A lateral core-pulling mechanism for two-color injection molding

Abstract

The present invention provides a lateral core-pulling mechanism for double-color mold injection molding, comprising an upper mold base and a lower mold base, wherein a first lateral core-pulling mechanism and a second lateral core-pulling mechanism are centrally symmetrically arranged between the upper mold base and the lower mold base, wherein the first lateral core-pulling mechanism comprises a first color mold device, and the first color mold devices are respectively arranged on both sides of the first color mold core, and the second lateral core-pulling mechanism comprises a second color mold device, and the second color mold devices are respectively arranged on both sides of the second color mold core, and the first color mold device is provided with a first locking mold assembly, and the first locking mold assembly is also connected to the lower mold base, and the second color mold device is provided with a second locking mold assembly, and the second locking mold assembly is also connected to the lower mold base; the above structure, through the action of the locking mold assembly, drives the first color mold device and the second color mold device to follow downward when the lower mold base moves downward, thereby realizing lateral core pulling and realizing that the lower mold base does not interfere with the first and second lateral core-pulling mechanisms during the rotation process after mold opening.

Description

Technical Field

[0001] The invention relates to the technical field of double-color molds, in particular to a lateral core-pulling mechanism for double-color mold injection molding. Background Art

[0002] In the prior art, when parts of different materials are injected into a two-color mold, and molten materials of different materials are injected successively, the selection of the mold injection flow channel needs to take more consideration of economy due to the change of material temperature. In addition, the fixed mold plates of mold A and mold B are switched successively, while the movable mold plate is shared. During the switching process of the fixed mold plate of the two-color mold, the slider on the movable mold plate may be loose. The conventional limit device limits it, and manual assistance is required to release the limit function when demolding the B mold. The operation is relatively troublesome, which affects production efficiency.

[0003] A floating core-pulling two-color injection mold is disclosed in a patent document with Chinese patent application number 202110093024.6 and announcement date 2021.05.07. Two groups of cavities are symmetrically arranged on the fixed mold plate, two groups of cores and two groups of movable mold core-pulling inserts are symmetrically arranged on the movable mold plate, and a movable mold insert driving device for driving the movable mold core-pulling insert to move up and down is arranged between the movable mold plate and the movable mold fixed plate. Side oblique glue-pulling devices for mold closing and sealing are symmetrically arranged on the left and right sides of the fixed mold plate. The movable and fixed molds are closed, and the first During the first molding, the movable mold insert driving device drives the movable mold core-pulling insert to move upward, and the lateral oblique glue-pulling device moves forward to complete the first glue sealing, thereby forming a first mold cavity for molding the hard glue part of the product. After the first molding, the movable mold insert driving device drives the movable mold core-pulling insert to move downward, and the lateral oblique glue-pulling device moves backward to complete the second glue sealing, thereby forming a second mold cavity for molding the soft glue part of the product, thereby realizing two-color injection molding. This invention replaces the rotary two-color mold, has a simple structure, a simple process, high production efficiency and low cost.

[0004] However, the movable mold core pulling insert of the invention is arranged inside the mold and needs to be driven by a movable mold insert driving device to perform core pulling. Due to the narrow space inside the mold, the moving stroke of the movable mold core pulling insert is greatly limited, and it is impossible to achieve a large-scale core pulling action, making it difficult to ensure that the workpiece can be smoothly removed from the mold cavity. Summary of the invention

[0005] The invention provides a lateral core pulling mechanism for double-color mold injection molding. Through the device of the invention, lateral core pulling can be realized and the lower mold base can be rotated after mold opening without interfering with the first and second lateral core pulling mechanisms.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a lateral core-pulling mechanism for double-color mold injection molding, comprising an upper mold base and a lower mold base, the upper mold base is arranged above the lower mold base, and a first lateral core-pulling mechanism and a second lateral core-pulling mechanism that are centrally symmetrical are arranged between the upper mold base and the lower mold base, the first lateral core-pulling mechanism comprising a first color mold device, a first color mold core is arranged at one end of the lower mold base, and first color mold devices are respectively arranged on both sides of the first color mold core, and the first color mold device is connected to one end of the upper mold base; the second lateral core-pulling mechanism comprises a second color mold device, a second color mold core is arranged at the other end of the lower mold base, and second color mold devices are respectively arranged on both sides of the second color mold core, and the second color mold device is connected to the other end of the upper mold base; a first clamping mold assembly is arranged on the first color mold device, and the first clamping mold assembly is also connected to the lower mold base, and a second clamping mold assembly is arranged on the second color mold device, and the second clamping mold assembly is also connected to the lower mold base.

[0007] In the above structure, after the first color molded part is injection molded, the upper mold base is fixed and the lower mold base moves downward to open the mold. At this time, the first color mold device and the second color mold device connected to the upper mold base move toward the outer sides of the first color mold core and the second color mold core while following the downward movement of the lower mold base. When the lower mold base moves downward to a certain position, the first clamping assembly and the second clamping assembly are opened, and the first color mold device and the second color mold device can be separated from the lower mold base, and the lower mold base can continue to move downward to a rotatable position for rotation, and the positions of the first color mold core and the second color mold core are interchanged. After the interchange is completed, the lower mold base moves upward, and the first clamping assembly and the second clamping assembly are reconnected to the first color mold device and the second color mold device. When the lower mold base moves to contact the upper mold base, the mold is closed and the second color injection molding can begin. After completing the second color injection molding, continue to open the lower mold base, take out the workpiece that has completed the two-color injection molding, and complete the primary injection molding process. Through the action of the clamping assembly, the first color mold device and the second color mold device are driven to follow downward when the lower mold base moves downward, so that the first color mold device and the second color mold device can perform lateral core pulling when the mold is opened. At the same time, when the lower mold base moves downward to a certain position, the first and second clamping assemblies are disengaged, and the first and second lateral core pulling mechanisms no longer follow the movement, and only the lower mold base together with the first and second color mold cores continue to move downward until the highest point in the first and second color mold cores is lower than the lowest point in the first and second lateral core pulling mechanisms, and then the lower mold base is rotated. In this way, both the lateral core pulling action and the rotation of the lower mold base can be realized without interference.

[0008] Further, the first color mold device includes a first color mold seat, a first color mold oblique guide block, a first color mold limiting block, a first color mold oblique guide column and a first color mold fixing block, the first color mold fixing block is fixedly connected to the upper mold seat, a first color mold oblique guide column is arranged on the first color mold fixing block, the first color mold oblique guide column is inclined from top to outside of the first color mold core, a first color mold oblique through hole corresponding to the first color mold oblique guide column is arranged on the first color mold seat, the first color mold oblique guide column is slidably connected in the first color mold oblique through hole, and a first color mold oblique guide column is arranged on one side of the first color mold seat to extend downward and outward from the top of the first color mold seat A first color mold limiting groove extending to the bottom end of the first color mold seat, a first limiting portion is provided on the first color mold seat at the upper end of the first color mold limiting groove, a first color mold limiting block is provided in the first color mold limiting groove, the first color mold limiting block is connected to the upper mold seat through the first color mold limiting block column, and a first color mold oblique guide groove is provided at both ends of the first color mold seat, which extends downward and outward from the top end of the first color mold seat to the bottom end of the first color mold seat, the inclination angle of the first color mold oblique guide groove is the same as the inclination angle of the first color mold oblique guide column, the first color mold oblique guide block is arranged in the first color mold oblique guide groove, and the first color mold oblique guide block The upper mold base is connected through the first color mold oblique guide block connecting column, and a first locking mold assembly is provided below the first color mold base; the first color mold device is provided with two, and the first color mold core is arranged between the first color mold devices, thereby, when the lower mold base moves downward, the first color mold oblique guide block is fixed, and under the action of the first locking mold assembly, the first color mold base moves downward with the first locking mold assembly, and under the action of the first color mold oblique guide column and the first color mold oblique through hole, the first color mold oblique guide groove and the first color mold oblique guide block are guided, and the first color mold base moves to both sides of the first color mold core, thereby the first color mold device can be slowly opened The first color mold base is open, and because a first color mold limit block fixed to the upper mold base is provided, when the first color mold base moves downward, the first color mold limit block slides relatively in the first color mold limit groove. When the first color mold limit block contacts the first limit portion at the top of the first color mold limit groove, the first color mold base is stuck, thereby stopping the movement of the first color mold base. At this time, the first locking mold assembly is disengaged, and the lower mold base can continue to move downward, while the first color mold base stops moving. In this way, lateral core pulling can be further and better realized, and after lateral core pulling, the lower mold base can continue to move downward and the first color mold device stops moving.

[0009] Further, the first mold locking assembly includes a first mold locking connection block and a first mold locking fixed block, the first mold locking fixed block is fixedly connected to the lower mold base, the first mold locking connection block is arranged on the first color mold base, the first mold locking fixed block includes a first mold locking fixed part and a first mold locking limit part, the first mold locking fixed part is connected to the lower mold base, and the first mold locking limit part is arranged at the top of the first mold locking fixed part, the first mold locking connection block includes a first mold locking connection fixed part and a first mold locking connection part, the first mold locking connection fixed part is arranged at the bottom of the first color mold base, and the first mold locking connection fixed part is arranged at the bottom of the first color mold base. A first mold locking connection portion is provided on the fixed portion, and the first mold locking limit portion is pressed and connected to the first mold locking connection portion. Thus, when the lower mold base moves downward, the first color mold base will move to both sides of the first color mold core and drive the first mold locking connection block to move. When the first color mold base moves downward to the first limit portion at the top end of the first color mold limit groove, the first mold locking connection block is separated from the first mold locking fixed block, thereby the lower mold base is disconnected from the first color mold device, and the lower mold base can continue to move downward and then rotate, thereby avoiding interference between the lower mold base and the first color mold device or the second color mold device during rotation.

[0010] Furthermore, the top end of the first mold locking limit portion is provided with an arcuate surface extending outward and downward in an arc shape from the center of the first mold locking limit portion, and the top end of the first mold locking connecting portion is provided with an arcuate surface extending outward and downward in an arc shape from the center of the first mold locking connecting portion. Thus, when the upper mold base and the lower mold base are closed, the first mold locking connecting portion and the first mold locking limit portion are in contact with each other, and the first mold locking connecting portion is more conveniently slid to the bottom of the first mold locking limit portion through the action of the arcuate surface.

[0011] Furthermore, a first color mold is provided on the other side of the first color mold base, and the first color mold core is arranged between the two first color molds, and a first injection space is formed between the first color molds and the first color mold core on both sides of the first color mold core. According to this arrangement, after the first mold closing is completed, the first color injection can be performed in the first injection space.

[0012] Further, the second color mold device includes a second color mold base, a second color mold oblique guide block, a second color mold limiting block, a second color mold oblique guide column and a second color mold fixed block, the second color mold fixed block is fixedly connected to the upper mold base, a second color mold oblique guide column is arranged on the second color mold fixed block, the second color mold oblique guide column is inclined from top to outside of the second color mold core, a second color mold oblique through hole corresponding to the second color mold oblique guide column is arranged on the second color mold base, the second color mold oblique guide column is slidably connected in the second color mold oblique through hole, and a second color mold oblique guide column is arranged on one side of the second color mold base, which extends downward and outward from the top of the second color mold base. A second color mold limiting groove extending to the bottom end of the second color mold base, a second limiting portion is provided on the second color mold base at the upper end of the second color mold limiting groove, a second color mold limiting block is provided in the second color mold limiting groove, the second color mold limiting block is connected to the upper mold base through the second color mold limiting block column, and second color mold oblique guide grooves are provided at both ends of the second color mold base, which extend downward and outward from the top end of the second color mold base to the bottom end of the second color mold base, the inclination angle of the second color mold oblique guide groove is the same as the inclination angle of the second color mold oblique guide column, the second color mold oblique guide block is arranged in the second color mold oblique guide groove, and the second color mold oblique guide block The upper mold base is connected through the second color mold oblique guide block connecting column, and a second locking mold assembly is provided below the second color mold base; the second color mold device is provided with two, and the second color mold core is arranged between the second color mold devices. Thus, when the lower mold base moves downward, the second color mold oblique guide block is fixed, and under the action of the second locking mold assembly, the second color mold base moves downward with the second locking mold assembly. Under the action of the second color mold oblique guide column and the second color mold oblique through hole, the second color mold oblique guide groove and the second color mold oblique guide block are guided, and the second color mold base moves to both sides of the second color mold core, thereby slowly opening the second color mold device. The second color mold base is open, and because a second color mold limit block fixed to the upper mold base is provided, when the second color mold base moves downward, the second color mold limit block slides relatively in the second color mold limit groove, and when the second color mold limit block contacts the second limit portion at the top end of the second color mold limit groove, the second color mold base is stuck, thereby stopping the second color mold base from moving. At this time, the second locking mold assembly is disengaged, and the lower mold base can continue to move downward, while the second color mold base stops moving. In this way, the lateral core pulling can be further and better realized, and the lower mold base can continue to move downward after the lateral core pulling, and the second color mold device stops moving.

[0013] Further, the second mold locking assembly includes a second mold locking connection block and a second mold locking fixed block, the second mold locking fixed block is fixedly connected to the lower mold base, the second mold locking connection block is arranged on the second color mold base, the second mold locking fixed block includes a second mold locking fixed part and a second mold locking limiting part, the second mold locking fixed part is connected to the lower mold base, and a second mold locking limiting part is arranged at the top of the second mold locking fixed part, the second mold locking connection block includes a second mold locking connection fixing part and a second mold locking connection part, the second mold locking connection fixing part is arranged at the bottom end of the second color mold base, and a second mold locking connection part is arranged on the second mold locking connection fixing part, and the second mold locking limiting part is pressed and connected to the second mold locking connection part, thereby, when the lower mold base moves downward, the second color mold base will move to both sides of the second color mold core and drive the second mold locking connection block to move, when the second color mold base moves downward to the topmost end of the second color mold limiting groove, the second mold locking connection block is separated from the second mold locking fixed block, thereby the lower mold base is disconnected from the second color mold device, and the lower mold base can continue to move downward for rotation.

[0014] Furthermore, the top end of the second mold locking limit portion is provided with an arcuate surface extending outward and downward in an arc shape from the center of the second mold locking limit portion, and the top end of the second mold locking connecting portion is provided with an arcuate surface extending outward and downward in an arc shape from the center of the second mold locking connecting portion. Thus, when the upper mold base and the lower mold base are closed, the second mold locking connecting portion and the second mold locking limit portion are in contact with each other, and the second mold locking connecting portion is more conveniently slid to the bottom of the second mold locking limit portion through the action of the arcuate surface.

[0015] Furthermore, a second color mold is provided on the other side of the second color mold base, and the second color mold core is arranged between the two second color molds, and a second injection molding space is formed between the second color molds and the second color mold core on both sides of the second color mold core. According to this arrangement, after the second mold closing is completed, the second color injection molding can be carried out in the second injection molding space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the lateral core-pulling mechanism for double-color mold injection molding of the present invention.

[0017] Figure 2 The present invention is a schematic structural diagram of the lateral core-pulling mechanism of the double-color injection molding without the upper mold base.

[0018] Figure 3 It is a schematic exploded view of the first color mode device of the present invention.

[0019] Figure 4 It is a schematic structural diagram of the first clamping assembly of the present invention.

[0020] Figure 5 Schematic diagram of the explosion of the second color mode device of the present invention.

[0021] Figure 6 It is a schematic diagram of the mechanism of the second clamping assembly of the present invention.

[0022] Figure 7 It is an exploded schematic diagram of the first lateral core pulling mechanism and the second lateral core pulling mechanism of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 7 As shown, a lateral core-pulling mechanism for double-color mold injection molding comprises an upper mold base 1 and a lower mold base 2, wherein the upper mold base 1 is arranged above the lower mold base 2, and a first lateral core-pulling mechanism 3 and a second lateral core-pulling mechanism 4 are arranged between the upper mold base 1 and the lower mold base 2, wherein the first lateral core-pulling mechanism 3 comprises a first color mold device 5, a first color mold core 31 is fixedly installed at one end of the lower mold base 2, a first cavity corresponding to the first color mold core 31 is arranged at the bottom of the upper mold base, and first color mold devices 5 are respectively arranged on both sides of the first color mold core 31, and the first color mold device 5 is connected to one end of the upper mold base 1 and can be relative to the upper mold base 1. movement; the second lateral core-pulling mechanism 4 includes a second color mold device 6, a second color mold core 41 is fixedly installed at the other end of the lower mold base 2, a second cavity corresponding to the second color mold core 41 is provided at the bottom of the upper mold base, and second color mold devices 6 are respectively provided on both sides of the second color mold core 41, and the second color mold device 6 is connected to the other end of the upper mold base 1 and can move relative to the upper mold base 1; the first color mold device 5 is provided with a first locking mold assembly 50, and the first locking mold assembly 50 is also connected to the lower mold base 2, and the second color mold device 6 is provided with a second locking mold assembly 60, and the second locking mold assembly 60 is also connected to the lower mold base 2.

[0025] like Figure 2 and Figure 3 As shown, the first color mold device 5 includes a first color mold base 51, a first color mold oblique guide block 52, a first color mold limiting block 53, a first color mold oblique guide column 54 and a first color mold fixed block 55. The first color mold fixed block 55 is fixedly connected to the upper mold base 1. The first color mold oblique guide column 54 is provided on the first color mold fixed block 55. The upper end of the first color mold oblique guide column 54 has a first step, and the first step is located in the first step hole at the upper end of the first color mold fixed block 55. The first color mold oblique guide column is axially limited by the upper mold base 1. A first color mold oblique through hole 541 corresponding to the first color mold oblique guide column 54 is provided on the first color mold base 51. The first color mold oblique guide column 54 is slidably connected in the first color mold oblique through hole 541. A first color mold limiting groove 531 (at the bottom of the first color mold base 51) extending downward and outward from the top of the first color mold base 51 to the bottom of the first color mold base 51 is provided on one side of the first color mold base 51. Figure 2As shown in the figure, a first limiting portion 5311 is provided on the first color mold base 51 at the upper end of the first color mold limiting groove 531. In this embodiment, the outer side surface of the first color mold base 51 is an inclined surface, and the inclination angle of the first color mold limiting groove 531 is the same as the inclination angle of the first color mold oblique guide column 54. A first color mold limiting block 53 is provided in the first color mold limiting groove 531. The first color mold limiting block 53 is connected to the upper mold base through a first color mold limiting block column (not shown in the figure). A first color mold base 51 is provided at both ends thereof. The top end of the first color mold oblique guide groove 521 is inclined downward and outward and extends to the bottom end of the first color mold seat 51. The inclination angle of the first color mold oblique guide groove 521 is the same as the inclination angle of the first color mold oblique guide column 54. The first color mold oblique guide block 52 is arranged in the first color mold oblique guide groove 521. The first color mold oblique guide block 52 is connected to the upper mold seat 1 through the first color mold oblique guide block connecting column (not shown in the figure). A first clamping mold assembly 50 is arranged below the first color mold seat 51; the first color mold device 5 is provided with two, and the first color mold core 31 is arranged in the first The color mold device 5 is arranged between the color mold devices 5, and thus, when the lower mold base 2 moves downward, the first color mold oblique guide block 52 is fixed, and the first color mold base 51 moves downward with the first clamping mold assembly 50. Under the action of the first color mold oblique guide column 54 and the first color mold oblique through hole 541, due to the guiding action of the first color mold oblique guide groove 521, the first color mold base 51 moves toward the outside of the first color mold core 31, thereby slowly opening the first color mold device 5 laterally, and because the first color mold limit block 53 fixed to the upper mold base 1 is provided, the first color mold base 51 moves toward the outside of the first color mold core 31. When moving downward, the first color mold limit block 53 slides relatively in the first color mold limit groove 531. When the first color mold limit block 53 contacts the first limit portion at the top of the first color mold limit groove 531, the first color mold base 51 is stuck, so that the first color mold base 51 stops moving. At this time, the first locking mold assembly is disengaged, and the lower mold base can continue to move downward, while the first color mold base stops moving. In this way, lateral core pulling can be further and better realized, and after lateral core pulling, the lower mold base can continue to move downward and the first color mold device stops moving.

[0026] like Figures 2 to 4As shown, the first mold locking assembly 50 includes a first mold locking connection block 501 and a first mold locking fixed block 502, the first mold locking fixed block 502 is fixedly connected to the lower mold base 2, the first mold locking connection block 501 is arranged on the first color mold base 51, the first mold locking fixed block 502 includes a first mold locking fixed part 5021 and a first mold locking limiting part 5022, the first mold locking fixed part 5021 is connected to the lower mold base 2, and the first mold locking limiting part 5022 is arranged on the top of the first mold locking fixed part 5021, the first mold locking connection block 501 includes a first mold locking connection fixed part 5011 and a first mold locking connection part 5012, the first mold locking connection fixed part 5011 is arranged on the first color mold base 51, At the bottom end of a color mold base 51, a first locking mold connecting portion 5012 is provided on the first locking mold connecting fixed portion 5011, and the first locking mold limiting portion 5022 is pressed and connected to the first locking mold connecting portion 5012. Thus, when the lower mold base 2 moves downward, the first color mold base 51 will move toward the outside of the first color mold core 31 and drive the first locking mold connecting block 501 to move. When the first color mold base 51 moves downward to the first limiting portion at the top end of the first color mold limiting groove 531, the first locking mold connecting block 501 is separated from the first locking mold fixing block 502, thereby disconnecting the lower mold base 2 from the first color mold device 5, and the lower mold base 2 can continue to move downward and then rotate, which can better avoid interference.

[0027] like Figure 4 As shown, the top end of the first mold locking limit portion 5022 is provided with an arcuate surface extending outward and downward from the center of the first mold locking limit portion 5022, and the top end of the first mold locking connection portion 5012 is provided with an arcuate surface extending outward and downward from the center of the first mold locking connection portion 5012. Thus, when the upper mold base 1 and the lower mold base 2 are closed, the first mold locking connection portion 5012 contacts the first mold locking limit portion 5022, and the first mold locking connection portion is more conveniently slid to the bottom of the first mold locking limit portion through the action of the arcuate surface.

[0028] like Figure 3 and Figure 7 As shown, a first color mold 511 is provided on the other side of the first color mold base 51, and the first color mold core 31 is arranged between the two first color molds 511, and a first injection molding space (not shown in the figure) is formed between the first color mold 511 and the first color mold core 31 on both sides of the first color mold core 31. According to this arrangement, after the first mold closing is completed, the first color injection molding can be carried out in the first injection molding space.

[0029] like Figure 2 and Figure 5As shown, the second color mold device 6 includes a second color mold base 61, a second color mold oblique guide block 62, a second color mold limiting block 63, a second color mold oblique guide column 64 and a second color mold fixed block 65, the second color mold fixed block 65 is fixedly connected to the upper mold base 1, and a second color mold oblique guide column 64 is provided on the second color mold fixed block 65. The upper end of the second color mold oblique guide column 64 has a second step, and the second step is located in the second step hole at the upper end of the second color mold fixed block 65, and the second color mold oblique guide column is axially limited by the upper mold base 1, and a second color mold oblique through hole 641 corresponding to the second color mold oblique guide column 64 is provided on the second color mold base 61, and the second color mold oblique guide column 64 is slidably connected in the second color mold oblique through hole 641, and a second color mold limiting groove 631 (at the bottom of the second color mold base 61) extending downward and outward from the top of the second color mold base 61 to the bottom of the second color mold base 61 is provided on one side of the second color mold base 61. Figure 2 As shown in the figure, a second limiting portion 6311 is provided on the second color mold base 61 at the upper end of the second color mold limiting groove 631. In this embodiment, the outer side surface of the second color mold base 61 is an inclined surface, and the inclination angle of the second color mold limiting groove 631 is the same as the inclination angle of the second color mold oblique guide column 64. A second color mold limiting block 63 is provided in the second color mold limiting groove 631. The second color mold limiting block 63 is connected to the upper mold base 1 through a second color mold limiting block column (not shown in the figure). A second color mold oblique guide groove 621 extends downward and outward from the top of the second color mold base 61 to the bottom of the second color mold base 61, and the inclination angle of the second color mold oblique guide groove 621 is the same as the inclination angle of the second color mold oblique guide column 64. The second color mold oblique guide block 62 is arranged in the second color mold oblique guide groove 621. The second color mold oblique guide block 62 is connected to the upper mold base 1 through the second color mold oblique guide block connecting column (not shown in the figure). A second clamping mold assembly 60 is arranged below the second color mold base 61; the second color mold device 6 is provided with The second color mold core 41 is arranged between the second color mold device 6, and thus, when the lower mold base 2 moves downward, the second color mold oblique guide block 62 is fixed, and the second color mold base 61 moves downward with the second clamping mold assembly 60. Due to the guiding effect of the second color mold oblique guide groove 621, the second color mold base 61 moves to the outside of the second color mold core 41, thereby the second color mold device 6 can be slowly opened, and because a second color mold limiting block 63 fixed to the upper mold base 1 is provided, when the second color mold base 61 moves downward, the second color mold The two-color mold limit block 63 slides relatively in the second color mold limit groove 631. When the second color mold limit block 63 contacts the second limit portion at the top of the second color mold limit groove 631, the second color mold base 61 is stuck, so that the second color mold base 61 stops moving. At this time, the second locking mold assembly is disengaged, and the lower mold base can continue to move downward, while the second color mold base stops moving. In this way, the lateral core pulling can be further and better realized, and the lower mold base can continue to move downward after the lateral core pulling, so that the second color mold device stops moving.

[0030] like Figure 5 and Figure 6 As shown, the second mold locking assembly 60 includes a second mold locking connection block 601 and a second mold locking fixed block 602, the second mold locking fixed block 602 is fixedly connected to the lower mold base 2, the second mold locking connection block 601 is arranged on the second color mold base 61, the second mold locking fixed block 602 includes a second mold locking fixed part 6021 and a second mold locking limiting part 6022, the second mold locking fixed part 6021 is connected to the lower mold base 2, and a second mold locking limiting part 6022 is arranged on the top of the second mold locking fixed part 6021, the second mold locking connection block 601 includes a second mold locking connection fixed part 6011 and a second mold locking connection part 6012, and the second mold locking connection fixed part 6011 is arranged on At the bottom end of the second color mold base 61, a second locking mold connecting portion 6012 is provided on the second locking mold connecting fixed portion 6011, and the second locking mold limiting portion 6012 is pressed and connected to the second locking mold connecting portion 6012. Thus, when the lower mold base 2 moves downward, the second color mold base 61 will move toward the outside of the second color mold core 41 and drive the second locking mold connecting block 601 to move. When the second color mold base 61 moves downward to the second limiting portion at the top end of the second color mold limiting groove 631, the second locking mold connecting block 601 is separated from the second locking mold fixing block 602, thereby the lower mold base 2 is disconnected from the second color mold device 6, and the lower mold base can continue to move downward and then rotate, which can better avoid interference.

[0031] like Figure 6 As shown, the top end of the second mold locking limit portion 6022 is provided with an arc surface extending outward and downward in an arc shape from the center of the second mold locking limit portion 6022, and the top end of the second mold locking connection portion 6012 is provided with an arc surface extending outward and downward in an arc shape from the center of the second mold locking connection portion 6012. Thus, when the upper mold base 1 and the lower mold base 2 are closed, the second mold locking connection portion 6012 contacts the second mold locking limit portion 6022, and the second mold locking connection portion is more conveniently slid to the bottom of the second mold locking limit portion through the action of the arc surface.

[0032] like Figure 5 and Figure 7 As shown, a second color mold 611 is provided on the other side of the second color mold base 61, and the second color mold core 41 is arranged between the two second color molds 611, and a second injection molding space (not shown in the figure) is formed between the second color mold 611 and the second color mold core 41 on both sides of the second color mold core 41. According to this arrangement, after the second mold closing is completed, the second color injection molding can be carried out in the second injection molding space.

[0033] In the above structure, after the first color molded part is injection molded, the upper mold base 1 is fixed and the lower mold base 2 moves downward to open the mold. At this time, the first color mold device 5 and the second color mold device 6 connected to the upper mold base 1 move toward the two sides of the first color mold core 31 and the second color mold core 32 while following the lower mold base 2 to move downward. When the lower mold base 2 moves downward to a certain position, the first clamping assembly 50 and the second clamping assembly 60 are opened, and the first color mold device 5 and the second color mold device 6 can be separated from the lower mold base 2, and the lower mold base 2 can continue to move downward to a rotatable position for rotation, and the positions of the first color mold core 31 and the second color mold core 41 are interchanged. After the interchange is completed, the lower mold base 2 moves upward, and the first clamping assembly 50 and the second clamping assembly 60 reconnect the first color mold device 5 and the second color mold device 6. When the lower mold base 2 moves to contact the upper mold base 1 , after the mold is closed, the second color injection molding can be started. After the second color injection molding is completed, the lower mold base 2 is continued to be opened, and the workpiece that has completed the two-color injection molding is taken out to complete the primary injection molding process. The first color mold device and the second color mold device are driven to follow downward when the lower mold base moves downward through the action of the clamping assembly, so that the first color mold device and the second color mold device can perform lateral core pulling when the mold is opened. At the same time, when the lower mold base moves downward to a certain position, the first and second clamping assemblies are disengaged, and the first and second lateral core pulling mechanisms no longer follow the movement, and only the lower mold base together with the first and second color mold cores continue to move downward until the highest point in the first and second color mold cores is lower than the lowest point in the first and second lateral core pulling mechanisms, and then the lower mold base is rotated. In this way, both the lateral core pulling action and the rotation of the lower mold base can be realized without interference.

Claims

1. A lateral core pulling mechanism for double-color mold injection, comprising an upper mold base and a lower mold base, wherein the upper mold base is arranged above the lower mold base, and is characterized in that: A first lateral core-pulling mechanism and a second lateral core-pulling mechanism are centrally symmetrically arranged between the upper die base and the lower die base, wherein the first lateral core-pulling mechanism comprises a first color mold device, a first color mold core is arranged at one end of the lower die base, and first color mold devices are arranged on both sides of the first color mold core, and the first color mold device is connected to one end of the upper die base; the second lateral core-pulling mechanism comprises a second color mold device, a second color mold core is arranged at the other end of the lower die base, and second color mold devices are arranged on both sides of the second color mold core, and the second color mold device is connected to the other end of the upper die base; a first locking mold assembly is arranged on the first color mold device, and the first locking mold assembly is also connected to the lower die base, and a second locking mold assembly is arranged on the second color mold device, and the second locking mold assembly is also connected to the lower die base; The first color mold device comprises a first color mold seat, a first color mold oblique guide block, a first color mold limiting block, a first color mold oblique guide column and a first color mold fixing block, wherein the first color mold fixing block is fixedly connected to the upper mold seat, a first color mold oblique guide column is arranged on the first color mold fixing block, the first color mold oblique guide column is inclined from top to outside of the first color mold core, a first color mold oblique through hole corresponding to the first color mold oblique guide column is arranged on the first color mold seat, the first color mold oblique guide column is slidably connected in the first color mold oblique through hole, a first color mold limiting groove is arranged on one side of the first color mold seat, and extends downward and outward from the top end of the first color mold seat to the bottom end of the first color mold seat, and a first color mold limiting groove is arranged on the first color mold seat at the upper end of the first color mold limiting groove. A first limiting portion is provided at the end, a first color mold limiting block is provided in the first color mold limiting groove, the first color mold limiting block is connected to the upper mold base through the first color mold limiting block column, and first color mold oblique guide grooves are provided at both ends of the first color mold base, extending downward and outward from the top of the first color mold base to the bottom of the first color mold base, the inclination angle of the first color mold oblique guide groove is the same as the inclination angle of the first color mold oblique guide column, the first color mold oblique guide block is arranged in the first color mold oblique guide groove, the first color mold oblique guide block is connected to the upper mold base through the first color mold oblique guide block connecting column, and a first locking mold assembly is provided below the first color mold base; two first color mold devices are provided, and the first color mold core is arranged between the first color mold devices; The second color mold device comprises a second color mold seat, a second color mold oblique guide block, a second color mold limiting block, a second color mold oblique guide column and a second color mold fixed block, the second color mold fixed block is fixedly connected to the upper mold seat, a second color mold oblique guide column is arranged on the second color mold fixed block, the second color mold oblique guide column is inclined from top to outside of the second color mold core, a second color mold oblique through hole corresponding to the second color mold oblique guide column is arranged on the second color mold seat, the second color mold oblique guide column is slidably connected in the second color mold oblique through hole, a second color mold limiting groove is arranged on one side of the second color mold seat, which extends downward and outward from the top end of the second color mold seat to the bottom end of the second color mold seat, and an upper portion of the second color mold limiting groove is arranged on the second color mold seat. A second limiting portion is provided at the end, and a second color mold limiting block is provided in the second color mold limiting groove, the second color mold limiting block is connected to the upper mold base through the second color mold limiting block column, and second color mold oblique guide grooves are provided at both ends of the second color mold base, which extend downward and outward from the top of the second color mold base to the bottom of the second color mold base, and the inclination angle of the second color mold oblique guide groove is the same as the inclination angle of the second color mold oblique guide column. The second color mold oblique guide block is arranged in the second color mold oblique guide groove, and the second color mold oblique guide block is connected to the upper mold base through the second color mold oblique guide block connecting column, and a second locking mold assembly is provided below the second color mold base; two second color mold devices are provided, and the second color mold core is arranged between the second color mold devices.

2. The lateral core-pulling mechanism for double-color injection molding according to claim 1, characterized in that: The first mold locking assembly includes a first mold locking connecting block and a first mold locking fixing block, the first mold locking fixing block is fixedly connected to the lower mold base, the first mold locking connecting block is arranged on the first color mold base, the first mold locking fixing block includes a first mold locking fixing part and a first mold locking limiting part, the first mold locking fixing part is connected to the lower mold base, and a first mold locking limiting part is arranged at the top of the first mold locking fixing part, the first mold locking connecting block includes a first mold locking connecting fixing part and a first mold locking connecting part, the first mold locking connecting fixing part is arranged at the bottom end of the first color mold base, a first mold locking connecting part is arranged on the first mold locking connecting fixing part, and the first mold locking limiting part is pressed and connected to the first mold locking connecting part.

3. The lateral core-pulling mechanism for double-color injection molding according to claim 2, characterized in that: The top of the first mold locking limiter is provided with an arc surface extending outward and downward from the center of the first mold locking limiter, and the top of the first mold locking connection is provided with an arc surface extending outward and downward from the center of the first mold locking connection.

4. The lateral core-pulling mechanism for double-color injection molding according to claim 1, characterized in that: A first color mold is provided on the other side of the first color mold base, the first color mold core is arranged between the two first color molds, and an injection space is formed between the first color molds and the first color mold core on both sides of the first color mold core.

5. The lateral core-pulling mechanism for double-color injection molding according to claim 1, characterized in that: The second mold locking assembly includes a second mold locking connection block and a second mold locking fixed block, the second mold locking fixed block is fixedly connected to the lower mold base, the second mold locking connection block is arranged on the second color mold base, the second mold locking fixed block includes a second mold locking fixing part and a second mold locking limiting part, the second mold locking fixing part is connected to the lower mold base, and a second mold locking limiting part is arranged on the top of the second mold locking fixing part, the second mold locking connection block includes a second mold locking connection fixing part and a second mold locking connection part, the second mold locking connection fixing part is arranged at the bottom end of the second color mold base, a second mold locking connection part is arranged on the second mold locking connection fixing part, and the second mold locking limiting part is pressed and connected to the second mold locking connection part.

6. The lateral core-pulling mechanism for double-color injection molding according to claim 5, characterized in that: The top of the second mold locking limiter is provided with an arc surface extending outward and downward from the center of the second mold locking limiter, and the top of the second mold locking connection part is provided with an arc surface extending outward and downward from the center of the second mold locking connection part.

7. The lateral core-pulling mechanism for double-color injection molding according to claim 1, characterized in that: A second color mold is provided on the other side of the second color mold base, the second color mold core is arranged between the two second color molds, and a second injection molding space is formed between the second color molds on both sides of the second color mold core and the second color mold core.

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