WO1993020997A1 - Flat blow molding apparatus, flat blow molding method and product of flat blow molding - Google Patents
Flat blow molding apparatus, flat blow molding method and product of flat blow molding Download PDFInfo
- Publication number
- WO1993020997A1 WO1993020997A1 PCT/JP1993/000509 JP9300509W WO9320997A1 WO 1993020997 A1 WO1993020997 A1 WO 1993020997A1 JP 9300509 W JP9300509 W JP 9300509W WO 9320997 A1 WO9320997 A1 WO 9320997A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flat
- core
- parison
- resin
- die
- Prior art date
Links
Classifications
-
- 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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/075—Preforms or parisons characterised by their configuration having at least one internal separating wall
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3006—Preforms or parisons made of several components having tangentially different components within one layer, e.g. longitudinal stripes
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/025—General arrangement or layout of plant
- B29C48/0255—General arrangement or layout of plant for extruding parallel streams of material, e.g. several separate parallel streams of extruded material forming separate articles
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
- B29C48/705—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows in the die zone, e.g. to create flow homogeneity
-
- 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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
- B29C49/041—Extrusion blow-moulding using an accumulator head
Definitions
- the present invention relates to a flat blow molding apparatus for injecting a hollow flat parison, a flat blow molding method, and an obtained flat blow molded product in order to obtain a flat product.
- the present applicant does not extrude the cylindrical parison a first, but instead of extruding the flat cylindrical core and the flat die surrounding it, the hollow flat matching the inner wall of the thin mold bc.
- a flat blow molding machine that can extrude a parison of shape and form a hollow plate with uniform wall thickness (Japanese Patent Publication No. 63-38285, etc.)
- this type of flat blow molding apparatus forms an accumulator chamber e having a flat cross section in a housing d in a vertical direction, and a flat flat mandrel f in the center of the accumulator chamber e.
- a flat mandrel ⁇ is fitted with the Bihira histon g.
- the flat piston g is lowered by the hydraulic cylinder 1 to remove the resin in the accumulator chamber e. Pressurized, and pressurized resin is extruded as a hollow flat parison k from the gap between the flat core i provided at the tip of the flat mandrel f and the flat die j provided at the lower end of the housing d.
- Resin is supplied to the accumulator chamber e from extruders q provided on both left and right sides in the thickness Y direction. As shown in Fig. 35, the extruded flat parison is sandwiched by unillustrated molds (not shown) from the front and back of the paper, air blown, and new paper ,
- the conventional flat blow molding apparatus has the following disadvantages.
- the resin filled in the flat accumulator chamber e has a pressure distribution having a high center and a low end at both ends along the width X direction, the resin is filled with the injection port m between the flat die J and the core i. When it is ejected from the surface, the extruded flat varizon will be curved due to the pressure distribution.
- the flat mandrel f is moved up and down by the actuator 1 to adjust the gap between the flat core i and the flat die J (gap adjustment) to control the thickness of the barison k in the injection direction.
- the flat mandrel f since the accumulator chamber e is filled with resin, the flat mandrel f must be moved up and down with a force to overcome this resin pressure.
- this scar mandrel f is It is conceivable that the center of the accumulator chamber e deviates from the center of the accumulator chamber e within the range of the sliding surface tolerance between the evaporator chamber e and the flat piston g, the flat piston, g and the flat mandrel.
- the gap (gap) between the flat core i provided at the tip of the mandrel f and the flat die j provided at the lower end of the housing d changes.
- the thickness of the flat parison k to be injected becomes uneven, bending occurs, and sound blow molding cannot be performed. It also causes abnormal wear and galling of the sliding surface.
- the injected hollow flat parison k expands due to the swelling characteristic of the resin as shown in Fig. 37 when it is injected from the high-pressure accumulator chamber e to the atmospheric pressure state.
- the short side ratio of the cross section is smaller than the injection port m between the flat die j and the core i, and bulges, so that the bulged parison k no longer matches the inner walls of the thin molds b and c.
- the blow-molded product becomes heavy with lots of meat and waste, and if the injected flat parison k has vertical wrinkles, it must be pre-blown to correct it.
- bent ducts having multiple passages in the longitudinal direction are used.
- this kind of bent duct is manufactured by blow molding, multiple parisons are injected from multiple injection heads, and a part or part of the parison is melted or injected into the mold.
- a method was used in which both sides of the parison were pressed so as to be sandwiched between veneers along the injection direction, and the parisons at the tip of the veneer were fused together.
- the former method uses a multi-injection head, which causes the entire apparatus to be large-sized.
- the groove remaining when the veneer is pulled out of the parison is formed. There is a problem that the strength and aesthetics are impaired.
- a first object of the present invention which has been made in consideration of the above circumstances, is to provide a flat blow molding apparatus capable of changing the width of a flat parison extruded from the apparatus.
- the second object is to manufacture a molded product narrower than the parison injected from the gap between the Bipei die and the core.
- a third object is, along a resin pressure in the accumulator chamber in the width direction can substantially uniformly to provide a ⁇ blow molding apparatus capable of injecting a ⁇ parison without bending tt
- a fourth object of the present invention is to provide a flat blow molding apparatus capable of preventing a deviation of a Bibi mandrel and injecting a Bibi parison having a uniform wall thickness.
- a fifth object is to provide a blow molding apparatus in which the housing is divided at the time of resin color change-material change so that the inside can be easily cleaned.
- a sixth object is to provide a blow molding method, apparatus, and a molded article that can prevent the injected hollow Bipari parison from being deformed due to the swell characteristic and the drawdown.
- a seventh object is to provide a bent blow molding method and a blow blow molded product which can be manufactured by using a small apparatus without impairing the strength and aesthetics of the molded product when manufacturing a bent blow molded product having an interior partitioned along the injection direction.
- a first invention is directed to a flat blow molding apparatus which extrudes a hollow flat-shaped parison from a gap between a flat core and a flat die surrounding the flat core. It is characterized in that both ends of the die are freely slidable in the width direction with respect to a center portion thereof, and the core is replaceable in accordance with expansion and contraction in the width direction of the die. Further, the flat core is composed of a flat exchange part disposed at the center and a non-exchange part having a curved shape disposed at both ends, and only this exchange part is exchanged according to expansion and contraction in the width direction of the die. You may do so.
- both ends of the die are slid in the width direction, and the core is appropriately replaced in accordance with the expansion and contraction of the die in the width direction, so that the hollow die extruded from the gap between the core and the die.
- a parison width change is achieved.
- the above-mentioned flat core is composed of a flat exchange part and a curved non-exchange part, and only this exchange part is replaced, only the flat exchange part which does not require machining cost will have a length. It is only necessary to prepare a plurality of different types, so that the cost is low.
- the width of the hollow parison extruded from the gap between the flat core and the flat die can be changed.
- a second invention is directed to a flat blow molding apparatus in which a wide hollow flat parison is injected from a gap between a flat flat core and a flat die surrounding the flat core.
- the flat core is divided into a plurality of parts in the width direction, an intermediate piece is interposed between the divided cores, and a plurality of injection holes are formed by the divided core and the intermediate piece.
- the hollow flat parison extruded from between the flat die and the core is separated by the intermediate piece, and a plurality of flat parisons are simultaneously injected. At this time, the parison is not extruded below the intermediate piece, It can be made small and the cost is low.
- the width and number of the above-mentioned intermediate pieces are appropriately changed according to the size of the molded product, it is possible to respond to products of various and various widths and improve productivity
- an accumulator chamber having a flat cross section is formed in a housing in a vertical direction, and a flat flat mandrel is arranged at the center of the accumulator chamber.
- the flat piston is fitted on the flat mandrel, and the flat piston is lowered to pressurize the resin in the accumulator chamber.
- the flat core is provided at the tip of the bipy mandrel and provided at the lower end of the housing.
- a resin supply path for exclusive use of resin in the accumulator chamber is provided in the housing in the width direction of the accumulator chamber.
- a plurality of resin supply passages are provided at intervals and flow control valves are provided in these resin supply passages, respectively.
- a flat accumulator chamber having a flat cross section is formed in the housing in the vertical direction, a flat flat mandrel is arranged at the center of the accumulator chamber, and a flat piston is fitted on the flat mandrel, ⁇
- the piston in the accumulator chamber is pressurized by lowering the Bipi piston, and a hollow flat is formed from the gap between the flat core provided at the tip of the flat mandrel and the VS flat die provided at the lower end of the housing.
- a resin supply groove is formed along the upper and lower directions on the lab surface of the flat piston, and a resin supply groove is formed at the lower end of the resin supply groove in a downward direction.
- a resin distribution groove may be formed that spreads in an X-shape in the width direction of the accumulator chamber.
- the resin filled in the flat accumulator chamber passes through the resin supply paths provided at intervals in the width direction of the accumulator chamber, and is appropriately controlled by the flow control valves in each supply path. It flows into the accumulator chamber while the flow rate is adjusted. As a result, the resin pressure in the accumulator chamber ⁇ becomes substantially uniform along the width direction It is possible to inject a straight, flat, non-curved lyson.
- the resin flowing to the lower flat accumulator chamber through the resin supply grooves formed vertically on the side surface of the flat piston is dispersed in the width direction along the subsequent fan-shaped resin distribution groove. While flowing into the leak accumulator chamber, the resin pressure in the vacuum accumulator chamber becomes substantially uniform along the width direction, so that the uncurved Li-Parison can be injected.
- the pressure of the resin charged into the accumulator chamber becomes substantially uniform along the width direction, so that a hollow flat parison without bending can be injected.
- a fourth aspect of the present invention is to form an accumulator chamber having a cross section in a vertical direction in a housing, and a flat flat mandrel in the center of the accumulator chamber in a vertical direction.
- a flat piston is fitted on the flat mandrel, and the flat piston is moved up and down to pressurize the resin in the accumulator chamber.
- the pressing roller sandwiches the flat mandrel above the accumulator chamber from both left and right sides, so that the position of the flat mandrel is maintained at the center of the accumulator chamber.
- the deflection of the flat mandrel is reduced.
- the actuator moves the pressing roller away from the flat mandrel to prevent contact and interference between the rising flat piston and the pressing roller.
- a resin is filled in a housing.
- the resin in the accumulator chamber is pressed by a force of 1 with a biston, and is extruded as a hollow N ° son from a gap between a core and a die surrounding the core.
- the housing is divided into a right-hand housing and a left-hand housing along the up-down direction of the accumulator chamber, and an actuator for separating and connecting the right-hand housing and the left-hand housing is provided.
- a sixth aspect of the present invention is directed to a blower in which a wide hollow flat parison is injected from a gap between a flat flat core and a flat die surrounding the flat core.
- a plurality of resin passages connecting the left and right surfaces of the core are formed at the tip of the flat core in the parison injection direction at intervals in the width direction of the core.
- a plurality of resin passage grooves communicating the left and right surfaces of the core are formed at intervals at a front end portion of the Bipira core in the parison injection direction at intervals in the width direction of the core.
- a wide hollow flat parison is injected through the gap between the flat Jiangping core and the surrounding flat die, and the parison is sandwiched between molds to inject air into the interior.
- a core A plurality of resin passage grooves connecting both the left and right sides are formed at intervals in the width direction f of the core, and a hollow leaky Norison is injected from a gap between the flat core and a Bipei die surrounding the core.
- a plurality of partitions are formed in the hollow flat parison at intervals in the width direction by a resin that has passed through the groove, and the parison is sandwiched between molds and air is injected.
- a plurality of partition walls spaced apart in the width direction are formed along the injection direction inside the hollow ffi flat parison injected from the gap between the flat core and the flat die.
- the partition walls suppress the deformation of the hollow flat parison based on the spout characteristics and drawdown of the injection resin, and provide a sound thin hollow blow-molded product.
- a seventh invention is to provide a hollow circular parison that is injected from a gap between a cylindrical core and a cylindrical die surrounding the core, and the parison is sandwiched between molds and inserted inside.
- a resin passage for guiding the resin on the side surface of the core toward the center of the core is radially formed at the tip of the core in the parison injection direction, and the core and the surroundings thereof are formed.
- a hollow circular parison is injected from a gap between a cylindrical core and a cylindrical die surrounding the core, and is injected into a blow molding device in which the barison is sandwiched by a mold and air is injected into the inside.
- a blow molding apparatus characterized in that a resin passage for guiding the resin on the side surface of the core toward the center of the core is radially formed at the tip of the core in the parison injection direction so as to form a partition inside the hollow circular parison. It is.
- a resin passage ⁇ ⁇ for guiding the resin on the side surface of the core toward the center of the core is formed radially, and a hollow circular barison is injected from a gap between the core and a die surrounding the core.
- Resin that has passed through the resin passage groove A partition is formed inside a hollow circular parison, and the parison is formed by air-producing in a mold.
- FIG. 1 is an explanatory view of a main part of a Bippu blow molding apparatus as one embodiment of the first invention, (a) is a front sectional view, (b) is a side sectional view, and (c) is a bottom view.
- Fig. 2 is a partial cross-sectional front view of the flat blow molding device
- Fig. 3 is a partial cross-sectional view of the flat blow molding device
- Fig. 4 is a tip of the flat core mandrel.
- Fig. 5 is a view showing a modification of Actu Yue, which slides a slide piece of a flat die
- Fig. 6 is a view showing a modification of both ends of a flat core and a flat die.
- Fig. 1 is an explanatory view of a main part of a Bippu blow molding apparatus as one embodiment of the first invention, (a) is a front sectional view, (b) is a side sectional view, and (c) is a bottom view.
- FIG. 7 is a front view of a Bippu blow molding apparatus showing an embodiment of the second invention
- Fig. 8 is a molding formed by air blowing a grave parison injected from the molding apparatus.
- Fig. 9 is an enlarged view of a main part of Fig. 7.
- Fig. 10 is a cross-sectional view taken along line XX of Fig. 9.
- Fig. 11 is XI of Fig. 9
- Fig. 12 is a front view of a flat blow molding apparatus showing one embodiment of the third invention
- Fig. 13 is a cross-sectional view taken along line XIII-XIII in Fig. 12
- Fig. 14 is a cross-sectional view taken along the line XIV-XIV in Fig. 13.
- Fig. 13 is a cross-sectional view taken along line XIII-XIII in Fig. 12
- Fig. 14 is a cross-sectional view taken along the line XIV-XIV in Fig. 13.
- FIG. 15 is a perspective view showing the flat piston of the flat blow molding apparatus
- Fig. 16 is a side of the flat blow molding apparatus
- Fig. 17 is a partial cross-sectional side view of a flat blow molding apparatus as one embodiment of the fourth invention, showing a halfway up of a biston piston.
- Fig. 19 is a partial cross-sectional side view of the flat blow molding apparatus, showing a state in which the flat piston is lowered
- Fig. 19 is a partial cross-sectional front view of the flat blow molding apparatus.
- 0 is It is a partial section side view of a flat blow molding device as one example of the fifth invention.
- FIG. 21 is a partially sectional front view of the flat blow molding apparatus, and is a sectional view taken along line XXI-XXI in FIG.
- FIG. 22 is a sectional view taken along line XXII-XXU of FIG.
- FIG. 23 is a partial cross-sectional front view of a flat blow molding apparatus as one embodiment of the sixth invention.
- FIG. 24 is a partial cross-sectional side view of the above Bibihei blow molding apparatus.
- FIGS. 25A and 25B are views showing the tip of the flat core of the above-mentioned Bippu blow molding apparatus, wherein FIG. 25A is a side view, FIG. FIG. 26 is an enlarged side sectional view of a main part of the flat blow molding apparatus.
- FIG. 25A is a side view
- FIG. FIG. 26 is an enlarged side sectional view of a main part of the flat blow molding apparatus.
- FIG. 27 is a bottom view of the flat blow molding apparatus.
- FIG. 28 is a perspective view showing an automobile seat blow-molded by the flat blow molding apparatus.
- FIGS. 29 (a) and 29 (b) are explanatory views of a blow molding method according to an embodiment of the seventh invention.
- FIG. 29 (a) is a sectional view of a main part of a bending blow molding apparatus, and
- FIG. 29 (b) is a bottom view thereof.
- FIG. 30 is a schematic view of the bent blow molding apparatus.
- FIG. 31 is a perspective view showing a bent blow-molded product manufactured by the above-mentioned bent blow-molding apparatus.
- FIG. 32 is a view showing a modified embodiment of the present invention, in which (a) is a bottom view of a core having three resin passage grooves, and (b) is a bottom view of a core having four resin passage grooves. It is a bottom view.
- FIG. 33 is an explanatory view of a flat blow molding apparatus showing a conventional example.
- FIG. 34 is an explanatory view of a flat blow molding apparatus developed earlier by the present applicant, (a) is a front view, (b) is a side view, and (c) is a bottom view.
- FIG. 35 is a partially enlarged view of FIG. 34 (a).
- FIG. 36 is a view showing a molded product obtained by air blowing flat parison injected from the flat blow molding apparatus.
- Figure 38 is a diagram showing how the cross section of a hollow parison is deformed due to swirl characteristics and drawdown.
- Fig. 2 shows a front view of the flat blow molding apparatus 101
- Fig. 3 shows a side view thereof.
- a flat accumulator having a width X and a thickness Y is provided in a flat body 102.
- the accumulator chamber 1 ⁇ 3 where the chamber 103 is formed two extruders 104a and 104b provided on the left and right in the direction of the thickness Y are plasticized. Resin It is being supplied.
- the resin may be distributed to the accumulator chamber 3 through a distribution valve (not shown) with one extrusion rule 104 a and 104 b.
- the accumulator chamber 103 houses a flat piston 105 that slides freely in the vertical direction.
- the flat piston 105 is connected to an oil cylinder 107 provided above the main body 102 via an intermediate member 106. According to this configuration, by expanding and contracting the hydraulic cylinder 107, the flat piston 105 slides in the accumulator chamber 103 ⁇ in the vertical direction to compress the resin.
- the flat piston 105 has a flat hole 108 formed in the vertical direction, and a flat mandrel 1 9 is passed through the hole 108.
- the upper end of this mandrel 10 is connected to an actuator 11 (cylinder mechanism) above the main body through an intermediate member 110, and the lower end of the mandrel 109 is a flat core 1 1 2 Is attached.
- a flat-shaped die 113 is provided on the peripheral surface of the flat core 112 at a predetermined interval so as to surround the die. E The die 1 1 3 via the formate da 1 1 4, the plate 1 1 5 card attached to your lower end of the body 1 0 2
- the flat die 113 includes a central straight portion 113a and corner portions 113b at both ends.
- the straight section 1 1 3a is composed of two flat
- the corners 1 13 b are composed of slide beads 1 18 slidably sandwiched between the flat blocks 1 17. ing.
- This slide piece] 18 has a concave curved portion 118a, and is slid in the width direction by an actuator 119 (hydraulic cylinder) supported by a die holder 114.
- an oil cylinder is used for the actuator 119, but the invention is not limited thereto, and a step motor or a feed screw mechanism 119a as shown in FIG. 5 may be used.
- the slide piece 118 is freely moved in the width direction by the actuator 119, and is fixed at an arbitrary position.
- the core 1 1 2 has a plate-like exchange section 1 1b arranged at the center and a curved non-exchange section 1 1b arranged at both ends.
- the above-mentioned exchange part 1 1 2 b composed of 2 a and 2 a is a plate-like member formed to have the same thickness as the thickness of the plate-like mandrel 109 and the above-mentioned non-exchange part 1 1 2 a Is a member having a convex curved portion 112c corresponding to the concave curved portion 118a of the slide piece 118.
- the exchange section 112b and the non-exchange section 112a are attached to the lower end of the flat mandrel 109 from below by bolts 120, respectively.
- Fig. 4 shows the situation.
- the connecting portion 1 2 1 between the lower end of the flat plate mandrel 109 and the upper end of the core 1 1 2 (exchange portion 1 1 2 b and non-exchange portion 1 1 2 a) has an intaglio groove. These alignments can be performed accurately.
- hexagonal head bolts 120 hexagonal hole bolts may be used.
- the concave curved portion 1 18 a and the convex portion are respectively formed on the slide piece 1 18 of the flat die 1 13 and the non-replaceable portion 1 12 a of the flat die 112.
- the curved part 1 1 2 c was formed, but considering the fact that the parison 1 16 slightly expanded when air was injected during blow molding, as shown in FIG. According to this configuration, when air is injected, the concave central portion swells moderately, and the outer surface of the parison] 16 comes into contact with the inner wall of the mold almost simultaneously, so that the thickness of the molded product is made uniform. Becomes possible.
- the parison parison 1 16 is extruded from the gap between the levitation die 1 13 and the core 1 112.
- the core 1 1 and 2 are composed of a central exchange section 1 1 2 b and non-exchange sections 1 1 2 a at both ends, and only this exchange section 1 1 2 b is replaced. Therefore, it is only necessary to prepare a plurality of linear (flat) replacement parts 1 and 2b having different lengths, which does not require processing cost, and the cost is low.
- the actuator 1 11 1 is advanced or retracted by a signal from a gap setting device (not shown), and the bipyre core 1 1 2 is appropriately moved up and down via the mandrel 1 09.
- the gap (gap) between the die 12 and the die 11 13 changes, and the thickness profile of the flat parison 1 16 in the injection direction (longitudinal direction) can be adjusted.
- the actuator 1 19 moves forward and backward by another signal of the gap setting device and the slide piece 1 18 moves as appropriate, the width in the width direction of the Yuhei parison 1 16 can be obtained. It is also possible to adjust the thickness profile
- FIG. 7 is a front view of the flat blow molding apparatus 201
- FIG. 9 is an enlarged view of a main part thereof
- FIG. 0 shows a cross-sectional view taken along the line XX in FIG. 9
- FIG. 11 shows a cross-sectional view taken along the line X-X ′ in FIG.
- an accumulator chamber 203 having a flat cross section with a width X and a thickness Y is formed in a housing 202 in a vertical direction.
- the accumulator chamber 203 slides freely in the up and down direction.
- a flat piston 204 is housed.
- the bipi piston 204 is connected to the housing 200 via an intermediate member 205.
- the hydraulic cylinder 206 is connected to a hydraulic cylinder 206 provided above the hydraulic cylinder 200.
- the hydraulic cylinder 206 is mounted on a frame 207 provided above the housing 202. According to this, by expanding and contracting the hydraulic cylinder 206, the piston 204 slides up and down in the accumulator chamber 203, and the resin filled therein is compressed.
- a flat-shaped hole 209 is formed in the Bipei biston 204 in the vertical direction, and a flat mandrel 209 is passed through the hole 209.
- the upper end of the mandrel 209 is connected to an actuator 211 (cylinder machine) provided on the frame 207 via an intermediate member 210, and is connected to the lower end of the mandrel 209.
- the flat core 211 is attached with bolts (not shown) .
- the flat core 211 is the first flat core 211a narrower than the width of the flattened mandrel 209. It consists of a second sealing core 2 1 2b, which are arranged at a predetermined interval.
- Each of the flat cores 21a and 21b has an enlarged diameter at its tip, and a flat die 21 is provided around the core at a predetermined interval. Further, an intermediate piece 214 that separates the first and second flattened cores 21a and 21b is interposed therebetween.
- the intermediate piece 2 14 is formed into a mountain shape so that the resin in the accumulator chamber 203 is guided to each of the flat cores 2 1 2a and 2 1 2b as shown in Fig. 9.
- the lower part 2 16 is formed into a shape that is continuous with the flat die 2 13 so as to form two parison injection ports 2 17 a and 2 17 b as shown in FIG.
- the flat die 2 13 and the intermediate piece 2 14 are attached to a lower housing 202 a attached to the lower end of the housing 202 by a plate 2 18. According to this configuration, when the piston 204 descends to compress the resin in the accumulator chamber 203, the heated resin is mixed with the leakage die 21 and the first and second Liping cores 21.
- the hollow parisons 21a and 219b having a predetermined width are extruded from the gaps between the two parisons 2a and 212b (that is, the two pason outlets 217a and 217b).
- the actuator 211 for raising and lowering the mandrel 209 to move the cores 212a and 212b up and down to adjust the gap (gear 'zop) with the die 213, the extruded Biparison 219 is extruded.
- the thickness of a and 219b in the extrusion direction can be controlled.
- the hollow flat parison 219 extruded from between the flat die 213 and the core 212 is separated by an intermediate piece 214, and two biparis parisons 219a and 21b are simultaneously formed from one molding apparatus 201. It will be injected. At this time, the parison is not extruded below the ⁇ space 214, so if these flat parisons 219a and 219b are sandwiched by flat molds (not shown) from the front and back of the paper, air blow is performed. As shown in FIG. 8, unnecessary burrs 220 (shown by diagonal lines) can be minimized.
- the width and number of the intermediate pieces 21-4 are appropriately changed according to the width of the molded articles 221a, 22Ib, and the width of the extruded flat parisons 219a, 219b is appropriately adjusted.
- a single molding device 201 can handle products of various types and widths, improving productivity.
- FIG. 12 is a front view of the flat blow molding apparatus
- FIG. 13 is a cross-sectional view taken along line XIII-X in FIG. 12
- FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG.
- an accumulator chamber 302 having a flat cross section of ilX and thickness ⁇ is formed in the housing 301 in the vertical direction.
- the accumulator chamber 302 houses a flat piston 303 that slides freely in the vertical direction.
- the flat piston 303 is connected to a hydraulic cylinder 305 provided above the housing 301 via an intermediate member 304.
- the hydraulic cylinder 300 is mounted on a frame 303 provided above the housing 301. According to this configuration, by expanding and contracting the hydraulic cylinder 300, the piston 303 slides up and down in the accumulator chamber 302, and the resin filled in the upper portion is compressed.
- the flat piston 300 has a flat hole 307 formed in the vertical direction in the vertical direction, and a flat mandrel 308 is inserted into the hole 307.
- the upper end of the mandrel 308 is connected to an actuator 310 (cylinder mechanism) provided on the frame 306 via an intermediate member 309, and the lower end of the mandrel 308 is connected to the lower end of the mandrel 308.
- a flat core 311 is attached with bolts (not shown).
- the tip of the flat core 311 is enlarged, and a flat die 312 is provided around the flat core 311 at a predetermined interval.
- the flat die 312 is attached to a lower housing 313 attached to a lower end of the housing 301.
- the pressurized resin is hollowed out from the gap between the flat die 312 and the flat core 311. It will be extruded as parison 3 1 4.
- the core 311 is moved upward and downward by operating the actuator 310 for elevating and lowering the mandrel 3108 to adjust the gap (gap) with the die 312, it is not pushed out.
- the thickness of the flat parison 3 1 4 in the extrusion direction can be controlled.
- the housing 301 has an extruder 3 15 positioned at the left and right sides in the thickness direction ⁇ ⁇ ⁇ to supply the plasticized resin into the accumulator chamber 302.
- the resin passage block 3 16 includes a first passage block 3 17 at the lower stage and a second passage pro at the upper stage.
- inside the first passage block 3 17 Has a first passage 3 19 extending in the width X direction.
- Departure 3 15 is connected. At both ends of the first passage 3 19, the upper second passage passage
- a second passage 3221 extending in the width X direction is formed in the ⁇ second passage block 318 provided with a connection passage 320 toward the jack 3118.
- a passage 3 221 was formed in the housing 3 1 to supply resin to the flat surface of the flat piston 303.
- the supply paths 322 are connected with a predetermined interval in the width X direction.
- Each supply passage 3 2 2 has a flow control valve 3 2 3 for controlling the resin flow passing therethrough.
- the gap between the tip of the nozzle (needle valve) and the valve seat is adjusted to control the resin flow.
- the resin introduced into the housing 301 through the supply channels 3 22 is shown in FIG.
- Ton 303 has a lavatory on the second passage block 318 and housing 301
- a resin distribution groove 325 that extends in a fan shape in the width X direction in the downward direction is formed.
- the height of the distribution weir 3 2 6 is the width of the resin in the X direction.
- the resin pressure at both ends 3 2 6 a is reduced compared to the center 3 2 6 b of the distribution weir 3 2 6, so that the resin flow rate is approximately constant along the width X direction -
- the operation of the present embodiment having the above configuration will be described.
- the resin extruded from the extruders 3 1 and 5 arranged on the left and right sides in the thickness Y direction flows into the first passage 3 19 in the first passage block 3 17 and passes through the connection passage 3 20. Flows into the second passage 3 21 in the second passage block 3 18. Then, through the supply path 3 22, the flow rate is appropriately adjusted by the respective flow control valves 3 2 3 so that the flow rates of the respective supply paths 3 22 are equalized, and formed on the side surface of the flat biston 303.
- the resin that has flowed into the resin supply ⁇ 3 2 4 passes through a fan-shaped resin distribution box 325 formed by being connected to the lower end thereof, and passes over the distribution weir 3 2 6 at the lower end of the distribution groove 3 25. It flows into the accumulator room 302. At this time, the height of the distribution weir 3 26 is lower at both ends 3 26 a in the width X direction and higher at the center 3 26 b, so that the resin flow rate is approximately constant along the width X direction. Become.
- the resin pressure in each of the resin supply channels 3 2 4 becomes substantially uniform along the width X direction, and the distribution of the resin distribution grooves 3 2 5 connected to each of the resin supply grooves 3 2 4 is performed. Since the downstream resin pressure becomes substantially uniform along the width X direction, the resin pressure in the accumulator chamber 302 becomes uniform along the width X direction. Therefore, when this is injected from between the flat die 312 and the core 311, the flat parison 314 without bending can be injected. '
- FIG. 18 shows a plan view of the flat blow molding apparatus 401
- FIG. 19 shows a front view thereof.
- an accumulator chamber 400 with a flat cross section having a width X and a thickness Y is formed in the housing 402 in the vertical direction.
- Plasticized resin is supplied from two extruders 404a and 404b provided on the left and right of the direction. It should be noted that the extruders 404a and 404b may be combined into a single unit and the resin may be distributed to the accumulator chamber 403 through a distribution valve (not shown).
- the accumulator chamber 403 accommodates a flat piston 405 that slides freely in the vertical direction.
- the Liping piston 405 is connected to a hydraulic cylinder 407 provided above the housing 402 via an intermediate member 406.
- This hydraulic cylinder 407 is mounted on a frame provided on the top of the housing 402. Mounted on 408. According to this configuration, the piston 405 slides up and down in the accumulator chamber 403 by expanding and contracting the hydraulic cylinder 407 to compress the resin filled therein.
- reference numeral 409 denotes a port for fixing the housing 402 and the frame 4 8.
- a flat hole 4110 is formed in the flat biston 405 in the vertical direction, and a flat mandrel 411 is passed through the hole 410.
- the upper end of the mandrel 4 11 is connected to an actuator 4 13 (cylinder mechanism) provided on the frame 4 08 via an intermediate member 4 12, and the lower end of the mandrel 4 1 1 Has a flat core 4 14 attached with bolts.
- the tip of the Xiaping core 414 has an enlarged diameter, and a flat die 415 is provided around the periphery of the core at a predetermined interval.
- the die 4 15 is attached to a lower housing 4 16 attached to a lower end of the housing 402 by a plate 4 17.
- the pressurized resin is hollowed out from the gap between the flat die 415 and the flat core 414. It will be extruded as Nairin Parison 4 1 8.
- the core 4 14 is moved upward and downward by operating the actuator 4 13 which raises and lowers the mandrel 4 11, the gap (gap) with the die 4 15 is adjusted.
- the thickness of the flat parison 4 18 in the extrusion direction can be controlled.
- the feature of the present embodiment is that, as shown in FIG. 18, in the frame 408 above the accumulator chamber 403, it is located on the left and right sides of the basket flat mandrel 4 11, and This is the point where the pressure roller 4 19 that sandwiches 11 from both sides is provided.
- the pressing rollers 419 are rotatably supported by brackets 420, respectively.
- the brackets 420 are provided on the left and right sides of the housing 402 and the frame 408, respectively. It is attached to the actuator 4 2 1 (hydraulic cylinder, step motor, etc.) fixed to 5. That is, by expanding and contracting the actuator 421, each pressing opening 411 is brought into contact with and separated from the left and right side surfaces of the Bihira mandrel 411.
- These actuators 4 2 Numerals 1 are respectively connected to the controllers 4 2 2 so that expansion and contraction can be controlled independently by commands from the controllers 4 2 2.
- the controller 422 includes a first sensor 423 for detecting the moving amount of the flat mandrel 411 and a second sensor 424 for detecting the moving amount of the flat piston 405, respectively.
- the first sensor 4 23 connected via 4 2 3 a and 4 2 4 a is mounted downward on the top of the frame 4 08 as shown in FIG. Is provided via the supporting part 4 2 3b, the tip of which is in contact with the surface of the Bibi mandrel / layer 4 11 1 and detects the movement of the flat mandrel 4 1 1 by a mechanism such as magnescale. It is.
- a mechanism such as magnescale
- the second sensor 424 includes a rod portion 424 b attached to the intermediate member 406 on the upper part of the Liping piston 405, It consists of a cylindrical part 4 2 4 c attached to the upper part of the frame 4 08 to accommodate 2 4 b, and insertion of the mouth 4 2 4 b into the cylindrical part 4 2 4 c The movement amount of the flat piston 405 is detected based on the amount.
- the controller 422 is also connected to a hydraulic cylinder 407 for moving the flat stone 405 up and down.
- the position of the flat piston 405 is calculated based on the detection values obtained from the first and second sensors 423, 424, as shown in FIG.
- the actuator 421 is appropriately contracted to prevent the flat piston 405 from contacting the pressing roller 419, and the pressing roller 419 is attached to the flat mandrel 41.
- a program to separate from 1 is written.
- the controller 422 extends the actuators 421, and the pressing rollers 419 move the flat mandrel 411 above the piston 405. 1 is sandwiched between upper and lower sides from both left and right sides. As a result, the position of the bipy mandrel 411 at the time of parison injection is maintained at the center of the accumulator chamber, and the deviation of the flat mandrel 411 toward the radius is reduced.
- the gap (gear) between the flat core 4 14 provided at the tip of the mandrel 4 11 and the flat die 4 15 provided at the lower end of the lower housing 4 16 is a parison 4 18 During the injection, it is kept positive for a predetermined period of time, and the thickness of the flat parison 418 to be injected becomes uniform and the wall is prevented from bending.Thus, sound blow molding becomes possible.
- FIG. 17 is a view showing a state where the flat piston 405 is being lifted. When the flat piston 405 is further raised, the upper pressing roller 419 is also separated from the VT flat mandrel 411.
- pressing rollers 419 are required as a pair on the left and right, but need not be multi-stages on the top and bottom, but may be only a pair.
- Fig. 20 shows a side view of the (I) blow molding apparatus 501
- Fig. 21 shows a front view
- Fig. 22 shows a cross-sectional view taken along the line ⁇ - ⁇ in Fig. 20
- An accumulator chamber 503 having a width of X and a thickness of Y is formed in a housing 502 formed by connecting the left and right housings 502.
- the accumulator chamber 503 has left and right sides in the thickness Y direction.
- the plasticized resin is supplied from two extruders 504a and 504b provided in the resin pipes via resin pipes 505a and 505b.
- extruders 504a and 504b are detachably provided between the extruders 504a and 504b and the housings 502a and 502b, respectively, and the extruders 504a and 504b are provided as a single unit. May be distributed to the accumulator rooms 5 and 3.
- Ping Biston 506 has an intermediate member 507
- This oil cylinder 508 is connected to a hydraulic cylinder 508 provided above the housing 502 via a frame 509 which supports the housing 502 and has four frames. According to this configuration, the piston 506 is expanded and contracted, so that the piston 506 is placed in the accumulator chamber 503 by extending and contracting the hydraulic cylinder 508. Slides up and down to compress the resin charged inside.
- the piston 506 has a flat hole 512 formed in the vertical direction, and a flat mandrel 513 is passed through the hole 511.
- the upper end of the mandrel 5 13 is connected to the actuator 5 15 (cylinder mechanism) provided on the plate member 5 11 via the intermediate member 5 14.
- a flat die 517 is provided around the flat core 516 at a predetermined interval.
- the die 5 17 is attached by a plate 5 19 to a lower housing 5 18 attached to a lower end of the housing 502.
- the lower housing 5 18 is divided into a lower right housing 5 18 a and a lower left housing 18 b, and the lower end of the right housing 502 a and the lower end of the left measuring housing 502 b respectively. Attached to.
- the piston 506 compresses the resin in the accumulator chamber 503
- the pressurized resin flows through the gap between the flat die 5 17 and the flat core 5 16 It will be extruded as 5 2 0.
- the actuator 515 for raising and lowering the mandrel 513 to move the core 516 in the vertical direction to adjust the gap with the die 517
- the thickness in the extrusion direction of 20 can be controlled.
- the gist of the present embodiment is that “the housing 502 that divides the accumulator chamber 503 is divided into a right housing 502 a and a left housing 502 b”. This will be described with reference to FIG.
- the housings 502 a and 502 b are provided in a frame 509 having a rectangular frame shape, and the right housing 502 a and the left housing 502 are provided in the frame. 502b move with each other? ing. That is, the frame 5
- actuators 521 hydraulic cylinders, motors, etc. that slide and move. Each *.
- the housings 502a and 502b are adapted to be separated and coupled.
- the lower right housing 518a and the lower left housing 518b are installed.
- the actuator 521 expands and contracts, and the
- the joint surface of the housing 502 b has pins 5 that align the housings at the time of joining.
- This pin 522 facilitates positioning
- each housing 50 has a tapered pin having a reduced diameter.
- each housing 50 has a tapered pin having a reduced diameter.
- a bolt and nut 524 are provided for fixing. This allows the right housing
- Ganpei Parison 520 is extruded from the gap between the cores 516.
- each housing 502a Remove the bolts and nuts 5 2 4 that are joined and fixed to 502 b, and extend and retract the actuator 52 1 so that the right housing 502 a and the left housing 502 b are separated. Slide to. Then, the flat die 5 17 attached to the lower housing 5 18 and the ginkgo core 5 16 attached to the lower end of the mandrel 5 13 are removed.
- the right measuring housing 502a and the left housing 502b move to the left and right ends, leaving only the flat piston 506 and the flat mandrel 513 in the center. That is, the inner walls of the accumulator chambers 503 on the inner surfaces of the housings 502 a, 502 b, 518 a, and 518 b are released. Therefore, the resin adhered to the inside can be easily removed by hand or a robot, and the inside can be cleaned extremely easily.
- the right housing 502 a and the left housing 502 b separated from each other may be connected in exactly the opposite manner.
- the invention is applied to a flat blow molding apparatus for injecting a flattened hollow plate, "Rison," in order to obtain a flat-shaped product.
- the present invention is not limited to this, and a cylindrical parison is injected.
- the present invention may be applied to an ordinary blow molding apparatus, in which case, the accumulator chamber 503 is cylindrical, the piston 506 is cylindrical, the Bibihei die 517, Nihei.
- the core 5 16 is also circular.
- FIG. 23 shows a front view of the flat-bed molding device 601
- FIG. 24 shows a side view thereof.
- an accumulator chamber 603 having a flat cross section with a width X and a thickness Y is formed in a vertical direction in a housing 602.
- a thickness Y is formed in the accumulator chamber 603.
- Plasticized resin is supplied from two extruders 604a and 604b provided on the left and right sides of the direction. It should be noted that the extruders 604a and 604b may be provided as one unit, and the resin may be distributed to the accumulator chamber 603 through a distribution valve (not shown).
- the accumulator chamber 603 houses a flat-shaped biston 605 that slides freely in the vertical direction.
- Flat piston 6 05 It is connected via a through-pressure cylinder 607 provided above the housing 602 through the housing.
- This hydraulic cylinder 607 is mounted on a frame 608 provided on the upper part of the housing 602. According to this configuration, the piston 605 Slides up and down in the accumulator chamber 603, and the resin filled therein is compressed.
- a flat-shaped hole 609 is formed in the above-mentioned flat piston 605 in a vertical direction, and a flat mandrel 61 is passed through the hole 609.
- the upper end of the mandrel 610 is connected to an actuator 612 (cylinder mechanism) provided on the frame 608 via an intermediate member 611.
- actuator 612 cylinder mechanism
- core 6 1 3 this ⁇ core 6 1 3 lambda attached by the bolts ⁇ shape has tip is expanded, the die 6 1 4 ⁇ shape at predetermined intervals on the periphery Are provided so as to surround them.
- the die 6 14 is attached by a plate 6 16 to a lower housing 6 15 attached to the lower end of the housing 6.2.
- the feature of this embodiment is that, as shown in FIG. 23, a resin passage groove connecting the left and right surfaces of the core 613 with the tip of the bi-part core 613 in the direction of injection of the ribon, as shown in FIG. A plurality (four) of 6 18 are formed in the width direction of the core 6 13 with a gap between them, and when the parison 6 17 is injected from the gear gap between the flat die 6 14 ′ core 6 13 The difference is that the partition wall 6 19 is formed inside the hollow bipylon parison 6 17 by the resin passing through the resin passage 6 18.
- Each of the chambers 6 17 a, b, c, d, and e of the hollow parison 6 17 partitioned by the partition walls 6 19 has an air pipe 6 projecting downward from the lower surface of the flat core 6 13. Air is supplied from 20 (blow pin), and It is supposed to be. Each air pipe 6 2 0, the upstream measurement is set in the flat core 6 1 3 Contact and Motaira mandrel 6 1 within 0, is connected to an air Kyo ⁇ means (not shown) (such as air-presser) phi
- FIG. 25 shows the main part of the resin passage 618.
- the resin passage grooves 6 18 face the left and right sides of the flat core 6 13 so that the cross section of the flat core 6 13 is V-shaped.
- the grooves are formed so that the groove depths are gradually increased along the injection direction, and the right and left grooves 6 18 are connected within the core 6 13 before reaching the tip of the flat core 6 13. That is, the V-shaped apex 618a, which is the connecting point of the left and right grooves 618, is located above the tip surface 613a of the flat core 613. According to this configuration, as shown in FIG.
- the resin P i on the left side of the flat core 6 13 and the resin P 2 on the right side of the flat core 6 13 in the accumulator chamber 60 3 are partially separated from the left and right sides respectively. Then, through the groove 6 18, the flat core 6 13 merges into the hollow core parison 6 17 to be injected to form a partition wall 6 19 connecting the left and right sides.
- FIG. 27 is a view of the flat core 6 13 and the Bipei die 6 14 as viewed from below.
- a flat core 6 13 is attached to the tip of the Bihira mandrel 6 10 by a bolt 6 21.
- the tip of the flat core 6 13 is slightly larger than the hole diameter of the flat die 6 14, and by moving the mandrel 6 10 up and down, the gap between the die 6 14 and the core 6 13 is increased. Can be adjusted.
- Four resin passage grooves 618 are formed at the tip of the flattened core 613 at predetermined intervals in the width direction.
- Air pipes 62 are provided at the tips of the flat cores 6 13 divided into five by the resin passage grooves 6 18, respectively.
- a resin which is partitioned into right and left by the flat mandrel 6 1 0 in the accumulator chamber 6 0 3 is P i
- P 2 is flat die 6 1 4 Koh
- the flat core parison passes through the gap between the cores 6 13 and forms the left and right sides of the hollow flat parison 6 17, and the resin passages 6 18 on both the left and right sides of the core 6 13.
- four partition walls 6 19 are formed along the injection direction, as shown in FIG. 9 by no.
- Lison 6 1 7 Children inside divided into 5 rooms 6 1 7a, b, d, e
- the hollow bipari parison 617 having the partition walls 161 is sandwiched between left and right by a mold (not shown), and the air pipes 620 provided at the tip of the flat core 613 to the respective chambers 617. Air is blown for each of a, b, c, ci, and e. As a result, each of the chambers 6 17 a, i), c, (i, e) is blown in the mold by air blow to form a blow molded product.
- FIG. 28 shows the automobile seat 62 2 thus blow-molded.
- the mold that sandwiches the injected ⁇ Kuharahira Barison 6 17 is a mold that curves like a seat along the injection direction.
- the inside of the hollow flat parison 6 17 injected from the gap between the flat core 6 13 and the flat die 6 14 is spaced apart in the width direction. Since a plurality of partition walls 6 19 are formed along the injection direction, the partition walls 6 19 suppress the deformation of the hollow flat parison k due to the swell characteristics of the injection resin and the drawdown as shown in FIG. I do. Therefore, a sound thin hollow blow-molded product 62 is obtained.
- the injected hollow flat parison 6 17 has vertical wrinkles, correct it. Pre-blow is applied to each room 6 17 a, b, d, e partitioned by the partition wall 6 19. However, also at this time, the bulkhead 619 suppresses the expansion deformation of the Yuhei parison 617 which is about to expand due to the pre-blow air pressure.
- FIG. 30 shows a schematic view of the bending blow molding apparatus 70 1.
- the blow molding device 701 includes a hopper 700 for charging the resin material, an extruder 704 for transferring the resin material in the hopper 702 to the head portion 703, and a head portion 702. It mainly comprises an injection section 706 for injecting the resin in 3 downward as a hollow circular parison 705, and a mold 707 for sandwiching the injected parison 705 from left and right.
- FIGS. 29 (a) and 29 (b) show the main parts of the injection section 706.
- an accumulator chamber 708 for storing the resin sent from the extruder 704 is formed in the head section 703.
- the accumulator chamber 708 extends up and down. It is formed into a cylindrical shape having a diameter X and accommodates a vertically moving piston 709 in order to press and compress the resin downward.
- the piston 709 is connected to a hydraulic cylinder (not shown) provided above the head portion 703, and moves downward by extension of the hydraulic cylinder to compress and compress the resin. Things.
- the piston 709 is formed with a cylindrical hole 710 in the up-down direction, and a cylindrical mandrel 711 is inserted into the hole 7110.
- the upper end of the mandrel 711 is connected to an actuator (cylinder mechanism) provided in the head 703, and a cylindrical core 712 is attached to the lower end of the mandrel 711.
- the core 712 has an enlarged diameter at the front end, and a cylindrical die 13 is provided around the core 712 so as to surround the core. This die 13 is attached to the lower part of the head part 703. ⁇
- a resin passage groove 7 15 is formed, and when the parison 705 is injected from the gap 7 14 between the die 7 13 and the core 7 12, the resin passing through the resin passage groove 7 15 hollow inside of the circular path Rison 7 0 5 lies in that in order to form the partition walls 7 1 6 &
- the resin passage grooves 7 15 are formed so that the cross-section of the core 7 12 is V-shaped, and the cleaning depth is gradually increased along the injection direction on each of the opposite left and right side surfaces of the core 7 12.
- Right and left grooves 7 15 are formed in the core 7 12 just before reaching the tip of the core 7 12.
- Air is supplied to each room of the parison partitioned by the partition walls 7 16 from air pipes 7 17 (blow pins) projecting downward from the lower surface of the core 7 12, so that each air is blown. It has become. That is, as shown in FIG. 29 (b), a resin passage ⁇ 7 15 is formed in the core 7 12 provided inside the die 7 13 so as to divide the core 7 12 into a semicircle. are formed, the tip of the resin passage groove 7 1 5 by both semicircular core 7 1 2 divided into two, each air pipe 7 1 7 each! Apaipu 7 1 7 beta provided The upstream side is assembled in the core 71 and the mandrel 711, and is connected to air supply means (not shown) (not shown).
- the resin material charged into the hopper 702 is filled into the accumulator chamber 708 in the head section 703 through the extruder 704, and the piston 7 It is pressurized and compressed by 9 and injected from the gap 7 14 between the die 7 13 and the core 7 12 as a hollow circular parison 705 toward the lower mold 707.
- the resin on the side of the core 71 2 in the accumulator chamber 708 The part is guided toward the center of the core through a resin passage formed at the tip of the core and is merged in the core 712, and is separated inside the hollow circular parison 705 to be injected.
- the mold 7 07 that can be divided into right and left is closed, and in this state, the blower 7 1 8 that sucks out the air in the mold 7 0 7 Is started.
- the hollow circular parison 705 with a partition wall injected into the mold 707 follows the flow of air in the bent cavity 71 a and follows the shape of the bent cavity 71 a.
- the upper and lower shutters (not shown) provided at the upper and lower ends of the mold 707 are closed, and the parison is provided on the lower surface of the core 712. From the air pipe 7 17, air is blown into each room in the parison 705 separated to the left and right by the partition wall 7 16, and air is blown. At the same time, the blower 7 18 is stopped.
- FIG. 31 shows a pipe-shaped bent blow molded product 720 produced in this manner. As shown in the figure, a partition wall 716 partitioning the inside along the longitudinal direction is formed inside the molded product 720.
- the molded product 720 shown in FIG. 31 is compared with a product obtained by bundling a plurality of pipes having the same function, the molded product 720 can promote space saving.
- the resin passage grooves 715 are radially formed at the tip of the core 712 as three or four as shown in FIG. 32 (a), and are partitioned by the resin passage grooves 715.
- Air pipes 717 may be provided on the lower surfaces of the respective cores. in this case, The resulting sigma-molded product is cut into three rooms and four rooms: fct.
- a bent cavity 7119a is formed in a mold 707 as shown in FIG. 30 and a bent molded product 720 as shown in FIG. 31 is formed.
- the straight cavity may be formed in the mold 707 to manufacture a straight-shaped molded product.
- the present invention is suitable for use in a Jiangping blow molding apparatus, a Jiangping blow molding method, and a Bipyeong blow molding product.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69317842T DE69317842T2 (de) | 1992-04-20 | 1993-04-20 | Flachblasformmaschine, flachblasformverfahren und produkte durch flachblasformen |
EP93908118A EP0590160B1 (en) | 1992-04-20 | 1993-04-20 | Flat blow molding apparatus, flat blow molding method and product of flat blow molding |
Applications Claiming Priority (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9970892A JP3106677B2 (ja) | 1992-04-20 | 1992-04-20 | 偏平ブロー成形装置 |
JP4/99708 | 1992-04-20 | ||
JP4/122111 | 1992-05-14 | ||
JP04122111A JP3118954B2 (ja) | 1992-05-14 | 1992-05-14 | 偏平ブロー成形装置 |
JP12745992A JP3196316B2 (ja) | 1992-05-20 | 1992-05-20 | ブロー成形装置 |
JP4/127459 | 1992-05-20 | ||
JP4/133624 | 1992-05-26 | ||
JP13362492A JPH05318563A (ja) | 1992-05-26 | 1992-05-26 | ブロー成形方法ならびに成形装置および成形品 |
JP16299692A JP3196326B2 (ja) | 1992-06-22 | 1992-06-22 | 偏平ブロー成形装置 |
JP4/162996 | 1992-06-22 | ||
JP4/175492 | 1992-07-02 | ||
JP17549292A JP3125443B2 (ja) | 1992-07-02 | 1992-07-02 | 偏平ブロー成形装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993020997A1 true WO1993020997A1 (en) | 1993-10-28 |
Family
ID=27552076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/000509 WO1993020997A1 (en) | 1992-04-20 | 1993-04-20 | Flat blow molding apparatus, flat blow molding method and product of flat blow molding |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE69317842T2 (ja) |
WO (1) | WO1993020997A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62148214A (ja) * | 1985-12-23 | 1987-07-02 | Teraoka Giken Kk | パリソンコントロ−ル付異形ダイ |
JPS6357208A (ja) * | 1986-08-28 | 1988-03-11 | Teraoka Seisakusho:Kk | ブロ−ダイ |
JPH02206527A (ja) * | 1989-02-03 | 1990-08-16 | Placo Co Ltd | ブロー成形機における材料替え装置 |
JPH02292017A (ja) * | 1989-05-01 | 1990-12-03 | Ube Ind Ltd | ブロー成形機のダイス |
-
1993
- 1993-04-20 DE DE69317842T patent/DE69317842T2/de not_active Expired - Fee Related
- 1993-04-20 WO PCT/JP1993/000509 patent/WO1993020997A1/ja active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62148214A (ja) * | 1985-12-23 | 1987-07-02 | Teraoka Giken Kk | パリソンコントロ−ル付異形ダイ |
JPS6357208A (ja) * | 1986-08-28 | 1988-03-11 | Teraoka Seisakusho:Kk | ブロ−ダイ |
JPH02206527A (ja) * | 1989-02-03 | 1990-08-16 | Placo Co Ltd | ブロー成形機における材料替え装置 |
JPH02292017A (ja) * | 1989-05-01 | 1990-12-03 | Ube Ind Ltd | ブロー成形機のダイス |
Non-Patent Citations (1)
Title |
---|
See also references of EP0590160A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE69317842T2 (de) | 1998-09-17 |
DE69317842D1 (de) | 1998-05-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4363619A (en) | Apparatus for making wide mouth container | |
US5662842A (en) | Process for blow molding hollow objects with independent movement of mold halves | |
CN109732876B (zh) | 一种用于生产高精度塑料桶的吹塑设备 | |
CN111844684A (zh) | 一种多料道挤塑模头 | |
WO1993020997A1 (en) | Flat blow molding apparatus, flat blow molding method and product of flat blow molding | |
CN208543804U (zh) | 一种汽车座椅吹塑模具 | |
US6033204A (en) | Flat blow molding machine, flat blow method and products of flat blow molding | |
CN212795820U (zh) | 一种多料道挤塑模头 | |
CA1328155C (en) | Method of blow molding a flat container having portions with greatly varying wall thicknesses | |
EP0590160A1 (en) | Flat blow molding apparatus, flat blow molding method and product of flat blow molding | |
CN214395369U (zh) | 挤出机热熔型坯壁厚调节设备 | |
CN221212703U (zh) | 一种塑料容器加工用多角度吹塑装置 | |
KR102647106B1 (ko) | 패리슨 성형용 수지 압출기 및 이를 포함하는 블로우 사출 성형 장치 | |
JPH0342228A (ja) | 中空長尺物吹込成形装置 | |
JP2596457B2 (ja) | 扁平な中空体のブロー成形装置 | |
JP2596456B2 (ja) | 扁平な中空体のブロー成形方法 | |
CN220499830U (zh) | 全地形车脚踏板动定模双向顶出机构 | |
JP4609681B2 (ja) | 合成樹脂製中空管のブロー成形方法及びその装置 | |
CN220784823U (zh) | 一种发泡板材挤出模具 | |
CN218118755U (zh) | 一种外观产品模内吹氮气结构 | |
CN214353896U (zh) | 一种生产汽车配件的模具 | |
JPH0716998B2 (ja) | 圧着成形方法 | |
JP2000343589A (ja) | ブロー成形機及びその制御方法 | |
JP6913567B2 (ja) | 電動式インジェクションブロー成形装置 | |
JPH07314538A (ja) | 表面平滑性に優れたブロー成形品の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1993908118 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref country code: US Ref document number: 1994 167868 Date of ref document: 19940127 Kind code of ref document: A Format of ref document f/p: F |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWP | Wipo information: published in national office |
Ref document number: 1993908118 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref country code: US Ref document number: 1996 585807 Date of ref document: 19960116 Kind code of ref document: A Format of ref document f/p: F |
|
WWG | Wipo information: grant in national office |
Ref document number: 1993908118 Country of ref document: EP |