Raw material filtering device for PET sheet production

Abstract

The utility model discloses a raw material filtering device for PET (Polyethylene Terephthalate) sheet production, which belongs to the technical field of extruders and comprises a rack, a melting cylinder and a rotating rod, one end of the melting cylinder is provided with an extrusion opening, the rotating rod is arranged in the melting cylinder and is driven by a motor to rotate, the motor is fixedly arranged on the rack, and the melting cylinder is fixedly provided with a feeding opening. A first screw sheet close to the extrusion opening and a second screw sheet close to the feeding opening are fixedly arranged on the rotating rod, a material cutting part is fixedly arranged in the melting cylinder, a plurality of inner cutting rods are fixedly arranged on the material cutting part, a plurality of outer cutting rods are fixedly connected to the rotating rod, and the feeding opening communicates with the interior of the melting cylinder through gaps among the outer cutting rods. According to the raw material filtering device for PET sheet production, rice which is not completely cut open is separated before being fused through staggered rotation of the outer cutting rod and the inner cutting rod, so that different rice can be mixed more sufficiently when being fused by a subsequent extruder.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a raw material filtering device for PET sheet production. Background Art

[0002] Before forming, PET sheets usually need to be melt-mixed using a mixer, and the most commonly used one is a screw extruder that integrates extrusion and material mixing functions.

[0003] A screw extruder usually includes a feed hopper that can hold a large amount of raw materials. Producers usually only need to pour the raw materials into the feed hopper in proportion, so that the raw materials in the feed hopper gradually fall into the heating sleeve due to the rotation of the screw rod in the extruder and are heated and melted.

[0004] In actual production, it is found that since some of the material grains of the sheet are not completely cut during cutting, the material grains are relatively large. During melting, it is difficult for such material grains to achieve good mixing by melting with other materials, resulting in defects in the extruded PET sheets due to insufficient mixing of a small part of the materials, causing a decline in product quality. The prior art usually can only reduce the occurrence of such problems by first picking out these incompletely cut grains and then breaking them apart, which is rather cumbersome.

[0005] Therefore, in view of the above problems, a filtering device for the raw materials of a screw extruder is proposed. Content of the Utility Model

[0006] The purpose of the utility model is to solve the problems in the prior art, and a raw material filtering device for PET sheet production is proposed.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: A raw material filtering device for PET sheet production, including a frame, on which a melting cylinder with an extrusion port at one end is fixedly arranged, and a rotating rod driven by a motor to rotate inside the melting cylinder. The motor is fixedly arranged on the frame. The melting cylinder is fixedly provided with a feed port. A first screw blade close to the extrusion port and a second screw blade close to the feed port are fixedly arranged on the rotating rod. A cutting member is fixedly arranged inside the melting cylinder. A number of inner cutting rods distributed around the second screw blade are fixedly arranged on the cutting member. A number of outer cutting rods that rotate around the circumferences of the inner cutting rods are fixedly connected to the rotating rod. The feed port communicates with the inside of the melting cylinder through the gaps between the outer cutting rods.

[0008] The utility model is further arranged as: The axis of the outer cutting rod is twisted around the axis of the rotating rod, and the tangents at both ends of the axis of the outer cutting rod are parallel to the axis of the rotating rod. When the outer cutting rods rotate, they push the materials in contact with them towards the direction of the first screw blade.

[0009] The present utility model is further configured such that one end of the outer cutting rod is fixedly connected to the rotating rod, and the other end of the outer cutting rod is supported by the side surface of the cutting member and is distributed at intervals around the axis of the rotating rod.

[0010] The present utility model is further configured such that adjacent outer cutting rods are distributed at the same interval distance, adjacent inner cutting rods are distributed at the same interval distance, and the interval distance between adjacent outer cutting rods is greater than the interval distance between adjacent inner cutting rods.

[0011] The present utility model is further configured such that the cross-sections of the outer cutting rod and the inner cutting rod are both circular structures, and a plurality of the inner cutting rods rotate along the circumferential side of the second spiral plate.

[0012] The present utility model is further configured such that the outer cutting rod rotates around the axis of the rotating rod along the inner wall of the melting cylinder, and the diameter of the outer cutting rod is equal to 5 mm.

[0013] The present utility model is further configured such that the heating elements provided on the melting cylinder for heating the materials inside it are distributed on the circumferential side of the first spiral plate.

[0014] In summary, the present utility model has the following beneficial effects: The uncompletely cut rice grains are separated before melting by the staggered rotation of the outer cutting rod and the inner cutting rod, so that the subsequent extruder can mix more fully when melting different rice grains. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the rotating rod and the cutting member of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the cutting member of the present utility model;

[0018] Figure 4 is a partial schematic diagram of the rotating rod of the present utility model.

[0019] In the figure: 1, melting cylinder; 2, feeding port; 3, rotating rod; 31, first spiral plate; 32, outer cutting rod; 33, second spiral plate; 4, cutting member; 41, inner cutting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] A raw material filtering device for PET sheet production, as Figures 1 to 4 shown, includes a frame. A melting cylinder 1 with an extrusion port at one end is fixedly arranged on the frame, and a rotating rod 3 driven by a motor to rotate inside the melting cylinder 1. The motor is fixedly arranged on the frame. The melting cylinder 1 is fixedly provided with a feeding port 2. A first screw blade 31 close to the extrusion port and a second screw blade 33 close to the feeding port 2 are fixedly arranged on the rotating rod 3. A cutting member 4 is fixedly arranged inside the melting cylinder 1. A number of inner cutting rods 41 distributed around the second screw blade 33 are fixedly arranged on the cutting member 4. A number of outer cutting rods 32 that rotate around the circumferences of the inner cutting rods 41 are fixedly connected to the rotating rod 3. The inside of the melting cylinder 1 is communicated through the gaps between the outer cutting rods 32. In this specific embodiment, the outer cutting rods 32, the first screw blade 31, and the second screw blade 33 are all fixed to the rotating rod 3 by welding. The heating elements for heating the internal materials of the melting cylinder 1 are distributed on the circumference of the first screw blade 31;

[0022] Usage method: Taking the production of raw materials for extruding PET sheets as an example, first start the motor to make the rotating rod 3 start to rotate. Then pour the proportioned rice into the feeding port 2. The rice within the range of the second screw blade 33 is continuously pushed by the second screw blade 33 towards the first screw blade 31. At the same time, the incompletely cut rice will be continuously lifted by the outer cutting rods 32, and the rice at a high position will fall from a high position through the outer cutting rods 32 and the inner cutting rods 41 due to the action of gravity. During the entire process of the outer cutting rods 32 lifting the rice until it falls, the incompletely cut rice can gradually be torn into several independent rices due to the relative rotation of the outer cutting rods 32 and the inner cutting rods 41.

[0023] Practical effect: Compared with the prior art, by separating the incompletely cut rice before melting, the subsequent extruder can mix different rices more fully during melting.

[0024] As Figures 1 to 4As shown, specifically, one end of the outer cutting rod 32 is fixedly connected to the rotating rod 3, and the other end of the outer cutting rod 32 is supported by the side surface of the cutting member 4 and is distributed at intervals around the axis of the rotating rod 3. In order to enable the outer cutting rod 32 and the inner cutting rod 41 to mainly separate the incompletely cut material rice, the cross-sections of the outer cutting rod 32 and the inner cutting rod 41 are both circular structures. A number of inner cutting rods 41 rotate along the circumferential side of the second spiral piece 33. Further, the outer cutting rod 32 rotates around the axis of the rotating rod 3 along the inner wall of the melting cylinder 1. The diameter of the outer cutting rod 32 is equal to 5 mm;

[0025] Further, in order to push the small amount of material rice to the position of the second spiral piece 33 when the processing reaches the end, the axis of the outer cutting rod 32 is arranged to twist around the axis of the rotating rod 3, and the tangents at both ends of the axis of the outer cutting rod 32 are arranged parallel to the axis of the rotating rod 3. When a number of outer cutting rods 32 rotate, they push the materials they contact towards the direction of the first spiral piece 31;

[0026] In order to enable the incompletely cut material rice to be involved and separated as much as possible by the working actions of the inner cutting rod 41 and the outer cutting rod 32 during the process of being lifted from the bottom of the melting roller by the outer cutting rod 32, the adjacent outer cutting rods 32 are distributed at the same interval, the adjacent inner cutting rods 41 are distributed at the same interval, and the interval between the adjacent outer cutting rods 32 is greater than the interval between the adjacent inner cutting rods 41.

[0027] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0028] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A raw material filtering device for PET sheet production, comprising a frame, a melting cylinder with an extrusion port at one end and a rotating rod driven to rotate by a motor in the melting cylinder are fixedly arranged on the frame, the motor is fixedly arranged on the frame, and the melting cylinder is fixedly arranged with a feed port, characterized in that: A first screw sheet close to the extrusion port and a second screw sheet close to the feed port are fixedly provided on the rotating rod, a cutting piece is fixedly provided in the melting tube, a plurality of inner cutting rods distributed around the second screw sheet are fixedly provided on the cutting piece, a plurality of outer cutting rods that rotate and fit around the circumference of the plurality of inner cutting rods are fixedly connected to the rotating rod, and the feed port is connected to the interior of the melting tube through the gaps between the plurality of outer cutting rods.

2. The raw material filtering device for PET sheet production according to claim 1, characterized in that: The axis of the external rod is twisted around the axis of the rotating rod, and the tangents at both ends of the axis of the external rod are arranged parallel to the axis of the rotating rod. When the external rods rotate, they push the materials they contact to move toward the direction of the first screw blade.

3. The raw material filtering device for PET sheet production according to claim 2, characterized in that: One end of the outer cutting rod is fixedly connected to the rotating rod, and the other end of the outer cutting rod is supported by the side of the cutting piece and is distributed along the axis of the rotating rod.

4. The raw material filtering device for PET sheet production according to claim 2, characterized in that: The adjacent outer rods are spaced at the same distance, the adjacent inner rods are spaced at the same distance, and the distance between adjacent outer rods is greater than the distance between adjacent inner rods.

5. The raw material filtering device for PET sheet production according to claim 2, characterized in that: The cross sections of the outer and inner rods are both circular structures, and a plurality of the inner rods are fitted around the circumference of the second screw sheet and rotate.

6. The raw material filtering device for PET sheet production according to claim 5, characterized in that: The outer cutting rod is in contact with the inner wall of the melting cylinder and rotates around the axis of the rotating rod. The diameter of the outer cutting rod is equal to 5mm.

7. The raw material filtering device for PET sheet production according to claim 1, characterized in that: The heating elements arranged on the melting cylinder for heating the material inside the melting cylinder are distributed on the peripheral side of the first spiral piece.

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