WO2021139453A1 - Machine de soufflage de bouteilles apte à un chauffage additionnel de préformes de bouteilles - Google Patents

Machine de soufflage de bouteilles apte à un chauffage additionnel de préformes de bouteilles Download PDF

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Publication number
WO2021139453A1
WO2021139453A1 PCT/CN2020/133197 CN2020133197W WO2021139453A1 WO 2021139453 A1 WO2021139453 A1 WO 2021139453A1 CN 2020133197 W CN2020133197 W CN 2020133197W WO 2021139453 A1 WO2021139453 A1 WO 2021139453A1
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WO
WIPO (PCT)
Prior art keywords
heating
preform
mold
assembly
bottle
Prior art date
Application number
PCT/CN2020/133197
Other languages
English (en)
Chinese (zh)
Inventor
蔡桂森
Original Assignee
浙江宏振机械模具集团有限公司
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
Application filed by 浙江宏振机械模具集团有限公司 filed Critical 浙江宏振机械模具集团有限公司
Publication of WO2021139453A1 publication Critical patent/WO2021139453A1/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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • 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
    • B29C49/0031—Making articles having hollow walls
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4205—Handling means, e.g. transfer, loading or discharging 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/4823—Moulds with incorporated heating or cooling 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
    • 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
    • B29C49/48—Moulds
    • B29C49/4823—Moulds with incorporated heating or cooling means
    • B29C2049/4838—Moulds with incorporated heating or cooling means for heating moulds or mould parts
    • 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
    • B29L2022/00—Hollow articles

Definitions

  • the invention relates to the field of plastic processing, in particular to a bottle blowing machine.
  • the bottle blowing machine includes a frame and an injection molding mechanism and a bottle blowing mechanism arranged on the frame.
  • the injection molding mechanism heats the received polymer raw materials and then injection molding to form a preform, and the preform is transported to the blowing mechanism through a conveying mechanism.
  • the mechanism was blown into shape.
  • the injection molding mechanism includes injection molding components.
  • the injection molding components are equipped with cooling water channels. The injection molding components are cooled by injecting cooling water into the cooling water channels.
  • the raw materials When in use, the raw materials are injected into the injection mold after being heated and liquefied
  • the liquefied raw material is preliminarily condensed and solidified to form a preform under the action of the cooling water channel.
  • the preform still has a higher temperature, so that the flexibility of the preform meets the requirements of stretch blowing, and the preform is directly fed into The bottle blowing mechanism realizes blow molding.
  • the bottle blowing machine with this structure has the following defects: the uneven arrangement of the cooling water channels and the heat accumulation in the middle of the injection molded component due to the difficulty of heat diffusion, etc. will cause the temperature difference between the various areas of the injection molded component, and then As a result, the preforms formed by injection molding will have temperature differences due to uneven heat dissipation, resulting in some preforms that cannot meet the requirements of stretch blow molding due to their flexibility, which will not only affect the processing efficiency of the blow molding machine, but also lead to waste of raw materials and increase Processing cost.
  • the present invention provides a bottle blowing machine for compensating heating of the preform.
  • a heating assembly for compensating heating of the preform on the bottle blowing mechanism, the preform can be blown and molded.
  • the temperature is increased to the preset temperature, which not only improves the processing efficiency, but also reduces the equipment volume, saves raw materials, and reduces processing costs.
  • a bottle blowing machine for compensating heating of preforms including a frame, on which an injection molding mechanism, a blowing mechanism, and a conveying mechanism are arranged, and the blowing mechanism includes a mold assembly and A bottle blowing assembly matched with a mold assembly, a bottle blowing station is set in the mold assembly, the preform produced by the injection molding mechanism is moved into the bottle blowing station through a conveying mechanism and is blown by the bottle blowing assembly, and the frame is provided with The heating component with heating part moves the preform away from the injection molding mechanism and receives the heat from the heating part before being blow molded, so that the preform can increase the temperature by compensation heating.
  • a heating component is installed on the frame, and the heating component is used to compensate and heat the preforms that are removed from the injection molding machine and before being blown into shape. This means that the preforms are compensated and heated to ensure that they meet the processing temperature before being blown. It is required to effectively prevent the bottle blank from being blown and scrapped due to lack of temperature and flexibility, reduce the size of the machine to save the workshop area, reduce the number of waste products to improve the processing efficiency of the bottle blowing machine, and reduce the use of raw materials by saving raw materials. The cost of raw materials also effectively utilizes the heat left in the injection molding process, effectively reducing the heat required for compensation heating, effectively reducing energy consumption, and reducing energy consumption costs.
  • the heating component performs compensation heating during the process of moving the preform into the blowing station or after positioning at the blowing station, which not only ensures that the heating time of the preform meets the temperature increase requirements, but also shortens the time between compensation heating and blow molding Space to reduce heat loss.
  • the bottle blowing station refers to the position where the bottle preform receives the blow molding operation in the mold assembly. When the bottle preform moves to the bottle blowing station, the mold assembly is closed so that the bottle preform is clamped in the blowing cavity to ensure The preform is blown into shape at the bottle blowing station.
  • the mold assembly includes two side mold plates that are parallel and symmetrically arranged.
  • the mold assembly can be used between the closed state where the side mold plates are closed and the open state where the side mold plates are separated away from each other.
  • the conveying mechanism drives the preform to fall into the bottle blowing station between the side mold plates and is compensated for heating.
  • the side-mounted mold plates enclose the bottle blowing mold cavity for blowing the bottle preform by closing the molds facing each other, and realize the taking and placing of the bottle preform or the bottle body by opening the mold backwards.
  • the side mold plate is separated away from the back and forms a channel for the heating part to insert and compensate and heat the preform.
  • the frame includes a horizontally reciprocating bracket, the heating assembly and the bottle blowing assembly are installed on the bracket in a vertical dislocation manner, and the heating assembly and the bottle blowing assembly are alternately moved above the bottle blowing station to align the heating assembly and the bottle blowing assembly.
  • the preforms undergo compensation heating and blow molding in sequence. Since both the heating component and the bottle blowing component need to act on the preform through the bottle mouth, only one of them can be matched with the preform. Specifically, both the heating component and the bottle blowing component are installed on the bracket to ensure that the two are synchronized and linked. , To ensure that when any one of the heating component and the blowing component is matched with the preform, the other component can effectively avoid it, ensuring that the preform performs compensation heating and blow molding operations in sequence, effectively reducing the scrap rate.
  • the heating part is rod-shaped, and the heating assembly includes a driving part that drives the heating part to rise and fall vertically.
  • the heating part is suspended and inserted in the preform, so that the heating part is in contact with the inner side of the preform.
  • An anti-scald gap is formed between the walls.
  • the rod-shaped heating part can pass through the bottle mouth from top to bottom and be inserted in the preform to compensate and heat the preform.
  • the heating part is inserted into the preform and forms an anti-scald gap with the inner side wall of the preform, which effectively prevents the heating part from contacting the preform and causing local areas of the heating part to cause uneven thickness due to high temperature heat melting, which affects the product qualification rate. Ensure that the temperature of each area of the preform is balanced.
  • the heating part is inserted into the preform and synchronously falls into the blowing station.
  • the preform is first moved horizontally to the top of the mold assembly and then dropped to the blowing station.
  • the heating part is inserted into the preform. It also falls to the bottle blowing station synchronously with the preform, and uses the process of falling the preform to compensate and heat it. There is no need to reserve time for compensation heating.
  • the heating efficiency is improved by shortening the processing cycle, thereby increasing the output of the bottle blowing machine.
  • the preform is inserted and heated by the heating part after falling to the blowing station.
  • the heating part is inserted into the preform for compensation heating, and the blowing process is carried out after the compensation heating is completed, because the heating part is inserted in the static preform and reset after the compensation heating is completed , Give way to the blowing components, effectively reducing the difficulty of control.
  • the heating assembly includes a driving part, and the heating part is in the shape of a cover.
  • a channel is formed between the side mold plates, and the heating part driven by the driving part passes through the channel and is sleeved on the preform. On the bottom, so that the preform is compensated for heating.
  • the side mold plate separates away from the back and forms a channel for the heating part to move through.
  • the driving part drives the heating part into the channel so that the heating part is covered on the preform from bottom to top, and the preform is compensated by Heating to ensure that the temperature of the preform meets the requirements of stretch blow molding.
  • the mold assembly includes a bottom mold plate arranged below the bottle blowing station, and when the mold is opened, the side mold plate is separated from the bottom mold plate to form the channel.
  • the bottom mold plate and the side mold plate are tightly joined together to form a bottle blowing mold cavity for blowing the preform.
  • the side mold plate is separated from the back and forms the channel with the bottom mold plate. , It is convenient for the heating part to pass through.
  • the heating component is arranged below the mold component, and the driving part drives the heating part to be vertically lifted and sleeved on the preform.
  • the bottom mold plate moves horizontally and avoids the raised heating part, so that the heating part can be accurately placed on the bottom of the preform.
  • the heating assembly is arranged on the mold clamping direction side of the bottom mold plate and is linked with the bottom mold plate.
  • the heating assembly is driven by the bottom mold plate to move to the bottom of the bottle blowing station and pass through the driving part. Raise the heating part so that the heating part is sleeved on the preform.
  • the bottom mold plate moves horizontally and drives the heating assembly to move below the blowing station, so that the heating part can be placed on the bottom of the preform from bottom to top under the driving of the driving part.
  • the heating element is set higher than the bottom mold plate.
  • the driving part drives the heating part to move horizontally into the blowing station and then lifts and sets it on the preform, so that the preform is compensated and heated.
  • the bottom mold plate is separated from the back and forms a channel for the heating component to be inserted horizontally.
  • the heating component passes through the channel horizontally and moves to the space below the blowing station to ensure that the heating part can be driven from the bottom by the driving part.
  • the upper sleeve is placed on the bottom of the preform.
  • the injection molding mechanism is arranged in the middle of the frame
  • the blowing mechanism includes two mold components arranged on both sides of the frame
  • the conveying mechanism includes Huff components corresponding to the mold components one by one, respectively
  • the Huff component is matched and linked through the adapter frame.
  • the Huff component transports the preform between the injection station of the injection molding mechanism and the blowing station of the corresponding mold assembly.
  • the Huff components not only hold the preform, but also shape the mouth of the preform during injection molding.
  • the two sets of Hough components located at the two ends of the articulation frame alternately move to the injection molding mechanism to obtain the preforms, and transport them to the corresponding blowing mechanism for blowing operation.
  • the adapter frame drives the Huff components to match and link, so that the two sets of Huff components are misplaced and alternately perform injection molding and blowing operations, which not only ensures the continuous operation of the injection molding mechanism and the production efficiency of the injection molding mechanism, but also alternately blows through the blowing mechanism on both sides.
  • the manufacturing operation provides operating time for the bottle body to be removed from the mold assembly.
  • the injection molding mechanism includes an injection mold assembly
  • the injection mold assembly includes an upper mold plate and a lower mold plate that can be opened and closed vertically
  • the adapter frame is movably installed on the upper mold plate
  • the Huff component receives the preform at the injection molding mechanism, and after moving to the corresponding mold component, synchronously descends with the upper mold plate, so that the preform falls into the blowing station.
  • the upper mold plate is moved downwards Move and vertically clamp the corresponding Huff component with the lower mold plate.
  • the upper mold plate drives the Huff component down synchronously through the adapter frame, so that the preform falls into the blowing station, which is convenient for blowing the preform. ⁇ Operation.
  • the side of the frame is provided with at least two sets of mold components, and the side-mounted mold plate is switched for opening and closing along the translation direction of the articulation frame.
  • the side-mounted mold plate is switched for opening and closing along the translation direction of the articulation frame.
  • the mold assembly when the mold is closed, the mold assembly is enclosed to form at least two bottle blowing mold cavities that are independent of each other.
  • the heating assembly includes heating parts corresponding to each bottle blowing mold cavity on the corresponding mold assembly one by one to ensure that each preform can be compensated and heated to a preset temperature to meet stretch blowing requirements.
  • a heating assembly is provided on the frame, and the heating assembly is used to compensate and heat the preforms that are removed from the injection molding machine and before being blown into shape. Meet the processing temperature requirements before being blown, effectively avoid the preform being blown and scrapped due to lack of temperature and flexibility, improve the processing efficiency of the blow molding machine by reducing the number of scraps, and reduce the cost and cost of raw materials by saving raw materials , It also effectively uses the heat left in the injection molding process, effectively reduces the heat required for compensation heating, effectively reduces energy consumption, and reduces energy consumption costs.
  • Fig. 1 is a schematic diagram of the assembly structure of the heating assembly of the second embodiment.
  • Fig. 2 is a schematic diagram of the structure of the heating assembly in the third embodiment when it is in an idle state.
  • Fig. 3 is a schematic diagram of the structure of the heating assembly in the third embodiment when it is in a heating state.
  • Fig. 4 is a schematic diagram of the structure of the heating assembly in the fourth embodiment when it is in an idle state.
  • Fig. 5 is a schematic diagram of the structure of the heating assembly in the fourth embodiment when it is in a heating state.
  • Fig. 6 is a schematic diagram of a partial structure of the bottle blowing machine described in the seventh embodiment.
  • Fig. 7 is a schematic cross-sectional view of the bottle blowing machine described in the eighth embodiment.
  • Embodiment 1 This embodiment provides a bottle blowing machine for compensating heating of the preform.
  • the bottle blowing machine shown in Figures 1-6 is composed of a frame 1.
  • the frame 1 is provided with an injection molding mechanism, a blowing mechanism, and a conveying mechanism.
  • the blowing mechanism includes a mold assembly 2 and a mold assembly 2.
  • the matching bottle blowing assembly 3 is equipped with a bottle blowing station in the mold assembly 2, and the preform produced by the injection molding mechanism is moved into the bottle blowing station through the conveying mechanism and is blown and molded by the bottle blowing assembly 3, on the frame 1
  • a heating assembly 4 with a heating part 7 is provided, and the preform is moved away from the injection molding mechanism and receives heat from the heating part 7 before being blow molded, so that the temperature of the preform is increased by compensation heating.
  • a heating assembly 4 is provided on the frame 1, and the heating assembly 4 is used to compensate and heat the preforms that are removed from the injection molding machine and before being blown. This is to ensure that the preforms are heated before being blown. Meet the processing temperature requirements, effectively avoid the preform being blown and scrapped due to lack of temperature and flexibility, improve the processing efficiency of the blow molding machine by reducing the number of scraps, reduce the cost of raw materials by saving raw materials, and effectively use the injection molding process The remaining heat in the heat, effectively reducing the heat required for compensation heating, effectively reducing energy consumption, and reducing energy consumption costs.
  • the mold assembly 2 includes two side mold plates 5 that are parallel to each other and symmetrically arranged.
  • the mold assembly 2 can be in a closed state in which the side mold plates 5 are closed together and the side mold plates 5 Switch between the mold opening states of back separation.
  • the two side mold plates 5 are separated and form a channel for the heating part 7 to pass through.
  • the conveying mechanism drives the preform to fall into the position.
  • the blowing station between the side mold plates 5 is compensated and heated by the heating part 7.
  • the conveying mechanism includes a Huff assembly 12 corresponding to the mold assembly 2, and the Huff assembly 12 includes at least a pair of Huff clamps. Play the role of shaping, thereby forming preset threads or lines, and also play a role in clamping and transporting the preforms formed by injection molding.
  • the Huff clamp drives the preforms away from the injection molding mechanism by clamping the mouth of the bottle and transports it to the blowing Bottle agency.
  • the process of moving the preform from the injection molding mechanism to the blowing mechanism includes two stages. The first stage is that the Huff component 12 obtains the preform in the injection mechanism and moves it to the top of the blowing station. The second stage is the bottle. The preform moves vertically and drops and locates at the blowing station.
  • the preform is compensated and heated, which not only ensures that the temperature of each preform meets the requirements of stretch blowing, but also effectively reduces the difficulty of moving the heating part 7 for convenience.
  • the implementation of the operation and by shortening the time interval between compensation heating and blowing, prevents excessive heat dissipation and cooling due to the excessive time interval, ensures the yield of the blowing operation, and improves the processing efficiency.
  • the injection molding mechanism includes an injection molding assembly that includes an upper mold plate 10 and a lower mold plate 11 that can be opened and closed vertically, and the half clamp is in a ring shape, The middle part is provided with a clamping cavity for clamping the mouth of the bottle.
  • the bottom surface of the upper mold plate 10 is provided with an upper core
  • the top surface of the lower mold plate 11 is provided with a lower cavity.
  • the heating assembly 4 includes a heating part 7 and a driving part 8.
  • the heating part 7 is an electric heating element, which can continuously diffuse heat outward when it is energized, and the driving part 8 serves to drive the heating part 7
  • Switching between the heating station adjacent to the preform and the idle station moved away from the mold assembly 2 not only ensures that the heating part 7 can be inserted into the mold assembly 2 to compensate for heating of the preform, but also ensures that the heating part 7 can be switched to the idle station. Ensure that the mold assembly 2 opens and closes smoothly.
  • the driving part preferably adopts a cylinder structure, which not only facilitates assembly, but also ensures conveying accuracy.
  • Embodiment 2 Compared with Embodiment 1, this embodiment provides a specific structure of a bottle blowing machine.
  • the frame 1 includes a frame 6 that can move horizontally and reciprocally.
  • the heating assembly 4 and the bottle blowing assembly 3 are installed on the frame 6 in a vertical dislocation manner.
  • the heating assembly 4 and the bottle blowing assembly 3 alternate. Move to the top of the bottle blowing station to sequentially perform compensation heating and blow molding of the preform.
  • the heating assembly 4 and the bottle blowing assembly 3 are both arranged on the bracket 6, and the heating assembly 4 and the bottle blowing assembly 3 alternately appear above the bottle blowing station by driving the bracket 6 to reciprocate horizontally.
  • the heating part 7 is inserted into the preform and synchronously falls into the blowing station.
  • the preform is moved to the top of the bottle blowing station by the conveying mechanism, first, move the bracket 6 and make the heating assembly 4 move to the top of the bottle mouth, and then, the heating part 7 will pass through the bottle downward under the action of the driving part 8.
  • the mouth is inserted into the preform, and then, the preform is driven by the Huff assembly 12 to fall into the blowing station, and the heating part 7 is synchronized with the preform under the action of the driving part 8 to fall, so that the preform is in the process of falling.
  • the heating part is pulled up from the preform under the action of the driving part 8, and the blowing assembly 3 is moved to the top of the bottle mouth through the translation bracket 6, and the heating assembly is removed
  • the mold assembly 2 finally, the mold assembly 2 is closed and the bottle blowing assembly 3 is used to blow the preform to obtain a qualified finished product.
  • the timing of the preform falling into the blowing station is used to compensate the heating of the preform, and the processing efficiency is improved by shortening the processing time.
  • the heating part 7 is rod-shaped, and the heating assembly 4 includes a driving part 8 that drives the heating part 7 to rise and fall vertically.
  • the heating part 7 is suspended and inserted in the preform.
  • the driving part 8 is a cylinder that can be vertically retractable.
  • the driving part 8 drives the heating part up and down, which not only drives the heating part to be inserted into the preform, but also plays the role of synchronously descending with the preform, and also drives the heating part The role of pulling out the preform.
  • the heating part 7 is rod-shaped, so that the heating part can be vertically inserted in the preform, and a scald-proof gap is formed between the outer side wall of the heating part and the inner side wall of the preform.
  • the heating part and the inner wall of the preform are not in contact with each other, which not only prevents the preform from being liquefied and perforated due to excessive heating, but also uses the air medium in the anti-scalding gap to improve the uniformity of heat diffusion and ensure that each area of the preform is Heat evenly to prepare for stretch blowing operation.
  • a corresponding bracket 6 is provided above the mold assembly 2, and the bracket 6 realizes reciprocating translation under the drive of an air cylinder.
  • the moving direction of the bracket 6 is consistent with the opening and closing direction of the mold assembly 2. , By shortening the translation distance of the bracket 6 to improve the space utilization efficiency, thereby reducing the size of the equipment.
  • the structure that drives the bracket to move may also be a structure such as a motor screw, an oil cylinder, etc., which should also be regarded as a specific implementation of this embodiment.
  • the rack 1 is provided with a sliding rail for guiding the translation of the support 6 to ensure that the heating assembly 4 and the bottle blowing assembly 3 can be accurately moved to the top of the bottle blowing station alternately.
  • the bracket 6 is set higher than the half assembly 12, which not only ensures that the bracket 6 and the half assembly 12 do not interfere with each other during translation, but also ensures that the heating assembly 4 or the blowing assembly 3 can be vertically aligned with the preform. Corresponding to complete the compensation heating operation and blowing operation.
  • the depth at which the heating part 7 is inserted into the preform can be adjusted as required, so that the upper, middle, and lower sections of the preform can be separately heated as required to ensure that the preform
  • the temperature of each area meets the requirements of blowing, and it also effectively prevents the partial section of the preform from melting and damage due to overheating.
  • the preform can also be inserted and heated by the heating part 7 after falling to the bottle blowing station. Specifically, after the preform is dropped and positioned at the bottle blowing station, the preform is then heated by the heating part 7
  • Implementing compensation heating, and performing the blowing operation by switching the blowing assembly 3 after the compensation heating is completed, should also be regarded as a specific implementation of this embodiment.
  • Embodiment 3 Compared with Embodiment 1, this embodiment provides a specific structure of a bottle blowing machine.
  • the heating part 7 is in the shape of a hood.
  • a channel is formed between the side mold plates 5, and the heating part 7 driven by the driving part 8 passes through the channel and is sleeved on the preform.
  • the heating part 7 is provided with a heating cavity with an open top. When in use, the heating part 7 is sleeved on the bottom of the preform from bottom to top, so that the preform can complete compensation heating in the heating cavity.
  • the heating part 7 is sleeved on the bottom of the preform and falls into the bottle blowing station synchronously.
  • the heating part 7 moves below the bottle blowing station, and then the heating part 7 is sleeved from bottom to top under the action of the driving part 8
  • the preform is driven by the Huff assembly 12 to fall into the blowing station, and the heating part 7 is synchronized with the preform to fall under the action of the driving part 8, so that the preform is compensated and heated during the falling process.
  • the heating part is moved downward from the preform under the action of the driving part 8 and moved away from the mold assembly 2. Finally, the mold assembly 2 is closed and the blowing assembly 3 is used to pair the preform Perform blowing operations to obtain qualified finished products.
  • the timing of the preform falling into the blowing station is used to compensate the heating of the preform, and the processing efficiency is improved by shortening the processing time.
  • the side mold plates 5 move back to each other and form a channel for the heating part 7 to pass through, and the heating assembly 4 is arranged under the mold assembly 2, so that The heating part 7 can pass through the channel from bottom to top under the action of the driving part 8 and is sleeved on the preform.
  • the mold assembly 2 includes a bottom mold plate 9.
  • the side mold plate 5 is separated from the bottom mold plate 9 and forms the channel.
  • the bottom mold plate 9 is moved horizontally to avoid lifting
  • the heating part to ensure that the heating part can be smoothly sleeved on the preform should also be regarded as a specific implementation of this embodiment.
  • the extent to which the heating part 7 covers the preform can be adjusted as required, so that the upper, middle and lower parts of the preform can be compensated for heating as required, which ensures that the temperature of each area of the preform meets the requirements of blowing Bottle requirements also effectively prevent partial sections of the preform from melting and damage due to overheating.
  • the preform can also be heated by the heating part 7 after falling to the bottle blowing station. Specifically, after the preform is dropped and positioned at the bottle blowing station, the preform is then heated by the heating part 7
  • Implementing compensation heating, and performing the blowing operation through the blowing assembly 3 after the compensation heating is completed, should also be regarded as a specific implementation of this embodiment.
  • this embodiment provides another assembly structure of the heating assembly 4.
  • the heating assembly 4 is arranged on the side of the mold assembly 2. During the compensation heating operation, the heating assembly 4 first traverses the channel horizontally and moves to the bottom of the bottle blowing station, and then vertically lifts and combines Set on the bottom of the preform.
  • the heating assembly 4 is arranged on the mold clamping direction side of the bottom mold plate 9 and is linked with the bottom mold plate 9.
  • the heating assembly 4 is driven by the bottom mold plate 9 to move to the blowing station.
  • the heating part 7 is lifted by the driving part 8 underneath, so that the heating part 7 is sleeved on the preform.
  • the heating assembly 4 is provided on the side of the mold closing direction of the bottom mold plate 9.
  • the bottom mold plate 9 moves horizontally and drives the heating assembly 4 to move below the bottle blowing station, so that the heating part 7 can be nested by lifting The purpose on the bottom of the preform.
  • the frame 1 is provided with a guide rail for guiding the bottom mold plate 9 which is driven by the cylinder to slide along the guide rail, so that the heating assembly 4 moves to the blowing station when the mold is opened. Below, it is ensured that the heating part 7 can be placed on the preform by vertical lifting.
  • Embodiment 5 Compared with Embodiment 3, this embodiment provides another assembly structure of the heating component 4.
  • the heating element 4 is set higher than the bottom mold plate 9. After the mold is opened, the driving part 8 drives the heating part 7 to move horizontally into the blowing station and then lifts and sets it on the preform to make the bottle The billet is compensated for heating.
  • the height difference is used to form a space for the heating assembly 4 to pass laterally, so that the bottom mold plate 9
  • the mold can cooperate with the side-mounted mold plate 5 separated from the back to form a channel for the heating assembly 4 to traverse laterally, thereby eliminating the driving structure for driving the bottom-mounted mold plate 9 and reducing the production cost by simplifying the structure .
  • the driving part includes a horizontal driving cylinder and a vertical driving cylinder.
  • the heating part is translated under the action of the horizontal driving cylinder to the blowing station, and then is sleeved on the preform under the action of the vertical driving cylinder. .
  • Embodiment 6 Compared with Embodiment 2 and Embodiment 3, this embodiment provides another specific blow molding machine structure.
  • the bottle blowing machine includes a rod-shaped heating part and a cover-shaped heating part matched with each mold assembly 2.
  • the rod-shaped heating part passes through the bottle mouth and is inserted into the preform, and the cover-shaped heating part is sleeved on the preform from bottom to top, and the compensation is improved by increasing the area of the corresponding area between the preform and the heating component Heating efficiency, and then improve the processing efficiency by shortening the compensation heating time.
  • Embodiment 7 Compared with Embodiments 1 to 6, this embodiment provides another specific bottle blowing machine structure.
  • the injection molding mechanism is arranged in the middle of the frame 1, and the bottle blowing mechanism includes two mold assemblies 2 arranged on both sides of the frame 1.
  • the preforms processed by the injection molding mechanism are alternately transported by the conveying mechanism to the mold assemblies 2 on both sides for stretch-blowing operations, which not only ensures that the injection molding mechanism can continuously and cyclically form the preforms, but also ensures that the blowing mechanism can work in Exhaust the bottle in time during stretch blowing operation to prepare for the next blowing operation.
  • the articulation frame 13 can be installed translationally on the upper mold plate 10, and the Huff assembly 12 receives the preform at the injection mechanism and moves to the corresponding mold assembly 2 and then follows the upper mold assembly.
  • the mold plate 10 is lowered synchronously to make the preform fall into the blowing station.
  • the conveying mechanism includes the Huff components 12 corresponding to the mold components 2 one by one, and the Huff components 12 are matched and linked through the adapter frame 13.
  • the Huff components 12 are matched and linked through the adapter frame 13.
  • the half component 12 is two components, and they are separately arranged on the two ends of the connecting frame 13.
  • the two ends of the set adapter frame 13 are respectively provided with a No. 1 Huff assembly 12 and a No. 2 Huff assembly 12, and the mold assemblies 2 on both sides of the frame 1 are set as No. 1 mold assembly 2 and No. 2 mold assembly 2 respectively.
  • mold assembly 2 the blow molding machine is operating normally, taking a certain moment as the initial state as an example: assuming that mold assembly 2 completes the blowing operation and the injection molding assembly completes the injection molding operation, first, the injection mold The mold is opened, and the connecting plate is lifted upward under the drive of the upper mold plate 10, so that the first half assembly 12 drives the preform out of the injection molding cavity by clamping the mouth of the bottle.
  • the second half assembly 12 moves upward and Disengaged from the second mold assembly 2; after that, the adapter plate moves horizontally, so that the first half assembly 12 with the preform moves to the top of the first mold assembly 2, and at the same time, the second half assembly 12 moves to the upper mold plate 10 and The area between the lower mold plate 11; then, the injection mold assembly is closed, and the adapter plate is driven downward by the upper mold plate 10, so that the second half assembly 12 is moved by the upper mold plate 10 and the lower mold plate 11 Clamping to form the injection blow molding cavity, at the same time, the first half component 12 drives the preform down to the blowing station; finally, the injection molding mechanism performs injection molding on the injection blow molding cavity holding the second half component 12 In operation, the bottle blowing mechanism sequentially performs compensation heating and blowing operations on the preform carried by the No.
  • 1 Huff module 12 By alternately cyclically performing the above operations on the first half of the assembly 12 and the second half of the assembly 12, the first half of the assembly 12 and the second half of the assembly 12 are alternately moved to the injection molding mechanism to obtain the preforms, thereby achieving alternate conveying of bottles The blank is transferred to the corresponding mold assembly 2 to perform compensation heating operation and bottle blowing operation.
  • Embodiment 8 Compared with Embodiment 7, this embodiment provides another specific bottle blowing machine structure.
  • the opening and closing direction of the side template is consistent with the opening and closing direction of the mold assembly 2, which effectively reduces the arrangement space required by the mold assembly 2, and also facilitates the transportation of the preform between the injection molding mechanism and the blowing mechanism.
  • the end of the adapter frame 13 is provided with the Huff components 12 corresponding to the number of the single-sided mold components 2 of the frame 1, and the injection molding mechanism can be processed in a single process to meet the requirements of the single-sided mold assembly 2 of the frame 1
  • the preform required for the bottle improves the processing efficiency by increasing the number of single injection and blow molding.
  • Embodiment 9 Compared with Embodiments 1 to 8, this embodiment provides another specific structure of the bottle blowing machine.
  • the mold assembly 2 is provided with at least two blowing mold cavities. When the mold is closed, the mold assembly 2 is enclosed to form at least two independent blowing mold cavities.
  • the number of blowing mold cavities of component 2 increases the number of single blowing, which in turn improves the blowing efficiency.
  • the heating assembly 4 includes heating parts 7 corresponding to the number of blowing mold cavities, so that each preform can obtain compensation heating.

Abstract

L'invention concerne une machine de soufflage de bouteilles apte à un chauffage additionnel de préformes de bouteilles. La machine de soufflage de bouteilles comprend un bâti (1), un mécanisme de moulage par injection, un mécanisme de soufflage de bouteilles et un mécanisme de transport. Le mécanisme de soufflage de bouteilles comprend des ensembles moules (2) et des ensembles de soufflage de bouteilles (3) ; des stations de soufflage de bouteilles sont ménagées dans les ensembles moules (2), et des préformes de bouteilles produites par le mécanisme de moulage par injection sont déplacées vers les stations de soufflage de bouteilles au moyen du mécanisme de transport et moulées par soufflage par les ensembles de soufflage de bouteilles (3) ; des ensembles chauffants (4) sont ménagés sur le bâti (1) ; les préformes de bouteille sont déplacées à l'opposé du mécanisme de moulage par injection et reçoivent de la chaleur provenant de parties chauffantes (7) avant d'être moulées par soufflage, et ainsi la température des préformes de bouteilles est élevée au moyen d'un chauffage additionnel. En utilisant les ensembles chauffants (4) pour réaliser un chauffage supplémentaire sur les préformes de bouteille, il est garanti que les préformes de bouteille satisfont l'exigence de température de traitement, le rendement de qualification est amélioré, et en outre, un intervalle de temps entre moulage par injection et soufflage est raccourci, la consommation d'énergie est efficacement réduite, le coût de consommation d'énergie est réduit, l'aire de l'usine est diminuée et une pollution secondaire est évitée.
PCT/CN2020/133197 2020-01-09 2020-12-02 Machine de soufflage de bouteilles apte à un chauffage additionnel de préformes de bouteilles WO2021139453A1 (fr)

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CN114750398A (zh) * 2022-03-28 2022-07-15 台州市黄岩远大机械制造有限公司 塑料吹瓶机加热装置瓶坯内加热机构

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CN113580537B (zh) * 2021-07-07 2024-04-05 深圳市捷创新材料股份有限公司 一种具有壁厚均匀的吹出产品及制造装置
CN114619650A (zh) * 2022-03-01 2022-06-14 湖南千山制药机械股份有限公司 直线式注吹一体的塑料瓶成型设备

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