WO2022152101A1 - 三次注塑成型内外双层一体式保温饭盒及其加工方法 - Google Patents

三次注塑成型内外双层一体式保温饭盒及其加工方法 Download PDF

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Publication number
WO2022152101A1
WO2022152101A1 PCT/CN2022/071195 CN2022071195W WO2022152101A1 WO 2022152101 A1 WO2022152101 A1 WO 2022152101A1 CN 2022071195 W CN2022071195 W CN 2022071195W WO 2022152101 A1 WO2022152101 A1 WO 2022152101A1
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Prior art keywords
box body
outer box
wall
mouth
inner box
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PCT/CN2022/071195
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English (en)
French (fr)
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张峰
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张峰
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Publication of WO2022152101A1 publication Critical patent/WO2022152101A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
    • A45C11/20—Lunch or picnic boxes or the like
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • B29C2045/14524—Joining articles or parts of a single article making hollow articles

Definitions

  • the invention relates to a heat-insulating lunch box, in particular to a three-time injection-molded inner and outer double-layer integrated heat-insulating lunch box and a processing method thereof.
  • Double-layer thermal insulation lunch boxes and fresh-keeping boxes which include an inner liner and an outer jacket, and a cavity is formed between the inner liner and the outer jacket, and the cavity can reduce heat dissipation and improve the thermal insulation effect.
  • the existing double-layer heat preservation lunch boxes are all made of secondary injection molding, that is, the first pair of molds are used for injection molding of the inner pot, and then the second pair of molds are used for injection molding of the outer jacket, and finally the inner pot is formed by spin welding.
  • the lower end of the flanging and the upper opening of the jacket are welded and connected, but this processing method can only be applied to the processing of round thermal insulation lunch boxes, and cannot process rectangular, oval and polygonal thermal insulation lunch boxes.
  • the purpose of the present invention is to overcome the shortcomings of the prior art, and to provide a three-time injection-molded inner and outer double-layer integrated heat-insulating lunch box that has good thermal insulation and preservation performance, is easy to process, and is suitable for processing different-shaped thermal-insulation lunch boxes, and a processing method thereof.
  • the technical scheme of the three-time injection molding inner and outer double-layer integrated heat preservation lunch box and the processing method thereof of the present invention is that: the inner box body and the outer box body are included, and the outer wall of the upper mouth of the inner box body is provided with side bumps, and the side bumps are made with side bumps.
  • the upper connecting rib and the side connecting rib are provided with an outer box body on the outer wall of the inner box body.
  • a cavity is formed between the outer box body and the inner box body, an outer groove is formed on the outer wall of the upper mouth of the outer box body, and the upper ends of the inner box body and the outer box body are provided with mouth edging, and the mouth edging includes the upper
  • the boss and the side boss the upper boss is provided with an upper wrapping groove, the upper wrapping groove is matched with the outer wall of the upper connecting rib, the inner wall of the side boss is made with an inner wrapping groove, and the inner wrapping groove is matched with the outer wall of the side connecting rib.
  • a lower clamping rib is made below the inner package groove, and the head of the lower clamping rib is clamped into the outer groove.
  • Processing the inner box body using the first pair of injection molds, the inner box body is obtained by injection molding; 2, Processing the outer box body: use the second pair of injection molds to obtain the outer box body; 3. Edge sealing of the inner box body and the outer box body: use the third pair of injection molds to cover the outer box body to the outside of the inner box body, and then seal the inner box body and the outer box body.
  • the inner and outer box bodies are put into the third pair of injection molds together as inserts, so that the upper mouths of the inner and outer box bodies are injection-molded to obtain a mouth edge.
  • the invention discloses a three-time injection molding inner and outer double-layer integrated heat preservation lunch box and a processing method thereof.
  • a first pair of injection molds is used to inject a plastic inner box body.
  • the upper connecting rib and the side connecting rib are made on the bump, and then the plastic outer box body is injection-molded with a second pair of injection molds, and an outer groove is formed on the outer wall of the upper mouth of the outer box body, and then the outer box body is sleeved on the inner box.
  • the inner wall of the upper mouth of the outer box body is tightly sealed with the outer wall of the side bump of the inner box body, and the upper end surface of the outer box body is in sealing contact with the lower end of the side connecting ribs of the inner box body, so that the inner and outer box bodies are in sealing contact.
  • a cavity is formed between them.
  • the combined inner and outer boxes are put into the third pair of injection molds together as inserts for the third injection molding, and the upper ends of the inner and outer boxes are covered with a layer of The edge of the mouth is covered, the upper boss and the side boss are formed on the edge of the mouth, the upper boss is formed with an upper groove, the upper groove covers the upper connecting rib, the inner wall of the side boss is formed with an inner groove, and the inner groove
  • the side connecting rib is covered, and the lower clamping rib is made under the side boss, and the lower clamping rib is matched with the outer groove of the outer wall of the upper mouth of the outer box body, so that the upper mouth of the inner and outer box bodies is sealed and tightly matched ( That is, the edge of the injection molding mouth connects the inner and outer box bodies into one), without the need for rotary welding connection, easy to manufacture, more reliable to assemble, suitable for processing thermal insulation lunch boxes of different shapes, the inner and outer double layers and the hollow structure effectively improve the thermal insulation Insulation performance of the lunch box.
  • the invention discloses a three-time injection molding inner and outer double-layer integrated heat-insulating lunch box and a processing method thereof. With convex ribs, the structural strength of the mouth edge is improved.
  • FIG. 1 is a schematic structural diagram of the three-time injection-molded inner and outer double-layer integrated heat preservation lunch box according to the present invention.
  • FIG. 2 is a partial enlarged schematic diagram of part A of FIG. 1 .
  • the present invention relates to a three-time injection-molded inner and outer double-layer integrated thermal insulation lunch box and a processing method thereof.
  • the invention includes an inner box body 1 and an outer box body 2.
  • the upper mouth and outer wall of the inner box body are made of The side bump 11, the upper connecting rib 12 and the side connecting rib 13 are made on the side bump, the outer box body 2 is arranged on the outer wall of the inner box body 1, and the upper end of the outer box body is matched with the lower end of the upper connecting rib 12.
  • the inner wall of the upper mouth of the outer box body is matched with the outer wall of the side bump 11
  • a cavity 3 is formed between the outer box body 2 and the inner box body 1
  • the outer wall of the upper mouth of the outer box body 2 is made with an outer groove 21
  • the inner box body 2 is formed with an outer groove 21.
  • the upper ends of the body 1 and the outer box body 2 are provided with a mouth wrapping 4.
  • the mouth wrapping includes an upper boss 41 and a side boss 42.
  • the upper boss is provided with an upper wrapping groove 43, which is connected to the upper wrapping groove.
  • the outer wall of the connecting rib 12 is matched, the inner wall of the side boss is formed with an inner wrapping groove 44, and the inner wrapping groove is matched with the outer wall of the side connecting rib 13.
  • the steps of the processing method are as follows: 1. Processing the inner box body: using the first pair of injection molds, injection molding to obtain the inner box body 1; 2. Processing the outer box body: using the second pair of injection molds, injection molding to obtain Outer box body 2; 3. Edge sealing of inner box body and outer box body: use a third pair of injection molds to cover outer box body 2 to the outside of inner box body 1, and then put the inner and outer box bodies together as inserts In the third pair of injection molds, the upper openings of the inner and outer box bodies are injection-molded to obtain the mouth edge 4 .
  • the invention discloses a three-time injection molding inner and outer double-layer integrated heat preservation lunch box and a processing method thereof.
  • a first pair of injection molds is used to inject a plastic inner box body 1, and a side bump 11 is formed on the upper opening of the inner box body.
  • the upper connecting rib 12 and the side connecting rib 13 are made on the side bump, and then the plastic outer box body 2 is injection-molded with a second pair of injection molds, and an outer groove 21 is formed on the outer wall of the upper mouth of the outer box body.
  • the box body is sleeved to the outside of the inner box body, wherein the inner wall of the upper mouth of the outer box body is tightly fitted with the outer wall of the side bump 11 of the inner box body, and the upper end face of the outer box body is sealed with the lower end of the side connecting ribs 13 of the inner box body. contact, so that a cavity 3 is formed between the inner and outer boxes.
  • the combined inner and outer boxes are put into the third pair of injection molds together as inserts, and the third injection molding is performed.
  • the upper end of the outer box body is covered with a layer of mouth wrapping 4, an upper boss 41 and a side boss 42 are formed on the mouth wrapping, an upper wrapping groove 43 is formed under the upper boss, and the upper wrapping groove wraps the upper connection Rib 12, the inner wall of the side boss is provided with an inner wrapping groove 44, the inner wrapping groove wraps the side connecting rib 13, and a lower clamping rib 45 is made below the side boss, and the lower clamping rib and the outer groove 21 of the outer wall of the upper mouth of the outer box body 2 Therefore, the upper mouth of the inner and outer box bodies can be sealed and tightly fitted (that is, the inner and outer box bodies are connected by the injection molding mouth edge 4), and there is no need to rotate the welding connection.
  • the inner and outer layers are double-layered with a hollow structure, which effectively improves the thermal insulation performance of the thermal insulation lunch box.
  • the mouth wrapping 4 is provided with a convex rib 46 at the lower end of the side connecting rib 13 . With the convex ribs, the structural strength of the mouth wrapping 4 is improved.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
  • Packages (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

三次注塑成型内外双层一体式保温饭盒及其加工方法，保温饭盒包括内盒体（1）和外盒体（2），内盒体（1）制有侧凸块（11），侧凸块（11）制有上连接筋（12）和侧连接筋（13），内盒体（1）外壁设外盒体（2），外盒体（2）与内盒体（1）之间形成空腔（3），外盒体（2）上口外壁制有外凹槽（21），内盒体（1）和外盒体（2）上端设置口部包边（4），口部包边（4）包括上凸台（41）和侧凸台（42），上凸台（41）制有上包槽（43），侧凸台（42）制有内包槽（44）和下卡筋（45），下卡筋（45）头部卡入外凹槽（21）中，加工方法的步骤如下：①、加工内盒体（1）：采用第一副注塑模具，注塑得到内盒体（1）；②、加工外盒体（2）：采用第二副注塑模具，注塑得到外盒体（2）；③、内盒体（1）和外盒体（2）封边：采用第三副注塑模具，将外盒体（2）套到内盒体（1）外部，再一起放入第三副注塑模具中，使内盒体（1）和外盒体（2）上口注塑得到口部包边（4）。

Description

三次注塑成型内外双层一体式保温饭盒及其加工方法 技术领域
本发明涉及保温饭盒，特别是涉及三次注塑成型内外双层一体式保温饭盒及其加工方法。
 背景技术
传统的保温饭盒、保鲜盒等通常为单层结构，其保温能力差，热量散发快。因此人们发明了双层的保温饭盒、保鲜盒，其包括内胆和外套，在内胆和外套之间形成空腔，该空腔可减少热量的散发，提高保温效果。但已有的双层保温饭盒都是采用二次注塑成型，即先采用第一副模具对内胆注塑成型，再采用第二副模具对外套注塑成型，最后通过旋转焊接的形式将内胆的翻边下端和外套上口焊接相连，但该加工方法只能适用于加工圆形的保温饭盒，无法加工矩形、椭圆形、多边形的保温饭盒。
 技术问题
本发明的目的是为了克服已有技术存在的缺点，提供一种保温、保鲜性能好，加工方便，适用于加工不同形状保温饭盒的三次注塑成型内外双层一体式保温饭盒及其加工方法。
 技术解决方案
本发明三次注塑成型内外双层一体式保温饭盒及其加工方法的技术方案是：包括内盒体和外盒体，在内盒体的上口外壁制有侧凸块，侧凸块上制有上连接筋和侧连接筋，在内盒体的外壁设置外盒体，外盒体的上口端部与上连接筋下端相配合，外盒体的上口内壁与侧凸块外壁相配合，外盒体与内盒体之间形成空腔，外盒体上口外壁制有外凹槽，在内盒体和外盒体的上端设置口部包边，所述的口部包边包括上凸台和侧凸台，上凸台下制有上包槽，上包槽与上连接筋外壁相配合，侧凸台内壁制有内包槽，内包槽与侧连接筋外壁相配合，侧凸台位于内包槽下方制有下卡筋，下卡筋头部卡入外凹槽中，加工方法的步骤如下：①、加工内盒体：采用第一副注塑模具，注塑得到内盒体；②、加工外盒体：采用第二副注塑模具，注塑得到外盒体；③、内盒体和外盒体封边：采用第三副注塑模具，将外盒体套到内盒体外部，再将内、外盒体作为嵌件一起放入第三副注塑模具中，使内、外盒体的上口注塑得到口部包边。
 有益效果
本发明公开了一种三次注塑成型内外双层一体式保温饭盒及其加工方法，先采用第一副注塑模具将塑料内盒体注塑成型，在内盒体的上口制有侧凸块，侧凸块上制有上连接筋和侧连接筋，再用第二副注塑模具将塑料外盒体注塑成型，在外盒体的上口外壁制有外凹槽，接着将外盒体套到内盒体外部，其中外盒体的上口内壁与内盒体的侧凸块外壁卡紧密封紧配合，外盒体的上端面与内盒体的侧连接筋下端密封接触，使内、外盒体之间形成一个空腔，此时将组合好的内、外盒体作为嵌件一起放入第三副注塑模具中，进行第三次注塑成型，在内、外盒体的上端包覆一层口部包边，口部包边上制有上凸台和侧凸台，上凸台下制有上包槽，上包槽包住上连接筋，侧凸台内壁制有内包槽，内包槽包住侧连接筋，侧凸台的下方制有下卡筋，下卡筋与外盒体上口外壁的外凹槽配合，从而使内、外盒体的上口部得到密封包紧配合（即注塑口部包边将内、外盒体相连成一体），无需旋转焊接连接，制造方便，装配更加可靠，适用于加工不同形状的保温饭盒，内外双层加中空结构，有效的提高了保温饭盒的保温性能。
本发明三次注塑成型内外双层一体式保温饭盒及其加工方法，所述的口部包边位于侧连接筋下端制有凸筋。有了凸筋，提高口部包边的结构强度。
 附图说明
图1是本发明三次注塑成型内外双层一体式保温饭盒的结构示意图。
图2是图1的A处局部放大示意图。
 本发明的实施方式
本发明涉及一种三次注塑成型内外双层一体式保温饭盒及其加工方法，如图1—图2所示，包括内盒体1和外盒体2，在内盒体的上口外壁制有侧凸块11，侧凸块上制有上连接筋12和侧连接筋13，在内盒体1的外壁设置外盒体2，外盒体的上口端部与上连接筋12下端相配合，外盒体的上口内壁与侧凸块11外壁相配合，外盒体2与内盒体1之间形成空腔3，外盒体2上口外壁制有外凹槽21，在内盒体1和外盒体2的上端设置口部包边4，所述的口部包边包括上凸台41和侧凸台42，上凸台下制有上包槽43，上包槽与上连接筋12外壁相配合，侧凸台内壁制有内包槽44，内包槽与侧连接筋13外壁相配合，侧凸台42位于内包槽44下方制有下卡筋45，下卡筋头部卡入外凹槽21中，加工方法的步骤如下：①、加工内盒体：采用第一副注塑模具，注塑得到内盒体1；②、加工外盒体：采用第二副注塑模具，注塑得到外盒体2；③、内盒体和外盒体封边：采用第三副注塑模具，将外盒体2套到内盒体1外部，再将内、外盒体作为嵌件一起放入第三副注塑模具中，使内、外盒体的上口注塑得到口部包边4。
本发明公开了一种三次注塑成型内外双层一体式保温饭盒及其加工方法，先采用第一副注塑模具将塑料内盒体1注塑成型，在内盒体的上口制有侧凸块11，侧凸块上制有上连接筋12和侧连接筋13，再用第二副注塑模具将塑料外盒体2注塑成型，在外盒体的上口外壁制有外凹槽21，接着将外盒体套到内盒体外部，其中外盒体的上口内壁与内盒体的侧凸块11外壁卡紧密封紧配合，外盒体的上端面与内盒体的侧连接筋13下端密封接触，使内、外盒体之间形成一个空腔3，此时将组合好的内、外盒体作为嵌件一起放入第三副注塑模具中，进行第三次注塑成型，在内、外盒体的上端包覆一层口部包边4，口部包边上制有上凸台41和侧凸台42，上凸台下制有上包槽43，上包槽包住上连接筋12，侧凸台内壁制有内包槽44，内包槽包住侧连接筋13，侧凸台的下方制有下卡筋45，下卡筋与外盒体2上口外壁的外凹槽21配合，从而使内、外盒体的上口部得到密封包紧配合（即注塑口部包边4将内、外盒体相连成一体），无需旋转焊接连接，制造方便，装配更加可靠，适用于加工不同形状的保温饭盒，内外双层加中空结构，有效的提高了保温饭盒的保温性能。所述的口部包边4位于侧连接筋13下端制有凸筋46。有了凸筋，提高口部包边4的结构强度。

Claims (2)

  1. 三次注塑成型内外双层一体式保温饭盒及其加工方法，其特征在于：包括内盒体（1）和外盒体（2），在内盒体的上口外壁制有侧凸块（11），侧凸块上制有上连接筋（12）和侧连接筋（13），在内盒体（1）的外壁设置外盒体（2），外盒体的上口端部与上连接筋（12）下端相配合，外盒体的上口内壁与侧凸块（11）外壁相配合，外盒体（2）与内盒体（1）之间形成空腔（3），外盒体（2）上口外壁制有外凹槽（21），在内盒体（1）和外盒体（2）的上端设置口部包边（4），所述的口部包边包括上凸台（41）和侧凸台（42），上凸台下制有上包槽（43），上包槽与上连接筋（12）外壁相配合，侧凸台内壁制有内包槽（44），内包槽与侧连接筋（13）外壁相配合，侧凸台（42）位于内包槽（44）下方制有下卡筋（45），下卡筋头部卡入外凹槽（21）中，加工方法的步骤如下：
    ①、加工内盒体：采用第一副注塑模具，注塑得到内盒体（1）；
    ②、加工外盒体：采用第二副注塑模具，注塑得到外盒体（2）；
    ③、内盒体和外盒体封边：采用第三副注塑模具，将外盒体（2）套到内盒体（1）外部，再将内、外盒体作为嵌件一起放入第三副注塑模具中，使内、外盒体的上口注塑得到口部包边（4）。
  2. 如权利要求1所述的三次注塑成型内外双层一体式保温饭盒及其加工方法，其特征在于：所述的口部包边（4）位于侧连接筋（13）下端制有凸筋（46）。
PCT/CN2022/071195 2021-01-18 2022-01-11 三次注塑成型内外双层一体式保温饭盒及其加工方法 WO2022152101A1 (zh)

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CN202110062467.9 2021-01-18
CN202110062467.9A CN112841840A (zh) 2021-01-18 2021-01-18 三次注塑成型内外双层一体式保温饭盒及其加工方法

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