CN114103037A - Method and apparatus for making PET bottle preform with integral handle - Google Patents
Method and apparatus for making PET bottle preform with integral handle Download PDFInfo
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- CN114103037A CN114103037A CN202111395197.XA CN202111395197A CN114103037A CN 114103037 A CN114103037 A CN 114103037A CN 202111395197 A CN202111395197 A CN 202111395197A CN 114103037 A CN114103037 A CN 114103037A
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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
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
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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
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
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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
- 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
- B29C45/64—Mould opening, closing or clamping devices
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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
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a method and equipment for manufacturing a PET bottle preform with an integrated handle, which comprises an upper outer die unit, a lower outer die unit and an inner die unit, wherein the upper outer die unit and the lower outer die unit are oppositely arranged, the inner die unit is arranged between the upper outer die unit and the lower outer die unit, the side walls of the upper outer die unit and the lower outer die unit are respectively provided with a cooling unit, the bottom of the lower outer die unit is provided with a feeding unit, and the feeding units are respectively communicated with the inner die unit and the lower outer die unit through a material conveying unit. According to the invention, the injection molding piece is molded more uniformly by arranging the double injection molding ports and the discharge port and injecting the circulating injection molding material under negative pressure; the material conveying pipe is refined, the fluid state is improved by utilizing internal friction heat, and the water quality detection function is realized, so that the cooling effect is prevented from being influenced by the quality of the cooling liquid; the injection molding machine adopts a stepping motor and a synchronizer, uses a stepping screw for feeding, improves injection molding precision, is provided with a pressure sensor for adjusting injection molding pressure and speed, realizes sectional injection, and improves the quality of injection molding finished products.
Description
Technical Field
The invention relates to the technical field of PET bottle blank production, in particular to a method and equipment for manufacturing a PET bottle blank with an integrated handle.
Background
The existing integrated preform making machine capable of making the preform with the handle cannot make the preform by using PET plastic particles due to process reasons, and only can make the preform by using PC particles, and the PC particles are opaque particles.
The reason why the existing integrated preform making machine cannot make the bottle preform with the handle by using the PET material is generally low-temperature forming and is suitable for forming the PC material, the PET material needs higher forming temperature, the existing preform making machine is generally positive-pressure injection molding, hydraulic feeding and conventional liquid cooling are adopted, and poor injection molding parts caused by cooling effect and injection molding pressure precision occur, so that a manufacturing method of the PET bottle preform with the integrated handle and manufacturing equipment matched with the manufacturing method are needed.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a method and an apparatus for manufacturing a PET bottle preform having an integral handle.
The invention realizes the purpose through the following technical scheme:
the manufacturing equipment of the PET bottle preform with the integrated handle comprises an upper outer die unit, a lower outer die unit and an inner die unit, wherein the upper outer die unit and the lower outer die unit are arranged in opposite directions;
the inner mold unit comprises a mold core, a top cover and a sealing ring are arranged at the end part of the mold core, a plurality of through holes are distributed in the circumferential direction of the sealing ring, matched material distributing pipes are arranged on the end surface of the sealing ring corresponding to the through holes, a distributing pipe is arranged in the center of the top cover, the material distributing pipes, the distributing pipes and the through holes are mutually communicated, and a vibration motor is arranged on the inner side of the mold core and on the end surface of the top cover;
the feed unit includes workbin and cylinder body, the quantity of cylinder body is provided with two and every the output of cylinder body all with the workbin intercommunication, every the inside piston that all is provided with of cylinder body, the piston end face is provided with the screw rod, every there are two spacing framves that set up relatively on the screw rod outer wall, two relative settings still be provided with between the spacing framves with screw rod assorted double-screw bolt, every double-screw bolt one side all is provided with step motor, step motor with the double-screw bolt passes through chain drive and connects, the terminal surface is provided with the synchronizer under the bed die, the synchronizer respectively with two the step motor electricity is connected, the cylinder body the piston the screw rod spacing frame the double-screw bolt with step motor's quantity is two and follows the axis symmetry of workbin.
Preferably: the upper outer die unit comprises an upper die, an upper bottle blank cavity and an upper handle cavity are formed in the upper die, the lower outer die unit comprises a lower die, a lower bottle blank cavity and a lower handle cavity are formed in the lower die, the upper bottle blank cavity and the lower bottle blank cavity are correspondingly arranged to form the bottle blank cavity, the upper handle cavity and the lower handle cavity are correspondingly arranged to form the handle cavity, a first check block and a second check block which are matched with each other are respectively arranged on the upper handle cavity and the lower handle cavity, a feed inlet is formed in the end portion of the bottle blank cavity, and a discharge outlet is formed in one side of the handle cavity.
So set up, because the bottle embryo die cavity with the handle die cavity intercommunication forms the bottle embryo mould that has the integral type handle promptly, and adopts two side notes material modes to possess the discharge gate and provide the negative pressure environment, ensure that handle die cavity and bottle embryo die cavity all fill with the injection molding material.
Preferably: the matrix distribution is personally submitted to the bed die upper end and has four spacing holes, it corresponds to go up the mould lower extreme face spacing hole is provided with spacing post, is located the bed die up end is provided with compression cavity, runs through go up the mould and correspond compression cavity is provided with the air flue, it corresponds to go up the mould up end air compressor, the air flue with the vertical corresponding setting of compression cavity.
So set up, accomplish through spacing hole and spacing post to go up the mould with the vertical spacing of bed die, air compressor makes negative pressure environment in the compression cavity through the air flue, accomplish to go up the mould with the complete fixation of bed die.
Preferably: the cooling unit comprises a cooling liquid tank, a compression pump and a first cooling channel, the cooling liquid tank, the compression pump and the first cooling channel are communicated through a liquid conveying pipe, a liquid quality detection box is arranged between the cooling liquid tank and the compression pump, and the first cooling channel penetrates through the upper die and the lower die respectively;
the cooling unit further comprises a second cooling channel and a circulating pipe, the second cooling channel penetrates through the top cover, and the circulating pipe is arranged on the inner side of the mold core and communicated with the second cooling channel;
the cooling unit further comprises a third cooling channel, the third cooling channel is arranged on the inner sides of the first stop block and the second stop block respectively, and the third cooling channel is communicated with the infusion tube.
So set up, first cooling channel is parallel the bottle embryo die cavity runs through respectively go up the mould with the bed die sets up, accomplishes the quality control to the coolant liquid through liquid matter detection case, promotes the cooling effect, adopts the faster cooling shaping to the injection molding of completion of two cooling channels.
Preferably: the feeding unit comprises a feeding pipe and an electromagnetic valve, the electromagnetic valve is arranged at the input ends of the feeding hole and the shunt pipe, the input end of the feeding pipe is communicated with the output end of the material box, and the feeding pipe adopts a three-way connecting pipe and the output ends of the feeding pipe and the shunt pipe are respectively connected to the input end of the electromagnetic valve;
defeated material unit still includes the discharging pipe, the discharging pipe input corresponds the discharge gate setting, the discharging pipe output is connected to the cylinder body, the discharging pipe outer wall is provided with pressure sensor and force (forcing) pump, pressure sensor with the force (forcing) pump electricity is connected.
According to the arrangement, the injection molding precision is improved through the pressure sensor and the electromagnetic valve, the injection molding material is circulated through the discharge pipe and the pressure pump, air in the mold cavity is discharged circularly through the injection molding material, and the strength of the injection molding part is improved.
Preferably: the conveying pipeline is a high-temperature-resistant fiber pipe with the diameter of 40mm to 100mm, a sealing gasket is attached to the upper edge of the compression cavity, the limiting column is matched with the limiting hole, and the cylinder body is welded with the material box.
So set up, the conveying pipeline is refined, utilizes interior friction heat to promote the fluid state, promotes the air flue with compression cavity's seal strength, promotes the cylinder body with the joint strength of workbin.
The manufacturing method of the PET bottle blank with the integrated handle is characterized in that: the method comprises the following steps:
s1: assembling a plurality of elements included in the manufacturing equipment of the PET bottle blank with the integrated handle, and supplying power to the electronic elements in the manufacturing equipment by adopting an external power supply;
s2: injecting cooling liquid into the cooling liquid box, and detecting the quality of the cooling liquid in the cooling liquid box through the liquid quality detection box;
s3: the upper die and the lower die which are arranged on the upper outer die unit and the lower outer die unit are closed in opposite directions, the upper die and the lower die are limited through the limiting columns and the limiting holes, and the upper die and the lower die are further locked through the air compressor, the air passage and the compression cavity;
s4: adding injection molding materials into the material box and the cylinder body, and heating the injection molding materials by an external heater by using a radiation heating method;
s5; inserting a mold core into a bottle blank cavity formed by the upper mold and the lower mold, namely combining the bottle blank cavity and the handle cavity to form a bottle blank mold with an integrated handle;
s6: the step motor, the stud and the screw rod drive the piston to move, plastic is injected into the bottle blank cavity through the material conveying pipe and the electromagnetic valve in the material box, the pressurizing pump is connected with the material discharging pipe and the material discharging port to provide a negative pressure environment for the handle cavity, and high-temperature PET fluid circularly flows through the material conveying pipe, the bottle blank cavity, the handle cavity, the material discharging port, the material discharging pipe, the pressurizing pump and the material box to complete injection molding;
s7: starting a cooling unit, completing cooling forming of the injection molding bottle blank through a first cooling channel, a second cooling channel and a third cooling channel, starting a vibration motor, driving a mold core to vibrate, separating the mold core from the injection molding bottle blank, and taking out the mold core;
s8: and separating the upper die and the lower die, and taking out the bottle blank with the integrated handle.
Preferably: the cooling unit is communicated with the second cooling channel through a connecting pipe, and the stepping motor synchronously runs through a synchronizer and adopts a sectional type working mode.
So set up, adopt the sectional type injection, speed and pressure decrease progressively in proper order, promote the injection molding quality.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the double injection molding ports and the discharge port are arranged, the negative pressure suction is realized by the pressure pump through the discharge pipe and the discharge port, and the two-way injection molding is realized through the negative pressure suction and the positive pressure injection, so that the injection molding of an integrated bottle blank with a handle is more uniform;
2. according to the invention, the material conveying pipe is refined, the fluid state is improved by utilizing internal friction heat, so that the injection molding material fluid is kept in a high-temperature state, the injection molding of the PET material is completed, the liquid quality detection box is arranged to detect the liquid quality of the cooling liquid, the problem that the cooling effect is influenced by the quality of the cooling liquid, and further the injection molding piece finished product is poor is avoided, and the upper mold and the lower mold are tightly attached, so that burrs or uneven casting pressure generated in the injection molding piece molding process is avoided, and the injection molding quality is improved;
3. according to the invention, the stepping motor and the synchronizer are adopted, the stepping screw is used for feeding, the injection molding precision is improved, the pressure sensor is arranged for adjusting the injection molding pressure and speed, the sectional injection is realized, the finished product quality of the injection molded part is improved, the bottle blank cavity and the handle cavity are both provided with cooling channels, and the poor strength of the injection molded part caused by the uneven cooling rate of the bottle blank and the handle is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a first structural view of the apparatus for manufacturing PET bottle preforms with an integral handle according to the present invention;
FIG. 2 is a second structural view of the apparatus for manufacturing PET bottle preforms with an integral handle according to the present invention;
FIG. 3 is an isometric view of a core of an apparatus for making PET bottle preforms with integral handles according to the present invention;
FIG. 4 is a sectional view of the apparatus for manufacturing PET bottle preforms with an integral handle according to the present invention;
FIG. 5 is a bottom view of the apparatus for manufacturing PET bottle preforms with integral handles according to the present invention;
FIG. 6 is a structural view of a lower mold and a core of a manufacturing apparatus for PET bottle preforms with an integrated handle according to the present invention;
FIG. 7 is a sectional view of a core of the apparatus for manufacturing PET bottle preforms with an integral handle according to the present invention;
FIG. 8 is a structural view of a lower mold of a manufacturing apparatus of PET bottle preforms with an integral handle according to the present invention;
FIG. 9 is a sectional view of a third cooling channel of the apparatus for manufacturing PET bottle preforms with an integrated handle according to the present invention.
The reference numerals are explained below:
1. a lower die; 101-1, filling a bottle embryo cavity; 101-2, placing a bottle blank cavity; 102-1, an upper handle cavity; 102-2, a lower handle cavity; 103. a feed inlet; 104. a discharge port; 105. a limiting hole; 106. compressing the cavity; 107-1 and a first stop block; 107-2 and a second stop block; 2. an upper die; 201. a limiting column; 202. an air compressor; 203. an airway; 3. a core; 301. a seal ring; 302. distributing pipes; 303. a top cover; 304. a shunt tube; 305. a vibration motor; 306. a through hole; 4. a coolant tank; 401. a liquid quality detection box; 402. a compression pump; 403. a transfusion tube; 404. a first cooling channel; 405. a third cooling channel; 5. a second cooling channel; 501. a circulation pipe; 6. a delivery pipe; 601. an electromagnetic valve; 602. a discharge pipe; 603. a pressure pump; 604. a pressure sensor; 7. a material box; 701. a cylinder body; 702. a screw; 703. a limiting frame; 704. a stud; 705. a chain; 706. a stepping motor; 707. a synchronizer.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be further described with reference to the accompanying drawings in which:
referring to fig. 1-9, the apparatus for manufacturing PET bottle blanks with an integrated handle comprises an upper outer mold unit, a lower outer mold unit and an inner mold unit, wherein the upper outer mold unit and the lower outer mold unit are oppositely arranged, the inner mold unit is arranged between the upper outer mold unit and the lower outer mold unit, the upper outer mold unit and the lower outer mold unit are oppositely attached to form a bottle blank-shaped casting cavity, the side walls of the upper outer mold unit and the lower outer mold unit are respectively provided with a cooling unit, the cooling unit is used for rapidly cooling and molding injection molding materials, the bottom of the lower outer mold unit is provided with a feeding unit, the feeding unit is used for providing the injection molding materials in the cavities formed by the upper outer mold unit, the lower outer mold unit and the inner mold unit, and the feeding unit is respectively communicated with the inner mold unit, the upper outer mold unit and the lower outer mold unit through a material conveying unit;
the inner mold unit comprises a mold core 3, the mold core 3 is used for supporting an inner cavity of a bottle blank in the casting process, a top cover 303 and a sealing ring 301 are arranged at the end part of the mold core 3, the sealing ring 301 is arranged on the end surface of the top cover 303 in a fitting manner, the sealing ring 301 is concentric with the top cover 303, a plurality of through holes 306 are circumferentially distributed through the sealing ring 301, injection molding materials flow into the mold cavity from the plurality of through holes 306 which are uniformly distributed, the injection molding materials are uniformly and quickly conveyed due to the circumferential distribution of the through holes 306, the product quality is improved, a matched distributing pipe 302 is arranged on the end surface of the sealing ring 301 corresponding to the through holes 306, a distributing pipe 304 is arranged at the center of the top cover 303, the distributing pipe 302, the distributing pipe 304 and the through holes 306 are communicated, a vibration motor 305 is arranged on the inner side of the mold core 3 and on the end surface of the top cover 303, and the vibration motor is used for realizing quick demolding;
the feeding unit comprises a material box 7 and cylinder bodies 701, the number of the cylinder bodies 701 is two, the output ends of the cylinder bodies 701 are communicated with the material box 7, the cylinder bodies 701 are used for providing pressure for injection molding materials in the material box 7, pistons are arranged in each cylinder body 701, screw rods 702 are correspondingly arranged on the end faces of each piston, the screw rods 702 are used for providing displacement power for the pistons, two correspondingly arranged limiting frames 703 are respectively arranged on the outer wall of each screw rod 702, a stud 704 is arranged between the two limiting frames 703 for displacing the outer wall of one screw rod 702, the stud 704 is matched with the thread of the screw rod 702, the stud 704 is used for realizing transmission of a stepping motor 706 and the screw rod 702, a stepping motor 706 is arranged on one side of the stud 704 and on the end face of the lower die 1, the number of the stepping motors 706 is two and is respectively arranged corresponding to the two studs 704, and the stepping motor 706 is in transmission connection with the stud 705, the injection molding pressure precision is improved through the matching of the chain 705, the stud 704 and the stepping motor 706, the stud 704 is matched with the screw 702 in a threaded displacement mode, the stepping motor 706 is adopted to provide power, compared with a traditional hydraulic feeding mode, the injection molding pressure precision is obviously improved, the defect of finished injection molding parts caused by injection molding pressure difference is avoided, the lower end face of the lower die 1 is provided with the synchronizer 707, the synchronizer 707 has the effect of enabling the two stepping motors 706 to synchronously run, the synchronizer 707 is respectively and electrically connected with the two stepping motors 706, the cylinder body 701, the piston, the screw 702, the limiting frame 703, the stud 704 and the stepping motor 706 are all two and are symmetrically arranged along the axis of the material box 7, and the symmetrical structural arrangement is used for providing more stable pressure for the material box, so that the finished injection molding parts are more uniform, and the production quality is improved;
the lower outer mold unit comprises a lower mold 1, a lower bottle blank cavity 101-2 and a lower handle cavity 102-2 are arranged on the lower mold 1, the upper outer mold unit comprises an upper mold 2, an upper bottle blank cavity 101-1 and an upper handle cavity 102-1 are arranged on the upper mold 2, the upper bottle blank cavity 101-1 and the lower bottle blank cavity 101-2 are correspondingly arranged to form a bottle blank cavity, the upper handle cavity 102-1 and the lower handle cavity 102-2 are correspondingly arranged to form a handle cavity, a first stop block 107-1 and a second stop block 107-2 which are matched with each other are respectively arranged on the upper handle cavity 102-1 and the lower handle cavity 102-2, a feed inlet 103 is arranged at the end part of the bottle blank cavity, a discharge outlet 104 is arranged at one side of the handle cavity, a pressure pump 603 provides negative pressure suction to the discharge outlet 104 through a discharge pipe 602, namely the negative pressure suction is matched with positive pressure injection molding, the injection molding piece is more uniform, the phenomena of air holes and thin walls are avoided, and the production quality is effectively improved;
four limiting holes 105 are distributed on the upper end surface of the lower die 1 in a matrix manner, limiting columns 201 are arranged on the lower end surface of the upper die 2 corresponding to the limiting holes 105, the limiting holes 105 and the limiting columns 201 are used for realizing vertical limiting and positioning of the upper die 2 and the lower die 1, a compression cavity 106 is arranged on the upper end surface of the lower die 1, an air passage 203 penetrates through the upper die 2 and is arranged corresponding to the compression cavity 106, an air compressor 202 is arranged on the upper end surface of the upper die 2 corresponding to the air passage 203, the air passage 203 and the compression cavity 106 are vertically arranged in a corresponding manner, and the air compressor 202 is used for pumping air in the compression cavity 106 to provide a negative pressure environment in a working state, so that the upper die 2 and the lower die 1 are attached together more closely, and casting unevenness and burrs caused by gaps between the upper die and the lower die in a negative pressure casting process are effectively avoided;
the cooling unit comprises a cooling liquid tank 4, a compression pump 402 and a first cooling channel 404, the cooling liquid tank 4, the compression pump 402 and the first cooling channel 404 are communicated through a liquid conveying pipe 403, a liquid quality detection box 401 is arranged between the cooling liquid tank 4 and the compression pump 402, the liquid quality detection box 401 is used for detecting the quality of cooling liquid and avoiding the problem that the cooling rate is not uniform due to poor quality of the cooling liquid, so that the quality of a cast product is influenced, the first cooling channel 404 is respectively arranged through the upper die 2 and the lower die 1, specifically, the first cooling channel 404 is respectively arranged in the upper die 2 and the lower die 1 and is arranged outside the arc-shaped bottle blank cavity in parallel, and a plurality of first cooling channels 404 are circumferentially distributed outside the bottle blank cavity, so that the wrapping type cooling effect is better compared with the traditional cooling channel;
the cooling unit further comprises a second cooling channel 5 and a circulating pipe 501, the second cooling channel 5 penetrates through the top cover 303, the circulating pipe 501 is arranged on the inner side of the mold core 3 and is communicated with the second cooling channel 5, specifically, the circulating pipe 501 is spirally arranged on the inner side of the mold core 3, the length of the circulating pipe 501 is longer, compared with a straight pipe type, the cooling speed is higher, the cooling effect of the inner wall of the bottle blank is better for the round structure of the bottle blank, the double cooling channels for respectively arranging the first cooling channel 404 and the second cooling channel 5 are adopted, the cooling channels are arranged on the outer mold unit and the inner film unit, the cooling rate of the injection molding piece can be rapidly increased, the bottle blank main body and the handle can be cooled and molded technically, and the finished product quality of the injection molding piece is further improved;
the cooling unit further comprises a third cooling channel 405, the third cooling channel 405 is used for cooling the first stop block 107-1 and the second stop block 107-2, the third cooling channel 405 is circularly arranged inside the first stop block 107-1 and the second stop block 107-2 respectively, the handle and the bottle blank are kept to be cooled simultaneously, the problem that the strength of an injection molding part is low due to uneven cooling rate of the handle and the bottle blank is avoided, and the third cooling channel 405 is communicated with the infusion tube 403.
The material conveying unit comprises a material conveying pipe 6 and an electromagnetic valve 601, the electromagnetic valve 601 is arranged at the input ends of the feeding hole 103 and the flow dividing pipe 304, the input end of the material conveying pipe 6 is communicated with the output end of the material box 7, the material conveying pipe 6 adopts a three-way connecting pipe, the output ends of the three-way connecting pipe are respectively connected to the input ends of the electromagnetic valve 601, and the electromagnetic valve 601 is used for controlling the fluid speed of injection molding materials and avoiding the poor finished injection molding parts caused by the injection speed;
the material conveying unit further comprises a material outlet pipe 602, the input end of the material outlet pipe 602 is arranged corresponding to the material outlet 104, the output end of the material outlet pipe 602 is connected to the cylinder body 701, the outer wall of the material outlet pipe 602 is provided with a pressure sensor 604 and a pressure pump 603, and the pressure sensor 604 is electrically connected with the pressure pump 603.
The invention also comprises a method for manufacturing the PET bottle blank with the integrated handle, which comprises the following steps:
s1: assembling a plurality of elements included in the manufacturing equipment of the PET bottle blank with the integrated handle, and supplying power to the electronic elements in the manufacturing equipment by adopting an external power supply;
s2: injecting cooling liquid into the cooling liquid tank 4, and detecting the quality of the cooling liquid in the cooling liquid tank 4 through the liquid quality detection tank 401;
s3: closing an upper die 2 included by the upper external die unit and a lower die 1 included by the lower external film unit in opposite directions, limiting through a limiting column 201 and a limiting hole, and completing further locking of the upper die 2 and the lower die 1 through an air compressor 202, an air passage 203 and a compression cavity 106;
s4: adding injection molding materials into the material box 7 and the cylinder body 701, and heating the injection molding materials by an external heater by using a radiation heating method;
s5; inserting a mold core 3 into a bottle blank cavity formed by the upper mold 2 and the lower mold 1, namely combining the bottle blank cavity and the handle cavity to form a bottle blank mold with an integrated handle;
s6: the stepping motor 706, the stud 704 and the screw 702 drive the piston to move, plastic injected into the bin 7 is injected into the bottle blank cavity through the material conveying pipe 6 and the electromagnetic valve 601, the pressure pump 603 is connected with the material discharging pipe 602 and the material discharging hole 104 to provide a negative pressure environment for the handle cavity, and high-temperature PET fluid circularly flows through the material conveying pipe 403, the bottle blank cavity, the handle cavity, the material discharging hole 602, the material discharging pipe 602, the pressure pump 603 and the bin 7 to complete injection molding;
s7: starting a cooling unit, completing cooling forming of the injection molding bottle blank through a first cooling channel 404 and a second cooling channel 5, starting an oscillating motor 305, driving a mold core 3 to vibrate, separating the mold core 3 from the injection molding bottle blank, and taking out the mold core 3;
s8: the upper mold 2 and the lower mold 1 are separated, and the bottle preform having the integral handle is taken out.
Preferably: the injection molding precision is improved through the pressure sensor 604 and the electromagnetic valve 601, the pressure sensor 604 detects the fluid pressure, the electromagnetic valve 601 is further controlled to change the fluid speed, the injection stability is improved, the circulation of injection molding materials is completed through the discharge pipe 602 and the pressure pump 603, air in a mold cavity is discharged through the circulation of the injection molding materials, and the strength of an injection molding part is improved; the first cooling channel 404 is arranged in parallel with the bottle blank cavity and penetrates through the upper die 2 and the lower die 1 respectively, the quality inspection of cooling liquid is completed through the liquid quality detection box 401, the cooling effect is improved, and the cooling molding of the injection molding part is completed more quickly by adopting double cooling channels; the vertical limiting of the upper die 2 and the lower die 1 is completed through the limiting hole 105 and the limiting column 201, and the air compressor 202 creates a negative pressure environment in the compression cavity 106 through the air passage 203 to complete the complete fixation of the upper die 2 and the lower die 1; the bottle blank mold with the integrated handle is formed by communicating the bottle blank cavity with the handle cavity, a double-side material injection mode is adopted, and the discharge port 104 provides a negative pressure environment, so that the handle cavity and the bottle blank cavity are filled with injection molding materials; the delivery pipe 6 is a high-temperature resistant fiber pipe with the diameter of 40mm to 100mm, a sealing gasket is attached to the upper edge of the compression cavity 106, the limiting column 201 is matched with the limiting hole 105, the cylinder body 701 is welded with the material box 7, the delivery pipe 6 is refined, the fluid state is improved by utilizing internal friction heat, the sealing strength of the air channel 203 and the compression cavity 106 is improved, and the connection strength of the cylinder body 701 and the material box 7 is improved; the cooling unit is communicated with the second cooling channel 5 through a connecting pipe, the stepping motor 706 synchronously runs through the synchronizer 707 and adopts a sectional type working mode, sectional type injection is adopted, the speed and the pressure are sequentially reduced, and the quality of an injection molding part is improved.
The working principle is as follows: assembling a plurality of elements of the manufacturing equipment, supplying power to electronic elements in the manufacturing equipment by adopting an external power supply, injecting cooling liquid into a cooling liquid box 4, detecting the quality of the cooling liquid by a liquid quality detection box 401, closing an upper die 2 and a lower die 1 which are arranged in an external die unit oppositely, limiting by a limiting column 201 and a limiting hole 105, completing further locking of the upper die 2 and the lower die 1 by an air compressor 202, an air passage 203 and a compression cavity 106, adding injection molding materials into a material box 7 and a cylinder body 701, heating the injection molding materials by an external heater by using a radiation heating method, inserting a core 3 into a bottle blank cavity formed by the upper die 2 and the lower die 1, namely combining the bottle blank cavity and a handle cavity to form a bottle blank die with an integrated handle, driving a piston to displace by a stepping motor 706, a stud 704 and a screw 702, injecting plastic into the bottle blank cavity by a material conveying pipe 6 and an electromagnetic valve 601 in the material box 7, the pressure pump 603 is connected with the discharge pipe 602 and the discharge port 104 to provide a negative pressure environment for the handle cavity, injection molding is completed, the cooling unit is started, cooling molding of an injection molded bottle blank is completed through the first cooling channel 404 and the second cooling channel 5, the oscillation motor 305 is started, the separation of the molded core 3 and the injection molded bottle blank is completed, the core 3 is taken out, the upper mold 2 and the lower mold 1 are separated, the bottle blank with an integrated handle is taken out, the discharge port 104 with double injection molding ports is arranged, injection molding of injection molding parts is more uniform through negative pressure injection, the feed delivery pipe 6 is refined, the fluid state is improved by utilizing internal friction heat, the water quality detection function is realized, a stepping motor 706 and a synchronizer 707 are adopted to avoid the influence of cooling liquid quality on the cooling effect, the material is fed by using a stepping screw 702, the injection molding precision is improved, the injection molding pressure and the injection speed are adjusted by arranging a pressure sensor 604, the opening and closing of the electromagnetic valve 601 are controlled by the pressure sensor 604, realize the sectional type injection, promote injection molding finished product quality.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. The equipment for manufacturing the PET bottle blank with the integrated handle comprises an upper outer die unit, a lower outer die unit and an inner die unit, and is characterized in that: the upper outer die unit and the lower outer die unit are arranged in opposite directions, the inner die unit is arranged between the upper outer die unit and the lower outer die unit, cooling units are arranged on the side walls of the upper outer die unit and the lower outer die unit, a feeding unit is arranged at the bottom of the lower outer die unit, and the feeding unit is respectively communicated with the inner die unit and the lower outer die unit through a material conveying unit;
the inner die unit comprises a die core (3), a top cover (303) and a sealing ring (301) are arranged at the end part of the die core (3), a plurality of through holes (306) are circumferentially distributed through the sealing ring (301), a matched material distributing pipe (302) is arranged on the end surface of the sealing ring (301) corresponding to the through holes (306), a distributing pipe (304) is arranged at the center of the top cover (303), the material distributing pipe (302), the distributing pipe (304) and the through holes (306) are mutually communicated, and a vibration motor (305) is arranged on the inner side of the die core (3) and on the end surface of the top cover (303);
the feed unit includes workbin (7) and two cylinder body (701), every the output of cylinder body (701) all with workbin (7) intercommunication, every cylinder body (701) inside all is provided with piston and screw rod (702), every all be provided with spacing (703) of two relative settings on screw rod (702) outer wall, two relative settings still be provided with between spacing (703) with screw rod (702) assorted double-screw bolt (704), every double-screw bolt (704) one side all is provided with step motor (706), step motor (706) with double-screw bolt (704) are connected through chain (705) transmission, two be provided with synchronizer (707) between step motor (706).
2. The apparatus for manufacturing PET bottle preforms with integral handles as claimed in claim 1, wherein: the upper outer die unit comprises an upper die (2), an upper bottle blank cavity (101-1) and an upper handle cavity (102-1) are arranged on the upper die (2), the lower outer die unit comprises a lower die (1), a lower bottle blank cavity (101-2) and a lower handle cavity (102-2) are arranged on the lower die (1), the upper bottle blank cavity (101-1) and the lower bottle blank cavity (101-2) are correspondingly arranged to form a bottle blank cavity, the upper handle cavity (102-1) and the lower handle cavity (102-2) are correspondingly arranged to form a handle cavity, a first stop block (107-1) and a second stop block (107-2) which are matched with each other are respectively arranged on the upper handle cavity (102-1) and the lower handle cavity (102-2), and a feed port (103) is arranged at the end part of the bottle blank cavity, and a discharge hole (104) is formed in one side of the handle cavity.
3. The apparatus for manufacturing PET bottle preforms with integral handles as claimed in claim 2, wherein: the upper end face of the lower die (1) is provided with limiting holes (105) in a matrix distribution mode, the lower end face of the upper die (2) corresponds to the limiting holes (105) and is provided with limiting columns (201), the upper end face of the lower die (1) is provided with a compression cavity (106) and runs through the upper die (2) and is provided with an air passage (203), the upper end face of the upper die (2) is provided with an air compressor (202), and the air passage (203) and the compression cavity (106) are vertically arranged in a corresponding mode.
4. The apparatus for manufacturing PET bottle preforms with integral handles as claimed in claim 1 or 2, wherein: the cooling unit comprises a cooling liquid tank (4), a compression pump (402) and a first cooling channel (404), the cooling liquid tank (4), the compression pump (402) and the first cooling channel (404) are communicated through a liquid conveying pipe (403), a liquid quality detection box (401) is arranged between the cooling liquid tank (4) and the compression pump (402), and the first cooling channel (404) is respectively arranged on the inner sides of the upper die (2) and the lower die (1);
the cooling unit further comprises a second cooling channel (5) and a circulating pipe (501), the second cooling channel (5) penetrates through the top cover (303), and the circulating pipe (501) is arranged on the inner side of the mold core (3) and communicated with the second cooling channel (5)
The cooling unit further comprises a third cooling channel (405), the third cooling channel (405) is arranged on the inner sides of the first stopper (107-1) and the second stopper (107-2) respectively, and the third cooling channel (405) is communicated with the infusion tube (403).
5. The apparatus for manufacturing PET bottle preforms with integral handles as claimed in claim 1 or 2, wherein: the material conveying unit comprises a material conveying pipe (6) and an electromagnetic valve (601) which are communicated, the electromagnetic valve (601) is arranged at the input ends of the material inlet (103) and the flow dividing pipe (304), and the input end of the material conveying pipe (6) is communicated with the output end of the material box (7);
the material conveying unit further comprises a material outlet pipe (602), the material outlet pipe (602) is respectively connected with the material outlet (104) and the cylinder body (701), and the outer wall of the material outlet pipe (602) is provided with a pressure sensor (604) and a pressure pump (603).
6. The apparatus for manufacturing PET bottle preforms with integral handles as claimed in claim 5, wherein: the conveying pipeline (6) is a high-temperature-resistant fiber pipe with the diameter ranging from 40mm to 100mm, a sealing gasket is attached to the upper edge of the compression cavity (106), and the limiting column (201) is matched with the limiting hole (105).
7. The manufacturing method of the PET bottle blank with the integrated handle is characterized in that: the method for preparing the PET bottle preform with the integral handle according to claim 5, comprising the steps of:
s1: assembling a plurality of elements included in the manufacturing equipment of the PET bottle blank with the integrated handle, and supplying power to the electronic elements in the manufacturing equipment by adopting an external power supply;
injecting cooling liquid into the cooling liquid box (4), and detecting the quality of the cooling liquid in the cooling liquid box (4) through the liquid quality detection box (401);
adding PET injection molding materials into the material box (7) and the cylinder body (701), and heating the injection molding materials by an external heater by using a radiation heating method;
s2: closing an upper die (2) included by the upper external die unit and a lower die (1) included by the lower external die unit, and locking the upper die (2) and the lower die (1) through an air compressor (202), an air passage (203) and a compression cavity (106);
s3; inserting a mold core (3) into a bottle blank cavity formed by the upper mold (2) and the lower mold (1), namely combining the bottle blank cavity and a handle cavity to form a bottle blank mold with an integrated handle;
s4: the stepping motor (706), the stud (704) and the screw (702) drive the piston to move, plastic is injected into the bottle blank cavity of the material box (7) through the material conveying pipe (403) and the electromagnetic valve (601), the pressure pump (603) is connected with the material discharging pipe (602) and the material discharging hole (104) to provide a negative pressure environment for the handle cavity, and high-temperature PET fluid circularly flows through the material conveying pipe (403), the bottle blank cavity, the handle cavity, the material discharging hole (602), the material discharging pipe (602), the pressure pump (603) and the material box (7) to complete injection molding;
s5: the cooling unit is started, the cooling forming of the injection molding bottle blank is completed through the first cooling channel (404), the second cooling channel (5) and the third cooling channel (405), the vibration motor is started, the core (3) is driven to vibrate, the core (3) is separated from the injection molding bottle blank, the core (3) is taken out, and the separation is performed on the upper die (2) and the lower die (1), and the bottle blank with the integrated handle is taken out.
8. The method for manufacturing a PET bottle preform with an integral handle as set forth in claim 7, wherein: the cooling unit is communicated with the second cooling channel (5) through a connecting pipe, and the stepping motor (706) synchronously runs through a synchronizer (707) and adopts a sectional type working mode.
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| CN114103037B (en) | 2023-04-07 |
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