Efficient mixing exhaust screw

Abstract

The utility model provides an efficient mixing exhaust screw which solves the problem that an existing exhaust screw is common in mixing effect. The device is characterized in that the first-order screw is sequentially provided with a first-order conveying section, a first-order compression section, a first-order metering section and a first-order mixing section; the second-order screw rod is sequentially provided with an exhaust section, a second-order compression section, a second-order metering section and a second-order mixing section; the second-order mixing section is provided with an annular ring, and spiral runners are uniformly distributed on the annular ring. After the melt is mixed by the first-order mixing section, the melt is mixed again through the spiral runner, so that the raw materials and the additives are uniformly mixed, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a high-efficiency mixing and exhausting screw. Background Art

[0002] The injection molding machine is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. The injection molding machine can heat plastics and apply high pressure to the molten plastics to make it ejected and fill the mold cavity. During the operation of the injection molding machine, the raw materials and additives are added to the barrel in proportion, and the mixed materials are turned into molten polymers through the rotation of the screw in the barrel and the heating of the barrel. Then, the mixed materials are driven forward by the rotation of the screw and continuously extruded from the head at a certain pressure and speed to become the required plastic parts. The existing exhaust screws, such as the double-stage screw exhaust screw disclosed in the Chinese patent authorization announcement number CN208410643U, include a first-stage screw and a second-stage screw, and a mixing section is provided between the first-stage screw and the second-stage screw. The mixing effect of this structure is general, and there is a certain degree of uneven mixing of the molten raw materials and additives, which leads to a decrease in the quality of the injection molded products. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides a high-efficiency mixing and exhausting screw, which solves the problem that the mixing effect of the current exhausting screw is mediocre.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A high-efficiency mixing and exhaust screw, comprising a rod body, wherein the rod body is provided with a first-stage screw and a second-stage screw in sequence along a feeding direction, comprising:

[0006] The first-stage screw is provided with a first-stage conveying section, a first-stage compression section, a first-stage metering section and a first-stage mixing section in sequence;

[0007] The second-stage screw is provided with an exhaust section, a second-stage compression section, a second-stage metering section and a second-stage mixing section in sequence;

[0008] The second-stage mixing section is provided with an annular ring, and the annular ring is evenly distributed with spiral flow channels.

[0009] There are at least two annular rings, and a spacing is provided between the annular rings adjacent to each other.

[0010] The spiral directions of the front and rear adjacent spiral flow channels are opposite.

[0011] A reinforcement portion is provided between the screw ridges of the first-stage mixing section and the exhaust section.

[0012] A screw head is provided at the extrusion end of the rod body, a check ring is installed on the screw head, and a limiting column for detachably cooperating with the screw head is provided at the front end of the screw head.

[0013] The rod body and the screw head are integrally formed.

[0014] The spiral ridges of the exhaust section are double spiral ridges, and the spiral groove depth of the exhaust section is greater than the spiral groove depths of other sections.

[0015] The beneficial effects of the utility model are:

[0016] After the melt is mixed in the first-stage mixing section, it is mixed again through the spiral flow channel to mix the raw materials and additives evenly and improve the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the utility model.

[0018] Figure 2 This utility model Figure 1 A magnified schematic diagram of center A.

[0019] Figure 3 This utility model Figure 1 A magnified schematic diagram of point B in the middle.

[0020] Figure 4 This utility model Figure 1 Enlarged schematic diagram of point C in the middle.

[0021] First-stage screw 1, first-stage conveying section 11, first-stage compression section 12, first-stage metering section 13, first-stage mixing section 14, second-stage screw 2, exhaust section 21, second-stage compression section 22, second-stage metering section 23, second-stage mixing section 24, annular ring 3, spiral flow channel 4, spacing 5, reinforcement part 6, screw head 7, check ring 8, and limit column 9. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0023] In the embodiment, Figure 1 , Figure 2 , Figure 3 As shown, a high-efficiency mixing and exhaust screw comprises a rod body, wherein the rod body is provided with a first-stage screw 1 and a second-stage screw 2 in sequence along a feeding direction, and further comprises:

[0024] The first-stage screw 1 is provided with a first-stage conveying section 11, a first-stage compression section 12, a first-stage metering section 13 and a first-stage mixing section 14 in sequence;

[0025] The second-stage screw 2 is provided with an exhaust section 21, a second-stage compression section 22, a second-stage metering section 23 and a second-stage mixing section 24 in sequence;

[0026] The second-stage mixing section 24 is provided with an annular ring 3 , and the annular ring 3 is evenly distributed with spiral flow channels 4 .

[0027] After the melt is mixed in the first-stage mixing section 14, the melt is mixed again through the spiral flow channel 4 to mix the raw materials and additives evenly, thereby improving the quality of the product.

[0028] In the embodiment, Figure 1 , Figure 3 As shown, there are at least two annular rings 3, and the annular rings 3 adjacent to each other are provided with a spacing 5. The molten material is divided and then converged and then divided again, which achieves a better mixing effect.

[0029] In the embodiment, Figure 1 , Figure 3 As shown, the spiral directions of the adjacent spiral flow channels 4 are opposite. Different spiral directions enhance the mixing effect of the raw materials and additives.

[0030] In the embodiment, Figure 1 , Figure 2 As shown, a reinforcement portion 6 is provided between the screw ridges of the first-stage mixing section 14 and the exhaust section 21 to ensure the strength between the first-stage mixing section 14 and the exhaust section 21 and prevent the first-stage mixing section 14 and the exhaust section 21 from breaking during operation.

[0031] In the embodiment, Figure 1 , Figure 4 As shown, the extrusion end of the rod body is provided with a screw head 7, a check ring 8 is installed on the screw head 7, and a limit column 9 for detachably cooperating with the screw head 7 is provided at the front end of the screw head 7. The limit column 9 and the screw head 7 are hole-shaft matched, which facilitates the disassembly and assembly of the check ring 8.

[0032] In the embodiment, Figure 1 , Figure 4 As shown, the rod body and the screw head 7 are integrally formed. Compared with the threaded matching of the rod body and the screw head 7, the advantage is that the molten material will not enter the gap where the rod body and the screw head 7 are connected, causing the molten material to stay in the gap for a long time, affecting the quality of the product.

[0033] In the embodiment, Figure 1 As shown, the spiral ridges of the exhaust section 21 are double spiral ridges, and the spiral groove depth of the exhaust section 21 is greater than the spiral groove depths of other sections, which has a good exhaust effect and obtains a molten material with lower moisture and higher quality.

[0034] Obviously, the above embodiments of the present invention are merely examples for illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to provide all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A high-efficiency mixing and exhausting screw, comprising a rod body, wherein the rod body is provided with a first-stage screw (1) and a second-stage screw (2) in sequence along a feeding direction, characterized in that: Also includes: The first-stage screw (1) is provided with a first-stage conveying section (11), a first-stage compression section (12), a first-stage metering section (13) and a first-stage mixing section (14) in sequence; The second-stage screw (2) is provided with an exhaust section (21), a second-stage compression section (22), a second-stage metering section (23) and a second-stage mixing section (24) in sequence; The second-stage mixing section (24) is provided with an annular ring (3), and the annular ring (3) is evenly distributed with spiral flow channels (4).

2. A high-efficiency mixing and exhaust screw according to claim 1, characterized in that: There are at least two annular rings (3), and a spacing (5) is provided between the annular rings (3) adjacent to each other.

3. A high-efficiency mixing and exhaust screw according to claim 1, characterized in that: The spiral directions of the front and rear adjacent spiral flow channels (4) are opposite.

4. A high-efficiency mixing and exhaust screw as claimed in claim 1, characterized in that: A reinforcement portion (6) is provided between the screw ridges of the first-stage mixing section (14) and the exhaust section (21).

5. A high-efficiency mixing and exhaust screw as claimed in claim 1, characterized in that: The extrusion end of the rod body is provided with a screw head (7), a check ring (8) is mounted on the screw head (7), and a limiting column (9) for detachably cooperating with the screw head (7) is provided at the front end of the screw head (7).

6. A high-efficiency mixing and exhaust screw as claimed in claim 5, characterized in that: The rod body and the screw head (7) are integrally formed.

7. A high-efficiency mixing and exhaust screw according to claim 1, characterized in that: The spiral ridges of the exhaust section (21) are double spiral ridges, and the spiral groove depth of the exhaust section (21) is greater than the spiral groove depths of other sections.

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