JP6702772B2 - Liquid supply member manufacturing method and manufacturing apparatus - Google Patents

Description

The present invention relates to a manufacturing method and a manufacturing apparatus of a liquid supply member having a liquid supply path formed therein.

This type of liquid supply member is provided, for example, in a liquid ejection head capable of ejecting a liquid supplied from a liquid container from an ejection unit, and inside the liquid supply member, a space between the liquid container and the ejection unit is provided. A liquid supply path is formed. As the liquid ejection head, there is an inkjet recording head capable of ejecting ink (liquid) supplied from an ink tank (liquid container) from a plurality of ejection ports (ejection parts). The recording head capable of ejecting a plurality of types of ink is provided with an ink supply member (liquid supply member) in which a plurality of ink supply paths (liquid supply paths) corresponding to the respective inks are formed.

In general, a liquid supply member having such a liquid supply path is composed of a combination of a plurality of parts injection-molded with a resin material, from the viewpoint of ease of manufacturing, lightness, and corrosion resistance. For example, after the plurality of parts are individually injection-molded, they are assembled by ultrasonic welding or adhesion with an adhesive material.

JP, 2002-178538, A

However, in the case of assembling a plurality of individually injection-molded parts by welding, adhesion or the like as described above, the dimensional accuracy between the plurality of parts becomes a problem. This is because the dimensional accuracy of the liquid supply member after they are assembled is affected by the molding accuracy of these parts and the bonding accuracy.

An object of the present invention is to provide a manufacturing method and a manufacturing apparatus capable of manufacturing a liquid supply member having high dimensional accuracy while ensuring the shape of a liquid supply path suitable for stable supply of liquid.

A method of manufacturing a liquid supply member according to the present invention includes a plurality of component parts including the first and second component parts so that a liquid supply path is formed between the first component part and the second component part. A method of manufacturing a liquid supply member configured according to claim 1, wherein the first component is injection-molded between the first position of the first mold and the first position of the second mold, and A first step of injection molding the second component between the second position of the first mold and the second position of the second mold; and the first step in the first position of the first mold. The first mold and the second mold are opened so that the first component is left and the second component is left in the second position of the second mold, and then the first mold is opened. Second step of relatively moving the first mold and the second mold so that the component and the second component face each other; and the liquid supply path of the first component. The first mold and the second mold so that the first region around the formation part and the second region around the formation part of the liquid supply path in the second component come into contact with each other. And a fourth step of pouring a molten resin to the outside of the first and second regions, the first mold and the second mold of the third step. In the state before closing, the distance between the first region and the first surface of the first mold in contact with the region of the first component opposite to the first region is D1, The distance between the second region and the second surface of the second mold that is in contact with the region of the second component opposite to the second region is D2, and in the third step, When the distance between the first surface and the second surface when the first mold and the second mold are closed is D3, the distances D1, D2 and D3 are D1+D2>D3. In the third step, the width W of the contact portion of the first and second regions in the width direction of the liquid supply path and the distances D1, D2, D3 are 1≦W/( D1+D2−D3)≦30, so that one of the first region and the second region when the first mold and the second mold are closed in the third step. Is characterized by pushing into the other.

According to the present invention, the injection molding of the first and second constituent parts and the joining of these constituent parts are performed in the same mold, so that a liquid supply member with high dimensional accuracy can be manufactured.

Moreover, when joining the first and second component parts, by pushing one of the regions of the first and second component parts that abut each other into the other, the regions are surely abutted. You can For example, even if a sink mark or a warp occurs in these regions, it is possible to reliably bring these regions into contact with each other over the entire surface. As a result, when the molten resin is poured to the outside of those regions, it is possible to suppress the molten resin from flowing into the portion where the liquid supply passage is formed, and to secure the shape of the liquid supply passage suitable for stable liquid supply. it can.

FIG. 3 is a perspective view of the recording head according to the first embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a main part in a manufacturing stage of the recording head of FIG. 1. FIG. 3 is a schematic cross-sectional view of a main part in a manufacturing stage of the recording head of FIG. 1. FIG. 3 is a perspective view of first and second component parts in a manufacturing stage of the recording head of FIG. 1. FIG. 3 is a perspective view of first and second component parts in a manufacturing stage of the recording head of FIG. 1. FIG. 3 is a schematic cross-sectional view of a main part of the recording head of FIG. FIG. 6 is a schematic cross-sectional view of a main part for explaining another configuration example of the recording head of FIG. 1. FIG. 6 is a perspective view of a recording head according to a second embodiment of the present invention. FIG. 9 is an exploded perspective view of the recording head of FIG. 8.

First, prior to the description of the embodiments of the present invention, as a method for manufacturing a hollow body having a hollow portion inside, injection molding of a plurality of parts and joining of the parts can be performed in the same mold. The manufacturing method (die slide injection molding) will be described. Such a manufacturing method is described in, for example, Japanese Patent Laid-Open No. 2002-178538.

In such a manufacturing method, two parts (for example, one part having an opening part and the other part forming the hollow body) forming the hollow body are displaced at positions displaced in a pair of molds (fixed side mold and movable side mold). Respectively, injection-molds (primary molding) each of the parts that cover the opening), and then opens the mold. In that case, one of the two parts is left in the fixed mold and the other is left in the movable mold. Next, one of the molds that remains in the fixed-side mold and the other part that remains in the movable-side mold are slid so that they face each other, and then the molds are closed. At this time, the two parts are in contact with each other to form a hollow body, but are not joined. After that, the molten resin is poured into the abutting portions (secondary molding) to bond the parts to form a hollow body.

If a liquid supply member having a liquid supply path formed therein is manufactured by such a manufacturing method, molding and joining of a plurality of parts constituting the liquid supply member should be performed in the same mold. Thereby, the joining accuracy of a plurality of components can be suppressed to about the size of one component. However, on the surfaces of the two parts that are in contact with each other during the secondary molding, portions that do not locally contact the surfaces are generated due to the effects of sink marks and warpage that occur when the mold is separated from the mold after the primary molding. There are cases. When such a non-contact portion occurs, the molten resin for secondary molding flows into the formation space of the liquid supply passage from that portion, and the shape of the liquid supply passage suitable for stable supply of the liquid is secured. There is a risk that it will not be possible or that the liquid supply path will be blocked. Particularly, in the case of the ink supply member provided in the inkjet recording head, the ink supply path is densely configured for downsizing the recording head. Therefore, the region (flow path) through which the molten resin for secondary molding flows is also narrowed, and it is necessary to increase the pressure of the molten resin for secondary molding and pour the molten resin into the narrow region between these ink supply paths. There is. Therefore, inflow of the molten resin is particularly likely to occur. Further, when a portion having an irregular shape is formed in the ink supply path due to such inflow of the molten resin, bubbles in the ink supply path grow from that portion as a starting point and the bubbles do not escape. However, there is a possibility that the ink cannot be sufficiently supplied, and the effect is great.

The present invention has been made based on such findings.

Embodiments of the present invention will be described below with reference to the drawings. The liquid supply member in the following embodiments is an application example as an ink supply member provided in an inkjet recording head.

(First embodiment)
1A and 1B are perspective views of an inkjet recording head (liquid ejection head) 1 including an ink supply member (liquid supply member) according to this embodiment. The recording head 1 of this example is mounted on a carriage of a so-called serial scan type inkjet recording apparatus (liquid ejection apparatus). The recording head 1 may be arranged in a so-called full-line inkjet recording apparatus.

The recording head 1 of this example that ejects various liquids such as ink includes an ink supply member (housing) 2, a recording element unit 3, and an electrical connection board 5. Ink (liquid) is supplied to the recording element unit 3 from an unillustrated ink tank (liquid container) through the connection part 4 of the ink supply member 2 and the ink supply path (liquid supply path) in the ink supply member 2. It In the recording element unit 3, a plurality of ejection openings capable of ejecting ink are arranged so as to form an ejection opening row (not shown). An electrothermal conversion element (heater) or a heater is provided for each ejection opening. A discharge energy generating element such as a piezo element is provided. In this example, a total of six colors of ink are supplied from the six connecting portions 4, and these inks are ejected from the ejection port arrays corresponding to them. Therefore, the ink supply member 2 is provided with an ink supply path that connects the six connection portions 4 and the ejection rows corresponding to the six connection portions 4. Since the adjacent intervals of the ejection port arrays corresponding to the six connection parts 4 are smaller than the adjacent intervals of the six connection parts 4, the ink flow paths corresponding to them include a bent shape. By driving an ejection energy generating element through the electrical connection board 5 by a recording device (not shown), ink is ejected from the corresponding ejection port.

2 to 5 are explanatory views of the method for manufacturing the ink supply member, and the manufacturing method (die slide injection molding) is basically used as the manufacturing method. 2(a) and 2(b) are schematic cross-sectional views of the mold and the molded part in the first and second steps of the manufacturing process, and FIGS. 3(a) and 3(b) are the third and fourth steps. 3C is a schematic cross-sectional view of the mold and the molded part in the step of FIG. 3, and FIG. 3C is a cross-sectional view of the ink supply member taken out from the mold. 4(a) and 4(b) are explanatory diagrams of the positional relationship of the molded parts in the first and second steps, and FIGS. 5(a) and 5(b) are the molded parts in the third and fourth steps. It is explanatory drawing of a positional relationship. 6(a), (b), (c), and (d) are explanatory views of the positional relationship of the essential parts of the molded part in the first, second, third, and fourth steps, respectively.

In the first step, as shown in FIG. 2A, inside the pair of molds 61 and 62, first and second component parts (molded parts) 21 and 22 that form the ink supply member 2. Is injection molded with a resin material. The first component 21 is molded between the first position of the mold (first mold) 61 and the first position of the mold (second mold) 62, and the second component 22 Is molded between the second position of the mold 61 and the second position of the mold 62. A resin material for molding them is supplied through gates 621 and 622 provided in the mold 62. The mold 61 can slide along the arrow X direction. By a moving mechanism (not shown), the molds 61 and 62 are relatively moved in a mold clamping direction and a mold opening direction which are directions orthogonal to the arrow X, and the mold 61 is moved in the arrow X direction and the opposite direction. Be moved to.

A groove portion (formation portion of the ink supply passage) 213 which is a part of the ink supply passage is formed in the first component 21. The second component 22 has a lid 223 that forms an ink supply path together with the groove 213. The width W2 of the lid portion 223 is larger than the width W1 of the groove portion 213 so that the opening portion of the groove portion 213 can be entirely closed (see FIGS. 2B and 6A). ).

As shown in FIG. 1A, in the posture of the recording head 1 in which the recording element unit 3 is located below, the groove portion 213 and the lid portion 223 extend in a horizontal plane. That is, the ink supply path formed by the groove portion 213 and the lid portion 223 includes a portion extending along the horizontal plane in the posture of the recording head 1 when in use. In FIG. 4A, a plurality of groove portions 213 for forming ink supply passages corresponding to each of the six types of ink are formed in the first component part 21, and the second component part 22 is formed. Has a lid 223 (not shown) corresponding to the grooves 213. Further, in the posture of the recording head 1 in use, the ink supply path extends in the vertical direction in the vicinity of the connecting portion 4 and in the vicinity of the connecting portion with the recording element unit 3, and in the vertical direction. A bent portion is formed at a connecting portion between the extending portion and the portion extending along the horizontal plane. In this example, the same resin material containing a filler is used as the molding material for the first and second component parts 21 and 22.

In the next second step, as shown in FIG. 2B, after opening the molds 61 and 62, the mold 61 holding the first component 21 is slid in the arrow X direction, As shown in (b), the first component 21 is opposed to the second component 22 held by the mold 62. As a result, as shown in FIG. 6B, a region (first region) A1 around the groove 213 and a region (second region) A2 around the groove 213 of the lid 223 protruding in the width direction from the groove 213. And, face each other. That is, the areas A1 and A2 are defined in a state where the components 61 and 62 are formed by the molds 61 and 62 and the molds 61 and 62 are opened (before the molds 61 and 62 are clamped again). To be done. The area A1 is an area adjacent to the groove 213, and is an area with which the lid 223 abuts when the mold is clamped again. The area A2 is an area of the front end surface of the lid portion 223 that comes into contact with the component 21 when the mold is clamped again.

In the next third step, the molds 61 and 62 are clamped again as shown in FIG. 3A and the regions A1 and A2 are brought into contact with each other as shown in FIGS. 6B and 6C. As a result, the ink supply path 23 is formed in the groove portion 213 closed by the areas A1 and A2.

In the next fourth step, as shown in FIGS. 3B and 6D, the sealing resin 24 is formed by pouring the molten resin into the regions outside the regions A1 and A2. The molten resin forming the sealing member 24 is supplied through a gate 624 provided in the mold 62. Due to the compatibility of the resin, the first component 21 and the sealing member 24 are joined together, and the second component 22 and the sealing member 24 are joined together to form the ink supply member 2. .. At this time, a part of the regions A1 and A2 may be compatible with each other by the heat of the molten resin. In this example, the same resin material as the first and second component parts 21 and 22 is used as the molten resin. The resin material forming the sealing member 24 may be any material that is compatible with the first and second constituent parts 21 and 22, and may be a material different from those constituent parts 21 and 22. The ink supply member 2 composed of the first and second component parts 21 and 22 and the sealing member 24 is taken out from the molds 61 and 62 as shown in FIG.

Next, the relationship between the areas A1 and A2 will be described.

The position P1 in FIG. 2B is located on the inner surface (first surface) of the mold 61, and the mold 61 is at the position P1 in the mold clamping direction (direction orthogonal to the arrow X) in the figure. In contact with the surface of the first component 21 located on the side opposite to the surrounding area A1. In the mold clamping direction, the distance between the position of the area A1 and the position P1 is D1. Further, the position P2 in FIG. 2B is located on the inner surface (second surface) of the mold 62, and the mold 62 is located at the position P2 on the opposite side of the peripheral region A2 in the mold clamping direction. , The surface of the second component 22. In the mold clamping direction, the distance between the position of the area A2 and the position P2 is D2. Further, as shown in FIG. 3A, the distance between the positions P1 and P2 in the mold clamping direction when the molds 61 and 62 are closed is D3. These distances D1, D2, D3 have the relationship of the following expression (1).
D1+D2>D3 (1)
The distance D3 is a distance defined according to the shape of the ink supply member 2 (the shape of the portion where the ink supply path 23 is formed), as shown in FIG. Corresponds to the inner surface facing distance. The distance D1 corresponds to the shape of the groove 213 of the first component 21, and the distance D2 corresponds to the shape of the lid 223 of the second component 22. The total of the distances D1 and D2 is set to be larger than the distance D3 defined according to the shape of the ink supply member 2. Therefore, at the end of the third step, as shown in FIG. 6C, the area A2 is pressed into the area A1 (embedded state). At this time, as for the shape in the vicinity of the regions A1 and A2, only one of the region A1 side and the region A2 side may be deformed with respect to the shape at the end of the second step, or both of them may be deformed. May be deformed.

At the end of the second step, the entire warp or part of the surface of the first component 21 released from the mold 62 and the surface of the second component 22 released from the mold 61. Sink marks and the like occur. Therefore, the areas A1 and A2 do not become perfect planes. Therefore, when the areas A1 and A2 are brought into contact with each other in such a state that they are simply in contact with each other (when D1+D2=D3), they are the contact portions in the subsequent third step of FIG. A gap may occur in a part between the areas A1 and A2. In such a case, as described above, in the subsequent fourth step of FIG. 3B, the molten resin may enter the ink supply path 23 through the gap.

In the present example, as shown in FIG. 6C, by pushing the area A2 against the area A1, the area A1 and the area A2 are surely brought into contact with each other to prevent the molten resin from flowing into the ink supply path 23. Intrusion can be suppressed. The relative pressing amount Z between the area A1 and the area A2 is set to an amount that can absorb the flatness variation of the areas A1 and A2 at the end of the second step. On the other hand, when the pushing amount Z is excessively large, the groove portion 213 and the lid portion 223 may be largely deformed, and the shape of the ink supply path 23 and other portions may be affected. The pushing amount Z is preferably 0.03 mm or more and 0.2 mm or less.

When the pressing amount Z is too large with respect to the width W (FIG. 6C) of the contact portions of the regions A1 and A2, the shapes of the contact portions are changed by the mold clamping of the molds 61 and 62. There is a risk that they may collapse and a gap may be created between these abutting parts, or an irregularly shaped part may be created in the ink supply path 23. Further, if the width W of the contact portions is too small, the shapes of the end portions of the groove portion 213 and the lid portion 223 collapse during the compatibilization of the molten resin due to the heat, and the ink supply passage is formed from that portion. There is a possibility that the molten resin will flow into the inside of 23. On the other hand, when the width W of the contact portions is too large, the mold clamping force of the molds 61 and 62 is dispersed at the contact portions, and the relative pushing in of them becomes insufficient, and the sink marks are generated. There is a possibility that the part where the occurrence of is not able to contact completely. From such a viewpoint, it is desirable that the relationship between the pushing amount Z and the width W of the contact portion is set so that W/Z is 1 to 30. That is, it is desirable to set so as to satisfy the relationship of the following expression (2).
1≦W/(D1+D2-D3)≦30 (2)
As described above, in the ink supply member 2 of the recording head 1, since the plurality of ink supply paths 23 are densely formed, in the fourth step of FIG. 3B, the melt forming the sealing member 24 is performed. The injection pressure of resin tends to increase. Further, since the ink supply path 23 is fine, if the molten resin forming the sealing member 24 enters the ink supply path 23, the supply of ink is likely to be hindered. From these viewpoints, in the ink supply member 2 of the recording head 1, it is more preferable to set W/Z to be 1.5 to 20. That is, it is desirable to set so as to satisfy the relationship of the following expression (3).
1.5≦W/(D1+D2-D3)≦20 (3)
It is desirable that the corner portions (ridge lines) of the groove portion 213 and the lid portion 223 be located at the contact portions of the regions A1 and A2, as shown in FIG. According to the present invention, in a cross section orthogonal to the extending direction of the ink supply path 23 as shown in FIG. 7A, only one of the areas A1 and A2 is a surface and the corners may not be located. .. However, in the case of FIG. 7A, the region A2 portion of the second component 22 needs to have a sufficiently large width so as not to be collapsed by the pressure of the molten resin forming the sealing member 24. As a result, the width of the contact portion between the areas A1 and A2 also increases. In those contact portions, in the vicinity of the sealing member 24, the stress generated by the crushing of the regions A1 and A2 is relaxed by the heat of the molten resin, but in the portion away from the sealing member 24, Since heat transfer is small, stress tends to remain. Therefore, as shown in FIG. 6, it is more preferable to arrange the corners of the groove 213 and the lid 223 at the contact portions of the areas A1 and A2 to suppress the width of the contact portions of the areas A1 and A2.

Further, in the present example, as shown in FIG. 3, the shape of the sealing member 24 (the shape of the flow path through which the molten resin flows) is the first component 21, the second component 22, and the molds 61, 62. Stipulated by However, as shown in FIG. 7B, the shape of the sealing member 24 may be defined only by the first component 21 and the second component 22. In this case, the contact portions of the areas A1 and A2 located along the ink supply path 23 are formed with a portion that is relatively pressed in, as in the above-described example. On the other hand, at the contact portion between the region (third region) B1 and the region (fourth region) B2 that defines the outside of the molten resin, such a relatively pressed portion may not be formed. In this way, by relatively pushing only the contact portions of the areas A1 and A2, it is possible to more reliably suppress the intrusion of the molten resin into the ink supply path 23. Further, a pressing amount smaller than the relative pressing amount of the regions A1 and A2 may be set to the contact portion of the regions B1 and B2.

Specifically, in FIG. 7B, the distance between the region B1 and the position P11 of the surface (third surface) of the die 61 that is in contact with the region on the opposite side of the region B1 in the first component 21. Was designated as E1. Further, the distance between the region B2 and the position P12 of the surface (fourth surface) of the second mold which is in contact with the region of the second component 22 opposite to the region B2 is E2 (P11, P12). See also FIG. 2(b). Further, the distance between the positions P11 and P12 when the molds 61 and 62 are closed is E3. The distances E1, E2, E3 and the above-mentioned distances D1, D2, D3 have the relationship of the following expression (4).
D1+D2-D3>E1+E2-E3 (4)
Further, in this example, the portion of the ink supply path 23 on the side of the first component 21 is connected to the ink tank (liquid container), and the portion of the ink supply path 23 on the side of the second component 22 is the recording element unit 3. Connected to. However, conversely, the former part may be connected to the recording element unit 3 and the latter part may be connected to the ink tank. Further, the lid 223 may be formed on the first component 21 and the groove 213 may be formed on the second component 22.

(Second embodiment)
FIG. 8A is a perspective view of the recording head 1 according to the second embodiment of the present invention. Similar to the case of the above-described embodiment, the recording head 1 includes the ink supply member (housing) 2, the recording element unit 3, and the electrical connection board 5, and the ink supply member 2 is the first one shown in FIG. , Second component parts 21 and 22. FIG. 9 is an exploded perspective view of the first and second component parts 21 and 22. In the present embodiment, the ink supply path 23 is bent in the vertical planes in the figure and is formed by the same steps as those in the above-described embodiment. The width W and the pressing amount Z of the contact portions of the regions A1 and A2 are set so that W/Z is 1 to 30 as in the above-described embodiment.

In this example, a receiving surface 215 is formed on the first component 21 and a receiving surface 225 is formed on the second component 22 as receiving surfaces for arranging the electrical connection board 5 in place. These receiving surfaces 215 and 225 are located on the same plane, and the electric connection board 5 is positioned on them.

Generally, when two parts are joined by adhesion, welding, etc., they are affected by the dimensional variation of the two parts and the joining accuracy. Therefore, when arranging the third component so as to be located on those two components, a receiving surface in contact with the third component is formed on the surface of one of the two components, and the surface of the other component is formed. Is often retracted to a position where it does not interfere with the third part. When the electric connection board 5 is used, a connection load is applied to the contacts on the recording apparatus side, so that the back surface of the electric connection board 5 may be deformed at a portion not received by the surface of the other component, and the electric connection may become unstable. There is.

On the other hand, in this example, as described above, the positional relationship between the first and second component parts 22 and 23 can be set with high accuracy, and the dimensional accuracy of the ink supply member 2 can be increased. Therefore, the relative position of the receiving surface 215 on the first component 22 side and the receiving surface 225 on the first component 22 side can be set with high accuracy, and the first and second component 22 , 23 does not have to be retracted from the electrical connection board 5. Therefore, the electrical connection board 5 can be arranged on the receiving surfaces 215 and 225 of the first and second component parts 22 and 23, and the deformation of the electrical connection board 5 can be suppressed. In this way, the outer dimensions of the ink supply member 2 are set with high accuracy while securing the shape of the ink supply path 23 that enables stable ink supply, and restrictions on the arrangement of components such as the electrical connection board 5 are reduced. can do. As a result, it is possible to reduce the cost by downsizing the first and second components 22 and 23, downsize the ink supply member 2, and thus downsize the recording head 1. Further, since the first and second constituent parts and the sealing member 24 can be formed of the same resin material, it is also preferable from the viewpoint of ink resistance (liquid contact property). Further, when they are made of the same resin material, the linear expansion coefficients of the respective parts become substantially equal, so that the influence of expansion or contraction of the respective parts due to temperature change can be reduced.

(Other embodiments)
The manufacturing target in the present invention is not limited to the ink supply member provided in the inkjet recording head, and the liquid supply member in which various liquid supply paths are formed is the manufacturing target.

1 Recording head (liquid ejection head)
2 Ink supply member (liquid supply member)
21 First Component 22 Second Component 23 Ink Supply Channel (Liquid Supply Channel)
61,62 Mold

Claims (9)

A method of manufacturing a liquid supply member configured by a plurality of component parts including the first and second component parts so as to form a liquid supply path between the first component part and the second component part. There
The first component is injection-molded between the first position of the first mold and the first position of the second mold, and the second position of the first mold and the second mold A first step of injection molding the second component between a second position;
The first mold and the first mold so that the first component remains in the first position of the first mold and the second component remains in the second position of the second mold; A second step of opening the second mold and then relatively moving the first mold and the second mold so that the first component and the second component face each other;
A first region around the portion where the liquid supply passage is formed in the first component and a second region around the portion where the liquid supply passage is formed in the second component are brought into contact with each other. A third step of closing the first mold and the second mold,
A fourth step of injecting a molten resin outside the first and second regions,
Including,
In the state before closing the first mold and the second mold in the third step, the first region and the region of the first component opposite to the first region are in contact with each other. A distance between the first surface of the first mold and the first surface is set to D1, and the second region contacts the second region and a region of the second component opposite to the second region. The distance between the two surfaces is D2,
In the third step, when the distance between the first surface and the second surface when the first mold and the second mold are closed is D3,
The distances D1, D2, D3 have a relationship of D1+D2>D3, and
In the third step, the width W of the contact portions of the first and second regions in the width direction of the liquid supply path and the distances D1, D2, D3 are
1≦W/(D1+D2-D3)≦30
In the third step, when one of the first mold and the second mold is closed, one of the first region and the second region is pushed into the other in the third process. A method for manufacturing a liquid supply member characterized by the above. A method of manufacturing a liquid supply member configured by a plurality of component parts including the first and second component parts so as to form a liquid supply path between the first component part and the second component part. There
The first component is injection-molded between the first position of the first mold and the first position of the second mold, and the second position of the first mold and the second mold A first step of injection molding the second component between a second position;
The first mold and the first mold so that the first component remains in the first position of the first mold and the second component remains in the second position of the second mold; A second step of opening the second mold and then relatively moving the first mold and the second mold so that the first component and the second component face each other;
A first region around the portion where the liquid supply passage is formed in the first component and a second region around the portion where the liquid supply passage is formed in the second component are brought into contact with each other. A third step of closing the first mold and the second mold,
A fourth step of injecting a molten resin outside the first and second regions,
Including,
At least one of said 1st area|region and said 2nd area|region contains the corner|angular part located in the contact part of said 1st and 2nd area|region, The manufacturing method of the liquid supply member characterized by the above-mentioned. A method of manufacturing a liquid supply member configured by a plurality of component parts including the first and second component parts so as to form a liquid supply path between the first component part and the second component part. There
The first component is injection-molded between the first position of the first mold and the first position of the second mold, and the second position of the first mold and the second mold A first step of injection molding the second component between a second position;
The first mold and the first mold so that the first component remains in the first position of the first mold and the second component remains in the second position of the second mold; A second step of opening the second mold and then relatively moving the first mold and the second mold so that the first component and the second component face each other;
A first region around the portion where the liquid supply passage is formed in the first component and a second region around the portion where the liquid supply passage is formed in the second component are brought into contact with each other. A third step of closing the first mold and the second mold,
A fourth step of injecting a molten resin outside the first and second regions,
Including,
The first and second components have an outer shape of the molten resin that is cast in the fourth step when the first mold and the second mold are closed in the third step. A method of manufacturing a liquid supply member, comprising: a third region and a fourth region that abut each other as defined . In the state before closing the first mold and the second mold in the third step, contact the first region and a region of the first component opposite to the first region. A distance between the first surface of the first mold and the first surface is set to D1, and the second region contacts the second region and a region of the second component opposite to the second region. The distance between the two surfaces is D2,
When the distance between the first surface and the second surface when the first mold and the second mold are closed in the third step is D3,
The distance D1, D2, D3 is a manufacturing method of the liquid supply member according to claim 2 or 3, characterized in that a relation of D1 + D2> D3. In the third step, the width W of the contact portion of the first and second regions in the width direction of the liquid supply path and the distances D1, D2, D3 are
1≦W/(D1+D2-D3)≦30
The liquid supply member manufacturing method according to claim 4 , wherein the liquid supply member has the following relationship. In the third step, the width W of the contact portion of the first and second regions in the width direction of the liquid supply path and the distances D1, D2, D3 are
1.5≦W/(D1+D2-D3)≦20
The liquid supply member manufacturing method according to claim 4, wherein the liquid supply member has the following relationship. In the state before closing the first mold and the second mold in the third step, the third region and a region on the opposite side of the third region in the first component are in contact with each other. The distance between the third surface of the first mold and E1,
The distance between the fourth region and the fourth surface of the second mold which is in contact with the region of the second component opposite to the fourth region is E2,
When the distance between the third surface and the fourth surface when the first mold and the second mold are closed in the third step is E3,
The distances E1, E2, E3 and the distances D1, D2, D3 are
D1+D2-D3>E1+E2-E3
The method for manufacturing a liquid supply member according to any one of claims 1, 4, 5, and 6, characterized in that Wherein the plurality of components includes a third part products,
The third part products, characterized said first receiving surface formed of a first component, a second receiving surface formed on the second component, that is attached respectively to the contact of the The method for manufacturing a liquid supply member according to claim 1, wherein A manufacturing apparatus for a liquid supply member configured by a plurality of constituent parts including the first and second constituent parts so as to form a liquid supply path between the first constituent part and the second constituent part. There
A first mold and a second mold;
The first component is injection-molded between the first position of the first mold and the first position of the second mold, and the second position of the first mold and the second mold. Molding means for injection molding said second component between said second component and said second position;
The first mold and the first mold so that the first component remains in the first position of the first mold and the second component remains in the second position of the second mold; Moving means for relatively moving the first mold and the second mold so that the first component and the second component are opposed to each other after opening the second mold;
A first region around the portion where the liquid supply passage is formed in the first component and a second region around the portion where the liquid supply passage is formed in the second component are brought into contact with each other. Mold closing means for closing the first mold and the second mold,
Means for pouring the molten resin outside the first and second regions,
Including,
Opposite to the first region and the first region in the first component after injection molding the first and second components and before closing the first and second molds. The distance between the first surface of the first mold and the first surface that is in contact with the second area is D1, and the second area is in contact with the second area of the second component that is opposite to the second area. 2 The distance between the second surface of the mold and D2,
After the injection molding of the first and second components, the first surface in the closing direction of the first mold and the second mold in a state where the first and second molds are closed. When the distance to the second surface is D3,
The molding means is
Injection molding the first and second component parts so that the relationship of D1+D2>D3 is satisfied ,
In the mold closing means, the width W of the contact portion of the first and second regions in the width direction of the liquid supply path and the distances D1, D2, D3 are
1≦W/(D1+D2-D3)≦30
By closing of the second mold and the first mold so that such a relationship, the manufacturing apparatus of a liquid supply member characterized by pushing one of the second region and the first region to the other.

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