Plastic child dining chair processing injection molding equipment and injection molding process thereof

Abstract

The present application relates to a kind of plastic children's dining chair processing injection molding equipment and its injection molding process, it is related to injection molding process, including rack, extruder, mold moving system, mold system, workpiece transfer system and flexible clamping system, flexible clamping system includes clamping frame and several flexible clamping devices, clamping frame is installed on workpiece transfer system, each flexible clamping device includes workpiece suction device, clamping fixed device, sliding control device and air nozzle, clamping fixed device is installed on clamping frame, workpiece suction device is slidably installed on clamping fixed device, sliding control device is slidably installed on workpiece suction device, air passage is provided in workpiece suction device, sliding control device extends to air passage, clamping fixed device is provided with ratchet section, sliding control device is directed to ratchet section, when sliding control device presses ratchet section, ratchet section limits clamping fixed device to slide in the direction away from workpiece suction device, can adapt to different workpiece suction demand.

Description

Technical Field

[0001] This invention relates to the field of plastic injection molding technology, and in particular to a plastic children's dining chair injection molding equipment and its injection molding process. Background Technology

[0002] The injection molding process for children's dining chair accessories involves several key steps, including raw material preparation and plasticizing, mold temperature control, injection and molding, cooling and post-processing.

[0003] The raw materials must be polyethylene or polypropylene plastic granules. Vacuum heating treatment is used to remove moisture and impurities. The injection molding machine barrel and hot runner are heated to the same temperature range simultaneously to ensure uniform melting of the raw materials. The molten raw materials are injected into the mold through the hot runner. During this process, a stable mold temperature must be maintained. The injection pressure and speed need to be adjusted according to the product structure to avoid short shots or flow marks. After molding, the product needs to be cooled in a cooling water tank to ensure that it sets. Post-processing includes removing flash, installing stool legs, and other steps to finally complete the assembly of the children's dining chair.

[0004] Children's high chairs have high comfort requirements, and their parts are entirely composed of curved surfaces. When existing injection molding machines use suction cups for demolding, the suction cup position needs to be adjusted and fixed first so that the suction cup position is adapted to the position where the part can be picked up. This adjustment process makes the production inflexible. The suction cup demolding equipment can only be adapted to one molding machine and cannot be adapted to demolding of multiple molding machines at the same time. Summary of the Invention

[0005] To overcome the technical defects of the existing technology, the present invention provides a plastic children's dining chair processing injection molding equipment and injection molding process, which can adapt to different workpiece suction requirements.

[0006] The technical solution adopted in this invention is:

[0007] A plastic children's dining chair injection molding equipment includes a frame, an extruder, a mold moving system, a mold system, a workpiece transfer system, and a flexible clamping system. The extruder is mounted on the frame, the mold moving system is mounted on the frame, the mold system is mounted on the mold moving system, the workpiece transfer system is mounted on the frame, and the flexible clamping system is mounted on the workpiece transfer system. The flexible clamping system includes a clamping frame and several flexible clamping devices. The clamping frame is mounted on the workpiece transfer system. Each flexible clamping device includes a workpiece suction device, a clamping and fixing device, a sliding control device, and an air nozzle. The clamping and fixing device is mounted on the clamping frame. The workpiece suction device is slidably mounted on the clamping and fixing device. The air nozzle is mounted on the workpiece suction device. The sliding control device is slidably mounted on the workpiece suction device. The workpiece suction device has an air passage. The sliding direction of the workpiece suction device on the clamping and fixing device is parallel to the air passage. The sliding direction of the sliding control device on the workpiece suction device is perpendicular to the air passage. The sliding control device extends to the air passage. The clamping and fixing device has a ratchet section. The sliding control device points to the ratchet section. When the sliding control device presses against the ratchet section, the ratchet section prevents the clamping and fixing device from sliding away from the workpiece suction device.

[0008] Preferably, the extruder points towards the die system.

[0009] Preferably, the mold moving system includes a sliding mold plate, the mold system includes a closing moving plate and a mold stationary plate, the closing moving plate is mounted on the sliding mold plate to achieve sliding, the mold stationary plate is mounted on the frame, the closing moving plate and the mold stationary plate close together to achieve molding, the sliding mold plate is slid by a hydraulic cylinder, and the mold system is mounted on the sliding mold plate.

[0010] Preferably, the workpiece transfer system includes a workpiece longitudinal transfer device, a workpiece transverse transfer device, and a workpiece lifting device. The workpiece longitudinal transfer device is mounted on the frame, the workpiece transverse transfer device is mounted on the workpiece longitudinal transfer device, the workpiece lifting device is mounted on the workpiece transverse transfer device, and the clamping frame is mounted on the workpiece lifting device.

[0011] Preferably, the workpiece suction device includes a suction cup and a suction block. The suction block is slidably mounted on the clamping and fixing device. The suction cup is mounted on the lower side of the suction block and is connected to the ventilation channel. The air nozzle is mounted on the suction block and is connected to the ventilation channel.

[0012] Preferably, the clamping and fixing device includes a sliding tube and two fixing nuts. The sliding tube passes through the clamping frame and is mounted on the clamping frame by the two fixing nuts. The lower side of the sliding tube slides against the suction block of the workpiece suction device, and the ratchet section is provided on the sliding tube.

[0013] Preferably, the sliding control device includes a control piston, a locking rod, and a balance rod. The locking rod and the balance rod are respectively mounted on the control piston via a connecting plate. The locking rod and the balance rod are parallel to each other and slide along the workpiece suction device. A reset spring is provided between the connecting plate and the workpiece suction device.

[0014] The injection molding process for plastic children's dining chairs utilizes a specific injection molding equipment and includes the following steps:

[0015] S1: The mold moving system drives the mold system to close the mold;

[0016] S2: The extruder extrudes molten material into the die system;

[0017] S3: The mold moving system drives the mold system to open the mold;

[0018] S4: The workpiece transfer system drives the flexible clamping system to approach the workpiece. Each workpiece picking device slides along the clamping and fixing device according to the workpiece surface contour until each workpiece picking device is in contact with the workpiece. The workpiece picking device is driven by the workpiece transfer system to bring the workpiece out. The sliding control device presses down on the ratchet section to lock the workpiece picking device and the clamping and fixing device.

[0019] The beneficial effects of this invention are:

[0020] The extruder is mounted on the frame to extrude molten material. The die moving system is mounted on the frame to close the die. The die system is mounted on the die moving system. The extruder extrudes the molten material into the closed die system for forming. The workpiece transfer system is mounted on the frame. The flexible clamping system is mounted on the workpiece transfer system to transfer the workpiece.

[0021] The flexible clamping system includes a clamping frame and several flexible clamping devices. The clamping frame is mounted on the workpiece transfer system. Each flexible clamping device includes a workpiece picking device, a clamping fixing device, a sliding control device, and an air nozzle. The clamping fixing device is mounted on the clamping frame. The workpiece picking device is slidably mounted on the clamping fixing device. The air nozzle is mounted on the workpiece picking device. The sliding control device is slidably mounted on the workpiece picking device. The workpiece picking device has an air passage. The sliding direction of the workpiece picking device on the clamping fixing device is parallel to the air passage. The sliding direction of the sliding control device on the workpiece picking device is perpendicular to the air passage. The sliding control device extends into the air passage, thereby causing the sliding control device 623 to slide under the control of the air pressure in the air passage 6211.

[0022] The clamping and fixing device is equipped with a ratchet section. The sliding control device points towards the ratchet section. When a workpiece needs to be picked up, negative pressure is introduced into the air passage to create suction from the air nozzle. At the same time, the sliding control device presses down on the ratchet section. When the sliding control device presses down on the ratchet section, the ratchet section prevents the clamping and fixing device from sliding away from the workpiece picking device, thus ensuring the position of the workpiece picking device. The workpiece transfer system drives the flexible clamping system to approach the workpiece. Each workpiece picking device slides along the clamping and fixing device according to the workpiece surface contour until each workpiece picking device is in contact with the workpiece. The workpiece picking device is driven by the workpiece transfer system to carry the workpiece out. The sliding control device presses down on the ratchet section, thus locking the workpiece picking device and the clamping and fixing device, thereby realizing the transfer of different workpieces and making the production flexible. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the flexible clamping device.

[0025] Figure 3 for Figure 1 Enlarged diagram of point A in the middle.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Rack;

[0028] 2. Extruder;

[0029] 3. Mold moving system;

[0030] 4. Mold system;

[0031] 5. Workpiece transfer system; 51. Workpiece longitudinal transfer device; 52. Workpiece transverse transfer device; 53. Workpiece lifting device;

[0032] 6. Flexible clamping system;

[0033] 61. Mounting clamp;

[0034] 62. Flexible clamping device; 621. Workpiece suction device; 6211. Ventilation channel; 6212. Suction cup; 6213. Suction block; 622. Clamping and fixing device; 6221. Sliding tube; 6222. Fixing nut; 62211. Ratchet section;

[0035] 623. Sliding control device; 6231. Control piston; 6232. Locking rod; 6233. Balance bar;

[0036] 624. Air valve. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings:

[0038] like Figure 1 — Figure 3 As shown, this embodiment provides a plastic children's dining chair injection molding equipment, including a frame 1, an extruder 2, a mold moving system 3, a mold system 4, a workpiece transfer system 5, and a flexible clamping system 6. The extruder 2 is mounted on the frame 1 to extrude molten material. The mold moving system 3 is mounted on the frame 1 to close the mold. The mold system 4 is mounted on the mold moving system 3. The extruder 2 extrudes the molten material into the closed mold system 4 for molding. The workpiece transfer system 5 is mounted on the frame 1, and the flexible clamping system 6 is mounted on the workpiece transfer system 5 to transfer the workpiece.

[0039] Specifically, the flexible clamping system 6 includes a clamping frame 61 and several flexible clamping devices 62. The clamping frame 61 is mounted on the workpiece transfer system 5. Each flexible clamping device 62 includes a workpiece picking device 621, a clamping fixing device 622, a sliding control device 623, and an air nozzle 624. The clamping fixing device 622 is mounted on the clamping frame 61. The workpiece picking device 621 is slidably mounted on the clamping fixing device 622. The air nozzle 624 is mounted on the workpiece picking device 621. The sliding control device 621... 3. It is slidably mounted on the workpiece suction device 621. The workpiece suction device 621 is provided with a ventilation channel 6211. The sliding direction of the workpiece suction device 621 on the clamping and fixing device 622 is parallel to the ventilation channel 6211. The sliding direction of the sliding control device 623 on the workpiece suction device 621 is perpendicular to the ventilation channel 6211. The sliding control device 623 extends to the ventilation channel 6211, so that the sliding control device 623 slides under the control of the air pressure in the ventilation channel 6211.

[0040] Specifically, the clamping and fixing device 622 is equipped with a ratchet section 62211, and the sliding control device 623 points towards the ratchet section 62211. When a workpiece needs to be picked up, a negative pressure is introduced into the air passage 6211, causing the air nozzle 624 to have suction. At the same time, the sliding control device 623 presses down on the ratchet section 62211. When the sliding control device 623 presses down on the ratchet section 62211, the ratchet section 62211 prevents the clamping and fixing device 622 from sliding away from the workpiece picking device 621, thereby ensuring the workpiece is picked up. Positioning device 621, workpiece transfer system 5 drives flexible clamping system 6 to approach workpiece, each workpiece picking device 621 slides along clamping and fixing device 622 according to the workpiece surface contour until each workpiece picking device 621 is in contact with workpiece, workpiece picking device 621 carries workpiece out under the drive of workpiece transfer system 5, sliding control device 623 presses down ratchet section 62211 to lock workpiece picking device 621 and clamping and fixing device 622, thereby realizing the transfer of different workpieces and making production flexible.

[0041] Specifically, the extruder 2 is directed to the mold system 4 and is adapted to the pre-set gating port of the mold system 4 to supply molten material. The extruder 2 is a commercially available screw extruder.

[0042] Specifically, the mold moving system 3 includes a sliding mold plate, and the mold system 4 includes a closing moving plate and a mold stationary plate. The closing moving plate is mounted on the sliding mold plate to achieve sliding, and the mold stationary plate is mounted on the frame 1. The mold closing moving plate and the mold stationary plate close together to achieve forming. The sliding mold plate is slid by a hydraulic cylinder. The mold system 4 is mounted on the sliding mold plate to achieve mold closing of the mold system 4.

[0043] Specifically, the workpiece transfer system 5 includes a workpiece longitudinal transfer device 51, a workpiece transverse transfer device 52, and a workpiece lifting device 53. The workpiece longitudinal transfer device 51 is mounted on the frame 1, the workpiece transverse transfer device 52 is mounted on the workpiece longitudinal transfer device 51, the workpiece lifting device 53 is mounted on the workpiece transverse transfer device 52, and the clamping frame 61 is mounted on the workpiece lifting device 53 to realize the movement of the clamping frame 61.

[0044] Specifically, the workpiece suction device 621 includes a suction cup 6212 and a suction block 6213. The suction block 6213 is slidably mounted on the clamping and fixing device 622. The suction cup 6212 is mounted on the lower side of the suction block 6213 and is connected to the ventilation channel 6211. An air nozzle 624 is mounted on the suction block 6213 and is connected to the ventilation channel 6211 to achieve a vacuum in the ventilation channel 6211, thereby enabling the suction cup 6212 to have adsorption capacity.

[0045] Specifically, the clamping and fixing device 622 includes a sliding tube 6221 and two fixing nuts 6222. The sliding tube 6221 passes through the clamping frame 61 and is mounted on the clamping frame 61 by the two fixing nuts 6222. The lower side of the sliding tube 6221 slides against the suction block 6213 of the workpiece suction device 621. A ratchet section 62211 is provided on the sliding tube 6221. The ratchet section 62211 causes the workpiece suction device to be pressed against the ratchet section 62211 when the sliding control device 623 is pressed against the ratchet section 62211. The sliding tube 6221 and the clamping and fixing device 622 can be close to each other, but not far apart. That is to say, the sliding tube 6221 can retract with the suction block 6213 but cannot be far apart. This ensures the tension transmission between the suction block 6213 and the sliding tube 6221 when the suction cup 6212 is attached to the workpiece and suctions it. In order to prevent the suction block 6213 from detaching from the sliding tube 6221, the sliding tube 6221 is provided with a limiting groove, and the suction block 6213 is provided with a limiting protrusion that matches the limiting groove.

[0046] This embodiment provides a method for a workpiece suction device 621 to simultaneously pick up workpieces from two forming machines. In order to accommodate the workpieces of both forming machines at the same time, the positions of each clamping and fixing device 622 need to be determined according to the suction positions of the two forming machines. An air nozzle 624 adapted to the corresponding suction cup 6212 is connected to an electromagnetic air valve. An electric control switch is provided between the sliding tube 6221 and the suction block 6213. When picking up a workpiece from one of the forming machines, the sliding tube 6221 that is in motion drives the corresponding electric control switch to operate, controlling the corresponding electromagnetic air valve to ventilate, so that the corresponding suction cup 6212 can ventilate and pick up the workpiece. The other suction cups 6212 do not participate in the picking up, thereby realizing the transfer of different workpieces.

[0047] Specifically, the sliding control device 623 includes a control piston 6231, a locking rod 6232, and a balance rod 6233. The locking rod 6232 and the balance rod 6233 are respectively mounted on the control piston 6231 through a connecting plate. The locking rod 6232 and the balance rod 6233 are parallel to each other and slide along the workpiece suction device 621. A reset spring is provided between the connecting plate and the workpiece suction device 621 to reset the locking rod 6232. After the air passage 6211 is ventilated, it drives the control piston 6231 to slide, thereby realizing the sliding of the locking rod 6232. The balance rod 6233 is used to maintain the stability of the control piston 6231 and prevent the control piston 6231 from deflecting.

[0048] The injection molding process for plastic children's high chairs, using injection molding equipment, includes the following steps:

[0049] S1: Mold moving system 3 drives mold system 4 to close the mold;

[0050] S2: Extruder 2 extrudes molten material into mold system 4;

[0051] S3: Mold moving system 3 drives mold system 4 to open the mold;

[0052] S4: The workpiece transfer system 5 drives the flexible clamping system 6 to approach the workpiece. Each workpiece picking device 621 slides along the clamping and fixing device 622 according to the workpiece surface contour until each workpiece picking device 621 is in contact with the workpiece. The workpiece picking device 621 carries the workpiece out under the drive of the workpiece transfer system 5. The sliding control device 623 presses down the ratchet section 62211 and locks the workpiece picking device 621 and the clamping and fixing device 622.

[0053] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A plastic children's dining chair injection molding equipment, characterized in that, The system includes a frame, an extruder, a die moving system, a die system, a workpiece transfer system, and a flexible clamping system. The extruder is mounted on the frame, the die moving system is mounted on the frame, the die system is mounted on the die moving system, the workpiece transfer system is mounted on the frame, and the flexible clamping system is mounted on the workpiece transfer system. The flexible clamping system includes a clamping frame and several flexible clamping devices. The clamping frame is mounted on the workpiece transfer system. Each flexible clamping device includes a workpiece picking device, a clamping fixing device, a sliding control device, and an air nozzle. The clamping fixing device is mounted on the clamping frame. The workpiece picking device is slidably mounted on the clamping fixing device. The air nozzle is mounted on the workpiece picking device. The sliding control device is slidably mounted on the workpiece picking device. The workpiece picking device has a ventilation channel, and the sliding direction of the workpiece picking device on the clamping fixing device is parallel to the ventilation channel. The sliding control device slides perpendicularly to the ventilation channel on the workpiece suction device. The sliding control device extends to the ventilation channel. The clamping and fixing device is provided with a ratchet section. The sliding control device points towards the ratchet section. When the sliding control device presses against the ratchet section, the ratchet section prevents the clamping and fixing device from sliding away from the workpiece suction device. The clamping and fixing device includes a sliding tube and two fixing nuts. The sliding tube passes through the clamping frame and is mounted on the clamping frame by the two fixing nuts. The lower side of the sliding tube slides against the suction block of the workpiece suction device. The ratchet section is provided on the sliding tube. The sliding control device includes a control piston, a locking rod, and a balance rod. The locking rod and the balance rod are respectively mounted on the control piston through a connecting plate. The locking rod and the balance rod are parallel to each other and slide along the workpiece suction device. A return spring is provided between the connecting plate and the workpiece suction device.

2. The injection molding equipment for processing plastic children's dining chairs according to claim 1, characterized in that, The extruder points to the die system.

3. The injection molding equipment for processing plastic children's dining chairs according to claim 1, characterized in that, The mold moving system includes a sliding mold plate. The mold system includes a closing moving plate and a mold stationary plate. The closing moving plate is mounted on the sliding mold plate to achieve sliding. The mold stationary plate is mounted on the frame. The mold closing moving plate and the mold stationary plate close together to achieve molding. The sliding mold plate is slidable by a hydraulic cylinder.

4. The injection molding equipment for processing plastic children's dining chairs according to claim 1, characterized in that, The workpiece transfer system includes a workpiece longitudinal transfer device, a workpiece transverse transfer device, and a workpiece lifting device. The workpiece longitudinal transfer device is mounted on the frame, the workpiece transverse transfer device is mounted on the workpiece longitudinal transfer device, the workpiece lifting device is mounted on the workpiece transverse transfer device, and the clamping frame is mounted on the workpiece lifting device.

5. The injection molding equipment for processing plastic children's dining chairs according to claim 1, characterized in that, The workpiece suction device includes a suction cup and a suction block. The suction block is slidably mounted on a clamping and fixing device. The suction cup is mounted on the lower side of the suction block and is connected to a ventilation channel. The air nozzle is mounted on the suction block and is connected to the ventilation channel.

6. A plastic children's dining chair processing injection molding process, using the plastic children's dining chair processing injection molding equipment as described in claim 1, characterized in that, Includes the following steps: S1: The mold moving system drives the mold system to close the mold; S2: The extruder extrudes molten material into the die system; S3: The mold moving system drives the mold system to open the mold; S4: The workpiece transfer system drives the flexible clamping system to approach the workpiece. Each workpiece picking device slides along the clamping and fixing device according to the workpiece surface contour until each workpiece picking device is in contact with the workpiece. The workpiece picking device is driven by the workpiece transfer system to bring the workpiece out. The sliding control device presses down on the ratchet section to lock the workpiece picking device and the clamping and fixing device.

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