WO2009086749A1 - 一步法、单工位注、吹塑料中空容器成型产品的模具及其应用 - Google Patents

一步法、单工位注、吹塑料中空容器成型产品的模具及其应用 Download PDF

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Publication number
WO2009086749A1
WO2009086749A1 PCT/CN2008/071292 CN2008071292W WO2009086749A1 WO 2009086749 A1 WO2009086749 A1 WO 2009086749A1 CN 2008071292 W CN2008071292 W CN 2008071292W WO 2009086749 A1 WO2009086749 A1 WO 2009086749A1
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WIPO (PCT)
Prior art keywords
mold
molding
blow
injection
blow molding
Prior art date
Application number
PCT/CN2008/071292
Other languages
English (en)
French (fr)
Inventor
Jin Qiang Huang
Original Assignee
Taishan Xinhua Official Physic Package Co., 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 Taishan Xinhua Official Physic Package Co., Ltd. filed Critical Taishan Xinhua Official Physic Package Co., Ltd.
Priority to CA2695927A priority Critical patent/CA2695927C/en
Priority to BRPI0816423-1A2A priority patent/BRPI0816423A2/pt
Publication of WO2009086749A1 publication Critical patent/WO2009086749A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B29C49/061—Injection blow-moulding with parison holding means displaceable between injection and blow stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/56—Opening, closing or clamping means
    • 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
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C49/06—Injection 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
    • B29C49/06—Injection blow-moulding
    • B29C49/0665—Injection blow-moulding the injection mould cavity and the blow-mould cavity being displaceable to the geometrically fixed injection core mould

Definitions

  • the invention belongs to the technical field of plastic processing, and particularly relates to a special mold for molding a blow molding plastic hollow container molding product by using a set of molds on an injection molding machine at one time, and is mainly applied to a common injection molding machine.
  • the invention also relates to the use of a single-station single-station and core fixing on a common injection molding machine in plastic processing, the blow molding core and the parison are not rotated or translated during the blow molding process, and one injection molding of a blow molding plastic hollow is completed at one time.
  • the method for molding a container is mainly applied to a single-station and fixed-core double-row and one-shot injection molding hollow mold molding die on a common injection molding machine.
  • the hollow product produced by the extrusion-blow molding method has an unremovable protruding crevice on the surface of the product, so that the surface of the product is not beautiful and smooth. Moreover, unnecessary scraps are inevitable, which increases the cost of product molding and waste of raw materials. For these reasons, a two-pronged method of blowing a blow molded product has been developed. The method comprises the following steps: injection molding a parison on an injection molding machine, and then heating the parison on the blow molding machine to inflate into a hollow container product.
  • the equipment for blowing a hollow container is a special equipment for injection and blowing.
  • the production and processing cycle is long, the cost is high, the equipment investment is large, the process is complicated, and the mold processing is difficult and difficult to master; Moving the rotary core, the product parison is poorly centered, and it is easy to produce quality problems with uneven wall thickness.
  • the system configuration is high and the adaptability is poor.
  • the mandrel is not good in neutrality during blow molding, and the thickness of the blown hollow container is not uniform, and the product quality is not easy to ensure.
  • the invention patent (application number 200410002642.1) and the utility model patent (patent number ZL 01255074.4) are mainly applicable to the two-station one-way horizontal translation type mold.
  • the mandrel and the blown parison are translated together to the blow mold of the injection molding machine mold to form a blow molding product.
  • This method is difficult to control the production process, the mold structure is not compact, the positioning is poor, the neutrality is not good, and the product quality is not easy to guarantee.
  • the object of the present invention is to provide a mold for injection molding and blow molding a plastic product at a time on a conventional injection molding machine in view of the above-mentioned deficiencies of the prior art.
  • Another object of the present invention is to provide a method for molding a blow molded plastic hollow container molded product at a time by using a single-station single-station, core-fixing, core-free rotation or no translation on a conventional injection molding machine.
  • Technical solution adopted by the invention is to provide a method for molding a blow molded plastic hollow container molded product at a time by using a single-station single-station, core-fixing, core-free rotation or no translation on a conventional injection molding machine.
  • a first aspect of the present invention provides a mold for a one-shot, single-station injection, blown plastic hollow container molded product, which comprises an injection mold assembly and a blow mold assembly; a movable mold and a fixed mold which are arranged horizontally in parallel, and the movable mold is controlled by the first group of driving mechanisms to open and close with the fixed mold; the fixed mold is provided with at least one row of longitudinally arranged preform cavity, and at least a fixed mold is fixed on the movable mold.
  • a row of longitudinally arranged mandrels with blowing ports correspond one-to-one with the preform cavity on the fixed mold; each row of mandrels is arranged with a blow molding module, and each of the blow molding modules comprises two blowing
  • the molding modules are respectively located on the front and rear sides of the above-mentioned core rod, and the inner side of each template is provided with at least one row of finished mold guns, one-to-one correspondence with each core rod, and the opening and closing of the two blow molding modules is performed by the third Drive mechanism control.
  • the mold of the present invention can be directly mounted on a common injection molding machine. After the injection molding is completed, the injection mold is opened, and then the mold is blown and blow molded.
  • the above fixed mold comprises a sprue bush, a hot runner, a preform cavity plate; the hot runner is a split open flow channel; a row of longitudinally arranged bottles is arranged on each of the raised preform cavity plates In the embryo cavity, a flow injection port is arranged at the bottom of the preform cavity.
  • the inner side surface of the movable mold is provided with a push plate movable horizontally to the left and right, the core rod runs through the push plate, and the outer side of the push plate supports the blow mold, and the movement of the push plate is controlled by the second drive mechanism.
  • the mandrel has a cavity inside, the bottom of the cavity is communicated with the cylinder disposed on the air inlet plate, and the top of the cavity is provided with a gas outlet.
  • a core with a spring is disposed inside the cavity. The rod controls the opening and closing of the air outlet.
  • a second aspect of the present invention provides a blow molding plastic hollow container molding product which is formed by one-shot single-station, core fixing, core rotation without rotation or non-translation on a common injection molding machine.
  • the method is mainly applied to a single-station and fixed-core multi-row one-shot injection blow molding hollow container molding die on a common injection molding machine.
  • the method is to install a pair of molds for direct injection and blowing of plastic hollow container molding products on a common injection molding machine, according to two processing stages of injection molding and blow molding;
  • the injection molding stage includes: mold closing, injection molding, mold opening; blow molding stage These include: Blow molding module closure, blow molding, opening of the blow molding module and molding of the hollow container.
  • the invention is characterized in that: in the injection molding stage and the blowing stage, after the mold is opened, the forming mandrel is always fixed in the moving mold, and no power mechanism is required to drive rotation or translation; the injection molding blank adheres to the mandrel, and the mold is completely opened. Afterwards, the blow molding modules on both sides of the core are closed by the push rod. When the blow molding module is completely closed, the inside of the core rod is blown to complete the blow molding of the hollow container.
  • the closing, blow molding and opening and ejection of the blow molding module in the blow molding stage are all performed on the same mold.
  • the opening of the mold according to the present invention means that the core rod always follows the moving template to open and move, and the position is unchanged, and the parison blank adheres to the core rod.
  • the mandrel does not require a power mechanism to drive rotation or translation.
  • the blow molding module of the present invention is closed, which means that the blow molding module is disposed on both sides of the mandrel, and the blow molding module is directly closed by the third driving structure (for example, a cylinder or other driving device), and the blow molding module is started and closed.
  • the center of the blow molded module is coaxial with the mandrel with the parison.
  • the mandrel can be arranged in a single row or in multiple rows, and the injection molding of the hollow container can be carried out in one mold and multiple chambers.
  • Blow molding parison, blow mold and moving mold are integrated, and the blow molding module is installed on the movable mold core.
  • the movable mold of the injection mold is retracted together with the blown parison and the blow mold, and the core and the blown parison are always fixed on the movable mold, and no power is required.
  • the mechanism drives rotation or translation.
  • the blow molding module is directly closed and blow molded. This mold is one-time blow molding of the hollow plastic product once on the ordinary injection molding machine.
  • the core and the injection molded parison are always in the same position on the movable mold, the core is good in neutrality, the mold is compact in structure, easy to install, simple in operation and maintenance, from the parison to the finished product, the product surface is free of cracks, and the product quality is more Easy to guarantee.
  • the invention has the following advantages: 1. Directly using an ordinary injection molding machine, overcoming the disadvantages of the production process of the two-way method and the two-station method, and the disadvantage of large equipment investment; 2. The degree of production automation and production efficiency are high; 3, the mold is compact, easy to install, easy to operate, and easy to maintain; 4, from the parison to the finished product, the neutrality is good, the product surface is not cracked, the product quality is easier to guarantee.
  • 1A is a schematic view showing the installation of the present invention on a general injection molding machine
  • Figure 1B is a plan view of Figure 1A;
  • FIG. 2A is a schematic structural view of a mold according to the present invention.
  • Figure 2B is a plan view of Figure 2A;
  • Figure 2C is a partial enlarged view of Figure 2B;
  • 3A is a schematic structural view of the mold of the present invention after the first clamping
  • Figure 3B is a plan view of Figure 3A;
  • FIG. 4A is a schematic structural view of the mold of the present invention after the first mold opening
  • Figure 5B is a plan view of Figure 5A
  • Figure 6A is a schematic view showing the structure of performing blow molding
  • Figure 6B is a plan view of Figure 6A
  • FIG. 7A is a schematic structural view of the mold of the present invention after the second mold opening
  • Figure 7B is a plan view of Figure 7A
  • FIG. 8A is a schematic structural view showing an action state of the push plate according to the present invention.
  • Fig. 8B is a plan view of Fig. 8A.
  • the present invention includes an injection mold assembly and a blow mold assembly.
  • the injection mold assembly includes a movable mold 1 and a fixed mold 2 which are disposed in the left and right direction.
  • the movable mold 1 is controlled by a group of driving mechanisms to move left and right in the horizontal direction so as to be able to open and close with the fixed mold 2.
  • the fixed mold 2 includes a sprue bush 203, a hot runner 204, and a preform cavity plate 205.
  • the hot runner 204 is an evenly divided open runner.
  • a row of longitudinally arranged preform cavities 201 is disposed on each of the raised preform cavity plates 202 disposed on the stationary mold 2, and a flow port injection port is provided at the bottom of the preform cavity 201.
  • the fixed mold is fixedly connected to the fixed injection end 302 of the ordinary injection molding machine.
  • the preform cavity plate is convex in shape to facilitate the molding, and the blow molding module on the movable mold described below is embedded on both sides of the preform cavity plate.
  • the movable mold 1 is fixed with two rows of mandrels 101 with blowing ports, corresponding to the preform cavity 201 on the fixed mold 2.
  • the movable mold 1 is composed of an air intake plate assembly, a base plate 103 and a push plate 102.
  • the push plate 102 is disposed on a side of the base plate 103 opposite to the fixed mold, and is controlled by the second group of drive mechanisms to be horizontal with respect to the substrate 103.
  • the direction is shifted left and right for pushing the finished product, and the mandrel 101 is set at the base On the plate 103, and through the push plate 102.
  • the inside of the mandrel 101 has a cavity 1011.
  • the bottom of the cavity communicates with the gas 1011 disposed on the air inlet plate 6.
  • the top of the cavity is provided with a gas outlet 1013. Further, a cavity is provided inside the cavity 1011.
  • the core rod 1014 of the spring 1015 controls the opening and closing of the air outlet 1013.
  • the outer side of the push plate 102 that is, the side opposite to the fixed mold, is fixed with a blow mold unit 4.
  • Each row of mandrels is provided with a blow mold assembly 4, which is composed of two blow molding modules 401, 402, which are respectively located on the left and right sides of each of the core rods 101 on the movable mold 1, by
  • the three sets of hydraulic drive mechanisms 5 control the two to move back and forth in the horizontal direction (i.e., perpendicular to the direction in which the movable mold moves horizontally left and right), thereby realizing the opening and closing of the two modules 401, 402.
  • the mandrel 101 since the mandrel 101 has two rows, two sets of blow mold assemblies are provided correspondingly.
  • the inner side of each of the modules 401, 402 of the blow mold assembly is provided with a row of forming cavities 403 corresponding to each of the mandrels 101.
  • the left side of the movable mold 1 is connected to the air intake plate assembly 6.
  • Processing methods include injection molding and blow molding.
  • the injection molding phase consists of the following processes: Injection molding, mold injection, and mold opening;
  • the blow molding stage consists of the following processes: blow mold closure, blow molding, blow mold opening, plasticizing and product ejection.
  • the moving mold moves, and the core rod moves together.
  • the core rod is always fixed in the moving mold, and the injection blank is adhered to the core rod.
  • the blow molding module is pushed in the cylinder.
  • the push rod closes the blow molding module.
  • the blow molding module is completely closed, the inside of the mandrel is pushed by the cylinder while blowing, and the blow molding of the hollow container is completed by the blow molding module.
  • the molded article is ejected by the push plate, and then the injection molding machine starts the next injection molding and blow molding cycle.
  • the process is in the injection molding stage, the mold is closed, and the preform is injection molded. After the mold is opened, it enters the blow molding stage.
  • the blow molding module is closed, and the blow molded hollow container is opened.
  • the blow molding module and the molded hollow container are ejected.
  • the technical feature is that in the injection molding stage and the blow molding stage, after the mold is opened, the forming mandrel is always fixed in the moving mold and does not move, the injection blank adheres to the core rod, and after the mold is completely opened, the blow molding module is closed and starts to be executed. After the blow molding module is completely closed, the inside of the mandrel is stretched and blown, and the blow molding of the hollow container is completed. In the injection molding stage, only the injection blank is formed between the injection and the mold opening, and there is no need to maintain and cool the mold, and the injection molding machine is in the mold clamping state. The closing of the blow molding module in the blow molding stage, the blow molding and the opening and ejection are all performed on the same mold.
  • the injection molding stage includes: injection mold closing: the movable mold 1 is advanced from the left and right to the fixed mold 2, and the mandrel 101 is inserted into the preform cavity 201, and the preform cavity is outside the mandrel.
  • the mold is opened: the movable mold 1 is horizontally shifted to the left, and separated from the fixed mold 2 to complete the injection molding.
  • the blow molding stage includes: under the driving of the third drive mechanism 5 (hydraulic mechanism), the two blow molding modules 401 and 402 of the blow mold are closed, and the front and rear modules are molded.
  • the cavity 403 is closed to collectively surround each of the mandrels 101 at the center.
  • the air blower unit 6 is blown toward the inside of the mandrel 101, and the billet 7 on the outer surface thereof is expanded to fill the space surrounded by the left and right molding cavities 403 to form a molded article 8.
  • the push plate 102 is translated to the right to eject the molded article 8, and the molded product 8 is dropped from the gap between the movable mold 1 and the static mold 2 and collected.
  • the defects of the two-step method and the two-station method can be overcome, and the equipment investment is large, the mold structure is compact, the installation is easy, the operation and maintenance are simple, the parison to the product are completed, and the neutrality is achieved. Well, there is no seam on the surface of the product, and the product quality is easier to guarantee, which greatly improves the automation and production efficiency.

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

Description

一步法、 单工位注、 吹塑料中空容器成型产品的模具及其应用
本发明所属技术领域
本发明属于塑料加工技术领域， 具体涉及在注塑机上用一套模具一次 完成注塑一一吹塑塑料中空容器成型产品的专用模具， 主要应用在普通注 塑机上。
本发明还涉及在塑料加工中， 在普通注塑机上用一歩法单工位、 型芯 固定， 吹塑型芯和型坯在吹塑过程不旋转或不平移， 一次完成注塑一吹塑 塑料中空容器成型产品的方法， 主要应用在普通注塑机上的单工位和固定 型芯的双排一歩法注吹中空容器成型模具中。
本发明之前的现有技术
在塑料的吹塑中空产品成型加工过程中， 主要采用 "挤一吹"和 "注 一吹"两种工艺。 采用挤出一吹塑成型方法生产出来的中空产品， 在产品 表面上出现不可消除的凸出夹缝， 使产品表面不美观， 光滑。 而且不可避 免出现多余的边角料， 增大产品成型的成本和原料的浪费。 由于这些原因， 开发了一种两歩法注一一吹中空成型吹塑产品的方法。 其方法是先在注塑 机上注塑出型坯， 再转到吹塑机上加热型坯再吹胀成中空容器产品， 在这 种两歩法加工方法中， 生产环节多， 设备投资大， 成型工艺复杂， 容易产 生型坯污染。 最近， 为了克服以上缺点， 开发了一种 "三工位一歩法注吹" 生产塑料中空容器的成型方法 （专利号 ZL95235116.1 ; 专利申请号 92208083.6 ) , 三工位一歩法注吹是 "注塑、 吹塑"在同一台机器上完成。 三工位"注吹"中空容器瓶的注吹机是三个工位以 120度成等边三角形分布， 第一工位为注射成型工位， 第二工位为吹塑成型工位， 第三工位为脱瓶工 位。 三个工位可同时运行， 缺点是： 注一吹中空容器的设备是注一吹专用 设备， 生产加工周期长， 费用高， 设备投资大， 工艺复杂， 模具加工难度 大， 不易掌握； 由于采用移动旋转式型芯， 产品型坯对中定型较差， 容易 产生产品壁厚不均匀的质量问题， 系统配置要求高， 适应性较差。
鉴于上述注吹中空制品专用设备存在的一些不足， 开发了一种 "二工 位一歩法注吹"塑料中空容器成型方法 （发明专利申请号 200610096985. 8 和 200510094402. 3和实用新型专利 ZL 200620067438. 2 ) ， 其方法是在普 通注塑机上直接安装一套模具， 模具上设置注吹塑模， 其动模设置成型芯 棒， 当芯棒注塑型坯后， 由转轴带动转动 90 ° 或 180 ° 再进行吹塑成型中 空制品。 这种方法在吹塑定位时芯棒对中性不好， 吹塑中空容器的厚度不 均匀， 产品质量不容易保证。 发明专利 （申请号 200410002642.1 ) 和实用 新型专利 （专利号 ZL 01255074.4 ) , 它主要适用于二工位一歩法卧式平移 式模具中。 这种方法是注塑的吹塑型坯在注塑模具注塑成型开模后， 芯棒 和吹塑型坯一起平移到注塑机模具的吹塑模具上才进行吹塑形成产品。 这 种方法生产工艺控制困难， 模具结构不紧凑， 定位差， 对中性不好， 产品 质量不容易保证。
发明目的
本发明的目的是针对上述现有技术的不足之处， 提供一种可在普通注 塑机上一次完成注塑、 吹塑成型塑料产品的模具。
本发明的另一目的是提供一种在普通注塑机上用一歩法单工位、 型芯 固定， 型芯不旋转或不平移， 一次完成注塑一吹塑塑料中空容器成型产品 的方法。 本发明采用的技术方案
为达到上述目的， 本发明的第一方面是提供一种一歩法、 单工位注、 吹塑料中空容器成型产品的模具， 其包括注塑模组件和吹塑模组件； 注塑 模组件包括水平左右平行设置的动模和定模， 动模由第一组驱动机构控制 其与定模的开合； 定模上设置有至少一排纵向排列的瓶胚模腔， 动模上固 定有至少一排纵向排列的带有吹气口的芯棒， 与定模上的瓶胚模腔一一对 应； 每排芯棒的配置一吹塑模组件， 每个吹塑模组件包括两块吹塑成型模 块， 分别位于上述芯棒的前后两侧， 每一模板的内侧面设置有至少一排成 品模枪， 与每个芯棒一一对应， 及两吹塑成型模块的开合由第三驱动机构 控制。
本发明所述的模具可以直接安装在普通注塑机上， 在注塑模完成吹塑 型坯注塑后， 注塑模打开， 进而吹塑模合模， 进行吹塑成型。
上述的定模包括浇口套， 热流道， 瓶胚模腔板； 热流道是均分开放式 流道； 在所述的每块凸起的瓶胚模腔板上设置一排纵向排列的瓶胚模腔， 瓶胚模腔底部设置有流道注塑口。
上述的动模的内侧面设有一可水平方向左右移动的推板， 芯棒贯穿该 推板， 及推板外侧面支承吹塑模， 该推板的移动由第二驱动机构控制。
上述的芯棒内部有一个空腔， 空腔的底部与设置在进气板上的气缸相 通， 而空腔的顶部设置出气口， 此外， 在空腔内部还设置有一条压有一弹 簧的模芯杆控制出气口的开闭。
本发明的第二方面是提供一种在普通注塑机上用一歩法单工位、 型芯 固定， 型芯不旋转或不平移， 一次完成注塑一吹塑塑料中空容器成型产品 的方法， 主要应用在普通注塑机上的单工位和固定型芯的多排一歩法注吹 中空容器成型模具中。
其方法是在普通注塑机上， 安装一副直接注、 吹塑料中空容器成型产 品的模具， 按照注塑， 吹塑两个加工阶段进行； 注塑阶段包括： 模具闭合， 注塑， 模具开启； 吹塑阶段包括： 吹塑成型模块闭合， 吹气成型， 开启吹 塑成型模块和成型中空容器顶出。 其特征在于： 所述的注塑阶段与吹塑阶 段中， 模具开启后， 成型芯棒始终固定在动模中， 不需要动力机构驱动旋 转或平移； 注射成型坯料黏附在芯棒上， 模具完全开启后， 型芯两侧的吹 塑成型模块在推杆的作用下闭合， 当吹塑模块完全闭合后， 芯棒内部吹气， 完成中空容器的吹塑成型。
所述的注塑阶段在注射与开模之间， 只有注射坯料成型， 无需保压和 冷却定型， 此时注塑机处于合模状态。
所述吹塑阶段的吹塑成型模块的闭合， 吹气成型和开启顶出均在同一 个模具上完成。
本发明所述的模具开启， 是指芯棒始终跟随动模板开启移动而且位置 不变， 型坯坯料黏附在芯棒上。 芯棒不需要动力机构驱动旋转或平移。
本发明所述的吹塑成型模块闭合， 是指吹塑成型模块设置在芯棒两侧， 直接由第三驱动结构 （例如， 油缸或其它驱动装置） 驱动推杆使吹塑成型 模块启动闭合， 吹塑成型模块的中心与带有型坯的芯棒同轴。
本发明所述的模具， 其芯棒可为单排或多排排列， 可一模多腔进行中 空容器的注吹成型。
吹塑型坯、 吹塑模具与动模为一体， 吹塑成型模块安装在动模型芯的 两侧， 在注塑模具完成吹塑型坯的注塑后， 注塑模具的动模与吹塑型坯、 吹塑模具一起后退打开， 型芯和吹塑型坯在动模上始终固定， 不需要动力 机构驱动旋转或平移。 然后吹塑成型模块直接合模， 进行吹塑成型， 这种 模具是在普通注塑机上一次完成中空塑料产品的注塑一一吹塑成型。 由于 型芯与注塑型坯在动模上始终位置不变， 型芯对中性好， 模具结构紧凑， 安装容易， 操作维修简单， 从型坯到制品一歩完成， 产品表面无夹缝， 产 品质量更容易保证。
本发明与现有技术比较具有以下优点： 1、 直接使用普通注塑机， 克服 二歩法和二工位方法的生产工艺环节多， 设备投资大的缺点； 2、 生产自动 化程度和生产效率高； 3、 模具结构紧凑， 安装容易， 操作， 维修简单； 4、 从型坯到制品一歩完成， 对中性好， 产品表面无夹缝， 产品质量更容易保 证。
附图说明
图 1A是本发明在普通注塑机上的安装示意图；
图 1B是图 1A的俯视图；
图 2A为本发明所叙模具的结构示意图；
图 2B为图 2A的俯视图；
图 2C为图 2B的局部放大图；
图 3A是本发明所述模具第一次合模后的结构示意图；
图 3B为图 3A的俯视图；
图 4A是本发明所述模具第一次开模后的结构示意图；
图 4B是图 4A的俯视图； 图 5A是本发明所述模具第二次合模后的结构示意图；
图 5B是图 5A的俯视图；
图 6A是进行吹塑成型的结构示意图；
图 6B是图 6A的俯视图；
图 7A是本发明所述模具第二次开模后的结构示意图；
图 7B是图 7A的俯视图；
图 8A是反映本发明所述推板动作状态的结构示意图；
图 8B是图 8A的俯视图。
现结合附图和实施例对本发明作进一歩说明：
实施例
如图 1、 2所示， 本发明包括注塑模组件和吹塑模组件。
注塑模组件包括左右方向设置的动模 1和定模 2。动模 1由一组驱动机 构控制其在水平方向左右移动， 从而可以与定模 2开、 合。
定模 2包括浇口套 203， 热流道 204， 瓶胚模腔板 205。 热流道 204是 均分开放式流道。 在定模 2上设置的每块凸起的瓶胚模腔板 202上设置一 排纵向排列的瓶胚模腔 201， 瓶胚模腔 201底部设置有流道注塑口。定模与 普通注塑机固定的注塑端 302 固定连接。 瓶胚模腔板是凸起形状， 以利于 和模时， 下述动模上的吹塑成型模块嵌入瓶胚模腔板的两侧。
动模 1上固定有两排带有吹气口的芯棒 101，与上述定模 2上的瓶胚模 腔 201—一对应。 动模 1 由进气板组件、 基板 103及推板 102组成， 推板 102设置在基板 103的与定模向对的一侧，其受第二组驱动机构的控制可相 对于基板 103在水平方向左右平移， 用于把成品推出， 芯棒 101设置在基 板 103上， 并贯穿该推板 102。 芯棒 101 内部有一个空腔 1011， 空腔的底 部与设置在进气板 6上的气 1011相通， 而空腔的顶部设置出气口 1013， 此 外， 在空腔 1011内部还设置有一条压有一弹簧 1015的模芯杆 1014控制出 气口 1013的开闭。
推板 102的外侧， 即与定模相对的一侧固定有吹塑模组件 4。每列芯棒 配置一个吹塑模组件 4， 吹塑模组件 4由两块吹塑成型模块 401、 402组成， 分别位于动模 1上的每列芯棒 101 的左右两侧， 由第三组液压驱动机构 5 控制两者在水平方向上前后移动 （即与动模水平左右移动的方向垂直）， 从 而实现两模块 401、 402的开合。 在本实施例中， 由于芯棒 101有两列， 从 而相应设置有两套吹塑模组件。 吹塑模组件的每一模块 401、 402的内侧面 设置有一排成型模腔 403， 与每个芯棒 101—一对应。
动模 1的左方与进气板组件 6连接。
加工方法包括注塑， 吹塑加工阶段。 注塑阶段由以下工序组成： 注塑 机合模， 型坯注塑和模具开启； 吹塑阶段由以下工序组成： 吹塑模闭合， 吹气成， 吹塑模开模， 予塑化和产品顶出。
当模具合模注射瓶坯完成后， 动模移动， 带动芯棒一起移动， 芯棒始 终固定在动模不动， 注塑坯料黏附在芯棒上， 模具完全开启后， 吹塑成型 模块在油缸推动下， 推杆使吹塑模块闭合， 当吹塑模块完全闭合后， 芯棒 内部由气缸的推动， 同时吹气， 由吹塑模块完成中空容器的吹塑成型。 吹 塑完成后， 由推板顶出成型成型制品， 然后注塑机再开始进行下一个注塑 一吹塑循环。 工艺过程为在注塑阶段中， 模具闭合， 注塑瓶坯。 模具开启 后， 进入吹塑阶段， 这时， 吹塑成型模块闭合， 吹气成型中空容器， 开启 吹塑成型模块和成型中空容器顶出。 其技术特征在于注塑阶段与吹塑阶段 中， 模具开启后， 成型芯棒始终固定在动模中不移动， 注射坯料黏附在芯 棒上， 模具完全开启后， 吹塑成型模块闭合开始执行， 当吹塑模块完全闭 合后， 芯棒内部拉伸吹气， 完成中空容器的吹塑成型。 注塑阶段在注射与 开模之间， 只有注射坯料成型， 无需保压和冷却定型， 此时注塑机处于合 模状态。 吹塑阶段的吹塑成型模块的闭合， 吹气成型和开启顶出均在同一 个模具上完成。
具体过程如下：
如图 3A、 图 3B所示， 注塑阶段包括： 注塑模闭合： 动模 1 自左而右 向定模 2推进， 芯棒 101插入至瓶胚模腔 201中， 瓶胚模腔向芯棒外表面 注塑坯料 7。注塑完毕后， 如图 4A、 图 4B所示， 模具开启： 动模 1水平左 移， 与定模 2分离从而完成注塑。
如图 5A、 5B所示， 吹塑阶段包括： 在第三驱动机构 5 (液压机构） 的 驱动下， 吹塑模的两块吹塑成型模块 401、 402闭合， 前、 后两侧模块的成 型模腔 403合拢， 共同把每条芯棒 101包围在中心。
如图 6A、 6B所示， 由吹气板组件 6向芯棒 101 内部吹气， 其外表面 的坯料 7膨胀充满左右成型模腔 403围成的空间， 形成成型制品 8。
如图 7A、 7B所示， 吹塑完成后， 两吹塑成型模块 401、 402分开， 露 出成型制品 8。
如图 8A、 8B所示， 推板 102向右平移， 从而顶出成型制品 8， 成型制 品 8从动模 1、 静模 2之间的空隙掉出并被收集。
从而一个生产循环就此完成， 然后注塑机再开始进行下一个注塑一一 吹塑循环。
采用本发明的模具， 可以克服二歩法和二工位方法的生产工艺环节多， 设备投资大的缺点， 模具结构紧凑， 安装容易， 操作维修简单， 从型坯到 制品一歩完成， 对中性好， 产品表面无夹缝， 产品质量更容易保证， 大大 提高了自动化程度和生产效率。

Claims

1、 一歩法、 单工位注、 吹塑料中空容器成型产品的模具， 包括注塑模 组件和吹塑模组件； 注塑模组件包括水平左右平行设置的动模和定模， 动 模由第一组驱动机构控制其与定模的开合； 定模上设置有至少一排纵向排 列的瓶胚模腔， 动模上固定有至少一排纵向排列的带有吹气口的芯棒， 与 定模上的瓶胚模腔一一对应； 每排芯棒的配置一吹塑模组件， 每个吹塑模 组件包括两块注塑成型模块， 分别位于上述芯棒的前后两侧， 每一模块的 内侧面设置有至少一排成型模腔， 与每个芯棒一一对应， 及两模块的开合 由第三驱动机构控制。
2、 根据权利要求 1所述的模具， 其特征在于： 定模包括浇口套， 热流 道， 瓶胚模腔板； 热流道是均分开放式流道； 在所述的每块凸起的瓶胚模 腔板上设置一排纵向排列的瓶胚模腔， 瓶胚模腔底部设置有流道注塑口。
3、 根据权利要求 1所述的直接注、 吹塑料中空容器成型产品的模具， 其特征在于： 所述动模的内侧面设有一可水平方向左右移动的推板， 芯棒 贯穿该推板， 及推板外侧面支承吹塑模， 该推板的移动由第二驱动机构控 制。
4、 根据权利要求 1所述的模具， 其特征在于： 芯棒内部有一个空腔， 空腔的底部与设置在进气板上的气缸相通， 而空腔的顶部设置出气口， 此 外， 在空腔内部还设置有一条压有一弹簧的模芯杆控制出气口的开闭。
5、 根据权利要求 1所述的模具， 其特征在于： 所述动模的下面与进气 板组件连接。
6、 根据权利要求 1所述的模具， 其特征在于： 所述驱动机构为液压驱 动机构、 气动驱动机构、 电磁驱动机构或机械式驱动结构。
7、 一种在普通注塑机上用一歩法单工位、 型芯固定， 型芯不旋转或不 平移， 一次完成注塑一吹塑塑料中空容器成型产品的方法， 是在普通注塑 机上， 安装一副直接注、 吹塑料中空容器成型产品的模具， 按照注塑， 吹 塑两个加工阶段进行； 注塑阶段包括： 模具闭合， 注塑， 模具开启； 吹塑 阶段包括： 吹塑成型模块闭合， 吹气成型， 开启吹塑成型模块和成型中空 容器顶出。 其特征在于： 所述的注塑阶段与吹塑阶段中， 模具开启后， 成 型芯棒始终固定在动模中， 不需要动力机构驱动旋转或平移； 注射成型坯 料黏附在芯棒上， 模具完全开启后， 型芯两侧的吹塑成型模块在推杆的作 用下闭合， 当吹塑模块完全闭合后， 芯棒内部吹气， 完成中空容器的吹塑 成型；
所述的注塑阶段在注射与开模之间， 只有注射坯料成型， 无需保压和 冷却定型， 此时注塑机处于合模状态；
所述吹塑阶段的吹塑成型模块的闭合， 吹气成型和开启顶出均在同一 个模具上完成。
8、 根据权利要求 7所述的注-吹塑料中空容器成型方法， 其特征在于， 吹塑阶段的吹塑成型模块的闭合， 由驱动机构推动与吹塑成型模块固定连 接的推杆， 使吹塑成型模块开闭， 成型模块的中心与带有型坯的芯棒同轴。
9、 根据权利要求 7所述的注-吹塑料中空容器成型方法， 其特征在于， 其芯棒可为单排或多排排列， 相应吹塑成型模块的模腔数量与之对应， 可 一模多排、 多腔进行中空容器的注吹成型。
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