Container and method of manufacturing the same

Abstract

The present application relates to a container and a manufacturing method thereof. A container is used, which includes a first member serving as a lid portion, a second member serving as a container portion, and a resin filling a flow path formed between the first member and the second member when the first member and the second member are brought into contact with each other, the resin joining the first member and the second member to each other by reaching a filling target position after flowing into the flow path from a flow inlet, and an opening portion exposed to the outside of the container is provided in the flow path at a position where the resin flowing into the flow path from the flow inlet exceeds the filling target position.

Description

Technical Field

[0001] This invention relates to containers and methods for manufacturing the same. Background Technology

[0002] An inkjet recorder head installed in an inkjet recording device includes an inkjet recorder cartridge that stores liquid ink. This inkjet recorder cartridge has traditionally been manufactured by ultrasonically welding the canister and cap, which are molded components, together. Furthermore, in multi-color inkjet recorder cartridges, the flow path plate is also joined by ultrasonic welding. In recent years, a method has been proposed in which, during the manufacture of the inkjet recorder head or inkjet recorder cartridge, the molded components are joined together using in-mold assembly technology and bonded together with molten resin.

[0003] Japanese Patent Application Publication 2019-051597 discloses a method for manufacturing a liquid container, wherein the container part and the lid constituting the liquid container are joined together with resin. Figure 15 This is a schematic perspective view of a conventional liquid container 108, showing the form in which the cap (first molding part 102) and the container part (second molding part 103) are joined together.

[0004] Figure 16 It is along Figure 15 The image shows a cross-sectional view of the liquid container 108 taken along line AA. A partition wall 111 is provided in the liquid storage section 103a formed inside the second molding member 103, thereby allowing the separation and storage of various types of liquids (e.g., inks of various colors). In the first molding member 102, a pair of protrusions 109 fitted onto the partition wall 111 to prevent misalignment during connection and a space 110 (joining groove) for injecting molten resin 112 are provided in the assembly section that assembles into the second molding member 103. By injecting molten resin 112 into the space 110, the second molding member 103 and the first molding member 102 can be joined together with high precision. Summary of the Invention

[0005] In this case, when injecting molten resin to join two molded parts (e.g., a container part and a lid part) together, defects in the joining resin may occur (e.g., leakage, overflow, or shortage). Furthermore, in the technology of Japanese Patent Application Publication 2019-051597, the internal state of the molded article obtained by joining the container part and lid together with molten resin cannot be visually identified from the outside of the container, thus creating a problem where the state of the resin used in the joining cannot be identified. Therefore, even when defects in the molten resin occur, it is difficult to determine the state of the defect.

[0006] The present invention was made in view of the above-mentioned problems, and its purpose is to facilitate the determination of the state of the joining resin when multiple parts are joined together with molten resin using in-mold assembly technology.

[0007] This invention provides a container, the container comprising:

[0008] The first component used as the cover;

[0009] Used as a second component of the container section; and

[0010] The resin that fills the flow path formed between the first component and the second component when the first component and the second component come into contact with each other;

[0011] in,

[0012] The first and second components are joined together by the resin reaching the target filling position after flowing into the flow path from the inlet, and

[0013] In the flow path, an opening is provided at the position where the resin flowing in from the inlet flows out beyond the target filling position, exposing the outside of the container.

[0014] The present invention also provides a method for manufacturing a container, the container comprising a first component serving as a lid and a second component serving as a container portion.

[0015] When the first component and the second component come into contact with each other, a flow path for the resin is formed between the first component and the second component.

[0016] The methods include:

[0017] A flow path is formed by bringing the first and second components into contact with each other within the mold; and

[0018] The first and second components are joined together by allowing resin to flow from the inlet into the flow path and reach the target filling location.

[0019] in,

[0020] In the flow path, an opening is provided at the point where the resin flowing in from the inlet flows out beyond the target filling position, exposing the outside of the container.

[0021] According to the present invention, when multiple parts are joined together with molten resin using in-mold assembly technology, the state of the joined resin can be easily determined.

[0022] Other features of the invention will become clear from the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic perspective view of the inkjet recording cartridge;

[0024] Figure 2 This is an exploded perspective view of the inkjet recording cartridge;

[0025] Figure 3 This is a side view showing the opening of Embodiment 1;

[0026] Figure 4A and Figure 4B These are exploded plan views of the openings in Embodiment 1.

[0027] Figure 5A and Figure 5B These are exploded plan views showing the flow path for the molten resin to flow into in Example 1;

[0028] Figure 6 This is a flowchart illustrating the manufacturing and inspection process of liquid containers;

[0029] Figure 7A and Figure 7B These are schematic diagrams showing the state in Example 1 where there is no molten resin in the opening;

[0030] Figure 8A and Figure 8B These are schematic diagrams showing the state of molten resin present in the opening in Example 1;

[0031] Figure 9 This is a plan view showing the mating surface of the third molding component in Embodiment 2 that engages with the second molding component;

[0032] Figure 10 This is a perspective view showing the state of the molten resin bonding in Example 2;

[0033] Figure 11 This is an enlarged perspective view of the area near the buffer section in Example 2;

[0034] Figure 12 This is a schematic plan view illustrating the method for visually recognizing the joints of molded articles in Embodiment 3;

[0035] Figure 13 This is a schematic perspective view showing the field of view of the molded article in Example 4;

[0036] Figures 14A to 14D It is a schematic side view of the molded product from various perspectives;

[0037] Figure 15 It is a schematic perspective view of a conventional liquid container; and

[0038] Figure 16 This is a cross-sectional view of a conventional liquid container. Detailed Implementation

[0039] Preferred embodiments of the invention will now be described in detail illustratively with reference to the accompanying drawings. Note that the dimensions, materials, shapes, and relative arrangements of the components described in the following embodiments should be appropriately varied according to the construction of the device to which the invention is applicable and various conditions. Therefore, unless explicitly stated otherwise, the scope of the invention is not intended to be limited to the dimensions, materials, shapes, and relative arrangements of the embodiments.

[0040] This invention is applicable to the manufacture of molded articles using in-mold molding technology. In in-mold molding, multiple molded parts are housed in a mold in a state where the multiple molded parts are in contact with or assembled with each other, and the multiple molded parts are joined together by injecting molten resin into a flow path such as a joining groove. The molded articles of this invention can be particularly preferably applied to, for example, liquid containers comprising a cap and a container portion, and methods thereof. Examples of liquid containers include inkjet recording cartridges used in inkjet recording heads of inkjet recording devices.

[0041] Example 1

[0042] structure

[0043] Figure 1 This is a perspective view showing an example of an inkjet recording cartridge (hereinafter referred to as "cartridge 001"). Cartridge 001 includes a first molding part 002, a second molding part 003, a third molding part 004, and an opening 005.

[0044] Figure 2 This is an exploded perspective view of box 001. Filter 006 and absorber 007 are inserted into first molding member 002, second molding member 003, and third molding member 004. In this embodiment, first molding member 002 is the lid of the container, and second molding member 003 is the liquid storage tank. The chip is adhered to third molding member 004, and third molding member 004 serves as a liquid discharge component. Note that the invention can be applied to any construction in which at least two components are joined together to form a container. In the case of manufacturing a liquid container, at least the first component serving as the lid and the second component serving as the container portion are joined together. The first component corresponds to the first molding member 002 in this embodiment, and the second component corresponds to the second molding member 003 in this embodiment.

[0045] For the molten resin 012, it is preferable to use a thermoplastic resin with a flowability higher than that of the first molding part 002, the second molding part 003, and the third molding part 004. For each of the first molding part 002, the second molding part 003, and the third molding part 004, the resin material is suitable, and the melting point of the resin material is preferably higher than that of the molten resin 012. Note that the material of the molten resin 012 and each molding part is not limited thereto.

[0046] Figure 3, Figure 4A and Figure 4B ,as well as Figure 5A and Figure 5B Each of these is a schematic diagram illustrating a method for visually recognizing the joints of molded articles in Embodiment 1. Figure 3 A configuration is shown in which an opening 005, which allows for visual identification of the state of the molten resin 012, is provided at the extension of the final filling portion 013 when the first molding component 002, the second molding component 003, and the third molding component 004 are connected and bonded together with the molten resin 012. Figure 3 This is a side view showing the opening 005, which is located at the extension of the final filling portion 013 and allows for visual identification of the state of the molten resin 012.

[0047] exist Figure 3 In the illustrated box 001, there are cases where the liquid storage section is separated into multiple liquid storage tanks, and cases where the liquid storage section consists of a single liquid storage tank. The box 001 with its separate structure is used, for example, as a color box, and provides different storage tanks to correspond one-to-one with liquids (inks) of different colors (e.g., cyan (C), magenta (M), and yellow (Y)). Each storage layer is separated by a partition wall. Furthermore, the box 001 with a single liquid storage tank can also be used as a box for a single color, such as a box for black (BK).

[0048] Figure 4A This is a plan view showing the mating surface of the third molding component 004 that engages with the second molding component 003. The third molding component 004 has a flow path 020 for the flow of molten resin 012. Figure 4A The flow path 020 includes a lower flow path 020c, an upper and lower connected flow path 020b (one on the left and one on the right), and an opening connected flow path 020d. Although dashed lines are drawn to indicate the boundaries between the lower flow path 020c, the upper and lower connected flow path 020b, the opening connected flow path 020d, and the opening 005 for convenience, these flow paths and openings are actually connected to each other. Note that the terms "upper" and "lower" used in this specification are for illustrative purposes and are not intended to define the upper and lower sides when arranging the actual container.

[0049] Figure 4B This is a plan view showing the mating surface of the second molding component 003 that engages with the third molding component 004. The second molding component 003 also includes a flow path 020 for the flow of molten resin 012. Figure 4BThe flow path 020 also includes a lower flow path 020c, an upper and lower connected flow path 020b (one on the left and one on the right), and an opening connected flow path 020d. Similarly, the dashed lines indicating the boundaries are drawn for convenience. When the second molding component 003 and the third molding component 004 come into contact with each other, the corresponding grooved flow paths overlap to form flow path holes through which the molten resin 012 flows.

[0050] Figure 5A This is a plan view showing the mating surface of the first molding component 002 that engages with the second molding component 003. The first molding component 002 has a flow path 020 for the flow of molten resin 012. Figure 5A The flow path 020 includes an upper flow path 020a and an upper and lower connected flow path 020b (one on the left and one on the right). Furthermore, on the second surface (opposite to the mating surface (first surface) shown in the figure), a gate 021 serving as a resin inlet is provided on one of the two surfaces of the first molding member 002. As shown, the gate 021 communicates with the upper flow path 020a via the interior of the first molding member 002.

[0051] Figure 5B This is a plan view showing the mating surface of the second molding component 003 that engages with the first molding component 002. The second molding component 003 also includes a flow path 020 for the flow of molten resin 012. Figure 5B The flow path 020 also includes an upper flow path 020a and an upper and lower connected flow path 020b (one on the left and one on the right). When the first molding component 002 and the second molding component 003 are in contact with each other, the corresponding groove-shaped flow paths overlap each other to form a flow path hole for the molten resin 012 to flow through. In addition, when the first molding component 002, the second molding component 003 and the third molding component 004 are joined together and disposed in the mold, the upper and lower connected flow path 020b is used as a flow path when the molten resin 012 injected from the gate 021 into the upper flow path 020a flows into the lower flow path 020c.

[0052] In this embodiment, similar grooves are formed on both contacting mating surfaces to form a flow path. This allows for a high-strength bond. However, the construction used to form the flow path is not limited to this. For example, a construction can be used in which a continuous groove is provided on one of the two mating surfaces, while a discontinuous groove is provided on the other. Furthermore, a construction can be used, for example, in which a groove is provided on one of the two mating surfaces, while no groove is provided on the other. Any method that allows the formation of a flow path through which molten resin 012 can pass when the two mating surfaces are engaged can be used.

[0053] Manufacturing and inspection processes

[0054] The process of manufacturing and inspecting a box 001, which includes a liquid storage tank as described in this embodiment, will be described.

[0055] exist Figure 6 In the flowchart, the process in this embodiment begins when all the molding components and the components (e.g., filters and absorbers) inserted into the container are complete. In step S1, the components are assembled, such as... Figure 2 As shown. At this point, it is preferable that the assembly parts provided in each molding component are assembled with each other. Next, in step S2, the assembled molding components are arranged inside the mold. At this point, the gate 021 is in a state where it can be approached from outside the mold. Furthermore, the opening 005 is in a state where the opening 005 faces the inner wall of the mold. Therefore, the molten resin 012 reaching the opening 005 is covered by the mold, and thus the molten resin 012 will not flow out of the box 001.

[0056] Next, in step S3, molten resin 012 is injected from gate 021, thereby filling flow path 020 with molten resin 012. Specifically, first, the upper flow path 020a is filled with molten resin 012 injected from gate 021. Subsequently, molten resin 012 reaches the lower flow path 020c via the upper and lower connecting flow path 020b. Then, after filling the lower flow path 020c with molten resin 012, molten resin 012 reaches the final filling section 013. Note that the final filling section 013 is the position in the flow path where the resin can be completely filled to a certain extent when forming the housing 001, and is used as the position where the resin reaches the target. That is, the term "final" does not preclude the resin that has reached the final filling section 013 from further flowing to the opening 005 located in front of the final filling section 013. Therefore, the "final filling section" can be referred to as the "filling target position". Furthermore, although it will be described in detail later, in this embodiment, the molten resin 012 reaches the opening 005 via the opening connecting flow path 020d after reaching the final filling part 013.

[0057] Next, in step S4, the molten resin 012 in the flow path solidifies over time. Thus, the first molding component 002, the second molding component 003, and the third molding component 004 are joined together by the molten resin 012, forming a box 001 that serves as a liquid container. Next, in step S5, product inspection is performed by removing the mold and visually inspecting the opening 005.

[0058] Next, the inspection method using opening 005 will be described. For example... Figure 3 as well as Figure 4A and Figure 4BAs shown, opening 005 is an opening provided at the extension of the final filling section 013 for visually identifying the state of the molten resin 012 and exposed to the outer wall of the box 001. Users can visually inspect the molten resin 012 for defects such as leakage, overflow, or shortage by visually inspecting opening 005. Note that "visual inspection" includes not only visually inspecting opening 005 but also inspecting it by taking a photograph of opening 005 with a camera and performing image processing.

[0059] Will use Figure 7A and Figure 7B as well as Figure 8A and Figure 8B This describes the inspection performed using visual recognition. Here, in this embodiment, the amount of molten resin 012 is set to allow not only the final filling portion 013 to be filled with molten resin 012, but also to allow molten resin 012 to reach the opening portion 005. Furthermore, when the mold is removed, it is determined whether the flow path is filled with resin to the opening portion 005. Subsequently, if the molten resin 012 does not reach the opening portion 005, it is determined that there is a possibility that the molten resin 012 may have defects such as leakage, overflow, or shortage. On the other hand, if the cured molten resin 012 fills the opening portion 005, it is determined that no defects exist.

[0060] Note that if only a portion of the opening 005 is filled with molten resin 012 while the rest is not, a defect is generally considered to exist. However, depending on the construction of the opening connecting flow path 020d or the opening 005, there are also cases where the product is deemed acceptable based on the presence of molten resin 012 at the opening 005.

[0061] In the past, visual inspection could be used to identify whether there was leakage or overflow of molten resin 012 in the outer part of the molded box 001. However, there was no means to identify leakage or overflow if it existed inside the box 001. To address this problem, in this embodiment, the opening 005 is configured to allow the state of the molten resin 012 to be visually identifiable.

[0062] Will be used Figure 7A and Figure 7B as well as Figure 8A and Figure 8B To describe the inspection method in more detail. Figure 7A This is a schematic perspective view showing the state in which molten resin 012 is not present in the opening 005. Figure 7B This is a partial enlarged view of opening 005. As shown, molten resin 012 did not reach opening 005, and a defect such as leakage or overflow has been identified.

[0063] Figure 8A This is a schematic perspective view showing the state in which molten resin 012 exists in the opening 005 of Embodiment 1. Figure 8B This is a magnified view of opening 005. As shown, opening 005 is filled with molten resin 012, therefore it is determined that there is no defect.

[0064] Based on the above structure, the state of the molten resin 012 can be determined by using the opening 005 provided at the extension of the final filling portion 013. That is, when the opening 005 is blocked by the molten resin 012, it can be determined that the molten resin 012 has definitely reached the final filling portion 013 and reliably performed the joining between the molded parts. As a result, when multiple parts are joined together using molten resin 012 through in-mold assembly molding technology, the state of the molten resin 012 can be easily monitored. Furthermore, a reliable inspection method can be provided to detect defects in the molten resin 012, such as leakage, overflow, or shortage.

[0065] Example 2

[0066] Next, Embodiment 2 will be described with reference to the accompanying drawings. Components identical to those in the above embodiments are indicated by the same reference numerals, and the description will be simplified.

[0067] structure

[0068] Figures 9 to 11 Each is a schematic diagram illustrating a method for visually recognizing the joints of molded articles in Embodiment 2. Figure 9 This is a plan view showing the engagement surface of the third molding member 004 that engages with the second molding member 003, and also showing the structure in which the buffer portion 014 is provided at the extension of the opening portion 005. Figure 10 This is a perspective view showing the mating surface of the third molding component 004 that is engaged with the second molding component 003, and showing the state when the molten resin 012 is engaged. Figure 11 This is a magnified perspective view of the area near buffer section 014 in Figure 7.

[0069] Figure 9 This is a diagram showing the mating surface of the third molding member 004 that engages with the second molding member 003. The difference from the construction of Embodiment 1 is that the buffer portion 014 is provided at the extension of the opening 005.

[0070] In this embodiment, when the molten resin 012 flowing in from the gate 021 solidifies, the molten resin 012 forms a liquid container as Figure 10 The shape shown. That is to say, Figure 10 The state is shown when molten resin 012 is used as a joining component.

[0071] Figure 11 It's enlarged. Figure 10 Perspective view near the buffer section 014. (See image) Figure 9 and Figure 11 As shown, the buffer section connecting flow path 020e and the buffer section 014 are provided on the opposite side of the final filling section 013 and the opening connecting flow path 020d via the opening 005. The buffer section connecting flow path 020e and the buffer section 014 can be formed by providing grooves or recesses in each molded part in a manner similar to other parts of the flow path.

[0072] function of the buffer section

[0073] The buffer section 014 serves to absorb deviations in the filling amount of molten resin 012 that joins the connected molding parts together. In other words, the purpose of the buffer section 014 is different from that of the flow path 020, which serves as the injection path for the molten resin 012.

[0074] Here, in the construction of Example 1, the filling amount of molten resin 012 is set to allow molten resin 012 to at least reach the opening 005. However, there is a possibility that the filling amount of molten resin 012 may deviate. In addition, there is also a possibility that the total volume of the flow path 020 may deviate due to manufacturing errors of the individual molding parts.

[0075] If the filling amount is less than the design value or the total volume of the flow path 020 is greater than the design value, there is a possibility that the molten resin 012 may not reach the opening 005. To address this issue, assuming such a deviation occurs, the filling amount of the molten resin 012 is set to the amount that allows the molten resin 012 to reach the opening 005. Therefore, even when there are deviations in the filling amount or the total volume of the flow path, product inspection can be performed accurately.

[0076] On the other hand, if the filling amount is greater than the design value or the total volume of the flow path 020 is less than the design value, there is a possibility that the molten resin 012 may have nowhere to go after reaching the opening 005. Therefore, even if the amount of molten resin 012 is large relative to the total volume of the flow path, the buffer section 014 of this embodiment can be provided to absorb the molten resin 012 that has flowed out beyond the opening 005.

[0077] Therefore, by providing a buffer portion 014 at the extension of the opening 005 on the opposite side of the final filling portion 013, deviations in the filling amount of the molten resin 012 can be absorbed while maintaining the effect of allowing visual recognition of the state of the molten resin 012.

[0078] Example 3

[0079] Next, Embodiment 3 will be described with reference to the accompanying drawings. Components identical to those in the above embodiments are indicated by the same reference numerals, and the description will be simplified.

[0080] Figure 12 This is a schematic plan view illustrating a method for visually recognizing the joints of molded articles in Embodiment 3. The difference between this embodiment and Embodiment 2 is that the buffer portion 014 is integrated with the opening portion 005. That is, instead of providing a buffer portion connecting to the flow path 020e, the buffer portion 014 is formed as an integral part of the opening portion 005.

[0081] Therefore, even without providing a buffer section to connect the flow path 020e and integrating the buffer section 014 with the opening 005, it is possible to store the molten resin 012 that overflows due to deviations in filling amount or total flow path volume into the buffer section 014 via the opening 005.

[0082] In this embodiment, there is no need to provide a buffer section connecting to the flow path 020e. Therefore, this embodiment is effective when the size of the molded part or the amount of molten resin is limited. Thus, the size of the box can be reduced and the amount of resin used can be reduced.

[0083] Example 4

[0084] Next, Embodiment 4 will be described with reference to the accompanying drawings. Components identical to those in the above embodiments are indicated by the same reference numerals, and the description will be simplified.

[0085] Figure 13 and Figures 14A to 14D Each is a schematic diagram illustrating a method for visually recognizing the joints of molded articles in Embodiment 4. Figure 13 A schematic perspective view of the entire molded part and the direction of each field of view are shown. Figures 14A to 14D A schematic side view is shown from various perspectives.

[0086] In each of the above embodiments, an opening 005 that allows visual identification of the state of the molten resin 012 is provided at the extension of the final filling portion 013. In this embodiment, in addition to the opening 005, a plurality of intermediate openings 015a to 015g are also provided to allow visual identification of the bonding state of the molten resin 012 as it progresses.

[0087] Each of the intermediate openings 015a, 015c, 015e, and 015f is formed to branch off from the upper flow path 020a and expose the exterior of the housing 001. By visually identifying the intermediate openings 015a, 015c, 015e, and 015f, the bonding status of the molten resin 012 progressing between the first molding component 002 and the second molding component 003 can be inspected.

[0088] Each of the intermediate openings 015b, 015d, and 015g is formed to branch off from the lower flow path 020c and expose the exterior of the box 001. By visually identifying the intermediate openings 015b, 015d, and 015g, the bonding status of the molten resin 012 progressing between the second molding part 003 and the third molding part 004 can be checked.

[0089] Using the structure of this embodiment, the bonding state of the molten resin 012 in progress can be visually identified. As a result, it is possible to facilitate the identification of locations where resin leakage, overflow, or shortage occurs.

[0090] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the appended claims should be given the broadest interpretation to cover all variations and equivalent structures and functions.

Claims

1. A container comprising: The first component used as the cover; Used as a second component of the container section; and The resin that fills the flow path formed between the first component and the second component when the first component and the second component come into contact with each other; in, The first and second components are joined together by the resin reaching the target filling position after flowing into the flow path from the inlet, and In the flow path, an opening is provided at the position where the resin flowing in from the inlet flows out beyond the target filling position, exposing the outside of the container; A buffer section is provided in the flow path to store the resin that has flowed out from the target filling position beyond the opening.

2. The container according to claim 1, wherein, The opening is designed to allow visual identification from outside the container to determine whether resin has reached the opening.

3. The container according to claim 1 or 2, wherein, With the first and second components housed within the mold, resin flows in from the inlet, and When the first and second components are housed inside the mold, the opening is covered by the inner wall of the mold.

4. The container according to claim 1, wherein, The buffer section and the opening are integrated.

5. The container according to claim 1, wherein, A connecting flow path is provided to connect the buffer section and the opening section to each other.

6. The container according to claim 1 or 2, wherein, In the flow path, an intermediate opening exposed to the outside of the container is provided at a position between the inlet and the target filling location.

7. The container according to claim 6, wherein, Multiple intermediate openings are provided in the flow path.

8. The container according to claim 1 or 2, wherein, The opening is located further downstream than the flow path required for the connection, and the opening is used to confirm whether the resin has arrived.

9. The container according to claim 1 or 2, wherein, In the flow path, a buffer section is located downstream of the opening, and the buffer section is different from the flow path used to join the first component and the second component together.

10. A cartridge for use in an inkjet recording device, the cartridge comprising: The container according to claim 1 or 2 stores ink; and A chip used to eject ink.

11. A method of manufacturing a container, the container comprising a first component serving as a lid and a second component serving as a container portion. When the first component and the second component come into contact with each other, a flow path for the resin is formed between the first component and the second component. The methods include: A flow path is formed by bringing the first and second components into contact with each other within the mold; and The first and second components are joined together by allowing resin to flow from the inlet into the flow path and reach the target filling location. in, In the flow path, an opening is provided at the position where the resin flowing in from the inlet flows out beyond the target filling position, exposing the outside of the container; A buffer section is set in the flow path to store the resin that has flowed out from the target filling position beyond the opening.

12. The method according to claim 11, wherein, The opening is located further downstream than the flow path required for the connection, and the opening is used to confirm whether the resin has arrived.

13. The method according to claim 11, wherein, In the flow path, a buffer section is located downstream of the opening, and the buffer section is different from the flow path used to join the first component and the second component together.

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