CN110919991A - Double-color injection mold with blade-changeable core-pulling assembly and working method thereof - Google Patents
Double-color injection mold with blade-changeable core-pulling assembly and working method thereof Download PDFInfo
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- CN110919991A CN110919991A CN201911390279.8A CN201911390279A CN110919991A CN 110919991 A CN110919991 A CN 110919991A CN 201911390279 A CN201911390279 A CN 201911390279A CN 110919991 A CN110919991 A CN 110919991A
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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
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
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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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/1628—The materials being injected at different moulding stations using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
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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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1676—Making multilayered or multicoloured articles using a soft material and a rigid material, e.g. making articles with a sealing part
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a double-color injection mold with a changeable blade core-pulling assembly, which comprises a front mold and a rear mold, wherein two groups of changeable core-pulling assemblies are symmetrically arranged at two ends of each rear mold cavity, each changeable core-pulling assembly comprises a hard glue core-pulling component and a soft glue core-pulling component, and the hard glue core-pulling components are arranged along the mold opening direction. One end of the hard rubber core pulling is provided with a hard rubber core pulling head, and the other end of the hard rubber core pulling head is provided with a hard rubber core pulling oil cylinder. The soft rubber loose core is positioned on one side of the hard rubber loose core, and the soft rubber loose core is obliquely arranged relative to the mold opening direction. One end of the flexible glue core pulling is provided with a flexible glue core pulling head, and the other end of the flexible glue core pulling head is provided with a flexible glue core pulling oil cylinder. The invention also discloses a working method of the double-color injection mold. According to the invention, the embedding of the soft rubber part into the hard rubber part is realized in a manner of alternatively ejecting the hard rubber and the soft rubber loose core. The oil circuit arrangement mode is reasonable, and the same oil circuit is shared in the loose core of the different groups of conversion loose core assemblies, and the synchronous cooperation simplifies the oil circuit structure, reduces the number of main oil circuits, has simpler and more convenient control on the loose core, and reduces the selection requirement on the injection molding machine.
Description
Technical Field
The invention relates to the technical field of injection molds, in particular to a double-color injection mold with a replaceable blade core pulling assembly and a working method thereof.
Background
The double-color injection mold is used for forming a double-color product piece with a hard glue part and a soft glue part combined into an integral structure, a rear mold of the double-color injection mold is provided with two rear mold cavities, a front mold of the double-color injection mold is provided with two front mold cores, and the two rear mold cavities can be respectively matched with the two front mold cores. The injection molding process of the double-color product piece is divided into two stages, firstly, a hard glue part 51 (shown in figure 1) is injection molded, the hard glue part is remained in a back mold after mold opening, the back mold is driven by an injection molding machine to rotate 180 degrees and then is matched with a front mold, a back mold cavity with the molded hard glue part is matched with another front mold core to form a soft injection molding cavity, and after soft glue is injected, the soft glue is combined with the hard glue part 51 molded in advance to form the double-color product piece (shown in figure 2).
The double-color product piece is composed of a hard glue part 51 and a soft glue part 52, wherein the soft glue part 52 is attached to the outer wall of the hard glue part 51 under the common condition, and the double-color product piece can be molded through injection molding at two sides. According to the needs of product, improve the combination firmness of soft glue part 52 and ebonite part 51, the local embedding that needs soft glue part 52 is in ebonite 51's inside, need have the caulking groove that can fill the soft glue in the ebonite part 51 of shaping earlier, when beating the soft glue, need the soft glue to fill in the caulking groove of the ebonite part 51 of shaping earlier, form required above-mentioned, current double-colored injection mold's structure can't realize the requirement of above-mentioned double-colored product spare. Therefore, the prior art is yet to be further improved.
Disclosure of Invention
In view of the defects of the prior art, one object of the invention is to provide a two-color injection mold with a changeable blade core pulling assembly, which solves the problem that the requirement that a soft rubber part of a two-color product piece is embedded into a hard rubber part cannot be met by the existing two-color injection mold.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the double-color injection mold with the conversion blade core pulling assembly comprises a front mold and a rear mold, wherein two front mold cores are arranged on the front mold, and a first rear mold cavity and a second rear mold cavity are arranged on the rear mold.
Two ends of each rear mold cavity are symmetrically provided with two groups of conversion core pulling assemblies, each conversion core pulling assembly comprises a hard glue core pulling assembly and a soft glue core pulling assembly, and the hard glue core pulling assemblies are arranged along the mold opening direction.
One end of the hard rubber core pulling close to the rear mold cavity is provided with a hard rubber core pulling head, one end of the hard rubber core pulling head far away from the rear mold cavity is provided with a hard rubber core pulling oil cylinder, and the hard rubber core pulling oil cylinder drives the hard rubber core pulling to move along the mold opening direction.
The soft rubber loose core is positioned on one side of the hard rubber loose core, and the soft rubber loose core is obliquely arranged relative to the mold opening direction.
The flexible glue is loosed core and is equipped with flexible glue core pulling head near the one end of back mould die cavity, and its one end of keeping away from back mould die cavity is equipped with the flexible glue hydro-cylinder of loosing core, and flexible glue hydro-cylinder drive flexible glue is loosed core and is followed the incline direction motion for the die sinking direction.
Furthermore, the conversion core pulling assembly comprises a hard glue locking core pulling device, and the hard glue locking core pulling device is positioned on one side of the hard glue core pulling device, which is far away from the soft glue core pulling device.
One end of the hard rubber locking loose core is matched with the hard rubber loose core in an inserting mode, and the other end of the hard rubber locking loose core is provided with a first locking oil cylinder.
Further, the hard glue locking loose core is arranged along the direction perpendicular to the mold opening direction.
The middle part of the hard rubber core is provided with a core-pulling jack, and the core-pulling jack is matched with one end of the hard rubber locking core-pulling.
The first locking oil cylinder can drive the hard rubber locking core-pulling motion to enable the end part of the first locking oil cylinder to be inserted into the core-pulling jack of the hard rubber core-pulling.
Furthermore, the conversion core pulling assembly further comprises a soft rubber locking core pulling device, and the soft rubber locking core pulling device is located on one side of the soft rubber core pulling device, which is far away from the hard rubber core pulling device.
One end of the soft rubber locking loose core is matched with the soft rubber loose core in an inserting mode, and the other end of the soft rubber locking loose core is provided with a second locking oil cylinder.
Furthermore, the soft glue locking loose core is arranged along the direction perpendicular to the mold opening direction.
The square notch is arranged at one end of the flexible glue locking loose core, and the slots are respectively arranged at two sides of the middle part of the flexible glue loose core.
The second locking oil cylinder can drive the soft rubber locking core pulling movement, so that the parts of the second locking oil cylinder, which are positioned at the two sides of the square notch, are inserted into the corresponding slots.
Furthermore, one side of each hard rubber core is provided with a stroke control mechanism, and one side of each soft rubber core is also provided with the same stroke control mechanism.
The stroke control mechanism comprises a driving rod, a collision block and two stroke switches, wherein one end of the driving rod is fixedly connected with the corresponding loose core, and the other end of the driving rod is fixedly connected with the collision block.
The two travel switches are arranged on the side wall of the rear die at intervals along the corresponding core-pulling motion direction, and the collision block is positioned between the two travel switches.
The oil passage structure further comprises four oil passages, namely a first oil passage, a second oil passage, a third oil passage and a fourth oil passage.
The first oil path simultaneously supplies oil and returns oil for two first locking oil cylinders corresponding to the first rear mold cavity and two second locking oil cylinders corresponding to the second rear mold cavity, and the second oil path simultaneously supplies oil and returns oil for two second locking oil cylinders corresponding to the first rear mold cavity and two first locking oil cylinders corresponding to the second rear mold cavity.
The third oil path simultaneously supplies oil and returns oil for two hard glue core-pulling oil cylinders corresponding to the first rear mold cavity and two soft glue core-pulling oil cylinders corresponding to the second rear mold cavity, and the fourth oil path simultaneously supplies oil and returns oil for two soft glue core-pulling oil cylinders corresponding to the first rear mold cavity and two hard glue core-pulling oil cylinders corresponding to the second rear mold cavity.
Furthermore, one end of the hard glue core pulling head and the corresponding hard glue core pulling are fixed into an integral structure, and one end of the soft glue core pulling head and the corresponding soft glue core pulling are fixed into an integral structure.
Another object of the present invention is to provide a method for operating the above-mentioned two-color injection mold with a replaceable blade core-pulling assembly.
The working method of the double-color injection mold with the replaceable blade core pulling assembly comprises the following steps:
in an initial state, the front mold and the rear mold are in a first mold closing state, and a first rear mold cavity is matched with one front mold core to form a hard glue injection molding cavity.
Before the front mold and the rear mold are closed for the first time, the two hard glue loose cores corresponding to the first rear mold cavity are ejected, one ends of the two hard glue locking loose cores corresponding to the first rear mold cavity are respectively inserted into the corresponding hard glue loose cores, and the corresponding hard glue loose cores are locked.
And step two, after the first die assembly, injecting hard glue into the hard glue injection cavity by the injection molding machine, and cooling the hard glue to form a hard glue part.
After the ebonite part is formed, the front die and the rear die are opened for the first time, the front die is fixed, the ebonite part is remained in the first rear die cavity and moves together with the rear die, and after the first die opening is finished, the rear die rotates 180 degrees.
After the back mould is rotated, the first back mould cavity and the hard glue part correspond to the other front mould core.
And step three, synchronously withdrawing the two hard glue locking loose cores corresponding to the first back mold cavity from the corresponding loose core jacks of the hard glue loose cores, and synchronously withdrawing the two hard glue loose cores corresponding to the first back mold cavity.
After the two soft rubber loose cores corresponding to the first rear mold cavity are synchronously ejected, the ends of the two soft rubber locking loose cores corresponding to the first rear mold cavity are respectively inserted into the corresponding slots of the soft rubber loose cores, and the corresponding soft rubber loose cores are locked.
And step four, after the front mold and the rear mold are closed for the second time, matching the first rear mold cavity, the hard glue part and the other front mold core to form a soft glue injection cavity, and driving soft glue into the soft glue injection cavity by the injection molding machine.
After the soft glue is cooled and formed, the soft glue and the hard glue part form a double-color product piece with an integral structure.
And fifthly, synchronously returning the two soft rubber locking loose cores corresponding to the first rear mold cavity, and then synchronously returning the two soft rubber locking loose cores corresponding to the first rear mold cavity.
And opening the front mold and the rear mold for the second time, enabling the two-color product piece to move together with the rear mold, and enabling an ejection system of the rear mold to act to eject the two-color product piece.
And sixthly, after the double-color product piece is ejected, two hard glue loose cores corresponding to the first rear mold cavity are ejected synchronously. And then, locking and ejecting the core pulling cores by two hard glue corresponding to the first rear mold cavity, inserting the end parts of the core pulling cores into the core pulling insertion holes of the corresponding hard glue core pulling cores to lock the core pulling cores, and returning to the initial state in the step one.
By adopting the technical scheme, the invention has the beneficial technical effects that: according to the invention, the hard glue part of the double-color product piece is molded by hard glue core pulling, and the soft glue part of the double-color product piece is molded by soft glue core pulling, so that the problem that the soft glue part is embedded into the hard glue part is solved by a mode of alternately ejecting the hard glue core pulling and the hard glue core pulling. The core pulling device has the advantages that the reasonable oil circuit arrangement mode is adopted, the core pulling of different groups of variable core pulling assemblies shares the same oil circuit, the core pulling is synchronously matched, the oil circuit structure and the number of main oil circuits are simplified, the core pulling is controlled more conveniently, the cost is lower, and the selection requirement on an injection molding machine is reduced.
Drawings
Fig. 1 is a partial structural schematic of a previously formed ebonite section as indicated in the background of the invention.
Fig. 2 is a partial structural schematic of a two-color product piece as indicated in the background.
Fig. 3 is a schematic structural principle diagram of the conversion core pulling assembly in a hard glue injection molding state.
Fig. 4 is a schematic structural principle diagram of the changeable core pulling assembly in a soft glue injection molding state.
Fig. 5 is a schematic diagram of a portion of the invention of fig. 3 showing the ebonite core and associated components.
Fig. 6 is a schematic structural view of a part of the invention shown in fig. 4, showing a soft glue core pulling and related components.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
embodiment 1, combine fig. 3 to 6, double-shot molding mould with alternate blade subassembly of loosing core, including front mould and back mould, front mould and back mould all set up on the injection molding machine, and the front mould is the cover half, and the back mould is the cover half. The front mould is provided with two front mould cores, the rear mould is provided with two rear mould cavities, namely a first rear mould cavity and a second rear mould cavity, and each front mould core can be matched with the first rear mould cavity and the second rear mould cavity. Two ends of each rear mold cavity are symmetrically provided with two groups of conversion core-pulling components, and each group of conversion core-pulling components is installed in the rear mold.
The conversion core-pulling assembly comprises a hard glue core-pulling 11 and a soft glue core-pulling 12, and the hard glue core-pulling 11 is arranged along the mold opening direction. One end of the hard glue core pulling 11 close to the rear mold cavity is provided with a hard glue core pulling head 13, one end of the hard glue core pulling head 13 and the corresponding hard glue core pulling 11 are fixed into an integral structure, and the end part of the hard glue core pulling head 13 can extend into the corresponding rear mold cavity. One end of the hard rubber core pulling 11, which is far away from the rear mold cavity, is provided with a hard rubber core pulling oil cylinder 31, and the hard rubber core pulling oil cylinder 31 drives the hard rubber core pulling 11 to move along the mold opening direction, so that the hard rubber core pulling 11 and the hard rubber core pulling head 13 are ejected and retracted.
The conversion core pulling assembly comprises a hard glue locking core pulling 21, the hard glue locking core pulling 21 is located on one side, away from the soft glue core pulling 12, of the hard glue core pulling 11, and the hard glue locking core pulling 21 is arranged in the direction perpendicular to the mold opening direction. One end fixed mounting of ebonite locking loose core 21 has plug 211, plug 211 is the wedge structure, and ebonite locking loose core 21 is through the plug 211 of its tip with the ebonite 11 cooperation of pegging graft, and ebonite locking loose core 21 other end disposes first locking cylinder 33, and the flexible end drive ebonite locking of first locking cylinder 33 loose core 21 ejecting or fall back along the die sinking direction of perpendicular to. When the hard glue core pulling 11 is in an ejecting state, the end part of the hard glue core pulling head 13 is positioned in the corresponding rear mold cavity, and the end part of the hard glue core pulling head 13 can enable the hard glue part to form a soft glue caulking groove.
The middle part of the hard glue core pulling 11 is provided with a core pulling jack with a conical structure, and the core pulling jack is matched with the plug 211 at one end of the hard glue locking core pulling 21. When the ebonite loose core 11 is in ejecting state, the plug 211 of ebonite locking loose core 21 one end is corresponding with the loose core jack of corresponding ebonite loose core 11 forward, and first locking cylinder 33 drive ebonite locking loose core 21 is to the ebonite loose core 11 motion, and the plug 211 of ebonite locking loose core 21 tip is for inserting in the loose core jack of ebonite loose core 11, pins the ebonite loose core 11, and the ebonite loose core 11 is pushed back to the pressure of ebonite when preventing that the ebonite from beating into ebonite injection molding chamber.
The soft rubber loose core 12 is positioned on one side of the hard rubber loose core 11, and the soft rubber loose core 12 is obliquely arranged relative to the mold opening direction. One end of the soft rubber core pulling 12 close to the rear mold cavity is provided with a soft rubber core pulling head 14, one end of the soft rubber core pulling head 14 and the corresponding soft rubber core pulling 12 are fixed into an integrated structure, and the end part of the soft rubber core pulling head 14 can extend into the corresponding rear mold cavity. One end of the soft rubber core pulling 12, which is far away from the rear mould cavity, is provided with a soft rubber core pulling oil cylinder 32, and the soft rubber core pulling oil cylinder 32 drives the soft rubber core pulling 12 to move along the inclined direction relative to the mould opening direction.
The conversion core-pulling assembly further comprises a soft rubber locking core-pulling 22, the soft rubber locking core-pulling 22 is positioned on one side, away from the hard rubber core-pulling 11, of the soft rubber core-pulling 12, and the soft rubber locking core-pulling 22 is arranged along the direction perpendicular to the mold opening direction. One end of the soft rubber locking loose core 22 is in plug fit with the soft rubber loose core 12, the other end of the soft rubber locking loose core is provided with a second locking oil cylinder 34, and the telescopic end of the second locking oil cylinder 34 drives the soft rubber locking loose core 22 to eject or retract along the direction perpendicular to the mold opening direction. The end of the hard rubber core-pulling head 13 is positioned in the corresponding rear mold cavity under the ejection state of the soft rubber core-pulling 11, and the end of the hard rubber core-pulling head 13 seals one side of the soft rubber caulking groove of the hard rubber part, so that the required double-color product is obtained after the soft rubber is injected and cooled and molded.
A square notch 221 is formed in one end of the soft rubber locking loose core 22, two opposite sides of the middle of the soft rubber loose core 12 are respectively provided with a slot 121, and the parts of the soft rubber locking loose core 22, which are located on two sides of the square notch 221, can be respectively matched with the slots 121 on two sides of the soft rubber loose core 12. The second locking cylinder 34 can drive the soft rubber locking loose core 22 to move, so that the parts of the soft rubber locking loose core 22 positioned at the two sides of the square notch 221 are inserted into the corresponding slots 121. When the flexible glue core 12 is in the ejecting state, the square notch 221 at the end of the flexible glue locking core 22 is in forward correspondence with the slot 121 at the middle of the flexible glue core 12, the second locking oil cylinder 34 drives the flexible glue locking core 22 to move towards the flexible glue core 12, the part of the flexible glue locking core 22 at the two sides of the square notch 221 is inserted into the slots 121 at the two sides of the flexible glue core 12, the flexible glue core 12 is locked, and the flexible glue core 12 is ejected back by the pressure of the flexible glue when the flexible glue is injected into the flexible glue injection cavity.
One side of each hard glue core-pulling 11 is provided with a stroke control mechanism 4, and one side of each soft glue core-pulling 12 is also provided with the same stroke control mechanism 4. The stroke control mechanism 4 comprises a driving rod 41, a collision block 42 and two travel switches 43, wherein one end of the driving rod 41 is fixedly connected with the corresponding loose core, and the other end of the driving rod is fixedly connected with the collision block 42. Two travel switches 43 are arranged on the side wall of the rear mold at intervals along the corresponding core pulling movement direction, and the striking block 42 is located between the two travel switches 43. The signal end of each travel switch 43 is electrically connected with the control system of the injection molding machine and is supplied with power by the power distribution system of the injection molding machine. Under the working state, each driving rod 41 and each collision block 42 move synchronously with the corresponding hard glue core-pulling 11 or soft glue core-pulling 12, and the collision blocks 42 are matched with the two travel switches 43 to control the travel of the hard glue core-pulling 11 or soft glue core-pulling 12.
The double-color injection mold with the blade conversion core pulling assembly further comprises four oil ways, namely a first oil way, a second oil way, a third oil way and a fourth oil way, wherein the four oil ways are respectively connected with a hydraulic station of the injection molding machine, and the hydraulic station can respectively supply oil and return oil for the four oil ways.
The two first locking oil cylinders 33 corresponding to the first rear mold cavity and the two second locking oil cylinders 34 corresponding to the second rear mold cavity are connected in parallel to form a whole and then are connected in series on a first oil path, and the first oil path simultaneously supplies oil and returns oil for the two first locking oil cylinders 33 corresponding to the first rear mold cavity and the two second locking oil cylinders 34 corresponding to the second rear mold cavity. The two second locking oil cylinders 34 corresponding to the first rear mold cavity and the two first locking oil cylinders 33 corresponding to the second rear mold cavity are connected in parallel to form a whole and then connected in series on a second oil path, and the second oil path simultaneously supplies oil and returns oil for the two second locking oil cylinders 34 corresponding to the first rear mold cavity and the two first locking oil cylinders 33 corresponding to the second rear mold cavity.
Two hard glue core-pulling oil cylinders 31 corresponding to the first rear mold cavity and two soft glue core-pulling oil cylinders 32 corresponding to the second rear mold cavity are connected in parallel to form a whole and then are connected in series on a third oil circuit, and the third oil circuit supplies oil and returns oil for the two hard glue core-pulling oil cylinders 31 corresponding to the first rear mold cavity and the two soft glue core-pulling oil cylinders 32 corresponding to the second rear mold cavity. And the oil supply and the oil return are simultaneously performed on two soft rubber core-pulling oil cylinders 32 corresponding to the first rear mold cavity and two hard rubber core-pulling oil cylinders 31 corresponding to the second rear mold cavity. Through the oil circuit arrangement mode, the oil circuit structure is greatly simplified, the limitation on the number of oil circuit ports of the injection molding machine is reduced, and the universality of equipment is improved.
The core pulling head of the double-color injection mold with the blade-changing core pulling assembly is also called a blade.
Embodiment 2, with reference to fig. 2 to 5, a working method of a two-color injection mold with a replaceable blade core pulling assembly includes the following steps:
in an initial state, the front mold and the rear mold are in a first mold closing state, and a first rear mold cavity is matched with one front mold core to form a hard glue injection molding cavity. The second rear mould cavity is matched with the other front mould core and the hard glue part formed in the second rear mould cavity in the previous procedure to form a soft glue injection mould cavity.
Before the front mold and the rear mold are closed for the first time, the two hard glue loose cores 11 corresponding to the first rear mold cavity are ejected, one ends of the two hard glue locking loose cores 21 corresponding to the first rear mold cavity are respectively inserted into the corresponding hard glue loose cores 11, and the corresponding hard glue loose cores 11 are locked. The two soft gum locking loose cores 12 corresponding to the first rear mold cavity are in a retreated state, and the two soft gum locking loose cores 22 corresponding to the first rear mold cavity are also in a retreated state.
Before the front mold and the rear mold are closed for the first time, the hard rubber product formed in the previous procedure is left in the second rear mold cavity, the two soft rubber loose cores 12 corresponding to the second rear mold cavity are ejected out, one ends of the two soft rubber locking loose cores 22 corresponding to the first rear mold cavity are respectively inserted into the corresponding soft rubber loose cores 12, and the corresponding soft rubber loose cores 12 are locked. The two hard glue core-pulling cores 11 corresponding to the first rear mold cavity are in a retreated state, and the two hard glue locking core-pulling cores 21 corresponding to the first rear mold cavity are also in a retreated state.
And step two, after the first die assembly, injecting hard glue into the hard glue injection cavity by the injection molding machine, and cooling the hard glue to form a hard glue part of the process. And (3) injecting soft rubber into the soft rubber injection cavity by the injection molding machine, combining the soft rubber with the hard rubber part of the previous procedure, and cooling to form a double-color product of the previous procedure.
The front mold and the rear mold are opened for the first time, the front mold is not moved, the hard rubber part of the procedure and the two-color product piece of the previous procedure move together, and after the first mold opening is completed, the ejection system of the rear mold acts to eject the two-color product piece of the previous procedure.
And then, the rear die rotates 180 degrees, after the rotation of the rear die is finished, the first rear die cavity and the hard glue part correspond to the other front die core, the first rear die cavity corresponds to one front die core, and secondary die assembly is prepared.
And step three, before the front mold and the rear mold are closed for the second time, after the two hard glue locking loose cores 21 corresponding to the first rear mold cavity synchronously withdraw from the corresponding loose core jacks of the hard glue loose cores 11, the two hard glue loose cores 11 corresponding to the first rear mold cavity synchronously withdraw.
Then, the two soft rubber core pulling 12 corresponding to the first back mold cavity are ejected out synchronously, the end parts of the two soft rubber locking core pulling 22 corresponding to the first back mold cavity are respectively inserted into the slots 121 of the corresponding soft rubber core pulling 12, and the corresponding soft rubber core pulling 12 is locked.
Before the front mold and the rear mold are closed for the second time, the two soft rubber locking loose cores 22 corresponding to the second rear mold cavity synchronously withdraw from the corresponding slots 121 of the soft rubber loose cores 12, and then the two soft rubber loose cores 12 corresponding to the first rear mold cavity synchronously withdraw.
Then, the two hard glue core-pulling cores 11 corresponding to the second back mold cavity are ejected synchronously, and the end parts of the two hard glue locking core-pulling cores 21 corresponding to the second back mold cavity are respectively inserted into the core-pulling insertion holes of the corresponding hard glue core-pulling cores 11 to lock the corresponding hard glue core-pulling cores 11.
And step four, after the front mold and the rear mold are closed for the second time, matching the first rear mold cavity, the hard glue part and the other front mold core to form a soft glue injection cavity, driving soft glue into the soft glue injection cavity by the injection molding machine, and forming a double-color product piece of the process with the hard glue part after the soft glue is cooled and formed. Meanwhile, the second rear mould cavity is matched with one of the front mould cores to form a hard glue injection cavity, hard glue is injected into the hard glue injection cavity by the injection machine, and after the hard glue is cooled and formed, a hard glue part of the next procedure is formed.
And step five, synchronously returning the two soft rubber locking loose cores 22 corresponding to the first rear mold cavity, and synchronously returning the two hard rubber locking loose cores 21 corresponding to the second rear mold cavity. Then, the two soft glue core-pulling cores 12 corresponding to the first back mold cavity are synchronously withdrawn, and the two hard glue core-pulling cores 11 corresponding to the second back mold cavity are synchronously withdrawn.
The front mould and the rear mould are opened for the second time, the two-color product piece of the procedure and the hard rubber part of the next procedure move together with the rear mould, the ejection system of the rear mould acts to eject the two-color product piece of the procedure, and the hard rubber part of the next procedure is remained in the rear mould.
And step six, after the double-color product piece in the process is ejected, two hard glue loose cores 11 corresponding to the first rear mold cavity are ejected synchronously, and meanwhile, two soft glue loose cores 12 corresponding to the second rear mold cavity are ejected synchronously. Subsequently, the two hard glue locking cores 21 corresponding to the first rear mold cavity are ejected out, the corresponding hard glue cores 11 are locked, and simultaneously, the two soft glue locking cores 22 corresponding to the second rear mold cavity are ejected out synchronously, and the corresponding soft glue cores 12 are locked. And (5) closing the front mold and the rear mold, and returning to the initial state of the first mold closing in the step one.
Parts which are not described in the invention can be realized by adopting or referring to the prior art.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (9)
1. The double-color injection mold with the replaceable blade core pulling assembly comprises a front mold and a rear mold, and is characterized in that two front mold cores are arranged on the front mold, and a first rear mold cavity and a second rear mold cavity are arranged on the rear mold;
two groups of conversion core-pulling assemblies are symmetrically arranged at two ends of each rear mold cavity, each conversion core-pulling assembly comprises a hard glue core-pulling and a soft glue core-pulling, and the hard glue core-pulling is arranged along the mold opening direction;
one end of the hard glue core pulling close to the rear die cavity is provided with a hard glue core pulling head, one end of the hard glue core pulling far away from the rear die cavity is provided with a hard glue core pulling oil cylinder, and the hard glue core pulling oil cylinder drives the hard glue core pulling to move along the die opening direction;
the soft rubber loose core is positioned on one side of the hard rubber loose core, and the soft rubber loose core is obliquely arranged relative to the mold opening direction;
the flexible glue is loosed core and is equipped with flexible glue core pulling head near the one end of back mould die cavity, and its one end of keeping away from back mould die cavity is equipped with the flexible glue hydro-cylinder of loosing core, and flexible glue hydro-cylinder drive flexible glue is loosed core and is followed the incline direction motion for the die sinking direction.
2. The two-color injection mold with the conversion blade core pulling assembly according to claim 1, wherein the conversion core pulling assembly comprises a hard glue locking core pulling device, and the hard glue locking core pulling device is positioned on one side of the hard glue core pulling device, which is far away from the soft glue core pulling device;
one end of the hard rubber locking loose core is matched with the hard rubber loose core in an inserting mode, and the other end of the hard rubber locking loose core is provided with a first locking oil cylinder.
3. The dual color injection mold with a translating blade core pulling assembly according to claim 2, wherein the ebonite locking core pulling is arranged perpendicular to the mold opening direction;
a core-pulling jack is formed in the middle of the hard rubber core pulling body and matched with one end of the hard rubber locking core pulling body;
the first locking oil cylinder can drive the hard rubber locking core-pulling motion to enable the end part of the first locking oil cylinder to be inserted into the core-pulling jack of the hard rubber core-pulling.
4. The two-color injection mold with the conversion blade core pulling assembly according to claim 2, wherein the conversion core pulling assembly further comprises a soft glue locking core pulling device, and the soft glue locking core pulling device is positioned on one side of the soft glue core pulling device, which is far away from the hard glue core pulling device;
one end of the soft rubber locking loose core is matched with the soft rubber loose core in an inserting mode, and the other end of the soft rubber locking loose core is provided with a second locking oil cylinder.
5. The two-color injection mold with the conversion blade core pulling assembly according to claim 4, wherein the soft glue locking cores are arranged along a direction perpendicular to the mold opening direction;
one end of the flexible glue locking loose core is provided with a square notch, and two sides of the middle part of the flexible glue loose core are respectively provided with an inserting groove;
the second locking oil cylinder can drive the soft rubber locking core pulling movement, so that the parts of the second locking oil cylinder, which are positioned at the two sides of the square notch, are inserted into the corresponding slots.
6. The two-color injection mold with the blade changing core pulling assembly according to claim 1, wherein a stroke control mechanism is arranged on one side of each hard glue core pulling, and the same stroke control mechanism is arranged on one side of each soft glue core pulling;
the stroke control mechanism comprises a driving rod, a collision block and two stroke switches, wherein one end of the driving rod is fixedly connected with the corresponding loose core, and the other end of the driving rod is fixedly connected with the collision block;
the two travel switches are arranged on the side wall of the rear die at intervals along the corresponding core-pulling motion direction, and the collision block is positioned between the two travel switches.
7. The double-color injection mold with the replaceable blade core pulling assembly according to any one of claim 4, further comprising four oil paths, namely a first oil path, a second oil path, a third oil path and a fourth oil path;
the first oil path simultaneously supplies oil and returns oil to two first locking oil cylinders corresponding to the first rear mold cavity and two second locking oil cylinders corresponding to the second rear mold cavity, and the second oil path simultaneously supplies oil and returns oil to two second locking oil cylinders corresponding to the first rear mold cavity and two first locking oil cylinders corresponding to the second rear mold cavity;
the third oil path simultaneously supplies oil and returns oil for two hard glue core-pulling oil cylinders corresponding to the first rear mold cavity and two soft glue core-pulling oil cylinders corresponding to the second rear mold cavity, and the fourth oil path simultaneously supplies oil and returns oil for two soft glue core-pulling oil cylinders corresponding to the first rear mold cavity and two hard glue core-pulling oil cylinders corresponding to the second rear mold cavity.
8. The two-color injection mold with the blade-replaceable core pulling assembly according to claim 1, wherein one end of the hard glue core pulling head is fixed with the corresponding hard glue core pulling head to form an integral structure, and one end of the soft glue core pulling head is fixed with the corresponding soft glue core pulling head to form an integral structure.
9. A method of operating a two-shot injection mold with a convertible blade core back assembly as claimed in any one of claims 1 to 8, comprising the steps of:
in an initial state, a front mold and a rear mold are in a first mold closing state, and a first rear mold cavity is matched with one front mold core to form a hard glue injection molding cavity;
before the front mold and the rear mold are closed for the first time, the two hard glue loose cores corresponding to the first rear mold cavity are ejected, one ends of the two hard glue locking loose cores corresponding to the first rear mold cavity are respectively inserted into the corresponding hard glue loose cores, and the corresponding hard glue loose cores are locked.
Step two, after the first die assembly, injecting hard glue into a hard glue injection cavity by an injection molding machine, and cooling the hard glue to form a hard glue part; after the ebonite part is formed, the front die and the rear die are opened for the first time, the front die is still, the ebonite part is left in the first rear die cavity and moves together with the rear die, and after the first die opening is finished, the rear die rotates 180 degrees;
after the rear die is rotated, the first rear die cavity and the hard glue part correspond to the other front die core;
step three, two hard glue locking loose cores corresponding to the first back mold cavity synchronously withdraw from the corresponding loose core jacks of the hard glue loose cores, and two hard glue loose cores corresponding to the first back mold cavity synchronously withdraw;
after the two soft rubber loose cores corresponding to the first rear mold cavity are synchronously ejected out, the ends of the two soft rubber locking loose cores corresponding to the first rear mold cavity are respectively inserted into the corresponding slots of the soft rubber loose cores, and the corresponding soft rubber loose cores are locked;
after the front mold and the rear mold are closed for the second time, matching the first rear mold cavity, the hard glue part and the other front mold core to form a soft glue injection cavity, and driving soft glue into the soft glue injection cavity by the injection molding machine;
after the soft glue is cooled and formed, a double-color product piece with an integral structure is formed with the hard glue part;
step five, synchronously returning two soft rubber locking loose cores corresponding to the first rear mold cavity, and then synchronously returning two soft rubber locking loose cores corresponding to the first rear mold cavity;
opening the front mold and the rear mold for the second time, enabling the two-color product piece to move together with the rear mold, and enabling an ejection system of the rear mold to act to eject the two-color product piece;
after the double-color product is ejected, two hard glue loose cores corresponding to the first rear mold cavity are ejected synchronously; and then, locking and ejecting the core pulling cores by two hard glue corresponding to the first rear mold cavity, inserting the end parts of the core pulling cores into the core pulling insertion holes of the corresponding hard glue core pulling cores to lock the core pulling cores, and returning to the initial state in the step one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390279.8A CN110919991B (en) | 2019-12-30 | 2019-12-30 | Double-color injection mold with changeable blade core-pulling assembly and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911390279.8A CN110919991B (en) | 2019-12-30 | 2019-12-30 | Double-color injection mold with changeable blade core-pulling assembly and working method thereof |
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| CN110919991B CN110919991B (en) | 2023-06-09 |
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| CN110919991B (en) | 2023-06-09 |
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