopic cylinder 10 can push the lifting platform 6 to complete one cycle of lowering and raising. S2. Moving worktable: When the lifting platform 6 moves in the downward vertical direction, and the cylindrical block 12 can pull the work platform 3 to move horizontally towards the bottom of the lifting platform 6 under the action of the inclined plate 11, the work platform 3 can move the positioning mold base 4 to the corresponding position of the bottom of the cutting blade 7. S3, Pressing and cutting the sprue: When the lifting platform 6 moves down and drives the pressing block 14 to abut against the positioning mold base 4, and the end of the sprue passes through the inner wall of the cylindrical tube 13, the lifting platform 6 moves down to squeeze the first spring 15, and the cylindrical tube 13 extends upward. Then the first spring 15 applies pressure to the pressing block 14, thereby pressing down and fixing the sprue in the groove of the positioning mold base 4, ensuring the stability of the cutting blade 7 in cutting the sprue; S4. Demolding operation: As the pressure block 14 presses down and pushes the cylindrical tube 13 to extend upward, when the cylindrical tube 13 moves the through hole 131 to the corresponding position of the clamping block 18, the moving rod 17 can push the clamping blocks 18 on both sides to move towards each other to the inner wall of the cylindrical tube 13 and clamp the internal gate. When the lifting platform 6 moves upward to reset, the clamping block 18 can pull the gate away from the inner wall of the positioning mold base 4, thus realizing automatic demolding. S5. Sorting and unloading: When the lifting platform 6 moves upward to reset, the working platform 3 can simultaneously pull the receiving tray 24 to the bottom of the lifting platform 6. As the lifting platform 6 moves upward to its limit position, the adjusting rod 21, under the action of the lifting rod 20, can pull the moving rods 17 on both sides and the clamping block 18 to move in opposite directions and release the clamp on the internal water outlet of the cylindrical tube 13, so that the pressure block 14 can shake and drop the internal water outlet of the cylindrical tube 13 onto the receiving tray 24.

[0041] Furthermore, the existing equipment can automatically classify and unload sprues and products during actual use, making it convenient to use and superior to traditional products.

[0042] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for injection molding of plastic housings and automatic identification and removal of sprue marks, characterized in that: The system includes a base (1), on which slide rails (2) are fixedly connected at symmetrical positions on both sides. A working platform (3) is horizontally connected to the slide rails (2) on both sides. A positioning mold base (4) for supporting the sprue of the injection molded part is fixedly connected to the working platform (3). A discharge hole (301) for sorting and discharging the injection molded part and the sprue is opened at symmetrical positions on both sides of the working platform (3). An inclined groove (101) for the injection molded part to slide and fall is opened on the base (1). The base (1) is far away from the workpiece. Two symmetrically placed columnar rods (5) are fixedly connected to the two sides of one end of the working platform (3). The outer contour of the columnar rods (5) on both sides is connected to a lifting platform (6) that moves up and down. The lifting platform (6) is fixedly connected to the two sides of the center of the lifting platform (6) with a cutting blade (7) for cutting off the sprue. The lifting platform (6) is provided with a moving mechanism that automatically identifies the position of the sprue on the positioning mold base (4) and drives the working platform (3) to move, and a pressing and cutting mechanism for the cutting blade (7) to cut off the sprue.

2. The equipment for injection molding of plastic shells and automatic identification and removal of sprue marks according to claim 1, characterized in that: The moving mechanism includes a lifting platform (6) with a vision sensor (8) fixedly connected to the side near the working platform (3) to automatically identify the position of the water inlet of the positioning mold base (4). The ends of the column rods (5) are all fixedly connected to a top plate (9), and a telescopic cylinder (10) is connected through and fixedly connected to the top plate (9) for the vision sensor (8) to control and drive the lifting platform (6) to move up and down. The telescopic cylinder (10) and the vision sensor (8) are connected by a signal.

3. The equipment for injection molding of plastic shells and automatic identification and removal of sprue marks according to claim 2, characterized in that: A fixed plate (22) is fixedly connected to one end of the base (1) near the working platform (3). A third spring (23) is fixedly connected to the opposite surface of the fixed plate (22) and the working platform (3) to guide the working platform (3) to move back to its original position. Inclined panels (11) are fixedly connected to both sides of the lifting platform (6). Columnar blocks (12) are fixedly connected to both ends of the working platform (3) near the inclined panel (11) to guide the working platform (3) to move horizontally back and forth.

4. The equipment for injection molding of plastic shells and automatic identification and removal of sprue marks according to claim 1, characterized in that: The pressing and cutting mechanism includes a cylindrical tube (13) that is connected to the lifting platform (6) and has a water inlet inserted through it. A pressure block (14) is fixedly connected to the outer contour of the bottom end of the cylindrical tube (13) to press down and fix the water inlet on the inner wall of the positioning mold base (4). A first spring (15) is fixedly connected to the opposite surface of the pressure block (14) and the lifting platform (6) to guide the pressure block (14) to reset and move.

5. The equipment for injection molding of plastic shells and automatic identification and removal of sprue marks according to claim 4, characterized in that: The lifting platform (6) is provided with a clamping mechanism for clamping the water inlet inside the cylindrical tube (13). The clamping mechanism includes fixed blocks (16) fixedly connected to both sides of the lifting platform (6) near the cylindrical tube (13). Movable rods (17) are connected to both fixed blocks (16) on both sides and moved horizontally. Clamping blocks (18) for clamping the water inlet inside the cylindrical tube (13) are fixedly connected to the opposite ends of the movable rods (17) on both sides.

6. The equipment for injection molding of plastic shells and automatic identification and removal of sprue marks according to claim 5, characterized in that: On the opposite sides of the moving rods (17) on both sides and the opposite surfaces of the fixed block (16), there are fixed connections of the guide clamping block (18) and the second spring (19) that abuts against the outer contour of the cylindrical tube (13). The outer contours on both sides of the cylindrical tube (13) are provided with through holes (131) for the clamping block (18) to enter.

7. The equipment for injection molding of plastic shells and automatic identification and removal of sprue marks according to claim 6, characterized in that: The lifting platform (6) is provided with a guide clamping block (18) to release the internal water inlet of the cylindrical tube (13) into a feeding mechanism. The feeding mechanism includes lifting rods (20) that are symmetrically connected to both sides of the top of the lifting platform (6) and can move up and down. The bottom ends of the lifting rods (20) on both sides are rotatably connected to an adjusting rod (21) that pulls the moving rod (17) to move back and forth. The bottom ends of the adjusting rods (21) on both sides are rotatably connected to the moving rod (17) on the adjacent side.

8. The equipment for injection molding of plastic shells and automatic identification and removal of sprue marks according to claim 7, characterized in that: The working platform (3) is rotatably connected to a receiving tray (24) for classifying and discharging sprues on one side of the lifting platform (6). Rectangular frames (25) are fixedly connected to both sides of the bottom of the receiving tray (24). Support blocks (26) for guiding the receiving tray (24) to flip and discharge materials are fixedly connected to both sides of the base (1) near the receiving tray (24). The ends of the support blocks (26) on both sides are respectively connected to the inner wall of the adjacent rectangular frame (25).

9. A process for injection molding of plastic housings and automatic identification and removal of sprue marks, applied to the equipment for injection molding of plastic housings and automatic identification and removal of sprue marks as described in any one of claims 1-8, comprising the following steps: S1. Automatically identify the water inlet position: The visual sensor (8) detects the water inlet position inside the positioning mold base (4) and starts the telescopic cylinder (10), so that the telescopic cylinder (10) can push the lifting platform (6) to complete a cycle of descent and ascent; S2, Moving worktable: When the lifting platform (6) moves in the downward vertical direction, and the cylindrical block (12) is able to pull the work platform (3) to move horizontally towards the bottom of the lifting platform (6) under the action of the inclined plate (11), so that the work platform (3) can move the positioning mold base (4) to the corresponding position of the bottom of the cutting blade (7). S3, Press-cut sprue: When the lifting platform (6) moves down and drives the pressure block (14) to abut against the positioning mold base (4), and the end of the sprue passes through the inner wall of the cylindrical tube (13), the lifting platform (6) moves down to squeeze the first spring (15), and the cylindrical tube (13) extends upward. Then the first spring (15) applies pressure to the pressure block (14), thereby pressing down and fixing the sprue in the groove of the positioning mold base (4) to ensure the stability of the cutting blade (7) in cutting the sprue; S4, Demolding operation: As the pressure block (14) presses down and pushes the cylindrical tube (13) upward, when the cylindrical tube (13) moves the through hole (131) to the corresponding position of the clamping block (18), the moving rod (17) can push the clamping blocks (18) on both sides to move towards each other to the inner wall of the cylindrical tube (13) and clamp the internal gate. When the lifting platform (6) moves upward to reset, the clamping block (18) can pull the gate away from the inner wall of the positioning mold base (4), thus realizing automatic demolding. S5, sorting and unloading: When the lifting platform (6) moves upward to reset, the working platform (3) can pull the receiving tray (24) to the bottom of the lifting platform (6). When the lifting platform (6) moves upward to the limit position, the adjusting rod (21) can pull the moving rods (17) on both sides and the clamping block (18) to move in opposite directions under the action of the lifting rod (20) and release the clamping of the internal water outlet of the cylindrical tube (13). The pressure block (14) can shake the internal water outlet of the cylindrical tube (13) and drop it onto the receiving tray (24).

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