JP5655264B2 - Defoaming mechanism and manufacturing method thereof - Google Patents

Description

  The present invention relates to a technique for removing bubbles from a liquid in a liquid supply path in a liquid ejecting apparatus.

  In an ink jet printer, if bubbles occur in ink in an ink supply path from an ink supply unit such as an ink cartridge to a recording head, printing defects such as missing dots may be caused. Therefore, it is required to remove bubbles (defoaming) from the ink. As a mechanism for performing this defoaming, a chamber (defoaming chamber) for temporarily storing ink and trapping bubbles is adjacent to a decompression chamber via a gas-permeable partition, and the pressure in the decompression chamber is adjusted. A mechanism for removing bubbles trapped in the defoaming chamber by lowering the pressure is proposed (see Patent Document 1 below).

JP 2006-95878 A

  In the defoaming mechanism, the thinner the partition between the defoaming chamber and the decompression chamber, the easier it is to remove bubbles and the defoaming ability is improved. However, if this partition wall is made thin, there is a problem that it is not possible to obtain sufficient strength to withstand repeated use of pressure reduction / pressure increase. Such a problem may occur not only in an ink jet printer but also in any liquid ejecting apparatus that ejects liquid such as lubricating oil or resin liquid.

  An object of this invention is to provide the technique which can improve the defoaming capability, raising the intensity | strength of a defoaming mechanism.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.
[Embodiment 1] A defoaming mechanism for removing bubbles from a liquid flowing in the liquid ejecting apparatus, a defoaming chamber for capturing air bubbles in the liquid, and the reduced pressure chamber, and the defoaming chamber A gas-permeable partition wall interposed between the depressurization chamber and the defoaming chamber and the depressurization chamber, respectively , and the defoaming mechanisms are each formed as a single member and laminated. The partition portion is formed on one of the plurality of plates, and the surface of the partition portion facing the defoaming chamber includes a recess and a protrusion. A defoaming mechanism having a reinforcing shape.

  [Application Example 1] A defoaming mechanism for removing bubbles from a liquid flowing in a liquid ejecting apparatus, having a first wall having gas permeability, and degassing for capturing bubbles in the liquid A bubble chamber and a decompression chamber having a gas permeable second wall and in contact with the defoaming chamber via the second wall and the first wall, the first wall And at least one of the second wall and the defoaming mechanism having a reinforcing shape.

  In the defoaming mechanism of Application Example 1, at least one of the first wall in contact with the decompression chamber in the defoaming chamber and the second wall in contact with the defoaming chamber in the decompression chamber has a reinforcing shape. The strength of the foam mechanism can be increased, and the first wall and the second wall can be thinned to improve the defoaming ability.

  Application Example 2 In the defoaming mechanism according to Application Example 1, the reinforcing shape includes a rib shape having a cross section in which thick portions and thin portions are alternately arranged, and a cross section having a corrugated shape and a flat surface. Is a defoaming mechanism, which is either a streak-like corrugated shape or a dot shape in which thick or thin portions are scattered.

  By doing in this way, the intensity | strength between a defoaming chamber and a decompression chamber can be raised, and thickness can be made small in at least one part between a defoaming chamber and a decompression chamber. Moreover, the surface area of a 1st wall or a 2nd wall can be enlarged, and a defoaming capability can be improved.

  Application Example 3 The defoaming mechanism according to Application Example 2, wherein the first wall and the second wall are formed as a single member.

  By doing in this way, the number of parts in a defoaming mechanism can be reduced, and the manufacturing cost of a defoaming mechanism can be held down.

  Application Example 4 In the defoaming mechanism according to Application Example 2 or Application Example 3, the first wall has the reinforcing shape, and the reinforcing shape is the rib shape or the wave shape. A defoaming mechanism in which the longitudinal direction of the rib shape or the streak direction of the corrugated shape and the inflow direction of the liquid in the defoaming chamber intersect each other.

  By doing in this way, the contact area with the liquid in the first wall can be increased, and a large amount of bubbles can be trapped in the first wall. Moreover, even when the liquid flows into the defoaming chamber, the state where the bubbles are captured in the first wall can be maintained, and the bubbles are prevented from flowing downstream from the defoaming chamber. it can.

  Application Example 5 In the defoaming mechanism according to Application Example 3, the planar shape of the single member is a rectangle, the reinforcing shape is the rib shape or the wave shape, and the length of the rib shape A defoaming mechanism in which a direction or a streak direction of the corrugated shape and a direction from a side having an inflow position of the molding material when molding the single member to the opposite side in the rectangle are parallel to each other.

  By doing in this way, the flow direction of the molding material in the portions corresponding to the first wall and the second wall of the molding die is made parallel to the longitudinal direction of the rib shape or the streak direction of the corrugated shape. Can do. Therefore, the flowability of the molding material inside the molding die can be increased, and the formation of a hole in a single member without being filled with the molding material can be suppressed.

  Application Example 6 A defoaming mechanism for removing bubbles from the liquid flowing in the liquid ejecting apparatus, the defoaming unit for capturing the bubbles in the liquid, and surrounding the defoaming unit A defoaming mechanism, wherein the defoaming part has a wall having gas permeability, and the wall has a reinforcing shape.

  In the defoaming mechanism of the application example 6, since the wall of the defoaming portion has a reinforcing shape, the strength of the defoaming mechanism can be increased, and the defoaming chamber can be thinned to improve the defoaming ability. Can do.

  Application Example 7 A defoaming mechanism for removing bubbles from the liquid flowing in the liquid ejecting apparatus, the defoaming chamber for capturing the bubbles in the liquid, and the decompression disposed in the defoaming chamber A degassing mechanism, wherein the decompression chamber has a gas-permeable wall, and the wall has a reinforcing shape.

  In the defoaming mechanism of the application example 7, since the wall of the decompression chamber has a reinforcing shape, the strength of the defoaming mechanism can be increased, and the defoaming capability can be improved by thinly configuring the decompression chamber wall. it can.

  Application Example 8 A liquid ejecting apparatus including the defoaming mechanism according to any one of Application Examples 1 to 7.

  By doing so, a large amount of bubbles can be removed from the liquid flowing through the liquid ejecting apparatus, and the strength of the defoaming mechanism can be increased, so that the failure frequency as the liquid ejecting apparatus can be kept low. it can.

  Application Example 9 A manufacturing method of a defoaming mechanism for removing bubbles from a liquid flowing in a liquid ejecting apparatus, comprising: (a) a first wall having gas permeability, and bubbles in the liquid Forming a member of a defoaming chamber for capturing gas, (b) forming a member of a decompression chamber having a second wall having gas permeability, (c) the first wall and the Joining the member of the defoaming chamber and the member of the decompression chamber so that the defoaming chamber and the decompression chamber are in contact with each other through a second wall, and the step (a) And at least one of the step (b) is (d) a rib shape having a cross section in which the thick wall portion and the thin wall portion are alternately arranged on the first wall or the second wall, or The step (d) includes the step of (e) the member for the defoaming chamber. Alternatively, in the member mold for the decompression chamber, a step of molding the member of the defoaming chamber or the member of the decompression chamber by flowing a molding material along the longitudinal direction of the rib shape or the streak direction of the corrugated shape A method for producing a defoaming mechanism.

  In the defoaming mechanism manufacturing method of the application example 9, in the mold for the member of the defoaming chamber or the mold for the member of the decompression chamber, the molding material flows along the longitudinal direction of the rib shape or the muscle direction of the corrugated shape. It is possible to improve the flowability of the molding material inside the mold, and to prevent the first wall or the second wall from opening without being filled with the molding material.

A. First embodiment:
A1. Device configuration:
FIG. 1 is an explanatory diagram showing a schematic configuration of a printer 500 including a carriage 100 as a defoaming mechanism of the present invention. The printer 500 is an ink jet printer that can eject inks of four colors (black, cyan, magenta, and yellow). The printer 500 includes an ink cartridge IC1 for black ink, an ink cartridge IC2 for cyan ink, an ink cartridge IC3 for magenta ink, an ink cartridge IC4 for yellow ink, a carriage 100, a recording head 150, a guide rod 260, A platen 270, four ink supply pumps 220a, 220b, 220c, and 220d, and a pressure reducing pump 300 are provided.

  The printer 500 is a so-called off-carriage type printer in which four ink cartridges IC1 to IC4 are mounted on the printer body side. The ink cartridge IC1 is connected to the carriage 100 via a tube t1, an ink supply pump 220a, and a tube t11. Similarly, the ink cartridge IC2 is connected to the tube t2, the ink supply pump 220b, and the tube 12, the ink cartridge IC3 is connected to the tube t3, the ink supply pump 220c, and the tube t13, and the ink cartridge IC4 is connected to the tube t4. The ink supply pump 220d and the tube 14 are connected to the carriage 100, respectively. The decompression pump 300 is connected to the carriage 100 via a tube t5. Each of the ink cartridges IC1 to IC4 is attached to a main body frame (not shown) of the printer 500 by a cartridge holder (not shown).

  The ink supply pump 220a supplies the black ink in the ink cartridge IC1 to the carriage 100. Similarly, the ink supply pump 220b carries cyan ink in the ink cartridge IC2, the ink supply pump 220c carries magenta ink in the ink cartridge IC3, and the ink supply pump 220d carries yellow ink in the ink cartridge IC4. 100. The decompression pump 300 is used in common for each color (black, cyan, magenta, yellow).

  The guide rod 260 is disposed along the longitudinal direction (Z axis) of the platen 270 above the platen 270 (+ Y direction). The carriage 100 is supported so as to be movable in the longitudinal direction of the platen 270 along the guide rod 260, and is driven by a carriage motor (not shown) via a timing belt (not shown). The recording head 150 is disposed on the bottom surface of the carriage 100 and ejects ink droplets downward (−Y direction) from a number of nozzles (not shown) as the carriage 100 reciprocates in the longitudinal direction. At this time, the recording paper P is fed in the + X direction on the platen 270 by a paper feeding mechanism (not shown), and an image or the like is formed on the recording paper P.

  FIG. 2A is an explanatory diagram illustrating a state of the carriage 100 and the recording head 150 during ink ejection. FIG. 2A schematically shows functions of the carriage 100. FIG. 2A shows a function related to the supply of black ink, but the same applies to the function related to the supply of ink of other colors.

  The carriage 100 includes a filter chamber 60, an air chamber 87, a first pressure chamber 77, a first pressure regulating valve 71, a defoaming chamber 92, a decompression chamber 80, a second pressure chamber 89, and a second pressure regulating chamber. A pressure valve 81, three internal flow paths 62, 64, 79 through which ink flows and a negative pressure supply path 358 are provided.

  The filter chamber 60 includes a filter 61 inside and is used for removing impurities by filtering inflowed ink. The filter chamber 60 communicates with the tube t11 through the internal flow path 62. Further, the filter chamber 60 communicates with a valve chamber 70 described later via an internal flow path 64. The atmosphere chamber 87 communicates with the atmosphere via the atmosphere communication hole 99.

  The first pressure chamber 77 is used to temporarily store black ink and adjust the pressure in the ink supply path in the carriage 100. The first pressure chamber 77 is adjacent to the atmospheric chamber 87 with a partition wall 88b that is a ceiling portion interposed therebetween. The partition wall portion 88b has flexibility and can be displaced in the vertical direction. The partition wall portion 88b can be formed of, for example, a film made of synthetic resin, rubber, or the like and a cantilever (not shown) thin plate member that can be displaced together with the film. The first pressure chamber 77 includes an ink inlet 76 and communicates with a valve chamber 70 described later via the ink inlet 76. The first pressure chamber 77 communicates with the defoaming chamber 92 through the internal flow path 79.

  The first pressure regulating valve 71 is used to control the distribution of black ink. The first pressure regulating valve 71 includes a valve chamber 70, a valve body 72, a pressure adjustment spring 73, a seal member 75, and a support rod 74. The valve chamber 70 communicates with the internal flow path 64. The valve body 72 is disposed in the valve chamber 70 and is urged toward the sealing position by the pressure adjusting spring 73. The valve body 72 is displaceable between an open position where the first pressure chamber 77 and the valve chamber 70 are in communication with each other and a sealing position where the first pressure chamber 77 and the valve chamber 70 are out of communication. Specifically, when the ink is discharged from the first pressure chamber 77, the force that pushes down the valve body 72 (the pressing force of the support rod 74 by the partition wall portion 88b and the pressure in the first pressure chamber 77) is reduced. When it becomes larger than the force pushing up 72 (the pressure in the valve chamber 70 and the biasing force of the pressure adjusting spring 73), the valve body 72 is displaced toward the open position. Further, when ink flows into the first pressure chamber 77 and the force for pushing down the valve body 72 becomes smaller than the force for pushing up the valve body 72, the valve body 72 is displaced toward the sealing position. In the example of FIG. 2A, the valve body 72 is located at the open position. The seal member 75 is disposed on the upper surface of the valve body 72 and seals the ink from flowing from the valve chamber 70 to the first pressure chamber 77 when the valve body 72 is disposed at the sealing position. The support rod 74 is disposed across the valve chamber 70 and the first pressure chamber 77, one end is joined to the valve body 72, and the other end is joined to the partition wall portion 88 b of the first pressure chamber 77.

  The defoaming chamber 92 is used for temporarily storing ink flowing from the internal flow path 79 and capturing bubbles. The defoaming chamber 92 includes a filter 93 inside. The defoaming chamber 92 communicates with the internal flow path 79 on the upper side of the filter 93. The defoaming chamber 92 is also in communication with the ink discharge channel 95. The filter 93 has a function of making it difficult for air bubbles mixed in the ink supply path to pass therethrough and trapping air bubbles at the ceiling of the defoaming chamber 92.

  The decompression chamber 80 is used to remove bubbles from the ink trapped in the defoaming chamber 92 by utilizing the pressure difference between the defoaming chamber 92. The decompression chamber 80 is disposed above the defoaming chamber 92 and is adjacent to the defoaming chamber 92 through a partition wall 90 having gas permeability.

  The second pressure chamber 89 is used to supply the negative pressure supplied from the decompression pump 300 to the decompression chamber 80. The second pressure chamber 89 is disposed above the decompression chamber 80 and communicates with the tube t5 via the negative pressure supply path 358. The second pressure chamber 89 communicates with the decompression chamber 80 through the communication hole 86. The second pressure chamber 89 is adjacent to the atmospheric chamber 87 with the partition wall portion 88a that is a ceiling portion interposed therebetween. In addition, the partition part 88a has the same structure as the above-mentioned partition part 88b. However, the partition wall portion 88a and the partition wall portion 88b are not in contact with each other and can be independently displaced.

  The second pressure regulating valve 81 is disposed across the second pressure chamber 89 and the decompression chamber 80 and is used to control the supply of negative pressure from the second pressure chamber 89 to the decompression chamber 80. The second pressure regulating valve 81 has the same configuration as the first pressure regulating valve 71 described above. That is, the second pressure regulating valve 81 includes a valve body 82, a pressure adjustment spring 83, a seal member 85, and a support rod 84. The valve body 82 can be displaced between an open position where the second pressure chamber 89 and the decompression chamber 80 are in communication with each other and a sealing position where the second pressure chamber 89 and decompression chamber 80 are not in communication. Is being energized. In the example of FIG. 2 (A), the valve body 82 is disposed at the open position. The seal member 85 seals the communication hole 86 and maintains the negative pressure in the decompression chamber 80 when the valve body 82 is disposed at the sealing position. The support rod 84 has one end joined to the valve body 82 and the other end joined to the partition wall portion 88a.

  The recording head 150 is disposed on the bottom surface of the carriage 100 and ejects ink toward the recording paper P (FIG. 1). The recording head 150 includes a nozzle plate 152 and an ink discharge channel 154. The ink discharge channel 154 communicates with the ink discharge channel 95 of the carriage 100 and guides the ink supplied from the defoaming chamber 92 to the nozzle plate 152. The nozzle plate 152 includes a number of nozzles (not shown).

  The printer 500 described above corresponds to the liquid ejecting apparatus in the claims.

A2. Ink supply operation in the carriage 100:
When ink is ejected from a large number of nozzles (not shown) provided on the nozzle plate 152 shown in FIG. 2A and the ink is consumed, the pressure in the first pressure chamber 77 decreases due to the reduction of the ink. Then, the pressure in the first pressure chamber 77 becomes lower than the pressure (atmospheric pressure) in the atmospheric chamber 87, and the partition wall 88 b is deflected to the inside of the first pressure chamber 77 and displaced downward by this pressure difference. At this time, the valve body 72 is pushed down via the support rod 74. When the urging force of the pressure adjustment spring 73 is overcome and the valve body 72 is positioned at the open position, the ink inlet 76 is opened and the ink flows into the first pressure chamber 77.

  FIG. 2B is a cross-sectional view showing the state of the carriage 100 and the recording head 150 after ink flows into the first pressure chamber 77 from the opened ink inlet 76. When ink flows into the first pressure chamber 77 and the chamber pressure increases, the partition wall portion 88b is displaced upward. Accordingly, when the valve body 72 moves to the sealing position again, the inflow of ink into the first pressure chamber 77 is stopped, and the supply of ink to the recording head 150 is stopped. As described above, the printer 500 is configured such that the consumed amount of ink appropriately flows into the recording head 150 by opening and closing the first pressure regulating valve 71 according to the consumption of ink.

A3. Defoaming action:
The negative pressure generated by the decompression pump 300 (FIG. 1) is supplied to the second pressure chamber 89 via the tube t5 and the negative pressure supply path 358 (FIG. 2A). At this time, the partition wall portion 88a is deflected to the inside of the second pressure chamber 89 and displaced downward by the pressure difference between the pressure in the second pressure chamber 89 (negative pressure) and the pressure in the atmosphere chamber 87 (atmospheric pressure). The valve body 82 is pushed down via the support rod 84. When the valve body 82 is positioned at the open position, the communication hole 86 is opened and negative pressure is supplied to the decompression chamber 80. Then, the pressure in the defoaming chamber 92 becomes lower than the pressure in the defoaming chamber 92, and the bubbles (gas) BL trapped in the ceiling portion of the defoaming chamber 92 are between the decompression chamber 80 and the defoaming chamber 92. The pressure difference passes through the partition wall 90 and flows into the decompression chamber 80.

A4. Detailed configuration of bulkhead plate:
FIG. 3 is a perspective view showing a detailed configuration of the carriage 100. In FIG. 3, for the sake of illustration, only the configuration related to the supply of black ink is shown. The carriage 100 having the above-described configuration (function) has a configuration in which a plurality of thin plate members (hereinafter referred to as “plates”) are stacked in the vertical direction (Y-axis). In these plurality of plates, the shape of the plane perpendicular to the stacking direction (lamination surface: XZ plane) is a rectangle having the same size. In the example of FIG. 3, the partition plate 10 is shown among the plurality of stacked plates, and the other plates are omitted.

  The partition plate 10 includes a partition wall portion 90, a flow path forming portion 52, and a flow path forming portion 66. The flow path forming part 52 is a groove formed on the back surface (the lower surface of the stacked surface) of the partition plate 10, and when the partition plate 10 and a plate (not shown) that contacts the back surface are stacked. Then, a flow path 79a constituting a part of the internal flow path 79 is formed. One end of the flow path forming portion 52 (groove) is connected to the partition wall portion 90, and the other end is connected to the through hole 51 that penetrates the partition wall plate 10. The flow path forming portion 66 is a groove formed on the surface of the partition plate 10, and is formed when the partition plate 10 and a plate (not shown) that abuts on the surface (the upper surface of the stacked surfaces) are stacked. The internal flow path 62 is formed. Note that one end of the flow path forming portion 66 is connected to a flow hole 65 provided on the back surface of the partition plate 10.

  4 is a plan view showing a detailed configuration of the partition plate 10 shown in FIG. In FIG. 4, the structure which looked at the partition plate 10 from the back surface in FIG. 3 is shown. In FIG. 4, unlike FIG. 3, a configuration related to the supply of ink of all colors is shown.

  The partition plate 10 has the same configuration as the black ink described above as a configuration related to the supply of cyan ink. Specifically, a partition wall portion 90c for cyan ink is provided on the left side of the partition wall portion 90 for black ink. Further, the partition plate 10 has a cyan ink channel forming part 52c adjacent to the left of the black ink channel forming part 52 and a cyan ink channel adjacent to the left of the black ink channel forming part 66. Each of the forming portions 66c is provided. The configuration of the partition wall portion 90c is the same as that of the partition wall portion 90. Further, the configuration of the flow path forming unit 52 c is the same as that of the flow path forming unit 52, and the configuration of the flow path forming unit 66 c is the same as that of the flow path forming unit 66. Similarly, the partition plate 10 has a configuration related to the supply of magenta ink (the partition wall portion 90m and the flow path forming portions 52m and 66m) on the left side of the configuration related to the cyan ink supply described above. The configuration related to the supply (the partition wall portion 90y and the flow path forming portions 52y and 66y) is provided on the left side of the configuration related to the supply of magenta ink.

  At the four corners of the partition plate 10, through holes 11a, 11b, 11c, and 11d used for stacking and fastening with other plates (not shown) are arranged.

  Here, all of the four partition walls 90, 90c, 90m, 90y have the same rib shape. Specifically, in the partition wall 90, streak-like concave portions 21 extending in a direction parallel to the X axis and streaky convex portions 22 extending in a direction parallel to the X axis are alternately arranged along the Z axis. Has a planar shape. Since the ink flows into the partition wall portion 90 from the flow path forming portion 52, the concave portion 21 and the convex portion 22 extend in a direction along the ink inflow direction.

  FIG. 5 is a cross-sectional view taken along the line AA in FIG. In FIG. 5, for convenience of explanation, the decompression chamber 80 adjacent above the partition wall 90 and the defoaming chamber 92 adjacent below the partition wall 90 are indicated by broken lines.

  In the partition wall 90, the wall facing the defoaming chamber 92 is uneven, whereas the wall facing the decompression chamber 80 is flat. Therefore, the concave portion 21 is configured to have a smaller thickness in the Y direction than the convex portion 22. Specifically, for example, the thickness of the concave portion 21 in the Y direction can be 0.3 mm, and the thickness of the convex portion 22 can be 0.5 mm.

  The partition plate 10 described above corresponds to a single member in the claims. The wall facing the defoaming chamber 92 in the partition wall 90 is the first wall in the claims, the wall facing the decompression chamber 80 in the partition wall 90 is the second wall in the claims, and the ribs in the partition wall 90. The shapes correspond to the reinforcing shapes in the claims.

A5. Manufacturing process of the carriage 100:
FIG. 6 is a flowchart showing a procedure for manufacturing the carriage 100. When manufacturing the carriage 100 described above, first, a mold for each plate constituting the carriage 100 is manufactured (step S105). Next, in the mold for the partition plate 10, the partition plate 10 is molded by pouring a molding material along the longitudinal direction of the rib shape of the partition portion 90 (step S110).

  In the example of FIG. 4, among the four sides L1 to L4 of the partition plate 10, the center of the upper side L1 of the partition plate 10 (the side parallel to the Z axis close to the flow holes 65, 65c, 65m, 65y) is formed as the gate position Gt1. Mold material is flowing in. For this reason, the molding material flowing in from the gate position Gt1 flows toward the lower side L2 of the partition plate 10. Here, since the partition wall 90 has a rib shape in which the concave portion 21 and the convex portion 22 extend along the X direction, the direction in which the molding material flows in the mold (the direction from the upper side L1 toward the lower side L2 (+ X direction)). ) Is a direction along the longitudinal direction of the rib shape. In addition, as a molding material, in order to ensure the gas permeability in the partition part 90, a polyacetal, a polypropylene, polyphenylene ether etc. can be used, for example.

  After the partition plate 10 is molded, the other plates are similarly molded by flowing the molding material into the mold (step S115). Next, the molded plates are stacked and joined (step S120).

  As described above, in the carriage 100, since the concave portion 21 of the partition wall portion 90 is configured to be thin, the defoaming ability of bubbles in the ink can be improved. In addition, since the wall facing the defoaming chamber 92 in the partition wall 90 is uneven, the strength of the partition wall 90 can be increased compared to the configuration in which the thickness of the partition wall 90 is the same as that of the recess 21, and A large amount of bubbles can be captured by increasing the contact area with the. Since the strength of the partition wall 90 can be increased in this way, the partition wall 90 can be integrally formed as the same plate as other components (flow path forming portions 52 and 66), and the number of parts of the carriage 100 is reduced. be able to. In addition, since a large amount of bubbles can be captured, the defoaming chamber 92 and the decompression chamber 80 can be reduced in size. Further, when the partition plate 10 is molded, the molding material is poured in a direction along the longitudinal direction of the rib shape in the partition wall portion 90, so that the flowability of the molding material inside the mold can be improved. Therefore, since the molding material reaches the portion far from the gate position Gt1 (for example, the portion near the lower side L2 (FIG. 4) of the partition plate 10) through the partition portions 90, 90c, 90m, and 90y, the molding material is filled. Therefore, it is possible to suppress the opening of the partition wall 90. In addition, rib shapes (concave portions 21 and convex portions 22) in the partition portions 90, 90c, 90m, and 90y are formed to extend in a direction along the ink inflow direction. Therefore, in the case of performing preliminary discharge after ink ejection (operation for ejecting ink separately from printing and discharging air bubbles in the ink supply path from the nozzle (not shown)), it is trapped in the ceiling portion of the defoaming chamber 92. The bubbles BL can be moved along the rib shape by the flow of ink, and can be easily discharged from the ink discharge flow path 95.

B. Second embodiment:
FIG. 7 is a plan view showing a detailed configuration of the partition plate 10a in the second embodiment. The carriage as the defoaming mechanism in the second embodiment is different from the carriage 100 (FIGS. 1 to 6) in the configuration of the partition wall portion in the partition plate 10a, and the other configuration and the procedure for manufacturing the carriage are the same as those in the first embodiment. Same as example.

  Specifically, the black ink partition wall portion 90 in the first embodiment has the longitudinal direction of the rib shape in the vertical direction (direction parallel to the X axis), whereas the black ink partition wall portion 90 in the first embodiment has a black shape. In the partition wall 91 for ink, the longitudinal direction of the rib shape is the horizontal direction (direction parallel to the Z axis). In such a configuration, the inflow direction (−X direction) of the ink flowing into the partition wall portion 91 from the flow path forming portion 52 intersects with the longitudinal direction of the rib shape of the partition wall portion 91. The partition portions 91c, 91m, and 91y for the other color inks have the same configuration.

  Here, unlike the gate position Gt1 in the first embodiment, the gate position Gt2 of the molding material in the second embodiment is the center of the right side L3 of the partition plate 10a. In this case, as in the first embodiment, the flow direction of the molding material (the direction from the right side L3 to the left side L4 (+ Z direction)) is along the longitudinal direction of the rib shape in the partition walls 91, 91c, 91m, 91y. It has become a direction.

  The carriage in the second embodiment having such a configuration has the same effect as the carriage 100 in the first embodiment. In addition, the rib shapes in the partition walls 91, 91c, 91m, and 91y are formed so as to extend in a direction crossing the ink inflow direction. Therefore, even when the ink flows into the defoaming chamber 92, the state where the bubbles are captured in the partition portions 91, 91c, 91m, and 91y can be maintained, and the bubbles are prevented from flowing into the recording head 150. Can do.

C. Third embodiment:
FIG. 8 is an explanatory view showing the cross-sectional shape of the partition wall in the third embodiment. The carriage as a defoaming mechanism in the third embodiment is different from the carriage 100 (FIGS. 1 to 6) in the configuration of the partition wall portion in the partition plate, and the other configuration and the procedure of the carriage manufacturing process are the same as those in the first embodiment. Is the same.

  Specifically, the black ink partition wall 90 in the first embodiment has a rib-shaped cross section in which concave portions 21 and convex portions 22 having different thicknesses are alternately arranged. As shown in FIG. 8, the partition wall portion 90a for black ink in this embodiment has a corrugated cross section in which a concave portion and a convex portion having a constant thickness are repeated. The thickness of the partition wall 90a can be the same as the thickness (for example, 0.3 mm) of the recess 21 of the partition wall 90 in the first embodiment. The plan view of the partition plate in the second embodiment is the same as the plan view (FIG. 4) of the partition plate 10a in the first embodiment. That is, it has a streaky planar shape extending in the direction along the X axis. The partition walls (not shown) for the inks of other colors have the same configuration. The corrugated shape described above corresponds to the reinforcing shape in the claims.

  The carriage in the third embodiment having such a configuration has the same effect as the carriage 100 in the first embodiment. Moreover, since the thickness of the partition wall 90a can be reduced at any position, a high defoaming ability can be realized.

D. Fourth embodiment:
FIG. 9 is a plan view showing a detailed configuration of the partition plate 10b in the fourth embodiment. The carriage as the defoaming mechanism in the fourth embodiment is different from the carriage 100 (FIGS. 1 to 6) in the configuration of the partition wall portion in the partition plate 10b, and the other configuration and the procedure for manufacturing the carriage are the same as those in the first embodiment. Same as example.

  Specifically, the black ink partition wall portion 90 in the first embodiment is a rib shape, whereas the black ink partition wall portion 94 in the fourth embodiment is based on the thin portion 23. As shown, a thin cylindrical thick portion 24 has a dot shape arranged in a predetermined interval. The partition portions 94c, 94m, and 94y for the other color inks have the same configuration.

  FIG. 10 is a cross-sectional view showing a BB cross section in FIG. 9. As in FIG. 5, the decompression chamber 80 adjacent above the partition wall portion 94 and the defoaming chamber 92 adjacent below the partition wall portion 94 are indicated by broken lines.

  The cross section of the partition wall portion 94 in the fourth embodiment also has the same shape as the cross section of the partition wall portion 90 in the first embodiment. That is, the wall facing the defoaming chamber 92 has an uneven shape, whereas the wall facing the decompression chamber 80 is flat, and the thin portion 23 is thinner than the thick portion 24. In addition, the thickness of the thin part 23 and the thick part 24 can be 0.3 mm and 0.5 mm similarly to the thickness of the recessed part 21 and the convex part 22 in a 1st Example, for example. The dot shape described above corresponds to the reinforcing shape in the claims.

  The carriage in the fourth embodiment having such a configuration has the same effect as that of the first embodiment.

E. Fifth embodiment:
FIG. 11A is an explanatory diagram schematically showing functions of the carriage 100a and the recording head 150 in the fifth embodiment. FIG. 11A shows the state of the carriage 100a and the recording head 150 after the ink has flowed into the first pressure chamber 77, as in FIG. 2B. The carriage 100a as the defoaming mechanism in the fifth embodiment is different from the carriage 100 (FIGS. 1 to 6) in the following four points, and the other configuration and the procedure for manufacturing the carriage are the same as those in the first embodiment. is there. That is, the carriage 100a does not include the second pressure chamber 89, the partition wall portion 88a, the second pressure regulating valve 81, and the partition wall portion 90, and has a defoaming portion 64a in the middle of the internal flow path 64. The difference is that a decompression chamber 80a is provided instead of the decompression chamber 80, and that the negative pressure supply path 358 is connected to the decompression chamber 80a.

  In the first embodiment, the part for trapping bubbles to perform defoaming (the defoaming chamber 92) is disposed adjacent to the decompression chamber 80, but in the fifth embodiment, such a part is used. (Defoaming part 64a) is arranged in decompression room 80a. In the fifth embodiment, the defoaming chamber 92 is not used for capturing bubbles but is used for temporarily storing ink.

  FIG. 11B is a cross-sectional view illustrating a detailed configuration of the defoaming portion 64a and the decompression chamber 80a illustrated in FIG. The defoaming portion 64a is disposed in the decompression chamber 80a and is used for capturing bubbles in the circulating ink. The defoaming portion 64a has a hollow tube shape and communicates with the defoaming portion 64a. Accordingly, the ink flows through the defoaming portion 64a. The cross-sectional shape of the defoaming portion 64a has a corrugated shape (concave / convex shape) in which the concave portions 25 and the convex portions 26 are alternately arranged, as in the third embodiment. Each of the concave portion 25 and the convex portion 26 has a constant thickness and is made of a gas permeable member.

  In the example of FIG. 11B, the bubbles BL in the circulating ink are captured by the convex portion 26. When negative pressure is supplied to the decompression chamber 80a via the negative pressure supply path 358, the bubbles BL flow into the decompression chamber 80a via the wall surface of the convex portion 26. The defoaming portion 64a corresponds to the defoaming portion in the claims. The corrugated shape in which the concave portions 25 and the convex portions 26 are alternately arranged corresponds to the reinforcing shape in the claims.

  The carriage 100a of the fifth embodiment having such a configuration has the same effect as that of the first embodiment. Moreover, since the defoaming part 64a is provided in the middle of the internal flow path 64, the defoaming chamber 92 can be reduced in size. Further, in the configuration in which ink is supplied by being pressurized by the ink supply pumps 220a to 220d, the pressurized ink flows through the defoaming portion 64a, so the pressure in the defoaming portion 64a and the pressure in the decompression chamber 80a A difference from the pressure is likely to occur. Therefore, a large amount of bubbles can be removed in a short time, or a relatively small pump can be used as the decompression pump 300.

F. Sixth embodiment:
FIG. 12A is an explanatory diagram schematically showing functions of the carriage 100b and the recording head 150 in the sixth embodiment. FIG. 12A shows the state of the carriage 100b and the recording head 150 after ink has flowed into the first pressure chamber 77, as in FIG. 2B. The carriage 100b as the defoaming mechanism in the sixth embodiment is provided with a pressure reducing pipe 140 in place of the second pressure chamber 89, the second pressure regulating valve 81, and the pressure reducing chamber 80 (see FIG. 1). Unlike (6) to (6), the other configuration and the procedure of the carriage manufacturing process are the same as those in the first embodiment.

  In the first embodiment, the room to be decompressed (decompression chamber 80) is disposed adjacent to the defoaming chamber 92, but in the sixth embodiment, such a room (decompression pipe 140) is defoamed. It is disposed in the chamber 92.

  FIG. 12B is a cross-sectional view illustrating a detailed configuration of the decompression tube 140 and the defoaming chamber 92 illustrated in FIG. The decompression tube 140 is disposed above the filter 93 in the defoaming chamber 92. The function of the decompression tube 140 is the same as that of the decompression chamber 80 of the first embodiment. The decompression tube 140 has a cylindrical shape, and is connected to the tube t5 through a negative pressure supply path 358. The wall of the decompression tube 140 is gas permeable. Further, the inner wall of the decompression tube 140 is flat, and the outer wall is uneven. Therefore, the cross section of the wall of the pressure reducing tube 140 has a rib shape as in the first embodiment. Specifically, the outer wall of the decompression tube 140 has a shape in which thick portions 27 and thin portions 28 extending in the circumferential direction are alternately arranged. Therefore, the cross section of the decompression tube 140 is a rib shape as in the first embodiment, and the thin portion 28 is configured to be thinner than the thick portion 27. In addition, the thickness of the thin part 28 and the thick part 27 can be made the same with the thickness of the recessed part 21 and the convex part 22 in a 1st Example. The decompression tube 140 corresponds to the decompression chamber in the claims. The uneven shape on the outer wall of the decompression tube 140 corresponds to the reinforcing shape in the claims.

  The carriage 100b of the sixth embodiment having such a configuration has the same effect as that of the first embodiment. Further, since the decompression tube 140 is disposed inside the defoaming chamber 92, the decompression chamber 80 and the atmospheric chamber 87 are not necessary, and the carriage 100b can be downsized.

G. Variation:
In addition, elements other than the elements claimed in the independent claims among the constituent elements in each of the above embodiments are additional elements and can be omitted as appropriate. The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

G1. Modification 1:
In the first embodiment described above, the partition wall 90 is integrally formed between the decompression chamber 80 and the defoaming chamber 92. Instead, the bottom surface of the decompression chamber 80 and the defoaming chamber 92 are replaced with each other. The ceiling surface may be formed as a separate wall having gas permeability, and may be configured to contact each other when a plurality of plates are stacked. Even in such a configuration, the shape of one of the bottom surface of the decompression chamber 80 and the ceiling surface of the defoaming chamber 92 is a rib shape, so that the decompression chamber 80 and the defoaming chamber 92 The strength between can be increased. In addition, it can be set as the same structure also in the 2nd-4th Example. That is, in general, at least one of a wall that is gas permeable and is in contact with the defoaming chamber 92 in the decompression chamber 80 and a wall that is gas permeable and is in contact with the decompression chamber 80 in the defoaming chamber 92 is a rib shape. Any configuration that is can be employed in the defoaming mechanism of the present invention.

  In this way, when the bottom surface of the decompression chamber 80 and the ceiling surface of the defoaming chamber 92 are formed as separate walls having gas permeability, the procedure for manufacturing the carriage is, for example, as follows: Can be. That is, a mold for the member of the defoaming chamber 92 and a mold for the member of the decompression chamber 80 are prepared, and the member of the defoaming chamber 92 and the member of the decompression chamber 80 are formed using the respective molds. At this time, a molding material in which the bottom surface of the decompression chamber 80 and the ceiling surface of the defoaming chamber 92 have gas permeability is used as the molding material. Further, a mold is used in which at least one of the bottom surface of the decompression chamber 80 or the ceiling surface of the defoaming chamber 92 has a rib shape. In the mold, the molding material is poured in a direction along the longitudinal direction of the rib shape. Next, the member of the decompression chamber 80 and the member of the defoaming chamber 92 are joined so that the decompression chamber 80 and the defoaming chamber 92 are in contact with each other via the bottom surface of the decompression chamber 80 and the ceiling surface of the defoaming chamber 92. .

G2. Modification 2:
In the above-described fourth embodiment, the thick portion 24 has a thin columnar shape, but may be a thin quadrangular column shape instead. Moreover, although this thick part 24 was arrange | positioned along with the predetermined space | interval, it can replace with this and can also arrange | position at random. Moreover, it can also be set as the shape by which the thin part 23 was arrange | positioned along with the predetermined space | interval on the basis of the thick part 24, or was arrange | positioned at random. That is, generally, a dot shape in which thick portions or thin portions are scattered can be employed as the shape of the partition wall in the defoaming mechanism of the present invention.

  In the third embodiment described above, the concave portion and the convex portion forming the corrugated shape in the cross section of the partition wall portion 90a were each bent at 90 degrees, but instead of this, there is no acute angle portion. It can also be R-shaped.

  In the first to fourth embodiments described above, the shape of the partition wall is a rib shape (first and second embodiments), a corrugated shape (third embodiment), and a dot shape (fourth embodiment). )Met. The present invention is not limited to these shapes, and any shape that can increase the strength can be employed for the partition wall in the defoaming mechanism of the present invention. For example, it can also be set as the shape by which the lattice-shaped thick part was arrange | positioned on the basis of a thin part. Moreover, it can also be set as the shape which combined these shapes. Specifically, the upper half of the partition wall can be a rib shape and the lower half can be a dot shape. That is, in general, any reinforcing shape can be adopted as the shape of the partition wall in the present invention.

G3. Modification 3:
In the third embodiment described above, the planar shape of the partition wall 90a is the same as that of the first embodiment. Instead, however, the longitudinal direction is the lateral direction (Z) as in the second embodiment. It is also possible to have a shape that becomes a direction parallel to the axis. In the second embodiment described above, the rib-shaped longitudinal direction (direction parallel to the Z axis) of the partition walls 91, 91c, 91m, and 91y is perpendicular to the ink inflow direction (direction parallel to the X axis). However, instead of this, it may be a direction intersecting with the inflow direction of ink at an arbitrary angle. That is, in general, a configuration in which the longitudinal direction of the shape of the partition wall and the inflow direction of the liquid in the defoaming chamber intersect at an arbitrary angle can be employed in the defoaming mechanism of the present invention.

G4. Modification 4:
In the first embodiment described above, when the partition plate 10 is molded (FIG. 6: Step S110), the gate position of the molding material is the center of the upper side L1 (FIG. 4) of the partition plate 10. It can replace with and can also be set as the other position on the upper side L1. Even in this case, the flow direction of the molding material is substantially the + X direction, and can be a direction along the longitudinal direction of the rib shape in the partition wall portions 90, 90c, 90m, and 90y. Moreover, it can replace with upper side L1 and can provide a gate position in the other sides L2-L4. In addition, when the gate position is provided on the right side L3 or the left side L4, by flowing the forming member from above the right side L3 or the left side L4 (for example, a position having the same height as the flow holes 65 and 65y), The flow direction when the molding material flows through the portions corresponding to the partition wall portions 90, 90c, 90m, and 90y can be set substantially to the + X direction.

G5. Modification 5:
In the fifth embodiment described above, the depressurization chamber is not provided adjacent to the defoaming chamber 92, but instead, the defoaming is performed via the partition wall 90 as in the first embodiment. A decompression chamber 80 adjacent to the chamber 92 may be provided. By doing in this way, since the air bubbles trapped in the defoaming chamber 92 can be removed, a larger amount of air bubbles can be removed compared to the configuration in which defoaming is performed only in the defoaming portion 64a. Similarly, in the sixth embodiment, a decompression chamber adjacent to the defoaming chamber 92 may be provided.

G6. Modification 6:
In each of the above-described embodiments, the type of ink ejected by the printer 500 is four colors. However, instead of this, any type of ink can be ejected. The printer of each embodiment is an off-carriage type printer, but instead of this, a so-called on-carriage type printer in which an ink cartridge is mounted on a carriage can be adopted.

G7. Modification 7:
In each of the above-described embodiments, the example in which the defoaming mechanism is applied to the carriages 100, 100a, and 100b has been described. However, instead of this, the defoaming mechanism can be configured separately from the carriage. For example, in each embodiment, the defoaming mechanism can be configured by providing a defoaming chamber and a decompression chamber in the middle of the tubes t11 to t14. Even in such a configuration, at least one of a wall that has gas permeability and contacts the decompression chamber in the defoaming chamber and a wall that has gas permeability and contacts the defoaming chamber in the decompression chamber has a reinforcing shape. Thus, the strength of the defoaming mechanism can be increased.

G8. Modification 8:
In the fifth embodiment described above, the cross section of the defoaming portion 64a has a corrugated shape in which the concave portions 25 and the convex portions 26 are alternately arranged. It can also be a rib shape as in the example or a dot shape as in the fourth embodiment. In the sixth embodiment, the cross section of the wall of the pressure reducing tube 140 has a rib shape. However, instead of this, it may be a wave shape as in the third embodiment.

G9. Modification 9:
In each of the above-described embodiments, the ink jet printer has been described. However, the present invention is not limited to this, and can be applied to any liquid ejecting apparatus that ejects liquid other than ink. For example, electrodes such as image recording devices such as facsimile machines, color material ejection heads used in the manufacture of color filters such as liquid crystal displays, organic EL (Electro Luminescence) displays, and surface emission displays (Field Emission Displays, FEDs) Electrode material injection device used for forming, liquid injection device for injecting liquid containing bio-organic matter used for biochip manufacturing, sample injection device as a precision pipette, lubricating oil injection device, resin liquid injection device Etc. In addition, transparent resin liquids such as UV curable resin to form liquid injection devices that pinpoint lubricant oil onto precision machines such as watches and cameras, and micro hemispherical lenses (optical lenses) used in optical communication elements. A liquid ejecting apparatus that ejects a liquid onto the substrate or a liquid ejecting apparatus that ejects an etching solution such as an acid or an alkali to etch the substrate may be employed. The present invention can be applied to any one of the various liquid ejecting apparatuses including a liquid ejecting head that ejects a minute amount of liquid droplets.

  In addition, a droplet means the state of the liquid discharged from the said liquid ejecting apparatus, and shall also include what pulls a tail in granular shape, tear shape, and thread shape. The liquid here may be any material that can be ejected by the liquid ejecting apparatus. For example, it may be in the state when the substance is in a liquid phase, and may be in a liquid state with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts) ) And a liquid as one state of the substance, as well as particles in which functional material particles made of solid materials such as pigments and metal particles are dissolved, dispersed or mixed in a solvent. In addition, typical examples of the liquid include ink and liquid crystal as described in the above embodiments. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot-melt inks.

It is explanatory drawing which shows schematic structure of the printer 500 provided with the carriage 100 as a defoaming mechanism of this invention. FIG. 6 is an explanatory diagram showing the state of the carriage 100 and the recording head 150 during ink ejection, and a cross-sectional view showing the state of the carriage 100 and the recording head 150 after ink flows into the first pressure chamber 77 from the opened ink inlet 76. is there. 2 is a perspective view illustrating a detailed configuration of a carriage 100. FIG. It is a top view which shows the detailed structure of the partition plate 10 shown in FIG. It is sectional drawing which shows the AA cross section in FIG. 4 is a flowchart showing a procedure for manufacturing a carriage. It is a top view which shows the detailed structure of the partition plate 10a in a 2nd Example. It is explanatory drawing which shows the cross-sectional shape of the partition part in a 3rd Example. It is a top view which shows the detailed structure of the partition plate 10b in a 4th Example. It is sectional drawing which shows the BB cross section in FIG. It is explanatory drawing which shows typically the function of the carriage 100a and the recording head 150 in 5th Example, and sectional drawing which shows the detailed structure of the defoaming part 64a and the pressure reduction chamber 80a. It is explanatory drawing which shows typically the function of the carriage 100b in the 6th Example, and the recording head 150, and sectional drawing which shows the detailed structure of the pressure reduction pipe | tube 140 and the defoaming chamber 92.

Explanation of symbols

    500 ... Printer, IC1 to IC4 ... Ink cartridge, t1 to t5, t11 to t14 ... Tube, 100, 100a, 100b ... Carriage, 150 ... Recording head, 220a-220d ... Ink supply pump, 260 ... Guide rod, 270 ... Platen, 300 ... Pump for decompression, P ... Recording paper, 10, 10a, 10b ... Partition plate, 11a ... Through hole, 21 ... Recess, 22 ... Convex, 23 ... Thin part, 24 ... Thick part, 25 ... Concave , 26 ... convex part, 27 ... thick part, 28 ... thin part, 51 ... through hole, 52 ... flow path forming part, 52 c ... flow path forming part, 60 ... filter chamber, 61 ... filter, 62 ... internal flow path 64 ... Internal flow path, 64a ... Defoaming part, 65 ... Flow hole, 66 ... Channel formation part, 66c ... Channel formation part, 66m ... Channel formation part, 66y ... Channel formation part, 70 ... Valve chamber , DESCRIPTION OF SYMBOLS 1 ... 1st pressure regulation valve, 72 ... Valve body, 73 ... Pressure adjustment spring, 74 ... Support rod, 75 ... Seal member, 76 ... Ink inlet, 77 ... 1st pressure chamber, 79 ... Internal flow path, 79a ... Flow path, 80 ... decompression chamber, 80a ... decompression chamber, 81 ... second pressure regulating valve, 81 ... atmospheric pressure valve, 82 ... valve body, 83 ... pressure adjusting spring, 84 ... support rod, 85 ... seal member, 86 ... communication Hole 87: Atmospheric chamber 88a ... Partition portion 88b ... Partition portion 89 ... Second pressure chamber 90, 90a, 91a to 91y, 94a to 94y ... Partition portion 92 ... Defoaming chamber 93 ... Filter 95 Ink discharge passage, 99 ... Air communication hole, 140 ... Pressure reducing pipe, 152 ... Nozzle plate, 154 ... Ink discharge passage, 358 ... Negative pressure supply passage, L1 ... Upper side, L2 ... Lower side, L3 ... Right side, L4 ... Left side, BL ... Bubble, Gt1, Gt2 ... Gate position

Claims (6)

A defoaming mechanism for removing bubbles from a liquid flowing in the liquid ejecting apparatus,
A defoaming chamber for trapping bubbles in the liquid;
A decompression chamber;
A partition wall portion interposed between the defoaming chamber and the decompression chamber, in contact with the defoaming chamber and the decompression chamber, and having gas permeability,
With
The defoaming mechanism is composed of a plurality of plates formed and laminated as a single member,
The partition wall is formed on one of the plurality of plates,
The surface facing the defoaming chamber of the partition wall is a defoaming mechanism having a reinforcing shape having a concave portion and a convex portion. The defoaming mechanism according to claim 1,
The reinforcing shape includes a rib shape having a cross section in which thick portions and thin portions are alternately arranged, a corrugated shape in which the cross section is corrugated and a plane is a streak, and a thick portion or thin portion is A defoaming mechanism that is one of scattered dot shapes. The defoaming mechanism according to claim 2,
The reinforcing shape is the rib shape or the wave shape,
A defoaming mechanism in which the longitudinal direction of the rib shape or the streak direction of the wave shape intersects the inflow direction of the liquid in the defoaming chamber. In the defoaming mechanism according to claim 2 or 3,
The planar shape of the single member is a rectangle,
The reinforcing shape is the rib shape or the wave shape,
The longitudinal direction of the rib shape or the streak direction of the corrugated shape and the direction from the side having the inflow position of the molding material when molding the single member to the opposite side in the rectangle are parallel to each other. Defoaming mechanism. A liquid ejecting apparatus comprising the defoaming mechanism according to any one of claims 1 to 4 . A method for producing a defoaming mechanism for removing bubbles from a liquid circulating in a liquid ejecting apparatus,
(A) forming a member constituting a defoaming chamber for capturing bubbles in the liquid;
(B) forming a member constituting a decompression chamber for decompressing the defoaming chamber;
(C) forming a partition member constituting the partition wall having gas permeability;
(D) joining the member of the defoaming chamber and the member of the decompression chamber so that the defoaming chamber and the decompression chamber are in contact with each other via the partition member;
With
The step (c)
(E) along the longitudinal direction of the rib shape having a cross section in which the thick wall portion and the thin wall portion are alternately arranged, or along the streak direction of the corrugated shape having a corrugated cross section and a flat surface. A method for producing a defoaming mechanism, comprising a step of casting a mold material and molding the partition member.

Images