Injection molding process for high-load-bearing and impact-resistant plastic trash can for construction waste disposal

Abstract

The present invention discloses an injection molding process for a high-load-bearing and impact-resistant plastic trash can for construction waste treatment, which relates to the technical field of trash can injection molding processes, and aims to solve the technical problem that current trash cans lack a stress dispersion structure and have a high damage rate of the box body when facing steel pipe-type construction waste, including scale unit composite injection molding. Compared with the existing injection molding technology, the present invention uses a double-layer structure of upper scales, lower scales, supports and elastic materials through scale unit composite injection molding, breaking through the limitations of traditional single-layer injection molding, and the inclined stacking design of the scale units effectively disperses stress, thereby improving the impact resistance, steel pipe puncture resistance and load-bearing capacity of the trash can, and meeting the needs of construction waste treatment. The present invention improves the impact resistance and steel pipe puncture resistance of the trash can, enhances the structural stability and load-bearing capacity through the rigid-flexible double-layer structure of the scale unit composite injection molding, the support of the support members and the inclined stacking design, and meets the needs of construction waste treatment.

Description

Technical Field

[0001] The invention relates to the technical field of garbage bin injection molding technology, and more particularly to an injection molding process for a high-load-bearing and impact-resistant plastic garbage bin for treating construction waste. Background Art

[0002] With the acceleration of urbanization, the amount of construction waste generated has skyrocketed. According to statistics, my country's annual construction waste includes discarded concrete blocks, steel bars, bricks and tiles, steel pipes and other sharp or heavy materials, which places strict requirements on the impact resistance and wear resistance of the waste bins used to store them.

[0003] Existing waste bins produced using injection molding technology suffer from significant impact resistance issues when handling steel pipe construction waste. The bottom structure of existing bins is often designed with vertical stacking or flat reinforced baffles. When steel pipes are dropped into the bin, the sharp ends of the pipes face the bottom of the bin. However, facing the continuous vertical impact and pressure from the sharp ends of the pipes, traditional structures lack buffering and stress dispersion mechanisms. They rely solely on structural strength to resist the impact, concentrating the impact force on a localized area. Stress cannot be effectively dispersed, making it prone to joint rupture and structural puncture. This significantly shortens the bin's service life, making it difficult to meet the high-intensity use requirements of construction waste disposal scenarios and limiting its practical application. In light of this, we propose an injection molding process for high-load-bearing, impact-resistant plastic bins for construction waste disposal. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology, adapt to actual needs, and provide an injection molding process for a high-load-bearing and impact-resistant plastic trash can for construction waste disposal, so as to solve the technical problems that the current trash can lacks a stress dispersion structure and has a high damage rate when dealing with steel pipe construction waste.

[0005] To solve the above technical problems, the present invention provides the following technical solution: an injection molding process for a high-load-bearing and impact-resistant plastic trash can for construction waste disposal, comprising the following steps:

[0006] S1. Composite injection molding of scale plate units: The upper scale plate and the lower scale plate are simultaneously molded through the upper scale plate injection molding structure and the lower scale plate injection molding structure in the injection molding assembly, and the support member is secondary molded through the secondary injection molding structure. The elastic material for buffering is injected between the upper scale plate, the lower scale plate and the support member to form a single scale plate unit of the scale plate structure;

[0007] S2. Rotational molding of the trash bin body: the trash bin body is formed by rotational molding of the rotational molding components;

[0008] S3. Scale plate unit stacking and box body assembly: The scale plate units are stacked in an inclined state and inserted into the support plate, and then the support plate is clamped into the trash box body to complete the production of the trash box.

[0009] Preferably, the rotational molding assembly includes a box body production mold, and the rotational molding assembly is used to produce the trash can box body through the box body production mold.

[0010] Preferably, the injection molding assembly includes a shell, an upper scale plate injection molding structure installed at the lower part of the shell, a lower scale plate injection molding structure installed at the middle part of the shell, a secondary injection molding structure installed at the upper part of the shell, and an injection molding drive structure installed on the shell;

[0011] The upper scale plate injection molding structure includes a first upper mold and a first lower mold, and the upper scale plate injection molding structure is used to produce the upper scale plate;

[0012] The lower scale plate injection molding structure includes a second upper mold and a second lower mold, and the lower scale plate injection molding structure is used to produce the lower scale plate;

[0013] The secondary injection molding structure includes a secondary injection mold, a mounting plate, a first cylinder, and a support member injection mold. The mounting plate is mounted on the housing. The first cylinder is mounted on the mounting plate, and an output end of the first cylinder is connected to the secondary injection mold. The support member injection mold is disposed in a cavity of the secondary injection mold.

[0014] The injection molding drive structure is used to drive the upper scale plate injection molding structure and the lower scale plate injection molding structure to work.

[0015] Preferably, the injection molding drive structure further includes a lifting structure, a transporting structure, a flipping structure, an ejecting structure, a lifting structure and a positioning structure;

[0016] The lifting structure is used to drive the first upper mold and the second upper mold to move up and down, the carrying structure is used to drive the upper scale plate to move to the flip structure, and drive the lower scale plate to move to the lifting structure, the flip structure is used to flip the upper scale plate and clamp the upper scale plate to the lower scale plate, the ejection structure is used to eject the completed upper scale plate, lower scale plate and scale unit, the lifting structure is used to lift the lower scale plate to the same height as the upper scale plate, and the positioning structure is used to fix the lifting component of the lifting structure so that the lower scale plate will not move downward.

[0017] Preferably, the secondary injection molding structure includes a rotary demoulding component, and the rotary demoulding component includes a rotary driving device, a sleeve rod, and a rotary demoulding cover;

[0018] The rotary drive device is installed in the secondary injection mold, the sleeve rod is rotatably connected to the output end of the rotary drive device, the rotary demoulding cover is rotatably connected to the middle part of the support injection inner mold, and the rotary demoulding cover is installed outside the sleeve rod.

[0019] Preferably, the secondary injection molding structure further comprises a lifting and demoulding component, and the lifting and demoulding component comprises a push rod and a second cam;

[0020] The push rod is slidably connected in the sleeve rod, the second cam is installed at the end of the push rod, and the second cam is in contact with the first cam, the first cam is installed inside the sleeve rod, and the first cam and the second cam are used to move the push rod up and down when the sleeve rod rotates.

[0021] Preferably, the secondary injection molding structure further includes a side demoulding component, and the side demoulding component includes a driving rod, a connecting rod, a side demoulding module, a guide plate, and a guide rod;

[0022] The driving rod is installed on the top rod, the connecting rod is rotatably connected to the driving rod, the other end of the connecting rod is rotatably connected to the side stripping module, the side stripping module is movably connected in the through groove on the side of the support injection inner mold, the guide plate is installed on the support injection inner mold, and the guide plate is slidably connected to the top rod, a number of the guide rods are equidistantly annularly installed on the guide plate, and the other ends of the guide rods are all connected to the side stripping module.

[0023] Preferably, an air inlet is provided on the inner injection mold of the support component, and the air inlet is connected to an external air source. After the side stripping module moves, the through groove on the side of the inner injection mold of the support component forms an air outlet hole.

[0024] Preferably, the trash can comprises a trash can body, a scale plate structure, and a support plate;

[0025] The scale plate structure includes an upper scale plate, a lower scale plate and a support member. The upper scale plate and the lower scale plate form a scale plate unit. The front ends of several scale plate units are tilted upward and stacked alternately above the support plate. Several of the support members are arranged at the bottom end of the upper scale plate, and several of the support members are fixed in the through groove of the lower scale plate by elastic material.

[0026] Preferably, the support member comprises an upper support portion, a transition portion and a lower support portion;

[0027] The upper support portion is a variable-section hexagonal structure that gradually decreases from the bottom to the top. The transition portion is an outwardly curved arc structure. The lower support portion is a uniform-section hexagonal prism structure.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. Compared with existing injection molding technology, the present invention uses a double-layer structure of upper scales, lower scales, supports and elastic materials through composite injection molding of scale units, breaking through the limitations of traditional single-layer injection molding. The scale units are also designed to be stacked at an angle to further optimize force, reduce direct surface impact, and effectively disperse stress, thereby improving the impact resistance, steel pipe puncture resistance and load-bearing capacity of the garbage bin, meeting the needs of construction waste treatment. The present invention improves the impact resistance and steel pipe puncture resistance of the garbage bin through the rigid-flexible double-layer structure of composite injection molding of scale units, the support of the supports and the tilted stacking design, and enhances the structural stability and load-bearing capacity to meet the needs of construction waste treatment.

[0030] 2. The present invention utilizes a rotating demolding cover. After the injection molding process is completed, the rotary drive device is activated, and the output of the internal servo motor drives the sleeve rod to rotate. The rotating demolding cover outside the sleeve rod rotates synchronously with the sleeve rod. Through the synergistic effect of centrifugal force and friction, the support member adhered to the support member injection mold is gradually loosened, separating the product from the mold sidewall, avoiding direct vertical tensile demolding that may cause damage to the newly processed support member. The present invention utilizes a rotating demolding cover to loosen the support member from the support member injection mold after production through horizontal rotational force, thereby making the support member easier to demold.

[0031] 3. The present invention utilizes a lift-and-release component and a side-release structure. During the rotation of the sleeve rod, the lift-and-release component's first cam engages with the second cam. As the sleeve rod rotates, the second cam rolls along the spiral surface of the first cam, driving the ejector rod in a regular up-and-down reciprocating motion within the sleeve rod, further loosening the adhesion between the product and the support member's injection mold. The side-release component, through the ejector rod, drives the drive rod up and down. The drive rod then converts the linear motion into horizontal telescopic motion for the side-release module via a connecting rod. Twelve guide rods and a guide plate form a stable guide system, ensuring that the side-release module slides smoothly within the side grooves of the support member's injection mold. When the ejector rod rises, the side-release module simultaneously extends and inserts itself between the product and the mold sidewall, separating the product from the mold sidewall using the lateral force generated by its wedge-shaped structure. When the ejector rod descends, the side-release module retracts and returns to its original position. The present invention utilizes the coordinated operation of the lift-and-release component and the side-release structure to apply multi-directional forces, both vertical and horizontal, to the product, enabling efficient demolding.

[0032] 4. The present invention constructs an air pressure-assisted demoulding system by setting an air inlet hole, which works in conjunction with the mechanical demoulding structure to further improve the demoulding efficiency and product integrity. When the side demoulding module is driven by the ejector rod to move out of the side groove of the support injection mold, the originally closed groove is converted into an air outlet hole, forming an air flow channel through the air inlet hole. The external high-pressure air source injects compressed air into the mold through the air inlet hole. The high-speed air flow flows rapidly along the gap between the product and the inner wall of the mold, forming a uniform air film layer between the two. This air film can not only significantly reduce the friction between the product and the mold, but also use the air pressure difference to generate an outward thrust to assist in loosening the adhesion. The buffering effect of the air film avoids direct rigid contact between the mechanical parts and the product during the demoulding process, effectively preventing scratches on the scale plate surface or local damage to the elastic connector. The present invention constructs an air pressure-assisted demoulding system by setting an air inlet hole, reduces the friction between the product and the mold, and generates an outward thrust through the air pressure difference, thereby assisting in demoulding.

[0033] 5. The present invention improves the structure of the trash bin by adding a scale plate structure. Within this scale plate structure, the scale plate unit, consisting of upper and lower scale plates, provides protection against impacts caused by garbage. The receiving grooves of the upper scale plates and the protrusions of the lower scale plates form a precise interlocking structure. The connecting channel between the two is injection-molded with an elastic material, forming a connection system that combines rigidity and flexibility. This elastic material, such as a polyurethane elastomer, can deform to a certain extent when absorbing impact forces. By incorporating the scale plate structure into the trash bin structure and utilizing the elastic connection of the scale plate structure, the present invention can convert the impact energy of the steel pipe into elastic potential energy, thereby avoiding stress concentration.

[0034] 6. The present invention sets a support member under the upper scale plate. The support member adopts a composite form design. The variable cross-section hexagonal structure of the upper support part gradually changes the cross-sectional area, and evenly distributes the top load to the transition part through the oblique edges of the hexagonal structure; the arc surface structure of the transition part acts as an elastic buffer layer, which can absorb and redistribute the stress from the upper support part to avoid stress mutations; the hexagonal prism of the lower support part improves the compressive strength while maintaining lightweight. Its hexagonal geometric configuration can evenly transmit stress in all directions, ensuring that the box does not deform under long-term load. The present invention makes composite improvements to the support member structure, so that the scale plate structure can have higher compressive strength when carrying heavy weight, making it less likely for the box to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the rotational molding component of the present invention;

[0036] Figure 2 It is a structural schematic diagram of the injection molding component of the present invention;

[0037] Figure 3 Schematic diagram of the internal structure of the secondary injection mold of the present invention;

[0038] Figure 4 This is a structural schematic diagram of the support member injection mold and its connection structure of the present invention;

[0039] Figure 5 This is a schematic cross-sectional view of the inner injection mold of the support member and its connection structure according to the present invention;

[0040] Figure 6 This is a schematic structural diagram of the side demoulding component of the present invention;

[0041] Figure 7 This is a schematic structural diagram of the injection molding component of the present invention without the housing;

[0042] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of point A in the middle

[0043] Figure 9 This is a schematic diagram of the internal structure of the injection molding component of the present invention when producing a scale unit;

[0044] Figure 10 It is a structural schematic diagram of the flip structure of the present invention;

[0045] Figure 11 It is a structural schematic diagram of the ejection structure of the present invention;

[0046] Figure 12 It is a structural schematic diagram of the lifting structure of the present invention;

[0047] Figure 13 This is a schematic structural diagram of the trash can body of the present invention;

[0048] Figure 14 This is a structural schematic diagram of the support plate of the present invention when the scale plate structure is installed;

[0049] Figure 15 Schematic diagram of the structure of the scale plate unit of the present invention;

[0050] Figure 16 Schematic diagram of the structure of the support member of the present invention.

[0051] Description of the numbers in the figure:

[0052] 1. Roto-molding component; 2. Injection molding component; 3. Upper scale plate injection molding structure; 4. Lower scale plate injection molding structure; 5. Secondary injection molding structure; 6. Injection molding drive structure; 7. Trash bin body; 8. Scale plate structure; 9. Support plate;

[0053] 201, housing;

[0054] 301, first upper mold; 302, first lower mold;

[0055] 401, second upper die; 402, second lower die;

[0056] 501, secondary injection mold; 502, mounting plate; 503, first cylinder; 504, support part injection inner mold; 505, rotary demoulding component; 506, lifting demoulding component; 507, side demoulding component;

[0057] 5041, air intake;

[0058] 5051, rotary drive device; 5052, sleeve rod; 5053, rotary demoulding cover; 5054, first cam;

[0059] 5061, ejector rod; 5062, second cam;

[0060] 5071, driving rod; 5072, connecting rod; 5073, side release module; 5074, guide plate; 5075, guide rod;

[0061] 601, lifting structure; 602, transporting structure; 603, flipping structure; 604, ejecting structure; 605, lifting structure; 606, positioning structure;

[0062] 6011, second cylinder; 6012, first guide member;

[0063] 6021, slide rail; 6022, track trolley; 6023, auxiliary rod;

[0064] 6031, adjustable gripper structure; 6032, fixed plate; 6033, tilting shaft; 6034, gear; 6035, rack; 6036, chute; 6037, drive plate; 6038, third cylinder;

[0065] 6041, mounting frame; 6042, ejection hole; 6043, ejection plate; 6044, ejection rod; 6045, resetting elastic member;

[0066] 6051, insert; 6052, lifting block; 6053, suction cup structure; 6054, fourth cylinder; 6055, second guide member;

[0067] 6061, fifth cylinder; 6062, positioning plate; 6063, positioning hole;

[0068] 801, upper scale plate; 802, lower scale plate; 803, support member; 804, upper support portion; 805, transition portion; 806, lower support portion. DETAILED DESCRIPTION

[0069] Example 1, as Figures 1 to 16 As shown, the present invention relates to an injection molding process for a high-load-bearing and impact-resistant plastic trash can for construction waste disposal, comprising the following steps:

[0070] S1. Composite injection molding of scale plate unit: The upper scale plate 801 and the lower scale plate 802 are simultaneously injection molded through the upper scale plate injection molding structure 3 and the lower scale plate injection molding structure 4 in the injection molding component 2, and then the support member 803 is secondary injection molded through the secondary injection molding structure 5. The elastic material for buffering is injection molded between the upper scale plate 801, the lower scale plate 802 and the support member 803 to form a single scale plate unit of the scale plate structure 8.

[0071] When working here, the upper scale plate 801 and the lower scale plate 802 that have been injection-molded are demolded onto the first lower mold 302 and the second upper mold 401 through the ejection structure 604, and the conveying structure 602 drives the first lower mold 302 to move to the flipping structure 603, and drives the second lower mold 402 to move to the lifting structure 605. The lifting structure 605 drives the second lower mold 402 to move up to the same horizontal plane as the first lower mold 302, and fixes the lifted second lower mold 402 through the positioning structure 606. The flipping structure 603 clamps the upper scale plate 801 demolded on the first lower mold 302, drives the upper scale plate 801 to flip 180° and cover it on the lower scale plate 802. Then the secondary injection mold 501 cooperates with the second lower mold 402 to form a structure for secondary injection molding of the upper scale plate 801 and the lower scale plate 802.

[0072] S2, rotational molding of the trash bin body 7: The trash bin body 7 is formed by rotational molding of the rotational molding assembly 1.

[0073] S3. Scale plate unit stacking and box body assembly: The scale plate units are stacked in an inclined state and inserted into the support plate 9, and then the support plate 9 is placed into the trash box body, and the support plate 9 is clamped into the trash box body 7 by pressing to complete the production of the trash box.

[0074] Compared to existing injection molding technology, the present invention utilizes a double-layer structure of upper scale plate 801, lower scale plate 802, support member 803, and elastic material through composite injection molding of scale plate units, breaking through the limitations of traditional single-layer injection molding. Furthermore, the inclined stacking design of the scale plate units further optimizes stress, reduces direct surface impact, and effectively disperses stress, thereby improving the impact resistance, steel pipe puncture resistance, and load-bearing capacity of the garbage bin, meeting the needs of construction waste disposal. The present invention utilizes a rigid-flexible double-layer structure of composite injection molding of scale plate units, the support of support member 803, and the inclined stacking design to improve the impact resistance and steel pipe puncture resistance of the garbage bin, enhance structural stability and load-bearing capacity, and meet the needs of construction waste disposal.

[0075] Specifically, such as Figures 1 to 12 As shown, the rotational molding assembly 1 of the present invention includes a box body production mold, and the rotational molding assembly 1 is used to produce a trash box body 7 through the box body production mold.

[0076] The injection molding assembly 2 includes a housing 201, an upper scale plate injection molding structure 3 installed at the lower portion of the housing 201, a lower scale plate injection molding structure 4 installed at the middle portion of the housing 201, a secondary injection molding structure 5 installed at the upper portion of the housing 201, and an injection molding drive structure 6 installed on the housing 201;

[0077] The upper scale plate injection molding structure 3 includes a first upper mold 301 and a first lower mold 302. The upper scale plate injection molding structure 3 is used to produce the upper scale plate 801.

[0078] The lower scale plate injection molding structure 4 includes a second upper mold 401 and a second lower mold 402. The lower scale plate injection molding structure 4 is used to produce the lower scale plate 802.

[0079] The secondary injection molding structure 5 includes a secondary injection mold 501, a mounting plate 502, a first cylinder 503, and a support component injection mold 504. The mounting plate 502 is mounted on the housing 201, and the first cylinder 503 is mounted on the mounting plate 502. The output end of the first cylinder 503 is connected to the secondary injection mold 501. The support component injection mold 504 is disposed within the cavity of the secondary injection mold 501.

[0080] The injection molding drive structure 6 is used to drive the upper scale plate injection molding structure 3 and the lower scale plate injection molding structure 4 to work.

[0081] The lifting structure 601 includes a second cylinder 6011 and a first guide member 6012; the second cylinder 6011 and the first guide member 6012 are both installed on the shell 201, and one side of the first upper mold 301 and the second upper mold 401 are respectively connected to the output ends of the two second cylinders 6011, and the other sides of the first upper mold 301 and the second upper mold 401 are respectively installed on the first guide member 6012.

[0082] The transport structure 602 includes a slide rail 6021, a rail trolley 6022 and an auxiliary rod 6023; the slide rail 6021 is installed on the shell 201, the rail trolley 6022 is slidably connected to the slide rail 6021, one side of the first lower mold 302 and the second lower mold 402 are respectively installed on the two rail trolleys 6022, the auxiliary rod 6023 is installed on the shell 201, and the other side of the first lower mold 302 and the second lower mold 402 are respectively attached to one side of the two auxiliary rods 6023.

[0083] The flip structure 603 includes an adjustable clamping jaw structure 6031, a fixed plate 6032, a flip shaft 6033, a gear 6034, a rack 6035, a slide 6036, a drive plate 6037, and a third cylinder 6038; the adjustable clamping jaw structure 6031 is provided in the middle of the housing 201, and the adjustable clamping jaw structure 6031 is rotatably mounted on the fixed plate 6032, the flip shaft 6033 is connected to the adjustable clamping jaw structure 6031, and the gear 6034 is mounted on the flip shaft 6033. , and the gear 6034 is meshed and connected to the rack 6035, the rack 6035 is slidably connected to the slide 6036, the drive plate 6037 is installed on the rack 6035, and the drive plate 6037 is installed at the output end of the third cylinder 6038, the slide 6036 and the third cylinder 6038 are both installed in the middle of the shell 201, and the adjustable clamping jaw structure 6031 is used to clamp the upper scale plate 801 and drive the upper scale plate 801 to flip 180 degrees and clamp it together with the lower scale plate 802.

[0084] The ejection structure 604 includes a mounting frame 6041, an ejection hole 6042, an ejection plate 6043, an ejection rod 6044, and a reset elastic member 6045; the two mounting frames 6041 are respectively mounted on the top of the first upper mold 301 and the second upper mold 401, the ejection hole 6042 is opened at the top of the mounting frame 6041, the ejection plate 6043 is arranged below the mounting frame 6041, the ejection rod 6044 is mounted on the ejection plate 6043, and the two groups of ejection rods 6044 are respectively inserted into the first upper mold 301 and the second upper mold 401, the reset elastic member 6045 is sleeved on the ejection rod 6044, and the two groups of reset elastic members 6045 are respectively connected between the two groups of ejection plates 6043 and the first upper mold 301 and the second upper mold 401.

[0085] The lifting structure 605 includes an insert 6051, a lifting block 6052, a suction cup structure 6053, a fourth cylinder 6054, and a second guide member 6055; the insert 6051 is connected to the rail trolley 6022, the lifting block 6052 is installed on one side of the second lower mold 402, and the lifting block 6052 is inserted and connected to the insert 6051, the suction cup structure 6053 is located above the lifting block 6052, and the suction cup structure 6053 is installed at the output end of the fourth cylinder 6054, the fourth cylinder 6054 and the second guide member 6055 are both installed at the lower part of the shell 201, and the second guide member 6055 is installed on the other side of the second lower mold 402.

[0086] The positioning structure 606 includes a fifth cylinder 6061, a positioning plate 6062, and a positioning hole 6063; the fifth cylinder 6061 is installed in the middle of the shell 201, the positioning plate 6062 is installed at the output end of the fifth cylinder 6061, and the positioning hole 6063 is opened on one side of the second lower mold 402, and the positioning hole 6063 is adapted to the insertion rod extending from the positioning plate 6062.

[0087] When the present invention is working, the two second cylinders 6011 drive the first upper mold 301 and the second upper mold 401 to move downward along the two first guide members 6012, and the first lower mold 302 and the second lower mold 402 complete the mold closing, and the upper scale plate 801 and the lower scale plate 802 are produced by injection molding;

[0088] After the injection molding is completed, the external ejection device drives the ejection plate 6043 to move through the ejection hole 6042, and the ejection plate 6043 drives the ejection rod 6044 to move. The ejection rod 6044 ejects the upper scale plate 801 and the lower scale plate 802 onto the first lower mold 302 and the second lower mold 402;

[0089] After the molded part is ejected, the rail trolley 6022 drives the insert block 6051 to move, the insert block 6051 drives the lifting block 6052 to move, and the lifting block 6052 drives the first lower mold 302 and the second lower mold 402 to move along the slide rail 6021. The auxiliary rod 6023 assists the first lower mold 302 and the second lower mold 402 in aligning in a straight line, so that the first lower mold 302 moves to the lifting structure 605 and the second lower mold 402 moves to the carrying structure 602.

[0090] When the second lower mold 402 moves to the lifting structure 605, the fourth cylinder 6054 drives the suction cup structure 6053 to adsorb on the lifting block 6052, causing the lifting block 6052 to move upward. The lifting block 6052 drives the second lower mold 402 to move upward and be located on the same plane as the first lower mold 302. At this time, the fifth cylinder 6061 drives the positioning plate 6062 to extend, and the insertion rod on the positioning plate 6062 is inserted into the positioning hole 6063, so that the position of the second lower mold 402 is fixed;

[0091] After the second lower mold 402 is lifted, the upper scale plate 801 is clamped by the adjustable clamping jaw structure 6031, and the third cylinder 6038 drives the rack 6035 to move along the slide groove 6036 through the driving plate 6037. When the rack 6035 moves, the gear 6034 rotates and drives the flip shaft 6033 to rotate. The flip shaft 6033 drives the adjustable clamping jaw structure 6031 to flip 180°, so that the upper scale plate 801 is clamped to the lower scale plate 802.

[0092] Further, such as Figures 3 to 5 As shown, the secondary injection molding structure 5 involved in the present invention includes a rotary demolding component 505, and the rotary demolding component 505 includes a rotary driving device 5051, a sleeve rod 5052, and a rotary demolding cover 5053; the rotary driving device 5051 is installed in the secondary injection mold 501, the sleeve rod 5052 is rotatably connected to the output end of the rotary driving device 5051, the rotary demolding cover 5053 is rotatably connected to the middle part of the support member injection inner mold 504, and the rotary demolding cover 5053 is installed on the outside of the sleeve rod 5052.

[0093] The present invention utilizes a rotating demolding cover 5053. After the injection molding process is completed, the rotary drive device 5051 is activated, and the output of the internal servo motor drives the sleeve rod 5052 to rotate. The rotating demolding cover 5053 outside the sleeve rod 5052 rotates synchronously with the sleeve rod 5052. Through the synergistic effect of centrifugal force and friction, the support member 803 adhered to the support member injection mold 504 is gradually loosened, separating the product from the mold sidewall, and avoiding direct vertical tensile demolding that may damage the newly processed support member 803. The present invention utilizes a rotating demolding cover 5053. After the support member 803 is produced, the horizontal rotational force is used to loosen the support member 803 from the support member injection mold 504, thereby making it easier to demold the support member 803.

[0094] Further, if Figures 3 to 5 As shown, the secondary injection molding structure 5 involved in the present invention also includes a lifting and demolding component 506, which includes a push rod 5061 and a second cam 5062; the push rod 5061 is slidably connected in the sleeve rod 5052, and the second cam 5062 is installed at the end of the push rod 5061, and the second cam 5062 is attached to the first cam 5054, and the first cam 5054 is installed inside the sleeve rod 5052. The first cam 5054 and the second cam 5062 are used to move the push rod 5061 up and down when the sleeve rod 5052 rotates.

[0095] The secondary injection molding structure 5 also includes a side demolding component 507, which includes a driving rod 5071, a connecting rod 5072, a side demolding module 5073, a guide plate 5074, and a guide rod 5075; the driving rod 5071 is installed on the top rod 5061, the connecting rod 5072 is rotatably connected to the driving rod 5071, and the other end of the connecting rod 5072 is rotatably connected to the side demolding module 5073, the side demolding module 5073 is movably connected to the through groove on the side of the support injection inner mold 504, the guide plate 5074 is installed on the support injection inner mold 504, and the guide plate 5074 is slidably connected to the top rod 5061, twelve guide rods 5075 are equidistantly installed on the guide plate 5074 in a ring shape, and the other ends of the twelve guide rods 5075 are all connected to the side demolding module 5073.

[0096] The present invention uses a lifting demolding component 506 and a side demolding structure. During the rotation of the sleeve rod 5052, the first cam 5054 of the lifting demolding component 506 cooperates with the second cam 5062. When the sleeve rod 5052 rotates, the second cam 5062 rolls along the spiral surface of the first cam 5054, driving the ejector rod 5061 to perform regular up and down reciprocating motion in the sleeve rod 5052, further loosening the adhesion between the product and the support part injection mold 504. The side demolding component 507 drives the driving rod 5071 to move up and down through the ejector rod 5061, and the driving rod 5071 then converts the linear motion into horizontal telescopic motion of the side demolding module 5073 through the connecting rod 5072. Twelve guide rods 5075 and guide plates 5074 form a stable guide system, ensuring that the side stripper modules 5073 slide smoothly within the side slots of the support member's injection mold 504. When the ejector pin 5061 rises, the side stripper modules 5073 simultaneously extend and insert themselves between the product and the mold sidewalls, utilizing the lateral force generated by their wedge-shaped structures to separate the product from the mold sidewalls. When the ejector pin 5061 descends, the side stripper modules 5073 retract and return to their original positions. This present invention utilizes the coordinated operation of the ejector components 506 and the side stripper structure to apply multi-directional forces, both vertically and horizontally, to the product, enabling efficient demolding.

[0097] Furthermore, Figures 3 to 6 As shown, the support part injection inner mold 504 of the present invention is provided with an air inlet 5041, which is connected to an external air source. After the side stripping module 5073 moves, the through groove on the side of the support part injection inner mold 504 forms an air outlet hole.

[0098] The present invention constructs an air pressure-assisted demoulding system through the setting of the air inlet hole 5041, which works in conjunction with the mechanical demoulding structure to further improve the demoulding efficiency and product integrity. When the side demoulding module 5073 is driven by the push rod 5061 to move out of the side groove of the support injection inner mold 504, the originally closed groove is converted into an air outlet hole, forming a through air flow channel with the air inlet hole 5041. The external high-pressure air source injects compressed air into the mold through the air inlet hole 5041, and the high-speed air flow flows rapidly along the gap between the product and the inner wall of the mold, forming a uniform air film layer between the two. This air film can not only significantly reduce the friction between the product and the mold, but also use the air pressure difference to generate an outward thrust to assist in loosening the adhesion. The buffering effect of the air film avoids direct rigid contact between the mechanical parts and the product during the demoulding process, and effectively prevents scratches on the scale surface or local damage to the elastic connector. The present invention constructs an air pressure-assisted demoulding system by providing an air inlet hole 5041, thereby reducing the friction between the product and the mold and generating an outward thrust through the air pressure difference, thereby assisting in demoulding.

[0099] Furthermore, if Figures 13 to 16As shown, the trash can involved in the present invention includes a trash can body 7, a scale plate structure 8, and a support plate 9; the scale plate structure 8 includes an upper scale plate 801, a lower scale plate 802 and a support member 803, the upper scale plate 801 and the lower scale plate 802 constitute a scale plate unit, the front ends of the twenty scale plate units are tilted upward and stacked in an interlaced manner above the support plate 9, three support members 803 are arranged at the bottom end of the upper scale plate 801, and the three support members 803 are fixed in the through groove of the lower scale plate 802 by elastic material.

[0100] The support member 803 includes an upper support portion 804, a transition portion 805 and a lower support portion 806; the upper support portion 804 is a variable-section hexagonal structure, and the variable-section hexagonal structure gradually shrinks from bottom to top, the transition portion 805 is an outward-bent arc surface structure, and the lower support portion 806 is a uniform-section hexagonal prism structure.

[0101] The present invention improves the structure of the trash bin by adding a scale plate structure 8. Within scale plate structure 8, the scale plate unit, consisting of upper scale plate 801 and lower scale plate 802, provides protection against impacts caused by garbage. The receiving grooves of the scales of upper scale plate 801 and the protrusions of the scales of lower scale plate 802 form a precise interlocking structure. The connecting channel between the two is injection-molded with an elastic material, forming a connection system that combines both rigidity and flexibility. This elastic material, such as a polyurethane elastomer, can produce a certain amount of deformation when absorbing impact forces. By providing scale plate structure 8 within the trash bin structure, the present invention converts the impact energy of the steel pipe into elastic potential energy through the elastic connection of scale plate structure 8, thereby avoiding stress concentration.

[0102] The present invention provides a support member 803 below the upper scale plate 801. The support member 803 adopts a composite design. The variable cross-section hexagonal structure of the upper support portion 804 gradually changes in cross-sectional area, evenly distributing the top load to the transition portion 805 through the oblique edges of the hexagonal structure. The curved surface structure of the transition portion 805 acts as an elastic buffer layer, absorbing and redistributing the stress from the upper support portion 804 to avoid sudden stress changes. The hexagonal prism of the lower support portion 806 improves the compressive strength while maintaining lightweight. Its hexagonal geometric configuration allows stress to be evenly transmitted in all directions, ensuring that the box does not deform under long-term load. The present invention improves the structure of the support member 803 so that the scale plate structure 8 can have higher compressive strength when carrying heavy weight, making it less likely for the box to deform.

[0103] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An injection molding process for a high-load-bearing and impact-resistant plastic trash can for construction waste disposal, characterized in that: The following steps are involved: S1. Composite injection molding of scale plate units: The upper scale plate and the lower scale plate are simultaneously molded through the upper scale plate injection molding structure and the lower scale plate injection molding structure in the injection molding assembly, and the support member is secondary molded through the secondary injection molding structure. The elastic material for buffering is injected between the upper scale plate, the lower scale plate and the support member to form a single scale plate unit of the scale plate structure; The secondary injection molding structure includes a rotary demoulding component, and the rotary demoulding component includes a rotary driving device, a sleeve rod, and a rotary demoulding cover; The rotary drive device is installed in the secondary injection mold, the sleeve rod is rotatably connected to the output end of the rotary drive device, the rotary demoulding cover is rotatably connected to the middle part of the support member injection mold, and the rotary demoulding cover is installed on the outside of the sleeve rod; The secondary injection molding structure further includes a lifting and demoulding component, and the lifting and demoulding component includes a push rod and a second cam; The push rod is slidably connected to the sleeve rod, the second cam is installed at the end of the push rod, and the second cam is in contact with the first cam, the first cam is installed inside the sleeve rod, and the first cam and the second cam are used to move the push rod up and down when the sleeve rod rotates; The secondary injection molding structure further includes a side demoulding component, and the side demoulding component includes a driving rod, a connecting rod, a side demoulding module, a guide plate, and a guide rod; The driving rod is mounted on the top rod, the connecting rod is rotatably connected to the driving rod, the other end of the connecting rod is rotatably connected to the side stripping module, the side stripping module is movably connected to the through groove on the side of the support injection mold, the guide plate is mounted on the support injection mold, and the guide plate is slidably connected to the top rod, a plurality of the guide rods are equidistantly annularly mounted on the guide plate, and the other ends of the plurality of guide rods are connected to the side stripping module; An air inlet is provided on the inner injection mold of the support member, and the air inlet is connected to an external air source. After the side stripping module moves, the through groove on the side of the inner injection mold of the support member forms an air outlet hole; The support member includes an upper support portion, a transition portion and a lower support portion; The upper support portion is a variable-section hexagonal structure, and the variable-section hexagonal structure gradually decreases from the bottom to the top, the transition portion is an outwardly curved arc structure, and the lower support portion is a uniform-section hexagonal prism structure; S2. Rotational molding of the trash bin body: the trash bin body is formed by rotational molding of the rotational molding components; S3. Scale plate unit stacking and box body assembly: The scale plate units are stacked in an inclined state and inserted into the support plate, and then the support plate is clamped into the trash box body to complete the production of the trash box.

2. The injection molding process of a high-load-bearing and impact-resistant plastic trash can for construction waste disposal according to claim 1, characterized in that: The rotational molding assembly includes a box body production mold, and the rotational molding assembly is used to produce a trash box body through the box body production mold.

3. The injection molding process of a high-load-bearing and impact-resistant plastic trash can for construction waste disposal according to claim 2, characterized in that: The injection molding assembly includes a housing, an upper scale plate injection molding structure installed at the lower part of the housing, a lower scale plate injection molding structure installed at the middle part of the housing, a secondary injection molding structure installed at the upper part of the housing, and an injection molding drive structure installed on the housing; The upper scale plate injection molding structure includes a first upper mold and a first lower mold, and the upper scale plate injection molding structure is used to produce the upper scale plate; The lower scale plate injection molding structure includes a second upper mold and a second lower mold, and the lower scale plate injection molding structure is used to produce the lower scale plate; The secondary injection molding structure includes a secondary injection mold, a mounting plate, a first cylinder, and a support member injection mold. The mounting plate is mounted on the housing. The first cylinder is mounted on the mounting plate, and an output end of the first cylinder is connected to the secondary injection mold. The support member injection mold is disposed in a cavity of the secondary injection mold. The injection molding drive structure is used to drive the upper scale plate injection molding structure and the lower scale plate injection molding structure to work.

4. The injection molding process of a high-load-bearing and impact-resistant plastic trash can for construction waste disposal according to claim 3, characterized in that: The injection molding drive structure also includes a lifting structure, a transport structure, a flip structure, an ejection structure, a lifting structure and a positioning structure; The lifting structure is used to drive the first upper mold and the second upper mold to move up and down, the carrying structure is used to drive the upper scale plate to move to the flip structure, and drive the lower scale plate to move to the lifting structure, the flip structure is used to flip the upper scale plate and clamp the upper scale plate to the lower scale plate, the ejection structure is used to eject the completed upper scale plate, lower scale plate and scale unit, the lifting structure is used to lift the lower scale plate to the same height as the upper scale plate, and the positioning structure is used to fix the lifting component of the lifting structure so that the lower scale plate will not move downward.

5. The injection molding process of a high-load-bearing and impact-resistant plastic trash can for construction waste disposal according to claim 1, characterized in that: The trash can comprises a trash can body, a scale plate structure, and a support plate; The scale plate structure includes an upper scale plate, a lower scale plate and a support member. The upper scale plate and the lower scale plate form a scale plate unit. The front ends of several scale plate units are tilted upward and stacked alternately above the support plate. Several of the support members are arranged at the bottom end of the upper scale plate, and several of the support members are fixed in the through groove of the lower scale plate by elastic material.

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