• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    At the bottom of the bottle by the stretch blow, a hanging tool with a straight umbrella-shaped hook is made moldable by improvement of the bottom structure of the preform and the stretch blow means. It is a thin bottle 1 molded by stretching and blowing the injection-molded preform 2. In the center of the bottom part 13 formed in concave in a bottle, the hanging hole of the umbrella-shaped hook which consists of the support | pillar 14 and the flange 15 is provided. The hanging sphere is formed of a flange and a sprue base end integrally formed around the sprue of the bottom surface of the preform.
    公开号:KR20040012505A
    申请号:KR1020030051948
    申请日:2003-07-28
    公开日:2004-02-11
    发明作者:이시카와히로시
    申请人:가부시키가이샤 아오키가타시겐큐쇼；
    IPC主号:
    专利说明:

    Bottles with hanging spheres at the bottom, molding method thereof and injection mold {BOTTLE HAVING HANGING TOOL AT BOTTOM AND MOLDING METHOD THEREOF, AND INJECTION MOLD}
    [22] TECHNICAL FIELD This invention relates to the bottle which has the hanging tool which can be hanged upside down in the bottom part of the thin blow-molded thin bottle, its shaping | molding method, and an injection mold.
    [23] Some fluid bottles that can be suspended are integrally molded with a pinned off portion at the bottom of the bottle by direct blow molding, but the hanging pieces are formed to protrude outward from the ground plane. Even if a piece is bendable, it has a problem that it becomes an obstacle and cannot be conveyed or filled by standing like a bottle.
    [24] In addition, even bottles made by stretching and blow-molding preformed injection-molded preforms are formed so that the bottom surface is raised, so that the hanging pieces can be bent in the recesses formed in the bottom, or the sprues are squashed flat. Although some may be formed on the hanging piece, the size of the hanging piece is limited because the height of the recess is limited, and a satisfactory piece cannot be formed, and a special bottom mold is required for forming the hanging piece. The cost is likely to be high because of the need for secondary processing.
    [25] As the hanger of the bottom of the bottle, the hook having the shape of an umbrella shape is most simple and certain, but it is very good to vertically shape the bottom of the bottle shape of the bottle by stretching blow molding because of the deformation of the bottom at the time of molding. It is difficult, and even if it is slightly inclined, since it is treated as a defective product, a yield is bad and it has a subject that it is difficult to carry out.
    [26] The present invention has been considered in view of the above circumstances, and an object thereof is, by improving the bottom structure of the preform and the stretching blow means, a bottle which can be provided as a hanging sphere by a straight umbrella-shaped hook, and It is providing the molding method of a bottle, and an injection mold.
    [1] 1 is a longitudinal sectional front view of a main portion of a bottle having a hanging sphere of the present invention at its bottom;
    [2] 2 is a bottom view of the drawing,
    [3] 3 is a longitudinal sectional view of an injection mold;
    [4] 4 is an enlarged cross-sectional view of the bottom mold part of the figure;
    [5] Fig. 5 is a longitudinal sectional view of an essential part of the blow mold showing the restriction position of the axial stretching;
    [6] 6 is a longitudinal sectional view of an essential part of a blow mold showing an air blow state;
    [7] It is a principal part longitudinal cross-sectional view of the blow mold which shows the shaping | molding state of a bottle bottom part.
    [8] <Explanation of symbols for main parts of the drawings>
    [9] One … Illness 11. Neck
    [10] 12... Body 13. Bottom
    [11] 14. Landlord 15. flange
    [12] 2 … Preform 23. Bottom
    [13] 24. Sprue end 25. flange
    [14] 26: sprue tip 3. Injection mold
    [15] 31. Injection cavity mold 32... Injection core mold
    [16] 33. Bottom mold 4. Neck mold
    [17] 6. Core member 7... Valve nozzle
    [18] 8 … Support 9. Opening and closing cylinder of bottom mold
    [19] 100... Blow mold 101. Cavity mold
    [20] 102. Blow cavity 103... Lower opening
    [21] 105. Bottom mold 107. Stretched rod
    [27] The bottle of the present invention according to the above object comprises a thin bottle molded by stretching and blowing an injection-molded preform, and a hanging sphere protruding from the bottom portion formed concave in the bottle, and the hanging sphere is a sprue of the preform bottom portion ( It consists of a flange integrally formed around a sprue, and an umbrella-shaped hook by the sprue base end left as a support | pillar of this flange.
    [28] The molding method of the present invention forms the preform bottom portion thinner than the body portion to make it easier to cool and harden, and integrally forms a flange that becomes an umbrella-shaped hook around the sprue of the preform bottom portion. When blow-molding a preform into a thin bottle by a blow mold and a draw rod having a bottom mold formed by drilling, pre-stretching of the preform by the stretching rod is performed, and the stretching is performed by the blow cavity of the outer surface of the preform. It restrict | limits until it arrange | positions on the mold surface of the bottom metal mold | die in the inside, and prevents compressive deformation of the preform bottom surface by an extending rod and a bottom metal mold | die.
    [29] The injection mold of the present invention includes an injection cavity mold for molding a body of a preform, a bottom mold for forming a connection between a bottom portion and a body portion of the preform, and a neck for forming a neck portion of the preform by closing an opening and a mold of the injection cavity. It consists of a mold and an injection core mold penetrated through the neck mold to the bottom mold, and the said bottom mold is comprised so that opening and closing is possible with a pair of dividing die, and the umbrella shape of the bottle bottom part is opened and closed on the dividing die. The sprue base end which has the shaping | molding recessed part of the flange used as a hook is provided.
    [30] Embodiment of the Invention
    [31] 1 and 2 are bottles 1 for infusion of polypropylene (PP), the body portion 12 continuous to the neck portion 11 and the bottom portion 13 formed concave in the bottle, the neck portion Stretch blow molding is carried out thinner than (11), and the hanging sphere of the umbrella-shaped hook which consists of the support | pillar 14 and the flange 15 is formed in the center of the bottom part 13 integrally.
    [32] The bottle 1 with the hanging sphere is a preform 2 in which the neck portion 21, the body portion 22 and the bottom portion 23 are integrally injection molded using the injection mold shown in FIG. 3. ), A thin blow-molded using the blow mold 100 shown in Fig. 5 or less, sprue base end 24 formed in the center of the bottom of the preform (2), and around the sprue The integrally formed flange 25 becomes the support | pillar 14 and the flange 15 which protruded and formed in the outer bottom surface of the bottle bottom part 13, respectively, and forms the hanging hole of an umbrella-shaped hook.
    [33] FIG. 3 shows the injection mold of the preform 2, which forms an injection cavity mold 31 for forming the body portion 22 of the preform 2, and a connection portion between the bottom portion 23 and the body portion. The bottom mold 33, the neck mold 4 which closes the opening part and injection mold of the injection cavity mold 31, and forms the neck part 21 of the preform 2, and the bottom mold penetrates through the neck mold 4 The injection core mold 32 inserted up to 33 is formed.
    [34] The neck mold 4 is a pair of mold members attached to the lower surface of the transfer panel 5 provided on the upper part of the injection cavity mold 31 so as to be lifted and lowered, with a member 51 so as to be able to open and close laterally. The said injection core metal mold | die 32 is attached to the lower side of the core member 6 which can be raised and lowered and fitted in the inside.
    [35] The bottom mold 33 is a pair of opening and closing split molds 33a and 33b which are fitted between a lower end of the injection cavity mold 31 and a support 8 having a convex upper end provided directly below it. The sprue base end part 24 which becomes a channel | path of resin which consists of these, and the flange shaping recessed part was provided in the opening-and-closing surface of the dividing metal mold | die 33a, 33b. Further, the lower side of the opening and closing surface is fitted with the upper end of the support 8, and is formed in the recess so that the mold closing surface is located at the center of the injection cavity mold 31.
    [36] Moreover, the valve nozzle 7 is inserted in the support stand 8 hollow. The distal end of the valve nozzle 7 abuts through an insulating paper to an opening in the upper end center of the support 8 positioned as an extended end of the sprue base end 24, thereby melting from the valve nozzle 7. The resin passes through the sprue base end 24 and flows into the cavity formed by the injection cavity mold 31 and the injection core mold 32.
    [37] The injection-molded molten resin has a neck portion 21, a body portion 22, and a flat bottom portion 23 in the cavity, each of the neck mold 4, the injection cavity mold 31, and the bottom mold 33, respectively. It becomes the preform 2 formed integrally by this. 4, in the sprue base end part 24, the sprue base end part 24 in which the flange 25 was formed is connected in the center of the outer bottom surface of the bottom part 23. As shown in FIG.
    [38] The mold separation of the injection-molded preform 2 precedes the opening of the bottom mold 33 and then lifts the injection core mold 32 out of the preform 2, and then opens the neck mold 4 upward. The preform 2 is removed from the injection cavity mold 31 or the extraction from the injection cavity mold 31 is performed first to separate the mold. The hot air of the bottom mold 33 connects the piston 10 to the outer ends of each of the split molds 33a and 33b, and fixes the cylinder body 9 to the outer body 34 of the injection cavity mold 31. Or by an opening / closing cylinder of hydraulic operation.
    [39] When the bottom portion 23 of the preform 2 is deformed by the pressing force of the stretching rod at the time of stretch blow molding, the verticality of the sprue base end portion 24 is impaired. It is formed remarkably thick (for example, 3.4 mm) and thinner (1.2 mm) than the trunk portion 22, so that when the preform 2 is separated from the high temperature mold, it is already cooled and hardened so as not to be deformed. The preform 2 after the mold separation holds the neck portion 21 by the neck mold 4, is transferred to a preforming mold or blow mold 100 (not shown), and stretch blow molding the bottle 1. do.
    [40] As shown in FIG. 5 and below, the blow mold 100 includes a cavity mold 101 by a pair of opening and closing split molds, and a blow cavity 102 of an upper opening formed by closing of the cavity mold 101. The bottom mold 105 is accommodated in the bottom opening 103 formed in the bottom of the blow cavity 102 so as to be lifted and lowered so that the mold surface can be moved in and out of the cavity by the piston rod 104 connected downward. The vertical hole of the diameter accommodated in the contact surface of the front-end | tip member 107a of the extending rod 107 by the diameter slightly larger than the said flange 25 in the center of the metal mold surface of the bottom metal mold 105, It is formed as a receiving hole 106 of the sprue base end 24.
    [41] In the blow mold 100, the closing of the mold surface is performed in the state in which the mold surface is positioned in the lower opening due to the drop of the bottom mold 105, and the drawing is omitted in the drawing, but the upper opening of the blow cavity 102 and the neck mold ( 4) is closed so that the preform 2 is held in the center of the cavity 102. After the mold is closed, a blow core (not shown) having the drawing rod 107 installed therein is fitted to the neck mold 4, and the tip member 107a of the drawing rod 107 abuts against the inner bottom of the preform. , Axial stretching by stretching of the stretching rod 107 and stretching blow molding by expansion by air blow from the blow core are performed, so that the bottle 1 is molded. Since the preform bottom portion 23 is already cured at the time of axial stretching, it is not deformed by the stretching force and maintains the thickness and shape during injection molding.
    [42] In normal drawing blow molding, the axial stretching of the preform 2 by the stretching rod 107 is brought into contact with the mold surface of the bottom mold 105 in which the bottom 23 of the preform 2 protrudes into the cavity. It is performed until it is extended. However, in such stretching, since the bottom 23 deforms and the sprue proximal end 24 is inclined, in order to avoid deformation due to compression stretching, the axial stretching is shown in FIG. 5, where the mold faces protrude into the cavity. It restrict | limits to until it arrange | positions with required space S (for example, about 1.2 mm) on top.
    [43] When air blow is performed in this state, as shown in FIG. 6, the trunk | drum 22 of the preform 2 expands a cavity full from the upper part to the lower part, and the bottom part 23 which hardened | cured was hardened around the bottom part. Of the bottom die 105 is pushed down to the mold surface of the bottom die 105, but the bottom portion 23 maintains the thickness when injection-molded by hardening, and the sprue base end portion 24 receives the receiving hole 106. Since it is located directly above, it is accommodated in the accommodation hole 106 together with the flange 25 around it. Since the flange 25 also serves as a guide of the sprue base end 24 in this accommodation process, the sprue base end 24 is accommodated in the accommodation hole 106 without being inclined. In addition, since the position of the flange 25 is prevented from shifting even when the bottom part 23 is not clamped between the bottom mold 105 and the extending rod 107 at the time of air blow, the sprue by air blow The center shift of the base end 24 becomes difficult to occur.
    [44] When the bottom mold 105 is raised with air pressure applied after the air blow and the mold surface is pushed up to the set position in the cavity, the bottom portion 23 is pushed into the bottle together with the circumference thereof, as shown in FIG. It becomes the bottom part 13 of the bottle 1 connected with the trunk | drum 12 shape | molded thinly. Moreover, in the shaping | molding of the bottom part 13 by pushing up of the bottom metal mold 105, since the said extending rod 107 is stopped in the elongation limit position, the extending rod 107 at the time of raising a bottom metal mold can be moved simultaneously. It is not necessary, and even when the mold surface of the bottom die 105 has reached the set position, the space S at the time of extension is the bottom 13 of the bottle 1 and the tip member 107a of the stretching rod 107. Since the space S 'is secured as a space S), even if the stretching rod 107 is stopped at that position, no load is applied to the stretching rod 107.
    [45] The heat after blow molding precedes the mold separation of the bottom portion 13 due to the lowering of the bottom mold 105, and then holds the bottle 1 in the neck mold 4 to remove the blow core and the cavity mold. Open it. The bottle 1 is cut by the sprue tip part which protruded from the flange 15, and the bottle 1 by which the hanging tool by the umbrella-shaped hook like the one shown in FIG. This is done. This makes it possible to blow blow molding of a good quality bottle equipped with a hanging hook of an umbrella-shaped hook which is considered to be difficult to mold.
    [46] In the above embodiment, the bottom mold 105 is raised after the blow to form the bottom of the bottle. However, the bottom mold may have the mold surface protruded into the cavity before the blow, and in this case, the space S at the time of stretching is also achieved. The space S 'after the blow molding is secured. The molding material may be polyethylene terephthalate (PET), polyethylene (PE), or the like.
    [47] At the bottom of the bottle by the stretch blow, the hanging sphere with the straight umbrella-shaped hook is made moldable by the improvement of the bottom structure of the preform and the stretch blow means.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] It consists of a thin bottle formed by stretching and blowing an injection molded preform, and a hanging hole protrudingly installed in the bottom formed concave in the bottle, and the hanging hole is formed around the sprue of the bottom of the preform. A bottle having a hanging sphere on a bottom portion, comprising: a flange integrally formed in the base and an umbrella hook formed by a sprue base end left as a support of the flange.
    [2" claim-type="Currently amended] It has a bottom mold formed by forming the preform bottom part thinner than the body part to make it easier to cool and harden, and integrally forming a flange that becomes an umbrella-shaped hook around the sprue of the preform bottom part, and forming the receiving hole of the flange through the mold surface. When blow-molding the preform into a thin bottle by the blow mold and the stretching rod, the stretching of the preform by the stretching rod is preceded, and the stretching is performed by the outer mold of the bottom mold in the blow cavity. A method of forming a bottle having a hanging sphere in a bottom portion, characterized by being limited to the required space on the mold surface until it is positioned, thereby preventing compression deformation of the preform bottom surface by the stretching rod and the bottom mold. .
    [3" claim-type="Currently amended] An injection cavity mold for molding the body of the preform, a bottom mold for molding the bottom portion of the preform and the body portion, a neck mold for forming the neck portion of the preform by closing the opening and the mold of the injection cavity, and the neck mold. It consists of an injection core mold penetrated and inserted into the bottom mold, and the bottom mold is configured to be opened and closed by a pair of divided molds, and a molding recess of a flange which becomes an umbrella-shaped hook at the bottom of the bottle on the opening and closing surface of the divided mold. An injection mold comprising a sprue proximal end having a portion.
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    同族专利:
    公开号 | 公开日
    TW200401700A|2004-02-01|
    JP2004059129A|2004-02-26|
    CN1483567A|2004-03-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2002-07-31|Priority to JP2002223837A
    2002-07-31|Priority to JPJP-P-2002-00223837
    2003-07-28|Application filed by 가부시키가이샤 아오키가타시겐큐쇼
    2004-02-11|Publication of KR20040012505A
    优先权:
    申请号 | 申请日 | 专利标题
    JP2002223837A|JP2004059129A|2002-07-31|2002-07-31|Bottle having hanger on bottom, its molding method and injection-molding die|
    JPJP-P-2002-00223837|2002-07-31|
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