CN113619036A - Double-color injection molding process and double-color injection molding system - Google Patents

Double-color injection molding process and double-color injection molding system Download PDF

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Publication number
CN113619036A
CN113619036A CN202111178810.2A CN202111178810A CN113619036A CN 113619036 A CN113619036 A CN 113619036A CN 202111178810 A CN202111178810 A CN 202111178810A CN 113619036 A CN113619036 A CN 113619036A
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CN
China
Prior art keywords
cavity
injection molding
die
closed
mold
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CN202111178810.2A
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Chinese (zh)
Inventor
岳文辉
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Xuzhou Jiushan Plastics Co ltd
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Xuzhou Jiushan Plastics Co ltd
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Priority to CN202111178810.2A priority Critical patent/CN113619036A/en
Publication of CN113619036A publication Critical patent/CN113619036A/en
Pending legal-status Critical Current

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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
    • B29C45/2602—Mould construction elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/78—Measuring, controlling or regulating of temperature
    • 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
    • B29C2045/1617—The materials being injected at different moulding stations using stack moulds
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/76006—Pressure
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/7604—Temperature
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/76056—Flow rate
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76177—Location of measurement
    • B29C2945/76254—Mould
    • B29C2945/76257—Mould cavity

Abstract

The double-color injection molding process and the double-color injection molding system are characterized in that a mold consists of a fixed mold and a movable mold, and a mold cavity during mold closing comprises a first mold cavity and a second mold cavity; a transverse first sliding block is arranged in the movable die, and when the first sliding block is arranged at a first position, the die cavity is a first die cavity; when the first sliding block is arranged at the second position, the die cavity is a first die cavity and a second die cavity which are adjacent and communicated, and the second die cavity is arranged outside the first die cavity; an injection molding cavity is arranged in the fixed die and comprises a first injection molding cavity and a second injection molding cavity; the injection molding cavities are respectively provided with a swing rod assembly for measuring the flow velocity and the temperature of the molten plastic; the outlet end of the injection molding cavity is respectively provided with a closed cavity component for opening and closing the first injection molding cavity and the second injection molding cavity. The second die cavity is formed outside the first die cavity through the movable first sliding block, so that the second injection molding is carried out continuously under the condition that the first injection molding is completed without dividing the die, a double-color injection molding process is formed, the injection molding quality and efficiency are effectively improved, and the double-color injection molding machine has strong practicability and wide applicability.

Description

Double-color injection molding process and double-color injection molding system
Technical Field
The invention relates to a double-color injection molding process, in particular to a double-color injection molding process and a double-color injection molding system.
Background
The double-color plastic molding process is a molding process in which two different materials are injected into the same set of mold, so that an injected part is formed by the two materials. Some two materials are different in color, and some materials are different in hardness, so that the attractiveness, assembly and other performances of the product are improved.
The technology utilizes more than two different materials to produce the same part, and different properties or colors of various materials are respectively utilized to meet different use requirements. The technology can effectively improve the production efficiency and the product quality and reduce the material cost, and the typical application is as follows: toy or tool handles, toothbrushes, consumer electronics, etc. made with materials of different colors and hardnesses; also includes the molding of automobile parts, such as some functional parts on the automobile, parts with lighting function, soft/hard functional parts, vibration damping parts, sealing parts, some friction parts, etc.
The existing double-color injection molding mostly adopts a mode of a male mold and two female molds, namely, the first injection molding is carried out in the male mold and the first female mold, the mold is opened after molding, the second injection molding is carried out by directly switching to the second female mold without demolding, and a double-color injection molding finished product can be obtained after demolding. The switching needs 180 degrees of rotation, and after long-time use, the rotation angle can generate angle deviation due to inertia and gravity, thereby affecting the quality of injection molding finished products.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a double-color injection molding process and a double-color injection molding system.
In order to achieve the above object, the present invention adopts the following technical solutions:
the double-color injection molding process comprises a mold consisting of a fixed mold and a movable mold;
when the die is closed, a cavity between the fixed die and the movable die is a die cavity and comprises a first die cavity and a second die cavity;
a first sliding cavity is arranged in the movable die along the horizontal direction, and a first sliding block is arranged in the first sliding cavity; when the first sliding block is arranged at the first position, a cavity between the fixed die and the movable die is a first die cavity; when the first sliding block is arranged at the second position, the cavity between the fixed die and the movable die is a first die cavity and a second die cavity which are adjacent and communicated, and the second die cavity is arranged outside the first die cavity;
an injection molding cavity is arranged in the fixed die and comprises a first injection molding cavity communicated with a first die cavity and a second injection molding cavity communicated with a second die cavity;
the first injection molding cavity and the second injection molding cavity are respectively internally provided with a swing rod assembly for measuring the flow rate and the temperature of the molten plastic;
and the outlet ends of the first injection molding cavity and the second injection molding cavity are respectively provided with a closed cavity component for opening and closing the first injection molding cavity and the second injection molding cavity.
The swing rod assembly comprises a swing rod arranged in the injection molding cavity, and the end of the swing rod is provided with a temperature measuring device;
the flow velocity of the molten plastic in the injection molding cavity is detected and adjusted through the swing amplitude of the swing rod when the swing rod is stressed, and the temperature of the molten plastic in the injection molding cavity is detected and adjusted through the feedback of the temperature measuring device.
The closed cavity assembly comprises a closed cavity sheet rotating by a shaft, and the closed cavity sheet is provided with a through hole matched with an outlet of the injection molding cavity; and the outer side surface of the cavity closing sheet is superposed with the inner side surface of the mold cavity.
The closed cavity assembly is used for adjusting the injection amount of the molten plastic.
A double-color injection molding system suitable for a double-color injection molding process comprises a control device, a feeding device and a mold;
the die comprises a fixed die and a movable die which are matched; a first sliding cavity is arranged in the movable die along the horizontal direction, and a first sliding block is arranged in the first sliding cavity; when the first slide block is arranged at the first position, a die cavity for closing the fixed die and the movable die is a first die cavity; when the first sliding block is arranged at the second position, the die cavities of the fixed die and the movable die for closing the dies are a first die cavity and a second die cavity, and the second die cavity is arranged outside the first die cavity and communicated with the first die cavity;
an injection molding cavity is arranged in the fixed die and comprises a first injection molding cavity communicated with a first die cavity and a second injection molding cavity communicated with a second die cavity;
the feeding device comprises a first feeding device connected with the first injection molding cavity in a connection mode and a second feeding device connected with the second injection molding cavity in a connection mode;
the first injection molding cavity and the second injection molding cavity are respectively internally provided with a swing rod assembly for measuring the flow rate and the temperature of the molten plastic; the swing rod assembly comprises a swing rod, a tension spring and a tension sensor, the middle shaft of the swing rod is arranged on the top wall of the injection molding cavity, the rod body below the shaft is arranged in the injection molding cavity, the rod body on the shaft is arranged on the outer side of the top wall, and the temperature sensor is arranged at the bottom end of the swing rod; the top end of the swing rod is fixedly connected with a tension sensor through a tension spring; the control device adjusts the power of the feeding device according to the feedback of the tension sensor and adjusts the power of the heating device arranged in the wall of the injection molding cavity according to the feedback of the temperature sensor;
the outlet ends of the first injection molding cavity and the second injection molding cavity are provided with a closed cavity component, the closed cavity component comprises a circular closed cavity sheet, and the circular surface is provided with a through hole matched with the outlet of the injection molding cavity; and the outer side surface of the closed cavity sheet is superposed with the inner side surface of the cavity, and the closed cavity sheet is linked with the middle shaft of the closed cavity sheet through a motor by a control device.
Furthermore, the middle shaft of the closed cavity piece is arranged between the first injection molding cavity and the second injection molding cavity, and the outlets of the first injection molding cavity and the second injection molding cavity are sequentially opened and closed through a through hole for rotation of the middle shaft.
Furthermore, the outlet ends of the first injection molding cavity and the second injection molding cavity are respectively provided with a closed cavity component, which comprises a first closed cavity component and a second closed cavity component.
Further, the outer layer of the heating device is provided with a heat insulation layer.
Further, along the horizontal direction, the fixed die is provided with a second sliding cavity, and a second sliding block is arranged in the second sliding cavity; the second injection molding cavity and the matched second closed cavity component are arranged in the second sliding block;
when the second slide block is arranged at the third position, a die cavity for closing the fixed die and the movable die is a first die cavity; when the second sliding block is arranged at the fourth position, the die cavities for closing the fixed die and the movable die are a first die cavity and a third die cavity, and the third die cavity is arranged outside the first die cavity and communicated with the second die cavity.
Furthermore, the first slide block and the second slide block are driven to slide by a control device through a pneumatic pump respectively.
The invention has the advantages that:
according to the double-color injection molding process and the double-color injection molding system, the second mold cavity and the communicated third mold cavity are formed outside the first mold cavity through the movable first slide block and the movable second slide block, so that the second injection molding is continued under the condition that the mold is not separated after the first injection molding is finished, and the double-color injection molding process is formed. And then, the flow speed and the temperature of the molten plastic in the injection molding cavity are measured through the swing rod of the integrated temperature sensor in the injection molding cavity, so that the molten plastic flowing into the mold cavity is ensured to be based on certain flow speed and temperature, and the quality of a finished product of the plastic part is further controlled. The cavity and the injection molding cavity are separated through the rotatable cavity closing piece, so that the temperature control before injection molding is facilitated, the cavity during injection molding is separated, the effect of mold breaking is formed, and the mold taking is facilitated. The plastic piece monitoring device is simple in structure and convenient to use, can accurately monitor the flow speed, flow and temperature of the molten plastic, further controls and adjusts the flow speed, flow and temperature, effectively improves the quality of finished plastic pieces, and has strong practicability and wide applicability.
Drawings
Fig. 1 is a schematic structural view of a first mold cavity in which a first slide and a second slide move in the same direction.
FIG. 2 is a schematic diagram of a second mold cavity with the first and second slides moving in the same direction.
FIG. 3 is a schematic diagram of a second mold cavity with the first and second slides moving in opposite directions.
Fig. 4 is a schematic structural diagram of the swing link assembly.
The designations in the drawings have the following meanings: 1. the device comprises a moving die, a fixed die, a first sliding block, a second sliding block, a first die cavity, a first injection molding cavity, a second die cavity, a third die cavity, a swing rod, a tension spring, a tension sensor, a temperature sensor, a heating device, a closed cavity piece, a tension sensor, a temperature sensor, a heating device, a closed cavity piece, a heating device and a motor, wherein the moving die is 2, the fixed die, 3, the first sliding block, 4, the second sliding block, 5, the first die cavity, 6, the first injection molding cavity, 7, the second injection molding cavity, 8, the second die cavity, 9, the third die cavity, 10, the swing rod, 11, the tension spring, 12, the tension sensor, 13, the temperature sensor, 14, the heating device, 15, the closed cavity piece, 16 and the motor.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
The double-color injection molding system consists of a control device, a feeding device and a mold.
The feeding device comprises a first feeding device and a second feeding device.
The mould consists of a fixed mould 2 and a movable mould 1; when the die is closed, the die cavity between the fixed die 2 and the movable die 1 is provided with a first die cavity 5 in a first stage and a second die cavity 8 in a second stage.
Along the horizontal direction, a first sliding cavity is arranged in the movable die 1, and the first sliding block 3 is arranged in the first sliding cavity; when the first slide block 3 is arranged at the first position, a cavity between the fixed die 2 and the movable die 1 is a first die cavity 5; when the first slide block 3 is arranged at the second position, the cavity between the fixed die 2 and the movable die 1 is a first die cavity 5 and a second die cavity 8 which are adjacent and communicated, and the second die cavity 8 is arranged outside the first die cavity 5. The first slide block 3 is driven by the control device through a pneumatic pump to slide along the first slide cavity.
An injection molding cavity is arranged in the fixed die 2 and comprises a first injection molding cavity 6 and a second injection molding cavity 7; the inlet of the first feeding device connected with the first injection molding cavity 6 supplies materials for the first mold cavity 5, and the inlet of the second feeding device connected with the second injection molding cavity 7 supplies materials for the second mold cavity 8. The outlet of the first injection molding cavity 6 is arranged right opposite to the first mold cavity 5, and the outlet of the second injection molding cavity 7 is arranged right opposite to the second mold cavity 8. And the outlets of the first injection molding cavity 6 and the second injection molding cavity 7 are respectively provided with a closed cavity component; the closed cavity component comprises a circular closed cavity sheet 15, and a through hole matched with an outlet of the injection molding cavity is formed in the circular surface; the outer side surface of the closed cavity piece 15 is overlapped with the inner side surface (inner wall surface) of the cavity, and the closed cavity piece 15 is linked with the central shaft thereof by a control device through a motor 16. Preferably, the central axis of the closed cavity piece 15 is arranged between the first injection molding cavity 6 and the second injection molding cavity 7, namely, the through hole of the same closed cavity piece 15 rotating through the central axis sequentially opens and closes the outlets of the first injection molding cavity 6 and the second injection molding cavity 7.
And swing rod 10 components are respectively arranged in the first injection molding cavity 6 and the second injection molding cavity 7, and each swing rod 10 component consists of a swing rod 10, a tension spring 11 and a tension sensor 12. The middle part of the swing rod 10 is axially arranged on the top wall of the injection molding cavity, the rod body below the shaft is arranged in the injection molding cavity, the rod body on the shaft is arranged on the outer side of the top wall, and the temperature sensor 13 is arranged at the bottom end of the swing rod 10; the top end of the swing link 10 is connected with a tension sensor 12 through a tension spring 11. The control device drives or adjusts the power of the feeding device according to the feedback of the tension sensor 12, and drives or adjusts the power of the heating device 14 arranged in the wall of the injection molding cavity according to the feedback of the temperature sensor 13. The outer layer of the heating device 14 is provided with a thermal barrier to prevent excessive heat transfer to another injection molding cavity.
Preferably, the fixed die 2 is provided with a second sliding cavity along the horizontal direction, and the second sliding block 4 is arranged in the second sliding cavity; when the second slide block 4 is arranged at the third position, a mold cavity for closing the fixed mold 2 and the movable mold 1 is a first mold cavity 5; when the second slide block 4 is arranged at the fourth position, the die cavities for closing the fixed die 2 and the movable die 1 are a first die cavity 5 and a third die cavity 9, and the third die cavity 9 is arranged outside the first die cavity 5 and communicated with the second die cavity 8. The second slide block 4 is driven by the control device through a pneumatic pump to slide along the second slide cavity.
Under this structure, the exit ends of the first injection molding cavity 6 and the second injection molding cavity 7 can only select different closed cavity components: the first closed cavity component and the second closed cavity component respectively open and close the outlet end.
When in use, the double-color injection molding process comprises the following steps:
the fixed die 2 and the movable die 1 are matched, and the control device drives the first slide block 3 to a first position and the second slide block 4 to a third position through air pumps (a first air pump and a second air pump) respectively, so that a die matching die cavity is a first die cavity 5.
The control device drives the power assembly of the feeding device to inject the molten plastic into the first injection molding cavity 6.
The control device compares the temperature of the molten plastic in the first injection molding cavity 6 fed back by the temperature sensor 13 with the set temperature, drives the heating device 14 in the cavity wall of the first injection molding cavity 6 to work, heats and adjusts the temperature of the heating device to the set temperature.
The control means drives the motor 16 of the first closing assembly to rotate the closing blade 15 at the outlet, opening the outlet and the molten plastic flows into the first mold cavity 5. The flowing molten plastic in the first injection molding cavity 6 is punched to form the swing rod 10, the swing rod 10 is stressed to swing based on a shaft, the tension spring 11 is pulled at the upper end of the swing rod 10, the tension (namely the stress) is fed back to the control device by the tension sensor 12, the control device determines the real-time flow rate of the flowing molten plastic according to the tension, the real-time flow rate is matched with the set flow rate, if the real-time flow rate is not consistent with the set flow rate, the power of the power assembly of the feeding device is adjusted, the feeding speed is adjusted, and the real-time flow rate of the molten plastic is matched with the set flow rate. At the same time, the temperature sensor 13 works synchronously, adjusting the power (heating intensity) of the heating device 14 in real time so that the temperature of the flowing molten plastic matches the set temperature.
In the actual use process, in order to improve the efficiency and shorten the adjustment time, the optimal power of the heating device 14 and the optimal power rate of the feeding device which are suitable for the current material can be obtained in advance through small experiments; constant parameter values can be preset during batch production, and in the process of actually injecting the molten plastic, the closed cavity piece 15 can be rotated by the motor 16 to control the opening degree of the outlet of the first injection molding cavity 6 so as to realize fine adjustment of the flow rate.
After the molten plastic is continuously injected into the first mold cavity 5 for a period of time, the control device verifies the total amount of the molten plastic injected into the first mold cavity 5 by combining the flow rate and the time, rotates the cavity closing sheet 15 through the motor 16 according to the total amount, closes the outlet of the first injection molding cavity 6, completes injection molding, and simultaneously forms a partition between the molten plastic in the first mold cavity 5 and the molten plastic in the first injection molding cavity 6, thereby facilitating mold taking or next injection molding. And the partition of the molten plastic in the first injection molding cavity 6 is also convenient for heat preservation, and the molten state is kept for the next injection molding operation.
The control device drives the first slide block 3 to a second position and the second slide block 4 to a fourth position through air pumps (a first air pump and a second air pump) respectively, so that the die closing die cavity is provided with a second die cavity 8 and a third die cavity which are communicated with each other in the empty position of the first die cavity.
Fig. 1 shows a schematic structural view of a first mold cavity in which a first slide 3 and a second slide 4 move in the same direction.
Fig. 2 is a schematic structural diagram of a second mold cavity in which the first slide 3 and the second slide 4 move in the same direction.
Fig. 3 is a schematic structural view of a second cavity in which the first slide 3 and the second slide 4 are moved in opposite directions.
Based on the different moving direction of first slider 3 and second slider 4, the exit opening direction of second injection molding chamber 7 is different, according to the user demand, can set up respectively in the different positions of different moulds, also can use simultaneously on same set of mould through accent auto-change over device.
Can also be arranged at the same position
The second feeding device feeds the second mold cavity 8 and the third mold cavity through the second injection mold cavity 7, in the same way as above.
And after the injection molding is finished, the fixed mold 2 and the movable mold 1 are separated, and the finished injection molding piece is taken out.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims (10)

1. The double-color injection molding process is characterized by comprising a mold consisting of a fixed mold and a movable mold;
when the die is closed, a cavity between the fixed die and the movable die is a die cavity and comprises a first die cavity and a second die cavity;
a first sliding cavity is arranged in the movable die along the horizontal direction, and a first sliding block is arranged in the first sliding cavity; when the first sliding block is arranged at the first position, a cavity between the fixed die and the movable die is a first die cavity; when the first sliding block is arranged at the second position, the cavity between the fixed die and the movable die is a first die cavity and a second die cavity which are adjacent and communicated, and the second die cavity is arranged outside the first die cavity;
an injection molding cavity is arranged in the fixed die and comprises a first injection molding cavity communicated with a first die cavity and a second injection molding cavity communicated with a second die cavity;
the first injection molding cavity and the second injection molding cavity are respectively internally provided with a swing rod assembly for measuring the flow rate and the temperature of the molten plastic;
and the outlet ends of the first injection molding cavity and the second injection molding cavity are respectively provided with a closed cavity component for opening and closing the first injection molding cavity and the second injection molding cavity.
2. The double-color injection molding process according to claim 1, wherein the swing rod assembly comprises a swing rod arranged in the injection molding cavity, and the end of the swing rod is provided with a temperature measuring device;
the flow velocity of the molten plastic in the injection molding cavity is detected and adjusted through the swing amplitude of the swing rod when the swing rod is stressed, and the temperature of the molten plastic in the injection molding cavity is detected and adjusted through the feedback of the temperature measuring device.
3. The two-color injection molding process according to claim 1, wherein the closed cavity assembly comprises a closed cavity piece rotating around a shaft, the closed cavity piece being provided with a through hole matching with an outlet of the injection molding cavity; and the outer side surface of the cavity closing sheet is superposed with the inner side surface of the mold cavity.
4. The two-color injection molding process of claim 1, wherein the closed-cell assembly is used to adjust the shot size of the molten plastic.
5. A two-shot injection molding system, which is suitable for the two-shot injection molding process according to any one of claims 1 to 4, comprising a control device, a feeding device and a mold;
the die comprises a fixed die and a movable die which are matched;
a first sliding cavity is arranged in the movable die along the horizontal direction, and a first sliding block is arranged in the first sliding cavity; when the first slide block is arranged at the first position, a die cavity for closing the fixed die and the movable die is a first die cavity; when the first sliding block is arranged at the second position, the die cavities of the fixed die and the movable die for closing the dies are a first die cavity and a second die cavity, and the second die cavity is arranged outside the first die cavity and communicated with the first die cavity;
an injection molding cavity is arranged in the fixed die and comprises a first injection molding cavity communicated with a first die cavity and a second injection molding cavity communicated with a second die cavity;
the feeding device comprises a first feeding device connected with the first injection molding cavity in a connection mode and a second feeding device connected with the second injection molding cavity in a connection mode;
the first injection molding cavity and the second injection molding cavity are respectively internally provided with a swing rod assembly for measuring the flow rate and the temperature of the molten plastic; the swing rod assembly comprises a swing rod, a tension spring and a tension sensor, the middle shaft of the swing rod is arranged on the top wall of the injection molding cavity, the rod body below the shaft is arranged in the injection molding cavity, the rod body on the shaft is arranged on the outer side of the top wall, and the temperature sensor is arranged at the bottom end of the swing rod; the top end of the swing rod is fixedly connected with a tension sensor through a tension spring; the control device adjusts the power of the feeding device according to the feedback of the tension sensor and adjusts the power of the heating device arranged in the wall of the injection molding cavity according to the feedback of the temperature sensor;
the outlet ends of the first injection molding cavity and the second injection molding cavity are provided with a closed cavity component, the closed cavity component comprises a circular closed cavity sheet, and the circular surface is provided with a through hole matched with the outlet of the injection molding cavity; and the outer side surface of the closed cavity sheet is superposed with the inner side surface of the cavity, and the closed cavity sheet is linked with the middle shaft of the closed cavity sheet through a motor by a control device.
6. The two-shot molding system of claim 5, wherein the central axis of the closed cavity piece is disposed between the first injection cavity and the second injection cavity, and the outlets of the first injection cavity and the second injection cavity are sequentially opened and closed by the through hole of the central axis.
7. The two-shot molding system of claim 5, wherein the outlet ends of the first and second injection cavities are each provided with a closed cavity assembly comprising a first closed cavity assembly and a second closed cavity assembly.
8. A two-shot moulding system according to claim 5, wherein the outer layer of the heating means is provided with a thermal insulation layer.
9. The two-shot molding system of claim 5, wherein, in the horizontal cross direction, the stationary mold is provided with a second slide cavity, and a second slide block is disposed in the second slide cavity; the second injection molding cavity and the matched second closed cavity component are arranged in the second sliding block;
when the second slide block is arranged at the third position, a die cavity for closing the fixed die and the movable die is a first die cavity; when the second sliding block is arranged at the fourth position, the die cavities for closing the fixed die and the movable die are a first die cavity and a third die cavity, and the third die cavity is arranged outside the first die cavity and communicated with the second die cavity.
10. A two-shot moulding system according to claim 5, wherein said first and second slides are each slidably driven by control means via pneumatic pumps.
CN202111178810.2A 2021-10-11 2021-10-11 Double-color injection molding process and double-color injection molding system Pending CN113619036A (en)

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Application Number Priority Date Filing Date Title
CN202111178810.2A CN113619036A (en) 2021-10-11 2021-10-11 Double-color injection molding process and double-color injection molding system

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Application Number Priority Date Filing Date Title
CN202111178810.2A CN113619036A (en) 2021-10-11 2021-10-11 Double-color injection molding process and double-color injection molding system

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205109888U (en) * 2015-09-12 2016-03-30 雅赛利(台州)制药有限公司 Reaction unit with pressure detection mechanism
CN108556262A (en) * 2017-12-28 2018-09-21 江苏铂英特电子科技有限公司 A kind of encapsulation die
CN213091050U (en) * 2020-10-10 2021-04-30 广州中桥能源科技有限公司 Multi-range pressure gauge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205109888U (en) * 2015-09-12 2016-03-30 雅赛利(台州)制药有限公司 Reaction unit with pressure detection mechanism
CN108556262A (en) * 2017-12-28 2018-09-21 江苏铂英特电子科技有限公司 A kind of encapsulation die
CN213091050U (en) * 2020-10-10 2021-04-30 广州中桥能源科技有限公司 Multi-range pressure gauge

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