Raw material feeding assembly for plastic meal box injection molding

Abstract

The raw material feeding assembly comprises an injection molding machine, a feeding pipe is fixed to the upper end of the injection molding machine, a hopper is fixed to the upper end of the feeding pipe, and a discharging pipe inclining towards the lower right portion is fixed to the right side of the feeding pipe. A valve plate capable of being controlled in a rotating mode is vertically installed on the portion, close to the right side wall, of the inner side of the feeding pipe, and the valve plate rotates rightwards to block a feeding end opening of the discharging pipe. Plastic particles in the hopper enter the feeding pipe by opening the plugging plate and are directly fed into the injection molding machine, a spiral feeding rod does not need to be additionally used for feeding and feeding, when the hopper is emptied, the plugging plate is used for plugging, and then the valve plate is controlled to rotate leftwards so as to open the discharging pipe, so that the plastic particles are discharged. And the upper end of the valve plate abuts against the left side wall in the feeding pipe to block the feeding pipe and guide materials to the discharging pipe at the same time, so that the structure related to feeding of plastic particles in the hopper and emptying and discharging is more simplified, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a raw material feeding assembly for injection molding of plastic lunch boxes. Background Technique

[0002] When producing plastic lunch boxes, plastic particles are fed into an injection molding machine through a hopper for melting, and the molten plastic is extruded into the cavity of a mold. After the plastic in the mold cavity cools and solidifies, a plastic lunch box is formed. After producing and injecting a product of a certain specification and replacing the injection mold, it is necessary to remove the remaining raw materials in the feeding hopper.

[0003] Chinese Patent with publication number CN209971332U discloses a feeding device for a plastic bottle injection molding machine, which includes an injection molding machine body, a feeding barrel fixedly connected to the injection molding machine body, and support legs fixedly installed at the bottom ends of the injection molding machine body and the feeding barrel. The top of the feeding barrel is open, and the bottom is fixedly connected with a discharge funnel. The inner cavity of the feeding barrel is provided with symmetrically arranged left and right rotating grooves. A second baffle and a first baffle are respectively rotatably installed in the inner cavities of the two rotating grooves. Electric hydraulic cylinders for the first baffle and the second baffle to rotate are fixedly installed on the side walls of the feeding barrel and the injection molding machine body. A sleeve for upward feeding is fixedly connected through the side close to the injection molding machine body between the feeding barrel and the injection molding machine body. A communicating pipe is connected through between the left bottom end of the sleeve and the injection molding machine body. The utility model is convenient for taking out the remaining raw materials, avoids incomplete manual taking out, improves the production and injection molding efficiency, and avoids waste of raw materials.

[0004] When the above feeding device of the plastic bottle injection molding machine feeds materials, the plastic particles in the feeding barrel are sent to the injection molding machine through a spiral feeding rod. When replacing the plastic particles and emptying the feeding barrel, the second baffle and the first baffle rotate relative to each other to open, so as to discharge the plastic particles in the feeding barrel downward. When feeding the injection molding machine, it still needs to cooperate with the spiral feeding rod for feeding. At the same time, it is also necessary for the electric hydraulic cylinder to drive the moving plate and use the teeth on both sides to drive the first gear and the third gear to rotate, thereby driving the second gear and the fourth gear to rotate, and further driving the first baffle and the second baffle to rotate. There are many structures involved in the feeding and emptying of plastic particles, which has a certain degree of complexity. Summary of the Utility Model

[0005] In order to solve the problem that the above feeding device of the plastic bottle injection molding machine has many structures involved in the feeding and emptying of plastic particles and has a certain degree of complexity, the present application provides a raw material feeding assembly for injection molding of plastic lunch boxes, and adopts the following technical solutions:

[0006] A raw material feeding assembly for injection molding of a plastic lunch box, comprising an injection molding machine. An inlet pipe is fixed to the upper end of the injection molding machine, and a hopper is fixed to the upper end of the inlet pipe. A discharge pipe inclined downward to the right is fixed to the right side of the inlet pipe. A valve plate that can be rotationally controlled is vertically installed near the right side wall inside the inlet pipe. When the valve plate rotates to the right, it seals the feeding port of the discharge pipe. When the valve plate rotates to the left, it can be pressed against the left side wall inside the inlet pipe. A plugging plate is inserted at a position near the upper port on the left side wall of the inlet pipe, and a driving mechanism for driving the plugging plate to move left and right is installed on the left side wall of the inlet pipe.

[0007] Optionally, the lower edge of the valve plate is rotatably installed on the inlet pipe through a rotating shaft. The front end of the rotating shaft passes through the front side wall of the inlet pipe and is fixed with a connecting column. A rotating plate is fixed to the left side of the connecting column, and a locking member that elastically presses against the inlet pipe is installed at the left end of the rotating plate. Two locking holes cooperating with the locking member are opened on the front side surface of the inlet pipe.

[0008] Optionally, the locking member includes a locking column passing through the rotating plate. A retaining ring is fixed to one end of the locking column close to the rotating plate, and a spring sleeved on the locking column is arranged between the retaining ring and the rotating plate. A pinch handle is fixed to the other end of the locking column.

[0009] Optionally, a regulating plate bent downward is fixed to the left end of the plugging plate, and a threaded hole is opened at the center of the regulating plate.

[0010] Optionally, the driving mechanism includes a motor fixed to the left side wall of the inlet pipe, and a lead screw passing through the threaded hole is fixed to the left end of the output shaft of the motor.

[0011] Optionally, a corrugated pipe is fixed to the discharge end of the discharge pipe, and a steering pipe is fixed to one end of the corrugated pipe.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] In the present utility model, the plastic particles in the hopper enter the inlet pipe by opening the plugging plate and are directly sent into the injection molding machine without using a spiral feeding rod for feeding. When emptying the hopper, the plugging plate is used for plugging, and then the valve plate is controlled to rotate to the left to open the discharge pipe. The upper end of the valve plate is pressed against the left side wall inside the inlet pipe to seal the inlet pipe and at the same time guide the discharge pipe, so that the structures involved in feeding the plastic particles in the hopper and emptying the discharge are made simpler and lower in cost. Description of the Drawings

[0014] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0015] Figure 1 is a cross-sectional view of a raw material feeding assembly for injection molding of a plastic lunch box of the present utility model;

[0016] Figure 2 is a schematic external structure diagram of a feed pipe of a raw material feeding assembly for injection molding of a plastic lunch box shown in the present utility model;

[0017] Figure 3 is a schematic diagram of a locking member of a raw material feeding assembly for injection molding of a plastic lunch box shown in the present utility model;

[0018] Figure 4 is a schematic diagram of a plugging plate of a raw material feeding assembly for injection molding of a plastic lunch box shown in the present utility model.

[0019] In the figure: 1, injection molding machine; 2, feed pipe; 21, locking hole; 3, driving mechanism; 31, lead screw; 32, motor; 4, hopper; 5, plugging plate; 51, adjusting plate; 6, valve plate; 61, locking member; 611, locking column; 612, retaining ring; 613, spring; 614, pinch handle; 62, rotating plate; 63, connecting column; 7, discharge pipe; 71, corrugated pipe; 72, steering pipe. Specific embodiments

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0021] Specifically, please refer to Figure 1As shown in the figure, a raw material feeding assembly for injection molding of plastic lunch boxes includes an injection molding machine 1. A feeding pipe 2 is fixed to the upper end of the injection molding machine 1, and a hopper 4 is fixed to the upper end of the feeding pipe 2. A discharging pipe 7 that slopes downward to the right is fixed to the right side of the feeding pipe 2. And a valve plate 6 that can be rotationally controlled is vertically installed near the right side wall inside the feeding pipe 2. When the valve plate 6 rotates to the right, it seals the feeding port of the discharging pipe 7. And when the valve plate 6 rotates to the left, it can be pressed against the left side wall inside the feeding pipe 2. A plugging plate 5 is inserted at the position near the upper port on the left side wall of the feeding pipe 2, and a driving mechanism 3 for driving the plugging plate 5 to move left and right is installed on the left side wall of the feeding pipe 2. The plastic particles in the hopper 4 enter the feeding pipe 2 through the opening of the plugging plate 5 and are directly sent into the injection molding machine 1, without the need to use a screw feeding rod for feeding. And when emptying the hopper 4, the plugging plate 5 is plugged, then the control valve plate 6 rotates to the left to open the discharging pipe 7, and the upper end of the valve plate 6 is pressed against the left side wall inside the feeding pipe 2 to seal the feeding pipe 2, while guiding the discharging pipe 7. Thus, the structures involved in the feeding of plastic particles in the hopper 4 and the emptying of discharging are made more simplified and lower in cost.

[0022] For details, please refer to Figure 1 and Figure 2 As shown in the figure, the lower edge of the valve plate 6 is rotatably installed on the feeding pipe 2 through a rotating shaft, and the front end of the rotating shaft passes through the front side wall of the feeding pipe 2 and is fixed with a connecting column 63. A rotating plate 62 is fixed to the left side of the connecting column 63. By rotating the rotating plate 62, the valve plate 6 is driven to rotate to open and seal the discharging pipe 7. When the valve plate 6 opens the discharging pipe 7, it seals the feeding of the feeding pipe 2 at the same time. And a locking member 61 that elastically abuts against the feeding pipe 2 is installed at the left end of the rotating plate 62. Two locking holes 21 that cooperate with the locking member 61 are opened on the front side surface of the feeding pipe 2, and the two locking holes 21 respectively cooperate with the locking member 61 in two upper and lower positions for locking.

[0023] For details, please refer to Figure 3 As shown in the figure, the locking member 61 includes a locking column 611 that penetrates the rotating plate 62. A retaining ring 612 is fixed to the end of the locking column 611 near the rotating plate 62. And a spring 613 sleeved on the locking column 611 is arranged between the retaining ring 612 and the rotating plate 62. The spring 613 elastically pushes the retaining ring 612 so that the locking column 611 is elastically inserted into the locking hole 21 for locking. A pinch handle 614 is fixed to the other end of the locking column 611. By pulling the locking column 611 away from the locking hole 21 through the pinch handle 614, the rotation adjustment of the rotating plate 62 can be carried out.

[0024] For details, please refer to Figure 4As shown, a downwardly bent adjusting plate 51 is fixed to the left end of the plugging plate 5, and a threaded hole is provided at the center of the adjusting plate 51. Driven by the lead screw 31, the adjusting plate 51 drives the plugging plate 5 to move leftward, thereby opening the upper port of the feed pipe 2, and then the hopper 4 can discharge materials.

[0025] For details, please refer to Figure 4 As shown, the driving mechanism 3 includes a motor 32 fixed to the left side wall of the feed pipe 2, and a lead screw 31 passing through the threaded hole is fixed to the left end of the output shaft of the motor 32. The motor 32 drives the lead screw 31 to rotate, thereby driving the adjusting plate 51 to drive the plugging plate 5 to move left and right.

[0026] For details, please refer to Figure 2 As shown, a bellows 71 is fixed to the discharge end of the discharge pipe 7, and a turning pipe 72 is fixed to one end of the bellows 71. The bellows 71 and the turning pipe 72 can adjust the discharge direction when emptying the hopper 4.

[0027] Working principle: During injection molding, plastic particles are poured into the hopper 4. At this time, the motor 32 drives the lead screw 31 to rotate, thereby driving the adjusting plate 51 to drive the plugging plate 5 to move leftward, so that the plastic particles enter the feed pipe 2 and are sent into the injection molding machine 1. After producing and injecting a product of one specification and replacing the injection mold, when the remaining raw materials in the hopper 4 need to be taken out, first close the plugging plate 5, and then drive the valve plate 6 to rotate leftward and abut against the left side wall inside the feed pipe 2 by rotating the rotating plate 62 downward. At this time, the discharge pipe 7 is opened, and then the plugging plate is opened again to empty the hopper 4.

[0028] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A raw material feeding assembly for injection molding of a plastic lunch box, comprising an injection molding machine (1), a feeding pipe (2) being fixed at the upper end of the injection molding machine (1), and a hopper (4) being fixed at the upper end of the feeding pipe (2), characterized in that: A discharge pipe (7) tilted toward the lower right is fixed on the right side of the feed pipe (2), and a valve plate (6) capable of rotation control is vertically installed on the inner side of the feed pipe (2) near the right side wall. The valve plate (6) is rotated to the right to block the feed port of the discharge pipe (7), and the valve plate (6) is rotated to the left to be pressed against the left side wall inside the feed pipe (2). A blocking plate (5) is inserted into the left side wall of the feed pipe (2) near the upper port, and a driving mechanism (3) for driving the blocking plate (5) to move left and right is installed on the left side wall of the feed pipe (2).

2. A raw material feeding assembly for injection molding of a plastic lunch box according to claim 1, characterized in that: The lower edge of the valve plate (6) is rotatably mounted on the feed pipe (2) via a rotating shaft, and the front end of the rotating shaft passes through the front side wall of the feed pipe (2) and is fixed with a connecting column (63), a rotating plate (62) is fixed to the left side of the connecting column (63), and a locking member (61) elastically pressed against the feed pipe (2) is installed at the left end of the rotating plate (62), and two locking holes (21) cooperating with the locking member (61) are provided on the front side of the feed pipe (2).

3. A raw material feeding assembly for injection molding of a plastic lunch box according to claim 2, characterized in that: The locking member (61) comprises a locking column (611) penetrating the rotating plate (62); a retaining ring (612) is fixed to one end of the locking column (611) close to the rotating plate (62); a spring (613) sleeved on the locking column (611) is arranged between the retaining ring (612) and the rotating plate (62); and a gripping handle (614) is fixed to the other end of the locking column (611).

4. A raw material feeding assembly for injection molding of a plastic lunch box according to claim 1, characterized in that: A downwardly bent adjustment plate (51) is fixed to the left end of the blocking plate (5), and a threaded hole is provided at the center of the adjustment plate (51).

5. A raw material feeding assembly for injection molding of a plastic lunch box according to claim 1, characterized in that: The driving mechanism (3) comprises a motor (32) fixed to the left side wall of the feed pipe (2), and a screw rod (31) passing through a threaded hole is fixed to the left end of the output shaft of the motor (32).

6. A raw material feeding assembly for injection molding of a plastic lunch box according to claim 1, characterized in that: A corrugated tube (71) is fixed to the discharge end of the discharge tube (7), and a steering tube (72) is fixed to one end of the corrugated tube (71).

Images