CN1655989A - 利用片状包装材料管生产连续的密封包装的成型爪 - Google Patents

利用片状包装材料管生产连续的密封包装的成型爪 Download PDF

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Publication number
CN1655989A
CN1655989A CNA038122367A CN03812236A CN1655989A CN 1655989 A CN1655989 A CN 1655989A CN A038122367 A CNA038122367 A CN A038122367A CN 03812236 A CN03812236 A CN 03812236A CN 1655989 A CN1655989 A CN 1655989A
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China
Prior art keywords
pipe
tube
packing
forming
packaging material
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Granted
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CNA038122367A
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CN100352736C (zh
Inventor
S·帕拉迪斯
I·奥尔西尼
R·德皮特里
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Tetra Laval Holdings and Finance SA
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Tetra Laval Holdings and Finance SA
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Publication of CN1655989A publication Critical patent/CN1655989A/zh
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3668—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7373—Joining soiled or oxidised materials
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/822—Transmission mechanisms
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    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/84—Specific machine types or machines suitable for specific applications
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract

公开了一种成型爪(10a，10b，10a`，10b`)，利用填充有流动食品的片状包装材料管(3)生产连续的密封包装(2)，并沿平行于纵轴线(A)的方向输送。成型爪(10a，10b，10a`，10b`)设有密封机构(18，19)，用于密封管(3)的截面；和成型机构(26，29)，用于施加预先确定的形状到两个连续的密封截面之间的管(3)，并具有可与管(3)相互作用的第一和第二表面(29，26)，分别沿横向于和平行于管(3)的轴线(A)的方向延伸，所述第一表面(29)具有凸出部分(28)，可施加压力到正在形成的包装(2)以控制充填。

Description

利用片状包装材料管生产连续的密封包装的成型爪
技术领域
本发明涉及利用填充了流动食品的片状包装材料管生产连续的密封包装的成型爪。
具体地，本发明涉及可用于包装机的成型爪，可利用包装材料管连续生产流动食品的密封包装。
背景技术
许多流动食品，比如水果汁，巴氏杀菌或超高温处理(UHT)的牛奶，葡萄酒，番茄汁等是在由无菌包装材料制成的包装中销售。
这种包装的典型示例是用于液体或可流动食品的平行六面体包装盒，称为Tetra Brik Aseptic(注册商标)，该包装盒是通过折叠和密封层压包装材料卷来生产的。该包装材料具有多层结构，包括一层纤维材料，即纸，在其两面覆盖了热封塑料，即聚乙烯材料层。
在长时间存放产品，比如UHT牛奶，的无菌包装的情况下，包装材料还包括一层隔绝氧气的材料，例如可由铝箔形成，其施加到热封塑料材料层上，并在铝箔上覆盖另一层热封塑料材料，最终形成包装的接触食品的内表面。
如已经知道的，这种包装在全自动包装机上生产，利用成卷的包装材料形成连续的管。成卷的包装材料在包装机上进行杀菌，如通过施加化学消毒剂，如过氧化氢溶液，在灭菌后清除消毒剂，可通过加热从包装材料的表面挥发。
这样的无菌包装材料卷保持在密闭的无菌环境中，并被折叠成圆筒并沿纵向密封形成连续管。包装材料管沿平行于轴线的垂直方向输送，并连续地填充无菌的或消毒处理过的食品，材料管通过成形台输送，在成形台两对或多对成型爪循环和连续地作用于管，沿等距离的截面处进行密封，形成连续的通过各个横向密封条互相连接的枕状包装带，即密封条在正交于管轴线的水平方向延伸。
更具体地，根据已知的技术方案，每对爪在底部铰接到沿与包装材料管平行的垂直引导件上下移动的滑动件，这样，当滑动件在顶端中心位置和底端中心位置之间垂直移动时，爪基本上以“书的方式”绕包装材料管打开和闭合。
为了在沿横向密封包装材料管，各对爪具有与管的相对侧面配合的密封件，其包括加热元件，以局部熔化互相接触的包装材料的塑料层；一个或多个弹性材料制成的压力件，提供机械支撑使管子夹紧到要求的压力。
更具体地，在隔绝层由导电材料片如铝箔形成的包装材料一般用所谓的感应加热密封工艺进行热密封，其中，当两个爪绕管夹紧时，产生感应电流进行局部加热铝片，因此导致热封塑料材料局部熔化。
当完成热封操作，支承于两个爪中一个上的切割件被包装材料管促动和与管互相作用，沿横向密封条的中心线切割，从包装材料管的底端分割出枕状包装。因此，底端是横向密封的，一旦滑动件到达底端中心位置，爪打开以避免与管的上部干涉，枕状包装输送到最终的折叠台，进行机械折叠形成最终的平行六面体形状。
在所介绍和显示的已知技术方案中，例如，欧洲专利申请EP-A-1172299，密封件一般支承在各对爪的水平杆部分。在杆部分之上设有朝前打开的C形成型片，可在相对的密封件进行热密封后，互相配合形成预定形状和体积的空腔，围绕包装材料管并使其形成矩形截面结构。
更具体地，各个成型片包括端壁，从端壁相对的侧向边分别平行于侧壁延伸，与另一成型片的各侧向壁配合，以围绕包装材料管。
为了控制对正在制造的枕状包装的充填，各对成型片的端壁具有各自的凸出部分，可施加压力到或“压迫”包装的侧壁，限制其中食品的数量，得到希望重量的包装。
尽管总的来说相当有效，上述包装填充控制系统仍有改进的空间。
具体地，在小包装的情况下，即具有小面积的侧壁，要实现希望的压迫作用，必须使用相对成型片的端壁明显凸出的凸出部分，这样可导致包装形成不可接受的形状。此外，即使使用明显凸出的凸出部分也不能确保包装有要求的重量。
发明内容
本发明的一个目的是提供一种成型爪，可利用片状包装材料管生产连续的密封包装，可提供对前面所述缺点的简单和低成本的解决方案。
根据本发明，提供了一种成型爪，可利用填充流动食品的片状包装材料管生产连续的密封包装，并沿平行于纵轴线的方向输送。所述爪包括密封机构，用于密封所述管的截面；和成型机构，可施加预定形状到两个连续的密封截面之间的管，所述成型机构包括可与所述管相互作用的第一和第二表面，分别沿横向于和平行于所述管轴线的方向延伸，其特征在于，所述第一表面包括凸出部分，可施加压力到正在形成的包装以控制充填。
附图说明
本发明的两个优选的非限制性实施例通过参考附图以示例的方式进行介绍。附图中：
图1显示了根据本发明的一对成型爪的示意性侧视图，成型爪可作用于片状包装材料管进行横向密封，形成密封包装带；
图2是图1的细部的部分剖开的放大侧视图；
图3显示了图1的一个爪的部分放大的透视图；和
图4是成型台的示意性侧视图，包括根据本发明的不同实施例的多个成型爪。
具体实施方式
图1中的数字1代表整体的成型台，可生产连续的流动食品，如巴氏消毒或高温消毒的牛奶、水果汁、葡萄酒等，的密封包装2。
更具体地，台1可结合包装机(未显示)来连续地利用片状包装材料管3生产包装2。
包装材料具有多层结构(未显示)，包括一层纤维材料，一般是纸，两个侧面覆盖热封塑料材料层，如聚乙烯层。在用于长期保存的食品，如UHT牛奶，的无菌包装的情况下，包装材料还包括一层氧气隔绝材料，如铝箔，其施加到热封塑料材料层上，并被另一层热封塑料材料覆盖，最终形成接触食品的包装内表面。
管3通过已知方式经过纵向折叠和密封成卷的热封片状材料在台1的上游形成，充填了要进行包装的无菌的或消毒处理的食品，并通过已知的方式(未显示)沿平行于纵轴线A的垂直方向输送。
如可从专利申请EP-A-1172299知道的，台1与管3相互作用，在等距离的截面处热封，形成通过横向密封条4连接的枕状包装2垂直带。更具体地，台1沿两个平行的密封线(未显示)热封各密封条4。密封条4然后以已知的方式在密封线之间切开分割出包装2。
如图2部分显示的，台1生产的枕状包装2各自包括与完成的包装，所示示例中是平行六面体，的形状和体积相同的主体部分5，和过渡部分6，连接主体部分5到相邻的密封条4。各过渡部分6由两个横向于轴线A延伸的稍微倾斜的面7构成，与相对的主体部分5形成平面的基本为三角形截面的空腔，具有共用的边，相对的密封条4从共用边突出。在下面的折叠台(未显示)，各个枕状包装2的过渡部分6折叠到相对的主体部分5，使各过渡部分6的面7成为平的，形成完成的包装的端壁。
具体参考图1，台1包括，通过已知方式，两对爪10a，10b(下面只对其中一对进行显示和详细介绍)，爪循环地和连续地作用于管3。
各对爪10a，10b在底部铰接到相对的滑动件11，滑动件沿平行于包装材料管3的相对的垂直引导件12上下移动。更具体地，各对爪10a，10b在通过管3的轴线A的垂直平面P的相对侧对称延伸，并绕各自水平轴线B铰接到相对的滑动件11，以便当滑动件11上下移动时绕管3以基本上“书的形式”打开和闭合。
引导件12位于管3的径向相对的侧面，并相对正交于平面P和通过管3轴线的平面(未显示)对称定位。
两对爪10a，10b交替地与包装材料管3互相作用，在等距离的截面处夹紧和热封管。各个滑动件11的上下移动和爪10a，10b的打开/闭合运动通过促动组件(未显示)以已知方式(未介绍)进行控制，该控制方式对清楚了解本发明没有影响，促动组件包括成对的垂直杆，垂直杆又受到旋转凸轮或伺服马达的控制。
各爪主要包括主体15，其基本具有四边形板的形式，在底端的附近铰接到相对的滑动件11，并支撑各自突出的促动臂16，促动臂16与所述促动组件配合。
爪10a，10b还包括各自的支撑臂17，固定到各自主体15的顶端，支撑臂从主体15沿平行于各轴线B的方向延伸，位于管3的相对侧面。
爪10a，10b的支撑臂17的突出部分分别设置了密封件18，19，在所显示的示例中，具有四边形杆的形式，可与管3相互作用。如附图中所示，密封件18可结合如感应器20，具有两个直线水平的作用表面21，可在包装材料铝层中产生电流和产生局部的焦耳效应，熔化包装材料的互相接触塑料层；密封件19可结合一对弹性材料制成的压力片22，和提供机械支撑以夹紧管3使感应器20的作用表面21达到所要求的压力。
上述各个密封件18，19和爪10a，10b的支撑臂17安装有前开口的C形成型片23，在相对的密封件18，19进行横向密封后，成型片互相配合形成规定形状和体积的空腔，围绕并使管3成形为矩形截面结构。
更具体地，各个爪10a，10b的成型片23包括端壁24，从端壁相对的侧边分别延伸有平行侧壁25，可与另一爪10a，10b的成型片23的侧壁25配合围绕包装材料管3。
各个成型片23因此形成可与管3互相作用的表面26，并沿平行于管3的轴线A的方向延伸。
为了控制对枕状包装2的填充，各对成型片23的表面26最好在其端壁24设置凸出部分27，以施加压力或压迫包装2的主体部分的相对壁。
本发明的一重要特征是各个爪10a，10b也具有另外的从表面29凸出的凸出部分28，形成相对的密封件18，19，横向于轴线A延伸，面对相对的成型片23。即，表面29构成了各个密封件18，19沿管3的运动方向的最下游部分。
当形成各个包装2时，各对爪10a，10b的凸出部分28压到相对的密封件18，19进行密封的过渡部分6的面7，与另一对爪10a，10b的凸出部分27施加到包装2主体部分5的动作一起，压迫包装2，就是说，限制在包装中的食品数量，以控制各个包装2离开台1时的重量，接下来，离开包装机的重量。
根据图4显示的本发明的不同实施例，设有各个凸出部分28的密封件18，19最好结合到欧洲专利申请EP-A-0887263中介绍和公开的链式形成单元或台，整体用数字1`表示，该专利的全部内容本文引用参考。
具体地，如已经知道的，台1`主要包括一对链传送带30，31，设有各自的第一和第二爪10a`，10b`(只显示出一对)。爪支撑各自的密封件18，19，可互相配合与沿轴线A输送的包装材料管3互相作用。
传送带30，31形成各自的循环路径Q和R，各个爪10a`，10b`沿该路径输送，路径在轴线A的两侧延伸。
各传送带30，31，包括带活节的链条32(只是部分显示)，链条沿相对的路径Q，R延伸，其连接由各个爪10a`，10b`形成。
密封件18，19可与各个爪10a`，10b`的主体整体形成，或固定其上。
与对爪10a，10b的介绍和显示类似，爪10a`，10b`可在其顶部设置各自的成型片23。
根据本发明的成型爪10a，10b，10a`，10b`的优点从前面的介绍可以清楚了解。
具体地，除了成型片23上的凸出部分27，在各对爪10a，10b，10a`，10b`的密封件18，19的表面29设置凸出部分28可精确控制压力和最终形成的包装2的重量，不会损害包装的形状。这主要因为另外的凸出部分28可使成型片23上设置不明显凸出的凸出部分27，因此减少了作用于小包装侧壁的凸出部分27的负面影响。
很清楚，对所介绍和显示的成型爪10a，10b，10a`，10b`可进行改变，这并未脱离附属权利要求限定的范围。

Claims (7)

1.一种成型爪(10a，10b，10a`，10b`)，可利用填充有流动食品的片状包装材料管(3)生产连续的密封包装(2)，并沿平行于纵轴线(A)的方向输送；所述爪(10a，10b，10a`，10b`)包括密封机构(18，19)，用于密封所述管(3)的截面；和成型机构(26，29)，可施加预定形状到两个连续的密封截面之间的所述管(3)，所述成型机构包括可与所述管(3)相互作用的第一和第二表面(29，26)，分别沿横向于和平行于所述管(3)轴线(A)的方向延伸，其特征在于，所述第一表面(29)包括凸出部分(28)，可施加压力到正在形成的包装(2)以控制充填。
2.根据权利要求1所述的成型爪，其特征在于，所述第二表面(26)具有另外的凸出部分(27)，可施加压力到正在成型的包装(2)。
3.根据权利要求1或2所述的成型爪，其特征在于，所述密封机构包括与截面相互作用的夹紧部分(18，19)，用于密封所述管(3)，在所述管(3)的移动方向的下游，形成所述第一表面(29)，从所述表面形成所述凸出部分(28)。
4.根据权利要求3所述的成型爪，其特征在于，所述夹紧部分(18)结合加热机构(20)，可局部加热所述管(3)的包装材料。
5.根据权利要求3所述的成型爪，其特征在于，所述夹紧部分(19)结合压力机构(22)，用可弹性屈服的材料制成。
6.根据前面权利要求2到5中任一项所述的成型爪，其特征在于，所述爪包括C形的成型片(23)，形成朝所述管(3)的所述第二表面(26)，其具有所述另外的凸出部分(27)。
7.根据权利要求6所述的成型爪，其特征在于，所述成型片(23)相对所述管(3)的移动方向位于所述夹紧部分(18，19)的上游。
CNB038122367A 2002-05-31 2003-05-29 利用片状包装材料管生产连续的密封包装的成型爪 Expired - Fee Related CN100352736C (zh)

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