TWI700121B - Fluid mixing mechanism - Google Patents

Abstract

The fluid mixing mechanism provided by the present invention is a communication hole that allows the second fluid to enter the first fluid in the working area, and the shape is a slit hole with a long and narrow shape, so as to achieve a wide range of the second fluid. The fluid is guided into the first fluid to increase the mixing efficiency between the first fluid and the second fluid, and at the same time, it can avoid the generation of the countercurrent state of the first fluid against the direction of the source of the second fluid.

Description

Fluid mixing mechanism

The present invention is related to fluid mixing technology, in particular to a fluid mixing mechanism.

In U.S. Patent No. 6,284,810, it is disclosed that between the blowing agent supply channel and the vertical corresponding extrusion cylinder, a plurality of independent holes are provided to communicate the blowing agent supply channel and the internal space of the extrusion cylinder, and the extrusion is performed through the screw. When the cylinder rotates, each hole is quickly blocked and opened with a screw thread to increase the mixing speed between the foaming agent and the polymer material molten fluid in the extruder.

In order to enable the hole to be completely blocked by the thread of limited thickness, the previous patent application must limit the diameter of the hole within the effective contact thickness range of the thread, so that the hole can be quickly closed and opened, but in this way, That is, it limits the pore size and pore distribution area, and also limits the area and efficiency that can be mixed.

Therefore, the main purpose of the present invention is to provide a fluid mixing mechanism that diverts the second fluid to the first fluid in a wide range in the working area to increase the mixing between the first fluid and the second fluid. Efficiency, while avoiding the generation of the reverse flow state of the first fluid against the direction of the source of the second fluid.

The reason is that, in order to achieve the above-mentioned object, the important technical feature of the fluid mixing mechanism provided by the present invention is to make the communicating hole as the connecting channel for the second fluid to enter the first fluid, and its shape is a slit with a long and narrow shape. hole.

Wherein, in order to further increase the range of the second fluid contacting the first fluid, the shape of the communicating hole can be a straight or cross shape, or a plurality of spokes converging at a single central point to communicate with each other.

Specifically, as a first element for the first fluid to flow, it has a first body and a first flow channel provided inside the first body, and the first flow channel is in the first body. A linearly extending first flow space is formed inside an element as a flow path for the first fluid to flow in the first element.

Wherein, the first flow channel not only uses the entire space of the channel to form the first flow space, but also uses a part of the space to form the first flow space. For this reason, the first element further includes a A screw with a shaft arranged in the first body and located in the first flow passage, and the first flow space is defined between the peripheral side surface of the screw and the inner side wall surface of the first flow passage.

In addition, as a second element for the second fluid to flow, it has a second body and a second flow channel, and the second flow channel is formed inside the second body for the second fluid The second flow space for flowing, so that the second fluid supplied from the outside can flow in the second flow space.

As for the first element and the second element that provide the flow space required for the flow of the first fluid and the second fluid, apart from each other, they can be integrated as disclosed in the aforementioned US Patent No. 6,284,810 In addition to the structure, they can also be independent components separated from each other, and have a fixed relative spatial position after being combined with each other.

Regarding the important technical feature of the communicating hole in this case, the communicating hole is provided on a partition that separates the first flow space from the second flow space, except for It can be combined with the first element and the second element as disclosed in the aforementioned US Patent No. 6284810 In addition to being integrally formed, it can also be separately arranged on the first element or the second element, or combined with the first element and the second element at the same time to achieve the first flow space and the second flow The technical effect of isolating the space. Further, the communication hole is penetrated through the partition to communicate the first flow space and the second flow space.

(10)(10a): Fluid mixing mechanism

(20)(20a): The first element

(21)(21a): The first body

(22): The first volume hole

(23): Taper hole

(24)(24a): First flow channel

(25): The second volume hole

(26a): Mixing screw

(30): Second element

(31): The second body

(32): Second flow channel

(40)(40a): Partition

(401): curved surface

(50)(50a): Connecting hole

(501a): Round hole area

(502a): Strip hole area

(60)(60a): Polymer processing machine

(61)(61a): Raw material melting unit

(62): Mixing unit

Figure 1 is an exploded view of the first preferred embodiment of the present invention.

Figure 2 is a perspective view of the first preferred embodiment of the present invention.

Fig. 3 is a cross-sectional view of the first preferred embodiment of the present invention along the line 3-3 in Fig. 2.

Fig. 4 is a cross-sectional view of the first preferred embodiment of the present invention taken along the line 4-4 in Fig. 2.

Fig. 5 is a perspective view of parts of the first preferred embodiment of the present invention.

FIG. 6 is a schematic diagram of the first preferred embodiment of the present invention applied to a polymer molding processing machine.

Fig. 7 is a partial cross-sectional view of the first preferred embodiment of the present invention taken along the line 7-7 in Fig. 6;

Figure 8 is a partial exploded view of the second preferred embodiment of the present invention.

Figure 9 is a perspective view of the second preferred embodiment of the present invention.

10 is a cross-sectional view of the second preferred embodiment of the present invention taken along the line 10-10 in FIG. 9.

FIG. 11 is a cross-sectional view of the second preferred embodiment of the present invention along the line 11-11 in FIG. 9.

Figure 12 is a perspective view of parts of the second preferred embodiment of the present invention.

FIG. 13 is a schematic diagram of the second preferred embodiment of the present invention applied to a polymer molding processing machine.

Fig. 14 is a partial cross-sectional view of the second preferred embodiment of the present invention along the line 14-14 in Fig. 13.

Fig. 15 is an example of possible changes in the through holes disclosed in the present invention.

First, referring to Figures 1 to 5, the fluid mixing mechanism (10) provided in the first preferred embodiment of the present invention mainly includes a first element (20) and a first element (20) in structure. Two elements (30), a partition (40) and a communication hole (50).

The first element (20) has a cylindrical first body (21), a first containing hole (22) extends from one end of the first body cylinder shaft inward to a proper depth along the cylinder shaft, and a tapered hole (23) extends from the other end of the first body column shaft inward along the column shaft, and is separated from the first containing hole (22), and the straight hole-shaped first flow channel (24) is along the first A body (21) is arranged in the first body (21) with a cylindrical shaft extending, and two ends respectively communicate with the first containing hole (22) and the tapered hole (23), and a second containing hole (25) It extends radially from the first flow channel (24) to the outer cylindrical surface of the first body (21) for accommodating the second element (30), and uses the first flow channel (24) All pore spaces of) form a first flow space.

The second element (30) has a cylindrical second body (31). One end of the cylindrical shaft is inserted into the second receiving hole (25) and fixed to the first body (21). The second flow channel (32) is arranged in the second body (31) to form a second flow space in the second body (31).

The partition (40) is a sheet-like object integrally formed at one end of the column shaft of the second body (31) to isolate the first flow channel (24) and the second flow channel (32), so that the A flow space and the second flow space are not connected to each other, and a partial arc surface (401) on one side of the partition (40) corresponds to the wall surface of the first flow channel (24) to jointly define the first flow channel (24). A flowing space.

The communicating hole (50) is an in-line narrow and long slit hole, which penetrates the partition (40) to communicate the first flow channel (24) and the second flow channel (32), so that The first flow space and the second flow space are communicated with each other through the communication hole (50).

The fluid mixing mechanism (10) is as shown in Figures 6 and 7, which is arranged between the raw material melting unit (61) and the mixing unit (62) corresponding coaxially in a polymer processing machine (60), wherein , The discharging structure of the raw material melting unit (61) is inserted in the first containing hole (22), and the feeding structure of the mixing unit (62) is inserted in the tapered hole (23), by Therefore, the external polymer material passes through the material melting unit (61) After being melted to form a first fluid, it flows in a downstream direction to the mixing unit (62) through the first flow space.

When the first fluid flows in the first flow space in the downstream direction, the second fluid supplied as a blowing agent from the outside, such as supercritical fluid such as inert gas, can be installed in the second element ( 30) is controlled by the conventional valve technology above, and enters the second flow space at an appropriate pressure, and then flows into the first flow space through the communication hole (50), and then flows to the mixing unit (62) ; Wherein, when the second fluid enters the first flow space from the elongated communicating hole (50), through the communicating hole (50) as shown in Figure 4, the long axis of the elongated shape is perpendicular to the downstream flow The first flow channel (24) is in communication with the first flow channel (24) in a large radial direction, so that the second fluid can pass from the first flow channel (24) through the communication hole (50). A flow channel (24) enters within the entire radial range. At the same time, as shown in Figures 3, 4 and 5, the inner diameter of the communicating hole (50) in the direction perpendicular to the long axis of the elongated shape is It is much smaller than the inner diameter in the long axis direction, and its overall hole area is also smaller than the cross-sectional area of the second flow space. In addition, its long and narrow shape is different from the traditional circular hole, which comprehensively improves the flow of the second fluid from the The communication hole (50) enters the kinetic energy of the first flow space, so that the second fluid can be quickly dispersed in the first flow space in a wide range. At this time, if the first flow space is for the second fluid to disperse When the first fluid already exists in the region, the second fluid with high kinetic energy can be quickly and uniformly mixed into the existing first fluid in a wide range.

Please refer to Figures 8 to 12 again. The fluid mixing mechanism (10a) provided in the second preferred embodiment of the present invention uses the shape and range of the communicating hole (50a) to achieve The technical feature that the second fluid can quickly mix with the first fluid is the same as that disclosed in the first preferred embodiment, but the difference is that in this embodiment: the first element (20a) A body (21a) is tubular, and the first flow channel (24a) is formed by the space in the tube, and the first element (20a) further includes a coaxially extending through the first book The mixing screw (26a) in the body (21a), and between the peripheral side of the mixing screw (26a) and the wall surface of the first flow channel (24a), that is, the inner tube wall surface of the first body (21a), define Out of the first flow space.

The communicating hole (50a) penetrating through the partition (40a), in addition to the slit hole shape, has a circular hole area (501a) and a diameter from the circular hole area (501a) in the detailed structure The two hole regions (502a) extending opposite to each other are of equal structure. In addition to achieving the same effect as the first preferred embodiment, the circular hole (50a) can be formed first in the forming process of the communicating hole (50a). After the hole area (501a) is formed, wire cutting is performed on both sides of the hole area (501a) to facilitate the positioning and operation of the processing.

Thereby, the fluid mixing mechanism (10a) provided in this embodiment is applied to the polymer processing machine (60a) as shown in Figure 13 and Figure 14, and is perpendicular to the raw material melting unit (61a) Or other angles. Although the application examples are different, the same effect as the first preferred embodiment can be achieved, and the hole area (501a) and each of the hole areas (502a) can be The difference in shape makes the second fluid get more disturbance when passing through, so as to increase the turbulence to improve the mass transmission and make the processing more convenient.

Except for the above-mentioned different implementations, those skilled in the art to which the present invention belongs can easily change the shape of the communicating hole under the teachings of the present invention, such as (a)(b)( in Figure 15). As shown in c), make the communicating hole into a cross-shaped, double-cross-shaped narrow slit hole shape, or a plurality of spokes converging at a single center point to communicate with each other, or as shown in (d)(e) in Figure 15 (f) The cross, double cross or plural spoke-shaped holes with round hole area and strip hole area, etc., are all the forms that the communicating holes disclosed in the present invention can exist, and they are all within the scope of the present invention. .

(30): Second element

(31): The second body

(40): Partition

(50): Connecting hole

Claims (15)

A fluid mixing mechanism includes: a first element having a first body, and a first flow channel provided in the first body forms a linearly extending first flow space in the first body to A first fluid flows in a downstream direction in the first flow space; a second element has a second body whose relative position to the first body is fixed, and a second flow channel in the shape of a hole Is arranged in the second body and forms a second flow space in the second body for a second fluid to flow in the second flow space; a partition is between the first flow channel and the The second flow channel is arranged on the first element and/or the second element between the first flow channel and the second flow channel, so that the first flow space and the second flow channel are separated The two flow spaces are not connected; a communicating hole in the shape of a long slit is penetrated on the partition element so that the diameter in the long axis direction is larger than the diameter in the non-long axis direction to communicate the first flow channel and the second The flow channel allows the second fluid to enter the first flow space from the second flow space through the communication hole; wherein, the communication hole communicates with the first flow channel in the radial direction, and makes the communication The long axis of the hole is separated from the downstream direction by a non-flat angle. The fluid mixing mechanism according to claim 1, wherein the communication hole is in the shape of a single character, a cross or a double cross, or a plurality of spokes converging at one point to communicate. The fluid mixing mechanism according to claim 1 or 2, wherein the communication hole has a round hole area and a hole area extending radially from the round hole area. The fluid mixing mechanism according to claim 3, wherein the number of strip hole regions of the communication hole is plural. The fluid mixing mechanism according to claim 1, wherein the first system has a tubular shape, and the first flow channel is formed by a space in the tube. The fluid mixing mechanism according to claim 5, wherein the first element forms the first flow space with the entire space of the first flow channel. The fluid mixing mechanism according to claim 5, wherein the first element further includes a screw, and the bobbin is provided in the first body and located in the first flow channel, and is located between the circumferential side of the screw and the first flow channel The first flow space is defined between the walls of a flow channel. The fluid mixing mechanism according to claim 7, wherein the screw system can rotate around its own shaft in the first body. The fluid mixing mechanism according to claim 1, wherein the second system has a tubular shape, and the opening of one end of the second body tube shaft is closed by the partition. The fluid mixing mechanism according to claim 9, wherein the partition is integrally formed on the second body. The fluid mixing mechanism according to claim 9, wherein the partition is in a sheet shape, and a side sheet adjacent to the first channel defines the first flow space together with the first channel. The fluid mixing mechanism according to claim 9, wherein the side surface of the partition adjacent to the first channel is arc-shaped. The fluid mixing mechanism according to claim 1, wherein the first flow system is a molten fluid of polymer raw materials, and the second flow system is a foaming agent. The fluid mixing mechanism according to claim 13, wherein the second flow system is a physical blowing agent. The fluid mixing mechanism according to claim 14, wherein the second fluid system is a supercritical fluid.

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