Injection mold ejection mechanism capable of avoiding deformation of injection molded part

Abstract

The utility model discloses an injection mold ejection mechanism capable of avoiding deformation of an injection molded part, which relates to the technical field of injection molding processing equipment and comprises a workbench and the like, the workbench is rotatably connected with a turntable, the turntable is fixedly connected with paired mounting plates, the mounting plates are fixedly connected with injection molding ports, the mounting plates are slidably connected with an upper shell, and the upper shell is fixedly connected with a frame body. The frame body is fixedly connected with paired temperature control rods, the upper shell is fixedly connected with a breathable plate, the breathable plate is in sliding connection with a baffle, the upper shell is fixedly connected with paired electromagnets, the baffle is fixedly connected with paired magnetic plates, and a jacking assembly is arranged on the workbench. Through the baffle, the electromagnet and other parts, the air permeable plate can be opened when molten plastic is injected, air in the upper shell is exhausted from the air permeable plate, bubbles are prevented from being generated in an injection molding part, the air permeable plate can be closed when the injection molding part is cooled and solidified, and the influence of the external environment on the cooling rate of all parts of the injection molding part is avoided; therefore, deformation of the injection molding part due to difference of internal stress is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding processing equipment, in particular to an ejection mechanism of an injection mold that can avoid deformation of injection molded parts. Background Art

[0002] Injection molding is an industrial production process commonly used in the manufacturing of plastic products. It uses an injection molding machine to convert thermoplastic or thermosetting plastics from a solid state to a molten state, and then injects them into a mold, where they cool and solidify to form various shapes and sizes of plastic parts.

[0003] In the patent with the publication number CN211221897U, an ejection mechanism and an injection mold are disclosed. Among them, the ejection mechanism includes: a mounting seat and an ejecting structure. The ejecting structure includes a driving device and an ejecting assembly connected to the driving device. The ejecting assembly is provided with ejector pins and a first limiting member arranged at intervals. The ejector pins are movably inserted through the mounting seat, and the first limiting member is located on one side of the mounting seat. The driving device drives the ejecting assembly to approach or move away from the mounting seat, so that the first limiting member abuts against the mounting seat, and the ejector pins partially pass through the mounting seat. The structure of the ejection mechanism proposed by this utility model is simple, which can reduce the design and mold opening costs of the injection mold. However, before ejecting the injection molded part, it is necessary to cool and solidify the high-temperature plastic. Currently, existing injection molds usually use a water cooling cycle or other cooling systems for cooling. And because there are usually vent holes or vent plates for gas discharge on the injection mold, when cooling the injection molded part, it is very easy to be affected by the external environment, resulting in uneven cooling rates at various parts of the injection molded part, thus causing differences in internal stress of the injection molded part and deformation.

[0004] Based on the above situation, the utility model proposes an ejection mechanism of an injection mold that can avoid deformation of injection molded parts. Summary of the Utility Model

[0005] In order to overcome the shortcomings that existing injection molds usually use a water cooling cycle or other cooling systems for cooling, and because there are usually vent holes or vent plates for gas discharge on the injection mold, when cooling the injection molded part, it is very easy to be affected by the external environment, resulting in uneven cooling rates at various parts of the injection molded part, thus causing differences in internal stress of the injection molded part and deformation, the utility model provides an ejection mechanism of an injection mold that can avoid deformation of injection molded parts.

[0006] The invention relates to an injection mold ejection mechanism that can avoid deformation of injection molded parts, comprising a workbench, a turntable, a mounting plate, an injection molding port, a guide frame, an upper shell, a sliding frame, a frame, a temperature control rod, a breathable plate, a baffle, a guide rod, an electromagnet, a magnetic plate and a ejection assembly. The workbench is rotatably connected to the turntable, the turntable is fixedly connected to a pair of mounting plates, the mounting plate is fixedly connected to the injection molding port, the mounting plate is fixedly connected to a pair of guide frames, the mounting plate is slidably connected to the upper shell, the upper shell is fixedly connected to a pair of sliding frames, the sliding frames are slidably connected to the guide frames, the upper shell is fixedly connected to the frame, the frame is fixedly connected to a pair of temperature control rods, the upper shell is fixedly connected to the breathable plate, the breathable plate is slidably connected to the baffle, the upper shell is fixedly connected to a pair of guide rods, the baffle is slidably connected to the guide rods, the upper shell is fixedly connected to a pair of electromagnets, the baffle is fixedly connected to a pair of magnetic plates, the magnetic plates and the electromagnets are magnetically matched, and a ejection assembly is provided on the workbench.

[0007] As a preferred technical solution of the utility model, the ejection assembly includes a cylinder, a contact frame, an ejection frame, a spring and an ejection assembly. The workbench is fixedly connected to the cylinder, the mounting plate is slidably connected to the contact frame, the telescopic end of the cylinder is extruded and fitted with the contact frame, the contact frame is fixedly connected to the ejection frame, the ejection frame is slidably connected to the mounting plate, the ejection frame is extruded and fitted with the upper shell, a pair of springs are fixed between the ejection frame and the mounting plate, and the ejection assembly is provided on the upper shell.

[0008] As a preferred technical solution of the present invention, the ejection assembly includes an electric push rod and a push plate, the upper shell is fixedly connected to the electric push rod, and the telescopic end of the electric push rod is fixedly connected to the push plate.

[0009] As a preferred technical solution of the utility model, it also includes alignment blocks, and the upper shell is fixed with a pair of alignment blocks, and the alignment blocks are slidably connected to the mounting plate.

[0010] As a preferred technical solution of the present invention, a cover plate is also included, and the frame is clamped with the cover plate.

[0011] As a preferred technical solution of the utility model, it also includes wiping wheels and torsion springs. The upper shell is rotatably connected to a pair of wiping wheels, and a pair of torsion springs are fixedly connected between the wiping wheels and the upper shell.

[0012] Beneficial effects: 1. The utility model uses components such as baffles and electromagnets to not only open the breathable plate when injecting molten plastic, so that the gas in the upper shell is discharged from the breathable plate to avoid bubbles inside the injection molded part, but also close the breathable plate when the injection molded part is cooled and solidified, avoiding the external environment from affecting the cooling rate of various parts of the injection molded part, thereby effectively avoiding deformation of the injection molded part due to differences in internal stress.

[0013] 2. The utility model uses components such as a wiping wheel and a torsion spring to wipe off residues and flash on the surface of the injection molded part while ejecting it, thereby not only reducing the labor intensity of workers but also effectively improving the quality of the injection molded product. Brief Description of the Drawings

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 This is a sectional three-dimensional structural schematic diagram of the cylinder, guide frame, upper shell, etc. of the present utility model.

[0016] Figure 3 This is a three-dimensional structural schematic diagram of the mounting plate, ejection frame, spring, etc. of the present utility model.

[0017] Figure 4 This is a three-dimensional structural schematic diagram of the mounting plate, injection port, guide frame, etc. of the present utility model.

[0018] Figure 5 This is a three-dimensional structural schematic diagram of the upper shell, frame body, cover plate, etc. of the present utility model.

[0019] Figure 6 This is a sectional three-dimensional structural schematic diagram of the cover plate, temperature control rod, wiping wheel, etc. of the present utility model.

[0020] Figure 7 This is a three-dimensional structural schematic diagram of the wiping wheel and torsion spring of the present utility model.

[0021] Figure 8 This is an exploded three-dimensional structural schematic diagram of the air permeable plate, baffle plate, electromagnet, etc. of the present utility model.

[0022] Wherein: 1 - workbench, 2 - turntable, 3 - cylinder, 4 - contact frame, 5 - mounting plate, 51 - injection port, 6 - ejection frame, 61 - spring, 7 - guide frame, 8 - upper shell, 81 - alignment block, 82 - sliding frame, 83 - electric push rod, 84 - push plate, 9 - frame body, 10 - cover plate, 11 - temperature control rod, 12 - wiping wheel, 121 - torsion spring, 13 - air permeable plate, 14 - baffle plate, 141 - guide rod, 15 - electromagnet, 151 - magnetic plate. Detailed Embodiments

[0023] The following describes the present utility model in detail with reference to the drawings and specific embodiments, but it is not intended to limit the present utility model.

[0024] Embodiment 1

[0025] An ejection mechanism for an injection mold that can avoid deformation of injection molded parts, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8As shown in the figure, it includes a workbench 1, a turntable 2, a mounting plate 5, an injection port 51, a guide frame 7, an upper shell 8, a sliding frame 82, a frame 9, a temperature control rod 11, a ventilation plate 13, a baffle 14, a guide rod 141, an electromagnet 15, a magnetic plate 151 and a jacking assembly. The upper part of the workbench 1 is rotatably connected to the turntable 2. Both the front and rear sides of the top of the turntable 2 are fixedly connected with mounting plates 5. The top of the mounting plate 5 is fixedly connected with an injection port 51. Both the left and right sides of the mounting plate 5 are fixedly connected with guide frames 7 that are symmetrically distributed front and back. The top of the mounting plate 5 is slidably connected with an upper shell 8. Both the left and right sides of the upper shell 8 are fixedly connected with sliding frames 82. The sliding frames 82 are slidably connected with the adjacent guide frames 7. The inside of the upper shell 8 is fixedly connected with a frame 9. Inside the frame 9, two upper and lower temperature control rods 11 are fixedly connected. The top of the upper shell 8 is fixedly connected with a ventilation plate 13. The top of the ventilation plate 13 is slidably connected with a baffle 14. Both the left and right sides of the top of the upper shell 8 are fixedly connected with guide rods 141 that are symmetrically distributed front and back. The baffle 14 is slidably connected with the guide rods 141. Both the left and right sides of the top of the upper shell 8 are fixedly connected with electromagnets 15. Both the left and right sides of the baffle 14 are fixedly connected with magnetic plates 151. The magnetic plates 151 are magnetically engaged with the adjacent electromagnets 15. A jacking assembly is provided on the workbench 1.

[0026] As Figure 2 , Figure 3 and Figure 5 shown, the jacking assembly includes a cylinder 3, a contact frame 4, an ejection frame 6, a spring 61 and a pushing assembly. The cylinder 3 is fixedly connected to the bottom of the front side of the workbench 1. The contact frame 4 is slidably connected to the middle of the mounting plate 5. The telescopic end of the cylinder 3 is in pressing cooperation with the contact frame 4. The top of the contact frame 4 is fixedly connected with an ejection frame 6. The ejection frame 6 is slidably connected to the mounting plate 5. The ejection frame 6 is in pressing cooperation with the upper shell 8. Four evenly distributed springs 61 are fixedly connected between the ejection frame 6 and the mounting plate 5. A pushing assembly is provided on the upper shell 8.

[0027] As Figure 3 and Figure 5 shown, the pushing assembly includes an electric push rod 83 and a push plate 84. The electric push rod 83 is fixedly connected to the front side of the top of the upper shell 8. The telescopic end of the electric push rod 83 is fixedly connected with a push plate 84.

[0028] As Figure 3 shown, it further includes alignment blocks 81. Both the left and right sides of the bottom of the upper shell 8 are fixedly connected with alignment blocks 81 that are symmetrically distributed front and back. The alignment blocks 81 are slidably connected to the mounting plate 5.

[0029] As Figure 5 and Figure 6 shown, it further includes a cover plate 10. The cover plate 10 is snap - connected to the front side of the frame 9.

[0030] When a worker needs to produce an injection-molded part product through an injection mold, molten plastic can be first injected into the upper shell 8 through the injection port 51, and then the electromagnet 15 is activated. Since the electromagnet 15 and the magnetic plate 151 repel each other, the magnetic plate 151 will drive the baffle 14 to move upward under the action of the electromagnet 15 and separate from the air-permeable plate 13. At this time, the baffle 14 no longer blocks the air-permeable plate 13, so the gas in the upper shell 8 will gradually be extruded by the molten plastic, thereby avoiding the presence of gas in the upper shell 8 and causing bubbles in the subsequent injection-molded part. After the injection is completed, the electromagnet 15 is first turned off, and the magnetic plate 151 and the baffle 14 then move downward and reset under the action of gravity and re-block the air-permeable plate 13. Then, the molten plastic is evenly cooled by the temperature control rod 11, so that the molten plastic is gradually cooled and solidified into an injection-molded part. During this period, since the air-permeable plate 13 is blocked, the influence of the external environment on the cooling rate of each part of the injection-molded part can be avoided, thereby effectively preventing the injection-molded part from deforming due to differences in internal stress. When the temperature control rod 11 is damaged, the worker can remove the cover plate 10 and repair or replace the temperature control rod 11. After the injection-molded part is solidified, the turntable 2 is rotated to make the corresponding contact frame 4 rotate directly above the telescopic end of the cylinder 3, and then the cylinder 3 can be activated. The cylinder 3 will push up components such as the contact frame 4 and the ejector frame 6. The spring 61 is immediately compressed, and the upward movement of the ejector frame 6 will push up components such as the upper shell 8 and separate it from the mounting plate 5. At this time, the injection-molded part will adhere to the inside of the upper shell 8. Then, the electric push rod 83 can be activated to drive the push plate 84 to move downward, thereby pushing out the injection-molded part inside the upper shell 8 and making the injection-molded part fall back onto the mounting plate 5. At this time, the worker can first take out the injection-molded part, and then reverse the movement of components such as the contact frame 4, the ejector frame 6, and the push plate 84 through the cylinder 3, the spring 61, and the electric push rod 83 to reset them.

[0031] Embodiment 2

[0032] On the basis of Embodiment 1, as Figure 5 - Figure 7 shown, it further includes a wiping wheel 12 and a torsion spring 121. The wiping wheels 12 are rotatably connected to the front and rear sides and the left and right sides of the lower part of the upper shell 8, and two torsion springs 121 are fixedly connected between the wiping wheels 12 and the upper shell 8.

[0033] When the upper shell 8 drives components such as the wiping wheel 12 to move upward and separate from the mounting plate 5, the four wiping wheels 12 will rotate towards each other under the action of the torsion spring 121. When the electric push rod 83 drives the push plate 84 to move downward and push out the injection molded part in the upper shell 8 downward, the downward movement of the injection molded part will contact and squeeze the wiping wheel 12. At this time, the four wiping wheels 12 will rotate a certain angle away from each other and closely adhere to the surface of the injection molded part under the action of the torsion spring 121. During the downward movement of the injection molded part, the wiping wheel 12 can wipe off the residues and flash on the surface of the injection molded part, thereby effectively improving the quality of the injection molded part product. When the contact frame 4 and the upper shell 8 and other components move downward and reset through the cylinder 3 and the spring 61, it is necessary to make the four wiping wheels 12 rotate away from each other and reset in advance. The torsion spring 121 will then deform, and then the wiping wheel 12 is limited by the mounting plate 5.

[0034] It should be understood that the above description is only for exemplary purposes and does not mean to limit the present invention. Those skilled in the art will understand that the variants of the present invention will be included within the scope of the claims herein.

Claims

1. An ejection mechanism for an injection mold that can avoid deformation of injection molded parts, comprising a workbench (1), a turntable (2), a mounting plate (5), an injection port (51), a guide frame (7), an upper shell (8), a sliding frame (82), a frame body (9), a temperature control rod (11), a ventilation plate (13) and an ejection assembly. The workbench (1) is rotatably connected to the turntable (2). The turntable (2) is fixedly connected with a pair of mounting plates (5). The mounting plate (5) is fixedly connected with an injection port (51). The mounting plate (5) is fixedly connected with a pair of guide frames (7). The mounting plate (5) is slidably connected to the upper shell (8). The upper shell (8) is fixedly connected with a pair of sliding frames (82). The sliding frame (82) is slidably connected to the guide frame (7). The upper shell (8) is fixedly connected with a frame body (9). The frame body (9) is fixedly connected with a pair of temperature control rods (11). The upper shell (8) is fixedly connected with a ventilation plate (13). An ejection assembly is provided on the workbench (1). It is characterized in that, It further includes a baffle (14), guide rods (141), electromagnets (15) and magnetic plates (151). The breathable plate (13) is slidably connected to the baffle (14). The upper shell (8) is fixedly connected with a pair of guide rods (141). The baffle (14) is slidably connected to the guide rods (141). The upper shell (8) is fixedly connected with a pair of electromagnets (15). The baffle (14) is fixedly connected with a pair of magnetic plates (151). The magnetic plates (151) are magnetically engaged with the electromagnets (15).

2. The ejection mechanism of an injection mold capable of avoiding deformation of injection molded parts according to claim 1, characterized in that The jacking assembly includes a cylinder (3), a contact frame (4), an ejecting frame (6), a spring (61) and an ejecting component. The workbench (1) is fixedly connected with the cylinder (3). The mounting plate (5) is slidably connected to the contact frame (4). The telescopic end of the cylinder (3) is in extrusion fit with the contact frame (4). The contact frame (4) is fixedly connected with the ejecting frame (6). The ejecting frame (6) is slidably connected to the mounting plate (5). The ejecting frame (6) is in extrusion fit with the upper shell (8). A pair of springs (61) are fixedly connected between the ejecting frame (6) and the mounting plate (5). An ejecting component is provided on the upper shell (8).

3. The ejection mechanism of an injection mold capable of avoiding deformation of injection molded parts according to claim 2, characterized in that, The ejecting component includes an electric push rod (83) and a push plate (84). The upper shell (8) is fixedly connected with the electric push rod (83). The telescopic end of the electric push rod (83) is fixedly connected with the push plate (84).

4. The ejection mechanism of an injection mold capable of avoiding deformation of injection molded parts according to claim 3, characterized in that, It further includes alignment blocks (81). The upper shell (8) is fixedly connected with a pair of alignment blocks (81). The alignment blocks (81) are slidably connected to the mounting plate (5).

5. The ejection mechanism of an injection mold capable of avoiding deformation of injection molded parts according to claim 4, characterized in that, It further includes a cover plate (10). The frame (9) is snap-connected with the cover plate (10).

6. The ejection mechanism of an injection mold capable of avoiding deformation of injection molded parts according to claim 5, characterized in that, It further includes wiping wheels (12) and torsion springs (121). The upper shell (8) is rotatably connected with a pair of wiping wheels (12). A pair of torsion springs (121) are fixedly connected between the wiping wheels (12) and the upper shell (8).

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