Intelligent injection molding equipment for garbage can

Abstract

The application discloses a garbage can intelligent injection molding equipment, which comprises a base, an injection device, a film combining assembly and a hydraulic transmission part, the injection device is arranged on one side of the upper end surface of the base, the film combining assembly is installed in the middle of the upper end surface of the base and is connected with the injection device on one side, and the hydraulic transmission part is arranged on the other side of the film combining assembly; a support frame is vertically fixed on the side of the base close to the injection device, a cross beam is slidably installed on the support frame, and a sorting mechanical arm is slidably assembled on the cross beam; in the application, a front mold core arranged in the film combining assembly can be obliquely matched with a rear mold core in initial mold combining injection, so that injection material can be fully filled in the corner hole of the rear mold core during initial injection, and after initial injection, the front mold core is gradually rotated and reset, excess material in the corner position of the rear mold core is fully extruded, and micro-extrusion molding in the injection process is realized.

Description

Technical Field

[0001] This invention belongs to the field of injection molding equipment technology, specifically an intelligent injection molding equipment for trash cans. Background Technology

[0002] Injection molding technology is one of the most commonly used processes in the production of plastic products, and it is widely used in the manufacture of household items such as trash cans. However, in the production process of traditional trash can injection molding equipment, the deep cavity, micro-hole groove, or thin-walled area of ​​the trash can is prone to incomplete filling (short shot phenomenon) due to the high flow resistance of the injected plastic. In particular, the corners are high-incidence areas of defects due to rapid cooling and high flow resistance. Moreover, the conventional holding pressure is difficult to effectively transmit to the corner areas far away from the gate, resulting in internal voids or looseness in the corner areas due to insufficient filling, with a high defect rate and increased production costs for enterprises.

[0003] Therefore, it is necessary to provide an intelligent injection molding equipment for trash cans to solve the problems mentioned in the background art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a smart injection molding equipment for trash cans, comprising a base, an injection molding device, a film-forming assembly, and a hydraulic transmission unit. The injection molding device is disposed on one side of the upper end face of the base, the film-forming assembly is installed in the middle of the upper end face of the base, and one side of the assembly is connected to the injection molding device. The hydraulic transmission unit is disposed on the other side of the film-forming assembly.

[0005] A support frame is vertically fixed on the side of the machine base near the injection molding device. A crossbeam is slidably installed on the support frame, and a sorting robot arm is slidably mounted on the crossbeam.

[0006] The film-forming assembly includes a fixed template, a movable template is mounted parallel to one side of the fixed template, four symmetrically distributed outer guide rods are fixed on the movable template, and the outer guide rods are slidably connected to the fixed template. A mold base one is fixed at the center of the fixed template, and a front mold core is rotatably mounted on the mold base one. A mold base two is fixed at the center of the movable template, and a rear mold core is provided inside the mold base two. A swinging device is provided on the movable template.

[0007] Furthermore, as a preferred embodiment, the fixed template is vertically fixed on the machine base near the side of the injection molding device, and four symmetrically distributed inner guide rods are fixed on the mold base one, the inner guide rods being slidably connected to the mold base two;

[0008] Both mold base one and mold base two are equipped with multiple cooling channels.

[0009] Furthermore, as a preferred embodiment, an injection channel is provided in the center of the mold base, one end of the injection channel is sealed and connected to the injection device, and a central injection hole is provided in the front mold core, the central injection hole being sealed and connected to the other end of the injection channel.

[0010] Two side channels are symmetrically distributed on both sides of the injection channel. The front mold core is also provided with multiple side injection holes around its circumference. Each side injection hole is sequentially sealed and connected to the side channel as the front mold core deflects at different angles.

[0011] Furthermore, as a preferred embodiment, the mold base is symmetrically distributed with side flow channels on both sides of the injection channel, a guide tube is slidably installed in the injection channel, a return spring is provided between the guide tube and the mold base, and a side hole is provided on the side wall of the guide tube.

[0012] A valve core is fixed in the center of the injection channel. One end of the valve core extends into the guide tube and slides with the guide tube. A feeding gap is always maintained between the guide tube and the valve core.

[0013] Furthermore, as a preferred embodiment, a torsion spring is provided between the front mold core and the mold base, and the torsion spring controls the front mold core to be inclined relative to the mold base under the action of elastic force;

[0014] A guide pin is vertically fixed on the rotating end sidewall of the front mold core, and an oblique groove is provided on the inner wall of the mold base. The guide pin is slidably connected to the oblique groove.

[0015] Furthermore, as a preferred embodiment, the rear mold core and the mold base are rotatably arranged at two centers; the swing device includes a fixed base with a connecting shaft rotatably connected inside it, one end of the connecting shaft being coaxially connected to the rear mold core, a guide cylinder being rotatably arranged outside the fixed base, and the other end of the connecting shaft being fixed to the guide cylinder;

[0016] A crankshaft is rotatably mounted on the fixed base, a shaft is hinged to the crankshaft, one end of the shaft is slidably connected to the guide cylinder, and a transmission wheel is mounted on the crankshaft.

[0017] Furthermore, as a preferred embodiment, a snap-fit ​​portion is radially extended at one end of the connecting shaft near the rear mold core. The snap-fit ​​portion is rotatably connected to the rear mold core and has an assembly gap. Multiple support springs are distributed within the assembly gap.

[0018] The outer wall of the rear mold core is provided with a limiting groove, and a limiting block is fixed at a corresponding position on the mold base. The cross-section of the limiting block is trapezoidal, and the limiting block slides in conjunction with the limiting groove.

[0019] Furthermore, as a preferred embodiment, the mold base two has a hydraulic annular cavity, and the inner wall of the rear mold core has hydraulic channels distributed therein, the hydraulic channels being sealed and connected to the hydraulic annular cavity; a push rod is slidably connected to the hydraulic channels via a piston, and a material block is slidably disposed in the inner wall of the rear mold core.

[0020] Furthermore, as a preferred embodiment, the upper end of the material block is provided with an oblique protrusion, and the top rod is provided with a slot, the slot being in sliding contact with the oblique protrusion, and the contact surface being an oblique structure; an inner spring is sleeved on the top rod.

[0021] Furthermore, as a preferred embodiment, a hydraulic chamber is provided inside the fixed seat, a piston rod is slidably disposed in the hydraulic chamber, a cam is fixed on the crankshaft rod, and the cam is connected to the piston rod through a support rod;

[0022] The hydraulic chamber is externally sealed with a rotating pipe, the other end of which is connected to the hydraulic annular cavity.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] In this invention, the front mold core, rotatably mounted on the mold base, is installed within the mold assembly. During initial injection molding, it tilts and engages with the rear mold core, ensuring the plastic material fully fills the corners and openings of the rear mold core. This significantly reduces the resistance to the plastic flowing into deep cavities, narrow gaps, or complex corner areas. After initial injection molding, the front and rear mold cores gradually and tightly press together as the moving template moves. The front mold core is then gradually rotated and reset by the sliding action of the guide pin and the inclined groove, fully squeezing out excess material at the corners of the rear mold core, achieving micro-extrusion molding during the injection process. During this process, the rear mold core continuously swings forward and backward with the swing device, which helps to force out gas trapped in deep cavities, corners, or weld lines, achieving efficient and intelligent injection molding. Furthermore, it improves the filling effect of the plastic material, enhancing the overall quality after injection molding and avoiding injection defects caused by insufficient injection pressure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the membrane assembly in this invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the membrane assembly in this invention;

[0028] Figure 4 This is a schematic diagram of the mounting structure of the front mold core in this invention;

[0029] Figure 5This is a schematic diagram of the internal structure of the front mold core in this invention;

[0030] Figure 6 This is a schematic diagram of the swing device in the present invention;

[0031] Figure 7 This is a schematic diagram of the connecting shaft structure in this invention;

[0032] Figure 8 This is a schematic diagram of the limiting block in this invention;

[0033] Figure 9 This is a schematic diagram of the hydraulic annular cavity in this invention;

[0034] In the diagram: 1. Machine base; 11. Injection molding device; 12. Hydraulic transmission unit; 13. Support frame; 14. Sorting robotic arm; 2. Film closing assembly; 21. Fixed mold plate; 22. Moving mold plate; 23. Outer guide rod; 24. Cooling channel; 3. Inner guide rod; 31. Mold base one; 32. Mold base two; 33. Front mold core; 34. Rear mold core; 35. Limiting groove; 36. Limiting block; 4. Swinging device; 41. Fixed base; 42. 43. Coupling; 44. Guide cylinder; 45. Crankshaft rod; 46. Drive wheel; 47. Support spring; 48. Piston rod; 49. Cam; 40. Support rod; 410. Rotary tube; 5. Injection channel; 51. Center injection hole; 52. Bypass channel; 53. Side flow channel; 54. Guide tube; 55. Side hole; 56. Valve core; 67. Hydraulic ring cavity; 61. Hydraulic channel; 62. Push rod; 63. Material block; 64. Slanted protrusion. Detailed Implementation

[0035] Please see Figures 1-9 In this embodiment of the invention, a smart injection molding equipment for trash cans includes a base 1, an injection molding device 11, a mold-closing assembly 2, and a hydraulic transmission unit 12. The injection molding device 11 is disposed on one side of the upper end face of the base 1. The mold-closing assembly 2 is installed in the middle of the upper end face of the base 1, and one side of it is connected to the injection molding device 11. The hydraulic transmission unit 12 is disposed on the other side of the mold-closing assembly 2. The hydraulic transmission unit 12 can provide mold-closing and demolding power to the mold-closing assembly 2.

[0036] A support frame 13 is vertically fixed on the side of the machine base 1 near the injection molding device 11. A crossbeam is slidably installed on the support frame 13. A sorting robot arm 14 is slidably mounted on the crossbeam. The sorting robot arm 14 can remove the injection-molded trash can from the film assembly 2 by suction cup, realizing the production demolding operation.

[0037] The film-forming assembly 2 includes a fixed template 21, a movable template 22 is mounted parallel to one side of the fixed template 21, and four symmetrically distributed outer guide rods 23 are fixed on the movable template 22. The outer guide rods 23 are slidably connected to the fixed template 21. A mold base 31 is fixed at the center of the fixed template 21, and a front mold core 33 is rotatably mounted on the mold base 31. A mold base 32 is fixed at the center of the movable template 22, and a rear mold core 34 is provided inside the mold base 32. A swing device 4 is provided on the movable template 22. The front mold core 33 and the rear mold core 34 can form an injection cavity after they are fitted together. The injection plastic is injected into the injection cavity to realize the injection molding of the trash can.

[0038] In this embodiment, the fixed template 21 is vertically fixed on the machine base 1 on one side near the injection molding device 11, and four symmetrically distributed inner guide rods 3 are fixed on the mold base 1 31. The inner guide rods 3 are slidably connected to the mold base 2 32.

[0039] Both mold base 1 31 and mold base 2 32 are provided with multiple cooling channels 24 for conveying coolant after injection molding to achieve injection molding cooling molding.

[0040] In a preferred embodiment, an injection channel 5 is provided in the center of the mold base 31. One end of the injection channel 5 is sealed and connected to the injection device 11, and a central injection hole 51 is provided in the front mold core 33. The central injection hole 51 is sealed and connected to the other end of the injection channel 5. The central injection hole 51 can deliver the injection plastic from the middle so that the injection plastic flows and diffuses from the center of the injection cavity and fills the bottom of the injection cavity, thereby achieving bottom filling and molding of the trash can.

[0041] Two side channels 52 are symmetrically distributed on both sides of the injection channel 5. The front mold core 33 is also circumferentially provided with multiple side injection holes. Each side injection hole is sequentially sealed and connected to the side channel 52 as the front mold core 33 deflects at different angles. That is to say, when the front mold core 33 is set at different tilt angles, the side injection hole at the corresponding position can be connected to the side channel 52, and the injection plastic can flow out from the corresponding side injection hole. This can avoid the fixed melt flow direction caused by a single gate during the injection process, which can easily form a flow dead zone in the injection cavity and reduce the filling pressure. Therefore, the present invention dynamically activates the injection holes at symmetrical positions according to the mold core angle, realizes intelligent pressure compensation injection for low-pressure areas in the middle and late stages of filling, and makes the pressure distribution of the injection cavity tend to be balanced.

[0042] In this embodiment, side flow channels 53 are symmetrically distributed on both sides of the injection channel 5 inside the mold base 31. A guide tube 54 is slidably installed inside the injection channel 5. A reset spring is provided between the guide tube 54 and the mold base 31, and a side hole 55 is provided on the side wall of the guide tube 54.

[0043] A valve core 56 is fixed in the center of the injection channel 5. One end of the valve core 56 extends into the guide tube 54 and slides with it. A feeding gap is always maintained between the guide tube 54 and the valve core 56. When the side hole 55 on the guide tube 54 is connected to the side flow channel 53, the injection plastic can flow into the injection cavity through the side flow channel 53, or through the central injection hole 51 and the side injection hole, achieving rapid injection filling, which is suitable for the initial filling stage of complex structures. When the injection pressure is increased, the guide tube 54 is pushed and the side hole 55 and the side flow channel 53 are misaligned. At this time, the injection plastic flows into the injection cavity only through the central injection hole 51 and the side injection hole. Therefore, the injection pressure can be adjusted according to different injection stages during the injection process, which can not only adjust the flow filling effect of the injection plastic in the injection cavity, but also automatically switch the flow mode according to the filling state of the injection cavity.

[0044] In this embodiment, a torsion spring (not shown in the figure) is provided between the front mold core 33 and the mold base 31. The torsion spring controls the front mold core 33 to be inclined relative to the mold base 31 under the action of elastic force.

[0045] A guide pin (not shown in the figure) is vertically fixed on the rotating end side wall of the front mold core 33. An inclined groove is opened on the inner wall of the mold base 32. The guide pin is slidably connected to the inclined groove, which can realize the rotation and reset of the front mold core 33. It should be noted that in the initial injection molding, the front mold core 33 and the rear mold core 34 are not fully fitted, and there is a sliding fit gap. At this time, the volume of the injection cavity is larger than the volume during molding. After the gradual injection molding is completed, the rear mold core 34 gradually and fully fits the front mold core 33 under the drive of the hydraulic transmission unit 12. At this time, the front mold core 33 can also rotate and reset, and fully squeeze the remaining material in the injection cavity to realize micro-extrusion molding in the injection molding process.

[0046] In this embodiment, the rear mold core 34 is rotatably disposed at the center of the mold base 32; the swing device 4 includes a fixed base 41, which is rotatably connected to a connecting shaft 42. One end of the connecting shaft 42 is coaxially connected to the rear mold core 34, and a guide cylinder 43 is rotatably disposed outside the fixed base 41. The other end of the connecting shaft 42 is fixed to the guide cylinder 43.

[0047] A crankshaft 44 is rotatably mounted on the fixed base 41. A shaft is hinged to the crankshaft 44, and one end of the shaft is slidably connected to the guide cylinder 43. A transmission wheel 45 is mounted on the crankshaft 44, and the transmission wheel 45 is connected to an external drive device through a transmission belt to maintain the continuous rotation of the crankshaft 44. During rotation, the crankshaft 44 can achieve the micro-angle reciprocating deflection of the guide cylinder 43 through the sliding action between the shaft and the guide cylinder 43.

[0048] In a preferred embodiment, a snap-fit ​​portion is radially distributed on one end of the connecting shaft 42 near the rear mold core 34. The snap-fit ​​portion is rotatably connected to the rear mold core 34 and has an assembly gap. A plurality of support springs 46 are distributed in the assembly gap.

[0049] The outer wall of the rear mold core 34 is provided with a limiting groove 35, and a limiting block 36 is fixed at a corresponding position on the mold base 31. The cross-section of the limiting block 36 is trapezoidal, and the limiting block 36 slides with the limiting groove. That is to say, after the initial injection molding, as the rear mold core 34 gradually engages with the front mold core 33 under the drive of the hydraulic transmission unit 12, the swing angle of the rear mold core 34 gradually decreases due to the limiting effect of the limiting block 36 and the limiting groove, while the compression deformation of the support spring 46 increases until the rear mold core 34 finally maintains a stable state.

[0050] In this embodiment, a hydraulic annular cavity 6 is provided inside the mold base 32, and hydraulic channels 61 are distributed in the inner wall of the rear mold core 34. The hydraulic channels 61 are sealed and connected to the hydraulic annular cavity 6 (since there is a rotational connection between the rear mold core 34 and the mold base 32, the hydraulic channels 61 need to be tightly fitted with the hydraulic annular cavity 6 to avoid leakage; or a hose structure can be provided between them to assist in the connection). A push rod 62 is slidably connected to the hydraulic channel 61 through a piston, and a material block 63 is slidably arranged in the inner wall of the rear mold core 34. A compression spring is provided outside the material block 63.

[0051] In this embodiment, the upper end of the material block 63 is provided with an inclined protrusion 64, and the ejector rod 62 is provided with a slot. The slot and the inclined protrusion 64 are in sliding contact, and their contact surface is an inclined structure. An inner spring is sleeved on the ejector rod 62. Multiple material blocks 63 can be arranged along the axial direction of the ejector rod 62. The hydraulic channel 61 is filled with hydraulic oil, which can hydraulically push the ejector rod 62 to slide. During the sliding process, the ejector rod 62 makes the material block 63 and the inner wall of the molded mold core 34 shrink or become flush during the sliding contact between the slot and the inclined protrusion 64. Therefore, during the injection molding process, the material block 63 can be assisted in the extrusion of the injection plastic from multiple positions, which promotes the full flow of the injection plastic and further improves the injection molding effect.

[0052] A hydraulic chamber is provided in the fixed seat 41, and a piston rod 47 is slidably arranged in the hydraulic chamber. A cam 48 is fixed on the crankshaft rod 44, and the cam 48 is connected to the piston rod 47 through a support rod 49.

[0053] The hydraulic chamber is externally sealed with a rotary pipe 410, the other end of which is connected to the hydraulic ring chamber 6. The cam 48 can rotate through the support rod 49 to move the piston rod 47 axially back and forth in the hydraulic chamber so that the hydraulic oil in the hydraulic chamber can enter the hydraulic ring chamber 6.

[0054] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A smart injection molding equipment for trash cans, comprising a base (1), an injection molding device (11), a film-forming assembly (2), and a hydraulic transmission unit (12), characterized in that, The injection molding device (11) is located on one side of the upper end face of the machine base (1), the film-forming assembly (2) is installed in the middle of the upper end face of the machine base (1), and one side of it is connected to the injection molding device (11). The hydraulic transmission unit (12) is located on the other side of the film-forming assembly (2). A support frame (13) is vertically fixed on the side of the machine base (1) near the injection molding device (11). A crossbeam is slidably installed on the support frame (13), and a sorting robot arm (14) is slidably mounted on the crossbeam. The film assembly (2) includes a fixed template (21), a movable template (22) is mounted parallel to one side of the fixed template (21), four symmetrically distributed outer guide rods (23) are fixed on the movable template (22), the outer guide rods (23) are all slidably connected to the fixed template (21), a mold base one (31) is fixed at the center of the fixed template (21), a front mold core (33) is rotatably mounted on the mold base one (31), a mold base two (32) is fixed at the center of the movable template (22), a rear mold core (34) is provided in the mold base two, and a swing device (4) is provided on the movable template (22); The mold base (31) has an injection channel (5) in the center. One end of the injection channel (5) is sealed and connected to the injection device (11). The front mold core (33) has a central injection hole (51) in the center. The central injection hole (51) is sealed and connected to the other end of the injection channel (5). The injection channel (5) has two side channels (52) symmetrically distributed on both sides. The front mold core (33) also has multiple side injection holes arranged circumferentially. Each side injection hole is sealed and connected to the side channel (52) in turn as the front mold core (33) deflects at different angles. The mold base (31) is also symmetrically distributed with side flow channels (53) on both sides of the injection channel (5). A guide tube (54) is slidably installed in the injection channel (5). A reset spring is provided between the guide tube (54) and the mold base (31), and a side hole (55) is opened on the side wall of the guide tube (54). A torsion spring is provided between the front mold core (33) and the mold base (31), and the torsion spring controls the front mold core (33) to be inclined relative to the mold base (31) under the action of elastic force; A guide pin is vertically fixed on the rotating end side wall of the front mold core (33), and an inclined groove is opened on the inner wall of the mold base (32), and the guide pin is slidably connected to the inclined groove. The rear mold core (34) is rotatably disposed at the center of the mold base (32); the swing device (4) includes a fixed base (41), which is rotatably connected to a connecting shaft (42). One end of the connecting shaft (42) is coaxially connected to the rear mold core (34). A guide cylinder (43) is rotatably disposed outside the fixed base (41), and the other end of the connecting shaft (42) is fixed to the guide cylinder (43). A crankshaft rod (44) is rotatably mounted on the fixed base (41). A shaft is hinged to the crankshaft rod (44). One end of the shaft is slidably connected to the guide cylinder (43). A transmission wheel (45) is mounted on the crankshaft rod (44).

2. The intelligent injection molding equipment for trash cans according to claim 1, characterized in that: The fixed template (21) is vertically fixed on the machine base (1) on one side near the injection molding device (11). Four symmetrically distributed inner guide rods (3) are fixed on the mold base one (31). The inner guide rods (3) are slidably connected to the mold base two (32). Both mold base one (31) and mold base two (32) are provided with multiple cooling channels (24).

3. The intelligent injection molding equipment for trash cans according to claim 1, characterized in that: A valve core (56) is fixed in the center of the injection channel (5). One end of the valve core (56) extends into the guide tube (54) and slides with the guide tube (54). There is always a feeding gap between the guide tube (54) and the valve core (56).

4. The intelligent injection molding equipment for trash cans according to claim 1, characterized in that: The connecting shaft (42) has a radially extending snap-fit ​​portion at one end near the rear mold core (34). The snap-fit ​​portion is rotatably connected to the rear mold core (34) and has an assembly gap. Multiple support springs (46) are distributed in the assembly gap. The outer wall of the rear mold core (34) is provided with a limiting groove (35), and a limiting block (36) is fixed at the corresponding position on the mold base (31). The cross-section of the limiting block (36) is trapezoidal, and the limiting block (36) slides with the limiting groove.

5. The intelligent injection molding equipment for trash cans according to claim 1, characterized in that: The mold base (32) has a hydraulic ring cavity (6) inside, and the inner wall of the rear mold core (34) has hydraulic channels (61) distributed therein. The hydraulic channels (61) are sealed and connected to the hydraulic ring cavity (6). The hydraulic channel (61) is slidably connected to the push rod (62) through the piston, and the inner wall of the rear mold core (34) has a material block (63) slidably disposed therein.

6. The intelligent injection molding equipment for trash cans according to claim 5, characterized in that: The upper end of the material block (63) is provided with a slanted protrusion (64), and the top rod (62) is provided with a slot. The slot is in sliding contact with the slanted protrusion (64), and the contact surface is a slanted structure. An inner spring is sleeved on the top rod (62).

7. The intelligent injection molding equipment for trash cans according to claim 1, characterized in that: A hydraulic chamber is provided in the fixed seat (41), and a piston rod (47) is slidably arranged in the hydraulic chamber. A cam (48) is fixed on the crankshaft rod (44), and the cam (48) is connected to the piston rod (47) through a support rod (49). The hydraulic chamber is externally sealed with a rotating pipe (410), and the other end of the rotating pipe (410) is connected to the hydraulic ring chamber (6).

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