JP3768699B2 - Mold for bottle molding with handle - Google Patents

Description

【００４６】
結果
表１から明らかなように、把手内側形成部○４の温度は、実施例１の直列型を用いた場合は２１〜２３℃、実施例２の場合は２８〜３４℃と、いずれも、比較例１の３７〜４４℃に比較して低温まで温度調整が可能となり、把手付きボトルの形状等に応じた成形条件を設定することができる。
【００４７】
【発明の効果】
この発明によれば、金型を母型と入れ子型に分けたので、入れ子型のみを目的のボトルの形状に応じて揃えればよく、母型は共通して使用でき、把手付きボトル成形用金型の作製を合理化することができる。さらに、入れ子型のみだと重量が減るので、金型交換作業がより容易となる。
【００４８】
また、第１媒体管路を母型に設けたので、入れ子型にこの媒体管路を設ける必要がなく、入れ子型の作製が容易となる。さらに、切替え装置により、第２媒体管路と第３媒体管路とを直列に連通させたり、媒体導入管から第２媒体管路及び第３媒体管路へ連通させたりすることを可能としたので、口栓部用金型と把手内側形成部の流量調整を行うことができる。
【００４９】
さらにまた、切替え装置の媒体導入管と口栓部導入管との連結部に流量調整ピンを介在させたので、この連結部の径と流量調整ピンの軸の太さ等を調整することにより、冷媒が口栓部用金型及び、把手内側形成部に流れる量を調整することが可能となる。
【００５０】
また、延伸ブロー成形し、冷却した後に得られたボトルを取り出すとき、把手排出装置によって把手の取り出しが容易となる。さらに、この把手排出装置は、第１の半割り型の入れ子型と着脱自在に設けられるので、入れ子型の交換が容易となる。
【図面の簡単な説明】
【図１】第１の半割り型の例を示す正面図
【図２】（ａ）（ｂ）（ｃ）切替え装置の他の例を示す正面図
【図３】（ａ）母型の例を示す正面図
（ｂ）（ａ）の左側面図
（ｃ）（ａ）の右側面図
（ｄ）（ａ）の平面図
【図４】（ａ）口栓部用金型の例を示す正面図
（ｂ）（ａ）の平面図
【図５】（ａ）入れ子型の例を示す正面図
（ｂ）（ａ）の右側面図
（ｃ）（ａ）のＡ−Ａ断面図
【図６】（ａ）切替え装置の例を示す正面図
（ｂ）（ａ）のＢ−Ｂ断面図
（ｃ）（ｂ）のＣ−Ｃ断面図
【図７】（ａ）（ｂ）（ｃ）流量調整ピンの他の例を示す正面図
【図８】（ａ）把手排出装置を組み込んだ第１の半割り側の例を示す正面図
（ｂ）（ａ）のＤ−Ｄ断面図
（ｃ）（ａ）のＥ−Ｅ断面図
【図９】把手付きボトルの例を示す正面図
【図１０】従来の半割り型の例を示す正面図
【符号の説明】
１ ボトル
２ 把手
３ 端部
４ 突起部
５ 口栓部用金型
６ 把手組込部
７ 媒体管路
８ 媒体管路
９ 媒体管路
１１ 把手内側形成部
２１ 第１の半割り型
２２ 第２の半割り型
２３ 把手組込部
２４ 口栓部用金型
２５ キャビティ
２６ 入れ子型
２７ 母型
２８ キャビティ
２９ 入れ子型
３０ 半割り型
３１ 母型
３２ 第１媒体管路
３３ 導入管
３４ 案内管
３５ 排出管
３６ 第２媒体管路
３７ 口栓部導入管
３７’ 接続部
３８ 口栓部案内管
３９ 口栓部排出管
４０ キャビティ
４１、４１’ キャビティ
４２ 把手内側形成部
４３ 第３媒体管路
４４ 把手部導入管
４４’ 接続部
４５ 把手内側案内管
４６ 把手部排出管
４６’ 接続部
４７ 連結管
４８ 連結管
５１ 切替え装置
５２ 媒体導入管
５２’ 接続部
５３ 連結部
５４ 流量調整ピン
５５ 本体部
５６ ネジ穴
５７ 鍔部
６１ 把手排出装置
６２ ロッド
６３ ピストン
６４ａ，６５ｂ 空気導入項
６５ 重なり合い面
６６ スプリング式温度計[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold for manufacturing a bottle with a handle.
[0002]
[Prior art]
As shown in FIG. 9, a bottle with a handle is one in which a handle 2 is inseparably connected to a bottle 1. In this bottle with a handle, an already formed handle is incorporated into a mold, and a bottomed parison is inserted to perform stretch blow molding. At this time, the bottomed parison extends so as to wind up the protrusions 4 at both ends 3 of the handle, and the bottle and the handle are inseparable.
[0003]
The mold for forming a bottle with a handle used at this time is one in which a body mold having a cavity that forms a main body portion of a bottle and a mold for a plug portion having a cavity that forms a plug portion are integrated. In the following description, the body mold and the plug mold will be described separately.
[0004]
As shown in FIG. 10, the mold for forming a bottle with a handle includes two half molds 30 that form a body mold having a cavity 40 that forms a main body part of the bottle, and a cavity 41 that forms a plug part. It is comprised from the die 5 for plug parts which has'. Furthermore, a handle built-in portion 6 is formed in the half mold 30.
[0005]
In addition, the medium pipe 7 for heating or cooling the half mold 30 is provided inside the half mold 30 on the outer peripheral portion and the bottom of the cavity 40, and the inside is heated or cooled. Medium is distributed. Furthermore, the handle inner forming portion 11, which is a part of the half mold 30, between the handle incorporating portion 6 and the cavity 40 and forming the inner portion of the handle 2, A medium conduit 8 for cooling 11 is provided, and the cooled medium circulates therethrough. Furthermore, a medium conduit 9 for cooling the plug part mold 5 is provided around the cavity 41 ′ of the plug part mold 5, and the cooled medium flows therethrough.
[0006]
By circulating a heated or cooled medium through the medium pipe line 7, the inside of the half mold 30 can be heated or cooled, and the half mold 30 can be kept warm or cooled after stretch blow molding. it can. Also, by allowing the cooled medium to flow through the medium pipes 8 and 9, the handle inner side forming portion 11 inside the handle 2 and the cap portion mold 5 are cooled separately from the other bottle body portions. Can do. By maintaining a predetermined temperature, the bottle body aligns and crystallizes the resin forming the bottle, and improves heat resistance while maintaining transparency. And deformation | transformation is prevented by cooling. Further, unlike the other main body portions of the bottle, the main body portion of the bottle and the cap of the bottle located inside the handle 2 are not easily stretched, so that they tend to be thick and heat tends to accumulate. For this reason, the moldability is improved by cooling these portions.
[0007]
[Problems to be solved by the invention]
By the way, although it is necessary to prepare various molds according to the shape of the bottle to be molded, it is very expensive to manufacture the mold according to each shape. Furthermore, since the above-mentioned mold is heavy, in the case of work such as mold exchange, it becomes heavy labor.
[0008]
Further, the medium conduit 8 for cooling the grip inner side forming portion 11 and the medium conduit 9 for cooling the plug mold 5 are connected in parallel. The bottle cap can be prevented from being deformed by cooling more and more, and the moldability can be improved. However, if the main body of the bottle located inside the handle is cooled too much, the portion is cooled without being sufficiently stretched in stretch blow molding. Thereby, sufficient resin does not go to the main body part of the bottle on the side with the handle, and the bottle in this part tends to become thin. On the contrary, if the cooling is insufficient, the heat accumulated in the main body portion of the bottle located inside the handle is not sufficiently removed, and the transparency of this portion tends to decrease. Therefore, it is necessary to adjust the amount of refrigerant flowing through each of the medium pipe line 8 and the medium pipe line 9.
[0009]
Accordingly, an object of the present invention is to make it possible to rationalize the mold and to adjust the amount of refrigerant to be circulated through the handle inner side forming part and the plug part mold.
[0010]
[Means for Solving the Problems]
  In order to solve the above-mentioned problems, the present invention comprises a barrel mold having a cavity for molding a main body portion of a bottle, and a plug portion mold having a cavity for forming a bottle plug portion. The body mold includes first and second half-divided molds having a handle built-in part, and a handle is incorporated into the first half-divided handle built-in part, and the first and second half molds are assembled. Forming a bottle with a handle used to manufacture a bottle with a handle by inserting a bottomed parison between the split molds and performing stretch blow molding with the first and second half molds overlapped. In the metal mold, each of the first and second half molds includes a nested mold having a cavity for molding the main body, and a mother mold that covers an outer peripheral portion and a bottom of the nested mold. The first medium pipe is provided, and the cap part gold The second medium conduit is provided, the third medium conduit provided in handle inner forming portion formed between the nested cavity and the handle incorporating unit in,The start end of the second medium conduit, the start end of the third medium conduit, and the end of the third medium conduit are connected to the switching device, and a medium introduction pipe for introducing a medium from the outside is connected to the switching device. The connection state of the medium introduction pipe, the start end part of the third medium pipe line, the end part of the third medium pipe line, and the start end part of the second medium pipe through the switching device is as follows: Any one of (1) to (3) is characterized.
(1) The medium introduction pipe communicates with the start end portion of the third medium conduit, and the terminal end portion of the third medium conduit and the start end portion of the second medium conduit communicate with each other.
(2) The medium introduction pipe communicates with the starting end of the second medium pipe line.
(3) The medium introduction pipe communicates with the start end portion of the third medium conduit, and the terminal end portion of the third medium duct and the start end portion of the second medium duct communicate with each other. The two media pipes communicate with the starting end.
[0011]
Of the molds for forming bottles with handles, the two half molds that form the body mold are divided into two: a nested mold and a mother mold, so that the mother mold can be used as it is and a nested mold having a cavity of a predetermined shape. By exchanging the mold, bottles having different shapes can be formed. Therefore, it is only necessary to arrange the nested molds according to the shape of the target bottle, and the master mold can be used in common. For this reason, the production of the mold for forming a bottle with a handle can be rationalized. In addition, since the weight is reduced only with the nested type, the mold exchanging work becomes easier.
[0012]
  Furthermore, since the medium pipe for heating and cooling the bottle body is provided in the mother die, it is not necessary to provide the medium pipe in the nested die, and the production of the nested die is facilitated. Furthermore,The communication states of the medium introduction pipe, the start end of the third medium pipe, the end of the third medium pipe, and the start of the second medium pipe through the switching device are described above (1) to (1). By doing any of (3)The flow rate of the grip inner side forming part and the plug part mold can be adjusted.
[0013]
  The second medium conduit is composed of a plug introduction pipe for introducing the medium, a plug guide pipe for guiding the medium through the plug mold, and a plug discharge pipe for discharging the medium. Further, the third medium pipe line is composed of a handle part introduction pipe for introducing the medium, a handle inner side forming part guide pipe for guiding the handle inner side forming part, and a handle part discharging pipe for discharging the medium, The switching device connects a medium introduction pipe for introducing a medium from the outside to the handle section introduction pipe, connects the handle section discharge pipe to the plug section introduction pipe, and the medium introduction pipe and the plug section introduction pipe. In addition, a flow rate adjusting pin is interposed in the connection part between the medium introduction pipe and the plug part introduction pipe,The flow rate can be adjusted by adjusting the diameter of the connecting part or the thickness of the flow rate adjusting pin.It can be characterized by being a device that can.
[0014]
Since the flow rate adjustment pin is interposed in the connection part between the medium introduction pipe and the plug part introduction pipe of the switching device, the refrigerant is adjusted by adjusting the diameter of the connection part and the thickness of the flow rate adjustment pin. It becomes possible to adjust the quantity which flows into a metal mold | die and a handle inner side formation part.
[0015]
Further, the handle discharging device is located on a side adjacent to the first half-divided handle incorporating portion, on the side opposite to the side where the first half-divided surface overlaps the second half-divided die. Can be detachably attached to the telescopic mold.
[0016]
When the bottle obtained after stretch blow molding and cooling is taken out, the handle can be easily taken out by the handle discharging device. Further, since the handle discharging device is detachably provided with the first half-type nesting type, the nesting type can be easily replaced.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0018]
As shown in FIG. 9, the bottle with a handle formed using the mold for forming a bottle with a handle according to the present invention is obtained by integrally connecting the handle 2 to the upper part of the peripheral surface of the bottle 1. Protrusions 4 are provided at both ends 3 of the handle 2, and the protrusions 4 bite into the bottle 1.
[0019]
The above-mentioned mold for forming a bottle with a handle used for manufacturing the bottle with a handle includes a body mold having a cavity for forming a main body portion of the bottle, and a cavity for forming a cap portion of the bottle. It is comprised from the metal mold | die for plug parts which has. Moreover, although not shown in figure, it is good also as a structure which has separately the bottom type | mold for shape | molding the bottom face of a bottle.
[0020]
As shown in FIG. 1, the body mold includes a first half mold 21 and a second half mold 22 (see FIG. 8C) having a handle assembly portion 23. The plug part mold 24 is divided in half so as to be placed on the first half mold 21 and the second half mold 22. The plug part mold may be integrated without being divided in half.
[0021]
As shown in FIG. 1, the first half mold 21 includes a nested mold 26 having a cavity 25 for molding a bottle main body, and a mother mold 27 that covers an outer peripheral portion and a bottom of the nested mold 26. . Further, as shown in FIG. 8 (c), the second half mold 22 covers a nested mold 29 having a cavity 28 for molding the bottle main body, and an outer peripheral portion and a bottom of the nested mold 29. It consists of a matrix 31.
[0022]
The nesting molds 26 and 29 and the mother dies 27 and 31 are detachable, and if the nesting dies 26 and 29 having different cavities 25 and 28 are used, different bottles can be used in one mother dies 27 and 31. Can be molded.
[0023]
As shown in FIGS. 3A to 3D, the master mold 27 of the first half mold 21 is provided with a first medium conduit 32 through which a heating and cooling medium flows. The first medium conduit 32 includes an introduction pipe 33 for introducing a heated or cooled medium, a guide pipe 34 for guiding the inside of the mother die 27, and a discharge pipe 35 for discharging the medium. The guide tube 34 is provided inside the mother die 27 and in the vicinity of the peripheral surface and the bottom surface in contact with the nested die 26. By causing the heating medium or the refrigerant to flow through the first medium conduit 32, the mother die 27 can be heated or cooled to a predetermined temperature. Further, when the nested mold 26 is attached, the heat is transferred from the mother mold 27 to the nested mold 26, so that the nested mold 26 can be heated or cooled.
[0024]
As shown in FIG. 4, the plug part mold 24 placed on the half molds 21 and 22 is provided with a second medium conduit 36 through which a refrigerant flows. The second medium conduit 36 includes a plug portion introduction pipe 37 for introducing a cooled medium, that is, a refrigerant, a plug portion guide pipe 38 for guiding the refrigerant through the plug portion mold 24, and a refrigerant. It is comprised from the plug part discharge pipe 39 which discharges. The plug portion guide tube 38 is provided in the plug portion mold 24 and in the vicinity of the cavity 41 formed in the plug portion mold 24.
[0025]
As shown in FIG. 1, in the handle inner side forming portion 42 formed between the cavity 25 of the insert die 26 of the first half die 21 and the handle incorporating portion 23, a third coolant is circulated. A media line 43 is provided. As shown in FIGS. 1, 3, and 5, the third medium conduit 43 includes a handle introduction pipe 44 that introduces refrigerant, a handle inner formation guide pipe 45 that guides the handle inner formation section 42, and refrigerant. It consists of a handle discharge pipe 46 for discharging, a connection pipe 47 for connecting the handle introduction pipe 44 and the handle inner guide pipe 45, and a connection pipe 48 for connecting the handle inner guide pipe 45 and the handle discharge pipe 46. The connecting pipes 47 and 48 are provided on the mother die 27.
[0026]
  As shown in FIG. 1, the second medium pipe 36 and the third medium pipe 43 areThe switching device 51 is set so as to communicate with both the second medium pipe 36 and the third medium pipe 43 in series or from the medium introduction pipe 52.can do.
[0027]
This switching device 51 connects the medium introduction pipe 52 for introducing the refrigerant from the outside to the handle part introduction pipe 44 and connects the handle part discharge pipe 46 to the plug part introduction pipe 37. Further, the medium introduction pipe 52 and the plug part introduction pipe 37 are connected to form a connection part 53. A flow rate adjusting pin 54 is interposed in the connecting portion 53.
[0028]
Specific examples of the switching device 51 include the devices shown in FIGS. This is formed from a cylindrical main body portion 55 and a flange portion 57 having a screw hole 56 for fixing the switching device 51. The main body portion 55 is provided with the connecting portion 53 penetrating the main body portion 55 in parallel with the flange portion 57. Then, a connection part 44 ′ connected to the handle part introduction pipe 44 and a connection part 46 ′ connected to the handle part discharge pipe 46 are formed at right angles from the end surface of the main body part 55 toward the connection part 53. The Further, a connection portion 52 ′ connected to the medium introduction pipe 52 is formed from a portion where the connection portion 53 is connected to the connection portion 44 ′ in a direction perpendicular to the connection portion 53 and the connection portion 44 ′. Further, a connecting portion 37 ′ connected to the plug introduction pipe 37 is formed from a portion where the connecting portion 53 is connected to the connecting portion 46 ′ in a direction perpendicular to the connecting portion 53 and the connecting portion 46 ′. .
[0029]
Therefore, by using the main body 55 of the switching device 51 shown in FIG. 6, the medium introduction pipe 52 is connected to the handle introduction pipe 44 of the third medium conduit 43 via the connection part 52 ′ and the connection part 44 ′. The handle discharge pipe 46 of the third medium conduit 43 communicates in series with the plug introduction pipe 37 of the second medium conduit 36 through the connection 46 ′ and the connection 37 ′. Is done.
  Also,Both ends of the flow rate adjusting pin 54 inserted into the connecting portion 53 have the same diameter as the connecting portion 53, and the refrigerant does not leak from both ends of the connecting portion 53. Further, by changing the type of the flow rate adjusting pin 54, the connection portion 53 can be selectively made into a fully open communication, a partial communication, and a blocking mode. That is, as shown in FIG. 7, when the flow rate adjusting pin shown in (b) is used,In addition to the above series communication,The shafts other than both ends of the flow rate adjusting pin 54 are narrow, and the third medium pipe line 43 and the second medium pipe line 36 are fully opened.Ru. Furthermore, when the flow rate adjustment pin shown in (a) is used,In addition to the above series communication,The shafts other than both ends of the flow rate adjusting pin 54 are thick, and the third medium pipe line 43 and the second medium pipe line 36 are partially communicated.AndThe refrigerant flow is more in series. Furthermore, when the flow rate adjusting pin shown in (c) is used, the central portion of the shaft of the flow rate adjusting pin is the same as the diameter of the connecting portion 53, and the second medium conduit 36 and the third medium conduit 43 are different from each other. Is shut off in the switching device 51,The above series communicationcircuitonlyForm.
[0030]
  In addition, the second medium conduit 36 and the third medium conduit 43Are connected to both the second medium line 36 and the third medium line 43 from the medium introduction pipe 52 or the medium introduction pipe 52.The switching can be performed not only by replacing the flow rate adjusting pin 54 but also by replacing the switching device 51 itself. For example, if the one having the connecting portion shown in FIG.The medium introduction pipe 52 and the handle part introduction pipe 44 of the third medium pipe line 43 communicate with each other, and the handle part discharge pipe 46 of the third medium pipe line 43 and the plug part introduction pipe 37 of the second medium pipe line are connected. Can communicate. Moreover, if what has a connection part shown in FIG.2 (b) is used,The medium introduction pipe 52 and the handle part introduction pipe 44 of the third medium pipe line 43 communicate with each other, and the handle part discharge pipe 46 of the third medium pipe line and the plug part introduction pipe 37 of the second medium pipe line 36 are connected. The medium introduction pipe 52 and the stopper plug introduction pipe 37 of the second medium pipe line 36 can communicate with each other.it can. In addition, when cooling of the grip inner side formation part 42 becomes unnecessary, if the switching apparatus which has a connection part shown in FIG.2 (c) is used,The medium introduction pipe 52 and the plug part introduction pipe 37 of the second medium pipe line 36 can be communicated with each other.The refrigerant can be circulated only in the second medium conduit 36, and only the plug part mold 24 can be cooled.
[0031]
The first half mold 21 can be provided with a handle discharge device 61 that pushes out the handle 2 incorporated in the handle assembly portion 23. As shown in FIGS. 8A to 8C, the handle discharge device 61 is a device provided with a piston 63 provided with a rod 62 at the tip, and is connected to two chambers separated by the piston 63. By applying air pressure to one of the two air pressure introduction holes 64a and 64b, the rod 62 can freely enter and exit.
[0032]
The handle discharge device 61 is a portion adjacent to the handle assembly portion 23, and is provided on the side opposite to the side having the surface 65 where the first half mold 21 overlaps the second half mold 22. For this reason, pushing the rod 62 pushes the handle 2 at the tip of the rod 62. Further, the handle discharge device 61 is detachably attached to the insert mold 26. For this reason, the nesting die 26 can be removed from the mother die 27 and the handle discharging device 61. In addition, the handle discharging device 61 may be detachably attached to the mother die 27. By doing so, the handle discharging device 61 can be attached to and detached from the first half mold 21.
[0033]
Next, a stretch blow molding process using the half mold 21 will be described.
[0034]
As shown in FIG. 1, a predetermined nesting die 26 is incorporated in a mother die 27, and a plug die 24 is set on the head. Then, the handle 2 is incorporated into the handle incorporating portion 23 of the first half-divided die 21. At this time, the rod 62 of the handle discharge device 61 is stored.
[0035]
Next, the bottomed parison (not shown) heated between the divided first and second half molds 21 and 22 is arranged so that the central axes of the cavities 25 and 28 coincide with the central axis of the bottomed parison. Insert the second half mold 22 over the first half mold 21. Then, an extending rod (not shown) is inserted into the bottomed parison.
[0036]
In this state, by moving the stretching rod along the central axis of the cavity 25, air is injected from the opening of the bottomed parison while stretching the bottomed parison in the axial direction, and stretched in the circumferential direction. Then, a bottomed parison is placed along the cavities 25 and 28 to form a molded body. At this time, the protrusion 4 of the handle 2 is wound, the handle 2 and the bottle are inseparably connected, and a bottle with a handle is manufactured.
[0037]
At the time of this stretch blow molding, the heating medium is circulated through the first medium conduit 32 for heating and cooling the mother die 27, and the mother die 27 is held at a predetermined temperature, for example, 50 to 75 ° C. Since the heat of the mother die is transferred to the nested die 26, the body portion and the bottom portion of the bottomed parison subjected to the stretch blow molding are maintained at the above temperature. For this reason, these resins can be oriented and crystallized to improve heat resistance. If it is less than 50 ° C., it is difficult to crystallize sufficiently, so that sufficient heat resistance may not be obtained. Moreover, when it exceeds 75 degreeC, the transparency of said trunk | drum and bottom part may fall.
[0038]
  On the other hand, a refrigerant is circulated through the second medium pipe line 36 and the third medium pipe line 43 to cool the plug part and the handle inner part of the bottomed parison formed by stretch blow molding. At this time, when the handle inner side forming part 42 is sufficiently cooled, the switching device 51 is preferably set so that the second medium pipe line 36 and the third medium pipe line 43 are connected in series. On the other hand, by allowing the refrigerant to flow only through the second medium conduit 36, the cap portion mold can be more sufficiently cooled. And if you need intermediate conditions,From the medium introduction pipe 52,A second medium line 36 and a third medium line 43;Communicate with bothIt is preferable to set the switching device 51 so that it does. At this time, when the switching device 51 using the flow rate adjustment pin 54 shown in FIG. 1 is used, the flow rate to the third medium conduit 43 is adjusted by changing the thickness of the shaft of the flow rate adjustment pin. be able to.
[0039]
If the temperature of the grip inner side forming part 42 is too high, the bottle wall adheres and the wall thickness increases locally. On the other hand, if the temperature is too low, the bottle wall solidifies before it can be extended, and the wall thickness increases. There is a tendency. Therefore, by adjusting the flow rate to the third medium conduit 43 by the above method, it is possible to adjust the temperature appropriately according to the shape of the bottle.
[0040]
After the cooling is completed, the second half mold 22 is opened, and the rod 63 of the handle discharge device 61 is pushed out to push the handle 2 out of the handle assembly portion 23. At the same time, by removing the molded bottle from the cavities 25 and 41, a bottle with a handle is obtained.
[0041]
As a material of the bottle with a handle, which is a molded body obtained using the mold for forming a bottle with a handle according to the present invention, a resin that can be stretch blow molded, that is, a thermoplastic resin is preferable. Among these, a thermoplastic polyester resin is preferable from the viewpoints of moldability, strength of the obtained molded body, and the like. Examples of the thermoplastic polyester resin include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, a copolymer thereof or a mixture thereof.
[0042]
【Example】
(Example 1)
  The first half mold 21 shown in FIGS. 1 and 8, the second half mold 22 shown in FIG. 8C, and the first to third medium conduits.32, 36, 43, and the switching device 51 was stretch blow-molded by the method shown above using the serial type shown in FIG. At the time of this molding, the spring type thermometer 66 shown in FIG. 8B is mounted in the mother dies 27 and 31 of the first half mold 21 and the second half mold 22 to form a bottle with a handle shown in FIG. The temperatures of the nested molds 26 and 29 corresponding to the positions indicated by the circled numbers shown were measured. After molding, the bottle was cooled by the above method, and the bottle with the handle was taken out.
  In addition, the position of the bottle with a handle indicated by the circled numbers is as follows.(In the following, “○ 1”, which is a combination of ○ and a number, is synonymous with a number with a ○ (a number written in ○).)
○ 1: Upper end of bottle body
○ 2: The upper center of the bottle body, the part opposite the side with the handle
○ 3: The lower part of the center of the bottle body, the part opposite the side with the handle
○ 4: Grip inner side forming part
○ 5: The upper center of the bottle body, opposite to the side with the handle (○ 2Middle part)
○ 6: Lower center of bottle body, opposite side with handle (○ 3) Intermediate temperature measurement with
The results are shown in Table 1.
[0043]
(Example 2)
  As the switching device 51, a type using the flow rate adjusting pin 54 of FIG. 1 is used.WasExcept for this, the procedure was the same as in Example 1. Table 1 shows the temperature measurement results at that time.
[0044]
(Comparative Example 1)
The same procedure as in Example 1 was performed except that the half mold 30 shown in FIG. 10 and the medium pipes 7, 8, and 9 were used as the mold. Table 1 shows the temperature measurement results at that time.
[0045]
[Table 1]

[0046]
  result
As is clear from Table 1, the handle inner side forming part○ 4The temperature of 21 to 23 ° C. when the series type of Example 1 was used, Example 2PlaceThe temperature can be adjusted to 28 to 34 ° C., which is lower than that of 37 to 44 ° C. of Comparative Example 1, and the molding conditions can be set according to the shape of the bottle with the handle.
[0047]
【The invention's effect】
According to the present invention, since the mold is divided into the mother mold and the nested mold, it is sufficient that only the nested mold is prepared according to the shape of the target bottle. The production of the mold can be streamlined. Furthermore, since the weight is reduced only with the nested type, the mold exchanging work becomes easier.
[0048]
  In addition, since the first medium conduit is provided in the mother die, it is not necessary to provide the medium conduit in the nested die, and the production of the nested die is facilitated. further, CutBy changing deviceThe second medium pipe and the third medium pipe are connected in series, or the medium introduction pipe is connected to the second medium pipe and the third medium pipe.Since it was made possible, the flow rate of the plug part mold and the grip inner side forming part can be adjusted.
[0049]
Furthermore, since the flow rate adjustment pin is interposed in the connection part between the medium introduction pipe and the plug part introduction pipe of the switching device, by adjusting the diameter of the connection part and the shaft thickness of the flow rate adjustment pin, etc. It is possible to adjust the amount of the refrigerant flowing through the plug part mold and the handle inner side forming part.
[0050]
Further, when the bottle obtained after stretch blow molding and cooling is taken out, the handle can be easily taken out by the handle discharging device. Further, since the handle discharging device is detachably provided with the first half-type nesting die, the nesting die can be easily exchanged.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a first half type
FIGS. 2A, 2B, and 2C are front views showing other examples of the switching device.
FIG. 3A is a front view showing an example of a mother die.
(B) Left side view of (a)
(C) Right side view of (a)
(D) Plan view of (a)
FIG. 4A is a front view showing an example of a plug part mold.
(B) Plan view of (a)
FIG. 5A is a front view showing an example of a nested type.
(B) Right side view of (a)
(C) AA sectional view of (a)
FIG. 6A is a front view showing an example of a switching device.
(B) BB sectional view of (a)
(C) CC sectional view of (b)
FIGS. 7A, 7B, and 7C are front views showing other examples of flow rate adjusting pins. FIGS.
FIG. 8A is a front view showing an example of a first half side in which a handle discharging device is incorporated.
(B) DD sectional view of (a)
(C) EE sectional view of (a)
FIG. 9 is a front view showing an example of a bottle with a handle.
FIG. 10 is a front view showing an example of a conventional half type
[Explanation of symbols]
1 bottle
2 Handle
3 edge
4 Protrusion
5 Mouth mold
6 Handle assembly part
7 Media pipeline
8 Medium pipeline
9 Media pipeline
11 Handle inner forming part
21 The first half type
22 The second half type
23 Handle assembly part
24 Mouth mold
25 cavity
26 Nested type
27 Mother mold
28 cavities
29 Nested type
30 Half type
31 Mother mold
32 First medium conduit
33 Introduction pipe
34 Guide tube
35 discharge pipe
36 Second medium conduit
37 Mouth plug introduction tube
37 'connection
38 Mouth guide tube
39 Mouth plug discharge pipe
40 cavities
41, 41 'cavity
42 Handle inner forming part
43 Third media conduit
44 Handle introduction pipe
44 'connection
45 Handle inner guide tube
46 Handle discharge pipe
46 'connection
47 Connecting pipe
48 Connecting pipe
51 Switching device
52 Medium introduction pipe
52 'connection
53 Connecting part
54 Flow adjustment pin
55 Body
56 Screw holes
57 Buttocks
61 Handle ejector
62 Rod
63 piston
64a, 65b Air introduction term
65 Overlapping surface
66 Spring thermometer

Claims (4)

It is composed of a body mold having a cavity for forming the main body of the bottle and a mold for a cap part having a cavity for forming the bottle plug part, and the body mold has a handle assembly part. The first and second half-divided molds, and a handle is incorporated in the first half-divided handle incorporating portion, and a bottomed parison is inserted between the first and second half-divided molds. In the mold for forming a bottle with a handle used for producing a bottle with a handle by performing stretch blow molding by superimposing the first and second half molds,
The first and second half molds are each composed of a nested mold having a cavity for molding the main body part, and a mother mold covering the outer peripheral part and the bottom part of the nested mold,
A first medium conduit is provided in the mother die, a second medium conduit is provided in the plug part mold, and a grip inner forming portion formed between the nested die cavity and the handle incorporating portion is 3 media lines are provided,
The start end of the second medium conduit, the start end of the third medium conduit, and the end of the third medium conduit are connected to the switching device, and a medium introduction pipe for introducing a medium from the outside is connected to the switching device. connection,
The communication state of the medium introduction pipe, the start end part of the third medium pipe line, the end part of the third medium pipe line, and the start end part of the second medium pipe line through the switching device is represented by the following (1). A mold for forming a bottle with a handle, characterized in that it is any one of (3) .
(1) The medium introduction pipe communicates with the start end portion of the third medium conduit, and the terminal end portion of the third medium conduit and the start end portion of the second medium conduit communicate with each other.
(2) The medium introduction pipe communicates with the starting end of the second medium pipe line.
(3) The medium introduction pipe communicates with the start end portion of the third medium conduit, and the terminal end portion of the third medium duct and the start end portion of the second medium duct communicate with each other. The two media pipes communicate with the starting end. The second medium conduit is composed of a plug introduction pipe for introducing the medium, a plug guide pipe for guiding the medium into the mold for the plug, and a plug discharge pipe for discharging the medium. Further, the third medium conduit is composed of a handle part introduction pipe for introducing the medium, a handle inner part forming part guide pipe for guiding to the handle inner part forming part, and a handle part discharge pipe for discharging the medium,
The switching device connects a medium introduction tube for introducing a medium from the outside to the handle portion introduction tube, connects the handle portion discharge tube to a plug portion introduction tube, and introduces the medium introduction tube and the plug portion. The flow rate is adjusted by connecting a flow rate adjusting pin to the connecting part between the medium introducing pipe and the plug part introducing pipe and adjusting the diameter of the connecting part or the thickness of the flow rate adjusting pin. The bottle molding die with a handle according to claim 1, wherein the mold is a device capable of performing the same.   The method of adjusting the diameter of the connecting portion or the thickness of the flow rate adjusting pin is a method of changing the thickness of the shaft other than both ends of the flow rate adjusting pin, or the connecting portion at the center portion of the shaft of the flow rate adjusting pin. The mold for forming a bottle with a handle according to claim 1 or 2, wherein a portion having a diameter of the same diameter as that of the handle is provided. A handle discharging device on a side adjacent to the first half-divided handle incorporating portion, on the side opposite to the side where the first half-divided surface overlaps with the second half-divided die, handle bottle mold according to any one of claims 1 to 3, characterized in that provided detachably with the nested.

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