WO2014023053A1 - Procédé de formation d'un corps de boîte creux doté d'un élément encastré - Google Patents

Procédé de formation d'un corps de boîte creux doté d'un élément encastré Download PDF

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Publication number
WO2014023053A1
WO2014023053A1 PCT/CN2012/081100 CN2012081100W WO2014023053A1 WO 2014023053 A1 WO2014023053 A1 WO 2014023053A1 CN 2012081100 W CN2012081100 W CN 2012081100W WO 2014023053 A1 WO2014023053 A1 WO 2014023053A1
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WO
WIPO (PCT)
Prior art keywords
built
parison
mold
hollow box
template
Prior art date
Application number
PCT/CN2012/081100
Other languages
English (en)
Chinese (zh)
Inventor
王晔
高德俊
吴陆顺
苏卫东
孙岩
姜林
徐松俊
刘亮
Original Assignee
亚普汽车部件股份有限公司
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 CN 201220390416 external-priority patent/CN202846875U/zh
Priority claimed from CN201210280239.XA external-priority patent/CN102896764B/zh
Application filed by 亚普汽车部件股份有限公司 filed Critical 亚普汽车部件股份有限公司
Publication of WO2014023053A1 publication Critical patent/WO2014023053A1/fr

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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
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • 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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
    • 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
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2073—Means for feeding the inserts into the mould, preform or parison, e.g. grippers
    • B29C2049/2078—Means for feeding the inserts into the mould, preform or parison, e.g. grippers being retractable during or after blow moulding
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06905—Using combined techniques for making the preform
    • B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
    • B29C49/06914—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets using parallel sheets as a preform
    • 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
    • B29L2031/7172—Fuel tanks, jerry cans

Definitions

  • the present invention relates to a method of forming a blow molded hollow casing, and more particularly to a hollow casing blow molding method provided with a built-in assembly, which is particularly suitable for use in the manufacture of fuel tank blow molding. Background technique
  • Automotive plastic fuel tanks are widely recognized by customers for their light weight, safety performance, corrosion resistance, impact resistance, long service life and large design freedom.
  • the HDPE 6-layer coextrusion blow molding technology with EV0H fuel barrier is the mainstream technology for plastic fuel tank manufacturing today.
  • relevant policies and regulations have imposed strict requirements on automobile OEMs.
  • California has introduced PZEV, which is a zero-emission, ⁇ 20mg/24h regulation.
  • the total evaporative emissions include gasoline in the fuel tank body, welding surfaces and fittings, leaks of seals, etc., generally in the hundreds of mg / 24h, so the PZEV emission standards for plastic fuel tanks Very demanding.
  • the noise caused by fuel sloshing inside the fuel tank is more obvious when the background noise is reduced. Therefore, it is necessary to carry a large wave-proof plate structure inside the fuel tank to reduce fuel consumption.
  • the swaying noise, and the traditional wave-proof board can only enter the wave-proof board from the oil pump opening or the bottom of the parison into the tank, and the size of the wave-proof board is limited, so it requires a greater degree of process design freedom.
  • INERGY's TSBM technology uses the CORE structure to preform two blanks.
  • the internal parts of the CORE are connected to the parison of the tank inner wall by the built-in mechanism inside the CORE;
  • TI's TAPT process uses a special blow molding process to cut the pre-blow molded tank parison to obtain two parisons. The process then connects the internal parts to the inner wall of the tank to obtain a blown hollow body with built-in parts.
  • TSBM technology uses the CORE structure to carry out the preform preforming and component built-in process in a long period of time, which is not conducive to the improvement of the design freedom of the tooling, is not conducive to the quality of the Haf line molding, and does not have good visibility of the debugging process;
  • the TAPT technology needs to cut the formed fuel tank into two halves first, which is not conducive to improving the production efficiency of the fuel tank.
  • the function of the mold is complicated and the tooling cost is high. How to reduce the cost of equipment and products, improve product quality and tooling design freedom, and achieve good process visibility, minimize the leakage of hollow boxes, and can build large components such as wave boards, etc. A problem that needs to be solved. Summary of the invention
  • the invention is directed to the technical problems existing in the prior art, and provides a simple operation, lower cost, good quality, large degree of freedom in tooling design, and can realize a hollow box blowing with large built-in components compared with the prior art. Plastic molding method.
  • a hollow box forming method provided with a built-in component characterized in that the method comprises the following steps: a) feeding, the step is mainly two pieces The plasticized parisons are respectively fed into two gaps formed by the preforming template and the mold half mold;
  • the temperature adjustment device for realizing the cold water hot water switching function is disposed at the knife edge position of the mold. After the mold half mold and the preform template are closed, the temperature adjustment device is switched before the high pressure blow molding.
  • the parison is insulated by hot water, and the parison here needs to maintain a relatively high temperature, mainly to maintain the high temperature molten state of the parison and improve the final molding quality.
  • the temperature adjustment device is switched to cold water to cool the mold edge, and the main function is to ensure the shape of the product and the mechanical properties at the edge.
  • the pre-formed template is provided with a heating device.
  • the heating device heats the position of the parison that needs to be connected to the built-in component, and the heating temperature is controlled at 130-170 degrees Celsius.
  • the thermal device can be a contact heating device or a non-contact heating device, wherein the contact heating device is a hot plate heating component, and the non-contact heating device is an infrared heating component.
  • the shape of the fuel tank has been basically formed.
  • the heating device on the pre-formed template is driven by the cylinder, the cylinder or the motor, or is close to the position where the parison of the built-in component needs to be connected.
  • the parison is heated, preferably at a temperature of 150-160 Celsius, the main role is to ensure the consistency of the parison temperature, improve the stability of product quality, the temperature is too high or too low will lead to inconsistency of the parison temperature, which in turn affects the quality of the whole product.
  • the blank is cut by a cutting member provided on the sheet forming device to realize the cutting and fixing of the parison.
  • the main function of the cutting device is to realize the upper and lower division of the parison to meet the needs of continuous production of the fuel tank.
  • the cutting member can be provided with a temperature control switch, and in addition, in order to prevent the cutting member from sticking to the parison, in cutting A coating is provided on the device to prevent bonding to the preform material HDPE, such as a Teflon coating or other fluorinated hydrocarbon; wherein the cutting member is a cutter or other splitter having a cutting action.
  • the built-in component fixing step is that, in the step, the robot arm fixedly mounted on the main body moves the clamped component to be built into the position between the molds, and the robot
  • the arm has a pushing device such as a cylinder, a cylinder or a motor for connecting the built-in parts with the parison inside the mold cavity.
  • This connection can be one of welding, welding or riveting. Or the welding process generally requires a hot plate or infrared preheating before the connection to better achieve the connection performance.
  • the preforming template is provided with a parison fixing device, in the breaking and fixing step of the parison blank, after the parison is broken, the parison is fixed to the mold by the parison fixing device.
  • a parison fixing device in the breaking and fixing step of the parison blank, after the parison is broken, the parison is fixed to the mold by the parison fixing device.
  • the main machine leaves the die cutting position, and the upper part of the pre-formed template device has a parison fixing device, and the movement of the baffle is pushed by the cylinder, the oil cylinder or the motor to push the upper part of the parison after the material is broken to Upper part of the mold and assist certain
  • the pressure acts to fix the upper part of the parison on the upper surface of the mold to prevent the upper part of the parison from falling off in the subsequent step, which has an impact on the overall quality of the molding.
  • the pre-formed template is provided with an air blowing device, the air blowing device is a diffusing air blowing head, and the air blowing head is configured as a porous hollow ball structure, and the structure can be realized to each Uniform blowing in the direction ensures that the position of the parison in all directions in the preforming process is evenly applied to the inner wall of the cavity.
  • This structure is different from the conventional piercing needle blowing.
  • the air blowing method pushes two parisons under the high pressure blowing to the surface of the mold cavity to realize the initial molding of the upper and lower casings of the oil tank, and the process is often completed within a few seconds, and the fuel tank casing of the process is basically formed.
  • the shape of the fuel tank body is realized; the air blowing mode can obviously improve the production efficiency, can form a better shape of the Haf line, and further ensure the product quality.
  • the pre-formed template is further provided with a sealing device for sealing between the mold, the parison and the pre-formed template, not only preventing the leakage of the high-pressure blow air from being insufficiently formed, but also preventing The exchange of heat with the outside causes a rapid decrease in the temperature of the parison, thereby realizing the parison preforming function in the step;
  • the sealing device is a sealing strip.
  • the sealing strip may be made of organic or inorganic materials having a certain strength, such as polytetrafluoroethylene or magnesium aluminum alloy. For the purpose of thermal conductivity and weight reduction, a better choice is a lightweight material of magnesium alloy.
  • the flash parison outside the knife edge is squeezed to seal the mold, the preform template and the parison during the preforming, so that no leakage occurs under the action of the pre-blowing pressure, because once the air leak occurs
  • the present invention has the following advantages.
  • contact heating can generally be understood as the heating plate heating method
  • non-contact heating can generally be understood as infrared heating mode.
  • the parison preforming stage after the two parisons are broken, the parison is fixed on the upper surface of the mold by the parison fixing device, and the upper flash is prevented from being smashed after the preform is preformed, so that the mold is prevented from being second. When it is closed, the quality of the product is insufficient, and the quality of the sludge at the edge is formed.
  • the preforming stencil device has a sealing strip on the outer side of the corresponding knife edge to seal the mold, the preform stencil and the parison during preforming, so that no air leakage occurs under the action of the pre-blowing pressure.
  • the whole of the pre-formed stencil device has a heating function, and the pre-formed stencil device is heated by an external mold temperature machine, and the temperature is generally maintained at 80 degrees Celsius or more to prevent the parison at the knife edge position from being cooled too quickly during the pre-forming process. It is not conducive to the improvement of the quality of the knife edge when the final mold is closed.
  • the invention provides a method for blow molding a two-piece plasticized parison hollow body, which realizes the connection between the built-in component and the inner wall of the oil tank, and reduces the opening of the fuel tank compared with the conventional perforated welding, such as a boring joint or a joint.
  • the invention also improves the molding quality and product yield of the product by using the pre-formed template device, so that the opening on the container wall is minimized, and an effective molding method is provided for realizing low leakage of the molded hollow box.
  • Figure 1 is a schematic view of the feeding state
  • Figure 2 is a schematic view showing the first closure of the mold half mold and the preformed template
  • Figure 3 is a schematic view showing the exit state of the preformed template
  • Figure 4 is a schematic diagram of the fixing of the built-in components
  • Figure 5 is a schematic diagram of the secondary closure of the mold half mold and the preformed template
  • Figure 6 is a schematic view showing the state in which the mold half mold is opened and ready to enter the next cycle
  • Figure 7 is a schematic view showing the structure of the formed fuel tank.
  • 1 is a parison
  • 2 is a mold half mold
  • 3 is a pre-formed template
  • 4 is a heating device
  • 5 is a robot arm
  • 6 is a parison fixing device
  • 7 is a blowing device
  • 8 is a sealing strip
  • 9 is The power unit
  • 10 is the base
  • 11 is the temperature adjustment device
  • 12 is the heating device
  • 13 is the fuel tank.
  • a hollow box forming method provided with built-in components comprising the following steps:
  • a) feeding step the preform template 3 and the mold half mold 2 are placed on the base 10 by the power unit 9, and when the two plasticized parisons start to be unloaded, the preform template and the mold half mold move. Below the parison 1, two plasticized parisons 1 are subsequently fed into the two gaps formed by the preformed stencil 3 and the mold halves 2, respectively.
  • the mold half mold 2 and the pre-formed template 3 are closed; the temperature adjustment device 11 for realizing the cold water hot water switching function is provided at the knife edge position of the mold, and after the mold half mold 2 and the preform template 3 are closed, the high pressure Prior to blow molding, the temperature regulating device heats the parison by switching to hot water, where the parison needs to maintain a relatively high temperature, mainly to improve the final molding quality.
  • the temperature regulating device heats the parison by switching to hot water, where the parison needs to maintain a relatively high temperature, mainly to improve the final molding quality.
  • high pressure blow molding the parison 1 sandwiched between the mold half mold 2 and the pre-formed template 3 is passed through the air blowing device 7 carried on the pre-formed template and/or the vacuum suction on the mold is attached to the mold half mold 2 blow molding preforms.
  • the cutting member After the high-pressure blow molding is completed, the blank is cut by the cutting member provided on the sheet forming device to realize the cutting and fixing of the parison.
  • the main function of the cutting device is to realize the upper and lower division of the parison to meet the needs of continuous production of the fuel tank.
  • the cutting member can be provided with a temperature control switch, and in addition, in order to prevent the cutting member from sticking to the parison, in cutting On the device
  • a coating is provided to prevent adhesion to the parison material HDPE, such as a Teflon coating or other fluorinated hydrocarbon; wherein the cutting member is a cutter or other cutting device having a cutting action.
  • the preform template is provided with a parison fixing device 6, in which the parison of the parison is cut and fixed, and after the parison is broken, the parison is fixed to the upper portion of the mold by the parison fixing device 6.
  • the parison fixing device 6 of the upper part of the pre-formed template device pushes the baffle by the cylinder, the oil cylinder or the motor to push the upper part of the parison after the material is broken.
  • the upper part of the parison is fixed on the upper surface of the mold to prevent the upper part of the parison from falling off in the subsequent step, which has an impact on the overall quality of the molding.
  • the pre-formed form is provided with a heating device 4, after the high-pressure blow molding is completed, the heating device heats the position of the parison to be connected to the built-in component, and the heating temperature is controlled at 130-170 degrees Celsius
  • the heating device is a contact heating device or a non-contact heating device, wherein the contact heating device is a hot plate heating component, and the non-contact heating device is an infrared heating component.
  • the shape of the fuel tank is basically formed, and the heating device 4 on the pre-formed template is contacted by the cylinder, the cylinder or the motor, or is close to the position where the parison of the built-in component needs to be connected,
  • the parison is heated at a temperature of 150-160 degrees Celsius.
  • the main function is to ensure the consistency of the parison temperature and improve the stability of the product quality. If the temperature is too high or too low, the temperature of the parison will be inconsistent, which will affect the influence. The quality of the entire product. Referring to Fig.
  • the mold half mold 2 is opened, and the pre-formed template 3 is ejected from the mold half mold by the power unit; during the mold opening and the pre-form template exit, the mold vacuum and the preforming template device are passed through the mold After the action, the parison is close to the mold cavity, and the preforming template device is smoothly realized.
  • the mold half 2 and its parison 1 are separated and exit the position between the mold halves.
  • the built-in component fixing step is, in this step, the robot arm 5 fixedly mounted on the main body moves the clamped component to be built between the mold half mold 2 and needs to be built in
  • the robot arm 5 is provided with a pushing device such as a cylinder, a cylinder or a motor for connecting the built-in parts with the parison inside the mold cavity, and the connection may be one of welding, welding or riveting.
  • a welding or welding process it is generally required to perform hot plate or infrared preheating before, in order to better achieve the connection performance.
  • the mold is closed twice; after the mold is closed twice, the temperature adjustment device is immediately switched to cold water to cool the mold edge, and the main function is to ensure the shape of the product and the mechanical properties at the edge.
  • the position of the die edge is cooled, and the blow molding forms a hollow box; in the second closing of the mold and the final blow molding step, the robot arm 5 realizes the connection of the built-in component to the inner wall of the fuel tank, and then returns to the initial position, ready to be clamped. Another set of built-in components goes into the next cycle. Close the mold half mold 2 and the preformed parison.
  • the hot water inside the water channel at the mold edge is switched to cold water, and the cooling is performed at the knife edge when the mold is closed to ensure the shape of the product and the mechanical properties at the edge, and finally the assembly will be provided.
  • the pre-formed blank blow-molded plastic hollow box body see FIG. 7, the robot arm 5 holding device in the process is further provided with an image capturing device, which can shoot the welding surface of the parts connected to the inner wall and pass the image
  • the identification monitors the connection position and shape to prevent the difference in product performance caused by poorly connected parts, and further ensures product quality.
  • Example 2 The air blowing device is set to have a diffusing air blowing head, and the air blowing head is set to be more
  • the hollow hollow ball structure can uniformly blow air in all directions to ensure uniform position of the parison in all directions to the inner wall of the cavity during the preforming process. After the mold, the preforming template device and the parison are closed, the air is blown through the air blowing head on the pre-formed template, and the air holes on the mold also need to open the vacuum suction blank to assist the molding function, and in the subsequent process.
  • the utility model is used for adsorbing the parison to prevent falling off from the cavity.
  • the structure is different from the traditional piercing needle blowing, which pushes the two parisons under the high pressure blowing to the surface of the mold cavity to realize the fuel tank.
  • the initial molding of the upper and lower casings is often completed in a few seconds.
  • the formation of the fuel tank casing of the process basically realizes the shape of the fuel tank body; the blowing method can significantly improve the production efficiency and can form a better haf The shape of the line, the further improvement of the product quality.
  • Embodiment 3 The pre-formed template 2 is further provided with a sealing device for sealing between the mold, the parison and the pre-formed template, not only preventing the leakage of the high-pressure blown air from being insufficiently formed, but also preventing heat exchange with the outside world.
  • the sealing device can be provided as a sealing strip 8, and the sealing strip can be made of organic or inorganic material having a certain strength, for example, poly four. Fluoroethylene or magnesium alloy, etc., for the thermal conductivity and weight reduction requirements, a better choice is the lightweight material of magnesium alloy.
  • the flash parison outside the knife edge is squeezed to seal the mold, the preform template and the parison during the preforming, so that no leakage occurs under the action of the pre-blowing pressure, because once the air leak occurs It is easy to cause insufficient molding of the parison and cause heat exchange between the inside and the outside, which leads to excessive cooling and crystallization and hardening of the parison, resulting in the quality of the inner part of the later part connected to the inside of the parison and the poor fusion quality at the edge, thus affecting the whole product.
  • Embodiment 4 In order to improve the efficiency of the production process, in the preform pre-blowing molding process, the built-in components may be heated by the heating device 12, and the preheating operation may be performed at any time when the built-in components are fixed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de formation d'un corps de boîte creux doté d'un élément encastré comprenant les étapes suivantes : a) l'introduction, selon laquelle deux paraisons de plastification en forme de feuilles sont respectivement posées en dehors de deux espaces formés par un modèle préformé et un demi-moule ; b) la fermeture du demi-moule et du modèle préformé ; c) la réalisation d'un moulage par soufflage sous haute pression ; d) la fracturation et la fixation de la paraison en forme de feuille ; e) le préchauffage de la paraison raccordée à l'élément encastré ; f) l'ouverture d'un moule et le retrait du modèle préformé ; g) la fixation de l'élément encastré ; h) la réalisation d'une fermeture secondaire sur le moule ; i) le refroidissement d'une position de lame du moule et la réalisation d'un moulage par soufflage sous haute pression pour former le corps de boîte creux.
PCT/CN2012/081100 2012-08-08 2012-09-07 Procédé de formation d'un corps de boîte creux doté d'un élément encastré WO2014023053A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201210280239.X 2012-08-08
CN 201220390416 CN202846875U (zh) 2012-08-08 2012-08-08 一种预成型模板装置
CN201210280239.XA CN102896764B (zh) 2012-08-08 2012-08-08 一种设置有内置组件的中空箱体成型方法
CN201220390416.5 2012-08-08

Publications (1)

Publication Number Publication Date
WO2014023053A1 true WO2014023053A1 (fr) 2014-02-13

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CN107819089A (zh) * 2017-11-20 2018-03-20 福建省石狮市通达电器有限公司 一种3d电池盖的制作工艺及其成型设备
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CN101489759A (zh) * 2006-07-07 2009-07-22 考特克斯·特克斯罗恩有限公司及两合公司 用于由热塑性塑料制造内侧带有嵌入件的空心体的成形工具
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CN107819089A (zh) * 2017-11-20 2018-03-20 福建省石狮市通达电器有限公司 一种3d电池盖的制作工艺及其成型设备
CN107819089B (zh) * 2017-11-20 2023-06-09 福建省石狮市通达电器有限公司 一种3d电池盖的制作工艺及其成型设备

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