CN111452300A - Rotary core type pressure injection double-color injection mold and injection molding method - Google Patents
Rotary core type pressure injection double-color injection mold and injection molding method Download PDFInfo
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- CN111452300A CN111452300A CN202010295298.9A CN202010295298A CN111452300A CN 111452300 A CN111452300 A CN 111452300A CN 202010295298 A CN202010295298 A CN 202010295298A CN 111452300 A CN111452300 A CN 111452300A
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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
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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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
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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
- B29C45/03—Injection moulding apparatus
-
- 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
- B29C45/03—Injection moulding apparatus
- B29C45/12—Injection moulding apparatus using two or more fixed moulds, e.g. in tandem
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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
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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
- B29C45/1703—Introducing an auxiliary fluid into the mould
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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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1734—Nozzles therefor
- B29C45/1735—Nozzles for introducing the fluid through the mould gate, e.g. incorporated in the injection nozzle
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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
- B29C45/1756—Handling of moulds or mould parts, e.g. mould exchanging means
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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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
- B29C2045/173—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using a plurality of fluid injection nozzles
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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 rotary core type pressure injection double-color injection mold which comprises a double-color injection mold assembly, a fixed mold, a movable mold, an injection pressure mechanism and an injection cavity, wherein the fixed mold is connected with the injection cavity, the double-color injection mold assembly for communicating the fixed mold and the injection cavity is arranged between the fixed mold and the injection cavity, the movable mold and the fixed mold are matched to form an injection space, and the injection pressure mechanism is arranged on one side of the fixed mold, which is far away from the movable mold. The invention aims to provide a rotary core type pressure injection double-color injection mold which can improve the welding precision of double-color plastics and reduce defective products. The invention also provides an injection molding method of the rotary core type pressure injection double-color injection mold.
Description
Technical Field
The invention belongs to the field of plastic processing, and particularly relates to a rotary core type pressure injection double-color injection mold and an injection molding method.
Background
With the rapid development of the economic society, plastic products occupy various fields of people's life and industrial supplies with various advantages, the plastic products and related industries are developed vigorously, related plastic manufacturing and molding technologies are continuously improved and rapidly developed, and the double-color injection molding technology is a new plastic manufacturing and molding technology which is rapidly developed under the wave.
The two-color injection molding technology is also called as a two-material injection molding technology, and is a technology for forming a plastic product by mixing and injecting two plastic materials, and the technical connotation is that a mold component is actually used for molding the shape and welding the molding work in a mold, so that the most fundamental principle is to plasticize and mold two different plastic raw materials and then weld and install the two different plastic raw materials by using the mold so as to achieve the purpose of two-color injection molding.
The core rotating type double-color injection molding technology is also called as rotary mold core double-color injection molding technology, and the technical principle is that first raw material plastic is injected by an injection device and is injected into a small hole of a mold, the first plastic is formed after the first plastic is molded, then the mold is rotated by 180 degrees, second raw material plastic is injected by the same injection device, and after the second plastic is molded, the final encapsulation work is carried out, and the most basic double-color injection molding work is completed.
The invention with the publication number of CN108381857A discloses a novel double-color injection molding device, which structurally comprises an injection molding device main machine body, a cooling device auxiliary water tank, a double-color injection molding transmission case and an injection molding cooling transmission case, wherein the double-color injection molding transmission case is provided with a coloring mixing device, a color master raw material heating device, a coloring mixing device control gear set and a coloring mixing device supporting mechanism, the circulating water cooling device is provided with a first cooling water condensation pipe, a second cooling water condensation pipe, a first transmission traction line, a first water return water baffle plate, a water return water outlet, a first transmission small pulley, a third cooling water condensation pipe, a second transmission traction line, a first water inlet water baffle plate and a second transmission small pulley, when the device is used, a motor and a water pump of the double-color injection molding device can be increased to accelerate the injection and cooling speed, and the feeding speed can be accelerated through a large-diameter material mixing screw rod, a series of work synchronously carries out compound action, shortens the forming time, and improves the problem of poor stability of a rotating structure.
The technical scheme also has the following technical defects: if the injection pressure in two sets of equipment is inconsistent, can make the plastic products who moulds plastics out merge and the welded process has the flaw to influenced plastic products's welding precision, and when double-colored moulding plastics, often can adopt two kinds of densities, the material that the performance is different, just more likely lead to two kinds of plastics can not weld together, influence this plastic products's subsequent use, failure rate in the generation process will be mentioned, can waste and hang down the material excessively.
Disclosure of Invention
The invention aims to provide a rotary core type pressure injection double-color injection mold which can improve the welding precision of double-color plastics and reduce defective products by controlling injection pressure.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a double-colored injection mould of rotary core formula pressure injection, includes double-colored injection mould assembly, cover half mould, movable mould, injection pressure mechanism, the cavity of moulding plastics, the cover half mould with the cavity of moulding plastics is connected, be equipped with the double-colored injection mould assembly that is used for communicateing cover half mould and the cavity of moulding plastics between cover half mould and the cavity of moulding plastics, movable mould and cover half mould cooperation form the space of moulding plastics, just one side that the movable mould was kept away from to the cover half mould is equipped with injection pressure mechanism.
The injection pressure mechanism is connected with the fixed die through the injection pressure air inlet plate, the injection pressure mechanism comprises a first injection pressure mechanism and a second injection pressure mechanism, the first injection pressure mechanism and the second injection pressure mechanism are connected with the injection pressure air inlet plate through the injection pressure sliding mechanism, the top ends of the first injection pressure mechanism and the second injection pressure mechanism are connected with the injection pressure air inlet plate, the injection pressure sliding mechanism comprises a pressure sliding plate and a limiting plate, the pressure sliding plate is provided with a first sliding hole for the first injection pressure mechanism to pass through and a second sliding hole for the second injection pressure mechanism to pass through, the limiting plate is provided with two stepped holes which are through holes, and the tail ends of the first injection pressure mechanism and the second injection pressure mechanism are respectively arranged in the two stepped holes of the limiting plate, the pressure sliding plate is connected with the limiting plate through a limiting clamp key.
In the generation of the double-color plastic in the prior art, two sets of matched fixed mold dies and movable mold dies are usually adopted for manufacturing, but if the raw material temperature, the injection pressure and the injection rate in the two sets of equipment are inconsistent, the fusion and welding processes of the plastic products which are injected can have defects, and the raw material temperature, the injection pressure and the injection rate are inevitably different in the injection process, so that the welding precision of the plastic products is influenced, and in the double-color injection molding, two materials with different densities and performances are often adopted, so that the two plastics can be more likely to be incapable of being welded together, the subsequent use of the plastic products is influenced, the failure rate in the generation process can be increased, too low materials can be wasted, and the injection pressure mechanism is arranged on the left side of the fixed mold die, so that the defects in the fusion and welding processes of the plastic products can be avoided by controlling the injection pressure, when the injection molding machine is used for injection molding for the first time, the first color is injected, the movable mold and the fixed mold are matched, the phenomenon that the pressure in the cavity in the movable mold and the fixed mold is too large is avoided, the injection pressure mechanism does not apply pressure to the cavity, the second color is injected when the injection molding machine is used for injection molding for the second time, and when the movable mold and the second fixed mold are matched, the injection pressure mechanism applies pressure to the cavity, so that the molten plastics with the two colors can be pressed and welded together.
Further, the number of the limiting blocking keys is two, the two limiting blocking keys are respectively a first limiting blocking key and a second limiting blocking key, one ends of the first limiting blocking key and one end of the second limiting blocking key are respectively blocked in a first sliding hole and a second sliding hole of the pressure sliding plate, the other ends of the first limiting blocking key and the second limiting blocking key are respectively blocked in two stepped holes of the limiting plate, through holes are formed in the first limiting blocking key and the second limiting blocking key, the first injection pressure mechanism and the second injection pressure mechanism respectively penetrate through the through holes of the first limiting blocking key and the second limiting blocking key, the first limiting blocking key limits free movement of the first injection pressure mechanism, and the second limiting blocking key limits free movement of the second injection pressure mechanism.
Further, one side of injection pressure air inlet plate is connected with the cover half mould, the opposite side of injection pressure air inlet plate is equipped with two pressure air inlets, is first pressure air inlet and second pressure air inlet respectively, be equipped with injection pipeline on the pressure sliding plate, injection pipeline includes first injection pipeline under pressure and second injection pipeline under pressure, and first injection pipeline under pressure and second injection pipeline under pressure's one end respectively with first pressure air inlet and second pressure air inlet detachable connection, first injection pipeline under pressure and second injection pipeline under pressure's the other end is connected with injection pressure nozzle respectively, just injection pressure nozzle is connected with injection pipeline under pressure detachable.
When the injection molding is carried out, the injection pressure and the injection rate of the two molds can be adjusted in a consistent way, the injection pressure and the injection speed of the two molds are not consistent, so that the process of fusing and welding the injection-molded plastic products has defects, in the injection molding process, under a large injection molding pressure, during the second injection molding, the plastic of the product which is molded at the first time is deformed, so that the second injection molding may have a possibility of generating burrs, the pressure sliding plate and the limiting plate are connected through the limiting clamp key, the bottom of the injection pressure mechanism is clamped by the tail end of the limiting clamp key, when the pressure sliding plate moves up and down, due to the action of the limiting clamp key, the limiting plate moves synchronously along with the pressure sliding plate, up-and-down movement of the injection pressure mechanism is realized, extrusion or expansion of gas in the injection pressure mechanism is realized, and the pressure change of the gas in the injection pressure mechanism is similar to the pressure change of the cylinder and the piston of the cylinder during movement.
And the injection pressure nozzle is detachably connected with the injection pressure pipeline, so that the injection pressure nozzle is convenient to be externally connected with the pressure conveying pipeline, the pressure conveying pipeline is convenient to clean, and the injection pressure nozzle is prevented from being blocked.
Further, the ends of the first injection pressure mechanism and the second injection pressure mechanism are provided with melt shut-off valves.
When the mold is closed, the melt shut-off valve is closed, on one hand, melt backflow is prevented, and on the other hand, the injection pressure is maintained through a closed environment, and the huge resistance of the melt flowing in the mold is overcome. When injection molding is carried out, the pressure for injection needs to be kept larger, not only because two different plastic raw materials are used, the two plastic raw materials need to be fused by strong pressure for press welding, but also the injection molding can be ensured to be carried out smoothly by overcoming the huge resistance of the molten material flowing in the mold.
Further, a pressure reducing valve is further arranged on the pressure sliding plate.
In the injection molding process, under the condition of large injection pressure, during the second injection molding, the plastic of the product which is molded for the first time is deformed, so that the possibility of generation of a batch edge can be caused during the second injection molding, and the pressure is reduced by using a pressure reducing valve, so that the overlarge pressure is avoided.
Further, double-colored injection mould assembly is including changeing core axis of rotation, commentaries on classics core rotor plate, commentaries on classics core connecting plate, first mechanism, the second mechanism of moulding plastics, change core rotor plate upper end and connect first mechanism of moulding plastics, change core rotor plate lower extreme and connect the second mechanism of moulding plastics, the installation is changeed the core axis of rotation in the middle of changeing the core rotor plate, first mechanism of moulding plastics runs through and fixed connection changes core connecting plate upper end, the second mechanism of moulding plastics runs through and fixed connection changes core connecting plate lower extreme, first mechanism of moulding plastics embeds there is first color channel, the second mechanism of moulding plastics embeds there is the second color channel, first movable mould is connected to first mechanism of moulding plastics front end, the second movable mould is connected to the second mechanism of moulding plastics front end, first color channel and second color channel are connected with first fixed mould and second fixed mould respectively.
Further, it is equipped with driving motor to change core axis of rotation outer wall, it is equipped with core clamping ring to change core axis of rotation outer wall back end, is equipped with in the middle of the core rotor plate and changes the core round hole, it has the first drive gear that is used for with core clamping ring complex to change core round hole built-in, it is equipped with the core telescopic link to change core axis of rotation outer wall front end, be equipped with the core locking piece that changes with the matching of core telescopic link on the core connecting plate to change, it includes core rotating plate body, two core rotating bearing frame, two core rotating rotary disks to change the core rotor plate, it sets up at core rotating plate body upper surface to change core bearing frame symmetry, it distributes in two flanks of core rotating plate to change the holding tank, be equipped with core rotating disk in the core rotating tank, the downthehole first drive gear of core rotating disk can drive core rotating disk and move respectively.
The working principle and the advantages of the invention are as follows: a first injection mechanism is utilized to provide a first color injection fluid melt channel for a first movable mold, and similarly, a second injection mechanism provides a second color injection fluid melt channel for a second movable mold, a first color plastic melt enters the first movable mold through a first color channel in the first injection mechanism, the first movable mold and the first fixed mold are closed, and the first color plastic melt is injected into a cavity formed by closing the first movable mold and the first fixed mold; the core rotating telescopic rod is retracted backwards to move, and the core rotating telescopic rod on the core rotating shaft is matched with the core rotating stop block to complete the mold splitting of the first movable mold and the first fixed mold and the mold splitting of the second movable mold and the second fixed mold; the rotary core rotating plate rotates 180 degrees, the rotary core telescopic rod extends forwards and moves, the rotary core telescopic rod on the rotary core rotating shaft is matched with the rotary core stop block to complete the die assembly of the first movable die and the second fixed die and the injection of the second color, and in the same way, the die assembly of the second movable die and the first fixed die is completed, the first color is injected into a die cavity formed by the die assembly of the second movable die and the first fixed die, the first injection pressure mechanism is connected with the first fixed die, the second injection pressure mechanism is connected with the second fixed die, the die assembly of the first movable die and the first fixed die is completed, at the moment, the first color is injected, the excessive pressure in the die cavity in the first movable die and the first fixed die is avoided, the first injection pressure mechanism does not apply pressure to the die cavity, and when the first movable die and the second fixed die are closed, the second injection pressure mechanism applies pressure to the die cavity, enabling the two colors of molten plastic to be press welded together.
The invention also provides an injection molding method of the rotary core type pressure injection bicolor injection mold, which comprises the following steps:
s1, performing double-color injection by using an injection molding device, wherein the injection molding device comprises a rack, a feeding bin positioned at the left of the rack, and an injection cavity positioned at the right of the rack, a fixed mold and a movable mold are arranged on the rack, the fixed mold comprises a first fixed mold and a second fixed mold, the movable mold comprises a first movable mold and a second movable mold, an injection pressure mechanism is arranged at one side of the fixed mold, which is far away from the movable mold, an injection pressure sliding mechanism is arranged on the injection pressure mechanism, the injection pressure sliding mechanism comprises a pressure sliding plate and a limiting plate, the injection pressure mechanism comprises a first injection pressure mechanism and a second injection pressure mechanism, a first sliding hole for the first injection pressure mechanism to pass through and a second sliding hole for the second injection pressure mechanism to pass through are arranged on the pressure sliding plate, two stepped holes are arranged on the limiting plate, and the stepped holes are through holes, the tail ends of the first injection pressure mechanism and the second injection pressure mechanism are respectively arranged in two stepped holes of the limiting plate, the pressure sliding plate is connected with the limiting plate through a limiting clamp key, the injection pressure nozzle is connected with the pressure air inlet,
s2, selecting plastics with two colors, feeding the plastics into a bin, dividing the interior of the bin into two parts, separately putting the plastics with the two colors into the bin, heating and melting the plastics in the injection molding device, and feeding the two melted plastics into a first injection mechanism and a second injection mechanism respectively;
s3, carrying out first die assembly, carrying out die assembly on a first fixed die and a first movable die, carrying out die assembly on a second fixed die and a second movable die, and injecting the first color molten plastic into a cavity formed by die assembly of the first fixed die and the first movable die through a first color channel in a first injection mechanism;
s4, splitting the die for the first time, and after the first cavity is filled, splitting the first fixed die and the first movable die, and splitting the second fixed die and the second movable die;
s5, the die is closed again, the melt shut-off valve is closed, the rotary core telescopic rod drives the whole rotary core rotating plate to rotate 180 degrees, the first fixed die mold and the second movable die mold are closed, the second fixed die mold and the first movable die mold are closed, the first color molten plastic is injected into a cavity formed by the first fixed die mold and the second movable die mold, meanwhile, the second color molten plastic is injected into the second color channel and enters the cavity formed by the closed die of the second fixed die mold and the first movable die mold, and under the action of the injection pressure sliding mechanism, the injection pressure nozzle and the injection pressure nozzle connected with the injection pressure nozzle are used for filling gas into the fixed die mold, and the first injection pressure mechanism and the second injection pressure mechanism move along with the pressure sliding plate to change the pressure of the filled gas, so that the two colors of molten plastics are pressed and welded together;
s6, splitting the second fixed die and the first movable die, and ejecting a plastic product formed in a cavity formed by the assembly of the second fixed die and the first movable die by an ejection mechanism in the injection molding device;
and S7, repeating S3-S5, and repeatedly manufacturing a plurality of double-color plastic products.
Drawings
FIG. 1 is a perspective view of the general structure of an injection molding apparatus for a rotary core type pressure injection two-color injection mold of the present invention;
FIG. 2 is a front view of the general structure of an injection molding apparatus for a rotary core, pressure injection, two-shot molding application of the present invention;
FIG. 3 is a cross-sectional view B-B of FIG. 2;
FIG. 4 is a perspective view of a rotary core type pressure injection bi-color injection mold of the present invention;
FIG. 5 is a perspective view of a rotary core rotating plate in the rotary core type pressure injection bi-color injection mold of the present invention;
FIG. 6 is a front view of a rotary core pressure injection bi-color injection mold of the present invention;
FIG. 7 is a top view of a pressure slide plate in a rotary core pressure injection bi-color injection mold of the present invention;
FIG. 8 is a cross-sectional view of a limiting plate in a rotary core pressure injection bi-color injection mold of the present invention;
fig. 9 is a sectional view of a portion a-a in fig. 7.
The main element symbols are as follows:
the injection molding machine comprises a double-color injection mold assembly 1, a rotary core rotating shaft 2, a driving motor 201, a rotary core rotating plate 3, a rotary core connecting plate 4, a first injection molding mechanism 5, a second injection molding mechanism 6, a pressure sliding plate 7, a limiting plate 8, a stepped hole 8a, a pressure air inlet 9, an injection pressure pipeline 10, a rack 11, a feeding bin 12, a pressure reducing valve 13, an injection pressure nozzle 14, a nozzle main body 14a, a connecting ring 14b, a clamping ring 14c, a melt closing valve 15, a limiting clamping key 16, a first injection pressure mechanism 17a, a second injection pressure mechanism 17b, an injection pressure air inlet plate 20 and an air transmission channel 20 a.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
In the first embodiment, the first step is,
as shown in fig. 1 to 9, a rotary core type pressure injection double-color injection mold comprises a fixed mold and a movable mold, wherein the rotary core type pressure injection mold is applied to an injection molding device, the injection molding device comprises a frame 11, a feeding bin 12 positioned at the right end above the frame 11 and an injection molding cavity positioned at the left end above the frame 11, the fixed mold is connected with the injection molding cavity, a double-color injection mold assembly 1 used for communicating the fixed mold with the injection molding cavity is arranged between the fixed mold and the injection molding cavity, and the movable mold and the fixed mold are matched to form an injection molding space.
The double-color injection mold assembly 1 comprises a rotary core rotating shaft 2, a rotary core rotating plate 3, a rotary core connecting plate 4, a first injection molding mechanism 5 and a second injection molding mechanism 6, as shown in figure 5, the upper end of the rotary core rotating plate 3 is connected with the first injection molding mechanism 5, the lower end of the rotary core rotating plate 3 is connected with the second injection molding mechanism 6, the rotary core rotating shaft 2 is arranged in the middle of the rotary core rotating plate 3, the first injection molding mechanism 5 penetrates through and is fixedly connected with the upper end of the rotary core connecting plate 4, the second injection molding mechanism 6 penetrates through and is fixedly connected with the lower end of the rotary core connecting plate 4, a first color channel is arranged in the first injection molding mechanism 5, a second color channel is arranged in the second injection molding mechanism 6, a movable mold comprises a first movable mold and a second movable mold, a fixed mold comprises a first fixed mold and a second fixed mold, the first fixed mold and the first movable mold are matched to form a first injection, the second fixed die and the second movable die are matched to form a second injection molding cavity (not shown in the figure), the front end of the first injection molding mechanism 5 is connected with the first movable die, the front end of the second injection molding mechanism 6 is connected with the second movable die, and the first color channel and the second color channel are respectively connected with the first fixed die and the second fixed die.
As shown in fig. 5, fig. 9, 2 outer walls of rotary core axis of rotation are equipped with driving motor 201, 2 outer wall back ends of rotary core axis of rotation are equipped with rotary core screens ring, be equipped with the rotary core round hole in the middle of rotary core rotor plate 3, the rotary core round hole embeds there is the first drive gear that is used for with rotary core screens ring complex, 2 outer wall front ends of rotary core axis of rotation are equipped with rotary core telescopic link, be equipped with the rotary core locking piece that matches with rotary core telescopic link on the rotary core connecting plate 4, rotary core rotor plate 3 is including the rotary core plate body, two rotary core bearing seats, two rotary core rolling disks, rotary core bearing seat symmetry sets up at rotary core plate body upper surface, rotary core plate holding tank distributes in 3 two flanks of rotary core rotor plate, be equipped with the rotary core rolling disk in the rotary core plate holding tank, the first drive gear in the rotary core round hole can drive rotary core rolling.
An injection pressure mechanism is arranged on one side of the fixed die mould far away from the movable die mould and is connected with the fixed die mould through an injection pressure air inlet plate 20, an injection pressure sliding mechanism is arranged on the injection pressure mechanism and comprises a pressure sliding plate 7 and a limiting plate 8, two through holes are formed in the pressure sliding plate 7, the injection pressure mechanism comprises a first injection pressure mechanism 17a and a second injection pressure mechanism 17b, the first injection pressure mechanism 17a and the second injection pressure mechanism 17b respectively penetrate through a first sliding hole and a second sliding hole in the pressure sliding plate 7 and are connected with the injection pressure air inlet plate 20, the tail ends of the first injection pressure mechanism 17a and the second injection pressure mechanism 17b are respectively arranged in two stepped holes 8a formed in the limiting plate 8, the pressure sliding plate 7 is connected with the limiting plate 8 through a limiting clamp key 16, the pressure sliding plate 7, The limit plate 8 and the limit catch 16 limit the free movement of the injection pressure mechanism.
Two stepped holes 8a are formed in the limiting plate 8, the through hole in the injection pressure movable plate is a special-shaped hole, the limiting clamp key 16 comprises a first limiting clamp key and a second limiting clamp key, one ends of the first limiting clamp key and the second limiting clamp key are arranged in the through hole of the pressure sliding plate 7, the other ends of the first limiting clamp key and the second limiting clamp key are arranged in the stepped holes 8a of the limiting plate 8, the through holes are also formed in the first limiting clamp key and the second limiting clamp key, the first injection pressure mechanism 17a and the second injection pressure mechanism 17b respectively penetrate through the through holes of the first limiting clamp key and the second limiting clamp key, the first limiting clamp key limits the free movement of the first injection pressure mechanism 17a, and the second limiting clamp key limits the free movement of the second injection pressure mechanism 17 b.
In the second embodiment, the first embodiment of the method,
as shown in fig. 1 to 9, a rotary core type pressure injection double-color injection mold comprises a fixed mold and a movable mold, wherein the rotary core type pressure injection mold is applied to an injection molding device, the injection molding device comprises a frame 11, a feeding bin 12 positioned at the right end above the frame 11 and an injection molding cavity positioned at the left end above the frame 11, the fixed mold is connected with the injection molding cavity, a double-color injection mold assembly 1 used for communicating the fixed mold with the injection molding cavity is arranged between the fixed mold and the injection molding cavity, and the movable mold and the fixed mold are matched to form an injection molding space.
The double-color injection mold assembly 1 comprises a rotary core rotating shaft 2, a rotary core rotating plate 3, a rotary core connecting plate 4, a first injection molding mechanism 5 and a second injection molding mechanism 6, as shown in figure 5, the upper end of the rotary core rotating plate 3 is connected with the first injection molding mechanism 5, the lower end of the rotary core rotating plate 3 is connected with the second injection molding mechanism 6, the rotary core rotating shaft 2 is arranged in the middle of the rotary core rotating plate 3, the first injection molding mechanism 5 penetrates through and is fixedly connected with the upper end of the rotary core connecting plate 4, the second injection molding mechanism 6 penetrates through and is fixedly connected with the lower end of the rotary core connecting plate 4, a first color channel is arranged in the first injection molding mechanism 5, a second color channel is arranged in the second injection molding mechanism 6, a movable mold comprises a first movable mold and a second movable mold, a fixed mold comprises a first fixed mold and a second fixed mold, the first fixed mold and the first movable mold are matched to form a first injection, the second fixed die and the second movable die are matched to form a second injection molding cavity (not shown in the figure), the front end of the first injection molding mechanism 5 is connected with the first movable die, the front end of the second injection molding mechanism 6 is connected with the second movable die, and the first color channel and the second color channel are respectively connected with the first fixed die and the second fixed die.
As shown in fig. 5, fig. 9, 2 outer walls of rotary core axis of rotation are equipped with driving motor 201, 2 outer wall back ends of rotary core axis of rotation are equipped with rotary core screens ring, be equipped with the rotary core round hole in the middle of rotary core rotor plate 3, the rotary core round hole embeds there is the first drive gear that is used for with rotary core screens ring complex, 2 outer wall front ends of rotary core axis of rotation are equipped with rotary core telescopic link, be equipped with the rotary core locking piece that matches with rotary core telescopic link on the rotary core connecting plate 4, rotary core rotor plate 3 is including the rotary core plate body, two rotary core bearing seats, two rotary core rolling disks, rotary core bearing seat symmetry sets up at rotary core plate body upper surface, rotary core plate holding tank distributes in 3 two flanks of rotary core rotor plate, be equipped with the rotary core rolling disk in the rotary core plate holding tank, the first drive gear in the rotary core round hole can drive rotary core rolling.
An injection pressure mechanism is arranged on one side of the fixed die mould far away from the movable die mould and is connected with the fixed die mould through an injection pressure air inlet plate 20, an injection pressure sliding mechanism is arranged on the injection pressure mechanism and comprises a pressure sliding plate 7 and a limiting plate 8, two through holes are formed in the pressure sliding plate 7, the injection pressure mechanism comprises a first injection pressure mechanism 17a and a second injection pressure mechanism 17b, the first injection pressure mechanism 17a and the second injection pressure mechanism 17b respectively penetrate through a first sliding hole and a second sliding hole in the pressure sliding plate 7 and are connected with the injection pressure air inlet plate 20, the tail ends of the first injection pressure mechanism 17a and the second injection pressure mechanism 17b are respectively arranged in two stepped holes 8a formed in the limiting plate 8, the pressure sliding plate 7 is connected with the limiting plate 8 through a limiting clamp key 16, the pressure sliding plate 7, The limit plate 8 and the limit catch 16 limit the free movement of the injection pressure mechanism.
Two stepped holes 8a are formed in the limiting plate 8, the through hole in the injection pressure movable plate is a special-shaped hole, the limiting clamp key 16 comprises a first limiting clamp key and a second limiting clamp key, one ends of the first limiting clamp key and the second limiting clamp key are arranged in the through hole of the pressure sliding plate 7, the other ends of the first limiting clamp key and the second limiting clamp key are arranged in the stepped holes 8a of the limiting plate 8, the through holes are also formed in the first limiting clamp key and the second limiting clamp key, the first injection pressure mechanism 17a and the second injection pressure mechanism 17b respectively penetrate through the through holes of the first limiting clamp key and the second limiting clamp key, the first limiting clamp key limits the free movement of the first injection pressure mechanism 17a, and the second limiting clamp key limits the free movement of the second injection pressure mechanism 17 b.
Because the injection pressure and the injection rate of two moulds are inconsistent, can make the plastic products who moulds plastics out merge and welded process has the flaw, in moulding plastics, can have under big injection pressure, when moulding plastics for the second time, the product plastic that has moulded for the first time takes place to warp, lead to moulding plastics for the second time and probably have the possibility of criticizing the cutting edge of a knife or a sword and producing, be equipped with pressure air inlet 9 on the left of the cover half mould, including first pressure air inlet and second pressure air inlet, be equipped with injection pressure pipeline 10 on the pressure sliding plate 7, including first injection pressure pipeline and second injection pressure pipeline.
One end of the first injection pressure pipeline and one end of the second injection pressure pipeline are detachably connected with the first pressure air inlet and the second pressure air inlet, the other ends of the first injection pressure pipeline and the second injection pressure pipeline are respectively connected with an injection pressure nozzle 14, the injection pressure nozzle 14 is detachably connected with the injection pressure pipeline 10, when the injection molding is carried out through the injection pressure nozzle 14 and the injection pressure pipeline, the injection pressure and the injection rate of the two molds can be adjusted in a consistent way through the synchronous action of the pressure sliding plate 7 and the limiting plate 8, two gas transmission channels 20a are arranged inside the injection pressure gas inlet plate 10, the two gas transmission channels 20a are all through channels, the first fixed die mould and the second fixed die mould are both provided with gas inlet channels, the two air inlet channels are connected with one end of two air transmission channels 20a one by one, and the other ends of the two air transmission channels 20a are connected with a pressure air inlet 9 and a pressure injection mechanism.
And the injection pressure nozzle 14 is detachably connected with the injection pressure pipeline 10, the injection pressure nozzle 14 comprises a nozzle main body 14a, a connecting ring 14b and a clamping ring 14c, when the injection pressure nozzle 14 is connected with the injection pressure pipeline 10, the nozzle main body 14a is not contacted with the injection pressure pipeline 10, and the nozzle main body 14 is connected with the injection pressure pipeline 10 through the connecting ring 14b and the clamping ring 14c, so that the external connection of the pressure conveying pipeline is facilitated, the cleaning of the pressure conveying pipeline is facilitated, and the blockage of the injection pressure nozzle 14 is also prevented.
When the injection molding is carried out, the injection pressure nozzle 14 is connected with the injection pressure pipeline 10, the other end of the injection pressure pipeline 10 is connected with the pressure air inlet 9, when the injection molding of the second color is carried out, large pressure needs to be applied to bond the two colors together, the injection pressure nozzle 14 is connected with an external air conveying device to convey air into the injection pressure pipeline 10, the air enters the injection pressure air inlet plate 20 through the pressure air inlet 9, and then the air in the injection pressure air inlet plate 20 is extruded by the injection pressure mechanism, because the other end of the air conveying channel 20a of the injection pressure air inlet plate 20 is connected with the fixed mold, when the air in the injection pressure air inlet plate 20 is extruded, the pressure in a cavity between the fixed mold and the movable mold is increased, and the two colors can be bonded together.
The ends of the first injection pressure mechanism 17a and the second injection pressure mechanism 17b are provided with a melt shut-off valve 15, and when the mold is closed, the melt shut-off valve 15 is closed, so that on one hand, melt backflow is prevented, and on the other hand, the injection pressure is maintained through a closed environment, and the huge resistance of the melt flowing in the mold is overcome. When injection molding is carried out, the pressure for injection needs to be kept larger, not only because two different plastic raw materials are used, the two plastic raw materials need to be fused by strong pressure for press welding, but also the injection molding can be ensured to be carried out smoothly by overcoming the huge resistance of the molten material flowing in the mold.
The pressure sliding plate 7 is also provided with a pressure reducing valve 13, during injection molding, under a large injection molding pressure, during secondary injection molding, plastic of a product which is molded for the first time is deformed, so that the possibility of generation of burrs during secondary injection molding is caused, and the pressure reducing valve 13 is utilized to reduce the pressure, so that overlarge pressure is avoided.
In the generation of the double-color plastic in the prior art, two sets of matched fixed die molds and movable die molds are usually adopted for manufacturing, but if the raw material temperature, the injection pressure and the injection rate in the two sets of equipment are inconsistent, the fusion and welding processes of the plastic products which are injected can have defects, and the raw material temperature, the injection pressure and the injection rate are inevitably different in the injection process, so that the welding precision of the plastic products is influenced, and in the double-color injection molding, two materials with different densities and performances are often adopted, so that the two plastics can be more likely to be incapable of being welded together, the subsequent use of the plastic products is influenced, the failure rate in the generation process can be increased, too low materials can be wasted, and the injection pressure mechanism is arranged on one side of the fixed die mold, so that the defects in the fusion and welding processes of the plastic products can be avoided by controlling the injection pressure, the first injection mechanism 5 provides a first color injection fluid melt channel for the first movable mold, and similarly, the second injection mechanism 6 provides a second color injection fluid melt channel for the second movable mold, the first color plastic melt enters the first movable mold through the first color channel in the first injection mechanism 5, the first movable mold and the first fixed mold are closed, and the first color plastic melt is injected into a cavity formed by closing the first movable mold and the first fixed mold; the core rotating telescopic rod is retracted backwards to move, the core rotating telescopic rod on the core rotating shaft 2 is matched with the core rotating stop block, the first movable die and the first fixed die are separated, and the second movable die and the second fixed die are separated.
The core rotating plate 3 rotates 180 degrees, the core rotating telescopic rod extends forwards and moves, the core rotating telescopic rod on the core rotating shaft 2 is matched with the core rotating stop block to complete the die assembly of a first movable die and a second fixed die and the injection of a second color, and in the same way, the die assembly of the second movable die and the first fixed die is completed, the first color is injected into a die cavity formed by the die assembly of the second movable die and the first fixed die, the first injection pressure mechanism 17a is connected with the first fixed die, the second injection pressure mechanism 17b is connected with the second fixed die, the die assembly of the first movable die and the first fixed die is completed, at the moment, the first color is injected to avoid the overlarge pressure in the die cavity of the first movable die and the first fixed die, the first injection pressure mechanism 17a does not apply pressure to the die cavity, and when the first movable die and the second fixed die are assembled, the second injection pressure mechanism 17b applies pressure to the die cavity, enabling the two colors of molten plastic to be press welded together.
The difference between the first embodiment and the second embodiment is that, compared with the first embodiment, in the second embodiment, an injection pressure nozzle is additionally arranged, due to the inconsistency of the injection pressure and the injection speed of the two molds, the process of fusing and welding the injection-molded plastic products has defects, in the injection molding process, under a large injection molding pressure, during the second injection molding, the plastic of the product which is molded at the first time is deformed, so that the second injection molding may have a possibility of generating burrs, a pressure air inlet 9 is arranged at the left side of the fixed die mould and comprises a first pressure air inlet and a second pressure air inlet, an injection pressure pipeline 10 is arranged on the pressure sliding plate 7 and comprises a first injection pressure pipeline and a second injection pressure pipeline, the defects in the fusion and welding processes of the injection-molded plastic products are reduced by keeping the pressure intensity in the cavity between the fixed die and the movable die to be increased.
The invention also provides an injection molding method of the rotary core type pressure injection bicolor injection mold, which comprises the following steps:
s1, performing double-color injection by using an injection molding device, wherein the injection molding device comprises a rack 11, a feeding bin 12 positioned at the left of the rack 11, and an injection cavity positioned at the right of the rack 11, the rack 11 is provided with a fixed mold and a movable mold, the fixed mold comprises a first fixed mold and a second fixed mold, the movable mold comprises a first movable mold and a second movable mold, one side of the fixed mold, which is far away from the movable mold, is provided with an injection pressure mechanism, the injection pressure mechanism is provided with an injection pressure sliding mechanism, the injection pressure sliding mechanism comprises a pressure sliding plate 7 and a limiting plate 8, the injection pressure mechanism comprises a first injection pressure mechanism 17a and a second injection pressure mechanism 17b, the pressure sliding plate 7 is provided with a first sliding hole for the first injection pressure mechanism 17a to pass through and a second sliding hole for the second injection pressure mechanism 17b to pass through, and the pressure sliding plate 7 is connected with the limiting plate 8 through a limiting clamp key 16, the injection pressure nozzle 14 is connected to the pressure inlet 9,
s2, selecting plastics of two colors, dividing the plastics into two parts in the feeding bin 12, separately putting the plastics of the two colors into the feeding bin 12, heating and melting the plastics in the injection molding device, and respectively feeding the two melted plastics into the first injection mechanism and the second injection mechanism;
s3, carrying out first die assembly, carrying out die assembly on a first fixed die and a first movable die, carrying out die assembly on a second fixed die and a second movable die, and injecting the first color molten plastic into a cavity formed by die assembly of the first fixed die and the first movable die through a first color channel in a first injection mechanism;
s4, splitting the die for the first time, and after the first cavity is filled, splitting the first fixed die and the first movable die, and splitting the second fixed die and the second movable die;
s5, the die is closed again, the melt shut-off valve 15 is closed, the rotary core telescopic rod drives the whole rotary core rotating plate 3 to rotate 180 degrees, the first fixed die mold and the second movable die mold are closed, the second fixed die mold and the first movable die mold are closed, the first color molten plastic is injected into a cavity formed by the first fixed die mold and the second movable die mold, meanwhile, the second color molten plastic is injected into the second color channel and enters the cavity formed by the closed die of the second fixed die mold and the first movable die mold, and under the action of the injection pressure sliding mechanism, the injection pressure nozzle 14 and the injection pressure nozzle 14 connected with the injection pressure nozzle 14 are used for filling gas into the fixed die mold, and the first injection pressure mechanism 17a and the second injection pressure mechanism 17b move along with the pressure sliding plate 7 to change the pressure of the filled gas, so that the two colors of molten plastics are pressed and welded together;
s6, splitting the second fixed die and the first movable die, and ejecting a plastic product formed in a cavity formed by the assembly of the second fixed die and the first movable die by an ejection mechanism in the injection molding device;
and S7, repeating S3-S5, and repeatedly manufacturing a plurality of double-color plastic products.
The core-rotating type pressure injection double-color injection mold and the injection molding method provided by the invention are described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a two-color injection mould of core-rotating pressure injection which characterized in that: including double-colored injection mould assembly, cover half mould, movable mould, injection pressure mechanism, the cavity of moulding plastics, the cover half mould with the cavity of moulding plastics is connected, be equipped with the double-colored injection mould assembly that is used for communicateing cover half mould and the cavity of moulding plastics between cover half mould and the cavity of moulding plastics, movable mould and cover half mould cooperation form the space of moulding plastics, just one side that movable mould was kept away from to the cover half mould is equipped with injection pressure mechanism.
2. The rotary core pressure injection bi-color injection mold of claim 1, wherein: the injection pressure mechanism is connected with the fixed die through the injection pressure air inlet plate, the injection pressure mechanism comprises a first injection pressure mechanism and a second injection pressure mechanism, the first injection pressure mechanism and the second injection pressure mechanism are connected through the injection pressure sliding mechanism, the injection pressure sliding mechanism comprises a pressure sliding plate and a limiting plate, the pressure sliding plate is provided with a first sliding hole for the first injection pressure mechanism to pass through and a second sliding hole for the second injection pressure mechanism to pass through, the top ends of the first injection pressure mechanism and the second injection pressure mechanism are connected with the injection pressure air inlet plate, the limiting plate is provided with two through stepped holes, and the tail ends of the first injection pressure mechanism and the second injection pressure mechanism are respectively arranged in the two stepped holes on the limiting plate, the pressure sliding plate is connected with the limiting plate through a limiting clamp key.
3. A rotary core pressure injection bi-color injection mold as defined in claim 2, wherein: the pressure slide plate is characterized in that the number of the limiting clamp keys is two, the limiting clamp keys are respectively a first limiting clamp key and a second limiting clamp key, one ends of the first limiting clamp key and the second limiting clamp key are respectively clamped in a first sliding hole and a second sliding hole of the pressure slide plate, the other ends of the first limiting clamp key and the second limiting clamp key are respectively clamped in two stepped holes in the limiting plate, through holes are formed in the first limiting clamp key and the second limiting clamp key, and the first injection pressure mechanism and the second injection pressure mechanism respectively penetrate through the through holes of the first limiting clamp key and the second limiting clamp key.
4. A rotary core pressure injection bi-color injection mold as defined in claim 3, wherein: one side of injection pressure air inlet plate is connected with the cover half mould, the opposite side of injection pressure air inlet plate is equipped with two pressure air inlets, is first pressure air inlet and second pressure air inlet respectively, be equipped with injection pressure pipeline on the pressure sliding plate, including first injection pressure pipeline and second injection pressure pipeline, and the one end of first injection pressure pipeline and second injection pressure pipeline with first pressure air inlet and second pressure air inlet detachable connection, the other end of first injection pressure pipeline and second injection pressure pipeline is connected with the injection pressure nozzle respectively, just the injection pressure nozzle is connected with injection pressure pipeline detachable.
5. The rotary core pressure injection bi-color injection mold of claim 4, wherein: the movable mould comprises first movable mould and second movable mould, the cover half mould comprises first cover half mould and second cover half mould, the inside two gas transmission passageways that are equipped with of injection pressure air inlet plate, two gas transmission passageways are the passageway that runs through, first cover half mould and second cover half mould all are equipped with inlet channel, two inlet channel and two gas transmission passageway's one end one-to-one, two gas transmission passageway's the other end is connected with pressure air inlet and pressure injection mechanism.
6. The rotary core pressure injection bi-color injection mold of claim 5, wherein: and the tail ends of the first injection pressure mechanism and the second injection pressure mechanism are respectively provided with a melting stock closing valve.
7. The rotary core pressure injection bi-color injection mold of claim 6, wherein: the pressure sliding plate is also provided with a pressure reducing valve.
8. The rotary core pressure injection bi-color injection mold of claim 7, wherein: the double-color injection mold assembly comprises a rotary core rotating shaft, a rotary core rotating plate, a rotary core connecting plate, a first injection molding mechanism and a second injection molding mechanism, wherein the upper end of the rotary core rotating plate is connected with the first injection molding mechanism, the lower end of the rotary core rotating plate is connected with the second injection molding mechanism, the rotary core rotating shaft is arranged in the middle of the rotary core rotating plate, the first injection molding mechanism penetrates through and is fixedly connected with the upper end of the rotary core connecting plate, the second injection molding mechanism penetrates through and is fixedly connected with the lower end of the rotary core connecting plate, a first color channel is arranged in the first injection molding mechanism, a second color channel is arranged in the second injection molding mechanism, the front end of the first injection molding mechanism is connected with a first movable mold, the front end of the second injection molding mechanism is connected with a second movable mold, and the first color channel and the second color channel are respectively connected with the first.
9. The rotary core pressure injection bi-color injection mold of claim 8, wherein: the outer wall of the rotary core rotating shaft is provided with a driving motor, the rear section of the outer wall of the rotary core rotating shaft is provided with a rotary core clamping ring, the middle of the rotary core rotating plate is provided with a rotary core round hole, a first transmission gear matched with the rotary core clamping ring is arranged in the rotary core round hole, the front end of the outer wall of the rotary core rotating shaft is provided with a rotary core telescopic rod, and the rotary core connecting plate is provided with a rotary core stop block matched with the rotary core telescopic rod; the rotary core rotating plate comprises a rotary core plate body, two rotary core bearing seats and two rotary core rotating discs, the rotary core bearing seats are symmetrically arranged on the upper surface of the rotary core plate body, the rotary core plate accommodating grooves are distributed on two side wings of the rotary core rotating plate, the rotary core rotating discs are arranged in the rotary core plate accommodating grooves, a first transmission gear in a rotary core round hole can drive the rotary core rotating discs to move respectively, and the rotary core rotating plate is arranged on the right side of the movable mould.
10. The injection molding method of a rotary core type pressure injection two-color injection mold according to claim 9, wherein: the method comprises the following steps:
s1, performing double-color injection by using an injection molding device, wherein the injection molding device comprises a rack, a feeding bin positioned at the left of the rack, and an injection cavity positioned at the right of the rack, a fixed mold and a movable mold are arranged on the rack, the fixed mold comprises a first fixed mold and a second fixed mold, the movable mold comprises a first movable mold and a second movable mold, an injection pressure mechanism is arranged at one side of the fixed mold, which is far away from the movable mold, an injection pressure sliding mechanism is arranged on the injection pressure mechanism, the injection pressure sliding mechanism comprises a pressure sliding plate and a limiting plate, the injection pressure mechanism comprises a first injection pressure mechanism and a second injection pressure mechanism, a first sliding hole for the first injection pressure mechanism to pass through and a second sliding hole for the second injection pressure mechanism to pass through are arranged on the pressure sliding plate, two stepped holes are arranged on the limiting plate, and the stepped holes are through holes, the tail ends of the first injection pressure mechanism and the second injection pressure mechanism are respectively arranged in two stepped holes of the limiting plate, the pressure sliding plate is connected with the limiting plate through a limiting clamp key, the injection pressure nozzle is connected with the pressure air inlet,
s2, selecting plastics with two colors, feeding the plastics into a bin, dividing the interior of the bin into two parts, separately putting the plastics with the two colors into the bin, heating and melting the plastics in the injection molding device, and feeding the two melted plastics into a first injection mechanism and a second injection mechanism respectively;
s3, carrying out first die assembly, carrying out die assembly on a first fixed die and a first movable die, carrying out die assembly on a second fixed die and a second movable die, and injecting the first color molten plastic into a cavity formed by die assembly of the first fixed die and the first movable die through a first color channel in a first injection mechanism;
s4, splitting the die for the first time, and after the first cavity is filled, splitting the first fixed die and the first movable die, and splitting the second fixed die and the second movable die;
s5, the die is closed again, the melt shut-off valve is closed, the rotary core telescopic rod drives the whole rotary core rotating plate to rotate 180 degrees, the first fixed die mold and the second movable die mold are closed, the second fixed die mold and the first movable die mold are closed, the first color molten plastic is injected into a cavity formed by the first fixed die mold and the second movable die mold, meanwhile, the second color molten plastic is injected into the second color channel and enters the cavity formed by the closed die of the second fixed die mold and the first movable die mold, and under the action of the injection pressure sliding mechanism, the injection pressure nozzle and the injection pressure nozzle connected with the injection pressure nozzle are used for filling gas into the fixed die mold, and the first injection pressure mechanism and the second injection pressure mechanism move along with the pressure sliding plate to change the pressure of the filled gas, so that the two colors of molten plastics are pressed and welded together;
s6, an ejection mechanism in the injection molding device ejects a plastic product cooled and formed in a cavity formed by closing the second fixed die and the first movable die;
and S7, repeating S3-S5, and repeatedly manufacturing a plurality of plastic products.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010295298.9A CN111452300A (en) | 2020-04-15 | 2020-04-15 | Rotary core type pressure injection double-color injection mold and injection molding method |
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| CN202010295298.9A CN111452300A (en) | 2020-04-15 | 2020-04-15 | Rotary core type pressure injection double-color injection mold and injection molding method |
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Application publication date: 20200728 |