WO2020093942A1 - 一种中空体成型模具以及中空体成型方法 - Google Patents
一种中空体成型模具以及中空体成型方法 Download PDFInfo
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- WO2020093942A1 WO2020093942A1 PCT/CN2019/115035 CN2019115035W WO2020093942A1 WO 2020093942 A1 WO2020093942 A1 WO 2020093942A1 CN 2019115035 W CN2019115035 W CN 2019115035W WO 2020093942 A1 WO2020093942 A1 WO 2020093942A1
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- mold
- hollow body
- slider
- body forming
- lifting device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/28—Blow-moulding apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
Definitions
- the invention relates to a molding die and a hollow body molding method, in particular to a hollow body molding die, which belongs to the technical field of hollow body production and processing.
- the molding methods involved in this technical field are mainly divided into two categories.
- One is the molding method described in patent FR2915923B1 and patent DE102009031441B4. Its advantage is that it does not add additional process holes to the box, and the disadvantage is that the mold cannot be closed at one time In place, there is a unique risk of the position of the built-in wave-proof plate, and the fixing device for placing the built-in wave-proof plate and other built-in components needs to be withdrawn before the mold is completely closed, which increases the molding cycle and reduces the production efficiency.
- the other type is the molding method described in the patent US6712234B2.
- This type of molding method is to integrate a fixing device for placing a built-in component such as a wave shield on the bottom blowing pin, and the fixing rod passes through the blowing hole of the blowing pin.
- the design of this kind of tooling requires that the fixed rod must be blown out after the high pressure is blown, and the mold can only be withdrawn after opening.
- the molded product will have a process hole, which needs to be welded with a "cap” to seal, but the discharge after welding is relatively
- the existing stringent emission regulations are still very high, even if the company proposes a remedy solution in the subsequent patent EP1512516B1, that is, after the high-pressure blowing is completed, the process hole is squeezed and closed by a pinch plate, but this time
- the temperature of the parison is only 70-80 °C, and the melting point of HDPE is generally around 130 °C. By extrusion in this temperature range, it is basically impossible to completely weld the parison together.
- the present invention is directed to the technical problems existing in the prior art, and provides a hollow body forming mold.
- the technical solution properly solves the problem that the existing hollow body based on the traditional hollow body forming technology has poor stability of the built-in parts during the forming process Moreover, the problem of long molding cycle or the existence of process holes after molding requires subsequent welding and sealing, and the problem of relatively high emissions after welding.
- a hollow body forming mold is characterized in that the forming mold includes left and right mold halves, and a left escape groove is provided at the bottom of the left mold halves.
- the bottom of the die is provided with a right avoidance groove, a left bottom slider is provided in the left escape groove, a right bottom slider is provided in the right escape groove, and the left and right bottom sliders constitute a group of slides.
- the left and right avoidance grooves are symmetrically distributed and have the same width; the left and right bottom sliders are symmetrically distributed and have the same width.
- the left and right bottom sliders form a part of the knife edge of the left and right half dies.
- the left and right bottom sliders there is at least one of the left and right bottom sliders, and only one of them is part of the bottom knife edge.
- This group of sliders is called bottom slider one; the remaining slider groups can be arranged Below the bottom slider one.
- the left and right sliders are respectively connected to the left and right mold halves of the mold through a driving device.
- the driving device is usually any one of conventional drives such as hydraulic oil cylinders, air cylinders, and servo motors.
- a hollow body molding method includes the following steps:
- Step 1) Install the built-in components to the lifting device
- Step 2) Blanking the parison to the designated position
- Step 3 The lifting device sends the wave-proof plate into the molten cylindrical parison;
- Step 4) The stretch rod is opened to expand the parison
- Step 5 The clamping plate is closed and the parison is sealed;
- Step 7) The mold is closed;
- Step 8 After the mold is closed in place, the lifting device descends to the outside of the mold;
- Step 9) The slider at the bottom of the mold advances into place under the drive of the driving device;
- Step 10) High pressure blowing inside the mold (parison);
- Step 11 After the high-pressure blowing is completed, the mold is opened, and the slider at the bottom of the mold moves backward;
- Step 12 The manipulator takes out the product.
- the step 7) the mold closing is once closed in place, and the slider at the bottom of the mold is located in the backward position during this process;
- the step 9) After the slider at the bottom of the mold advances into place, the slider at the bottom merges with the knife edge of the bottom to completely seal the mold cavity; at the same time, the progress of the slider at the bottom of the mold It has the effect of squeezing and kneading the parison, which can squeeze and close the process hole left after the lifting device is lowered.
- the parison temperature is above 140 ° C, the parison is in a molten state, and has good welding strength after extrusion and kneading.
- the bottom slider one may further have a bottom slider two, and the bottom slider two needs to be advanced into position before the mold is closed.
- the step 1) installs a built-in component to the lifting device, wherein the built-in component includes one or more of oil tank built-in parts such as a wave prevention plate and a valve pipe assembly.
- the step 1) installs the built-in component to the lifting device
- the lifting device can also have a side shift function, which can be moved to the outside of the mold through the side shift mechanism after the lifting device is lowered below the mold to complete the steps in advance during the high-pressure blowing process inside the mold 1) The step of installing the built-in components on the lifting device.
- the lateral movement function can realize the whole or partial movement of the lifting device in the direction of vertical mold closing.
- the lateral movement mechanism is composed of a guide rail and a driving device.
- the driving device is a hydraulic oil cylinder, a cylinder, One or more of conventional drives such as servo motors.
- the present invention has the following advantages: 1) The hollow body forming mold designed by the technical solution is compact and ingenious, and can solve the existence of the hollow body of the traditional technology forming belt with built-in components without increasing the forming cycle The technical difficulty of the process hole has the advantage of reducing emissions; 2) The hollow body molding method involved in this technical solution, the mold is closed in place at one time, there is no need to divide the mold in two steps, and the built-in parts are well combined with the inner wall of the fuel tank and the position is stable The advantages of high performance; 3) The hollow body molding method involved in this technical solution is to lower the lifting device under the mold during the high-pressure blowing inside the mold, without the need to lift the lifting device before the mold is closed in place or after the mold is opened.
- Figure 1 is a schematic diagram of step 1) process
- Figure 2 is a schematic diagram of the mold is opened, the bottom slider is located in a retracted position
- Figure 3 is a schematic diagram of step 3) process
- Figure 4 is a schematic diagram of step 6) process
- Figure 5 is a schematic diagram of step 7) process
- Figure 6 is step 7) After the mold is closed in place, a partial schematic view of the internal state of the mold;
- FIG. 7 is a schematic diagram of the mold is closed, the bottom slider is located in a retracted position
- Figure 8 is a schematic diagram of step 8) process
- Figure 9 is a partial schematic view of the internal state of the mold after step 9) the bottom slider is advanced into place;
- FIG. 10 is a schematic view of the mold closed state, the bottom slider is located in a forward position
- Fig. 11 is a schematic diagram of a bottom slider 2 at the bottom of the mold. When the mold is open, the bottom slider 1 and the bottom slider 2 are both located in the backward position;
- Fig. 12 is a schematic diagram of a bottom slider 2 at the bottom of the mold. When the mold is open, the bottom slider 1 is in the backward position and the bottom slider 2 is in the forward position;
- Fig. 13 is a schematic diagram of the bottom slider 2 at the bottom of the mold, the mold is in a closed state, the bottom slider 1 is located at the backward position, and the bottom slider 2 is located at the forward position;
- Fig. 14 is a schematic diagram of the bottom slider 2 at the bottom of the mold, and the mold is in a closed state.
- Embodiment 1 Referring to FIGS. 1-10, a hollow body molding die includes left and right mold halves 1, a left escape groove 9 is provided at the bottom of the left mold half, and a bottom part of the right mold half is provided There is a right avoidance slot 9, a left bottom slider is provided in the left avoidance slot, a right bottom slider is provided in the right avoidance slot, and the left and right bottom sliders constitute a group of sliders.
- the left and right avoidance grooves 9 are symmetrically distributed and have the same width; the left and right bottom sliders are symmetrically distributed and have the same width.
- the left and right bottom sliders are part of the blades forming the bottom of the left and right half dies; there are only one left and right escape grooves.
- This group of sliders is called bottom slider one 2; the remaining slider groups can be arranged under the bottom slider one .
- the left and right sliders are respectively connected to the left and right mold halves 1 of the mold through a driving device, and the driving device is usually any one of conventional drives such as hydraulic oil cylinders, air cylinders, and servo motors.
- Embodiment 2 Referring to FIGS. 1-10, a method for forming a hollow body, the method includes the following steps:
- Step 1) Install the built-in components to the lifting device
- Step 2) Blanking the parison to the designated position
- Step 3 The lifting device sends the anti-wave plate into the molten cylindrical parison.
- the position of the lifting device into the parison is determined according to the connection position of the built-in parts and the fuel tank shell in the product design.
- Step 4) The stretch rod is opened to expand the parison, and the opening direction is perpendicular to the mold closing direction;
- Step 5 The clamping plate is closed, the parison is sealed, and the closing direction is consistent with the mold closing direction;
- Step 7) The mold is closed;
- Step 8 After the mold is closed in place, the lifting device descends to the outside of the mold;
- Step 9) The slider at the bottom of the mold advances into place under the drive of the driving device.
- the slider at the bottom is a component of the lower blade of the mold. After it is in place, it will merge with the lower blade of the mold;
- Step 10) High pressure blowing inside the mold (parison);
- Step 11 After the high-pressure blowing is completed, the mold is opened, and the slider at the bottom of the mold moves backward;
- Step 12 The manipulator takes out the product.
- Embodiment 3 Referring to FIGS. 1 to 14, a hollow body forming method includes the following steps:
- Step 1) Install the built-in components to the lifting device
- Step 2) Blanking the parison to the designated position
- Step 3 The lifting device sends the wave-proof plate into the molten cylindrical parison.
- the position of the lifting device into the parison is determined according to the connection position of the built-in parts and the fuel tank shell in the product design. Different products will be different;
- Step 4) The stretch rod is opened to expand the parison, and the opening direction is perpendicular to the mold closing direction;
- Step 5 The clamping plate is closed, the parison is sealed, and the closing direction is consistent with the mold closing direction;
- Step 7) The bottom slider 2 advances into place and the mold is closed;
- Step 8 After the mold is closed in place, the lifting device descends to the outside of the mold;
- Step 9) The slider at the bottom of the mold advances into position under the drive of the driving device.
- the slider 1 is a component of the lower blade of the mold. After it is advanced, it will merge with the lower blade of the mold;
- Step 10) High pressure blowing inside the mold (parison);
- Step 11 After the high-pressure blowing is completed, the mold is opened, and the slider at the bottom of the mold moves backward;
- Step 12 The manipulator takes out the product.
- Embodiment 4 Referring to FIGS. 1-10, as an improvement of the present invention, the step 1) installs a built-in component to the lifting device, wherein the lifting device can have a side shift function in addition to lifting and lowering functions, which can After the lifting device is lowered below the mold, it is moved to the outside of the mold through the side shift mechanism to complete the step of installing the built-in components in advance during the high-pressure blowing inside the mold; it can realize the whole or partial movement of the lifting device in the vertical mold closing direction
- This function is realized by a guide rail and a driving device, which is any one of conventional drives such as hydraulic oil cylinders, air cylinders, and servo motors; this method can shorten the molding cycle and improve the molding efficiency.
- the remaining steps are the same as in Embodiment 2 or 3.
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Abstract
一种中空体成型模具以及中空体成型方法，所述成型模具包括左、右半模（1），所述左半模（1）底部设有左避让槽（9），所述右半模（1）底部设有右避让槽（9），所述左避让槽（9）内设有左底部滑块（2），所述右避让槽（9）内设有右底部滑块（2），所述左、右底部滑块（2）构成一组滑块。该模具设计解决了现有传统工艺成型带内置组件的中空体具有工艺孔的难题；该中空体成型方法具有成型周期短，生产效率高，内置件与油箱内壁结合好，位置稳定性高的优点；该中空体成型方法，无成型工艺孔，无需增加后道焊接"盖帽"密封的工序，具有排放低，设备、人员投入成本低的优点。
Description
本发明涉及一种成型模具以及中空体成型方法，具体涉及一种中空体成型模具，属于中空体生产加工技术领域。
现有中空体成型技术中，最先进的当属两片技术，但由于其设备、工装的投资成本较高，通过该技术制造的塑料燃油箱价格也大幅提升，这使得主机厂在制造经济型车辆时，一般优先考虑的还是低成本的传统技术，但是，随着各国排放法规要求的越来越苛刻，传统技术制造的塑料燃油箱很难满足苛刻的排放法规要求，尤其是通过传统技术在成型过程中内置防浪板等组件的塑料燃油箱。
目前，在该技术领域涉及到的成型方法主要分为两类，一类是专利FR2915923B1和专利DE102009031441B4所描述的成型方法，其优点是没有给箱体增加额外的工艺孔，缺点是模具不能一次闭合到位，内置的防浪板位置存在不唯一的风险，且放置防浪板等内置组件的固定装置需在模具完全闭合前退出，增加了成型周期，降低了生产效率。
另一类是专利US6712234B2所描述的成型方法，该类成型方法是将放置防浪板等内置组件的固定装置集成在底部吹针上，固定杆从吹针的吹气孔穿过。此类工装的设计要求固定杆必须在高压吹结束，模具打开后，才能退出，因此，成型后的产品上会留有工艺孔，需后续焊接一个“盖帽”来密封，但焊接后的排放相对现有苛刻的排放法规 要求，依然很高，即使该公司在后续专利EP1512516B1中提出了弥补的方案，即高压吹结束后通过挤压板(pinch plate)将工艺孔挤压闭合，但是此时型坯温度只剩70-80℃，而HDPE的熔点一般在130℃左右，在这个温度区域通过挤压，型坯已基本不可能完全熔接在一起。目前，现有技术中还没有比较理想的解决方法，因此，迫切的需要一种新的方案解决该技术问题。
发明内容
本发明正是针对现有技术中存在的技术问题，提供一种中空体成型模具，该技术方案妥善解决了现有技术中基于传统中空体成型技术在成型过程中内置组件存在内置件位置稳定性差且成型周期长的问题或成型后存在工艺孔，需后续焊接焊密封，且焊接后排放仍相对较高的问题。
为了实现上述目的，本发明的技术方案如下，一种中空体成型模具，其特征在于，所述成型模具包括左、右半模，所述左半模底部设有左避让槽，所述右半模底部设有右避让槽，所述左避让槽内设有左底部滑块，所述右避让槽内设有右底部滑块，所述左、右底部滑块构成一组滑块。
作为本发明的一种改进，所述左、右避让槽呈对称分布，且宽度一致；所述左、右底部滑块呈对称分布，且宽度一致。
作为本发明的一种改进，所述左、右底部滑块是构成左、右半模底部刀口的一部分。
作为本发明的一种改进，所述左、右避让槽有且仅有一个。
作为本发明的一种改进，所述左、右底部滑块至少各有一个，且 各自仅有一个是组成底部刀口的一部分，该组滑块称为底部滑块一；其余滑块组可布置在底部滑块一的下方。
作为本发明的一种改进，所述左、右滑块通过驱动装置分别与模具左、右半模连接，所述驱动装置通常为液压油缸、气缸、伺服电机等常规驱动中的任一种。
一种中空体成型方法，所述方法包括以下步骤：
步骤1)安装内置组件到升降装置上；
步骤2)型坯下料至指定位置；
步骤3)升降装置将防浪板送入熔融的筒状型坯中；
步骤4)绷料杆打开，扩张型坯；
步骤5)夹料板闭合，密封型坯；
步骤6)预吹；
步骤7)模具闭合；
步骤8)模具闭合到位后，升降装置下降至模具外部；
步骤9)模具底部滑块一在驱动装置的带动下前进到位；
步骤10)模具(型坯)内部高压吹；
步骤11)高压吹结束，模具打开，模具底部滑块一后退；
步骤12)机械手取出产品。
作为本发明的一种改进，所述步骤7)模具闭合是一次闭合到位，且此过程模具底部滑块一位于后退位置；
作为本发明的一种改进，所述步骤9)模具底部滑块一前进到位后，底部滑块一与底部刀口融为一体，将模具型腔完全密封；同时，模具底部滑块一的前进过程对型坯具有挤压捏合的作用，可将升降装置下降后留下的工艺孔挤压闭合。该过程中，型坯温度在140℃以上，型坯处于熔融状态，挤压捏合后具有较好的熔接强度。
作为本发明的一种改进，所述底部滑块一下方还可具有底部滑块二，所述底部滑块二需在模具合模前前进到位。
作为本发明的一种改进，所述步骤1)安装内置组件至升降装置，其中内置组件包括防浪板、阀管总成等油箱内置件的一种或者多种。
作为本发明的一种改进，所述步骤1)安装内置组件至升降装置，
其中升降装置除了具有升、降功能，还可具有侧移功能，其可在升降装置下降到模具下方后，再通过侧移机构，移到模具外侧，以在模具内部高压吹过程中提前完成步骤1)安装内置组件到升降装置上的步骤。
作为本发明的一种改进，所述侧移功能可实现升降装置整体或局部在垂直模具闭合方向的移动，所述侧移机构由导轨和驱动装置组成，所述驱动装置为液压油缸、气缸、伺服电机等常规驱动中的一种或多种。
相对于现有技术，本发明具有如下优点，1)该技术方案所设计的中空体成型模具结构紧凑、巧妙，可在不增加成型周期的前提下，解决传统技术成型带内置组件的中空体存在工艺孔的技术难题，具有降低排放的优点；2)该技术方案中所涉及的中空体成型方法，模具一次闭合到位，无需分两步合模，具有内置件与油箱内壁结合较好，位置稳定性高的优点；3)该技术方案中所涉及的中空体成型方法，是在模具内部高压吹的过程中，将升降装置下降到模具下方，无需在模具闭合到位前或开模后将升降装置下降到模具下方，缩减了升降装置下降的时间，具有成型周期短，生产效率高的优点；4)该技术方案中所涉及的中空体成型方法，无成型工艺孔，无需增加后道焊接“盖帽”密封的工序，具有降低了由该道焊接工序所带来的设备、人员投入成本的优点。
图1为步骤1)过程示意图；
图2为模具打开状态，底部滑块一位于后退位置示意图；
图3为步骤3)过程示意图；
图4为步骤6)过程示意图；
图5为步骤7)过程示意图；
图6为步骤7)模具闭合到位后，模具内部状态局部示意图；
图7为模具闭合状态，底部滑块一位于后退位置示意图；
图8为步骤8)过程示意图；
图9为步骤9)底部滑块一前进到位后，模具内部状态局部示意图；
图10为模具闭合状态，底部滑块一位于前进位置示意图；
图11为模具底部设有底部滑块二，模具打开状态，底部滑块一和底部滑块二均位于后退位置示意图；
图12为模具底部设有底部滑块二，模具打开状态，底部滑块一位于后退位置，底部滑块二位于前进位置示意图；
图13为模具底部设有底部滑块二，模具闭合状态，底部滑块一位于后退位置，底部滑块二位于前进位置示意图；
图14为模具底部设有底部滑块二，模具闭合状态，底部滑块一和底部滑块二均位于前进位置示意图；
图中：1-半模；2-底部滑块一；3-底部滑块二；4-夹料板；5-绷料杆；6-内置件；7-升举装置，8-型坯,9-避让槽。
为了加深对本发明的理解，下面结合附图对本实施例做详细的说明。
实施例1：参见图1-图10，一种中空体成型模具，所述成型模具包括左、右半模1，所述左半模底部设有左避让槽9，所述右半模底部设有右避让槽9，所述左避让槽内设有左底部滑块，所述右避让槽内设有右底部滑块，所述左、右底部滑块构成一组滑块。
该方案中，所述左、右避让槽9呈对称分布，且宽度一致；所述左、右底部滑块呈对称分布，且宽度一致。其中，所述左、右底部滑块是构成左、右半模底部刀口的一部分；所述左、右避让槽有且仅有一个。所述左、右底部滑块至少各有一个，且各自仅有一个是组成底部刀口的一部分，该组滑块称为底部滑块一2；其余滑块组可布置在底部滑块一的下方。所述左、右滑块通过驱动装置分别与模具左、右半模1连接，所述驱动装置通常为液压油缸、气缸、伺服电机等常规驱动中的任一种。
实施例2：参见图1-图10，一种中空体成型方法，所述方法包括以下步骤：
步骤1)安装内置组件到升降装置上；
步骤2)型坯下料至指定位置；
步骤3)升降装置将防浪板送入熔融的筒状型坯中，升降装置进入型坯中的位置根据产品设计中内置件与油箱壳体的连接位置决定，不同产品会有不同；
步骤4)绷料杆打开，扩张型坯，打开方向与模具闭合方向垂直；
步骤5)夹料板闭合，密封型坯，闭合方向与模具闭合方向一致；
步骤6)预吹；
步骤7)模具闭合；
步骤8)模具闭合到位后，升降装置下降至模具外部；
步骤9)模具底部滑块一在驱动装置的带动下前进到位，底部滑块一是模具下刀口的组成部分，前进到位后，会与模具下刀口融为一体；
步骤10)模具(型坯)内部高压吹；
步骤11)高压吹结束，模具打开，模具底部滑块一后退；
步骤12)机械手取出产品。
实施例3：参见图1-图14，一种中空体成型方法，包括以下步骤：
步骤1)安装内置组件到升降装置上；
步骤2)型坯下料至指定位置；
步骤3)升降装置将防浪板送入熔融的筒状型坯中，升降装置进入型坯中的位置根据产品设计中内置件与油箱壳体的连接位置决定，不同产品会有不同；
步骤4)绷料杆打开，扩张型坯，打开方向与模具闭合方向垂直；
步骤5)夹料板闭合，密封型坯，闭合方向与模具闭合方向一致；
步骤6)预吹；
步骤7)底部滑块二前进到位，模具闭合；
步骤8)模具闭合到位后，升降装置下降至模具外部；
步骤9)模具底部滑块一在驱动装置的带动下前进到位，滑块一是模具下刀口的组成部分，前进到位后，会与模具下刀口融为一体；
步骤10)模具(型坯)内部高压吹；
步骤11)高压吹结束，模具打开，模具底部滑块一后退；
步骤12)机械手取出产品。
实施例4：参见图1-图10，作为本发明的一种改进，所述步骤1)安 装内置组件至升降装置，其中升降装置除了具有升、降功能，还可具有侧移功能，其可在升降装置下降到模具下方后，再通过侧移机构，移到模具外侧，以在模具内部高压吹过程中提前完成安装内置组件的步骤；其可实现升降装置整体或局部在垂直模具闭合方向移动，该功能通过导轨和驱动装置实现，所述驱动装置为液压油缸、气缸、伺服电机等常规驱动中的任一种；此方法可以缩短成型周期，提高成型效率。其余步骤与实施例2或者3相同。
需要说明的是上述实施例，并非用来限定本发明的保护范围，在上述技术方案的基础上所作出的等同变换或替代均落入本发明权利要求所保护的范围。
Claims (12)
- 一种中空体成型模具，其特征在于，所述成型模具包括左、右半模，所述左半模底部设有左避让槽，所述右半模底部设有右避让槽，所述左避让槽内设有左底部滑块，所述右避让槽内设有右底部滑块，所述左、右底部滑块构成一组滑块。
- 根据权利要求1所述的一种中空体成型模具，其特征在于，所述左、右避让槽呈对称分布，且宽度一致；所述左、右底部滑块呈对称分布，且宽度一致。
- 根据权利要求1所述的一种中空体成型模具，其特征在于，所述左、右底部滑块是构成左、右半模底部刀口的一部分，所述左、右避让槽有且仅有一个。
- 根据权利要求1所述的一种中空体成型模具，其特征在于，所述左、右底部滑块至少各有一个，且各自仅有一个是组成底部刀口的一部分，该组滑块称为底部滑块一；其余滑块组可布置在底部滑块一的下方。
- 根据权利要求1所述的一种中空体成型模具，其特征在于，所述左、右底部滑块通过驱动装置分别与模具左、右半模连接，所述驱动装置通常为液压油缸、气缸、伺服电机等常规驱动中的任一种。
- 一种中空体成型方法，其特征在于，所述方法包括以下步骤：步骤1)安装内置组件到升降装置上；步骤2)型坯下料至指定位置；步骤3)升降装置将防浪板送入熔融的筒状型坯中；步骤4)绷料杆打开，扩张型坯；步骤5)夹料板闭合，密封型坯；步骤6)预吹；步骤7)模具闭合；步骤8)模具闭合到位后，升降装置下降至模具外部；步骤9)模具底部滑块一在驱动装置的带动下前进到位；步骤10)模具(型坯)内部高压吹；步骤11)高压吹结束，模具打开，模具底部滑块一后退；步骤12)机械手取出产品。
- 根据权利要求6所述的一种中空体成型方法，其特征在于，所述步骤7)模具闭合是一次闭合到位，且此过程模具底部滑块一位于后退位置。
- 根据权利要求6所述的一种中空体成型方法，其特征在于，所述步骤9)模具底部滑块一前进到位后，底部滑块一与底部刀口融为一体，将模具型腔完全密封；同时，模具底部滑块一的前进过程对型坯具有挤压捏合的作用，可将升降装置下降后留下的工艺孔挤压闭合。
- 根据权利要求6所述的一种中空体成型方法，其特征在于，所述底部滑块一下方还可具有底部滑块二，所述底部滑块二需在模具合模前前进到位。
- 根据权利要求6所述的一种中空体成型方法，其特征在于，所述步骤1)安装内置组件至升降装置，其中内置组件包括防浪板、阀管总成等油箱内置件的一种或者多种。
- 根据权利要求6所述的一种中空体成型方法，其特征在于，所述步骤1)安装内置组件至升降装置，其中升降装置除了具有升、降功 能，还可具有侧移功能，其可在升降装置下降到模具下方后，再通过侧移机构，移到模具外侧，以在模具内部高压吹过程中提前完成步骤1)安装内置组件到升降装置上的步骤。
- 根据权利要求11所述的一种中空体成型方法，其特征在于，所述侧移功能可实现升降装置整体或局部在垂直模具闭合方向的移动，所述侧移机构由导轨和驱动装置组成，所述驱动装置为液压油缸、气缸、伺服电机等常规驱动中的一种或多种。
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