Ink container manufacturing method

Abstract

To provide a manufacturing method of an ink container capable of manufacturing the ink container with a small number of components and less man hours.SOLUTION: A manufacturing method of an ink container includes an ink storage part and an ink supply port communicating with the ink storage part. The method includes: a discharge step of, when a discharge direction of a parison is a Z-axis direction, one direction orthogonal to the Z-axis direction is an X-axis direction, and a direction orthogonal to the Z-axis direction and the X-axis direction is a Y-axis direction, discharging the parison in the Z-axis direction; a placing-in-mold step of forming a molding die by a first die and a second die being a pair with the first die, the molding die having a molding part having a length in the X-axis direction longer than a length in the Z-axis direction, and sandwiching the parison from both sides of the Y-axis direction by the first die and the second die; and a molding step of inserting a blow nozzle to an air blowing port of the molding die, blowing air, and molding the ink storage part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing an ink container. [Background technology]

[0002] For example, Patent Document 1 discloses the configuration of a liquid storage container. According to this document, the base, front cover, and rear cover that make up the cartridge case of the ink cartridge are each formed by injection molding, and the respective parts are fastened together by screwing, snap fitting, welding, adhesive, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-51321 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the liquid storage container of Patent Document 1 has multiple parts formed by injection molding and fastened together using various fastening means, which results in a large number of parts and manufacturing steps, making parts management complicated, and the large number of manufacturing steps requires a lot of labor and time. In other words, there has been a demand for a method of manufacturing an ink container that can be manufactured using a small number of parts and with a small number of steps. [Means for solving the problem]

[0005] A manufacturing method of an ink container according to one aspect of the present application is a manufacturing method of an ink container having an ink storage section and an ink supply port communicating with the ink storage section, and includes: an ejection step of ejecting the parison in the Z-axis direction, where the ejection direction of the parison is defined as a Z-axis direction, a direction perpendicular to the Z-axis direction is defined as an X-axis direction, and a direction perpendicular to the Z-axis direction and the X-axis direction is defined as a Y-axis direction; a molding step of forming a molding die using a first die and a second die that is paired with the first die, the molding die having a molding section whose length in the X-axis direction is greater than its length in the Z-axis direction, the first die and the second die sandwiching the parison from both sides in the Y-axis direction; and a molding step of inserting a blow nozzle into an air inlet of the molding die and blowing air to mold the ink storage section. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 2 is a perspective view of an ink container according to the first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along the line bb in FIG. 1 . [Figure 3] FIG. 4 is a flowchart showing the flow of a manufacturing method of an ink container. [Figure 4] Schematic diagram of the molding device. [Figure 5] Cross section of a parison. [Figure 6] An explanatory diagram of the molding process. [Figure 7] An explanatory diagram of the molding process. [Figure 8] Enlarged view of the cc cross section in Figure 1. [Figure 9] FIG. [Figure 10] FIG. 10 is a perspective view showing the configuration of a recording apparatus according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] Embodiment 1 ***Ink container configuration*** Fig. 1 is a perspective view of an ink container according to embodiment 1. Fig. 2 is a cross-sectional view taken along line bb in Fig. 1. The configuration of an ink container 10 according to this embodiment will be described with reference to FIGS. 1 and 2. Each figure illustrates three mutually perpendicular axes: an X axis, a Y axis, and a Z axis. In this embodiment, the direction in which the long side of the rectangular parallelepiped ink container 10 extends is the X-positive direction. The direction along the X-axis is referred to as the "X-axis direction," the direction along the Y-axis as the "Y-axis direction," and the direction along the Z-axis as the "Z-axis direction." For example, the Y-axis direction refers to both the positive and negative Y-axis directions. In addition, to facilitate understanding of the description, the following figures may be depicted with dimensions and scales that differ from the actual dimensions.

[0008] The ink container 10 is a storage container that supplies ink to the recording head of an inkjet recording device such as an inkjet printer, and is also called an ink cartridge. The ink stored in the ink container 10 is not limited to what is called ink, but may be anything that becomes liquid when ejected from the recording head, including, for example, DNA samples, resists, and pattern materials. When applied to an inkjet printer, ink of each color, such as black ink, yellow ink, magenta ink, and cyan ink, is stored in the ink container 10 one by one.

[0009] The ink container 10 shown in FIG. 1 is integrally constructed by blow molding, and includes a container body 1 which is the container body, a supply port 2 which is an ink supply port, and the like. The container 1 has a storage section 3 which is a space for storing ink inside. The container 1 including the storage section 3 is called an ink container. The surface on the negative Z side of the container 1 is called an upper surface 1a, the surface on the negative Y side that intersects with the upper surface 1a is called a side surface 1b, the surface opposite the side surface 1b is called a side surface 1c, and the surface opposite the upper surface 1a is called a lower surface 1d. The supply port 2 is an ink supply port and is provided on the top surface 1a of the container 1. The supply port 2 is in communication with the storage section 3 of the container 1. The supply port 2 is provided at a position offset in the positive X direction from the center of the X-axis dimension of the container 1, and protrudes cylindrically from the top surface 1a in the negative Z direction.

[0010] As shown in FIG. 1, the side surface 1b of the container 1 is substantially rectangular, with an inclined portion provided on the short side on the supply port 2 side. Four recesses 4a to 4b are formed on the side surface 1b along the long side. The four recesses 4a to 4b are collectively referred to as recesses 4. Four recesses 4a to 4b are also formed on the side surface 1c, similar to the side surface 1b. The recesses 4 function to suppress deformation of the wall including the sides 1b and 1c. The number of recesses 4 is not limited to four, but may be any number, and may be set appropriately depending on the size of the container 1.

[0011] FIG. 2 is a cross-sectional view of recess 4b of container 1. As shown in FIG. 2, recess 4b on side 1b is a truncated cone-shaped recess, and its upper surface forms connecting wall 5b. Similarly, recess 4b on side 1c is also a truncated cone-shaped recess, and its upper surface forms connecting wall 5b. In other words, recess 4b on side 1b and recess 4b on side 1c share connecting wall 5b and are connected to each other. Note that recesses 4a, 4c, and 4d have the same configuration as recess 4b, and recess 4 on side 1b and recess 4 on side 1c share connecting wall 5 and are connected to each other. With this configuration, even when negative pressure occurs inside storage section 3, the distance between side 1b and side 1c is maintained, and a predetermined capacity can be secured.

[0012] In FIG. 2, a mold 20 used for blow molding is shown by a dotted line. The molding die 20 is composed of a first die 21 that forms the portion on the negative Y side, including the side surface 1b of the ink container 10, and a second die 22 that forms the portion on the positive Y side, including the side surface 1c of the ink container 10. The dividing line PL is the dividing position between the first die 21 and the second die 22. The dividing line PL is the parting line. The cavity portion of the molding die 20 is also called the molding portion 23. 2, recess 4b on side surface 1b of housing 1 is formed by a protrusion that protrudes in the positive Y direction of first mold 21. Similarly, recess 4b on side surface 1c is formed by a protrusion that protrudes in the negative Y direction of second mold 22. In other words, multiple recesses 4 arranged along the X-axis direction are formed in housing 1 on side surfaces 1b and 1c facing the Y-axis direction by the protrusions of molding mold 20 that protrude in the Y-axis direction. As shown in FIG. 1, the ink container 10 molded by the molding portion 23 of the mold 20 has a horizontally elongated shape in which the length in the X-axis direction is greater than the length in the Z-axis direction. In other words, the mold 20 is formed by a first mold 21 and a second mold 22 that pairs with the first mold 21, and the mold 20 has a molding portion 23 in which the length in the X-axis direction is greater than the length in the Z-axis direction. The recess 4 may be a hole recessed in the Y-axis direction from the side surfaces 1b and 1c. The recess 4b shown in FIG. 2 has a tapered cross-section, but may also have a linear surface in the Y-axis direction and is not limited to this. The bottom of the recess 4 is shown in FIG. 2 as a vertical plane extending in the Z-axis direction, but is not limited to this.

[0013] ***Ink container manufacturing method*** Fig. 3 is a flow chart showing the flow of the manufacturing method of an ink container. Fig. 4 is a schematic diagram of a molding device. Fig. 5 is a cross-sectional view of a parison. Fig. 6 is an explanatory diagram of the molding process. Fig. 7 is an explanatory diagram of the molding process. Fig. 8 is an enlarged view of the cc cross section of Fig. 1. Fig. 9 is an explanatory diagram of the deburring process. Here, we will explain the method for manufacturing the ink container 10. First, we will explain the general configuration of the molding device 100 using FIG.

[0014] 4 is a molding apparatus for blow molding, and is made up of a plasticizing unit 50, an extrusion unit 51, etc. Three work areas Wa1 to Wa3 are provided in the positive Z direction of molding apparatus 100. Molding mold 20 is provided so as to be movable in the X-axis direction among the three work areas Wa1 to Wa3. The plasticizing device 50 is configured to include a hopper, an extrusion screw, and the like (not shown), and plasticizes the thermoplastic resin pellets stored in the hopper and supplies them to the extrusion section 51. As the thermoplastic resin, for example, PP (polypropylene) resin for blow molding is used. However, the thermoplastic resin is not limited to PP resin, and any engineering plastic for blow molding may be used.

[0015] The extrusion section 51 is configured to include an extrusion die 52, a cutter 53, etc., and extrudes the plasticized material supplied from the plasticizing device 50 through the extrusion die 52 in the Z plus direction. 5 is a view of the parison 7 as seen from the Z-positive direction, and is a cross-sectional view of the parison 7 in a plane including the X-axis and Y-axis. As shown in FIG. 5, the cross section of the parison 7 has an elliptical shape with its major axis along the X-axis direction. The width of the ellipse in the major axis direction is defined as width 7w. Next, the flow of the manufacturing method of the ink container 10 will be described with reference to FIG.

[0016] In step S10, the parison 7 is molded by the molding device 100. More specifically, the plasticized material supplied from the plasticizing device 50 is extruded by the extrusion unit 51 in the positive Z direction.

[0017] In step S11, as shown in FIG. 4, the cylindrical parison 7 is discharged in the positive Z direction from the extrusion section 51. This step is the discharging step. When a predetermined length of the parison 7 has been discharged from the extrusion section 51, the molding die 20 moves to the working area Wa3. At this time, the first die 21 and the second die 22 (FIG. 6) are spaced apart in the Y-axis direction. In other words, if the discharge direction of the parison 7 is the Z-axis direction, the direction perpendicular to the Z-axis direction is the X-axis direction, and the direction perpendicular to the Z-axis direction and the X-axis direction is the Y-axis direction, during the discharge process, the parison 7 is discharged in the Z-axis direction.

[0018] In step S12, as shown in Fig. 6, the parison 7 is sandwiched between the first mold 21 and the second mold 22 from both sides in the Y-axis direction. This process is the molding process, in which the first mold 21 and the second mold 22 are clamped together, and the parison 7 with a space therein is set in the molding section 23 of the molding mold 20. In other words, in the molding process, the parison 7 is sandwiched between the first mold 21 and the second mold 22 from both sides in the Y-axis direction. 6, the width 7w of the parison 7 is set to be larger than the arrangement width 14 of the four recesses 4 in the molding section 23. As a result, while both end portions of the parison 7 in the X-axis direction are stretched and made thinner than the arrangement portions of the four recesses 4 during molding, the arrangement portions of the four recesses 4 are more likely to be thicker than the end portions, thereby ensuring the strength of the arrangement portions of the four recesses 4. In other words, in the container 1, a plurality of recesses 4 arranged along the X-axis direction are formed on the side surfaces 1b and 1c facing the Y-axis direction by the protrusions of the molding die 20 that protrude in the Y-axis direction, and the width 7w of the parison 7 in the X-axis direction is larger than the arrangement width 14 as the arrangement range of the plurality of recesses 4.

[0019] In step S13, the cutter 53 cuts the parison 7 between the extrusion section 51 and the mold 20. More specifically, as shown in Fig. 6, the cutter 53, which is a hot cutter, moves from the Y minus direction to the Y plus direction of the parison 7, thereby cutting the parison 7 at a position above the mold 20. Once the parison 7 has been cut, the mold 20 moves to the work area Wa2.

[0020] In step S14, blow nozzle 25 is inserted into mold 20 in work area Wa2. More specifically, as shown in FIG. 7, metal blow nozzle 25 is inserted into air inlet 20b of mold 20. Blow nozzle 25 includes nozzle 25b with a conical portion at its tip and flange 25c, which is a cylindrical portion thicker than nozzle 25b. Nozzle 25b is provided with a plurality of air release holes (not shown).

[0021] In step S15, air is blown into the molding section 23 of the mold 20 from the blow nozzle 25 to mold the ink container 10. This process is the molding process, in which air is injected into the parison 7 in the molding section 23, and the expanded resin adheres to the wall surfaces within the molding section 23, forming the outer shape of the ink container 10. In a preferred example, the parison 7 is stretched until its width 7w is in the range of 1.1 to 2 times its original width. At this time, the thin-walled portions at both ends of the parison 7 in the X-axis direction have a thickness of 10% to 40% of the initial thickness of the parison 7. In other words, in the molding process, the blow nozzle 25 is inserted into the air blowing port 20b, and air is blown in to mold the container 1.

[0022] Figure 8 is an enlarged view of the area around supply port 2 during the molding process, corresponding to the cc cross section in Figure 1. As shown in Figure 8, a blow nozzle 25 is inserted into air blowing port 20b of molding die 20 during the molding process, so the inner surface of supply port 2 is molded to fit the outer shape of blow nozzle 25. More specifically, the inner surface of supply port 2 has a two-stage structure consisting of a guide hole 2c that opens at the top of supply port 2 and a communication hole 2b formed in the center of the bottom surface of guide hole 2c. Communication hole 2b connects guide hole 2c with reservoir 3. As shown in FIG. 8, the communication hole 2b is formed by the outer shape of the nozzle 25b, and the guide hole 2c is formed by the outer shape of the flange portion 25c. This allows the inner circumferential surface of the supply port 2, including the communication hole 2b and the guide hole 2c, to be formed smoothly and with high precision. The outer shape of the supply port 2 is also formed with high precision along the molding portion 23. In other words, in the molding process, the blow nozzle 25 is pressed against the resin of the air blowing port 20b to mold the inner circumferential surface of the supply port 2 as an ink supply port. Once molding is complete, the molding die 20 is moved to the work area Wa1.

[0023] In step S16, burrs 91 on the upper surface 1a of the ink container 10 and burrs 92 on the lower surface 1d are removed. In other words, if the discharge direction of the parison 7 in the Z-axis direction is defined as the positive Z direction and the direction opposite to the positive Z direction is defined as the negative Z direction, burrs 92 on the positive Z direction side and burrs 91 on the negative Z direction side of the molded product are removed. Specifically, when the molding mold 20 moves to the work area Wa1, the mold is opened and the ink container 10 with the burrs attached is removed. From the removed ink container 10, burrs 91 occurring along the parting line PL (FIG. 1) on the upper surface 1a and burrs 92 occurring along the parting line PL on the lower surface 1d are removed using a dedicated jig (not shown). This completes the ink container 10 shown in FIG. 1. In other words, after the molding process, a deburring process is performed to remove burrs 92 on the positive Z direction side and burrs 91 on the negative Z direction side of the molded product. In the deburring process, burrs are removed from the portion excluding the supply port 2. That is, the supply port 2 can be molded without burrs by the blow nozzle 25 and the molding die 20. After the mold is opened, the molding die 20 is moved again to the work area Wa3, and the processes from step S12 onwards are repeated.

[0024] As described above, the manufacturing method of the ink container 10 of this embodiment can provide the following effects. The method for manufacturing an ink container 10 is a method for manufacturing an ink container 10 having a container 1 as an ink storage section and a supply port 2 as an ink supply port that communicates with a storage section 3 of the container 1, and includes: a discharging step in which the parison 7 is discharged in the Z-axis direction, where the discharge direction of the parison 7 is the Z-axis direction, one direction perpendicular to the Z-axis direction is the X-axis direction, and the direction perpendicular to the Z-axis direction and the X-axis direction is the Y-axis direction; a molding step in which a molding die 20 is formed using a first die 21 and a second die 22 that is paired with the first die 21, the molding die 20 having a molding section 23 whose length in the X-axis direction is longer than its length in the Z-axis direction, and the first die 21 and the second die 22 sandwich the parison 7 from both sides in the Y-axis direction; and a molding step in which a blow nozzle 25 is inserted into an air blowing port 20b of the molding die 20 and air is blown in to mold the container 1.

[0025] This allows the ink container 10, which is elongated in the X-axis direction, to be manufactured by blow molding using one member and in fewer steps. Therefore, it is possible to provide a manufacturing method for the ink container 10 that can manufacture the ink container 10 with a small number of parts and a small number of steps. Furthermore, unlike conventional liquid containers that require multiple parts and many manufacturing steps, which results in high costs, the manufacturing method of this embodiment allows for manufacturing using a single part by blow molding with fewer manufacturing steps, thereby providing a low-cost ink container 10. Furthermore, the ink container 10 has a simple configuration yet has the same functions as conventional liquid containers.

[0026] In the molding process, the blow nozzle 25 is pressed against the resin of the air blowing port 20b to mold the inner circumferential surface of the supply port 2 as an ink supply port. This allows the supply port 2 to be formed at the same time as the container 1 is molded by blowing air, so the ink container 10 can be formed with fewer manufacturing steps. Furthermore, since the blow nozzle 25 is pressed against the container to mold it, the inner circumferential surface of the supply port 2 can be formed accurately and smoothly.

[0027] In addition, the container 1 has a plurality of recesses 4 arranged along the X-axis direction on the side surfaces 1b and 1c facing the Y-axis direction formed by protrusions on the molding die 20 that protrude in the Y-axis direction, and the parison 7 has a width 7w in the X-axis direction that is greater than the arrangement width 14, which is the arrangement range of the plurality of recesses 4. As a result, the end portions of the parison 7 in the X-axis direction are stretched and become thinner than the areas where the four recesses 4 are located during molding, whereas the areas where the four recesses 4 are located are more easily thick than the end portions, thereby ensuring the strength of the areas where the four recesses 4 are located.

[0028] After the molding step, a deburring step is performed to remove burrs 91, 92 on the top and bottom of the molded product in the Z-axis direction. In the deburring step, burrs are removed from the portion excluding the supply port 2. According to this, the supply port 2 can be molded by the blow nozzle 25 and the molding die 20 without generating any flash.

[0029] The method for manufacturing an ink container 10 is a method for manufacturing an ink container 10 having a container 1 as an ink storage section and a supply port 2 as an ink supply port that communicates with a storage section 3 of the container 1, and includes: a discharge step in which the parison 7 is discharged in the Z-axis direction, where the discharge direction of the parison 7 is the Z-axis direction, one direction perpendicular to the Z-axis direction is the X-axis direction, and a direction perpendicular to the Z-axis direction and the X-axis direction is the Y-axis direction; and a molding step in which a molding die 20 is formed using a first die 21 and a second die 22 that is paired with the first die 21, and the first die 21 and the second die 22 sandwich the parison 7 from both sides in the Y-axis direction, and in the molding step, a blow nozzle 25 is pressed against the resin of an air inlet 20b to mold the inner surface of the supply port 2 as an ink supply port.

[0030] This allows the supply port 2 to be formed at the same time as the container 1 is molded by blowing air, so the ink container 10 can be formed with fewer manufacturing steps. Furthermore, since the blow nozzle 25 is pressed against the container to mold it, the inner circumferential surface of the supply port 2 can be formed accurately and smoothly. Therefore, it is possible to provide a manufacturing method for the ink container 10 that can manufacture the ink container 10 with a small number of parts and a small number of steps.

[0031] Embodiment 2 ***Recording Device*** FIG. 10 is a perspective view showing the configuration of a recording apparatus according to the second embodiment. 10, a recording apparatus 200 of this embodiment includes the ink container 10 of the above embodiment as an ink cartridge. Hereinafter, the same parts as those in the above embodiment will be assigned the same numbers, and duplicated explanations will be omitted.

[0032] The recording device 200 is, for example, an inkjet printer that performs recording by ejecting ink as a liquid onto paper P as a medium. 10, the direction along the X axis indicates the width direction of the recording device 200, the direction along the Y axis indicates the depth direction of the recording device 200, and the direction along the Z axis indicates the height direction of the recording device 200.

[0033] As shown in FIG. 10, the recording device 200 includes a recording unit 32. The recording unit 32 is housed in a housing 41. The recording unit 32 includes a recording head 40 that records on paper P and a carriage 37. A plurality of nozzles are arranged at equal intervals along the Y axis on a head surface located below the recording head 40. The recording head 40 is mounted on a carriage 37 that can move back and forth along the X axis, and performs recording by ejecting ink from the nozzles onto the paper P while moving along the X axis. The paper P may be, for example, plain paper, thin paper, cardboard, or coated paper such as photo paper.

[0034] A document reading device 44 is disposed on the housing 41. The document reading device 44 has a horizontal document placement surface made of transparent glass or the like on which a document to be read is placed, and a lid 46 that can cover the document placement surface. The lid 46 has an ADF (Auto Document Feeder) and is provided with a paper feed opening 46a for feeding documents. By feeding a document through the paper feed opening 46a, copying, reading, and other processes can be easily performed.

[0035] An operation unit 35 for operating the recording device 200 is provided on the front surface of the recording device 200. The operation unit 35 is a panel that is long horizontally in the direction along the X axis, and is provided with a power button 35a that is operated to turn the recording device 200 on or off, operation buttons 35b that are operated to input various types of operation information, and a display panel 45 that can display operation statuses, etc. The display panel 45 is, for example, a liquid crystal panel.

[0036] A liquid storage unit 33 is disposed at the bottom of the recording device 200. The liquid storage unit 33 houses a plurality of ink containers 10 of the above embodiment, each containing ink to be supplied to the recording head 40. Tubes (not shown) are connected to the ink containers 10, and ink is supplied to the recording head 40 via these tubes. By employing ink containers 10 with a simple configuration as ink cartridges, costs can be reduced.

[0037] A paper setting unit 38 in which paper can be set is disposed on the rear surface of the recording device 200. Paper set in the paper setting unit 38 can be transported to the recording head 40 side by a paper transport unit (not shown) composed of transport rollers and the like.

[0038] Further, a paper feed cassette 36 for storing paper P is provided below the recording unit 32. The paper P stored in the paper feed cassette 36 can be transported to the recording head 40 side by a paper transport unit composed of transport rollers and the like.

[0039] The paper P on which recording has been performed by the recording head 40 is transported by a transport unit (not shown) and discharged to a paper discharge tray 49 provided downstream in the transport direction of the recording head 40. The paper discharge tray 49 is disposed above the paper feed cassette 36. The discharged paper P is stacked on the paper discharge tray 49.

[0040] The recording device 200 includes a control unit 60. The control unit 60 controls the carriage 37, the recording head 40, the transport unit, the document reader 44, the display panel 45, etc. The control unit 60 includes hardware such as a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The control unit 60 controls the recording device 200 by executing a predetermined control program using the CPU. The ROM is a non-volatile storage device that stores the control program executed by the CPU and data processed by the control program. The RAM forms a work area for the CPU. The CPU loads the control program read from the ROM, etc., into the RAM, and executes the loaded control program to control the recording device 200. [Explanation of symbols]

[0041] 1...accommodating body, 1a...upper surface, 1b...side surface, 1c...side surface, 1d...lower surface, 2...supply port, 2b...communicating hole, 2c...guiding hole, 3...storage section, 4...recess, 4a to 4d...recess, 5a to 5d...connecting wall, 7...parison, 7w...width, 10...ink container, 14...arrangement width, 20...molding mold, 20b...air blowing port, 21...first mold, 22...second mold, 23...molding section, 25...blow nozzle, 25b...nozzle, 25c...brim section, 32...recording unit, 33...liquid storage unit, 35...operating section, 35a ...power button, 35b...operation button, 36...paper feed cassette, 37...carriage, 38...paper setting section, 40...recording head, 41...housing, 44...document reading device, 45...display panel, 46...lid section, 46a...paper feed port, 49...paper output tray, 50...plasticizing device, 51...extrusion section, 52...extrusion mold, 53...cutter, 60...control section, 91...burr, 92...burr, 100...molding device, 200...recording device, Wa1...working area, Wa2...working area, Wa3...working area.

Claims

1. A method for manufacturing an ink container having an ink storage section and an ink supply port communicating with the ink storage section, comprising: a discharging step of discharging the parison in the Z-axis direction, a direction perpendicular to the Z-axis direction, and a direction perpendicular to the Z-axis direction and the X-axis direction, respectively, as defined by a Y-axis direction; a molding step in which a molding die is formed by a first die and a second die paired with the first die, the molding die having a molding portion whose length in the X-axis direction is greater than its length in the Z-axis direction, and the parison is sandwiched between the first die and the second die from both sides in the Y-axis direction; a molding step of inserting a blow nozzle into an air blowing port of the molding die and blowing air into the mold to mold the ink containing section, A method for manufacturing an ink container.

2. In the molding step, the blow nozzle is pressed against the resin of the air inlet to mold the inner circumferential surface of the ink supply port. The method for manufacturing the ink container according to claim 1 .

3. the ink storage portion has a plurality of recesses formed on a side surface facing the Y-axis direction by a protrusion of the molding die that protrudes in the Y-axis direction, the recesses being arranged along the X-axis direction; The parison has a width in the X-axis direction that is larger than the range in which the plurality of recesses are arranged. The method for manufacturing the ink container according to claim 1 .

4. When the discharge direction of the parison in the Z-axis direction is defined as the Z plus direction and the direction opposite to the Z plus direction is defined as the Z minus direction, a deburring step of removing burrs on the Z positive direction side and the Z negative direction side of the molded product after the molding step, In the deburring step, the burrs are removed from the portion excluding the ink supply port. The method for manufacturing the ink container according to claim 1 .

5. A method for manufacturing an ink container having an ink storage section and an ink supply port communicating with the ink storage section, comprising: a discharging step of discharging the parison in the Z-axis direction, a direction perpendicular to the Z-axis direction, and a direction perpendicular to the Z-axis direction and the X-axis direction, respectively, as defined by a Y-axis direction; a molding step of forming a molding die by using a first die and a second die paired with the first die, and sandwiching the parison between the first die and the second die from both sides in the Y-axis direction; a molding step of inserting a blow nozzle into an air blowing port of the molding die and blowing air into the mold to mold the ink containing section, In the molding step, the blow nozzle is pressed against the resin of the air inlet to mold the inner circumferential surface of the ink supply port. A method for manufacturing an ink container.

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