Feeding mechanism of plastic extruder

Abstract

The utility model discloses a feeding mechanism of a plastic extruder, which comprises a material collecting barrel, the bottom end of the material collecting barrel is fixedly connected with a discharging barrel, the material collecting barrel is of a conical structure, the discharging barrel is of a straight barrel structure, the discharging barrel is communicated with the interior of the material collecting barrel, a stirring shaft is arranged in the material collecting barrel, and one end, extending into and out of the material collecting barrel, of the stirring shaft is fixedly connected with a material pushing screw rod. The outer wall, close to the top, of the material collecting barrel is fixedly connected with a feeding box, and the side wall of the bottom of the feeding box is connected with a mounting box. The problem that the product quality is affected due to poor mixing effect caused by layered feeding is avoided, and a spiral feeding function can be realized through the arranged material pushing spiral rod, so that the problem of blockage can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a feeding structure, in particular to a feeding mechanism of a plastic extruder. Background Art

[0002] A plastic extruder is one of the main devices for plastic product production. Plastic particles are injected into the extruder, pushed forward by a conveying screw inside it, and heated to melt at the same time. Then, the melted plastic is injected into a mold by extrusion force. To ensure smooth production, it is necessary to ensure smooth feeding of plastic particles.

[0003] The current feeding structure is a funnel-like structure. Plastic particles are put into it, and then they will flow down along this structure and finally enter the conveying structure. However, this structure is large at the top and small at the bottom, so it is easy to cause blockage. And sometimes multiple plastics are needed, and there is a sequence in feeding, which easily leads to the problem of uneven mixing, and finally the products produced are unqualified and other problems. For this reason, a feeding mechanism of a plastic extruder is proposed. Summary of the Utility Model

[0004] The technical solution adopted by the utility model to solve the technical problems is: a feeding mechanism of a plastic extruder, including an aggregate cylinder, the bottom end of the aggregate cylinder is fixedly connected with a discharge cylinder, the aggregate cylinder is of a conical structure, the discharge cylinder is of a straight cylinder structure, and the inside of the discharge cylinder and the aggregate cylinder is communicated. A stirring shaft is arranged in the aggregate cylinder, and a pushing screw is fixedly connected to the end of the stirring shaft extending into the discharge cylinder. The outer wall of the aggregate cylinder near the top is fixedly connected with a feeding box, and the bottom side wall of the feeding box is connected with an installation box.

[0005] As a preferred technical solution of the utility model, a cover plate is detachably connected to the top of the aggregate cylinder, and a motor is detachably connected to the middle of the top side wall of the cover plate away from the aggregate cylinder. The output end of the motor passes through the cover plate and is detachably connected to the top end of the stirring shaft.

[0006] As a preferred technical solution of the utility model, support arms are uniformly fixedly connected to both side walls of the stirring shaft. The end of the support arm away from the stirring shaft is of an inclined structure, and the inclination angle is the same as that of the side wall of the aggregate cylinder.

[0007] As a preferred technical solution of the utility model, the bottom end of the stirring shaft extends into the discharge cylinder, the pushing screw is detachably connected to the end of the stirring shaft extending into the discharge cylinder through the top end. The discharge cylinder is of a hollow structure, an inner groove is opened on the side wall of the discharge cylinder, and an electric heating ring is inlaid and connected in the inner groove.

[0008] As a preferred technical solution of the present utility model, the feeding box is of an inclined structure, and the side wall of its inner bottom is uniformly and fixedly connected with flow blocking plates. The top side wall of one end of the feeding box far from the aggregate cylinder is penetrated and provided with a feeding port. Two vibration motors are detachably connected in the installation box, one end of the vibration motor is detachably connected to the bottom side wall of the feeding box, and one end of the installation box is detachably connected to the outer wall of the aggregate cylinder.

[0009] The present utility model has the following advantages: The plastic particles entering the aggregate cylinder can be stirred by the provided support arms, so as to fully mix various different plastic particles, avoiding the problem that the mixing effect is poor due to stratified feeding, which affects the product quality. And the provided pushing screw rod can realize the function of screw feeding, so that the problem of blockage can be avoided, the smoothness of feeding can be ensured, and the function of uniform feeding can be realized, avoiding the influence on the subsequent extrusion and pushing of plastic particles due to the fast and slow feeding speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a three-dimensional structural schematic diagram of a preferred embodiment of the present utility model;

[0011] Figure 2 is a semi-sectional structural schematic diagram of a preferred embodiment of the present utility model;

[0012] Figure 3 is a semi-sectional structural schematic diagram of the discharge cylinder of a preferred embodiment of the present utility model.

[0013] Description of the reference numerals: 1. Aggregate cylinder; 2. Stirring shaft; 3. Motor; 4. Support arm; 5. Feeding box; 6. Installation box; 7. Discharge cylinder; 8. Flow blocking plate; 9. Vibration motor; 10. Pushing screw rod; 11. Inner groove; 12. Electric heating ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The present utility model will be further described below with reference to the drawings.

[0015] Please refer to Figures 1-3 , a feeding mechanism of a plastic extruder of the present utility model, including an aggregate cylinder 1, the bottom end of the aggregate cylinder 1 is fixedly connected with a discharge cylinder 7, the aggregate cylinder 1 is of a conical structure, the discharge cylinder 7 is of a straight cylinder structure, and the inside of the discharge cylinder 7 and the aggregate cylinder 1 is communicated. A stirring shaft 2 is arranged in the aggregate cylinder 1, and one end of the stirring shaft 2 extending into the discharge cylinder 7 is fixedly connected with a pushing screw rod 10. The outer wall of the aggregate cylinder 1 near the top is fixedly connected with a feeding box 5, and the bottom side wall of the feeding box 5 is connected with an installation box 6;

[0016] A cover plate is detachably connected to the top of the aggregate bin 1, and a motor 3 is detachably connected to the middle of the top side wall of the cover plate away from the aggregate bin 1. The output end of the motor 3 passes through the cover plate and is detachably connected to the top end of the stirring shaft 2. Support arms 4 are evenly and fixedly connected to both side walls of the stirring shaft 2. One end of the support arm 4 away from the stirring shaft 2 is of an inclined structure, and the inclination angle is the same as that of the side wall of the aggregate bin 1.

[0017] The technical effect of this solution is as follows: The motor 3 drives the stirring shaft 2 to rotate, thereby driving the support arms 4 to rotate synchronously. Since one end of the support arm 4 is an inclined structure opposite to the inner wall of the aggregate bin 1, it can fit closer to the inner wall of the aggregate bin 1, so that the plastic particles entering the aggregate bin 1 can be stirred, thereby mixing the plastic particles, avoiding the problem of stratification between different plastic particles, resulting in the plastic particles after feeding not being fully mixed, and the quality problem of the finally extruded plastic due to uneven mixing. At the same time, through stirring, the falling speed of the plastic particles can be alleviated, avoiding the problem that the plastic accumulates in the aggregate bin 1 and the falling is slow, affecting the extrusion continuity. The established pushing screw rod 10 can perform spiral pushing on the plastic particles, avoiding the problem of blockage, and can realize the function of uniform feeding, improving the reliability of feeding.

[0018] The bottom end of the stirring shaft 2 extends into the discharge barrel 7. The pushing screw rod 10 is detachably connected to one end of the stirring shaft 2 extending into the discharge barrel 7 through the top end. The discharge barrel 7 is of a hollow structure. An inner groove 11 is formed in the side wall of the discharge barrel 7, and an electric heating ring 12 is embedded in the inner groove 11. The feed box 5 is of an inclined structure, and baffle plates 8 are evenly and fixedly connected to the inner bottom side wall thereof. A feed port is formed through the top side wall at one end of the feed box 5 away from the aggregate bin 1. Two vibration motors 9 are detachably connected in the installation box 6. One end of the vibration motor 9 is detachably connected to the bottom side wall of the feed box 5. One end of the installation box 6 is detachably connected to the outer wall of the aggregate bin 1.

[0019] The technical effect of this solution is as follows: The established feed box 5 and baffle plates 8 can buffer the plastic particles entering the aggregate bin 1, avoiding the plastic particles pouring into the aggregate bin 1 all at once and causing blockage at the connection between the feed box 5 and the aggregate bin 1. The vibration motors 9 and baffle plates 8 can block the plastic particles, and at the same time ensure that the plastic particles move forward smoothly under vibration, avoiding the problem of blockage. The established electric heating ring 12 can preheat the plastic particles moving in the discharge barrel 7, improving the melting efficiency in the extruder.

[0020] Specifically, when the utility model is in use, the required plastic pellets are put into the feed hopper 5. The plastic pellets can smoothly enter the aggregate cylinder 1 along the slope of the feed hopper 5 and with the assistance of the vibration of the vibration motor 9. The motor 3 is started in advance to drive the stirring shaft 2 and the support arm 4 to rotate synchronously to stir and mix the plastic pellets entering the aggregate cylinder 1. The plastic pellets naturally descend during the stirring process and finally enter the discharge cylinder 7. Since the discharge cylinder 7 is connected to the stirring shaft 2, the rotation of the stirring shaft 2 will drive the pushing screw rod 10 to rotate synchronously, so as to perform spiral pushing on the plastic pellets entering the discharge cylinder 7, ensuring the function of uniform feeding and also avoiding the problem of blockage.

[0021] Due to the electric heating ring 12 provided, the plastic pellets entering the discharge cylinder 7 are heated under the action of the electric heating ring 12 to achieve the preheating function. Because of the pushing function of the pushing screw rod 10, the residence time of the plastic pellets in the aggregate cylinder 1 is increased. At the same time, because of the rotation of the pushing screw rod 10, the plastic pellets will rotate along the spiral of the pushing screw rod 10, ensuring that the plastic pellets are heated more evenly and improving the efficiency of subsequent hot melt extrusion.

[0022] The above is only the preferred embodiment of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

[0023] The other parts not detailed in the utility model belong to the prior art, so they will not be elaborated here.

[0024] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A feeding mechanism for a plastic extruder, including an aggregate cylinder (1), characterized in that, The bottom end of the aggregate cylinder (1) is fixedly connected to a discharge cylinder (7). The aggregate cylinder (1) is of a conical structure, and the discharge cylinder (7) is of a straight cylinder structure. The discharge cylinder (7) and the aggregate cylinder (1) are internally connected. A stirring shaft (2) is provided in the aggregate cylinder (1). One end of the stirring shaft (2) extending into the discharge cylinder (7) is fixedly connected to a pushing screw rod (10). The outer wall of the aggregate cylinder (1) near the top is fixedly connected to a feed box (5), and the bottom side wall of the feed box (5) is connected to an installation box (6).

2. The feeding mechanism of a plastic extruder according to claim 1, characterized in that, The top of the aggregate cylinder (1) is detachably connected to a cover plate, and a motor (3) is detachably connected to the middle of the top side wall of the cover plate away from the aggregate cylinder (1). The output end of the motor (3) passes through the cover plate and is detachably connected to the top end of the stirring shaft (2).

3. The feeding mechanism of a plastic extruder according to claim 1, characterized in that, Both side walls of the stirring shaft (stirring shaft) (2) are uniformly fixedly connected with support arms (4). One end of the support arm (4) away from the stirring shaft (2) is of an inclined structure, and the inclination angle is the same as that of the side wall of the aggregate cylinder (1).

4. The feeding mechanism of a plastic extruder as described in claim 1, characterized in that, The bottom end of the stirring shaft (2) extends into the discharge cylinder (7). The pushing screw rod (10) is detachably connected to one end of the stirring shaft (2) extending into the discharge cylinder (7) through the top end. The discharge cylinder (7) is of a hollow structure. An inner groove (11) is formed in the side wall of the discharge cylinder (7), and an electric heating ring (12) is embedded in the inner groove (11).

5. The feeding mechanism of a plastic extruder according to claim 1, characterized in that, The feed box (5) is of an inclined structure, and a flow blocking plate (8) is uniformly fixedly connected to its inner bottom side wall. A feed port is formed through the top side wall at one end of the feed box (5) away from the aggregate cylinder (1). Two vibration motors (9) are detachably connected in the installation box (6). One end of the vibration motor (9) is detachably connected to the bottom side wall of the feed box (5). One end of the installation box (6) is detachably connected to the outer wall of the aggregate cylinder (1).

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