GB2456122A - Controlling heating rollers in a laminator - Google Patents

Controlling heating rollers in a laminator Download PDF

Info

Publication number
GB2456122A
GB2456122A GB0809513A GB0809513A GB2456122A GB 2456122 A GB2456122 A GB 2456122A GB 0809513 A GB0809513 A GB 0809513A GB 0809513 A GB0809513 A GB 0809513A GB 2456122 A GB2456122 A GB 2456122A
Authority
GB
United Kingdom
Prior art keywords
heating roller
laminator
heating
temperature
rotated
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.)
Withdrawn
Application number
GB0809513A
Other versions
GB0809513D0 (en
Inventor
Yen-Te Lee
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.)
Primax Electronics Ltd
Original Assignee
Primax Electronics 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
Application filed by Primax Electronics Ltd filed Critical Primax Electronics Ltd
Priority to GB0809513A priority Critical patent/GB2456122A/en
Publication of GB0809513D0 publication Critical patent/GB0809513D0/en
Publication of GB2456122A publication Critical patent/GB2456122A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/245—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved contactless, e.g. by radiation
    • 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
    • B29C66/45—Joining of substantially the whole surface of the articles
    • 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
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/748—Joining plastics material to non-plastics material to natural products or their composites, not provided for in groups B29C66/742 - B29C66/746
    • B29C66/7486—Paper, e.g. cardboard
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/87—Auxiliary operations or devices
    • B29C66/872—Starting or stopping procedures
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
    • B32B37/182—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only one or more of the layers being plastic
    • B32B37/185—Laminating sheets, panels or inserts between two discrete plastic layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B41/00—Arrangements for controlling or monitoring lamination processes; Safety arrangements
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • 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
    • B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
    • B29K2311/12—Paper, e.g. cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
    • B32B2037/0061—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus the apparatus being an office laminator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B41/00—Arrangements for controlling or monitoring lamination processes; Safety arrangements
    • B32B2041/06—Starting the lamination machine or method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/70—Automated, e.g. using a computer or microcomputer
    • B32B2309/72—For measuring or regulating, e.g. systems with feedback loops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • B32B38/004—Heat treatment by physically contacting the layers, e.g. by the use of heated platens or rollers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

In the preheating stage in a laminator (figure 2A), the rotational directions of the heating rollers are reverse to those during the heating and pressing operation (figure 2B). As a consequence, the article fails to be transported across the region between the heating rollers before the heating and pressing operation is performed.

Description

METHOD FOR CONTROLLING HEATING ROLLERS AND LAMINATOR
USING SUCH METHOD
FIELD OF THE INVENTION
100011 The present invention relates to a laminator, and more particularly to a laminator having a mechanism of preventing the laminated object from being transported across the region between the heating rollers in the preheating stage. The present invention also relates to a method for controlling the heating rollers of the laminator.
BACKGROUND OF THE INVENTION
100021 Conventionally, a valuable sheet article such as a paper sheet or a photograph is usually covered with a protective film for protection because such an article is readily suffered from damage. Typically, a laminator is used for laminating a sheet article between two pieces of plastic films.
100031 FIG. 1 A and FIG. 1 B are schematic cross-sectional views of a conventional laminator. Hereinafter, operations of the conventional laminator will be illustrated in more details with reference to FIG. 1 A and FIG. I B. The laminator 1 principally comprises an entrance channel 10, a first heating roller 11, a second heating roller 12, a heating unit 13 and an exit channel 14. After the laminator 1 is powered on, the heat offered by the heating unit 13 is transferred to the first heating roller 11 and the second heating roller 12 in order to perform a preheating operation. In the preheating stage, the first heating roller 11 is rotated in a second direction R2 and the second heating roller 12 is rotated in a first direction Rl, wherein the first direction Ri is opposed to the second direction R2. Upon rotation of the first heating roller 11 and the second heating roller 12, the heat offered by the heating unit 13 may be more uniformly transferred to the first heating roller 11 and the second heating roller 12. After the preheating operation is completed, a laminated object 15 of a sheet article 1 5C intervening between a first plastic film 1 5A and a second plastic film 1 5B is fed into the laminator 1 through the entrance channel 10. Next, the laminated object 15 is transported by the first heating roller 11 and the second heating roller 12 while both sides of the laminated object 15 are heated and pressed by the first heating roller 11 and the second heating roller 12. During the laminated object 15 is heated and pressed by the first heating roller 11 and the second heating roller 12, the first plastic film 1 5A and the second plastic film 15B are thermally softened and thus the sheet article 15C is laminated between the first plastic film 1 5A and the second plastic film 1 5B. After the laminated object 15 is ejected from the exit channel 14, the laminating operation is completed.
100041 The laminator 1, however, still has some drawbacks. For example, if the laminated object 15 of the sheet article 1 5C intervening between the first plastic film 1 5A and the second plastic film 1 5B is fed into the laminator 1 in the preheating stage, the laminated object 15 will be transported by the first heating roller 11 and the second heating roller 12 because the first heating roller 11 is rotated in the second direction R2 and the second heating roller 12 is rotated in the first direction RI. Since the temperature of the heating roller 11 or 12 is not enough to perform the heating and pressing operation, the first plastic film I 5A and the second plastic film 1 5B transported across the heating rollers 11 and 12 are not sufficiently softened. Under this circumstance, the sheet article 1 SC fails to be successfully laminated between the first plastic film 1 5A and the second plastic film 1 5B or some hazy bubbles are readily formed in the resulting structure to blur the sheet article 1 5C.
100051 For enhancing the performance of the laminator, there is a need of providing a proper protecting mechanism to prevent from feeding the laminated object into the laminator before the heating rollers reach the working temperature required for performing the heating and pressing operation.
SUMMARY OF THE INVENTION
[00061 It is an object of the present invention to provide a laminator having a mechanism of reversing rotating the heating rollers in the preheating stage, thereby preventing the laminated object from being transported across the region between the heating rollers. As a result, the problems of causing poor laminating effect or forming hazy bubbles can be overcome.
[00071 Another object of the present invention provides a method for controlling the heating rollers of the laminator.
[00081 In accordance with an aspect of the present invention, there is provided a laminator for heating and pressing a laminated object. The laminator includes a first heating roller and a second heating roller. The first heating roller is rotated in a first direction and the second heating roller is rotated in a second direction in a preheating stage of the laminator, wherein the first direction is opposed to the second direction. The first heating roller is rotated in the second direction and the second heating roller is rotated in the first direction during a heating and pressing operation of the laminator.
[0009J In an embodiment, the laminator is in the preheating stage if the temperature of the first heating roller is smaller than a working temperature.
100101 In an embodiment, the laminator performs the heating and pressing operation if the temperature of the first heating roller is not smaller than a 100111 In an embodiment, the laminator further comprises a temperature sensor for detecting the temperature of the first heating roller.
[00121 In accordance with another aspect of the present invention, there is provided a method for controlling heating rollers of a laminator. The laminator includes a first heating roller and a second heating roller. The method includes steps of detecting the temperature of the first heating roller; driving the first heating roller to rotate in a first direction and driving the second heating roller to rotate in a second direction if the temperature of the first heating roller is smaller than a working temperature, wherein the first direction is opposed to the second direction; and driving the first heating roller to rotate in the second direction and driving the second heating roller to rotate in the first direction if the temperature of the first heating roller is not smaller than the working temperature.
100131 The above objects and advantages of the present invention will become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed description and accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
[00141 FIG 1A is a schematic cross-sectional view illustrating a conventional laminator; [0015J FIG lB is a schematic cross-sectional view illustrating a laminated object fed into the laminator of FIG IA in the preheating stage; 100161 FIG 2A is a schematic cross-sectional view illustrating a laminator according to a preferred embodiment of the present invention, in which the laminated object fails to be transported across the region between two heating rollers; and [00171 FIG 2B is a schematic cross-sectional view illustrating a laminated object fed into the laminator of FIG 2A during the heating and pressing operation.
DETAiLED DESCRIPTION OF THE PREFERRED EMBODIMENT
100181 For obviating the drawbacks encountered from the prior art, the present invention provides a laminator and a method of controlling heating rollers of the laminator.
[00191 FIG. 2A and FIG. 2B are schematic cross-sectional views illustrating a laminator according to a preferred embodiment of the present invention. Hereinafter, operations of the laminator will be illustrated in more details with reference to FIG. 2A and FIG. 2B.
100201 The laminator 2 principally comprises an entrance channel 20, a first heating roller 21, a second heating roller 22, a heating unit 12, an exit channel 24 and a temperature sensor 26. After the laminator 2 is powered on, the heat offered by the heating unit 23 is transferred to the first heating roller 21 and the second heating roller 22 in order to perform a preheating operation. In the preheating stage as shown in FIG. 2A, the first heating roller 21 is rotated in a first direction RI and the second heating roller 22 is rotated in a second direction R2, wherein the first direction Ri is opposed to the second direction R2. Upon rotation of the first heating roller 21 and the second heating roller 22, the heat offered by the heating unit 23 may be more uniformly transferred to the first heating roller 21 and the second heating roller 22. On the other hand, since the rotational directions of the first heating roller 21 and the second heating roller 22 in the preheating stage are reverse to those during the heating and pressing operation, any article fails to be transported across the region between the first heating roller 21 arid the second heating roller 22. In other words, even if a laminated object 25 of a sheet article 25C intervening between a first plastic film 25A and a second plastic film 25B is inserted into the entrance channel 20 in the preheating stage, the laminated object 25 fails to be transported by the first heating roller 21 and the second heating roller 22 into the laminator 2 but ejects the laminated object 25 out of the entrance channel 20.
100211 Until the first heating roller 21 or the second heating roller 22 of the laminator 2 reach the working temperature required for performing the heating and pressing operation, the first heating roller 21 and the second heating roller 22 are reversely rotated. As shown in FIG. 2B, the first heating roller 21 is rotated in the second direction R2 and the second heating roller 22 is rotated in the first direction RI. Next, a laminated object 25 of a sheet article 25C intervening between a first plastic film 25A and a second plastic film 25B is fed into the laminator 2 through the entrance channel 20. The laminated object 25 is transported by the first heating roller 21 and the second heating roller 22 while both sides of the laminated object 25 are heated and pressed by the first heating roller 21 and the second heating roller 22. During the laminated object 25 are heated and pressed by the first heating roller 21 and the second heating roller 22, the first plastic film 25A and the second plastic film 25B are thermally softened and thus the sheet article 25C is laminated between the first plastic film 25A and the second plastic film 25B. After the laminated object 25 is ejected to the exit channel 24, the laminating operation is completed.
100221 Please refer to FIG. 2A and FIG. 2B again. The temperature sensor 26 of the laminator is used to discriminate whether the first heating roller 21 or the second heating roller 22 reaches its working temperature. The temperature sensor 26 is disposed beside the first heating roller 21 or the second heating roller 22 for detecting the temperature of the first heating roller 21 or the second heating roller 22. In a case that the temperature of the first heating roller 21 or the second heating roller 22 is smaller than a predetermined working temperature or a user-defined working temperature afier the laminator 2 is powered on, it is meant that the laminator 2 is still in the preheating stage and thus no heating and pressing operation should be done. Meanwhile, as shown in FIG. 2A, the first heating roller 21 is rotated in a first direction Ri and the second heating roller 22 is rotated in a second direction R2 so as to prevent the laminated object 25 from being transported across the region between the first heating roller 21 and the second heating roller 22. Whereas, if the temperature of the first heating roller 21 or the second heating roller 22 is not smaller than (i.e. greater than or equal to) the predetermined working temperature or the user-defined working temperature, it is meant that the laminator 2 can perform the heating and pressing operation. Meanwhile, the first heating roller 21 and the second heating roller 22 are reversely rotated. As shown in FIG. 2B, the first heating roller 21 is rotated in the second direction R2 and the second heating roller 22 is rotated in the first direction Ri so as to feed the laminated object 25 into the laminator 2 and perform the heating and pressing operation.
100231 Please refer to FIG. 2A and FIG. 2B again. The present invention also relates to a method of controlling the heating rollers of the laminators.
The method comprises the following steps. First of all, the temperature of the first heating roller 21 or the second heating roller 22 is detected. If the temperature of the first heating roller 21 or the second heating roller 22 is smaller than a working temperature, the first heating roller 21 is rotated in a first direction Ri and the second heating roller 22 is rotated in a second direction R2 (wherein the first direction Ri is opposed to the second direction P.2) so as to prevent the laminated object 25 from being transported across the region between the first heating roller 21 and the second heating roller 22. If the temperature of the first heating roller 21 or the second heating roller 22 is not smaller than the working temperature, the first heating roller 21 is rotated in the second direction R2 and the second heating roller 22 is rotated in the first direction Ri so as to perform the heating and pressing operation 100241 In the above embodiments, the first heating roller 21 and the second heating roller 22 of the laminator 2 are bi-directionally driven by a driving mechanism including a motor and a gear. Moreover, those skilled in the art will readily observe that numerous modifications of adjusting the rotating speeds of the heating rollers 21 and 22 may be made while retaining the teachings of the invention.
100251 While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.

Claims (5)

  1. WHAT IS CLAIMED IS: 1. A laminator for heating and pressing a laminated object, said laminator comprising: a first heating roller; and a second heating roller; wherein said first heating roller is rotated in a first direction and said second heating roller is rotated in a second direction in a preheating stage of said laminator, and said first heating roller is rotated in said second direction and said second heating roller is rotated in said first direction during a heating and pressing operation of said laminator, in which said first direction is opposed to said second direction.
  2. 2. The laminator according to claim 1 wherein said laminator is in said preheating stage if the temperature of said first heating roller is smaller than a
  3. 3. The laminator according to claim 1 wherein said laminator performs said heating and pressing operation if the temperature of said first heating roller is not smaller than a working temperature.
  4. 4. The laminator according to claim 1 wherein said laminator further comprises a temperature sensor for detecting the temperature of said first heating roller.
  5. 5. A method for controlling heating rollers of a laminator, said laminator comprising a first heating roller and a second heating roller, said method comprising steps of: detecting the temperature of said first heating roller; driving said first heating roller to rotate in a first direction and driving said second heating roller to rotate in a second direction if the temperature of said first heating roller is smaller than a working temperature, wherein said first direction is opposed to said second direction; and driving said first heating roller to rotate in said second direction and driving said second heating roller to rotate in said first direction if the temperature of said first heating roller is not smaller than said working temperature.
GB0809513A 2008-05-23 2008-05-23 Controlling heating rollers in a laminator Withdrawn GB2456122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0809513A GB2456122A (en) 2008-05-23 2008-05-23 Controlling heating rollers in a laminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0809513A GB2456122A (en) 2008-05-23 2008-05-23 Controlling heating rollers in a laminator

Publications (2)

Publication Number Publication Date
GB0809513D0 GB0809513D0 (en) 2008-07-02
GB2456122A true GB2456122A (en) 2009-07-08

Family

ID=39616075

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0809513A Withdrawn GB2456122A (en) 2008-05-23 2008-05-23 Controlling heating rollers in a laminator

Country Status (1)

Country Link
GB (1) GB2456122A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0330929A (en) * 1989-06-28 1991-02-08 Fujipura Kk Apparatus for laminating cards
JP2000158535A (en) * 1998-11-30 2000-06-13 Fuji Photo Film Co Ltd Heating and pressurizing device with built-in heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0330929A (en) * 1989-06-28 1991-02-08 Fujipura Kk Apparatus for laminating cards
JP2000158535A (en) * 1998-11-30 2000-06-13 Fuji Photo Film Co Ltd Heating and pressurizing device with built-in heater

Also Published As

Publication number Publication date
GB0809513D0 (en) 2008-07-02

Similar Documents

Publication Publication Date Title
US7867347B2 (en) Method for controlling heating rollers and laminator using such method
US8141446B2 (en) Speed changing transmission mechanism of sheet laminating apparatus
EP2698253B1 (en) Transfer film tensioning
JP2004291374A (en) Duplex laminator
GB2456122A (en) Controlling heating rollers in a laminator
US7992617B1 (en) Sheet laminating apparatus
US6561248B2 (en) Lamination system
US20100307690A1 (en) Laminating machine
US20080236757A1 (en) Sheet laminating apparatus
US8220513B1 (en) Laminator with changeable rotation speed and heating temperature
US8136565B2 (en) Speed changing transmission mechanism of sheet laminating apparatus
US20090173447A1 (en) Sheet laminating apparatus having thickness-detecting function
US8037914B2 (en) Laminating apparatus
US6830088B2 (en) Hot laminating apparatus having heat shield
KR101497454B1 (en) Method for Manufacturing Laminated Glass with EVA
US7225847B2 (en) Laminated product automatic transporting and feeding device for laminator
JP2006220696A (en) Device for inserting optical fiber into protective tube
EP1916099B1 (en) A laminator assembly
US7066231B2 (en) Wasteless type lamination system
US8807186B1 (en) Hot laminating apparatus
JPH07214662A (en) Laminator
US20100294434A1 (en) Sheet laminating apparatus with instant heat control function
JP2004001236A (en) Laminator
KR20240076962A (en) Film laser processing equipment including precision hole processing structure
EP1964674A2 (en) Transporting conveyor for continuously laminating plural objects

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)