Injection mold for plastic packaging box production

Abstract

The utility model discloses a kind of injection mould for plastic packaging box production, it is related to plastic packaging box production and processing technical field, including frame, the top of the frame is fixedly installed with first air cylinder, the output end of the first air cylinder is fixedly installed with top plate and penetrates frame.This utility model adopts the above structure, during the operation of this injection mould, first air cylinder drives upper die and lower die to close, injection molding is formed by injection tube, after opening mould, driving motor in stripping mechanism drives screw rod to make slider move up, stripping top block ejects packaging box from lower die, then the second air cylinder of pushing mechanism promotes pushing plate, packaging box is pushed to the automatic sliding of discharge guide plate, support rod ensures that top plate moves stably, rail frame and slider cooperate to ensure that stripping top group moves accurately, and the design of automatic stripping gets rid of artificial stripping, overall can be quickly and efficiently stripped, effectively improve the efficiency of the overall production and processing of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of plastic packaging box production and processing technology, and specifically relates to an injection mold for the production of plastic packaging boxes. Background Technology

[0002] Currently, in the field of modern packaging and packaging materials, plastic turnover boxes are widely used in various industries such as food, beverage, and logistics due to their durability, ease of cleaning, and reusability. From daily food storage and transportation to industrial product logistics turnover, various plastic turnover boxes provide reliable guarantees for the circulation of goods. Their production quality and efficiency are crucial. At present, most plastic packaging boxes are produced using mold forming technology. Chinese patent with announcement number "CN220362890U" discloses a plastic packaging box production mold that is easy to clean. Through the cooperation of various components, the automatic removal of scrap material after molding is realized, thereby improving production efficiency.

[0003] However, in practical applications, this mold still has significant defects. It lacks an automatic demolding and product discharge structure, and the molded plastic packaging boxes need to be removed manually, which not only consumes manpower but also prolongs the production cycle and cannot meet the needs of high-efficiency production. The cumbersome manual demolding and unloading process increases labor intensity and is prone to product damage, affecting production quality and efficiency. It can be seen that the existing plastic packaging box production mold is insufficient in terms of automation and practicality, and urgently needs to be improved in design to adapt to the high-efficiency and intelligent development trend of the modern packaging industry. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide an injection mold for the production of plastic packaging boxes, so as to solve the problems raised in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] An injection mold for producing plastic packaging boxes includes a frame, a first cylinder fixedly mounted on the top of the frame, a top plate fixedly mounted through the output end of the first cylinder, an upper mold fixedly mounted on the bottom of the top plate, a base frame fixedly mounted inside the bottom of the frame, a lower mold fixedly mounted on the top of the base frame, an injection tube fixedly mounted on one side of the top of the top plate, the output end of the injection tube communicating with the interior of the upper mold, a demolding mechanism fixedly mounted on the lower back of the frame, and a pushing mechanism fixedly mounted on one side of the top of the base frame.

[0007] The demolding mechanism includes a rail frame, which is fixedly installed in the middle of the back of the frame. A drive motor is fixedly installed at the bottom of the rail frame, and a lead screw is fixedly installed at the output end of the drive motor. A slider is threadedly connected to the outer surface of the lead screw, and the slider is slidably connected to the inside of the rail frame. A demolding top assembly is fixedly installed on the front of the slider.

[0008] As a preferred technical solution, the demolding top assembly includes a fixing plate, which is fixedly installed on the front of the slider. Demolding top rods are fixedly installed at the four corners of the top of the fixing plate, and demolding top blocks are fixedly installed through the lower mold at the top of the demolding top rods.

[0009] As a preferred technical solution, the outer surface corners of the frame are all rounded, the overall outer corners of the base frame are also rounded, and support rods are fixedly installed on both sides of the front end of the frame.

[0010] As a preferred technical solution, a support rod is fixedly installed at each of the four corners of the top of the top plate, and the top of the support rod penetrates through the top of the frame.

[0011] As a preferred technical solution, the pushing mechanism includes a side plate, which is fixedly installed on the lower side of one side of the frame. A second cylinder is fixedly installed at the front end of the side plate, and a pushing plate is fixedly installed through the output end of the second cylinder through the side plate.

[0012] As a preferred technical solution, a discharge guide plate is fixedly installed on the upper end of the side of the base frame away from the side plate, and the discharge guide plate is inclined as a whole.

[0013] As a preferred technical solution, the internal cavity of the rail frame is arranged in a cross shape when viewed from above, and the slider is also arranged in a cross shape when viewed from above.

[0014] In summary, the present invention has the following main advantages:

[0015] Firstly, when this injection mold is working, the first cylinder drives the upper mold and the lower mold to close, and the mold is formed through the injection tube. After the mold opens, the drive motor in the demolding mechanism drives the lead screw to move the slider upward. The demolding top block pushes the packaging box out of the lower mold. Then, the second cylinder of the ejector mechanism pushes the ejector plate to push the packaging box to the discharge guide plate for automatic sliding. The support rod ensures the stability of the top plate movement. The rail frame and the slider cooperate to ensure the precise movement of the demolding top group. At the same time, the automatic demolding design eliminates the need for manual demolding. The whole machine can quickly and efficiently demold, which effectively improves the overall production and processing efficiency of this equipment.

[0016] Secondly, the automated demolding and material ejection process of this mold replaces manual operation, shortens the production cycle, improves efficiency, and the uniform ejection of the demolding top block reduces product deformation. The material discharge guide plate avoids product damage. The rounded corner design reduces the risk of injury to operators and reduces safety accidents. The cooperation between the rail frame and the slider enhances the stability of the demolding mechanism and improves the working environment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 3 This is a side view structural diagram of the present invention;

[0020] Figure 4 This is a rear view schematic diagram of the demolding mechanism of this utility model;

[0021] Figure 5 This is a front view schematic diagram of the demolding mechanism of this utility model.

[0022] Reference numerals: 1. Frame; 2. First cylinder; 3. Top plate; 4. Upper mold; 5. Lower mold; 6. Injection tube; 7. Demolding mechanism; 71. Rail frame; 72. Drive motor; 73. Lead screw; 74. Slider; 75. Demolding ejector assembly; 751. Fixing plate; 752. Demolding ejector rod; 753. Demolding ejector block; 8. Pushing mechanism; 81. Side plate; 82. Second cylinder; 83. Pushing plate; 9. Support rod; 10. Support rod; 11. Discharge guide plate; 12. Base frame. Detailed Implementation

[0023] Example

[0024] refer to Figures 1 to 4 This embodiment of an injection mold for producing plastic packaging boxes includes a frame 1, a first cylinder 2 fixedly installed on the top of the frame 1, a top plate 3 fixedly installed through the output end of the first cylinder 2, an upper mold 4 fixedly installed at the bottom of the top plate 3, a base frame 12 fixedly installed at the bottom inside the frame 1, a lower mold 5 fixedly installed at the top of the base frame 12, an injection tube 6 fixedly installed on one side of the top of the top plate 3, the output end of the injection tube 6 being connected to the interior of the upper mold 4, a demolding mechanism 7 fixedly installed at the lower back of the frame 1, and a pushing mechanism 8 fixedly installed on one side of the top of the base frame 12.

[0025] The demolding mechanism 7 includes a rail frame 71, which is fixedly installed in the middle of the back of the frame 1. A drive motor 72 is fixedly installed at the bottom of the rail frame 71, and a lead screw 73 is fixedly installed at the output end of the drive motor 72. A slider 74 is threadedly connected to the outer surface of the lead screw 73. The slider 74 is slidably connected to the inside of the rail frame 71. A demolding top assembly 75 is fixedly installed on the front of the slider 74. In the production process of plastic packaging boxes, the working principle of this injection mold is as follows: First, the first cylinder 2 at the top of the frame 1 drives the output end to move the top plate 3 downward, so that the upper mold 4 fixed at the bottom of the top plate 3 and the lower mold 5 at the top of the base frame 12 close together. At this time, plastic raw material is injected into the upper mold 4 through the injection tube 6 to complete the injection molding. After the injection molding process is completed, the first cylinder 2 drives the top plate 3 to move the upper mold 4 upward to open the mold. At the same time, the drive motor 72 at the bottom of the rail frame 71 on the back of the frame 1 starts, driving... When the lead screw 73 rotates, since the lead screw 73 is threadedly connected to the slider 74 and the slider 74 is restricted to linear motion by the rail frame 71, the slider 74 slides upward along the rail frame 71, thereby driving the demolding top assembly 75 fixed on the front of the slider 74 to rise synchronously. The demolding top block 753 of the demolding top assembly 75 pushes the formed plastic packaging box out of the lower mold 5. Immediately afterwards, the pushing mechanism 8 on one side of the top of the base frame 12 is activated. The second cylinder 82 of the pushing mechanism 8 pushes the pushing plate 83 to push the demolded plastic packaging box onto the inclined discharge guide plate 11, so that it automatically slides down under the action of gravity to complete the discharge. Throughout the process, the supporting rods 10 at the four corners of the top plate 3 penetrate through the top of the frame 1 to ensure the stability of the movement of the top plate 3. The rounded corner design of the frame 1 and the base frame 12 avoids the operator from bumping into them. The cross-shaped structure of the rail frame 71 and the slider 74 ensures the accuracy and stability of the movement of the demolding top assembly 75.

[0026] refer to Figures 1-5The demolding top assembly 75 includes a fixed plate 751, which is fixedly installed on the front of the slider 74. Demolding ejector pins 752 are fixedly installed at the four corners of the top of the fixed plate 751. Demolding ejector pins 752 penetrate the lower mold 5 and are fixedly installed with demolding blocks 753. The outer surface corners of the frame 1 are rounded, and the overall outer corners of the base frame 12 are also rounded. Support rods 9 are fixedly installed on both sides of the front end of the frame 1. Support rods 10 are fixedly installed at the four corners of the top of the top plate 3, with the top of the support rods 10 penetrating the top of the frame 1. During the operation of this injection mold, when demolding is required, the drive motor 72 inside the rail frame 71 drives the lead screw 73 to rotate, causing the threaded slider 74 to slide upwards within the rail frame 71. The fixed plate 751 on the front of the slider 74... Simultaneously, the demolding ejector pins 752 and 753, fixed at the four corners of the top of the fixed plate 751, also rise together. The demolding ejector pins 753 penetrate the lower mold 5 and smoothly eject the molded plastic packaging box, achieving demolding. The rounded corner design of the frame 1 and the base frame 12 can prevent operators from bumping into things when working around the equipment, playing a safety protection role. The support rods 9 on both sides of the front end inside the frame 1 provide reinforcement and support for the overall structure, enhancing the stability of the equipment. The support rods 10 at the four corners of the top plate 3 penetrate the top of the frame 1. During the process of the first cylinder 2 driving the top plate 3 to move the upper mold 4 up and down, the support rods 10 can ensure the stability and accuracy of the movement of the top plate 3, making the mold closing and opening actions of the upper mold 4 and the lower mold 5 more precise, ensuring the smooth progress of injection molding and subsequent demolding processes.

[0027] refer to Figures 1-3The ejector mechanism 8 includes a side plate 81, which is fixedly installed on the lower side of the frame 1. A second cylinder 82 is fixedly installed on the front end of the side plate 81. The output end of the second cylinder 82 passes through the side plate 81 and is fixedly installed with an ejector plate 83. A discharge guide plate 11 is fixedly installed on the upper side of the base frame 12 away from the side plate 81. The discharge guide plate 11 is inclined. The internal cavity of the rail frame 71 is cross-shaped when viewed from above. The slider 74 is also cross-shaped when viewed from above. During the operation of this injection mold, when the demolding mechanism 7 ejects the molded plastic packaging box from the lower mold 5, the ejector mechanism 8 starts to operate, and the second cylinder 82 fixed on the side plate 81 on the lower side of the frame 1 is activated. Its output end pushes the pusher plate 83 to move away from the side plate 81, pushing the plastic packaging box located on the base frame 12 towards the inclined discharge guide plate 11, so that the packaging box slides down along the discharge guide plate 11 under the action of gravity to complete the unloading. During this process, the cross-shaped cavity inside the rail frame 71 cooperates with the cross-shaped structure of the slider 74 to ensure that the slider 74 slides smoothly in the rail frame 71, so that the demolding top group 75 accurately ejects the product, avoiding deviation or jamming, and ensuring the stability and reliability of the demolding process. At the same time, the coordinated action of the second cylinder 82 and the pusher plate 83 realizes the automatic discharge of the product, improving production efficiency. The frame 1 of this device is made of Q235 carbon steel with a wall thickness of 6-10mm and an outer surface The rounding radius at the corners is R10-R15mm. The base frame 12 is welded with 10#-16# channel steel, and the table thickness is 8-12mm. Both surfaces are powder-coated. The forming parts of the upper and lower molds 5 are made of P20 mold steel, and the mold frame is made of 45# steel. The surface roughness of the cavity is Ra0.8-Ra1.6. The rail frame 71 is made of 45# steel with a wall thickness of 5-8mm and an internal cross-shaped cavity size of 40mm×40mm. The slider 74 is made of T10 tool steel and surface hardened to HRC55-60. The lead screw 73 is a Tr32×6-8 trapezoidal thread. The ejector pin 752 has a diameter of Φ16-Φ25mm, is made of 40Cr and is chrome-plated. The second cylinder 82 of the pusher mechanism 8 The cylinder diameter is Φ40-Φ63mm, the stroke is 150-250mm, the pusher plate 83 is made of Q235 steel, 8-10mm thick, and has a 2mm thick polyurethane buffer layer on the surface; the discharge guide plate 11 is made of 304 stainless steel, 3-5mm thick, with an inclination angle of 30°-45°. In terms of power supply for electronic components, the drive motor 72 is a 57HS76-4004A stepper motor, powered by an AC220V to DC24V / 10A switching power supply, paired with a TB6600 driver, 1600 pulses / revolution microstepping; the first cylinder 2 and the second cylinder 82 are SC series standard cylinders, controlled by a DC24V 4V210-08 solenoid valve, with an air source pressure of 0.6-0.8MPa; the control system uses a Siemens S7-200SMARTCPUSR20 PLC, equipped with LJ12A3-4-Z / BX proximity switches and an MCGSTPC7062Ti touch screen; the main power supply is three-phase AC380V, and the control power supply is converted to DC24V via a switching power supply. The circuit includes a 10-20A circuit breaker and a thermal relay for overload protection.

[0028] Operating principle and advantages: During the application of this equipment, the first cylinder 2 can be started to drive the top plate 3 to move down. The movement of the top plate 3 will cause the upper mold 4 and the lower mold 5 to close together. At this time, injection molding is carried out through the injection equipment and injection tube 6. After the injection molding process is completed, the first cylinder 2 drives the top plate 3 to move the upper mold 4 upward, so that the mold is in the open state. At this time, the demolding mechanism 7 on the back of the frame 1 starts to work. The drive motor 72 at the bottom of the rail frame 71 starts and drives the lead screw 73 to rotate. Since the lead screw 73 is threadedly connected to the slider 74, and the slider 74 can only move in a straight line due to the cross-shaped cavity of the rail frame 71, the slider 74 slides upward along the rail frame 71. The movement of the slider 74 drives the fixed plate 751 and the demolding ejector rod 752 and demolding ejector block 753 fixed on it to rise synchronously. The demolding ejector block 753 pushes the formed plastic packaging box out of the lower mold 5, completing the demolding process.

[0029] Next, the pushing mechanism 8 starts to operate, and the second cylinder 82 at the front end of the side plate 81 is activated. Its output end pushes the pushing plate 83 to move towards the discharge guide plate 11, pushing the demolded plastic packaging box onto the inclined discharge guide plate 11. Under the action of gravity, the packaging box automatically slides down along the discharge guide plate 11, realizing automatic unloading. Throughout the process, the support rods 10 at the four corners of the top plate 3 penetrate through the top of the frame 1 to ensure the stability of the movement of the top plate 3. The rounded corner design of the frame 1 and the base frame 12 avoids collisions with the operators. The cross-shaped structure of the rail frame 71 and the slider 74 ensures the accuracy and stability of the movement of the demolding top assembly 75.

[0030] It is evident that during the application of this equipment, its automated demolding and material pushing process replaces traditional manual operation, significantly shortening the production cycle of a single product. The combination of drive motor 72 and lead screw 73 provides a stable and precisely controllable driving force, making the demolding process fast and efficient. The design of the second cylinder 82 pushing the pusher plate 83 enables the immediate discharge of products, avoiding the time consumption of manual part removal and improving overall production efficiency.

[0031] Meanwhile, the demolding blocks 753 are evenly distributed around the lower mold 5, which can push the product out in a balanced manner, reducing the risk of product deformation caused by uneven local force. The inclined setting of the discharge guide plate 11 allows the product to slide down naturally, avoiding scratches or collision damage that may be caused during manual handling, ensuring the appearance quality of the product. In addition, the rounded corner design of the frame 1 and the base frame 12 conforms to the ergonomic principle, reducing the possibility of injury to operators when working around the equipment. The automated demolding and unloading process reduces the direct contact between operators and the mold, reducing the risk of safety accidents such as pinching and crushing caused by misoperation. Furthermore, the cross-shaped structure of the rail frame 71 and the slider 74 enhances the stability of the demolding mechanism 7, reduces vibration and noise during equipment operation, and improves the working environment.

Claims

1. An injection mold for producing plastic packaging boxes, characterized in that: The system includes a frame (1), a first cylinder (2) is fixedly installed on the top of the frame (1), a top plate (3) is fixedly installed through the frame (1) at the output end of the first cylinder (2), an upper mold (4) is fixedly installed at the bottom of the top plate (3), a base frame (12) is fixedly installed at the bottom inside the frame (1), a lower mold (5) is fixedly installed on the top of the base frame (12), an injection tube (6) is fixedly installed on one side of the top of the top plate (3), the output end of the injection tube (6) is connected to the inside of the upper mold (4), a demolding mechanism (7) is fixedly installed at the lower back of the frame (1), and a pushing mechanism (8) is fixedly installed on one side of the top of the base frame (12). The demolding mechanism (7) includes a rail frame (71), which is fixedly installed in the middle of the back of the frame (1). A drive motor (72) is fixedly installed at the bottom of the rail frame (71). A lead screw (73) is fixedly installed at the output end of the drive motor (72). A slider (74) is threadedly connected to the outer surface of the lead screw (73). The slider (74) is slidably connected to the inside of the rail frame (71). A demolding top assembly (75) is fixedly installed on the front of the slider (74).

2. The injection mold for producing plastic packaging boxes according to claim 1, characterized in that: The demolding top assembly (75) includes a fixing plate (751), which is fixedly installed on the front of the slider (74). Demolding top rods (752) are fixedly installed at the four corners of the top of the fixing plate (751). Demolding top blocks (753) are fixedly installed through the lower mold (5) at the top of the demolding top rods (752).

3. The injection mold for producing plastic packaging boxes according to claim 1, characterized in that: The outer surface corners of the frame (1) are all rounded, and the outer corners of the base frame (12) are also rounded. Support rods (9) are fixedly installed on both sides of the inner front end of the frame (1).

4. The injection mold for producing plastic packaging boxes according to claim 1, characterized in that: The top of the top plate (3) is fixedly installed with support rods (10) at the four corners of the top, and the top of the support rods (10) penetrates the top of the frame (1).

5. The injection mold for producing plastic packaging boxes according to claim 1, characterized in that: The pushing mechanism (8) includes a side plate (81), which is fixedly installed on the lower side of the frame (1). A second cylinder (82) is fixedly installed at the front end of the side plate (81), and a pushing plate (83) is fixedly installed through the side plate (81) at the output end of the second cylinder (82).

6. The injection mold for producing plastic packaging boxes according to claim 5, characterized in that: A discharge guide plate (11) is fixedly installed on the upper end of the side of the base frame (12) away from the side plate (81), and the discharge guide plate (11) is inclined as a whole.

7. The injection mold for producing plastic packaging boxes according to claim 1, characterized in that: The internal cavity of the rail frame (71) is arranged in a cross shape when viewed from above, and the slider (74) is also arranged in a cross shape when viewed from above.

Images