WO2015178207A1 - 発泡成形体 - Google Patents
発泡成形体 Download PDFInfo
- Publication number
- WO2015178207A1 WO2015178207A1 PCT/JP2015/063196 JP2015063196W WO2015178207A1 WO 2015178207 A1 WO2015178207 A1 WO 2015178207A1 JP 2015063196 W JP2015063196 W JP 2015063196W WO 2015178207 A1 WO2015178207 A1 WO 2015178207A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thickness
- instrument panel
- plate
- panel duct
- flange
- Prior art date
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Images
Classifications
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
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- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
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- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06905—Using combined techniques for making the preform
- B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/58—Blowing means
- B29C49/60—Blow-needles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3032—Air inlets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00564—Details of ducts or cables of air ducts
Definitions
- the present invention relates to a foamed molded body molded from a foamed resin in a molten state, and more particularly to a foamed molded body in which a plate-like portion such as a flange portion for connecting to another member is connected to a pipe body.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2013-63639.
- the duct for ventilating the air from the air conditioner can be realized by using a tubular foamed molded article, which is excellent in heat insulation and lightweight. Furthermore, such a duct is more effective because it can improve heat insulation and weight reduction by increasing the foaming ratio at the time of molding and increasing the number of bubbles inside the foam.
- the tubular foamed molded body is formed by clamping a foamed resin 200 in a molten state with a predetermined pressing force Z using divided molds 201 a and 201 b.
- the foamed resin 200 of a molten state is pressed to cavity 202a, 202b with a predetermined blow pressure.
- the portion that becomes the plate-like portion Y8 such as the flange portion is compressed with the molten foamed resin 200 and pressed in the thickness direction of the plate-like portion Y8 with a predetermined pressing force Z, and the divided molds 201a and 201b are pressed. Compression to a thickness T between the cavities 202a and 202b.
- a plate-like portion Y8 such as a flange portion
- a tube main body X8 such as a duct
- a desired structure is provided so that the plate-like portion Y8 is securely connected to other members.
- the plate-shaped portion Y8 is pressed during mold clamping by the divided molds 201a and 201b, and the bubbles in the foamed resin of the plate-shaped portion Y8 are crushed.
- the inside of the tube main body X8 has a hollow portion and a space is vacant, as shown in FIG. 2, if the plate-like portion Y8 is pressed too much, the bubbles in the foamed resin of the plate-like portion Y8 become molds. It moves toward the tube body X8 by the pressing force Z due to tightening. For this reason, as a result of clamping by the divided molds 201a and 201b, the bubbles move to the portion of the tube main body X8 where the plate-like portions Y8 are connected, and it becomes easy for many bubbles to gather in the portion of the tube main body X8. As a result, a balloon-shaped bubble 81 may be formed inside the tube body X8 where the plate-like portions Y8 are connected.
- the inner shape of the tube main body X8 is different from the design. As a result, the flow efficiency of the fluid passing through the inside is lowered. Moreover, abnormal noise and vibration will be caused. Balloon-shaped bubbles 81 are generated regardless of whether the expansion ratio is low or high.
- the pressing force Z to the plate-like portion Y8 is weakened during the clamping with the divided molds 201a and 201b,
- the thickness T between the cavities 202a and 202b of the split molds 201a and 201b shown in FIG. 1 may be increased so that the bubbles do not move to the portion of the tube main body X8 where the plate-like portions Y8 are connected.
- the pressing force Z applied to the plate-like portion Y8 is weakened, or the thickness T between the cavities 202a and 202b is increased to compress the molten foamed resin 200 as shown in FIG.
- the foamed resins 200 constituting the portion Y8 are welded together, the foamed resins 200 constituting the plate-like portion Y8 are not welded in a desired welded state.
- the inner surface of the portion where the plate-like portion Y8 is connected in the tube main body X8 is torn by the blow pressure P, and the plate is formed from the inner surface side of the tube main body X8.
- a gap 82 may be formed between the foamed resins 200 toward the shaped portion Y8.
- the gap 82 shown in FIG. 4 also occurs when the foamed resin 200 in the portion constituting the plate-like portion Y8 is molded and contracted.
- the inner shape of the tube main body X8 is different from the design as in the balloon-shaped bubble 81 shown in FIG. As a result, the flow efficiency of the fluid passing through the inside is reduced. Moreover, abnormal noise and vibration will be caused.
- a cavity 83 may be formed.
- the cavity 83 generated inside the plate-shaped portion Y8 is formed in a state where the foamed resins 200 are not welded together, or the foamed resins 200 are once welded, and then the foamed resins 200 are partially peeled off. It is formed by. Since the balloon-shaped bubble 81 shown in FIG. 2 and the gap 82 shown in FIG. 4 are not generated on the inner surface of the tube main body X8 shown in FIG. 5, the flow rate efficiency of the fluid passing through the inside may be reduced. There is no problem causing sound or vibration.
- the plate-like portion Y8 is a portion connected to another member, a through-hole for inserting a bolt or the like is formed in the plate-like portion Y8, and the bolt or the like is passed through the through-hole and tightened with a nut. Will be connected to other members. For this reason, when the cavity 83 is generated at the location where the through hole is formed, the strength around the through hole is weakened, or rattling occurs when the plate-like portion Y8 is connected to another member. Will do. The problem that the strength around the through-holes decreases and the backlash occurs also occurs when the gap 82 shown in FIG. 4 is formed.
- the cavity 83 formed in the state in which the foamed resins 200 are not welded is generated inside the plate-like portion Y8 by pushing the plate-like portion Y8 during production. It is also possible to do. However, the cavity 83 formed by once the foamed resins 200 are welded and then partly peeled off from each other is formed on the plate-like portion Y8 even if the plate-like portion Y8 is pressed during production. It is difficult to determine that the cavity 83 is generated inside.
- the balloon-shaped bubble 81 shown in FIG. 2 or the gap 82 shown in FIG. 4 is generated, the balloon-shaped bubble 81 and the gap 82 are generated by inspecting the inner surface of the tube main body X8. Defective product can be removed.
- the cavity 83 shown in FIG. 5 is formed inside the plate-like portion Y8, it cannot be found even when the inner surface of the tube main body X8 is inspected. For this reason, it is necessary to mold a foam molded body in which the cavity 83 shown in FIG. 5 is not formed inside the plate-like portion Y8.
- the hollow portion 84 of the tube main body X8 is integrally communicated between the plate-like portions Y8.
- the hollow portion 85 is formed between the plate-like portions Y8, it is difficult to give the plate-like portion Y8 a predetermined structural strength.
- the plate-like portion Y8 is dented and it is difficult to form a through hole.
- the hollow portion 85 of the plate-like portion Y8 communicates integrally with the hollow portion 84 of the tube main body X8, if a through hole is formed in the plate-like portion Y8, the air inside the tube main body X8 escapes from the through hole. May end up.
- Patent Document 1 a concave portion is formed in the vicinity of the connecting surface of the plate-like portion with the tube body, and the bubbles to the tube body portion Is prevented from occurring, and the generation of balloon-shaped bubbles 81 is prevented.
- Patent Document 1 it is necessary to form a recess in the vicinity of the connecting surface with the pipe body in the plate-like portion. Further, the method of Patent Document 1 is intended to prevent the generation of balloon-shaped bubbles 81, and is not intended to prevent the generation of the gap 82 shown in FIG. 4 or the generation of the cavity 83 shown in FIG. It is not considered.
- An object of the present invention is to provide a foamed molded article having a tube main body and a plate-like portion connected to the outside of the tube main body, in which no cavity is generated inside the plate-like portion. It is in.
- the foamed molded product according to the present invention is A foam molded body having a tube body and a plate-like portion connected to the outside of the tube body,
- the foaming ratio of the foamed molded product is less than 2 times,
- the value of the thickness B / the thickness A which is the relationship between the thickness A around the portion where the plate-like portions of the pipe body are connected, and the thickness B of the plate-like portion is 2.82. It is characterized by being less than.
- the foamed molded product according to the present invention is A foam molded body having a tube body and a plate-like portion connected to the outside of the tube body,
- the foaming ratio of the foamed molded product is 2 times or more,
- the value of the thickness B / the thickness A which is the relationship between the thickness A around the portion where the plate-like portions of the pipe body are connected, and the thickness B of the plate-like portion is 2.88. It is characterized by being less than.
- FIG. 9 is a cross-sectional view taken along the line D-D ′ of FIG. 8. It is a 1st figure which shows the example of a shaping
- FIGS. 7 to 9 are diagrams showing a configuration example of the foam molded body 1 according to one embodiment of the present invention.
- the foam molded body 1 is a foam molded body having a tube body X1 and a plate-like portion Y1 connected to the outside of the tube body X1.
- the thickness A around the portion where the plate-like portions Y1 in the tube body X1 are connected when the foaming ratio of the foam molded body 1 is less than 2, the thickness A around the portion where the plate-like portions Y1 in the tube body X1 are connected, The thickness B / thickness A which is the relationship with the thickness B of the plate-like portion Y1 is less than 2.82.
- the thickness A around the portion where the plate-like portion Y1 is connected in the tube body X1 and the thickness B of the plate-like portion Y1 are:
- the value of thickness B / thickness A, which is the relationship, is less than 2.88.
- the foam molded body 1 When the expansion ratio of the foam molded body 1 is less than 2 times, the foam molded body 1 according to one aspect of the present invention has a thickness B / thickness A value of less than 2.82. When the foaming ratio is 2 times or more, the value of the thickness B / thickness A is less than 2.88, so that a cavity 83 is generated inside the plate-like portion as shown in FIG. It is possible to obtain a foamed molded body 1 having no surface. Moreover, as shown in FIG. 4, the foaming molding 1 with which the clearance gap 82 does not generate
- an embodiment of a foamed molded product 1 according to one aspect of the present invention will be described in detail with reference to the accompanying drawings. In the following embodiment, the instrument panel duct 1 will be described as an example of the foam molded body 1.
- FIG. 7 is a schematic plan view of the instrument panel duct 1 and shows the instrument panel duct 1 on the side having the supply unit 105 for connection to an air conditioner unit (not shown).
- 8 is a schematic plan view of the periphery of the fitting portion 102d shown in FIG. 7, and
- FIG. 9 is a cross-sectional view taken along the line DD ′ of FIG.
- the instrument panel duct 1 of the present embodiment is a lightweight instrument panel duct 1 for circulating cool and warm air supplied from an air conditioner unit to a desired part.
- the instrument panel duct 1 of the present embodiment is made of a polypropylene resin, and is preferably composed of a blend resin obtained by mixing 1 to 20 wt% of a polyethylene resin and / or 5 to 40 wt% of a hydrogenated styrene thermoplastic elastomer. .
- the tensile fracture elongation at ⁇ 10 ° C. is 40% or more and the tensile elastic modulus at room temperature is 1000 kg / cm 2 or more. Further, the tensile fracture elongation at ⁇ 10 ° C. is preferably 100% or more.
- the terms used in this embodiment are defined below.
- Foaming ratio A value obtained by dividing the density of the foamed resin used in the molding method of the present embodiment, which will be described later, by the apparent density in the tube body X1 (see FIG. 9) of the instrument panel duct 1 obtained by the molding method of the present embodiment. The expansion ratio was taken.
- Tensile elongation at break After cutting out the tube main body X1 of the instrument panel duct 1 obtained by the molding method of this embodiment described later, and storing at -10 ° C, the tensile speed is 50 mm as a No. 2 type test piece according to JIS K-7113. The value measured at / min was taken as the tensile elongation at break.
- Tensile elastic modulus The tube body X1 of the instrument panel duct 1 obtained by the molding method of this embodiment described later is cut out and pulled at a normal temperature (for example, 23 ° C.) as a No. 2 type test piece according to JIS K-7113. Was measured at 50 mm / min as the tensile modulus.
- a supply unit 105 for connection to an air conditioner unit is provided at one end of the pipe unit 101 (101a to 101d). Further, the fitting part 102 (102a to 102d) is provided at the other end of the pipe part 101 (101a to 101d). Further, a flange portion 103 (103a to 103g) is connected to a tube main body X1 (see FIG. 9) composed of the tube portion 101 (101a to 101d), the supply portion 105, and the fitting portion 102 (102a to 102d). .
- the instrument panel duct 1 of the present embodiment has a closed cell structure (for example, a closed cell rate of 70% or more) having a foaming ratio of 1.3 times or more and a plurality of bubbles.
- the average thickness of the instrument panel duct 1 is 0.5 mm or more.
- the average thickness means an average value of the thickness measured at equal intervals of about 100 mm in the hollow drawing direction of the molded product. If it is a hollow molded product, measure the wall thickness in the direction of the 90 ° direction of each part of the two wall parts welded via the parting line, and mean the average value of the measured thickness To do. However, the above-described flange portion 103 and the like are not included in the measurement position.
- the inner side of the pipe body X1 is configured to have a flow path through which the fluid flows, so that the cool and warm air of the air conditioner unit can be circulated.
- the flow path of the fluid supplied to the inside of the tube main body X1 from the opening 111 of the supply section 105 is divided into four paths, a, b-1, b-2, and c, as shown in FIG.
- the fluid supplied to the inside of the tube main body X1 from the opening 111 of the supply unit 105 flows out from the opening of the fitting portion 102a in the flow path a.
- the liquid flows out from the opening of the fitting portion 102b.
- the flow path b-2 it flows out from the opening of the fitting portion 102c.
- the flow path c it flows out from the opening part of the fitting part 102d.
- a supply portion 105 is provided at one end of the tube portion 101a, and a fitting portion 102a is provided at the other end.
- flange portions 103a and 103e are connected to a tube main body X1 including the tube portion 101a, the supply portion 105, and the fitting portion 102a.
- the flange portion 103a is provided with a fixing hole 107a for fixing to another tubular member connected by the fitting portion 102a.
- the instrument panel duct 1 can be fixed to another tubular member by passing a bolt (not shown) through the fixing hole 107a and tightening it with a nut.
- a fixing hole 107e is also formed in the flange portion 103e.
- a supply part 105 is provided at one end of the pipe part 101b, and a fitting part 102b is provided at the other end. Further, the flange portion 103b is connected to the tube main body X1 including the tube portion 101b, the supply portion 105, and the fitting portion 102b. The flange portion 103b is provided with a fixing hole 107b for fixing to another tubular member connected by the fitting portion 102b.
- a bridging portion 104e for maintaining strength is connected to each of the pipe portions 101a and 101b at a portion where the distance between the pipe portions 101a and 101b is narrow.
- the configuration around the channel b-2 in the instrument panel duct 1 is the same as the configuration around the channel b-1.
- the configuration around the flow path c in the instrument panel duct 1 is similar to the configuration around the flow path a described above.
- a flange part 103g is provided so as to be connected to the pipe parts 101b and 101c.
- a fixing hole 107g is also formed in the flange portion 103g.
- flange portions 103 are connected to the outside of the tube main body X1 (see FIG. 9).
- the tube main body X1 means a portion composed of the tube portion 101 (101a to 101d), the supply portion 105, and the fitting portion 102 (102a to 102d).
- the thickness A around the portion where the plate-like portion Y1 in the tube body X1 is connected, and the plate The thickness B / thickness A, which is the relationship with the thickness B of the shaped portion Y1, is greater than 1.40 and less than 2.82.
- the value of wall thickness B / wall thickness A is 1.40 or less, there is a sign that balloon-shaped bubbles 81 shown in FIG. 2 are generated when the instrument panel duct 1 having a foaming ratio of less than 2 is formed. This is because a balloon-shaped bubble 81 is generated.
- the value of thickness B / thickness A is 2.82 or more, the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. 5 are generated inside the plate-like portion Y1.
- the wall thickness A is a wall thickness within a range L1 of 5 mm from the location ⁇ where the plate-like portions Y1 are connected in the tube body X1.
- the thickness B is the thickness in the thickness direction of the plate-like portion Y1.
- the instrument panel duct 1 of the present embodiment is configured so that the value of the thickness B / thickness A is greater than 1.46 and less than 2.88 when the expansion ratio is 2 times or more. This is because when the value of wall thickness B / wall thickness A is 1.46 or less, there is a sign that balloon-shaped bubbles 81 shown in FIG. This is because a balloon-shaped bubble 81 is generated. Further, when the value of wall thickness B / wall thickness A is 2.88 or more, the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. 5 are generated inside the plate-like portion Y1.
- the instrument panel duct 1 of the present embodiment is configured such that the value of thickness B / thickness A is greater than 1.40 and less than 2.82, and the expansion ratio is 2 times.
- the thickness B / thickness A has a value greater than 1.46 and less than 2.88.
- the plate-like portion Y1 of the instrument panel duct 1 is a portion connected to other members, the plate-like portion Y1 has a desired structural strength.
- the value of wall thickness B / wall thickness A is preferably 1.80 or more, and more preferably 2.0 or more. Accordingly, the thickness B can be increased with respect to the thickness A, and the plate-like portion Y1 can have a desired structural strength.
- the thickness B is preferably designed to be 4.0 mm or more.
- the opening area of the opening part 100 of the fitting part 102 is made larger than the opening area of the pipe part 101.
- the opening area of the pipe part 101 means the area of the opening part of the pipe part 101 cut in the direction orthogonal to the flow path traveling direction of the instrument panel duct 1 at the location of the pipe part 101.
- the shape of the fitting part 102 can be realized by a trumpet shape.
- the trumpet shape refers to a shape in which the opening area increases toward the opening end.
- FIG. 10 is a view showing the open state of the split mold
- FIG. 11 is a view showing the closed state of the split mold from the side of the split mold
- FIG. 12 is a view showing the closed state of the split mold from the contact surface of the two split molds to the split mold 12a side.
- the foam parison is injected from the annular die 11, and the cylindrical foam parison 13 is pushed out between the divided molds 12a and 12b.
- the divided molds 12a and 12b are clamped, and the foam parison 13 is sandwiched between the divided molds 12a and 12b as shown in FIG. Thereby, the foam parison 13 is accommodated in the cavities 10a and 10b of the divided molds 12a and 12b.
- the blowing needle 14 and the blowing needle 15 are passed through predetermined holes provided in the divided molds 12a and 12b. And pierce the foam parison 13 simultaneously.
- a compressed gas such as air is blown from the blowing needle 14 into the foamed parison 13 and the blowing needle 15 passes through the inside of the foamed parison 13. Compressed gas is blown out of the tube, and blow molding is performed at a predetermined blow pressure.
- the blowing needle 14 is pierced into a position corresponding to the opening 111 of the supply unit 105 of the instrument panel duct 1 shown in FIG. 7 and forms a blowing port for blowing compressed gas into the inside of the foam parison 13.
- the blowing needle 15 is pierced into a position corresponding to each of the openings 100 (100a to 100d) of the fitting portions 102 (102a to 102d) of the instrument panel duct 1 shown in FIG. A blowout opening is formed for blowing out.
- the compressed gas can be blown into the inside of the foam parison 13 from the blow needle 14, the compressed gas can be blown out from the blow needle 15 through the inside of the foam parison 13, and blow molding can be performed with a predetermined blow pressure.
- the blow pressure is set at 0.5 to 3.0 kg / cm 2 , preferably 0.5 to 1.0 kg / cm 2 . If the blow pressure is set to 3.0 kg / cm 2 or more, the thickness of the foamed parison 13 is likely to be crushed or the foaming ratio is likely to be reduced. If the blow pressure is set to 0.5 kg / cm 2 or less, it may be difficult to adjust the differential pressure between the regulator 16 and the exhaust pressure regulator 17. For this reason, the blow pressure is set at 0.5 to 3.0 kg / cm 2 , preferably 0.5 to 1.0 kg / cm 2 .
- compressed gas is blown into the foam parison 13 from the blow needle 14 and exhaust is performed from the cavities 10a and 10b of the split molds 12a and 12b, and a gap between the foam parison 13 and the cavities 10a and 10b is formed. Eliminate and let negative pressure. As a result, a pressure difference is set between the inside and outside of the foam parison 13 housed in the cavities 10a and 10b inside the split molds 12a and 12b (the inside of the foam parison 13 means a higher pressure than the outside), and the foam parison 13 Is pressed against the wall surfaces of the cavities 10a and 10b.
- the step of blowing compressed gas into the foam parison 13 and the step of generating a negative pressure outside the foam parison 13 do not need to be performed at the same time, and the steps are shifted in time. It is also possible to do this.
- the foam parison 13 is clamped with the pressing force Z by the divided molds 12a and 12b. Therefore, as described above, the portion of the foam parison 13 that becomes the tube main body X1 is pressed against the cavities 10a and 10b by a predetermined blow pressure, and the flange portions 103 (103a to 103g) and the bridging portions 104 (104e and 104f) are pressed. The portion to be the plate-like portion Y1 is pressed in the thickness direction and compressed to the thickness T between the cavities 10a and 10b of the divided molds 12a and 12b.
- the compressed gas such as air
- the compressed gas from the blow needle 15 passes through the inside of the foam parison 13. Blow out.
- the foam parison 13 is pressed against the cavities 10a and 10b by a predetermined blow pressure for a predetermined time, and about 50 to 80% of the foam parison 13 is cooled and solidified from the cavities 10a and 10b in the thickness direction of the tube body X1. .
- the remaining foamed parison 13 in the molten state is naturally solidified with the molds clamped by the divided molds 12a and 12b.
- the temperature of the compressed gas supplied for cooling from the blowing needle 14 into the foamed parison 13 is preferably set to 10 ° C. to 30 ° C. and set to room temperature (for example, 23 ° C.).
- room temperature for example, 23 ° C.
- the cooling time of the instrument panel duct 1 can be shortened.
- the cooling time by the compressed gas is preferably 35 seconds or less.
- the foam parison 13 is cooled and solidified from the cavities 10a and 10b in the thickness direction of the tube body X1, and the foam parison 13 on the inner surface side of the tube body X1 can be left in a molten state. it can. Thereafter, the remaining foamed parison 13 in the molten state can be naturally solidified without being cooled by the compressed gas and being clamped by the divided molds 12a and 12b.
- polypropylene resin applicable when molding the instrument panel duct 1 of this embodiment, polypropylene having a melt tension at 230 ° C. in the range of 30 to 350 mN is preferable.
- the polypropylene resin is preferably a propylene homopolymer having a long-chain branched structure, and more preferably an ethylene-propylene block copolymer is added.
- the hydrogenated styrene thermoplastic elastomer blended with the polypropylene resin is preferably 5 to 40 wt% with respect to the polypropylene resin in order to improve impact resistance and maintain the rigidity as the instrument panel duct 1. Is preferably added in the range of 15 to 30 wt%.
- a hydrogenated polymer such as a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, or a styrene-butadiene random copolymer is used.
- the hydrogenated styrene thermoplastic elastomer has a styrene content of less than 30 wt%, preferably less than 20 wt%, MFR at 230 ° C. (MFR is a test temperature of 230 ° C. according to JIS K-7210, (Measured under a load of 2.16 kg) is 10 g / 10 min or less, preferably 5.0 g / 10 min or less and 1.0 g / 10 min or more.
- the polyolefin polymer blended with the polypropylene resin is preferably a low density ethylene- ⁇ -olefin, and is preferably blended in the range of 1 to 20 wt%.
- the low-density ethylene- ⁇ -olefin is preferably one having a density of 0.91 g / cm 3 or less, and ethylene- ⁇ -olefin obtained by copolymerizing ethylene and an ⁇ -olefin having 3 to 20 carbon atoms.
- Olefin copolymers are preferred and include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-dodecene, 4-methyl-1-pentene. 4-methyl-1-hexene and the like, and 1-butene, 1-hexene, 1-octene and the like are particularly preferable.
- the ⁇ -olefin having 3 to 20 carbon atoms may be used alone or in combination of two or more.
- the content of monomer units based on ethylene in the ethylene- ⁇ -olefin copolymer is preferably in the range of 50 to 99 wt% with respect to the ethylene- ⁇ -olefin copolymer.
- the content of the monomer unit based on ⁇ -olefin is preferably in the range of 1 to 50 wt% with respect to the ethylene- ⁇ -olefin copolymer.
- the foamed resin used when molding the instrument panel duct 1 can also be formed by using a pulverized material obtained by pulverizing burrs generated when molding the instrument panel duct 1. In this case, it is preferable to form the foamed resin by melt-kneading the pulverized material and the virgin material, rather than forming the foamed resin with 100% of the pulverized material.
- the virgin material is an unused resin, and in the present embodiment, the above-described polyethylene-based resin is used. By using the virgin material, it is possible to avoid deterioration of the resin constituting the instrument panel duct 1.
- the pulverized material and the virgin material are melt-kneaded to form the foamed resin, for example, the pulverized material and the virgin material are melt-kneaded at a ratio of 90% and virgin material.
- examples of the foaming agent that can be applied when the instrument panel duct 1 of the present embodiment is molded include a physical foaming agent, a chemical foaming agent, and a mixture thereof.
- Physical foaming agents include inorganic physical foaming agents such as air, carbon dioxide, nitrogen gas, and water, organic physical foaming agents such as butane, pentane, hexane, dichloromethane, dichloroethane, and their supercritical fluids. Can be applied.
- the supercritical fluid is preferably prepared using carbon dioxide, nitrogen, or the like. If nitrogen, the critical temperature is -149.1 ° C., the critical pressure is 3.4 MPa or more, and if carbon dioxide, the critical temperature is 31. It can be created by setting the critical pressure to 7.4 MPa or higher.
- the molded instrument panel 1 is taken out from the divided molds 12a and 12b. Specifically, the split molds 12a and 12b are opened in a state where a burr formed on the upper part of the instrument panel duct 1 is gripped by a predetermined machine (a clip or the like), and the instrument panel duct 1 is opened between the split molds 12a and 12b. Take out.
- a predetermined machine a clip or the like
- the instrument panel duct 1 of the present embodiment includes all the opening portions 100 (100 a to 100 d) formed in the fitting portions 102 (102 a to 102 d) and the supply portion 105 constituting the tube main body X 1.
- a flange portion 103 (103a to 103g) and a bridging portion 104 (104e, 104f) are provided in the vicinity of 111.
- the instrument panel duct 1 of this embodiment can fix the instrument panel duct 1 to other tubular members around the openings 100 and 111. Further, the strength around the openings 100 and 111 can be strengthened.
- the instrument panel duct 1 as the embodiment described above can be molded by the molding method shown in FIG. 14, for example.
- the molding method shown in FIG. 14 replaces the molding of the cylindrical foamed parison 13 between the divided molds 12a and 12b by the molding method described above, and replaces the molded foam resin between the divided molds 12a and 12b. It is extruded and molded.
- a molding apparatus used in another molding method includes two extrusion apparatuses 50a and 50b and split molds 12a and 12b similar to the above-described molding method examples. .
- the extrusion apparatus 50 (50a, 50b) is a predetermined interval between the divided molds 12a, 12b, and the resin sheets P1, P2 made of a foamed resin in a molten state, using the same material as the foam parison 13 in the above-described molding method example. It is arranged so that it hangs down substantially in parallel. Adjustment rollers 30a and 30b are disposed below the T dies 28a and 28b for pushing out the resin sheets P1 and P2, and the thicknesses and the like are adjusted by the adjustment rollers 30a and 30b. The resin sheets P1 and P2 thus extruded are sandwiched between the molds 12a and 12b, and are clamped and molded.
- the extrusion apparatus 50 includes a cylinder 22 provided with a hopper 21, a screw (not shown) provided in the cylinder 22, a hydraulic motor 20 connected to the screw, an accumulator 24 in which the cylinder 22 communicates with the inside, A plunger 26 provided in the accumulator 24, a T die 28, and a pair of adjusting rollers 30 are provided.
- the resin pellets introduced from the hopper 21 are melted and kneaded by rotation of the screw by the hydraulic motor 20 in the cylinder 22, and the foamed resin in the molten state is transferred to the accumulator 24 and stored in a certain amount, and driven by the plunger 26.
- the foamed resin is sent toward the T die 28.
- a continuous resin sheet made of a foamed resin in a molten state is pushed out and sent downward while being pinched by a pair of adjusting rollers 30 arranged at intervals. It hangs down between the split molds 12a and 12b.
- the T die 28 is provided with a die bolt 29 for adjusting the slit interval of the extrusion slit.
- the slit interval adjusting mechanism may include various other known adjusting mechanisms.
- the resin sheets P1 and P2 having bubble cells inside are extruded from the extrusion slits of the two T dies 28a and 28b, and are adjusted to have a uniform thickness in the vertical direction (meaning the extrusion direction). And is suspended between the divided molds 12a and 12b.
- the divided molds 12a and 12b are advanced in the horizontal direction, and a mold frame (not shown) located on the outer periphery of the divided molds 12a and 12b. Is closely attached to the resin sheets P1 and P2. After the resin sheets P1 and P2 are thus held by the molds on the outer periphery of the divided molds 12a and 12b, the resin sheets P1 and P2 are vacuum-sucked into the cavities 10a and 10b of the divided molds 12a and 12b. Each P2 is shaped along the cavities 10a and 10b.
- the divided molds 12a and 12b are advanced in the horizontal direction and clamped, and the blowing needle 14 and the blowing needle 15 are pierced into the resin sheets P1 and P2 and air is blown from the blowing needle 14 in the same manner as the molding method described above. Or the like is blown into the resin sheets P1 and P2, and the compressed gas is blown out from the blowing needle 15 via the resin sheets P1 and P2. In this way, the inside of the part which becomes the pipe body X1 of the instrument panel duct 1 is cooled.
- the split molds 12a and 12b are moved backward in the horizontal direction, and the split molds 12a and 12b are released from the instrument panel duct 1.
- the resin sheets P1 and P2 suspended between the pair of split molds 12a and 12b have a resin sheet thickness and an extrusion speed in order to prevent variations in thickness due to drawdown, neck-in, and the like. It is necessary to individually adjust the thickness distribution in the extrusion direction. Various adjustments such as the thickness of the resin sheet, the extrusion speed, and the thickness in the extrusion direction may be used.
- the instrument panel duct 1 in the present embodiment can be suitably molded by the other molding method examples shown in FIG. 14 as well as the molding method described in FIGS. Further, in another example of the molding method shown in FIG. 14, the instrument panel duct 1 corresponding to various conditions is molded by making the materials, foaming magnifications, wall thicknesses, etc. of the two resin sheets P1, P2 different. It is also possible.
- Example 1 In this example, as the raw material resin for the instrument panel duct 1, a foamed parison prepared using the following raw material blend was used, and a foam blow molding machine equipped with a screw type extruder having a gas supply port in a cylinder was used. Nitrogen supercritical fluid was further added, and the instrument panel duct 1 having a simple shape shown in FIG. 15 was formed by the same forming method as that shown in FIGS.
- the instrument panel duct 1 shown in FIG. 15 has a simple structure in which fitting parts 102 are provided at both ends of the pipe part 101.
- the instrument panel duct 1 shown in FIG. 15 has a flange portion 103 connected to a pipe body X ⁇ b> 1 (see FIG.
- WB140 / C4BSW / DF605 55 parts / 40 parts / 5 parts PO217K: 1 part, black MB: 1 part
- WB140 Borealis HMS-PP (High Melt Strength-PP: High melt tension polypropylene)
- BC4BSW Polypropylene manufactured by Nippon Polypro Co., Ltd.
- DF605 Copolymer of ethylene and butene manufactured by Mitsui Chemicals, Inc.
- PO217K Inorganic foaming agent manufactured by Dainichi Seika Kogyo Co., Ltd.
- Black MB Tokyo Ink Co., Ltd. Made carbon black masterbatch
- Foaming ratio 1.5 to 1.8 times (specific gravity: 0.60 to 0.50)
- Blow pressure 0.1Mpa
- the weight of the instrument panel duct 1 having a simple shape shown in FIG. 15 was changed depending on whether the set flange thickness was 3.05 mm or 4.57 mm.
- the set flange thickness means the thickness T between the cavities 10a and 10b of the split molds 12a and 12b shown in FIG.
- the flange side wall thickness and the flange wall thickness of the molded instrument panel duct 1 were measured, and the value of flange thickness / flange side wall thickness was calculated.
- the flange side wall thickness is the thickness A around the portion where the plate-like portions Y1 of the tube main body X1 are connected.
- the flange side wall thickness is a thickness in a range L1 of 5 mm from the location ⁇ where the plate-like portions Y1 are connected.
- the flange thickness is a thickness B in the thickness direction of the plate-like portion Y1.
- a balloon-shaped bubble 81 shown in FIG. 2, a gap 82 shown in FIG. 4, and a cavity 83 shown in FIG. 5 are generated inside the plate-like portion Y1 on the inner surface of the tube body X1 of the molded instrument panel duct 1. Inspected.
- FIG. 16 shows the inspection results of the instrument panel duct 1 molded with the set flange thickness T of 3.05 mm. Moreover, the test result of the instrument panel duct 1 molded with a set flange thickness T of 4.57 mm is shown in FIG.
- balloon-shaped bubbles 81 were generated in a plurality of samples. As shown, balloon-shaped bubbles 81 were generated in some samples.
- the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. 5 are generated inside the plate-like portion Y1. It was way. For this reason, when a number of instrument panel ducts 1 having a flange thickness / flange side wall thickness value of 2.80 were formed and the samples were inspected, the flange wall thickness / flange side wall thickness value was 2. In the case of 80, the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. 5 did not occur inside the plate-like portion Y1 in all the samples.
- the value of the flange thickness / flange side wall thickness needs to be greater than 1.40 and less than 2.82. .
- the balloon-shaped bubbles 81 shown in FIG. 2 and the signs that the balloon-shaped bubbles 81 are generated can be removed as defective instrument panel ducts 1 by checking the inner surface of the tube body X1 during production.
- the instrument panel duct 1 in which the cavity 83 shown in FIG. 5 is generated inside the plate-like portion Y1 cannot be discriminated even by confirming the inner surface of the pipe body X1, and therefore is removed as a defective instrument panel duct 1 during production. I can't.
- it is essential that the value of flange thickness / flange side wall thickness is less than 2.82.
- the wall thickness value is preferably greater than 1.40 and less than 2.82.
- flange wall thickness / flange side wall thickness is 1.70 or more and 2.40 or less.
- the plate-like portion Y1 since the plate-like portion Y1 is a portion connected to another member, the plate-like portion Y1 has a desired structural strength.
- the value of flange thickness / flange side wall thickness is preferably 1.80 or more, and more preferably 2.0 or more.
- the flange thickness can be increased with respect to the flange side thickness, and the plate-like portion Y1 can have a desired structural strength.
- the flange thickness is preferably 4.0 mm or more.
- the inspection results shown in FIGS. 16 and 17 are the inspection results when the instrument panel duct 1 having a simple shape shown in FIG. 15 is formed. However, when the instrument panel duct 1 having a complicated shape shown in FIG. 7 is formed, the value of the flange wall thickness / flange side wall thickness is more than 1.40 and less than 2.82, so that the balloon shape shown in FIG.
- the instrument panel duct 1 in which the air bubbles 81, the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. 5 are not generated inside the plate-like portion Y1 could be formed.
- the flange side wall thickness and the average thickness of the instrument panel duct 1 are substantially the same value.
- the average wall thickness means an average value of the wall thickness measured at equal intervals of about 100 mm in the hollow extending direction of the instrument panel duct 1.
- the measurement position does not include the plate-like portion Y1 described above.
- the flange side wall thickness and the average thickness of the instrument panel duct 1 are different values. Therefore, when the average thickness of the complicated instrument panel duct 1 shown in FIG.
- the simple-shaped instrument panel duct 1 shown in FIG. 15 takes into account that the flange side wall thickness and the average thickness of the instrument panel duct 1 are substantially the same value, so that the flange thickness / flange side wall More preferably, the thickness (average wall thickness) value is 2.0 or more and 2.4 or less.
- Example 2 The instrument panel duct 1 having a simple shape shown in FIG. 15 having a foaming ratio of 2.25 to 3.0 times (specific gravity of 0.40 to 0.30) was molded by the same molding method as in Example 1.
- FIG. 18 shows the inspection result of the instrument panel duct 1 molded with the set flange thickness T of 3.05 mm. Moreover, the test result of the instrument panel duct 1 molded with the set flange thickness T being 4.57 mm is shown in FIG.
- balloon-shaped bubbles 81 were generated in a plurality of samples. As shown, balloon-shaped bubbles 81 were generated in some samples.
- the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. It was way. For this reason, when a number of instrument panel ducts 1 having a flange thickness / flange side wall thickness value of 2.87 were formed and the samples were inspected, the flange wall thickness / flange side wall thickness value was 2. In the case of 87, the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. 5 did not occur inside the plate-like portion Y1 in all the samples.
- the value of the flange thickness / flange side wall thickness needs to be greater than 1.46 and less than 2.88. .
- the balloon-shaped bubbles 81 shown in FIG. 2 and the signs that the balloon-shaped bubbles 81 are generated can be removed as defective instrument panel ducts 1 by checking the inner surface of the tube body X1 during production.
- the instrument panel duct 1 in which the cavity 83 shown in FIG. 5 is generated inside the plate-like portion Y1 cannot be discriminated even by confirming the inner surface of the pipe body X1, and therefore is removed as a defective instrument panel duct 1 during production. I can't.
- the value of flange thickness / flange side wall thickness is less than 2.88.
- the flange wall thickness / flange side is preferably greater than 1.46 and less than 2.88.
- flange wall thickness / flange side wall thickness is 1.70 or more and 2.40 or less.
- the plate-like portion Y1 since the plate-like portion Y1 is a portion connected to another member, the plate-like portion Y1 has a desired structural strength.
- the value of flange thickness / flange side wall thickness is preferably 1.80 or more, and more preferably 2.0 or more.
- the flange thickness can be increased with respect to the flange side thickness, and the plate-like portion Y1 can have a desired structural strength.
- the flange thickness is preferably 4.0 mm or more.
- the inspection results shown in FIGS. 18 and 19 are the inspection results when the instrument panel duct 1 having a simple shape shown in FIG. 15 is formed.
- the value of the flange thickness / flange side wall thickness is greater than 1.46 and less than 2.88, so that the balloon shape shown in FIG.
- the instrument panel duct 1 in which the air bubbles 81, the gap 82 shown in FIG. 4 and the cavity 83 shown in FIG. 5 are not generated inside the plate-like portion Y1 could be formed.
- the flange side wall thickness and the average thickness of the instrument panel duct 1 are substantially the same value. Therefore, when the average thickness of the complicated instrument panel duct 1 shown in FIG. 7 is measured and the value of the flange thickness / average thickness is calculated, the value of the flange thickness / average thickness is less than 2.0. It has been found that balloon-shaped bubbles 81 shown in FIG. 2 may be generated. For this reason, the simple-shaped instrument panel duct 1 shown in FIG.
- the flange side wall thickness and the average thickness of the instrument panel duct 1 are substantially the same value, so that the flange thickness / flange side wall More preferably, the thickness (average wall thickness) value is 2.0 or more and 2.4 or less.
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- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
管本体と、前記管本体の外側に連接された板状部分と、を有する発泡成形体であって、
前記発泡成形体の発泡倍率が2倍未満であり、
前記管本体における前記板状部分が連接された箇所の周囲の肉厚Aと、前記板状部分の肉厚Bと、の関係である前記肉厚B/前記肉厚Aの値が2.82未満である、ことを特徴とする。
また、本発明にかかる発泡成形体は、
管本体と、前記管本体の外側に連接された板状部分と、を有する発泡成形体であって、
前記発泡成形体の発泡倍率が2倍以上であり、
前記管本体における前記板状部分が連接された箇所の周囲の肉厚Aと、前記板状部分の肉厚Bと、の関係である前記肉厚B/前記肉厚Aの値が2.88未満である、ことを特徴とする。
まず、図7~図9を参照しながら、本発明の一態様にかかる発泡成形体1の概要について説明する。図7~図9は、本発明の一態様にかかる発泡成形体1の構成例を示す図である。
まず、図7~図9を参照しながら、本実施形態のインパネダクト1の構成例について説明する。図7は、インパネダクト1の概略平面図であり、エアコンユニット(図示せず)に接続するための供給部105を有する側のインパネダクト1を示す。図8は、図7に示す嵌め合い部102d周辺の概略平面図を示し、図9は、図8のD-D’断面図を示す。
引張破壊伸び:後述する本実施形態の成形方法により得られたインパネダクト1の管本体X1を切り出し、-10℃で保管後に、JIS K-7113に準じて2号形試験片として引張速度を50mm/分で測定を行った値を引張破壊伸びとした。
引張弾性率:後述する本実施形態の成形方法により得られたインパネダクト1の管本体X1を切り出し、常温(例えば、23℃)で、JIS K-7113に準じて2号形試験片として引張速度を50mm/分で測定を行った値を引張弾性率とした。
次に、図10~図12を参照しながら、本実施形態のインパネダクト1の成形方法例について説明する。図10は分割金型の開状態、図11は分割金型の閉状態を分割金型側面から示した図である。図12は、分割金型の閉状態を2つの分割金型の当接面から分割金型12a側について示した図である。
上述した実施形態としてのインパネダクト1は、例えば、図14に示す成形方法で成形することも可能である。
こうした樹脂シートの厚み、押出速度、押出方向の肉厚等の調整は、公知の各種方法を用いてよい。
次に、実施例により上述したインパネダクト1について説明する。但し、以下の実施例に限定されるものではない。
本実施例では、インパネダクト1の原料樹脂として、以下の原料配合で作成した発泡パリソンを使用し、シリンダにガス供給口を有するスクリュー式押出機を備えた発泡ブロー成形機を用い、ガス供給口より窒素の超臨界流体を添加し、上述した図10~図12と同様な成形方法で図15に示す簡易な形状のインパネダクト1を成形した。図15に示すインパネダクト1は、管部101の両端に嵌め合い部102を設けた簡易な構造になっている。図15に示すインパネダクト1も図7に示すインパネダクト1と同様に、管部101、嵌め合い部102から構成される管本体X1(図9参照)にフランジ部103が連接されている。このため、図15に示すインパネダクト1においてフランジ部103が連接された箇所の切断面(図15のE-E断面)は、図9と同様な形状になる。
WB140/C4BSW/DF605=55部/40部/5部
PO217K:1部、黒MB:1部
但し、WB140:ボレアリス社製のHMS-PP(High Melt Strength-PP:高溶融張力ポリプロピレン)
BC4BSW:日本ポリプロ(株)製のポリプロピレン
DF605:三井化学(株)製のエチレンとブテンとの共重合体
PO217K:大日精化工業(株)製の無機系発泡剤
黒MB:東京インキ(株)製のカーボンブラックマスターバッチ
ブロー圧:0.1Mpa
実施例1と同様な成形方法で発泡倍率が2.25~3.0倍(比重が0.40~0.30)の図15に示す簡易な形状のインパネダクト1を成形した。
101 管部
102 嵌め合い部
103 フランジ部
104 橋渡し部
105 供給部
107 固定用孔
100、111 開口部
10a、10b キャビティ
12a、12b 分割金型
13 発泡パリソン
X1 管本体
Y1 板状部分
Z 型締めによる押圧力
A フランジ脇肉厚
B フランジ肉厚
81 風船形状の気泡
82 隙間
83 空洞
84、85 中空部
Claims (4)
- 管本体と、前記管本体の外側に連接された板状部分と、を有する発泡成形体であって、
前記発泡成形体の発泡倍率が2倍未満であり、
前記管本体における前記板状部分が連接された箇所の周囲の肉厚Aと、前記板状部分の肉厚Bと、の関係である前記肉厚B/前記肉厚Aの値が2.82未満である、ことを特徴とする発泡成形体。 - 前記値が1.40より大きい、ことを特徴とする請求項1記載の発泡成形体。
- 管本体と、前記管本体の外側に連接された板状部分と、を有する発泡成形体であって、
前記発泡成形体の発泡倍率が2倍以上であり、
前記管本体における前記板状部分が連接された箇所の周囲の肉厚Aと、前記板状部分の肉厚Bと、の関係である前記肉厚B/前記肉厚Aの値が2.88未満である、ことを特徴とする発泡成形体。 - 前記値が1.46より大きい、ことを特徴とする請求項3記載の発泡成形体。
Priority Applications (8)
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US15/312,385 US11052594B2 (en) | 2014-05-23 | 2015-05-07 | Molded foam |
CN201580025761.5A CN106457647B (zh) | 2014-05-23 | 2015-05-07 | 发泡成形体 |
MX2016015318A MX2016015318A (es) | 2014-05-23 | 2015-05-07 | Espuma moldeada. |
KR1020167032390A KR101968651B1 (ko) | 2014-05-23 | 2015-05-07 | 발포 성형체 |
KR1020197010028A KR102120633B1 (ko) | 2014-05-23 | 2015-05-07 | 발포 성형체 |
EP15795981.8A EP3147100A4 (en) | 2014-05-23 | 2015-05-07 | Foam molded body |
US17/336,752 US11628611B2 (en) | 2014-05-23 | 2021-06-02 | Molded foam |
US18/299,813 US20230271371A1 (en) | 2014-05-23 | 2023-04-13 | Molded foam |
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JP2014106804A JP6344056B2 (ja) | 2014-05-23 | 2014-05-23 | 発泡成形体 |
JP2014-106804 | 2014-05-23 |
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US17/336,752 Division US11628611B2 (en) | 2014-05-23 | 2021-06-02 | Molded foam |
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JP6344056B2 (ja) | 2018-06-20 |
CN106457647B (zh) | 2019-04-16 |
EP3147100A4 (en) | 2017-12-20 |
KR20160145777A (ko) | 2016-12-20 |
US11628611B2 (en) | 2023-04-18 |
KR101968651B1 (ko) | 2019-04-12 |
US20230271371A1 (en) | 2023-08-31 |
KR102120633B1 (ko) | 2020-06-09 |
EP3147100A1 (en) | 2017-03-29 |
US20210283819A1 (en) | 2021-09-16 |
KR20190040093A (ko) | 2019-04-16 |
MX2016015318A (es) | 2017-06-30 |
US20170080624A1 (en) | 2017-03-23 |
US11052594B2 (en) | 2021-07-06 |
JP2015221521A (ja) | 2015-12-10 |
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