Injection molding machine raw material inlet and outlet expansion mechanism

Abstract

The utility model belongs to the technical field of injection molding machines, and particularly relates to an injection molding machine raw material inlet and outlet expansion mechanism which comprises a connecting flange fixedly communicated with an injection molding machine raw material inlet and outlet butt flange, a corrugated pipe fixedly communicated with the surface of one side of the connecting flange, and a telescopic expansion mechanism arranged on the outer surface of the corrugated pipe. The telescopic expansion mechanism comprises telescopic blocks distributed on one side of the corrugated pipe in an annular array mode, the multiple telescopic blocks drive the corrugated pipe to be unfolded when horizontally moving, and plastic particles in gaps in the inner surface of the corrugated pipe are made to fall off. According to the raw material inlet and outlet expansion mechanism of the injection molding machine, the two sections of sliding sleeves are connected to the two ends of the supporting pipe in a sleeving mode, stretching and expansion movement of the corrugated pipe can be achieved along with horizontal movement of the sliding sleeves on the outer surface of the supporting pipe, plastic particles fall off from cracks and are sucked away in time, and therefore retention and oxidation are avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a raw material inlet and outlet expansion mechanism for injection molding machines. Background Technology

[0002] Injection molding machines are widely used to manufacture plastic parts. They form plastic parts by heating plastic raw materials to a molten state and injecting them into a mold under high pressure. The raw material inlet and outlet system of an injection molding machine is one of its core components. It is responsible for feeding the plastic raw materials into the heating device and pushing the molten plastic into the mold, ensuring a stable and efficient production process.

[0003] Chinese patent CN219028273U discloses an injection molding machine with convenient material feeding. It has a lifting control mechanism that can automatically open the outlet at the connecting pipe when the material inside the feeding box is insufficient, so that the material inside the storage box can enter the feeding box without the need for staff to control the material feeding.

[0004] Although the aforementioned injection molding machine can be used normally, it still has many shortcomings in actual use. For example, the plastic granules are all drawn into the hopper of the injection molding machine through a straight corrugated pipe for processing. The corrugated pipe is used to adapt to the pressure of the plastic granules being drawn in. However, when the suction pressure is low or when the machine is about to stop, some plastic granules will remain on the inner surface of the material conveying port of the corrugated pipe. Over time, the plastic granules will oxidize and discolor, thus affecting the production of the product. Therefore, the present invention solves the above-mentioned technical problems. Utility Model Content

[0005] Based on the aforementioned technical problems, this utility model proposes a material inlet and outlet expansion mechanism for injection molding machines.

[0006] This utility model proposes a material inlet / outlet expansion mechanism for an injection molding machine, including a connecting flange that is fixedly connected to the material inlet / outlet flange of the injection molding machine. A corrugated pipe is fixedly connected to one side surface of the connecting flange. A telescopic expansion mechanism is provided on the outer surface of the corrugated pipe. The telescopic expansion mechanism includes telescopic blocks arranged in a ring array on one side of the corrugated pipe. When the multiple telescopic blocks move horizontally, they drive the corrugated pipe to expand and cause plastic particles in the gaps on the inner surface of the corrugated pipe to fall off.

[0007] Preferably, the telescopic expansion mechanism further includes a sliding sleeve fixedly connected to the outer surface of the free end of the corrugated pipe. The corrugated pipe, the connecting flange, and the sliding sleeve are arranged in two sets opposite to each other, and the connecting flange in one set is fixedly connected to the conveying pipe of the plastic particles through another mating flange.

[0008] The above technical solution involves conveying plastic granules into the injection molding machine via a connected corrugated pipe. However, when the suction pressure is low or the machine is about to stop, some plastic granules may remain on the inner surface of the material conveying port of the corrugated pipe. Over time, the plastic granules will oxidize and discolor, affecting the production of the product. Therefore, to avoid the retention of plastic granules, the corrugated pipe is intermittently stretched to expand it, allowing the plastic granules to fall out of the gap and be promptly sucked away. Thus, by moving two opposing sliding sleeves horizontally, the two sections of the corrugated pipe can be stretched and expanded, thereby completing the release of the plastic granules.

[0009] Preferably, the telescopic expansion mechanism further includes a support tube, the two ends of which are movably inserted into the inner surfaces of the two sliding sleeves, and the outer surfaces of both ends of the support tube are fixedly fitted with limit rings, the outer surfaces of the limit rings being slidably connected to the inner surfaces of the sliding sleeves.

[0010] With the above technical solution, in order to support the expansion and contraction of the two corrugated pipe sections, two sliding sleeves are fitted onto both ends of the support pipe. As the sliding sleeves move horizontally on the outer surface of the support pipe, the expansion and contraction of the corrugated pipe can be achieved.

[0011] Preferably, the telescopic expansion mechanism further includes bidirectional threaded rods arranged in a ring array on the outer surfaces of the two bellows, and a plurality of telescopic blocks are threaded onto the outer surfaces of the corresponding bidirectional threaded rods. The two ends of the bidirectional threaded rods are respectively rotatably connected to the extension lug surfaces of the two connecting flanges.

[0012] In order to achieve automatic intermittent expansion and contraction of the two corrugated pipes through the above technical solution, multiple bidirectional threaded rods are rotated synchronously, thereby causing the two sets of expansion blocks to move synchronously relative to each other at both ends of the bidirectional threaded rods, which in turn drives the sliding sleeve to slide and adjust on the outer surface of the support pipe.

[0013] Preferably, the telescopic expansion mechanism further includes support ear plates that are fixedly connected to the outer surface of the middle part of the support tube in a ring array, and the outer surface of the middle part of the bidirectional threaded rod is rotatably connected to the surface of the support ear plates through a bearing.

[0014] Through the above technical solution, in order for the support tube to play a supporting role as a support system, the support lugs extending from its outer surface support the rotation of the bidirectional threaded rod, thereby making the tensile and expansion movements of the entire bellows smooth.

[0015] Preferably, the telescopic expansion mechanism further includes pulleys fixedly sleeved on the outer surfaces of the four bidirectional threaded rods, with a transmission belt drivingly connected to the outer surface of the pulleys, and a servo motor fixedly connected to the outer surface of one of the connecting flanges via a mounting block, the servo motor driving one of the bidirectional threaded rods to rotate via a bevel gear set.

[0016] In order to drive the four bidirectional threaded rods to rotate and ultimately achieve the expansion and contraction adjustment of the bellows, the servo motor first drives one of the bidirectional threaded rods to rotate through the bevel gear set, and then the rotation of the four bidirectional threaded rods is achieved through the transmission of the pulley and the transmission belt, thereby realizing the movement of the telescopic block on the outer surface of the bidirectional threaded rod.

[0017] Preferably, the corrugated pipe is made of polyurethane, and the sliding sleeve and the support pipe are made of polycarbonate.

[0018] Through the above technical solution, in order to realize the expansion and contraction adjustment of the corrugated pipe, its material is polyurethane, so that the corrugated pipe can not only adapt to the suction pressure of the injection molding machine, but also facilitate the subsequent deformation adjustment. In order to support the stretching and expansion process, the sliding sleeve and the support tube are made of rigid polycarbonate, which is a plastic with high strength and high impact toughness, thus facilitating the operation of the injection molding machine.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. By setting up a telescopic expansion mechanism, plastic particles can be prevented from oxidizing inside the corrugated pipe and affecting product quality. During the adjustment process, by connecting two sliding sleeves to both ends of the support pipe, the corrugated pipe can be stretched and expanded as the sliding sleeves move horizontally on the outer surface of the support pipe, so that the plastic particles can fall out of the gap and be sucked away in time, thereby avoiding retention and oxidation.

[0021] 2. By setting the material of the bellows to polyurethane and the material of the sliding sleeve and support tube to polycarbonate, the bellows can not only adapt to the suction pressure of the injection molding machine, but also facilitate the subsequent deformation adjustment, and provide support during the deformation adjustment process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a material inlet / outlet expansion mechanism for an injection molding machine according to the present invention;

[0023] Figure 2 This is a perspective view of the support tube structure of the raw material inlet and outlet expansion mechanism of an injection molding machine proposed in this utility model;

[0024] Figure 3This utility model provides a perspective view of the telescopic block structure of a material inlet / outlet expansion mechanism for an injection molding machine.

[0025] Figure 4 This is a three-dimensional view of the servo motor structure of the raw material inlet and outlet expansion mechanism of an injection molding machine proposed in this utility model.

[0026] In the diagram: 1. Connecting flange; 2. Bellows; 3. Telescopic block; 4. Sliding sleeve; 5. Support pipe; 6. Limiting ring; 7. Bidirectional threaded rod; 8. Support ear plate; 9. Pulley; 10. Transmission belt; 11. Servo motor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figures 1-4 An expansion mechanism for the raw material inlet and outlet of an injection molding machine includes a connecting flange 1 that is fixedly connected to the docking flange for the raw material inlet and outlet of the injection molding machine. A bellows 2 is fixedly connected to one side surface of the connecting flange 1. A telescopic expansion mechanism is provided on the outer surface of the bellows 2. The telescopic expansion mechanism includes telescopic blocks 3 arranged in a ring array on one side of the bellows 2. When the multiple telescopic blocks 3 move horizontally, they drive the bellows 2 to expand and cause plastic particles in the gaps on the inner surface of the bellows 2 to fall off.

[0029] Generally, plastic granules are pumped into the injection molding machine through a connected corrugated pipe 2. However, when the suction pressure is low or when the machine is about to stop, some plastic granules will remain on the inner surface of the conveying port of the corrugated pipe 2. Over time, the plastic granules will oxidize and discolor, thus affecting the production of the product. Therefore, in order to avoid the retention of plastic granules, the corrugated pipe 2 is intermittently stretched to expand it, so that the plastic granules can fall out of the gap and be sucked away in time. Therefore, the telescopic expansion mechanism also includes a sliding sleeve 4 fixedly connected to the outer surface of the free end of the corrugated pipe 2. The corrugated pipe 2, the connecting flange 1 and the sliding sleeve 4 are arranged in two sets opposite to each other. The connecting flange 1 in one set is fixedly connected to the conveying pipe of the plastic granules through another connecting flange. By moving the two opposite sliding sleeves 4 horizontally, the two sections of the corrugated pipe 2 can be stretched and expanded, thereby completing the release of the plastic granules.

[0030] To support the telescopic expansion of the two corrugated pipe sections 2, the telescopic expansion mechanism also includes a support pipe 5. The two ends of the support pipe 5 are respectively movably inserted into the inner surfaces of the two sliding sleeves 4, and the outer surfaces of both ends of the support pipe 5 are fixedly fitted with limit rings 6. The outer surface of the limit rings 6 is slidably connected to the inner surface of the sliding sleeves 4. The two sliding sleeves 4 are fitted onto the two ends of the support pipe 5. As the sliding sleeves 4 move horizontally on the outer surface of the support pipe 5, the telescopic expansion of the corrugated pipe 2 can be realized.

[0031] In order to realize the automatic intermittent expansion and contraction of the two corrugated pipes 2, the expansion and contraction mechanism also includes bidirectional threaded rods 7 arranged in a ring array on the outer surface of the two corrugated pipes 2. Multiple expansion blocks 3 are threaded onto the outer surface of the corresponding bidirectional threaded rods 7. The two ends of the bidirectional threaded rods 7 are respectively rotatably connected to the extension ear plate surface of the two connecting flanges 1. By rotating the multiple bidirectional threaded rods 7 synchronously, the two sets of expansion blocks 3 move synchronously relative to each other at the two ends of the bidirectional threaded rods 7, thereby driving the sliding sleeve 4 to slide and adjust on the outer surface of the support pipe 5.

[0032] In order for the support tube 5 to play a supporting role as a support system, the telescopic expansion mechanism also includes support ear plates 8 that are fixedly connected to the outer surface of the middle part of the support tube 5 in a ring array. The outer surface of the middle part of the bidirectional threaded rod 7 is rotatably connected to the surface of the support ear plate 8 through a bearing. The support ear plate 8 extending from its outer surface supports the rotation of the bidirectional threaded rod 7, thereby making the stretching and expansion movement of the entire bellows 2 smooth.

[0033] In order to drive the four bidirectional threaded rods 7 to rotate and ultimately realize the expansion and contraction adjustment of the bellows 2, the expansion and contraction mechanism also includes a pulley 9 fixedly sleeved on the outer surface of the four bidirectional threaded rods 7. The outer surface of the pulley 9 is connected to a transmission belt 10. The outer surface of one of the connecting flanges 1 is fixedly connected to a servo motor 11 through a mounting block. The servo motor 11 drives one of the bidirectional threaded rods 7 to rotate through a bevel gear set. First, the servo motor 11 drives one of the bidirectional threaded rods 7 to rotate through the bevel gear set, and then the rotation of the four bidirectional threaded rods 7 is realized through the transmission of the pulley 9 and the transmission belt 10, thereby realizing the movement of the expansion block 3 on the outer surface of the bidirectional threaded rods 7.

[0034] To enable the bellows 2 to expand and contract, the bellows 2 is made of polyurethane, which allows it to adapt to the suction pressure of the injection molding machine and facilitates subsequent deformation adjustment. In order to provide support during the stretching and expansion process, the sliding sleeve 4 and the support tube 5 are made of polycarbonate, which is a plastic with high strength and high impact toughness, thus facilitating the operation of the injection molding machine.

[0035] By setting up a telescopic expansion mechanism, plastic particles can be prevented from oxidizing inside the corrugated pipe 2, thus affecting product quality. During the adjustment process, by connecting two sliding sleeves 4 to both ends of the support pipe 5, the corrugated pipe 2 can be stretched and expanded as the sliding sleeves 4 move horizontally on the outer surface of the support pipe 5, so that the plastic particles can fall out of the gap and be sucked away in time, thereby avoiding retention and oxidation.

[0036] Working principle: In a specific embodiment of this utility model, the servo motor 11 first drives one of the bidirectional threaded rods 7 to rotate through the bevel gear set, and then the rotation of the four bidirectional threaded rods 7 is realized through the transmission of the pulley 9 and the transmission belt 10, thereby realizing the movement of the telescopic block 3 on the outer surface of the bidirectional threaded rod 7.

[0037] The two sets of telescopic blocks 3 move synchronously relative to each other at both ends of the bidirectional threaded rod 7, thereby driving the sliding sleeve 4 to slide and adjust on the outer surface of the support tube 5, which can complete the stretching of the corrugated tube 2 to expand it, so that the plastic particles fall out of the gap and are sucked away in time.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A material inlet / outlet expansion mechanism for an injection molding machine, comprising a connecting flange (1) fixedly connected to the material inlet / outlet flange of the injection molding machine, characterized in that: A bellows (2) is fixedly connected to one side surface of the connecting flange (1). A telescopic expansion mechanism is provided on the outer surface of the bellows (2). The telescopic expansion mechanism includes telescopic blocks (3) arranged in a ring array on one side of the bellows (2). When multiple telescopic blocks (3) move horizontally, they drive the bellows (2) to unfold and cause the plastic particles in the gaps on the inner surface of the bellows (2) to fall off.

2. The injection molding machine raw material inlet / outlet expansion mechanism according to claim 1, characterized in that: The telescopic expansion mechanism also includes a sliding sleeve (4) fixedly connected to the outer surface of the free end of the corrugated pipe (2). The corrugated pipe (2), the connecting flange (1) and the sliding sleeve (4) are arranged in two sets opposite to each other, and the connecting flange (1) in one set is fixedly connected to the conveying pipe of plastic particles through another connecting flange.

3. The injection molding machine raw material inlet / outlet expansion mechanism according to claim 2, characterized in that: The telescopic expansion mechanism also includes a support tube (5), the two ends of which are movably inserted into the inner surfaces of the two sliding sleeves (4), and the outer surfaces of both ends of the support tube (5) are fixedly fitted with limit rings (6), the outer surface of the limit rings (6) being slidably connected to the inner surface of the sliding sleeves (4).

4. The injection molding machine raw material inlet / outlet expansion mechanism according to claim 3, characterized in that: The telescopic expansion mechanism also includes bidirectional threaded rods (7) arranged in a ring array on the outer surfaces of the two bellows (2), and multiple telescopic blocks (3) are threaded onto the outer surfaces of the corresponding bidirectional threaded rods (7). The two ends of the bidirectional threaded rods (7) are respectively rotatably connected to the extension ear plates of the two connecting flanges (1).

5. The injection molding machine raw material inlet / outlet expansion mechanism according to claim 4, characterized in that: The telescopic expansion mechanism also includes a support ear plate (8) that is fixedly connected to the outer surface of the middle part of the support tube (5) in a ring array. The outer surface of the middle part of the bidirectional threaded rod (7) is rotatably connected to the surface of the support ear plate (8) through a bearing.

6. The injection molding machine raw material inlet / outlet expansion mechanism according to claim 5, characterized in that: The telescopic expansion mechanism also includes pulleys (9) fixedly sleeved on the outer surfaces of the four bidirectional threaded rods (7), and a transmission belt (10) is connected to the outer surface of the pulleys (9). A servo motor (11) is fixedly connected to the outer surface of one of the connecting flanges (1) through a mounting block. The servo motor (11) drives one of the bidirectional threaded rods (7) to rotate through a bevel gear set.

7. The injection molding machine raw material inlet / outlet expansion mechanism according to claim 6, characterized in that: The corrugated pipe (2) is made of polyurethane, and the sliding sleeve (4) and the support pipe (5) are made of polycarbonate.

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