JPS60183108A - Nozzle device generating turbulence of liquid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to flow-directing nozzles that produce turbulent flows of viscous liquids, particularly liquids filled with particles or fibers. The present invention also relates to an impingement liquid mixing device, particularly a mixing head for a reaction injection molding device, which includes the nozzle and a mixing chamber insert having a flat interface in sealing contact therewith.

Reaction injection molding, known as RIM, has become an important and widely used method for manufacturing plastic products. This method applies to plastic components of automobiles (
It is used to a large extent in the automobile industry, for example in the manufacture of bumpers and fenders. Polyurethane and nylon plastic moldings are most prominently produced by the 81M process. Many such moldings include particle-filled fibers or short fibers (eg, glass fibers) as reinforcements to reduce the cost of the molding and/or to improve its properties.

In the It I JW method, when two or more types of reactive C tension bodies are closely mixed together and placed in a mold, the mixture reacts and forms a product having the shape of the void in the mold. form a shaped article. If the reactive liquid is viscous, this liquid is generally heated to reduce its viscosity and facilitate pumping of the bulk. do. Mixing of the liquid components of the It I M formulation is accomplished by a continuous impingement technique in which separate θIL streams of the liquid components are directed to collide or collide with each other at high velocity within a mixing chamber and the resulting mixture is removed from the mixing chamber. Flow continuously into the mold.

Generally, the force of new liquids entering the mixing chamber and mixing with each other forces the already mixed liquids out of the mixing chamber and into the mold. At the end of the mixing cycle, the mixed reactive liquid remaining in the mixing chamber is forced out of the chamber by a plunger moving down the chamber.

At least one of the reactive liquids (i.e., elements) very often contains fillers for the purpose of reducing the cost of the molding or improving its properties, or both.

The filler is generally an inorganic particulate material (eg, clay, silica, diatomaceous earth, earth, etc.), a solid pigment, or a fibrous material (eg, glass fiber). Glass KM, f
, when using an IL, the glass fibers are generally short fibers (eg, % inch or less). However, 1
The use of a filler-containing liquid in the 1'I M method reduces the equipment used to carry out the method (i.e., 111
' M equipment causes problems with ICs and problems with mixing and molding.
This occurs due to the settling or separation of the filler from the liquid during recirculation of the liquid containing the filler A in the 11M device. This separation problem occurs when the element is glass fiber and it loosens (decomposes into very fine filaments) and blocks the flow of the liquid.The separation problem of the filler impedes the flow of the fluid. In addition to disturbing the proportion of reactive plate material entering the mixing chamber of the mix head [7, thereby resulting in defective parts, thus overcoming this fill separation problem] It is highly desirable to prevent the material from separating from the liquid.

SUMMARY OF THE INVENTION One object of the invention is to provide an improved mixhead apparatus for mixing at least two liquids.

Another object of the invention is to mix two or more types of 1W bodies in which at least one liquid contains a filler material in the passageway by creating turbulence in the liquid supply passageway. Prevention 11: Reduces the separation of from the liquid.
It is an object of the present invention to overcome the drawbacks of prior art mixhead devices for mixing two or more types of liquids by providing a mixhead device that mixes two or more types of liquids.

Yet another object of the invention is to provide a mixhead apparatus for mixing two or more liquids having turbulence generating nozzle elements.

The present invention comprises an elongated hollow cylindrical body having walls defining a cavity and a longitudinal axis;
7 L 8 L] spaced apart, at least one of which is coaxial with the longitudinal axis of the main body, and an opening provided within the cavity to form a curved liquid flow path between the two openings. The present invention provides a liquid turbulence generating nozzle device equipped with a fixed body flow finger rotation part. Still further, the present invention provides a mixing device having a central cylindrical chamber open at both ends formed by a housing, a nozzle arrangement as described above, and a wall having a plurality of orifices communicating with the chamber. /Sir 1, a plunger that acts reciprocally in the chamber in the length direction to open and close the orifice, and a means for causing the plunger to act reciprocally in the chamber, and mixes at least two liquids by collision. The present invention provides a head device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a novel nozzle device and a novel nozzle device particularly suitable for directing the flow of liquids, particularly liquids filled with filler material, of two or more types of liquids, especially one of them. An improved mixhead apparatus is provided for impingingly mixing two or more types of liquids, the seed being filled with filler material, for forming plastic articles. The nozzle device of the present invention has one of its faces (C) as follows: a.) an elongated hollow cylindrical body having a longitudinal axis and a wall forming a cavity along said axis; a body; b) three spaced apertures provided in the body in communication with the cavity for fluid access to and from the body, at least one of which is coaxial with the longitudinal axis; and C) It can be fixed in the shelter and taken out in the direction of the longitudinal axis (l).
In another aspect of the nozzle device of the present invention, the flow finger member forming an 800-curved liquid flow path, the body has a flat surface with a groove for receiving an O-ring.

The invention also includes a plurality of liquids, particularly at least two of which are reactive '/g, and more particularly a plurality of liquids of which at least two are reactive and at least one of which is reactive. provides an improved mixhead apparatus for impingementally mixing a plurality of liquids containing a fourth filler, the apparatus comprising: (a) a retaining housing; bl a mixhead insert having walls forming a central, generally cylindrical chamber open at both ends and an orifice in the wall communicating with the chamber; a cylindrical plunger that acts reciprocally to open and close the orifice and remove residual liquid from the chamber;
and means for supplying a liquid through an orifice into a mixing chamber, wherein the liquid supply means actually constitute a nozzle, and the nozzle comprises (a) an elongated hollow cylindrical body having a longitudinal axis and a wall defining a cavity along the axis; and a body provided in the body in communication with the cavity and adapted to allow liquid to enter and exit the cavity; three spaced openings, at least one of which is not coaxial with the longitudinal axis; and a flow directing member extending into the cavity and forming a 180° liquid flow path between two of the openings.

In another aspect of the mixhead apparatus of the present invention, the mixhead insert surrounds and sealingly engages the 1" hole so that the flow from the nozzle through the orifice of the mixing chamber into the mixing chamber of the 1" insert. It has a flat narrow surface that allows for

The present invention will now be described with reference to the drawings. Referring to FIGS. 1 and 2, the flow of a liquid, particularly a liquid containing a filler material such as glass fibers, may be caused to generate turbulence in the flow of the liquid through the nozzle, thereby causing the nozzle arrangement 10 to experience stagnation of the liquid flow. A nozzle device #, 10 is shown that directs the nozzle to reduce or prevent stagnation of liquid flow within the nozzle (i.e., to reduce or prevent little or no flow of liquid within the nozzle). This reduces or prevents the filler from settling or separating from the liquid containing the light filler flowing through the nozzle. The elongated body 21 of the nozzle 10 is in the longitudinal direction @ line, this 1111
1 Open space 22 and opening 23.2 extending along both sides
4.25, open 1-]252! ll - terminating in a short frustoconical end containing. Opening 23.
25 is coaxial with the longitudinal axis of the main body 21 and is formed at the wide end and the narrow end of the main body, respectively. The interior of the body 21 has an elongated hollow cylindrical flow directing member 27 extending at its wide end (for example by welding);
This member has an opening 28 at the lower end and an opening 23 concentric with the opening 23 at the upper end.

The flow directing member 27 has at its upper end a flange 29 that fits tightly into the bore 31 of the body 21 and an elongated tubular portion 30 extending into the chamber 21 of the body 21, which portion 30 extends into the opening 25 of the body 21. It terminates in a short frusto-conical section with adjacent apertures 28. The nozzle opening 23 is formed by the upper part of the flow-directing IS 27. The frusto-conical portion of the body 21 terminates in a flat surface with a circular O-ring receiving groove 26, which accommodates an O-IJ ring that presses and seals the nozzle against the mixing head-in-the-ring. . When the inventive mixing head device is in operation, the nozzle 10 forms two liquid flow paths with a mixing-rad mode of operation. According to the invention, the mixing head is 1
3. In the recirculation mode, which has a shield loading mode and an injection mode, the liquid is pumped from the ffi', M tank to the head V and sent back to the storage tank in the continuous 1]η1 residue loop. During this mode, the mixhead plunger prevents the mixhead orifice closure 64 from entering the mixing chamber. However, in injection mode,
The plunger moves back to open the orifice of the mixing head insert and the liquid supplied to the mixing head insert is directed into the mixing chamber of the mixing head insert and mixed with other liquids. is generally poured into molds from a mixing chamber. In the recirculation mode, the flow of liquid through the openings 25 of the nozzle 10 is inhibited by breaking communication between the insert orifice and the openings 25, and liquid enters the nozzle 10 through the openings 23 and exits through the openings 28. Then, the nozzle LOi passes through the inside of the flow directing member 27 and exits through the space between the inside of the flow directing member 27 and the inside of the body 21 through the opening 24. This flow path creates a turbulent flow through the 7 bodies passing through the nozzle and opens 1.
23. Even if the liquid in the space between 1 and 25 is constantly replaced, optical fibers such as 1 to 7 + 1 (glass fiber glue) may precipitate if the nozzle 10 is not provided with glass fiber glue. Prevents 1-.

If the flow directing portion 27 is not provided, thick stagnant liquid will accumulate near the opening 25 during the scoop circulation mode. This stagnant layer of liquid separates from the liquid and closes the opening D 25 t.The blocking of the opening 25 is reduced or prevented by the nozzle arrangement shown in FIGS. 1 and 2.

Preferred shapes of the nozzle device according to the invention are shown in FIGS. 3 and 4.
It is shown in the figure. Nozzle 3 shown in Figures 3 and 4
0 is a flow similar to a blade)1. One structural defect is that the directing part 46 can be attached to the main body 41 (for example, by welding), which irritates the open 1 that is in contact with the two 1 that do not have the negative end of the nozzle formed. When used in the inventive mixhead apparatus, adjacent openings (-1) not marked with these numbers are closed by the housing of the mixhead. Alternatively, these numbers may be replaced with (= J' Cover the unopened opening with the main body 41] and open it (
For example, it can be closed by welding. To illustrate the operation of the nozzle 300 of the mixing head device according to the invention, the main body 41 and the flow-directing RIS4A' 46
It is necessary to close any openings that are not located between the top of the main body 41 and the main body 41 using one of the methods described above (i1'' recognition).Therefore, The nozzle 30 has an elongated cylindrical main body 41 having a longitudinal line 1111, an opening formed in the main body 41 extending along a longitudinal line lqn, and an opening formed in the main body 41. 43.44.45 (opening 44
111 ) in the longitudinal direction of the body 42 ) and a blade-like flow directing section 4246 which is accessible (for example by welding) into the body 41 over the wall diameter of the cavity 42 and an inventive mixing head device. A circular groove 47 is provided for accommodating a 14M-)Q-') ring that presses against the head insert and seals the nozzle 30. The body 41 has a wide upper end and a narrow lower end in the form of a short truncated section terminating in a flat surface with an opening 44 and an O-'J receiving circular groove 47. One of the ports 43 or 45 serves as a liquid inlet, and the other serves as a liquid outlet. In the recirculation mode described above, the flow of liquid through the aperture 44 is blocked by closing the inosert orifice communicating with the aperture 43,45, which is open. Thus, in recirculation mode, the liquid is e.g.
Enter the nozzle 30 through 45 and open 1 of nitrogen j5i 42
When the bIC is turned to 45, hold the side of the FIB 46 between the fingers and hold the force <t i s oo to open L] 43
The flow ascends the side of the flow directing member facing toward the flow direction and flows out of the opening 543. This powder θIL1 continuously sweeps the liquid in the vicinity of the aperture 44, thereby reducing or preventing the formation of a stagnant liquid layer in the aperture 44. If the liquid contains a primary filler (for example, a sled or a glass fiber), the stiffness channel will cause turbulence in the flow of the liquid, thereby causing the filling I4 to separate from the liquid at the equinox. t to reduce or prevent blocking of the opening [44]. During the injection cycle, a valve (not shown) external to the nozzle 30, as previously described.
From K, the opening 1'' 44 is opened and the opening 1 43 is closed, thereby entering the opening 1, i 45 P! The L body is made to exit from the opening 44 without passing through the bent flow path.

5, 6, 6, and 7 show an inventive mixing/throwing device (50). The housing 51 of the mixing head device 50 has a substantially circular fiJ shape with a flange shape at the lower end.
i or ii 1 (・sudenari (ft and e are by bolt)
, this nozzle block has the opening 1" 44 lined up with the supply port hole 61 of the Inosa-I of the Tsudoi Nozato 60.
Strain and insert the nozzle 30 into the holding housing 4511C. For example, the nozzle 30 is attached to the block 52 from the bath 1;
Mixed with Touring 75V - 11 closely matched to Tsudoi Nozato 60. Several phrases also refer to pipe 55.5 (see Figure 5).
The opening of the nozzle 30 is communicated with the mixing head device by a conventional hose (not shown) connected to the opening L'' 43.45 of the conventional unit:! l'
Storage tank (not shown) ((Connected to transport several bodies to the mixing head device.) - The cow ring 1 has a valve head 67 and a space that accommodates one reciprocating piston 70 to which a plunger 63 is connected. Location 66f: With a wall to form
Ru.

A plug 65 with an inlet lower 1 closes the cavity 66 to form a hydraulic seal, and this flange has a valve between the inlet lower 1 and the hydraulic oil fitting conduit 69 for conventional hydraulic oil supply and discharge. The grid is connected. The stem 68 of the flanger 63 extends downwardly into the chamber 62 of the flanger 60 and slides downwardly into the chamber 62, thereby opening and closing the orifice 72 and removing the remaining V-shaped body. Ijli exits from room 62.

When plunger 63 moves upward, orifice 72 opens allowing liquid to enter chamber 62.

The downward movement of plunger 63 closes orifice 72 and drains remaining liquid from chamber 62.

The mixing head insert 60 is attached to the housing 51 by a retaining ring 53 that is attached to the housing 51 by a bolt (not shown).
It is held within the shilling 51. In the self-circulation mode of the mixing head device described above, on August 8th, pressurized oil (-) is fed into the cavity 61 through the work inlet 61, moves the plunger 63 and stem 68 downward for 1 minute, and closes the orifice 72. One of the components to be mixed, the powder, is transported from the pump and liquid supply tank (not shown) to block 5.
The flow; I'1. Directional part 4:I
Flows toward the opening 44 along f46, and ends Hr, H of the chamber 62.
The direction is changed by 180° and the flow exits from the opening of the nozzle 20 (Fig.
In the injection cycle, surface pressure oil is supplied to the lower end of the cavity 66 via the public channel 69 to the piston. 70, thereby pulling up the plunger 63 so that the stem 68 exposes the chamber 62 and opens the orifice 72 to allow liquid to flow into the chamber 62 for impingement mixing. 3. Impingement mixing exposes multiple mills 72 simultaneously. A plurality of liquid streams enter chamber 62 at high pressure and velocity such that the liquid streams impinge or cross each other within chamber 62. The mixed liquid formed within chamber 62
The entering liquid flows continuously from chamber 62 under the force of gravity, aided by gravity. Any small amount of mixed liquid remaining in chamber 62 after mixing is expelled from chamber 62 by the force of plunger 63 moving down within chamber 62, completing the injection cycle. During the injection cycle, the opening 43 of the nozzle 30 is closed by an external valve (not shown) and the liquid entering the feed port hole 64 is directed to the opening 45.
The flow enters the cavity 42 (FIG. 4) through the interdigital spacing 46, exits the nozzle 30 through the opening 44, and passes through the insert feed hole 62 and the orifice 72 of the mixhead insert 60. It flows into the mixing chamber 62. nozzle 30
The flat end surface 78 of the C) -1j 7g housing groove 47 (
4) are provided to seal the nozzle 30 against the flat surface 77 of the mixhead insert 60.

Since it is generally preferred to mix a plurality of liquids, at least two of which are reactive dispersions, to produce a plastic molding, the mix head apparatus of the present invention will generally include two or more nozzle apparatuses of the present invention. There are more than 100 people. 6th
The figure and Figure 7 show the mixing of the present invention -\Rad device mixing-\
It is shown with two nozzle devices f'J30 arranged in opposing positions in contact with the Rad insert 60. In the present invention, these nozzle devices are arranged not facing each other (C can also be used).

FIGS. 8 and 9 are shown in FIGS. 5, 6, and 7. The insert 60 has a rectangular body portion 90 having chamfered edges and terminating in a circular flange portion 91 having a cylindrical section 92 extending from a flat surface at one end. A central hole extending through the insert 1-60, whose longitudinal axis is perpendicular to the diameter of the flange portion 91, forms a mixing chamber 62. A rectangular body parallel to the longitudinal axis of the chamber 62 Each side of section 90 defines an elongated feed port fA'' communicating with orifice 72 which opens into chamber 62.

The non-invention has been explained in detail with respect to many concrete examples.

. Other embodiments of the invention that will be apparent to those skilled in the art from the above description can be practiced without departing from the scope of the original carp described in the claims.

[Brief explanation of the drawing]

@ Figure 1 is a top view of the nozzle device according to the invention IC, Figure 2 is a vertical sectional view of the nozzle device according to the invention taken along line 2-2 in Figure 1, and Figure 3 is the invention (C) A top view of one preferred example of such a nozzle device, Figure 4 is 4 in Figure 3.
5 is a side view of the mixing head device according to the present invention; FIG. Figure 7 is an enlarged view of the upper middle part of the bottom of Figure 6.
The figure is a top view of the mixing head device, and FIG. 9 is a side view of the mixing head device. 10.30・Nozzle device, 21.41・・Main body, 22
．． 42.61... Blank space, 23.24.25.43.4
4.45・-Open [ko, 27・・Flow directing part 4A150・
...Head device, 51--Housing, 60-Insert, 62--Chamber, 63--Plunger, 69--
a body supply means, 72...orifice, 77...flat fc
ugly surface. Agent Patent Attorney Kyozo Yuasa (5 others) Fig, / Fig, 2 Fig, 3 Fig, 4 Fig, 5 Fig, 6 Fig, 7 Fig, 8 Fig, 9

Claims (1)

[Scope of Claims] (lla,) an elongated hollow cylindrical body forming a longitudinal axis and a cavity along said axis; b) a cavity for moving the body into and out of the cavity Vζ; C) three spaced openings in the body communicating with the body and at least one, but not all, of which are coaxial with the longitudinal axis; and C) fixedly mounted within the cavity and extending longitudinally. and a flow directing member extending in the direction of the line II and forming a liquid flow path bent at 180 degrees between the two holes D. (2) Furthermore, A nozzle device according to claim 1 having a flat surface having a circular groove for receiving a Q-IJ ring. 6 Features π1: The nozzle device according to claim 2. (4) Features d' in which the two narrow openings are coaxial with the longitudinal axis.
``A nozzle device according to claim 2. A nozzle device having (6) α) a retaining housing, and b) a wall forming a central cylindrical chamber open at both ends and a plurality of orifices in the wall communicating with the chamber for mixing the liquid. a mix head insert; C) a cylindrical plunger that is fluid-tight with the walls of the chamber and capable of reciprocating movement along the length of the chamber to open and close the orifice and evacuate residual liquid from the chamber; an improved mixhead apparatus for impingement mixing of at least two liquids, comprising: drive means for reciprocating the liquid; and e) means for supplying a liquid through an orifice to a mixing chamber; means consisting essentially of a nozzle for producing a turbulent flow of liquid; f) an elongated hollow cylindrical body having a longitudinal axis and a wall along said axis defining a cavity; three spaced openings provided in the wall for access and exit, at least one of which, but not all, are coaxial with the longitudinal axis; An improved mixing head apparatus characterized in that it consists of a flow-directed flow path extending in the direction of L and forming a 180 DEG curved main flow path between the two. (7) The mixing according to claim 6, wherein the nozzle has a flat surface resonating with one opening and a mixing heel insert mounted in sealing engagement with the mixing heel insert. \Rad device. (8) The mixing head device of claim 7, wherein the nozzle has a solid rectangular flow directing member. (9) The nozzle is coaxial with the longitudinal line l1II of the body. 8. The mixhead device of claim 8, wherein the mixhead insert has a flat surface that sealingly engages the nozzle. Mixing-\rad device according to claim 9. (n) Mixing head device according to claim 6, having at least two nozzles.