WO2007098696A1

WO2007098696A1 - A mould for injecting and blowing plastic hollow container forming product directly

Info

Publication number: WO2007098696A1
Application number: PCT/CN2007/000640
Authority: WO
Inventors: Jinqiang Huang
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-03
Filing date: 2007-02-28
Publication date: 2007-09-07
Anticipated expiration: 2008-09-03
Also published as: CN1817619A; CN100467252C

Abstract

A mould for injecting and blowing plastic hollow container forming product directly, comprises: an injection mould assembly and a blow mould assembly. The injection mould assembly comprises a movable die (4) and a fixed die (5) provided in the up-down direction. The movable die (4) can move in the vertical direction under the control of a drive motor. The fixed die (5) has at least one row of injection opening (9), and the movable die (4) has at least one row of core (1) having blow opening corresponding to the injection opening (9) of the fixed die (5). The blow mould assembly comprises two mould plates (10) which are located on two sides of the core (1). Either of the two mould plates (10) has at least one row of finished product opening (101) corresponding to the core (1). The moving of the two mould plates (10) in the horizontal direction is controlled under another drive motor.

Description

直接注、吹塑料中空容器成型产品的模具 Direct injection, blow molding of plastic hollow container molding products

本发明所属技术领域 Technical field to which the present invention pertains

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——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。 The invention belongs to the technical field of plastic processing, and particularly relates to a special mold for molding a plastic hollow container molding product by using a set of molds on an injection molding machine, and is mainly applied to a common injection molding machine.

在本发明之前的现有技术 Prior art prior to the present invention

在塑料的吹塑产品成型加工过程中，传统工艺采用挤出——吹塑成型方法。这种方法生产出来的产品，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。而且不可避免地出现多余的边角料，造成生产原料的浪费和增大产品成型的成本。 In the molding process of plastic blow molding products, the conventional process uses an extrusion-blow molding method. The product produced by this method has an unremovable protruding crevice on the surface of the product, which makes the surface of the product unsightly and smooth. Moreover, unnecessary scraps are inevitably present, resulting in waste of production materials and an increase in the cost of product formation.

由于以上原因，开发了一种两步法注——吹中空成型吹塑产品的方法。其方法是先注塑出吹塑型坯，在转到吹塑机上加热吹胀成中空容器产品，在这种加工方法中，生产环节多，设备投资大，成型工艺复杂，自动化程度不高。最近，为了克服以上缺陷，发明了一种新的塑料中空容器成型方法，见公开号为 CN 1562610A的中国发明专利。它主要适用于二工位卧式平移式模具中。这种方法是注塑模具与吹塑模具分离，注塑的吹塑型坯在注塑模具注塑成型后，转移到注塑机模具外的吹塑模具才进行吹塑形成产品。这种方法需要特殊结构的注塑机，生产工艺控制困难，一次性投资大，而且模具结构不紧凑，对中性不好，产品质量不容易保证。 For the above reasons, a two-step method has been developed - a method of blowing a blow molded product. The method comprises the following steps of injection molding a blown parison and heating and inflating into a hollow container product on a blow molding machine. In this processing method, the production process is large, the equipment investment is large, the molding process is complicated, and the degree of automation is not high. Recently, in order to overcome the above drawbacks, a new plastic hollow container molding method has been invented, see Chinese invention patent No. CN 1562610A. It is mainly suitable for use in two-station horizontal translation molds. This method separates the injection mold from the blow mold. After the injection molding of the blow molded parison is injected into the injection mold, the blow mold is transferred to the blow mold outside the mold of the injection molding machine to form a blow molding product. This method requires a special structure of the injection molding machine, the production process control is difficult, the one-time investment is large, and the mold structure is not compact, the neutrality is not good, and the product quality is not easy to guarantee.

发明目的 Purpose of the invention

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。本发明采用的技术方案 SUMMARY OF THE INVENTION The object of the present invention is to provide a mold for injection molding and blow molding a plastic product on a conventional injection molding machine in view of the above-mentioned deficiencies of the prior art. Technical solution adopted by the invention

为达到上述目的，本发明的技术方案如下：直接注、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；注塑模组件包括上下方向设置的动模和定模，动模由一组驱动机构控制其与定模在垂直方向上的开合；定模上设置有至少一排注塑口，动模上固定有至少一排带有吹塑口的芯棒，与定模上的注塑口一一对应；吹塑模组件包括两块模板，分别位于上述芯棒的两侧，每一模板的内侧面设置有至少一排成品模口，与每个芯棒一一对应，及两模板水平方向的开合由另一组驱动机构控制。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。 In order to achieve the above object, the technical solution of the present invention is as follows: a mold for directly injecting and blowing a plastic hollow container molding product, comprising an injection mold assembly and a blow mold assembly; the injection mold assembly includes a movable mold and a fixed mold disposed in an up and down direction. The movable mold is controlled by a set of driving mechanisms to open and close with the fixed mold in the vertical direction; the fixed mold is provided with at least one row of injection ports, and the movable mold is fixed with at least one row of mandrels with blow molding ports, and The injection molding port on the fixed mold has a one-to-one correspondence; the blow molding module includes two templates, which are respectively located on two sides of the core rod, and each of the inner sides of the template is provided with at least one row of finished mold ports, and one for each core rod One correspondence, and the opening and closing of the two templates in the horizontal direction are controlled by another group of driving mechanisms. The mold of the present invention can be directly mounted on an ordinary injection molding machine. After the injection molding is completed, the injection mold is opened, and then the mold is blown and blow molded.

上述动模的上面设有一可垂直方向移动的推板，芯棒贯穿该推板，及推板之上支承吹塑模。 The upper surface of the movable mold is provided with a push plate movable in a vertical direction, the core rod runs through the push plate, and the blow mold is supported on the push plate.

上述推板上面对应芯棒的贯穿位置设有注一吹塑凸台。 The punching plate is provided with a blow-molding boss on the top of the push plate corresponding to the mandrel.

上述动模的下面与气板组件连接。 The lower surface of the movable mold is connected to the air plate assembly.

采用本发明所述的模具，可实现在普通注塑机上用一套模具一次完成塑料产品的注塑一一吹塑成型，不需要增添额外设备，投资小，操作简单，自动化程度和生产效率高，质量更保证。真正实现注塑型坯和中空容器吹塑成型均在同一模具上完成。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，克服二步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、从型坯到制品一步完成，对中性好，产品表面无夹缝，产品质量更容易保证。附图说明 By adopting the mold of the invention, the injection molding of the plastic product can be completed once by using a set of molds on a common injection molding machine, without adding additional equipment, the investment is small, the operation is simple, the automation degree and the production efficiency are high. The quality is guaranteed. The actual realization of injection molding parison and hollow container blow molding are completed on the same mold. Compared with the prior art, the invention has the following advantages: 1. Directly using an ordinary injection molding machine, overcoming the disadvantages of the production process of the two-step 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 in one step, good neutrality, no seam on the surface of the product, the product quality is easier to guarantee. DRAWINGS

图 1是采用本发明所述的模具进行一步法生产的流程框图； Figure 1 is a flow chart showing the one-step production using the mold of the present invention;

图 2是本发明的结构示意图； Figure 2 is a schematic view of the structure of the present invention;

图 3是本发明所述吹塑模与定模芯棒之间位置关系的结构示意图；图 4是本发明所述模具第一次合模后的结构示意图； 3 is a structural schematic view showing the positional relationship between the blow mold and the fixed mold core rod according to the present invention; FIG. 4 is a schematic structural view of the mold of the present invention after the first mold clamping;

图 5是本发明所述模具第一次开模后的结构示意图； Figure 5 is a schematic view showing the structure of the mold of the present invention after the first mold opening;

图 6是本发明所述模具第二次合模后的结构示意图； Figure 6 is a schematic view showing the structure of the mold of the present invention after the second clamping;

图 7是进行吹塑成型的结构示意图； Figure 7 is a schematic view showing the structure of blow molding;

图 8是本发明所述模具第一次开模后的结构示意图； Figure 8 is a schematic structural view of the mold of the present invention after the first mold opening;

图 9是反映本发明所述推板动作状态的结构示意图。 Fig. 9 is a schematic view showing the structure of the push plate in accordance with the present invention.

现结合附图和实施例对本发明作进一步说明： The present invention will now be further described in conjunction with the drawings and embodiments:

实施例 Example

如图 2、 3所示，本发明包括注塑模组件和吹塑模组件。注塑模组件包括上下方向设置的动模 4和定模 5。动模 4由一组驱动机构控制其与定模 5 在垂直方向上的开合。定模 5上设置有一排注塑口 9，注塑口与定模 5上的注嘴 51连通。动模 4上固定有一排带有吹塑口的芯棒 1，与上述定模 5上的注塑口 9一一对应。动模 4的上面设有一可垂直方向移动的推板 8，用于把成品推出，芯棒 1贯穿该推板 8，及推板 8之上支承吹塑模组件 2。吹塑模组件 2由两块模板 10组成，分别位于动模 4上的芯棒 1的左右两侧，由一组液压驱动机构 3控制两者水平方向上的开合。每一模板 10的内侧面设置有一排成品模口 101，与每个芯棒 1一一对应。动模 4的下面与气板组件 41连接。上述推板 8上面对应芯棒 1的贯穿位置设有注一吹塑凸台 81。如图 1所示，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 11，型坯注塑 12和模具开启 13; 吹塑阶段由以下工序组成：吹塑模闭合 21，吹气成型 22, 吹塑模开模 24，予塑化 23和产品顶出 25。具体过程如下： As shown in Figures 2 and 3, the present invention includes an injection mold assembly and a blow mold assembly. The injection mold assembly includes a movable mold 4 and a stationary mold 5 which are disposed in the up and down direction. The movable mold 4 is controlled by a group of driving mechanisms to open and close with the fixed mold 5 in the vertical direction. The fixed mold 5 is provided with a row of injection ports 9, which are in communication with the nozzles 51 on the stationary mold 5. The movable mold 4 is fixed with a row of mandrels 1 having blow molding ports, which are in one-to-one correspondence with the injection ports 9 on the fixed mold 5. The upper surface of the movable mold 4 is provided with a push plate 8 which is vertically movable for pushing out the finished product, the core rod 1 is inserted through the push plate 8, and the blow mold assembly 2 is supported above the push plate 8. The blow mold assembly 2 is composed of two templates 10 which are respectively located on the left and right sides of the mandrel 1 on the movable mold 4, and are controlled by a group of hydraulic drive mechanisms 3 to open and close in both horizontal directions. A row of finished die 101 is disposed on the inner side of each of the templates 10, and corresponds to each of the mandrels 1. The lower surface of the movable mold 4 is connected to the gas plate assembly 41. The injection plate 8 is provided with a blow-molding boss 81 on the upper surface of the push plate 8 corresponding to the mandrel 1. As shown in Figure 1, the processing method includes injection molding and blow molding. The injection molding phase consists of the following processes: injection molding machine clamping 11, parison injection 12 and mold opening 13; the blowing phase consists of the following processes: blow mold closure 21, blow molding 22, blow mold opening 24, plasticizing 23 and product ejector 25. The specific process is as follows:

如图 2、图 4和图 5所示，注塑阶段包括：注塑模闭合：动模 4自下而上向定模 5推进，芯棒 1插入至注塑口 9中，注塑口向芯棒外表面注塑坯料 7。注塑完毕后，模具开启：动模下降，与定模分离从而完成注塑。 As shown in Fig. 2, Fig. 4 and Fig. 5, the injection molding stage includes: injection mold closing: the movable mold 4 is advanced from the bottom to the fixed mold 5, the core rod 1 is inserted into the injection port 9, and the injection port is directed to the outer surface of the core rod. Injection molding blank 7. After the injection molding is completed, the mold is opened: the movable mold is lowered, and the mold is separated to complete the injection molding.

如图 6至图 8所示，吹塑阶段包括：在液压结构 3的驱动下，吹塑模的两块模板 10闭合，左右两侧模板的成品模口 101合拢，共同把每条芯棒 1包围在中心，由气板组件向芯棒 1内部吹气，其外表面的坯料膨胀充满左右模口 101围成的空间，形成成型制品 6。如图 9所示，吹塑完成后，两模板 10分开，推板 8垂直向上移动，从而顶出成型制品 6，然后注塑机再开始进行下一个注塑——吹塑循环。 As shown in FIG. 6 to FIG. 8, the blow molding stage includes: under the driving of the hydraulic structure 3, the two templates 10 of the blow mold are closed, and the finished die 101 of the left and right side templates are closed, and each mandrel 1 is collectively Surrounded by the center, the air-plate assembly is blown into the interior of the mandrel 1, and the outer surface of the blank is expanded to fill the space surrounded by the left and right die 101 to form the molded article 6. As shown in Fig. 9, after the blow molding is completed, the two mold plates 10 are separated, and the push plate 8 is vertically moved upward to eject the molded article 6, and then the injection molding machine starts the next injection molding-blowing cycle.

如果采取一模多排多腔模具，利用该模具生产中空容器，在一个加工循环周期中，可以生产 16~32个中空容器，大大提高生产效率，生产成本大大降低。 If a multi-cavity mold with multiple rows is used, the hollow container can be produced by using the mold, and 16 to 32 hollow containers can be produced in one processing cycle, which greatly improves production efficiency and greatly reduces production cost.

采用本发明的模具，可以克服二步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，从型坯到制品一步完成，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。 By adopting the mold of the invention, the production process 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, and the one-step completion from the parison to the product is neutral. 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.

Claims

Rights request

1. A mold for directly injecting and blowing a plastic hollow container molding product, comprising an injection mold assembly and a blow mold assembly, wherein: the injection mold assembly comprises a movable mold and a fixed mold disposed in an up and down direction, and the movable mold is composed of a group The driving mechanism controls the opening and closing of the fixed mold in the vertical direction; the fixed mold is provided with at least one row of injection ports, and the movable mold is fixed with at least one row of mandrel with a blow molding port, and the injection port on the fixed mold One-to-one correspondence; the blow molding module comprises two templates, respectively located on two sides of the core rod, each of the template has at least one row of finished molds on the inner side thereof, one-to-one correspondence with each core rod, and two templates The horizontal opening and closing is controlled by another set of drive mechanisms.

2. The mold according to claim 1, wherein: the upper surface of the movable mold is provided with a push plate movable in a vertical direction, the core rod runs through the push plate, and the blow mold is supported on the push plate.

3. The mold according to claim 2, wherein: the top surface of the push plate is provided with a blow-molding boss corresponding to the penetrating position of the mandrel.

4. The mold according to claim 1, wherein: the lower surface of the movable mold is coupled to the gas plate assembly.

5. The mold according to claim 1, wherein: the drive mechanism is a hydraulic drive mechanism.