Method for molding a resin manifold

Abstract

To obtain a resin manifold with a complex shape that cannot be molded by conventional split welding molding methods. [Solution] An inlet block 2 having multiple fluid inlets 21 and inlet-side flow paths 22 communicating with the fluid inlets 21, and an outlet block 3 having multiple fluid outlets 31 and outlet-side flow paths 32 communicating with the fluid outlets 31 are molded, and the inlet block 2 and outlet block 3 are attached at intervals to a temporary assembly frame 6 corresponding to the shape of the device in which the resin manifold 1 will be installed, and multiple connecting hoses 4 are connected to each other so that the inlet-side flow paths 22 and the outlet-side flow paths 32 communicate with each other, and the temporary assembly frame 6 with the multiple connecting hoses 4 connected is fixed to a mold 7, molten foamed resin 51 is filled into the cavity formed between the mold 7 and the temporary assembly frame 6, the molten foamed resin 51 is foamed inside the cavity, and after molding, the temporary assembly frame 6 is removed from the mold 7, and the resin manifold 1 is removed from the temporary assembly frame 6.

Description

Technical Field

[0001] The present invention relates to a method for molding a resin manifold.

Background Art

[0002] Conventionally, modularization has been promoted by component manufacturers in order to reduce the assembly man-hours of automobile manufacturers. Accordingly, resin manifolds can be an important part in modularizing each component.

[0003] For example, as in Patent Document 1, if a plurality of pipes have a simple shape extending linearly, the resin manifold can be molded by blow molding.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of Invention

Problems to be Solved by the Invention

[0005] However, for resin manifolds with a large number of pipes and relatively complex shapes, a manufacturing method is adopted in which divided resin molded products are melted and joined together.

[0006] However, this molding method has a problem that it is not easy to ensure the reliability of the joint portion.

[0007] The present invention has been made in view of such points, and its object is to perform molding without divided welding even for a complex pipe shape.

Means for Solving the Problems

[0008] To achieve the above objective, this invention integrally molds the inlet block and outlet block, which are connected by multiple connecting hoses, using foamed resin.

[0009] Specifically, in the method for molding a resin manifold of the first invention, A plurality of fluid inlets and at least one inlet block having an inlet-side flow path communicating with the fluid inlets, and a plurality of fluid outlets and at least one outlet block having an outlet-side flow path communicating with the fluid outlets are formed, The at least one inlet block and the at least one outlet block are attached at intervals to a temporary assembly frame corresponding to the shape of the device on which the resin manifold is installed. Multiple connecting hoses are connected to each other so that the inlet side flow path and the outlet side flow path are in communication with each other. The temporary assembly frame to which the multiple connecting hoses are connected is fixed to the mold. The cavity formed between the mold and the temporary assembly frame is filled with foamed resin. The foamed resin is foamed inside the cavity. After molding, remove the temporary assembly frame from the mold. Remove the resin manifold from the aforementioned temporary assembly frame.

[0010] According to the above configuration, the fluid flow path is composed of multiple connecting hoses separate from the inlet and outlet blocks, making it possible to mold resin manifolds with complex shapes, such as those with intersecting pipes, which cannot be molded by conventional split welding molding. Multiple connecting hoses can be pre-connected to the inlet and outlet blocks using a temporary assembly frame, making the installation of the connecting hoses extremely easy. Because foamed resin is used for filling, the filling pressure can be significantly reduced compared to normal injection molding, thus suppressing deformation of the connecting hoses due to filling pressure. The connections between the multiple connecting hoses and the inlet and outlet flow paths are covered and protected by foamed resin, so the multiple connecting hoses will not come loose. Note that "at least one inlet block" and "at least one outlet block" include combinations of one inlet block and one outlet block, multiple inlet blocks or multiple outlet blocks, and the number of connecting hoses is determined accordingly.

[0011] In the second invention, in the first invention, When foaming the aforementioned foamed resin, fluid is filled inside the multiple connecting hoses to prevent them from deforming inward.

[0012] With the above configuration, the filling pressure of the molten foam resin can be significantly reduced compared to conventional injection molding. Furthermore, even if pressure is applied to multiple connecting hoses during foam molding due to the arrangement of the connecting hoses or the gate position, the connecting hoses will not be indented inward and the flow path will not narrow by supplying a fluid such as compressed gas or water to increase the internal pressure of the connecting hoses.

[0013] In the third invention, in the first or second invention, The mold has a pin gate formed in it for filling with the foamed resin. The foamed resin is injected from the pin gate in such a way that it does not directly come into contact with the plurality of connecting hoses.

[0014] According to the above configuration, no excessive pressure is applied to the connection hose during filling of the molten foamed resin, so the connection hose will not be recessed inward to narrow the flow path. Effects of the Invention

[0015] As described above, according to the present invention, a resin manifold having a complicated shape that cannot be molded by conventional molding by split welding can be obtained. Brief Description of the Drawings

[0016] [Figure 1A] It is a front view showing the resin manifold. [Figure 1B] It is a rear view showing the resin manifold. [Figure 1C] It is a left side view showing the resin manifold. [Figure 1D] It is a bottom view showing the resin manifold. [Figure 1E] It is a cross-sectional view taken along line IE-IE of Figure 1A. [Figure 2A] It is a front view showing the inlet block. [Figure 2B] It is a rear view showing the inlet block. [Figure 2C] It is a left side view showing the inlet block. [Figure 2D] It is a bottom view showing the inlet block. [Figure 3A] It is a front view showing the outlet block. [Figure 3B] It is a left side view showing the outlet block. [Figure 3C] It is a bottom view showing the outlet block. [Figure 4A] It is a front view showing the temporary assembly frame. [Figure 4B] It is a cross-sectional view taken along line VIB-VIB of Figure 4A. [Figure 4C] It is a plan view showing the temporary assembly frame. [Figure 5A] It is a front view showing the temporary assembly frame to which the inlet block and the outlet block are fixed. [Figure 5B]Figure 5A is a cross-sectional view taken along the line VB-VB. [Figure 6A] This is a front view showing a temporary frame with multiple connecting hoses attached to the inlet and outlet blocks. [Figure 6B] Figure 6A is a cross-sectional view taken along the line VIB-VIB. [Figure 7A] This is a lateral cross-sectional view showing the mold in a closed state. [Figure 7B] This is a plan view showing the mold in a closed state. [Figure 7C] Figure 7A is a cross-sectional view taken along the line VIIC-VIIC. [Figure 8] This is a cross-sectional view showing the process of opening the mold and attaching a temporary assembly frame to the inlet block and outlet block, to which multiple connecting hoses are attached. [Figure 9] This is a cross-sectional view showing the mold opened and a temporary assembly frame with multiple connecting hoses attached to the inlet and outlet blocks. [Figure 10] This is a cross-sectional view showing the temporary frame installed and clamped down. [Figure 11] This is a cross-sectional view showing the process of filling and molding with foamed resin. [Figure 12] This is a cross-sectional view showing the mold opening process. [Figure 13] This is a cross-sectional view showing the protrusion process. [Figure 14] This is a side view showing the temporary assembly frame after it has been removed from the mold. [Figure 15] This is a side view showing the resin manifold after it has been removed from the temporary assembly frame and the gate has been cut off. [Figure 16A] This is a side view showing the injection position in the case of a direct gate. [Figure 16B] This is a plan view showing the injection position in the case of a direct gate. [Figure 16C] Figure 16A is a cross-sectional view along the XVIC-XVIC line. [Figure 17A] This is a cross-sectional view showing the injection position in the case of a two-point pin gate. [Figure 17B] This is a plan view showing the injection position in the case of a two-point pin gate. [Figure 17C] Figure 17A is a cross-sectional view taken along the line XVIIC-XVIIC. [Figure 18A] This is a side cross-sectional view showing a temporary assembly frame including the adhesive connection part of the connecting hose. [Figure 18B] This is an enlarged cross-sectional view showing the portion of line XVIII. [Figure 18C] This is a cross-sectional view corresponding to Figure 18B when using the hose clamp method. [Modes for carrying out the invention]

[0017] Embodiments of the present invention will be described below with reference to the drawings.

[0018] -Construction of a resin manifold- Figures 1A to 1D show a resin manifold 1 according to an embodiment of the present invention, which has an inlet block 2 and an outlet block 3 spaced apart at the top and bottom.

[0019] As shown in Figures 2A to 2C, the inlet block 2 is a resin molded product having a plurality of fluid inlets 21 and inlet-side flow paths 22 communicating with the fluid inlets 21. The inlet block 2 has a rectangular parallelepiped inlet block body 20. For example, six fluid inlets 21 are opened in this inlet block body 20, and six tubular inlet-side connection parts 23 are formed to extend downward. In this embodiment, six inlet-side flow paths 22 are formed so as to communicate from each fluid inlet 21 to the inside of the inlet-side connection part 23. In this embodiment, the inlet block 2 has a circular cross-section water pump mounting recess 25 into which, for example, the cylindrical projection of a water pump of a device (not shown) to which a resin manifold 1 is attached fits. One of the fluid inlets 21 is formed in the center of this water pump mounting recess 25, and one of the fluid inlets 21 is also formed on the side wall of the water pump mounting recess 25. The side of the water pump mounting recess 25 constitutes, for example, a valve mounting portion 26, and four fluid inlets 21 are arranged in this valve mounting portion 26 to correspond to each port of the valve, but the configuration is not limited to these. For example, the valve mounting portion 26 may have eight inlets and outlets to correspond to each port of the octo valve. A continuous engagement recess 24 is formed on the inner peripheral edge of the lower end of the inlet block body 20.

[0020] As shown in Figures 3A to 3C, the outlet block 3 is a resin molded product having a plurality of fluid outlets 31 and outlet-side flow paths 32 communicating with the fluid outlets 31. The outlet block 3 has a rectangular parallelepiped outlet block body 30. For example, four fluid outlets 31 are opened in this outlet block body 30, and four tubular outlet-side connection parts 33 are formed to extend upward. Outlet-side flow paths 32 are formed to communicate from each fluid outlet 31 into the inside of the outlet-side connection part 33. Engaging recesses 34 are continuously formed on the inner peripheral edge of the upper end of the outlet block body 30.

[0021] The inlet block 2 and outlet block 3 may be made of polypropylene or polyamide, as they have chemical resistance to fluids such as coolant flowing through the resin manifold 1, as well as heat resistance to ambient temperature. Since the inlet block 2 and outlet block 3 are easily molded by injection molding, it is desirable that they have a simple shape with as few under-shapes as possible, so that they can be molded using a core or slide mold. In the case of small production volumes, they may be molded using a 3D printer. To increase strength, reinforcing fibers such as glass fibers may be blended into the molten resin during injection molding. Reinforcing fibers may be blended in an amount greater than 0% by weight and less than 60% by weight relative to 100% by weight of the base thermoplastic or thermosetting resin.

[0022] As shown by the dashed lines in Figure 1A, the inlet block 2 and the outlet block 3 are connected by multiple connecting hoses 4. The connecting hoses 4 may be made of polyethylene, nylon, or the like, from the viewpoint of having chemical resistance to fluids such as coolant that flow through the resin manifold 1, as well as heat resistance to ambient temperature. If the piping shape of the connecting hoses 4 becomes complex, it is desirable to use flexible hoses with a small minimum bending radius. From the viewpoint of preventing the connecting hoses 4 from partially melting due to the heat of the foamed resin during foam molding (described later), or from deforming inward due to the filling pressure of the molten foamed resin, fluoropolymer tubes with a high melting point, laminated tubes made by laminating multiple resins, or braided hoses with fiber reinforcement inside may be used as connecting hoses 4.

[0023] The connecting hose 4 connects two passages selected from the inlet passage 22 and the outlet passage 32 to communicate with each other. Specifically, four connecting hoses 4 connect the inlet passage 22 and the outlet passage 32 vertically. In this embodiment, one connecting hose 4 is connected to the inlet connection part 23 at both ends in an arc shape to match the configuration of the device to which the resin manifold 1 is attached, but the embodiment is not limited to this.

[0024] As shown in Figures 18A and 18B, the inlet-side connection portion 23 and the outlet-side connection portion 33 are formed with circumferentially continuous retaining protrusions 41, making it difficult for the connecting hose 4 to come loose. To further improve the retaining effect, adhesive 42 may be applied to the outer circumference of the inlet-side connection portion 23 and the outlet-side connection portion 33, or they may be tightened with hose clamps 43 as shown in Figure 18C.

[0025] The resin manifold 1 has a foamed resin section 5 integrally molded between the inlet block 2 and the outlet block 3 to cover a plurality of connecting hoses 4. The molten foamed resin 51 used to mold this foamed resin section 5 can be selected according to the ambient temperature, for example, from polypropylene or polyamide. Furthermore, reinforcing fibers such as glass fibers may be blended into the molten foamed resin 51 from the viewpoint of maintaining strength. Reinforcing fibers may be blended in an amount greater than 0% by weight and less than 60% by weight relative to 100% by weight of the base thermoplastic or thermosetting resin. In addition, other thermoplastic or thermosetting resins may be used depending on the environment in which they are used (oil, chemicals, light, etc.), temperature conditions, and load conditions.

[0026] In this embodiment, the resin manifold 1 is constructed with multiple connecting hoses 4 in the fluid flow path section. Therefore, it can have complex shapes where the connecting hoses 4 intersect, which cannot be formed by conventional split welding molding. Furthermore, since the connection portions between the multiple connecting hoses 4 and the inlet-side flow path 22 and the outlet-side flow path 32 are covered with foamed resin 50, the multiple connecting hoses 4 will not come loose.

[0027] Furthermore, in this embodiment, as will be described later, molding shrinkage occurs when the foamed resin part 5 is filled and shrinks, so the airtightness of the connection between the inlet side connection part 23 and the connecting hose 4 and the connection between the outlet side connection part 33 and the connecting hose 4 is improved.

[0028] The molten foamed resin 51 used to form the foamed resin part 5 contains reinforcing fibers in an amount greater than 0% by weight and less than 60% by weight relative to 100% of the resin component weight. As a result, the foamed resin part 5 is strengthened by the reinforcing fibers, improving the overall rigidity and strength of the resin manifold 1.

[0029] -Method for molding resin manifolds- Next, the operation of the molding method for the resin manifold 1 according to this embodiment will be described.

[0030] In the molding method for the resin manifold 1 of this embodiment, first, in the preparation step, as shown in Figures 2A to 3C, an inlet block 2 having a plurality of fluid inlets 21 and inlet-side flow paths 22 communicating with the fluid inlets 21, and an outlet block 3 having a plurality of fluid outlets 31 and outlet-side flow paths 32 communicating with the fluid outlets 31 are molded. Molding is preferably carried out by known injection molding. In the inlet block 2, the inlet-side flow paths 22 are orthogonal in shape, and some under-shapes exist, but this can be easily molded using a core or slide mold (not shown).

[0031] Furthermore, a temporary assembly frame 6, as shown in Figures 4A to 4C, is prepared. This temporary assembly frame 6 is formed to correspond to the shape of the device to which the resin manifold 1 will actually be attached. The temporary assembly frame 6 has a rectangular back plate 60, a pair of side plates 61, and a bottom plate 62. The temporary assembly frame 6 is mounted on the mold 7, and from the viewpoint of durability and heat resistance, it is preferable that it be made of metal. The back plate 60 has six fluid inlets 60a formed to correspond to the resin manifold 1, and two of the fluid inlets 60a are formed at the center and side of a cylindrical projection 63 that mimics the shape of the water pump of the device to be attached. In addition, a circulation channel 60c is formed in which a pair of fluid inlets 60a communicate internally in order to circulate fluid inside, in accordance with the valve to be attached. The bottom plate 62 has four fluid outlets 62a formed to correspond to the fluid outlet 31 of the resin manifold 1, and a circulation channel 62b is formed in which a pair of fluid outlets 62a communicate internally in order to circulate fluid inside.

[0032] Next, in the block mounting process, as shown in Figures 5A and 5B, the inlet block 2 and outlet block 3 are attached to the temporary assembly frame 6 with a gap between them. At this time, the fluid inlets 21 and 31 formed on the inlet block 2 and outlet block 3 are fitted into the fluid inlets 60a and 62a of the temporary assembly frame 6, respectively. At this time, the cylindrical projection 63 of the temporary assembly frame 6 fits into the recess 25 for mounting the water pump. O-rings 63a are attached to the outer circumference and front surface of the cylindrical projection 63 to prevent leakage even when water or air is passed through the connecting hose 4.

[0033] Next, in the hose connection process, as shown in Figures 6A and 6B, multiple connecting hoses 4 are connected so that the inlet-side flow path 22 and the outlet-side flow path 32 are in communication with each other. Specifically, four corresponding pairs of inlet-side connecting parts 23 and outlet-side connecting parts 33 are connected at the retaining protrusions 41 and their surroundings at the ends of each connecting hose 4. At this time, adhesive 42 as shown in Figure 18B or hose bands 43 as shown in Figure 18C may be used to ensure that the connection is not easily released. In this way, the inlet block 2, outlet block 3 and connecting hoses 4 are assembled as a unit on the temporary assembly frame 6.

[0034] Next, in the assembly process, the assembled temporary frame 6 is incorporated into the mold 7. The temporary frame 6, to which multiple connecting hoses 4 are connected, is fixed to the mold 7. As shown in Figures 7A to 7C, the mold 7 has a movable side mold body 70 into which the temporary frame 6 is fitted, a movable side mounting plate 71, and a fixed side mounting plate 72.

[0035] The movable mold body 70 has a central recess 70a with a rectangular cross-section into which the temporary assembly frame 6 is fitted, and fluid inlets and outlets 70b for communicating with a pair of fluid inlets 60a of the temporary assembly frame 6. From here, fluids such as compressed gas and water can be supplied into all the connecting hoses 4. The movable mold body 70 is provided with, for example, four ejection pin insertion holes 70c and four guide pins 70d, which allow for positioning with respect to the fixed mounting plate 72.

[0036] The ejector plate 71e and ejector receiving plate 71f are fitted with four ejector pins 71a and four return pins 71c with return springs 71b attached. Two spacer blocks 71d are placed between the movable mold body 70 and the movable mounting plate 71. When the ejector rod 82 of the molding machine pushes the ejector receiving plate 71f in the direction of the arrow in Figure 13, the ejector pins 71a advance, pushing the temporary assembly frame 6 forward. When the ejector rod 82 of the molding machine returns, the ejector plate 71e and ejector receiving plate 71f are returned by the return springs 71b, which in turn returns the ejector pins 71a.

[0037] The fixed-side mounting plate 72 is plate-shaped and covers the central recess 70a of the movable-side mold body 70 and its periphery, and is provided with a direct gate 72a in the center for injecting molten foam resin 51.

[0038] Then, as shown in Figure 8, after opening the movable mold body 70 by the mold opening mechanism, the temporary assembly frame 6 is fitted into its central recess 70a, as shown in Figure 9. At this time, since multiple connecting hoses 4 can be pre-connected to the inlet block 2 and outlet block 3 using the temporary assembly frame 6, the installation of the inlet block 2, outlet block 3 and connecting hoses 4 to the mold 7 is extremely easy.

[0039] Subsequently, as shown in Figure 10, the movable mold body 70 is closed again. In this state, compressed air or a fluid 81 consisting of water may be introduced through the fluid inlet / outlet 70b to increase the internal pressure of all connecting hoses 4.

[0040] Next, in the filling process, as shown in Figure 11, molten foamed resin 51 is filled into the cavity 80 formed between the mold 7 and the temporary assembly frame 6. In this embodiment, the molten foamed resin 51 is injected directly from the direct gate 72a and filled into the cavity 80.

[0041] Next, in the foaming process, the molten foamed resin 51 is foamed inside the cavity 80. At this time, the internal pressure of all the connecting hoses 4 is kept high by the fluid 81, so the connecting hoses 4 do not collapse inward even when injection pressure and foaming pressure are applied. Therefore, the connecting hoses 4 do not collapse inward and the flow path does not narrow. At this time, as shown in Figure 1E, molding shrinkage occurs when the foamed resin part 5 is filled and shrinks, so the airtightness of the connection between the inlet side connection part 23 and the connecting hose 4 and the connection between the outlet side connection part 33 and the connecting hose 4 is improved. Furthermore, since the foamed resin 5 fills into the upper and lower engaging recesses 24 and 34 and adheres tightly, the foamed resin 5 and the inlet block 2 and outlet block 3 maintain their shape more reliably.

[0042] Next, in the demolding process, the fluid 81 in the connecting hose 4 is drained and returned to approximately atmospheric pressure. Then, the movable mold body 70 is opened by opening the mold. At this time, the gate 52 is protruding at the position corresponding to the direct gate 72a.

[0043] Next, as shown in Figure 13, the ejector receiving plate 71f of the movable mold body 70 is pushed out in the direction of the arrow by the ejector rod 82, and the temporary assembly frame 6 is pushed out of the mold 7 by the ejector pin 71a.

[0044] Next, as shown in Figure 14, the resin manifold 1 is removed from the temporary assembly frame 6, which is integrated with the resin manifold 1, and the gate 52 is cut. This results in the molding of the resin manifold 1, as shown in Figure 15.

[0045] In this embodiment, the fluid flow path is composed of multiple connecting hoses 4 separate from the inlet block 2 and outlet block 3, making it possible to mold a resin manifold 1 with a complex shape that cannot be formed by conventional split welding.

[0046] After molding, the connection points between the multiple connecting hoses 4 and the inlet-side flow path 22 and outlet-side flow path 32 are covered with foamed resin 50, so that the multiple connecting hoses 4 do not come off, and the multiple connecting hoses 4 are protected by the foamed resin 50.

[0047] Therefore, according to the molding method for the resin manifold 1 of this embodiment, a resin manifold 1 with a complex shape that cannot be molded by conventional molding by split welding can be obtained.

[0048] -Variations- Figures 17A to 17C show modified embodiments of the present invention, which differ from the above embodiment in that the configuration of the molding gate in the mold 7' is different. In these modified embodiments, the same reference numerals are used for parts that are the same as in Figures 1A to 16C, and their detailed descriptions are omitted.

[0049] In this modified example, as is clear from Figure 17C, a pair of pin gates 72a' are arranged in the mold 7' so that the molten foamed resin 51 does not come into direct contact with the multiple connecting hoses 4.

[0050] The mold 7' is a so-called three-plate mold, consisting of three fixed-side mounting plates 72', with a pair of pin gates 72a' positioned on the left and right sides with a gap between them.

[0051] Therefore, when the molten foamed resin 51 is injected from the pair of pin gates 72a' during the filling process, the molten foamed resin 51 does not directly hit any of the connecting hoses 4, but only collides with the back plate 60 of the rigid temporary frame 6. As a result, excessive pressure is not applied to the connecting hoses 4 when the molten foamed resin 51 is filled, and the connecting hoses 4 do not collapse inward, preventing the flow path from narrowing.

[0052] Therefore, as in the above embodiment, it is no longer necessary to fill the inside of the connecting hose 4 with fluid 81 to increase the internal pressure, and it is possible to simplify the configuration of the temporary assembly frame 6 and the mold 7'.

[0053] (Other embodiments) The present invention may also have the following configuration in the above embodiment.

[0054] In other words, in the above embodiment, the inlet-side flow path 22 and the outlet-side flow path 32 are connected by five connecting hoses 4, but this is not limited to this, and there may be four or fewer hoses, or six or more hoses.

[0055] The resin manifold 1 is generally shaped like a rectangular parallelepiped, but is not limited to this, and may have shapes such as cylindrical or prismatic.

[0056] In the above embodiment, the resin manifold includes one inlet block 2 and one outlet block 3, but there may be multiple inlet blocks 2 or outlet blocks 3, or multiple inlet blocks 2 and outlet blocks 3, and the number of connecting hoses 4 should be determined accordingly.

[0057] The embodiments described above are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or uses. [Explanation of Symbols]

[0058] 1. Resin manifold 2 Entrance Block 3. Exit Block 4. Connection hoses 5. Foamed resin part 6. Temporary assembly frame 7,7' mold 20 Entrance block main body 21 Fluid inlet 22 Inlet side flow path 23 Inlet side connection 24 Engaging recess 25 Recess for water pump mounting 26 Valve mounting section 3. Exit Block 30 Exit block body 31 Fluid outlet 32 Outlet side flow path 33 Outlet side connection 34 Engaging recess 4. Connection hoses 41 Retaining protrusions 42 Adhesives 43 Hose clamp 5. Foamed resin part 50 Foamed resin 51 Molten foamed resin Gate 52 6. Temporary assembly frame 60 Back plate 60a Fluid inlet 60c circulation channel 61 Side plate 62 Bottom plate 62a Fluid outlet 62b Circulation channel 63 Cylindrical projection 63a O-ring 7,7' mold 70 Movable side mold body 70a Central recess 70b Fluid inlet / outlet 70c Extrusion pin insertion hole 70d guide pin 71 Movable side mounting plate 71a Ejector pin 71b Return spring 71c return pin 71d Spacer Block 71e Ejector Plate 71f Ejector receiving plate 72,72' Fixed side mounting plate 72a Direct gate 72a' Pin gate 72b Locating Ring 80 Cavity 81 Fluid 82 Extrusion Rod

Claims

1. A plurality of fluid inlets and at least one inlet block having an inlet-side flow path communicating with the fluid inlets, and a plurality of fluid outlets and at least one outlet block having an outlet-side flow path communicating with the fluid outlets are formed, The at least one inlet block and the at least one outlet block are attached at intervals to a temporary assembly frame corresponding to the shape of the device on which the resin manifold is installed. Multiple connecting hoses are connected to each other so that the inlet side flow path and the outlet side flow path are in communication with each other. The temporary assembly frame to which the multiple connecting hoses are connected is fixed to the mold. The cavity formed between the mold and the temporary assembly frame is filled with foamed resin. The foamed resin is foamed inside the cavity. After molding, remove the temporary assembly frame from the mold. Remove the resin manifold from the aforementioned temporary frame. A method for molding a resin manifold, characterized by the features described herein.

2. When foaming the aforementioned foamed resin, fluid is filled inside the multiple connecting hoses to prevent them from deforming inward. The method for molding a resin manifold according to feature 1.

3. The mold has a pin gate formed in it for filling with the foamed resin. The foamed resin is injected from the pin gate so that it does not directly come into contact with the plurality of connecting hoses. A method for molding a resin manifold according to claim 1 or 2, characterized by the above.

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