WO2022056960A1 - 吹塑模具、吹瓶机及塑料瓶 - Google Patents

吹塑模具、吹瓶机及塑料瓶 Download PDF

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Publication number
WO2022056960A1
WO2022056960A1 PCT/CN2020/118769 CN2020118769W WO2022056960A1 WO 2022056960 A1 WO2022056960 A1 WO 2022056960A1 CN 2020118769 W CN2020118769 W CN 2020118769W WO 2022056960 A1 WO2022056960 A1 WO 2022056960A1
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WO
WIPO (PCT)
Prior art keywords
bottle
handle
blow
shoulder
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/118769
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English (en)
French (fr)
Inventor
邹大群
黄孝林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Tech Long Packaging Machinery Co Ltd
Original Assignee
Guangzhou Tech Long Packaging Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202022045751.9U external-priority patent/CN212603332U/zh
Priority claimed from CN202010979443.5A external-priority patent/CN112060548B/zh
Application filed by Guangzhou Tech Long Packaging Machinery Co Ltd filed Critical Guangzhou Tech Long Packaging Machinery Co Ltd
Priority to JP2023504058A priority Critical patent/JP2023540167A/ja
Priority to EP20953818.0A priority patent/EP4169695A4/en
Priority to US18/020,551 priority patent/US12415306B2/en
Publication of WO2022056960A1 publication Critical patent/WO2022056960A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/482—Moulds with means for moulding parts of the parisons in an auxiliary cavity, e.g. moulding a handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/10—Handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C2049/4879—Moulds characterised by mould configurations
    • B29C2049/4882—Mould cavity geometry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C2049/4879—Moulds characterised by mould configurations
    • B29C2049/4892—Mould halves consisting of an independent main and bottom part
    • 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
    • B29C2949/079—Auxiliary parts or inserts
    • B29C2949/0791—Handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0094—Geometrical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0036—Hollow circonferential ribs

Definitions

  • the present application relates to the technical field of blowing, for example, to a blowing mold, a blowing machine and a plastic bottle.
  • the plastic milk bottles and beverage bottles with their own handles on the market are mainly divided into two categories, one is the HDPE bottle with its own handle, and the other is the PET bottle with a rear handle.
  • the bottle made of HDPE material with its own handle has defects such as incomplete sealing, easy damage to the bottle body and uncontrollable bottle capacity; while the bottle made of PET material has better sealing performance than the bottle made of HDPE material, and the bottle body is strong and resistant to resistance. It has the advantages of high oxygen performance, transparency and easy observation, etc.
  • PET bottles need to be made with rear handles, and the handles in PET bottles with rear handles require specific equipment for production and installation, and are easy to fall off after installation. The above reasons have prompted relevant companies in the industry to hope to replace the PET bottles with rear handles currently on the market with PET bottles with their own handles.
  • the PET bottle with its own handle is made by a two-step blowing process, that is, the preform is first injection molded, and then the preform is blown into a bottle in a blow mold. Since the preform with its own handle has more handles than the conventional preform, problems that have not occurred in the conventional preform blowing process will occur during the preform blowing process. After the preform is blown, the junction between the bottle shoulder and the bottle neck opposite to the handle is prone to folds, resulting in unqualified bottle quality.
  • the present application provides a blow molding mold and a bottle blowing machine, which can form a raised step structure at the bottle shoulder and prevent wrinkles from being formed at the connection between the bottle shoulder and the bottle neck.
  • the present application provides a plastic bottle, which is blown from a bottle preform with its own handle, which has high production efficiency and low cost, and can avoid the situation that the handle falls off.
  • An embodiment provides a blow molding mold, which has a mold cavity. After the preform is blown, a bottle body, a bottle shoulder, a handle, and a bottle neck are formed in the mold cavity, and the bottle shoulder is located on the bottle body and the bottle neck. one end of the handle is connected with the bottle shoulder, the other end of the handle is also connected with the bottle shoulder or with the bottle neck, the mold cavity includes a first recessed area, the first recessed A raised step structure is formed on the bottle neck.
  • the cavity wall of the mold cavity is provided with at least one first rib, and the first rib forms a first groove on the bottle shoulder.
  • the first convex rib is arranged perpendicular to the height direction of the bottle shoulder.
  • At least one second convex rib is further provided on the cavity wall of the mold cavity, and the second convex rib forms a non-closed or annularly closed second concave on the bottle body groove.
  • the second rib is arranged on a plane or the second rib is arranged on the cavity wall in a wave shape.
  • the number of the second protruding ribs is not less than two, and each of the second protruding ribs is arranged at intervals or partially connected to each other.
  • the mold cavity includes a second concave area, and the second concave area is used for accommodating the handle.
  • An embodiment provides a bottle blowing machine, which includes the blow mold described in any of the above solutions.
  • An embodiment provides a plastic bottle, which is made by the above-mentioned bottle blowing machine.
  • the material of the plastic bottle is PET.
  • the mold cavity of the blow mold of the present application includes a first concave area, and the first concave area forms a raised step structure on the bottle neck, so that more blanks are occupied there, and wrinkles are prevented from appearing at the connection between the bottle shoulder and the bottle neck , to improve the blowing quality of the preform.
  • the plastic bottle produced by the blow mold of the present application is blown from the bottle embryo with its own handle. Since there is no handle that needs to be assembled separately, the production process is simplified, the production efficiency is improved, the production cost is reduced, and the occurrence of the handle is avoided. falling off condition.
  • Fig. 1 is the schematic diagram before using conventional mold to blow the preform with handle
  • Fig. 2 is the schematic diagram after the conventional mold is used to blow the preform with its own handle
  • Fig. 3 is the enlarged view of A place in Fig. 2;
  • FIG. 4 is a schematic view of the cavity structure of the blow mold according to the embodiment of the application.
  • Fig. 5 is the enlarged view of B place in Fig. 4;
  • Fig. 6 is the enlarged view of C place in Fig. 4;
  • FIG. 7 is a three-dimensional schematic diagram of a plastic bottle according to an embodiment of the application.
  • FIG. 8 is a schematic diagram of a cavity structure of a blow mold according to another embodiment of the application.
  • FIG. 9 is a perspective view of a plastic bottle blown by using the blow mold shown in FIG. 8;
  • FIG. 10 is a schematic diagram of a cavity structure of a blow mold according to another embodiment of the application.
  • Fig. 11 is a perspective view of a plastic bottle blown by using the blow mold shown in Fig. 10;
  • FIG. 12 is a schematic diagram of a cavity structure of a blow mold according to still another embodiment of the application.
  • Fig. 13 is a perspective view of a plastic bottle blown by using the blow mold shown in Fig. 12;
  • FIG. 14 is a schematic perspective view of a blow mold according to an embodiment of the application.
  • 1' conventional mould; 1, blow mould; 10, cavity; 11, left half mould; 12, right half mould; 13, bottom mould; 101, first recessed area; 102, first rib; 103, The second rib; 104, the second recessed area; 105, the third rib; 100, the preform; 100', the plastic bottle; 110, the neck of the bottle; 120, the shoulder; 1201, the fold; 130, the handle; 140, the bottle body; 200, stretching rod; 1100, step structure; 1200, first groove; 1300, second groove; 1400, third groove.
  • a first feature "on” or “under” a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them.
  • a first feature being "above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature.
  • the first feature being “below” the second feature includes that the first feature is directly below and diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
  • the two-step bottle blowing process needs to first manufacture the preform 100, and then blow the preform 100 with a specific mold.
  • the preform 100 is blown, due to the extra handle 130, the preform 100 expands and fills the lower part of the mold cavity 10 during the stretching process of the preform 100.
  • the handle 130 of the 100 has not yet been attached to the cavity wall of the mold cavity 10.
  • the blank at the bottle body 140 will push the handle 130 to the cavity wall of the mold cavity 10 under the action of the compressed air, and then push the handle 130 to the cavity wall of the mold cavity 10. Finally, under the action of compressed air, it is attached to the cavity wall of the mold cavity 10 together with the handle 130.
  • the connection between the bottle shoulder 120 and the bottle neck 110 is prone to wrinkles 1201 (as shown in FIG. 3), resulting in Quality defects.
  • the blow mold 1 of this embodiment has a mold cavity 10. After the preform 100 is blown, a neck 110, a bottle shoulder 120, a handle 130 and a bottle body 140 are formed in the mold cavity 10.
  • the shoulder 120 is located between the bottle neck 110 and the bottle body 140, one end of the handle 130 is connected with the bottle shoulder 120, the other end of the handle 130 is connected with the bottle neck 110, both ends of the handle 130 can also be connected with the bottle shoulder 120,
  • a first concave area 101 is provided on the cavity wall, and the first concave area 101 forms a raised step structure 1100 on the bottle neck 110 .
  • the blow mold 1 of this embodiment is provided with a first concave area 101 on the cavity wall of the mold cavity 10.
  • the first concave area 101 forms a raised step structure 1100 on the bottle neck 110, so that more embryos are occupied there. It can prevent wrinkles 1201 from appearing at the connection between the bottle shoulder 120 and the bottle neck 110, and improve the blowing quality of the bottle preform 100.
  • At least one first rib 102 is provided on the cavity wall of the mold cavity 10 , and the first rib 102 forms a first groove 1200 on the bottle shoulder 120 .
  • the first rib 102 can limit the movement of the blanks at the bottle shoulder 120 to the bottle neck 110 , thereby reducing the probability of the wrinkle 1201 , and the first groove 1200 can also increase the structural strength of the bottle shoulder 120 . Due to the existence of the handle 130, the first protruding rib 102 cannot form a closed ring shape, and thus the first groove 1200 is also not a closed shape.
  • the first convex rib 102 is arranged perpendicular to the height direction of the bottle shoulder 120 , so that the first convex rib 102 can better prevent the blanks at the bottle shoulder 120 from moving to the bottle neck 110 .
  • At least one second protruding rib 103 is further provided on the cavity wall of the mold cavity 10 , and the second protruding rib 103 forms a non-closed or annularly closed second groove 1300 on the bottle body 140 .
  • the setting position of the second rib 103 can be selected to be close to the bottle shoulder 120, so that the second rib 103 can restrict the movement of the billet in the bottle body 140 to the bottle shoulder 120 and the handle 130, prevent the bottle shoulder 120 from wrinkling and avoid the billet
  • the movement of the handle 130 causes a positional displacement of the handle 130 .
  • the second grooves 1300 also play a role in enhancing the structural strength of the bottle body 140 , and a plurality of second grooves 1300 can be obtained by arranging multiple second ribs 103 , thereby greatly improving the structural strength of the bottle body 140 , so that the It is not easily deformed.
  • the second rib 103 is arranged on a plane or the second rib 103 is arranged on the cavity wall of the mold cavity 10 in a wave shape, and the specific shape of the second rib 103 can be flexibly selected according to actual needs.
  • the second rib 103 is in the form of a closed loop or a non-closed arc, and the second rib 103 is arranged on a plane, so that the same height.
  • the second ribs 103 are wavy, so that the second grooves 1300 are also wavy, and each second groove 1300 is not at the same height.
  • the second protruding ribs 103 may be arranged to be spaced apart from each other, or may be partially connected together. As shown in FIG. 12 and FIG. 13 , each of the second ribs 103 is partially connected, so that a part of each of the second grooves 1300 also overlaps.
  • the mold cavity 10 includes a second concave area 104 , and the second concave area 104 is used for accommodating the handle 130 .
  • the shape of the second recessed area 104 matches the shape of the handle 130 so that the handle 130 can stop in the correct position during the blowing process of the preform 100 .
  • the cavity wall of the mold cavity 10 is provided with a third convex rib 105 , and the third convex rib 105 forms a third concave at the connection between the bottle shoulder 120 and the bottle body 140 .
  • Slot 1400 The function of the third protruding rib 105 is similar to that of the second protruding rib 103 , and can also restrict the movement of the blanks in the bottle body 140 to the bottle shoulder 120 , thereby preventing the bottle shoulder 120 from wrinkling.
  • the blow mold 1 includes a left half mold 11 , a right half mold 12 and a bottom mold 13 , and the left half mold 11 , the right half mold 12 and the bottom mold 13 are assembled to form a mold cavity 10 .
  • the blowing steps of the preform 100 are as follows: first, separate the left half mold 11 and the right half mold 12, and then put the heated preform 100 into the left half mold 11 and the right half mold 12. Then, the left half mold 11, the right half mold 12 and the bottom mold 13 are closed, and the stretching rod 200 is inserted into the preform 100 from the embryo mouth to stretch the bottle preform 100 longitudinally, and the compressed air is also blown into the bottle from the embryo mouth.
  • the preform 100 is laterally stretched in the embryo 100, and after the preform 100 is blown, the blow mold 1 is opened.
  • the embodiment of the present application further provides a bottle blowing machine, which includes the blow mold 1 of any of the above embodiments, so that the bottle blowing machine can blow the preform 100 with its own handle 130 with high quality.
  • the embodiment of the present application further provides a plastic bottle 100 ′, which is made by the above-mentioned blow molding machine.
  • the plastic bottle 100 ′ has its own handle 130 instead of using After the blowing is completed, the independent handle is installed separately, which simplifies the production process and reduces the production cost, and there is no need to worry about the problem of the independent handle falling off.
  • the plastic bottle 100' is made of PET, so that the plastic bottle 100' has the advantages of good sealing, strong bottle body, high oxygen barrier performance, and transparency and easy observation.
  • description with reference to the terms "preferred” etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one implementation of the present application example or example.
  • schematic representations of the above terms do not necessarily refer to the same embodiment or example.
  • the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

一种吹塑模具、吹瓶机及塑料瓶，吹塑模具具有模腔，瓶胚吹制完成后在模腔内形成瓶身、瓶肩、把手和瓶颈，瓶肩位于瓶身和瓶颈之间，把手的一端与瓶肩连接，把手的另一端也与瓶肩连接或与瓶颈连接，模腔包括第一凹陷区，第一凹陷区使瓶颈上形成凸起的台阶结构。本申请的吹塑模具的模腔包括第一凹陷区，第一凹陷区使瓶颈上形成凸起的台阶结构，从而使该处占用更多的胚料，防止瓶肩与瓶颈的连接处出现褶皱，提升瓶胚的吹制质量。采用本申请的吹塑模具制作的塑料瓶由自带把手的瓶胚吹制而成，由于没有需单独组装的把手，简化了生产工艺，提高了生产效率、降低了生产成本，避免了发生把手脱落的情况。

Description

吹塑模具、吹瓶机及塑料瓶
本申请要求申请日为2020年9月17日、申请号为202010979443.5，以及申请日为2020年9月17日、申请号为202022045751.9的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及吹瓶技术领域，例如涉及一种吹塑模具、吹瓶机及塑料瓶。
背景技术
目前市场上自带把手的塑料奶瓶和饮料瓶主要分为两类，一类是自带把手HDPE材质的瓶子，另一类是后置把手PET材质的瓶子。其中自带把手HDPE材质的瓶子存在密封不完全、瓶身容易破损和瓶子容量无法控制等缺陷；而另一种PET材质的瓶子虽然相比HDPE材质的瓶子存在密封性好、瓶身结实、阻氧性能高而且透明易观测等优点，但是目前PET材质的瓶子都是需要做后置把手的，而后置把手PET材质的瓶子中的把手需要特定的设备生产和安装，且安装后容易脱落。以上原因促使行业内的相关企业希望能够用自带把手PET材质瓶子代替目前市场上的后置把手PET材质的瓶子。
为了保证把手的位置不变和形状完好，瓶胚把手部位的胚料只能横向拉伸，不能被纵向拉伸。因此必需对瓶胚加温过程中把手部位进行技术处理，防止在吹瓶过程中因把手部位温度过高后变软而产生变形，进而造成吹瓶失败。自带把手PET瓶子是采用二步法吹瓶工艺方法制成的，即先注塑成瓶胚，然后在吹塑模具中将瓶胚吹制成瓶子。由于自带把手的瓶胚相较于常规的瓶胚多出了把手这个部件，在瓶胚吹制的过程中会产生常规瓶胚吹制过程中不曾出现的问题。瓶胚吹制完成后，把手对面的瓶肩与瓶颈的连接处易形成褶皱，造成瓶子的质量不合格。
发明内容
本申请提供了一种吹塑模具及吹瓶机，可使瓶肩部位形成凸起的台阶结构，防止瓶肩与瓶颈的连接处形成褶皱。
本申请提供了一种塑料瓶，其由自带把手的瓶胚吹制而成，生产效率高、 成本低，可避免发生把手脱落的情况。
一实施例提供一种吹塑模具，具有模腔，瓶胚吹制完成后在所述模腔内形成瓶身、瓶肩、把手和瓶颈，所述瓶肩位于所述瓶身和所述瓶颈之间，所述把手的一端与所述瓶肩连接，所述把手的另一端也与所述瓶肩连接或与所述瓶颈连接，所述模腔包括第一凹陷区，所述第一凹陷区使所述瓶颈上形成凸起的台阶结构。
作为本申请的一种可选方案，所述模腔的腔壁上设有至少一道第一凸筋，所述第一凸筋使所述瓶肩上形成第一凹槽。
作为本申请的一种可选方案，所述第一凸筋与所述瓶肩的高度方向垂直设置。
作为本申请的一种可选方案，所述模腔的腔壁上还设有至少一道第二凸筋，所述第二凸筋使所述瓶身上形成非闭合或环状闭合的第二凹槽。
作为本申请的一种可选方案，所述第二凸筋设置在一个平面上或所述第二凸筋呈波浪形设置在所述腔壁上。
作为本申请的一种可选方案，所述第二凸筋的数量不少于两个，各个所述第二凸筋相互间隔设置或部分连接。
作为本申请的一种可选方案，所述模腔包括第二凹陷区，所述第二凹陷区用于容纳所述把手。
一实施例提供一种吹瓶机，包含有上述任一方案所述的吹塑模具。
一实施例提供一种塑料瓶，由上述吹瓶机制作。
作为本申请的一种可选方案，所述塑料瓶的材质为PET。
本申请的吹塑模具的模腔包括第一凹陷区，第一凹陷区使瓶颈上形成凸起的台阶结构，从而使该处占用更多的胚料，防止瓶肩与瓶颈的连接处出现褶皱，提升瓶胚的吹制质量。采用本申请的吹塑模具制作的塑料瓶由自带把手的瓶胚吹制而成，由于没有需要单独组装的把手，简化了生产工艺，提高了生产效率、降低了生产成本，避免了发生把手脱落的情况。
附图说明
图1为采用常规模具对自带把手瓶胚进行吹制前的示意图；
图2为采用常规模具对自带把手瓶胚吹制完成后的示意图；
图3为图2中A处的放大图；
图4为本申请实施例的吹塑模具的模腔结构示意图；
图5为图4中B处的放大图；
图6为图4中C处的放大图；
图7为本申请实施例的塑料瓶的立体示意图；
图8为本申请另一实施例的吹塑模具的模腔结构示意图；
图9为采用图8所示的吹塑模具进行吹制的塑料瓶的立体示意图；
图10为本申请又一实施例的吹塑模具的模腔结构示意图；
图11为采用图10所示的吹塑模具进行吹制的塑料瓶的立体示意图；
图12为本申请再一实施例的吹塑模具的模腔结构示意图；
图13为采用图12所示的吹塑模具进行吹制的塑料瓶的立体示意图；
图14为本申请实施例的吹塑模具的立体示意图。
图中：
1’、常规模具；1、吹塑模具；10、模腔；11、左半模；12、右半模；13、底模；101、第一凹陷区；102、第一凸筋；103、第二凸筋；104、第二凹陷区；105、第三凸筋；100、瓶胚；100’、塑料瓶；110、瓶颈；120、瓶肩；1201、褶皱；130、把手；140、瓶身；200、拉伸杆；1100、台阶结构；1200、第一凹槽；1300、第二凹槽；1400、第三凹槽。
具体实施方式
下面结合附图并通过具体实施方式来进一步说明本申请的技术方案。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征之“上”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征之“下”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者多个该特征。
二步法吹瓶工艺需要先制造出瓶胚100，然后用特定的模具对瓶胚100进行吹制，如图1至图3所示，当使用常规模具1’对自带有把手130的瓶胚100进 行吹制时，由于多出了把手130这个部件，瓶胚100在拉伸涨大的过程中，瓶身140部位的胚料先涨大并充满模腔10的下部，此时瓶胚100的把手130部位还未贴上模腔10的腔壁，随着吹制的进行，瓶身140部位的胚料会在压缩空气的作用下将把手130推向模腔10的腔壁，并最后在压缩空气的作用下与把手130一起贴到模腔10的腔壁上，吹制完成后，瓶肩120与瓶颈110的连接处易出现褶皱1201(如图3所示)，因而产生了质量缺陷。
如图4至图7所示，本实施例的吹塑模具1具有模腔10，瓶胚100吹制完成后在模腔10内形成瓶颈110、瓶肩120、把手130和瓶身140，瓶肩120位于瓶颈110和瓶身140之间，把手130的一端与瓶肩120连接，把手130的另一端与瓶颈110连接，把手130的两端也可以均与瓶肩120连接，模腔10的腔壁上设有第一凹陷区101，第一凹陷区101使瓶颈110上形成凸起的台阶结构1100。
本实施例的吹塑模具1在模腔10的腔壁上设有第一凹陷区101，第一凹陷区101使瓶颈110上形成凸起的台阶结构1100，从而使该处占用更多的胚料，防止瓶肩120与瓶颈110的连接处出现褶皱1201，提升瓶胚100的吹制质量。
可选的，模腔10的腔壁上设有至少一道第一凸筋102，第一凸筋102使瓶肩120上形成第一凹槽1200。第一凸筋102可以限制瓶肩120部位的胚料向瓶颈110移动，从而降低褶皱1201出现的概率，第一凹槽1200还可以起到增加瓶肩120结构强度的作用。由于把手130的存在，第一凸筋102不能形成一个闭合的环形，因而第一凹槽1200也不是一个闭合的形态。
示例性的，第一凸筋102与瓶肩120的高度方向垂直设置，使第一凸筋102可以更好地阻挡瓶肩120部位的胚料向瓶颈110移动。
可选的，模腔10的腔壁上还设有至少一道第二凸筋103，第二凸筋103使瓶身140上形成非闭合或环状闭合的第二凹槽1300。第二凸筋103的设置位置可选为靠近瓶肩120，使第二凸筋103可以限制瓶身140部位的胚料向瓶肩120及把手130移动，防止瓶肩120起皱并避免胚料的移动造成把手130发生位置偏移。此外，第二凹槽1300还起到增强瓶身140结构强度的作用，通过设置多道第二凸筋103可获得多个第二凹槽1300，从而较大地提升瓶身140的结构强度，使其不易变形。
示例性的，第二凸筋103设置在一个平面上或第二凸筋103呈波浪形设置在模腔10的腔壁上，第二凸筋103的具体形态可以根据实际需要灵活选择。如 图8和图9所示，第二凸筋103呈闭合的环状或非闭合的弧线型，且第二凸筋103设置在一个平面上，使得每个第二凹槽1300各处的高度相同。而如图10和图11所示，第二凸筋103则呈现出波浪形，使得第二凹槽1300也呈现为波浪形，每个第二凹槽1300各处并不处于同一高度上。
当第二凸筋103的数量大于两个时，第二凸筋103之间可以设置为相互间隔的形式，也可以部分连接在一起。如图12和图13所示，各个第二凸筋103部分连接，因而使得各个第二凹槽1300也有一部分发生重合。
如图4所示，可选的，模腔10包括第二凹陷区104，第二凹陷区104用于容纳把手130。第二凹陷区104的形状与把手130的形状相匹配，使把手130在瓶胚100的吹制过程中能停止在正确的位置上。
如图4和图7所示，在一些实施例中，模腔10的腔壁上设有第三凸筋105，第三凸筋105使瓶肩120与瓶身140的连接处形成第三凹槽1400。第三凸筋105所起的作用类似于第二凸筋103，也是可以限制瓶身140部位的胚料向瓶肩120移动，从而防止瓶肩120起皱。
可选的，如图14所示，吹塑模具1包括左半模11、右半模12和底模13，左半模11、右半模12和底模13装配后形成模腔10。结合图1和图2，瓶胚100的吹制步骤为：首先，使左半模11和右半模12分离，然后将加热后的瓶胚100放入左半模11和右半模12之间，再使左半模11、右半模12和底模13合拢，拉伸杆200从胚口插入瓶胚100中对瓶胚100进行纵向拉伸，同时压缩空气也由胚口吹入瓶胚100内对瓶胚100进行横向拉伸，瓶胚100吹制完毕后，吹塑模具1打开。
本申请的实施例还提供一种吹瓶机，包含有上述任一实施例的吹塑模具1，因而使得此种吹瓶机能够对自带把手130的瓶胚100进行高质量的吹制。
如图7、图9、图11和图13所示，本申请的实施例还提供一种塑料瓶100’，由上述吹瓶机制作，该种塑料瓶100’自带把手130，而非采用吹制完成后再另外安装独立把手的形式，简化了生产工艺，降低了生产成本，不用担心独立把手脱落的问题。
可选的，塑料瓶100’的材质为PET，因而使得塑料瓶100’具有密封性好、瓶体结实、阻氧性能高而且透明易观测等优点。
作为本申请优选的实施方案，在本说明书的描述中，参考术语“优选的”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于 本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。

Claims (10)

  1. 一种吹塑模具，具有模腔，瓶胚吹制完成后在所述模腔内形成瓶身、瓶肩、把手和瓶颈，所述瓶肩位于所述瓶身和所述瓶颈之间，所述把手的一端与所述瓶肩连接，所述把手的另一端也与所述瓶肩连接或与所述瓶颈连接，所述模腔包括第一凹陷区，所述第一凹陷区使所述瓶颈上形成凸起的台阶结构。
  2. 根据权利要求1所述的吹塑模具，其中，所述模腔的腔壁上设有至少一道第一凸筋，所述第一凸筋使所述瓶肩上形成第一凹槽。
  3. 根据权利要求2所述的吹塑模具，其中，所述第一凸筋与所述瓶肩的高度方向垂直设置。
  4. 根据权利要求1所述的吹塑模具，其中，所述模腔的腔壁上还设有至少一道第二凸筋，所述第二凸筋使所述瓶身上形成非闭合或环状闭合的第二凹槽。
  5. 根据权利要求4所述的吹塑模具，其中，所述第二凸筋设置在一个平面上或所述第二凸筋呈波浪形设置在所述腔壁上。
  6. 根据权利要求4所述的吹塑模具，其中，所述第二凸筋的数量不少于两个，各个所述第二凸筋相互间隔设置或部分连接。
  7. 根据权利要求1所述的吹塑模具，其中，所述模腔包括第二凹陷区，所述第二凹陷区用于容纳所述把手。
  8. 一种吹瓶机，包含有权利要求1至7任一项所述的吹塑模具。
  9. 一种塑料瓶，由权利要求8所述的吹瓶机制作。
  10. 根据权利要求9所述的塑料瓶，其中，所述塑料瓶的材质为PET。
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