WO2022056959A1 - 吹瓶模具、吹瓶机及塑料瓶 - Google Patents

吹瓶模具、吹瓶机及塑料瓶 Download PDF

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Publication number
WO2022056959A1
WO2022056959A1 PCT/CN2020/118767 CN2020118767W WO2022056959A1 WO 2022056959 A1 WO2022056959 A1 WO 2022056959A1 CN 2020118767 W CN2020118767 W CN 2020118767W WO 2022056959 A1 WO2022056959 A1 WO 2022056959A1
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WO
WIPO (PCT)
Prior art keywords
bottle
handle
mold
blowing
shoulder
Prior art date
Application number
PCT/CN2020/118767
Other languages
English (en)
French (fr)
Inventor
邹大群
黄孝林
Original Assignee
广州达意隆包装机械股份有限公司
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 CN202010981810.5A external-priority patent/CN112060549A/zh
Priority claimed from CN202022047986.1U external-priority patent/CN212603333U/zh
Application filed by 广州达意隆包装机械股份有限公司 filed Critical 广州达意隆包装机械股份有限公司
Priority to EP20953817.2A priority Critical patent/EP4215338A1/en
Priority to JP2023504055A priority patent/JP2023540166A/ja
Priority to US18/020,576 priority patent/US20230302712A1/en
Publication of WO2022056959A1 publication Critical patent/WO2022056959A1/zh

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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
    • 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
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • 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
    • 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
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • 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
    • 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

Definitions

  • the present application relates to the technical field of blowing, such as 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, firmer body and more resistance than the bottle made of HDPE material. It has the advantages of high oxygen performance and transparency and easy observation.
  • the bottles made of PET need to be made with rear handles, and the handles in the bottles made of PET with rear handles require special 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 blank in the handle part of the preform can only be stretched horizontally and cannot be stretched vertically. Therefore, it is necessary to carry out technical treatment on the handle part during the heating process of the preform to prevent the handle part from being deformed due to the high temperature and then softening during the bottle blowing process, thereby causing the blowing failure.
  • 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.
  • the temperature of the handle part is lower, and the temperature of the bottle body part is higher, so that the preform in the bottle body part is softer than the preform in the handle part.
  • the material first expands and fills the bottle body part of the mold.
  • the handle part of the bottle embryo has not yet been attached to the inner wall of the mold.
  • the blank of the bottle body will push the handle part to the inner wall of the mold under the action of compressed air, and finally stick to the mold together with the blank of the handle part under the action of the compressed air.
  • wrinkles are easily formed on the shoulder opposite the handle, and the lower end of the handle is also prone to move up, resulting in unqualified bottle quality.
  • the present application provides a bottle blowing mold and a bottle blowing machine, which can form a non-closed or annularly closed first groove on the bottle body, prevent wrinkles from forming on the bottle shoulder and avoid deformation of the handle.
  • the present application provides a plastic bottle, which is blown from a bottle embryo 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 bottle blowing 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, and the cavity wall of the mold cavity is provided with at least one first convex
  • the first convex rib forms a non-closed or annularly closed first groove on the bottle body.
  • a second convex rib is further provided on the cavity wall, and the second convex rib forms a second groove at the junction of the bottle shoulder and the bottle body.
  • the first rib is arranged on a plane or the first rib is arranged on the cavity wall in a wave shape.
  • the number of the first protruding ribs is not less than two, and each of the first protruding ribs is arranged at intervals or partially connected to each other.
  • At least one third convex rib is further provided on the cavity wall, and the third convex rib forms a non-closed third groove on the bottle shoulder.
  • the mold cavity includes a first concave area, and the first concave area forms a raised step structure on the bottle neck.
  • 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 bottle blowing mold described in any of the above technical 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 bottle blowing mold of the present application is provided with at least one first convex rib on the cavity wall of the mold cavity.
  • the first convex rib forms an annular closed or non-closed first groove on the bottle body, and the first convex rib restricts the bottle body During the blowing process, the preforms in the parts move to the shoulder and the handle to prevent wrinkles on the shoulder and deformation of the handle, which improves the blowing quality of the preform.
  • the plastic bottle produced by the bottle blowing 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 a schematic diagram when a conventional mold is used to blow a preform with a handle
  • Fig. 3 is the schematic diagram after the conventional mold is used to blow the preform with its own handle
  • Fig. 4 is the enlarged view of A place in Fig. 3;
  • Fig. 5 is the enlarged view of B place in Fig. 3;
  • FIG. 6 is a schematic diagram of the bottle blowing mold according to the embodiment of the application before blowing the bottle preform with its own handle;
  • FIG. 7 is a schematic diagram of the process of blowing the bottle preform with its own handle by the bottle blowing mold according to the embodiment of the application;
  • FIG. 8 is a schematic diagram of the bottle blowing mold according to the embodiment of the application when the blowing of the preform with the handle is nearly completed;
  • FIG. 9 is a schematic diagram of the bottle blowing mold according to the embodiment of the application after blowing the self-handled preform
  • Figure 10 is an enlarged view at C in Figure 9;
  • FIG. 11 is a perspective view of a plastic bottle according to an embodiment of the application.
  • FIG. 12 is a schematic diagram of a cavity structure of a bottle blowing mold according to another embodiment of the application.
  • Figure 13 is an enlarged view at D in Figure 12;
  • Figure 14 is an enlarged view at E in Figure 12;
  • Fig. 15 is a perspective view of a plastic bottle blown by the bottle blowing mold shown in Fig. 12;
  • 16 is a schematic diagram of a cavity structure of a bottle blowing mold according to another embodiment of the application.
  • Fig. 17 is a perspective view of a plastic bottle blown by using the bottle blowing mold shown in Fig. 16;
  • FIG. 18 is a schematic diagram of a cavity structure of a bottle blowing mold according to another embodiment of the application.
  • Fig. 19 is a perspective view of a plastic bottle blown by using the blow mold shown in Fig. 18;
  • 20 is a schematic view of the cavity structure of the blowing mold according to other embodiments of the application.
  • Figure 21 is a perspective view of a plastic bottle blown using the bottle blowing mold shown in Figure 20;
  • FIG. 22 is a schematic perspective view of a bottle blowing mold according to an embodiment of the application.
  • 1' conventional mold; 1, blowing mold; 10, cavity; 11, left half mold; 12, right half mold; 13, bottom mold; 101, first rib; 102, second rib; 103, The third rib; 104, the first recessed area; 105, the second recessed area; 100, the preform; 100', the plastic bottle; 110, the bottle body; 120, the bottle shoulder; 1201, the first fold; 1202, the second 130, handle; 140, bottle neck; 200, stretching rod; 1100, first groove; 1200, second groove; 1300, third groove; 1400, step structure.
  • a first feature "on” or “under” a second feature may include the first and second features in direct contact, 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 manufacture the preform 100 first, and then blow the preform 100 with a specific mold.
  • the preform at the bottle body 110 first expands and fills the lower part of the mold cavity 10.
  • the preform is The handle 130 of the 100 has not yet been attached to the cavity wall of the mold cavity 10.
  • the blank on the bottle body 110 will push the handle 130 to the cavity wall of the mold cavity 10 under the action of compressed air, and 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 first wrinkle 1201 (as shown in FIG.
  • the bottle blowing mold 1 of the present embodiment has a mold cavity 10 .
  • a bottle body 110 After the preform 100 is blown, a bottle body 110 , a bottle shoulder 120 , a handle 130 and a neck 140 are formed in the mold cavity 10 .
  • the shoulder 120 is located between the bottle body 110 and the bottle neck 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 140, both ends of the handle 130 can also be connected with the bottle shoulder 120,
  • At least one first convex rib 101 is provided on the cavity wall, and the first convex rib 101 forms a non-closed or annularly closed first groove 1100 on the bottle body 110 .
  • the bottle blowing mold 1 of this embodiment is provided with at least one first rib 101 on the cavity wall of the mold cavity 10.
  • the first rib 101 forms a non-closed or annularly closed first groove 1100 on the bottle body 110.
  • the first rib 101 restricts the blanks on the bottle body 110 from moving to the shoulder 120 and the handle 130 during the blowing process, preventing the first wrinkles 1201 from being generated at the shoulder 120, preventing the handle 130 from being deformed, and improving the blowing of the bottle blank 100. quality.
  • the setting position of the first protruding ribs 101 can be selected to be close to the bottle shoulder 120, so as to obtain a better effect of restricting the movement of the blanks.
  • first grooves 1100 also play a role in enhancing the structural strength of the bottle body 110, and multiple first grooves 1100 can be obtained by arranging multiple first ribs 101, thereby greatly improving the structural strength of the bottle body 110, so that the It is not easily deformed.
  • the cavity wall of the mold cavity 10 is further provided with a second convex rib 102 , and the second convex rib 102 forms a second groove 1200 at the junction of the bottle shoulder 120 and the bottle body 110 .
  • the second protruding ribs 102 also have the effect of restricting the movement of the blanks at the bottle body 110 to the shoulders 120 and the handle 130 during the blowing process, which can improve the blowing quality of the bottle blanks 100 .
  • the first convex rib 101 is disposed on a plane or the first convex rib 101 is disposed on the cavity wall in a wave shape, and the specific shape of the first convex rib 101 can be flexibly selected according to actual needs.
  • the first convex rib 101 is in a closed annular shape or a non-closed arc shape, and the first convex rib 101 is arranged on a plane, so that the heights of the first grooves 1100 are the same everywhere .
  • the first rib 101 is wavy, so that the first groove 1100 is also wavy, and the first groove 1100 is not at the same height everywhere.
  • the first protruding ribs 101 may be arranged in the form of being spaced apart from each other, or may be partially connected together. As shown in FIG. 20 and FIG. 21 , each of the first ribs 101 is partially connected, so that a part of each of the first grooves 1100 also overlaps.
  • FIGS. 12 to 15 optionally, at least one third rib 103 is further provided on the cavity wall of the mold cavity 10 , and the third rib 103 forms a non-closed third groove 1300 on the bottle shoulder 120 .
  • FIGS. 6 to 9 show the process of blowing the preform 100 in one embodiment. As shown in FIG. 10 , after the blowing is completed, a second wrinkle 1202 is easily generated at the connection between the bottle shoulder 120 and the neck 140 . By arranging the third rib 103, a third groove 1300 can be formed on the bottle shoulder 120. The third rib 103 restricts the blank of the bottle shoulder 120 from moving to the bottle neck 140 during the blowing process, preventing the bottle shoulder 120 from being connected to the bottle neck. A second pleat 1202 is created at the junction of 140 .
  • the mold cavity 10 includes a first recessed area 104 , and the first recessed area 104 forms a raised step structure 1400 on the bottle neck 140 .
  • the step structure 1400 can accommodate more blanks at the bottle neck 140 , thereby preventing the second wrinkle 1202 from being generated at the connection between the bottle shoulder 120 and the bottle neck 140 .
  • the mold cavity 10 includes a second concave area 105 , and the second concave area 105 is used for accommodating the handle 130 .
  • the shape of the second recessed area 105 matches the shape of the handle 130 so that the handle 130 can be stopped at the correct position during the blowing process of the preform 100 .
  • the blowing 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 between the left half mold 11 and the right half mold 12 .
  • 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 bottle preform 100 is stretched laterally in the embryo 100. After the bottle preform 100 is blown, the blow mold 1 is opened.
  • the embodiments of the present application also provide a bottle blowing machine, which includes the bottle blowing mold 1 of any of the above embodiments, so that the bottle blowing machine can blow the preforms 100 with their own handles 130 with high quality.
  • the embodiment of the present application further provides a plastic bottle 100 ′, which is produced by the above-mentioned blow molding machine.
  • the plastic bottle 100 ′ has its own handle 130 . Instead of adopting the form of installing an independent handle after blowing, the production process is simplified, the production cost is reduced, 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” and the like 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)
  • Ceramic Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

一种吹瓶模具、吹瓶机及塑料瓶，吹瓶模具具有模腔，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，模腔的腔壁上设有至少一道第一凸筋，第一凸筋使瓶身上形成非闭合的或环状闭合的第一凹槽。第一凸筋起到限制瓶身部位的胚料在吹制过程中向瓶肩及把手移动的作用，防止瓶肩处产生褶皱以及避免把手发生变形，提升了瓶胚的吹制质量。采用本申请的吹瓶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。

Description

吹瓶模具、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202010981810.5，以及申请日为2020年9月17日、申请号为202022047986.1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，例如涉及一种吹瓶模具、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，然后在吹瓶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。瓶胚加热后把手部位温度较低，瓶身部位温度较高，使得瓶身部位的胚料比把手部位的胚料软，瓶胚在拉伸吹瓶涨大的过程中，瓶身部位的胚料先涨大并充满模具的瓶身部分，此时瓶胚的把手部位还未贴上模具内壁。继续吹制时，瓶身部位的胚料会在压缩空气的作用下将把手部位推向模具内壁，并最后在压缩空气的作用下与把手部位的胚料一起贴到模具上。瓶胚吹制完成后，把手对面的瓶肩处易形成褶皱，而把手的下端也容易发生上移的现象，造成瓶子的质量不合格。
发明内容
本申请提供了一种吹瓶模具及吹瓶机，可使瓶身上形成非闭合的或环状闭合的第一凹槽，防止瓶肩处形成褶皱并避免把手变形。
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瓶模具，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，所述模腔的腔壁上设有至少一道第一凸筋，所述第一凸筋使所述瓶身上形成非闭合或环状闭合的第一凹槽。
作为本申请的一种可选方案，所述腔壁上还设有第二凸筋，所述第二凸筋使所述瓶肩与所述瓶身的交界处形成第二凹槽。
作为本申请的一种可选方案，所述第一凸筋设置在一个平面上或所述第一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，所述第一凸筋的数量不少于两个，各个所述第一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，所述腔壁上还设有至少一道第三凸筋，所述第三凸筋使所述瓶肩上形成非闭合的第三凹槽。
作为本申请的一种可选方案，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，包含有上述任一技术方案所述的吹瓶模具。
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。
本申请的吹瓶模具在模腔的腔壁上设有至少一道第一凸筋，第一凸筋使瓶身上形成环状闭合的或非闭合的第一凹槽，第一凸筋限制瓶身部位的胚料在吹制过程中向瓶肩及把手部位移动，防止瓶肩处产生褶皱以及避免把手发生变形，提升了瓶胚的吹制质量。采用本申请的吹瓶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进行吹制时的示意图；
图3为采用常规模具对自带把手瓶胚吹制完成后的示意图；
图4为图3中A处的放大图；
图5为图3中B处的放大图；
图6为本申请实施例的吹瓶模具对自带把手瓶胚进行吹制前的示意图；
图7为本申请实施例的吹瓶模具对自带把手瓶胚进行吹制过程中的示意图；
图8为本申请实施例的吹瓶模具对自带把手瓶胚吹制接近完成时的示意图；
图9为本申请实施例的吹瓶模具对自带把手瓶胚吹制完成后的示意图；
图10为图9中C处的放大图；
图11为本申请实施例的塑料瓶的立体示意图；
图12为本申请另一实施例的吹瓶模具的模腔结构示意图；
图13为图12中D处的放大图；
图14为图12中E处的放大图；
图15为采用图12所示的吹瓶模具进行吹制的塑料瓶的立体示意图；
图16为本申请又一实施例的吹瓶模具的模腔结构示意图；
图17为采用图16所示的吹瓶模具进行吹制的塑料瓶的立体示意图；
图18为本申请再一实施例的吹瓶模具的模腔结构示意图；
图19为采用图18所示的吹瓶模具进行吹制的塑料瓶的立体示意图；
图20为本申请其他实施例的吹瓶模具的模腔结构示意图；
图21为采用图20所示的吹瓶模具进行吹制的塑料瓶的立体示意图；
图22为本申请实施例的吹瓶模具的立体示意图。
图中：
1’、常规模具；1、吹瓶模具；10、模腔；11、左半模；12、右半模；13、底模；101、第一凸筋；102、第二凸筋；103、第三凸筋；104、第一凹陷区；105、第二凹陷区；100、瓶胚；100’、塑料瓶；110、瓶身；120、瓶肩；1201、第一褶皱；1202、第二褶皱；130、把手；140、瓶颈；200、拉伸杆；1100、第一凹槽；1200、第二凹槽；1300、第三凹槽；1400、台阶结构。
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5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110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110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上易出现第一褶皱1201(如图4所示)，把手130下端也会向上偏移，使得把手130变形(如图5所示，虚线所示为把手130下端正确的位置)，因而产生了质量缺陷。
如图6至图11所示，本实施例的吹瓶模具1具有模腔10，瓶胚100吹制完成后在模腔10内形成瓶身110、瓶肩120、把手130和瓶颈140，瓶肩120位于瓶身110和瓶颈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140连接，把手130的两端也可以均与瓶肩120连接，模腔10的腔壁上设有至少一道第一凸筋101，第一凸筋101使瓶身110上形成非闭合或环状闭合的第一凹槽1100。
本实施例的吹瓶模具1在模腔10的腔壁上设有至少一道第一凸筋101，第一凸筋101使瓶身110上形成非闭合或环状闭合的第一凹槽1100，第一凸筋101限制瓶身110部位的胚料在吹制过程中向瓶肩120及把手130移动，防止瓶肩120处产生第一褶皱1201，避免把手130发生变形，提升瓶胚100的吹制质量。第一凸筋101的设置位置可选为靠近瓶肩120，以获得较好地限制胚料移动的效 果。此外，第一凹槽1100还起到增强瓶身110结构强度的作用，通过设置多道第一凸筋101可获得多个第一凹槽1100，从而较大地提升瓶身110的结构强度，使其不易变形。
可选的，模腔10的腔壁上还设有第二凸筋102，第二凸筋102使瓶肩120与瓶身110的交界处形成第二凹槽1200。第二凸筋102同样起到限制瓶身110部位的胚料在吹制过程中向瓶肩120及把手130移动的效果，可以提升瓶胚100的吹制质量。
示例性的，第一凸筋101设置在一个平面上或第一凸筋101呈波浪形设置在腔壁上，第一凸筋101的具体形态可以根据实际需要灵活选择。如图12和图16所示，第一凸筋101呈闭合的环状或非闭合的弧线型，且第一凸筋101设置在一个平面上，使得第一凹槽1100各处的高度相同。而如图18和图19所示，第一凸筋101则呈现出波浪形，使得第一凹槽1100也呈现为波浪形，第一凹槽1100各处并不处于同一高度上。
当第一凸筋101的数量大于两个时，第一凸筋101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20和图21所示，各个第一凸筋101部分连接，因而使得各个第一凹槽1100也有一部分发生重合。
如图12至图15所示，可选的，模腔10的腔壁上还设有至少一道第三凸筋103，第三凸筋103使瓶肩120上形成非闭合的第三凹槽1300。图6至图9展示了一个实施例中瓶胚100被吹制的过程，如图10所示，吹制完成后，在瓶肩120和瓶颈140的连接处，容易产生第二褶皱1202。通过设置第三凸筋103，可在瓶肩120上产生出第三凹槽1300，第三凸筋103限制瓶肩120的胚料在吹制过程中向瓶颈140移动，防止瓶肩120与瓶颈140的连接处产生第二褶皱1202。
如图12、图14和图15所示，可选的，模腔10包括第一凹陷区104，第一凹陷区104使瓶颈140上形成凸起的台阶结构1400。台阶结构1400能够使瓶颈140处容纳更多的胚料，从而防止瓶肩120与瓶颈140连接处产生第二褶皱1202。
如图15所示，可选的，模腔10包括第二凹陷区105，第二凹陷区105用于容纳把手130。第二凹陷区105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。
可选的，如图22所示，吹瓶模具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6至图9，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，吹瓶模具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瓶模具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11、图15、图17、图19和图21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. 一种吹瓶模具，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，所述模腔的腔壁上设有至少一道第一凸筋，所述第一凸筋使所述瓶身上形成非闭合或环状闭合的第一凹槽。
  2. 根据权利要求1所述的吹瓶模具，其中，所述腔壁上还设有第二凸筋，所述第二凸筋使所述瓶肩与所述瓶身的交界处形成第二凹槽。
  3. 根据权利要求1所述的吹瓶模具，其中，所述第一凸筋设置在一个平面上或所述第一凸筋呈波浪形设置在所述腔壁上。
  4. 根据权利要求1所述的吹瓶模具，其中，所述第一凸筋的数量不少于两个，各个所述第一凸筋相互间隔设置或部分连接。
  5. 根据权利要求1所述的吹瓶模具，其中，所述腔壁上还设有至少一道第三凸筋，所述第三凸筋使所述瓶肩上形成非闭合的第三凹槽。
  6. 根据权利要求1所述的吹瓶模具，其中，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。
  7. 根据权利要求1所述的吹瓶模具，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任一项所述的吹瓶模具。
  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。
PCT/CN2020/118767 2020-09-17 2020-09-29 吹瓶模具、吹瓶机及塑料瓶 WO2022056959A1 (zh)

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