Mixing and discharging device

Abstract

Provided is a simple and inexpensive mixing and discharging device with which it is possible to suppress dropping liquid at a discharge port using a disposable dynamic mixer. This mixing and discharging device (1) is provided with: a main body (2) having a rotatable mixing shaft (5); and a mixer (3) detachably attached to the main body, the mixer having a housing (21) and a rotor (22), the rotor having a through-hole (31) formed therein, the through-hole being provided with an engaged portion (32) into which an engagement portion (12) provided on the mixing shaft can be engaged by the penetration of the mixing shaft, and the rotor being capable of rotating integrally with the mixing shaft by the engagement of the engagement portion and the engaged portion. Furthermore, a valve element (11) is provided at the tip of the mixing shaft, a valve seat (25) is provided at the bottom of the housing, and the mixing shaft is provided so as to be capable of moving in the axial direction between an open position (A) at which the valve element is separated from the valve seat to open a discharge port (24) and a closed position (B) at which the valve element is seated on the valve seat to close the discharge port.

Description

Technical Field

[0001] The present invention relates to a mixing and discharging device, and more particularly, to a mixing and discharging device for mixing and discharging a plurality of liquid materials. Background Art

[0002] As a conventional mixing and discharging device, there is generally known a device for mixing and discharging a plurality of liquid materials (for example, see Patent Documents 1 and 2). Patent Documents 1 and 2 describe the following technology: a valve mechanism for opening and closing a discharge port is provided at the bottom of a dynamic mixer (rotary mixer), and the discharge port is closed by the valve mechanism when the mixer stops working, thereby preventing the liquid material in the mixer from falling (i.e., dripping) from the discharge port.

[0003] Here, as a mixer, a disposable mixer (for example, referring to patent document 3) that can be detachably mounted on a main body having a mixing shaft etc. is sometimes used. According to the disposable mixer, it is possible to improve maintainability without the need for cleaning of the mixer after use. However, if the dynamic mixer having the valve mechanism for dripping suppression is set as disposable, the number of components is large and becomes a complex and expensive structure. In particular, the valve mechanism (valve core and valve seat) is discarded each time the mixer is replaced, and the running cost increases.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application No. 2018-529544

[0007] Patent Document 2: Japanese Patent Application Laid-Open No. 07-171464

[0008] Patent Document 3: Japanese Patent Application Publication No. 2000-094438 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] The present invention has been made in view of the above-mentioned current situation, and an object of the present invention is to provide a mixing and discharging device with a simple and inexpensive structure that can suppress dripping at a discharge port in a system using a disposable dynamic mixer.

[0011] Solutions for solving problems

[0012] The present invention is as follows.

[0013] 1. A mixing and discharging device, which mixes and discharges a plurality of liquid materials, characterized in that:

[0014] The mixing and discharging device comprises:

[0015] a body having a mixing axis capable of rotating; and

[0016] a mixer detachably mounted on the main body,

[0017] The mixer includes a housing having a discharge port formed at the bottom and a rotor accommodated in the housing.

[0018] The rotor is provided with a through hole through which the mixing shaft can pass.

[0019] The through hole is provided with an engaged portion capable of being engaged with an engaging portion provided on the mixing shaft by the mixing shaft passing through the through hole.

[0020] The rotor is capable of rotating integrally with the mixing shaft by engagement between the engaging portion and the engaged portion.

[0021] A valve core is provided at the top end of the mixing shaft.

[0022] A valve seat is provided at the bottom of the housing for the valve core to seat on.

[0023] The mixing shaft is provided to be movable in the axial direction between an open position where the valve element is separated from the valve seat to open the discharge port and a closed position where the valve element is seated on the valve seat to close the discharge port.

[0024] 2. The mixing and discharging device according to 1. above, wherein:

[0025] The rotor is movable in the axial direction integrally with the mixing shaft due to the engagement between the engaging portion and the engaged portion.

[0026] 3. The mixing and discharging device according to 1. or 2. above, wherein:

[0027] The mixer has a blocking member for blocking an upper opening of the housing.

[0028] An inlet for allowing a liquid material to flow into a mixing chamber surrounded by the housing and the sealing member is provided on an outer peripheral portion of the housing.

[0029] 4. The mixing and discharging device according to 3. above, wherein:

[0030] The housing, the rotor, and the sealing member are made of synthetic resin.

[0031] Effects of the Invention

[0032] According to the mixing and discharging device of the present invention, by adopting a mixer that can be detachably mounted on the main body and has a rotor that can rotate integrally with the mixing shaft, i.e., a disposable dynamic mixer, it is possible to improve maintainability by eliminating the need for cleaning of the mixer after use, and no cleaning waste liquid is generated, thereby also eliminating the deterioration of the working environment caused by organic solvent dust and mist. In addition, when the mixer stops working, the mixing shaft is moved from an open position to a closed position, so that the valve core is seated on the valve seat and the discharge port is closed, thereby suppressing dripping at the discharge port. Moreover, a valve core is provided at the top end of the mixing shaft, a valve seat is provided at the bottom of the housing of the mixer, and the valve core is reused when the mixer is replaced, thereby reducing the number of components of the mixer and becoming a simple and inexpensive structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described in the following detailed description by way of non-limiting examples of typical embodiments of the present invention and with reference to the several drawings mentioned, wherein like reference numerals represent like parts throughout the several views of the drawings.

[0034] Figure 1 is an explanatory diagram of a mixing and discharging device according to an embodiment, Figure 1 (a) represents the overall stereogram, Figure 1 (b) shows an exploded perspective view of the main parts.

[0035] Figure 2 This is a front view showing a part of the mixing and discharging device in cross section.

[0036] Figure 3 is an explanatory diagram of a mixer according to an embodiment, Figure 3 (a) is a cross-sectional view showing a state where a mixing shaft is passed through. Figure 3 (b) means Figure 3 (a) The decomposition state of.

[0037] Figure 4 This is a cross-sectional view of the mixer (mixing shaft through the state), Figure 4 (b) means from Figure 4 (a) is a stereoscopic image when viewed from below, Figure 4 (c) indicates that Figure 4 (a) is a stereoscopic image when viewed from above.

[0038] Figure 5 This is a cross-sectional view of the mixer (mixing shaft is not penetrated). Figure 5 (b) means from Figure 5 (a) is a stereoscopic image when viewed from below, Figure 5 (c) indicates that Figure 5 (a) is a stereoscopic image when viewed from above.

[0039] Figure 6 This is a diagram illustrating the function of the mixing and discharging device. Figure 6 (a) represents the working state of the mixer, Figure 6 (b) indicates the mixer is stopped. Figure 6 (c) shows a state where the mixer is being removed from the main body.

[0040] Figure 7 This is a cross-sectional view of another type of mixer. DETAILED DESCRIPTION

[0041] The matters shown here are illustrative matters and matters used to illustratively illustrate the embodiments of the present invention, and are described for the purpose of providing matters that are considered to be the most effective and easy to understand the principles and conceptual features of the present invention. In this regard, it is not intended to show the structural details of the present invention beyond the extent required for a fundamental understanding of the present invention, but to reveal to those skilled in the art how some aspects of the present invention are actually implemented through the description combined with the accompanying drawings.

[0042] The present invention will be described in detail below using the accompanying drawings and embodiments. In addition, in this embodiment, as the "mixing and discharging device" of the present invention, a mixing and discharging device (coating machine) that mixes two liquid materials, a main agent and a curing agent, and discharges a two-component adhesive (polyurethane, epoxy resin, silicone, etc.) is exemplified.

[0043] like Figure 1 and Figure 2 As shown, the mixing and discharging device 1 of this embodiment comprises: a main body 2 having a rotatable mixing shaft 5; and a mixer 3 which is detachably mounted on the main body 2. The main body 2 comprises the mixing shaft 5, a motor 6 for rotating the mixing shaft 5 around the axis, and a moving mechanism 7 for moving the mixing shaft 5 in the axial direction. The main body 2 further comprises a base 8 (see FIG. 1 ) for supporting the motor 6 and the moving mechanism 7. Figure 2 The base 8 includes a lower base 8a and an upper base 8b disposed above the lower base 8a via support columns 9.

[0044] The mixing shaft 5 is made of metal. A valve core 11 capable of being seated on a valve seat 25 described later is provided at the top end of the mixing shaft 5. The valve core 11 is formed into a needle shape. In addition, a clamping portion 12 that is clamped with a clamped portion 32 described later is provided on the mixing shaft 5. The cross-sectional shape of the clamping portion 12 that is orthogonal to the axial direction of the mixing shaft 5 is formed into a regular polygon (specifically, a regular hexagon). Moreover, the cross-sectional shape of the portion of the mixing shaft 5 that is connected to the clamping portion 12 in the axial direction and is orthogonal to the axial direction is formed into a circle. In addition, the material of the mixing shaft 5 is not particularly limited, and for example, it may be made of ceramic. Moreover, as the valve core 11, in addition to the needle shape, a valve core formed into a hemispherical shape or the like may also be adopted.

[0045] The motor 6 is mounted on the upper base 8b. The drive shaft 6a of the motor 6 is connected to the mixing shaft 5 via a coupling 13 that allows the mixing shaft 5 to move in the axial direction. The coupling 13 includes a rotating body 13a mounted on the drive shaft 6a and a rotating body 13b mounted on the mixing shaft 5. A plurality of sliding shafts 14 are provided on one of the rotating bodies 13a and 13b, and a sleeve 15 through which the sliding shaft 14 can pass is provided on the other.

[0046] The moving mechanism 7 moves the mixing shaft 5 to the open position A (see FIG. 1 ) where the valve element 11 and the valve seat 25 are separated and the discharge port 24 is opened. Figure 6 (a)) and the closed position B (refer to Figure 6 (b)) between the mixing shaft 5 and the mixing shaft 5. The moving mechanism 7 includes: a bearing 17 (specifically, a deep groove ball bearing) which is arranged to be immovable in the axial direction of the mixing shaft 5 and to support the mixing shaft 5 so as to be rotatable; and a cylinder device 18 (specifically, a cylinder device) which moves the bearing 17 in the axial direction. The cylinder device 18 is mounted on the upper base 8b. In addition, a clamping portion 19 for clamping the bearing 17 in the axial direction is provided on the piston rod 18a of the cylinder device 18.

[0047] In addition, as the moving mechanism 7, a mechanism including a ball screw device or the like instead of the cylinder device 18 may be adopted. In addition, a mechanism including a plurality of cylinder devices 18 may be adopted. Furthermore, a mechanism including a plurality of bearings 17 may be adopted.

[0048] like Figure 3 to Figure 5 As shown, the mixer 3 includes a housing 21 having a discharge port 24 formed at the bottom thereof, and a rotor 22 housed in the housing 21. The mixer 3 further includes a blocking member 23 for blocking an upper opening of the housing 21.

[0049] The housing 21 is made of synthetic resin. The housing 21 is formed into a bottomed cylindrical shape with an open top. A nozzle-shaped discharge port 24 is provided protruding downward at the center of the bottom of the housing 21. In addition, a valve seat 25 (valve seat) on which the valve core 11 of the mixing shaft 5 can be seated is provided at the bottom of the housing 21 (specifically, the portion directly above the discharge port 24).

[0050] The outer periphery of the housing 21 is provided with an inlet 26 for allowing the liquid material to flow into the mixing chamber S surrounded by the housing 21 and the sealing member 23. By inserting and removing the injection port 27a of the valve 27 relative to the inlet 26, the housing 21 (i.e., the mixer 3) is detachably mounted on the main body 2 (i.e., the base 8) (see Figure 2 However, as the housing 21, a housing that is detachably mounted on the main body 2 by locking, screwing, pressing, etc. may be used.

[0051] In addition, the liquid material is supplied to the valve 27 by a mechanism for pressurizing liquid, which is also called a dispensing system (for example, a type that squeezes out liquid by pressurized air, a type that uses a pump, etc.), and the supply of the liquid material to the inlet 26 is supplied / stopped by the opening and closing action of the valve 27. In addition, the injection port 27a is provided so as to be movable in a direction (horizontal direction) orthogonal to the axial direction of the mixing shaft 5 relative to the main body of the valve 27 by an actuator (not shown) (see FIG. Figure 6 However, as the valve 27, a valve that is provided so as to be movable in the horizontal direction as a whole including the injection port 27a may be adopted.

[0052] The rotor 22 is made of synthetic resin. The rotor 22 is housed in the mixing chamber of the shell in such a way that its axis is roughly consistent with the axis of the shell. In addition, a through hole 31 (center hole) through which the mixing shaft 5 can pass is formed in the rotor 22. A clamped portion 32 that can be clamped by the clamping portion 12 through the mixing shaft 5 is provided in the through hole 31. The cross-sectional shape of the clamped portion 32 that is orthogonal to the axial direction of the mixing shaft 5 is formed into a regular polygon (specifically, a regular hexagon) corresponding to the clamping portion 12. In addition, a support portion 33 that supports the portion between the clamping portion 12 and the valve core 11 in the mixing shaft 5 is provided in the through hole 31. The cross-sectional shape of the support portion 33 that is orthogonal to the axial direction of the mixing shaft 5 is formed into a circular shape. Moreover, a plurality of radially extending stirring blades 34 are provided in the rotor 22 along the axial direction. Furthermore, the engaging portion 12 and the engaged portion 32 may be configured in a spline connection, a key connection, or the like in which at least a portion of the cross section is polygonal in addition to the entire cross section being polygonal in shape.

[0053] Here, the rotor 22 can rotate integrally with the mixing shaft 5 by the engagement of the engagement portion 12 and the engaged portion 32. Moreover, the rotor 22 can move integrally with the mixing shaft 5 in the axial direction by the engagement of the engagement portion 12 and the engaged portion 32. Moreover, by the engagement of the engagement portion 12 and the engaged portion 32, the passage of the liquid material between the through hole 31 of the rotor 22 and the outer peripheral surface of the mixing shaft 5 is restricted.

[0054] In addition, the rotor 22 and the mixing shaft 5 may be configured to move in the axial direction as a whole regardless of the viscosity of the liquid material, or may be configured to move in the axial direction as a whole when the viscosity of the liquid material is below a predetermined value, and not move in the axial direction as a whole when the viscosity of the liquid material is greater than the predetermined value. Furthermore, a configuration may be adopted in which the rotor 22 and the mixing shaft 5 do not move in the axial direction as a whole regardless of the viscosity of the liquid material.

[0055] The sealing member 23 is made of synthetic resin. The sealing member 23 is inserted into the housing 21 in a manner of sealing the upper opening of the housing 21. In addition, a through hole 37 through which the mixing shaft 5 can pass is formed in the center of the sealing member 23. A recess 39 is provided in the through hole 37, and a sealing member 38 for sealing between the sealing member 23 and the mixing shaft 5 is installed in the recess 39. In addition, the sealing member 23 is installed in the housing 21 by locking, threading, pressing, bonding, etc. Moreover, the shape of the sealing member 23 is not particularly limited, and for example, it can also be a complex shape (upper surface side shape) in a manner of assisting the function of the shaft sealing unit.

[0056] Next, the effect of the mixing and discharging device 1 of the above structure is described. When the mixer 3 is working (i.e., when the motor 6 is driven), Figure 6 As shown in (a), the mixing shaft 5 is located at the open position A, the valve core 11 is separated from the valve seat 25, and the discharge port 24 is opened. In addition, due to the integral rotation of the mixing shaft 5 and the rotor 22, the liquid material flowing in from the inlet 26 is mixed in the mixing chamber S and discharged from the discharge port 24.

[0057] On the other hand, when the mixer 3 stops working (i.e., when the motor 6 stops driving), Figure 6 As shown in (b), the mixing shaft 5 at the open position A is moved (lowered) to the closed position B by the moving mechanism 7, and the valve core 11 is seated on the valve seat 25 to close the discharge port 24. Thereafter, when the mixer is operated again, the mixing shaft 5 at the closed position B is moved (raised) to the open position A by the moving mechanism 7 to open the discharge port 24.

[0058] In addition, when replacing the mixer 3, if Figure 6 As shown in (c), the injection port 27a is pulled out from the inlet 26 by horizontal movement, and the mixer 3 is removed from the body 2. At this time, the rotor 22 is pulled out from the mixing shaft 5 on the body 2 side, and the valve core 11 is left on the body 2 side and reused.

[0059] As described above, the mixing and discharging device 1 of the present embodiment comprises: a main body 2 having a rotatable mixing shaft 5; and a mixer 3 detachably mounted on the main body 2, the mixer 3 comprising a housing 21 having a discharge port 24 formed at the bottom thereof and a rotor 22 accommodated in the housing 21, the rotor 22 having a through hole 31 through which the mixing shaft 5 can pass, the through hole 31 being provided with an engaged portion 32 that can be engaged with an engaging portion 12 provided on the mixing shaft 5 through the passing of the mixing shaft 5, and the rotor 22 being able to rotate integrally with the mixing shaft 5 by the engagement of the engaging portion 12 with the engaged portion 32. Furthermore, a valve core 11 is provided at the top end of the mixing shaft 5, a valve seat 25 on which the valve core 11 can be seated is provided at the bottom of the housing 21, and the mixing shaft 5 is provided so as to be able to move in the axial direction between an open position A in which the valve core 11 is separated from the valve seat 25 to open the discharge port 24 and a closed position B in which the valve core 11 is seated on the valve seat 25 to close the discharge port 24.

[0060] Thus, by adopting a mixer 3 that is detachably mounted on the main body 2 and has a rotor 22 that can rotate integrally with the mixing shaft 5, i.e., a disposable dynamic mixer 3, it is possible to improve maintainability by eliminating the need for cleaning of the mixer 3 after use, and no cleaning waste liquid is generated, thereby also eliminating the deterioration of the working environment caused by organic solvent dust and mist. In addition, when the mixer 3 stops working, the mixing shaft 5 is moved from the open position A to the closed position B, so that the valve core 11 is seated on the valve seat 25 and the discharge port 24 is closed, thereby suppressing dripping at the discharge port 24. Moreover, the valve core 11 is provided at the top end of the mixing shaft 5, and the valve seat 25 is provided at the bottom of the housing 21 of the mixer 3, and the valve core 11 is reused when the mixer 3 is replaced, thereby reducing the number of components of the mixer 3 and forming a simple and inexpensive structure.

[0061] In addition, in the present embodiment, the rotor 22 can be moved in the axial direction integrally with the mixing shaft 5 by the engagement of the engagement portion 12 and the engaged portion 32. Thus, wear caused by sliding between the through hole 31 of the rotor 22 and the outer peripheral surface of the mixing shaft 5 can be prevented, and even during long-term use of the mixer 3, the liquid material can be restricted from passing between the through hole 31 and the mixing shaft 5.

[0062] In addition, in the present embodiment, the mixer 3 has a blocking member 23 that blocks the upper opening of the housing 21, and an inlet 26 for the liquid material to flow into the mixing chamber S surrounded by the housing 21 and the blocking member 23 is provided on the outer periphery of the housing 21. Thus, the injection path of the liquid material can be simplified, and the mixer 3 can be made into a simpler and cheaper structure. In particular, in the present embodiment, the housing 21 (i.e., the mixer 3) can be loaded and unloaded relative to the main body 2 by plugging and unplugging the injection port 27a relative to the inlet 26, so that the mixer 3 can be made into a simpler and cheaper structure.

[0063] Furthermore, in the present embodiment, the housing 21, the rotor 22, and the sealing member 23 are made of synthetic resin. This allows the mixer 3 to have a simpler and cheaper structure.

[0064] In addition, the present invention is not limited to the above-mentioned embodiment, and various changes can be made within the scope of the present invention according to the purpose and application. Figure 7 As shown, a sealing member 41 for sealing between the rotor 22 and the outer peripheral surface of the mixing shaft 5 may be provided in the through hole 31 of the rotor 22. In this case, in addition to the engagement between the engaging portion 12 and the engaged portion 32, the rotor 22 can also be moved in the axial direction integrally with the mixing shaft 5 by the pressing force of the sealing member 41.

[0065] In the above embodiment, an example of providing the inlet 26 in the housing 21 is described, but the present invention is not limited thereto, and for example, the inlet 26 may be provided in the blocking member 23 .

[0066] Furthermore, in the above-described embodiment, the mixing and discharging device 1 that mixes and discharges two liquid materials is exemplified, but the present invention is not limited thereto, and for example, the mixing and discharging device 1 that mixes and discharges three or more liquid materials may be used.

[0067] The present invention is not limited to the above-described detailed embodiments, and various modifications and changes can be made within the scope of the claims of the present invention.

[0068] Industrial Applicability

[0069] The present invention is widely used as a technology for mixing and discharging a plurality of liquid materials in the production process of automobile parts, various sensors, home appliance substrates, and the like.

[0070] Description of Reference Numerals

[0071] 1. Mixing and discharging device; 2. Main body; 3. Mixer; 5. Mixing shaft; 11. Valve core; 12. Engaging portion; 21. Shell; 22. Rotor; 23. Sealing member; 24. Discharge port; 25. Valve seat; 26. Inlet; 31. Through hole; 32. Engaged portion; A. Open position; B. Closed position; S. Mixing chamber.

Claims

1. A mixing and discharging device, which mixes and discharges a plurality of liquid materials, characterized in that: The mixing and discharging device comprises: a body having a mixing axis capable of rotating; and a mixer detachably mounted on the main body, The mixer includes a housing having a discharge port formed at the bottom and a rotor accommodated in the housing. The rotor is provided with a through hole through which the mixing shaft can pass. The through hole is provided with an engaged portion capable of being engaged with an engaging portion provided on the mixing shaft by the mixing shaft passing through the through hole. The rotor is capable of rotating integrally with the mixing shaft by engagement between the engaging portion and the engaged portion. A valve core is provided at the top end of the mixing shaft. A valve seat is provided at the bottom of the housing for the valve core to seat on. The mixing shaft is provided to be movable in the axial direction between an open position where the valve element is separated from the valve seat to open the discharge port and a closed position where the valve element is seated on the valve seat to close the discharge port.

2. The mixing and discharging device according to claim 1, wherein: The rotor is movable in the axial direction integrally with the mixing shaft due to the engagement between the engaging portion and the engaged portion.

3. The mixing and discharging device according to claim 1 or 2, wherein: The mixer has a blocking member for blocking an upper opening of the housing. An inlet for allowing a liquid material to flow into a mixing chamber surrounded by the housing and the sealing member is provided on an outer peripheral portion of the housing.

4. The mixing and discharging device according to claim 3, wherein: The housing, the rotor, and the sealing member are made of synthetic resin.

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