Double-color injection molding structure with micro-motion core-pulling sliding block

Abstract

A double-color injection molding structure with a micro-motion core-pulling sliding block comprises a pressing plate, a sliding block set connected to the pressing plate in a sliding mode, and a core-pulling sliding block arranged on the sliding block set. The shoveling unit is slidably connected to the sliding block set and located on the side, away from the pressing plate, of the sliding block set, the shoveling unit comprises a first shoveling unit body and a second shoveling unit body, and a first V-shaped groove is integrally formed in the side, abutting against the sliding block set, of the first shoveling unit body; a second V-shaped groove is integrally formed in the side, abutting against the sliding block set, of the second shovel unit. The mold is fixedly connected between the first shovel unit and the second shovel unit; when the mold is closed, the first V-shaped groove and the second V-shaped groove slide in the first direction perpendicular to the plate face of the pressing plate and drive the sliding block set to slide towards one side of the mold, and the shovel set locks the sliding block set.

Description

Technical Field

[0001] This utility model relates to the field of mold manufacturing technology, and in particular to a two-color injection mold with a micro-motion core-pulling slider. Background Technology

[0002] Two-color injection molds are specialized molds used to manufacture two-color or two-material plastic products, widely used in consumer electronics, automotive parts, medical equipment, and other fields. The core process includes a first injection and a second injection; one material is injected in the first injection, followed by the injection of another material in the second. In two-color injection molding, the core-pulling mechanism is a key functional module, used to extract the core upon mold opening for plastic filling or insert positioning.

[0003] Currently, most two-color injection molds on the market use angled guide pillars or shovels as the core-pulling drive mechanism. Traditional angled guide pillars or shovels rely on mechanical angle driving. When the core-pulling distance is small, the short stroke and uneven force can easily lead to slider positioning deviation, affecting the dimensional accuracy of the plastic part. In addition, when the same mold needs to achieve multiple sets of different core-pulling distances, such as some holes requiring 1mm core pulling and others requiring 3mm core pulling, traditional structures require individual adjustment of the angled guide pillar angle or shovel stroke for each set, which is complex and prone to errors.

[0004] Therefore, it is necessary to provide a two-color injection molding structure with a micro-motion core-pulling slider that can avoid the difficulty of adjusting multiple sets of core-pulling distances and improve the control accuracy of small-distance core-pulling. Utility Model Content

[0005] The purpose of this invention is to provide a two-color injection molding structure with a micro-motion core-pulling slider that can avoid the difficulty of adjusting the distance of multiple core-pulling groups and improve the control accuracy of small-distance core-pulling.

[0006] According to one aspect of this application, a two-color injection molding structure with a micro-motion core-pulling slider is provided, the two-color injection molding structure comprising:

[0007] Pressure plate,

[0008] The slider assembly is slidably connected to the pressure plate;

[0009] A shovel assembly is slidably connected to the slider assembly and located on the side of the slider assembly away from the pressure plate. The shovel assembly includes a first shovel assembly and a second shovel assembly. The first shovel assembly has a first V-shaped groove integrally formed on the side abutting against the slider assembly, and the second shovel assembly has a second V-shaped groove integrally formed on the side abutting against the slider assembly.

[0010] The mold is fixedly connected between the first shovel assembly and the second shovel assembly;

[0011] When the mold is closed, the first V-groove and the second V-groove slide along a first direction perpendicular to the surface of the pressure plate, and respectively drive the slider group to slide to one side of the mold, and the shovel group locks the slider group.

[0012] More preferably, the slider group includes:

[0013] The first slider assembly is slidably connected to the pressure plate and is located between the first shovel assembly and the pressure plate;

[0014] The second slider assembly is slidably connected to the pressure plate and is located between the second shovel assembly and the pressure plate.

[0015] Even better,

[0016] When the first V-groove slides along the first direction, the first slider group moves along the pressure plate along the second direction;

[0017] When the second V-groove slides along the first direction, the second slider group moves along the pressure plate in the third direction.

[0018] More preferably, the second direction is parallel to the surface of the pressure plate, and the third direction is also parallel to the surface of the pressure plate, and the second direction is opposite to the third direction.

[0019] More preferably, the mold further includes a mold core, which is fixedly connected to the mold and located on the side of the mold closer to the pressure plate.

[0020] More preferably, the mold core is provided with a plurality of holes, and during the first injection of the mold, the holes support the hardware parts, and during the second injection of the mold, the holes are filled with plastic.

[0021] More preferably, the two-color injection molding structure further includes:

[0022] A fixing member is slidably connected to the first slider group and the second slider group, and is located between the first slider group and the second slider group;

[0023] Limiting blocks are located at both ends of the extending direction of the pressure plate to limit the sliding of the slider assembly.

[0024] More preferably, when the first slider group slides along the second direction and the second slider group slides along the third direction, the first slider group and the second slider group respectively press the fixing member to slide along the fourth direction opposite to the first direction.

[0025] More preferably, the two-color injection molding structure further includes an insert, one end of which is fixedly connected to the fixing member and the other end of which is fixedly connected to the mold.

[0026] More preferably, the insert passes through the mold core and is fixedly connected to the mold.

[0027] This utility model has the following beneficial effects:

[0028] By having the first V-groove 31A and the second V-groove respectively abut against the inclined surface of the slider group, when the mold closes, the closing force is directly converted into the lateral sliding of the slider group in the direction of the pressure plate surface. This avoids multi-stage force transmission and eliminates the gap between the abutting surfaces, improving the control accuracy of small-distance core pulling. Furthermore, by using the first V-groove and the second V-groove to slide along a first direction perpendicular to the pressure plate surface, and respectively driving the slider group to slide towards one side of the mold, the depth of the slider group in the first V-groove or the second V-groove can be adjusted, further adjusting the core pulling distance and avoiding the difficulty in adjusting the core pulling distance when multiple cores are being pulled in a two-color injection molding structure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the two-color injection molding structure described in one embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the planar structure state of the two-color injection molding structure at the start of mold closing in one embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the planar structure state of the two-color injection molding structure after mold closing in one embodiment of this application;

[0033] Figure 4 For the Figure 1 A cross-sectional view AA of the mold cut along the cutting line AA as described in the figure;

[0034] Explanation of reference numerals: 100, Two-color injection molding structure; 10, Pressure plate; 20, Slider group; 21, First slider group; 22, Second slider group; 30, Shovel group; 31, First shovel group; 31A, First V-groove; 32, Second shovel group; 32A, Second V-groove; 40, Mold; 41, Mold core; 41A, Hole; 50, Fixing component; 60, Limiting block; 70, Insert; F1, First direction; F2, Second direction; F3, Third direction; F4, Fourth direction. Detailed Implementation

[0035] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0036] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Please refer to Figure 1 - Figure 4 One embodiment of this application provides a two-color injection molding structure 100 with a micro-motion core-pulling slider. The two-color injection molding structure 100 includes: a pressure plate 10, a slider group 20, a shovel group 30, and a mold 40.

[0039] The slider assembly 20 is slidably connected to the pressure plate 10. The shovel assembly 30 is slidably connected to the slider assembly 20 and located on the side of the slider assembly 20 away from the pressure plate 10. The shovel assembly 30 includes a first shovel assembly 31 and a second shovel assembly 32. The first shovel assembly 31 has a first V-groove 31A integrally formed on one side abutting against the slider assembly 20, and the second shovel assembly 32 has a second V-groove 32A integrally formed on one side abutting against the slider assembly 20. The mold 40 is fixedly connected between the first shovel assembly 31 and the second shovel assembly 32. When the mold 40 is closed, the first V-groove 31A and the second V-groove 32A slide along a first direction F1 perpendicular to the surface of the pressure plate 10, and respectively drive the slider assembly 20 to slide towards one side of the mold 40. The shovel assembly 30 locks the slider assembly 20.

[0040] When the mold 40 closes, the first V-groove 31A and the second V-groove 32A move vertically. Their inclined structure decomposes the vertical closing force into a horizontal component, thus precisely driving the slider assembly 20 to slide laterally toward the mold 40. This direct force conversion mechanism eliminates the clearance error present in traditional inclined guide pillars, making it particularly suitable for small-stroke core-pulling control (0.5-3mm). Simultaneously, the symmetrical inclined surfaces of the V-grooves generate a normal clamping force at the mold closing endpoint, automatically locking the slider assembly 20 in a predetermined position without the need for additional springs or other auxiliary fixing devices. The separate design of the first shovel assembly 31 and the second shovel assembly 32, combined with the bidirectionally arranged slider assembly 20, allows for independent control of multiple core-pulling mechanisms. When the mold 40 closes, the two V-grooves act synchronously but in opposite directions, causing the first slider assembly 21 and the second slider assembly 22 to move in opposite directions. This symmetrical layout effectively balances lateral forces and prevents the mold core 41 from shifting. By adjusting the depth parameters of each V-groove, the core-pulling distance of different slider groups 20 can be flexibly set to meet the differentiated needs of complex hole positions in two-color injection molding. In addition, in commonly available two-color injection molds 40, the inclined guide pillars and the scraper require additional installation space. When multiple core-pulling mechanisms coexist, the overall size of the mold 40 increases, which is not conducive to miniaturization design. Furthermore, to ensure stable positioning of the slider during mold closing, auxiliary locking devices such as springs and ball screws are usually required, which not only increases the number of parts but may also lead to positioning failure due to wear after long-term use. The V-groove design in this application, which uses slider groups 20 to achieve core pulling and locking, integrates multiple functional components in traditional core-pulling mechanisms, such as inclined guide pillars, scrapers, and spring locks, into a single V-groove component. This not only simplifies the structure of the mold 40 but also significantly improves space utilization. During two-color injection molding, the slider group 20 accurately pulls the core during the first injection to form the hardware installation space, and during the second injection, it ensures the accuracy of the plastic filling position, perfectly solving the problem of collaborative positioning in multi-material injection molding.

[0041] More preferably, the slider group 20 includes: a first slider group 21 and a second slider group 22.

[0042] The first slider assembly 21 is slidably connected to the pressure plate 10 and is located between the first shovel assembly 31 and the pressure plate 10. The second slider assembly 22 is slidably connected to the pressure plate 10 and is located between the second shovel assembly 32 and the pressure plate 10.

[0043] The separate design of the first slider group 21 and the second slider group 22 enables bidirectional balanced core pulling. When the mold 40 closes, the first V-groove 31A drives the first slider group 21 to move in one direction, while the second V-groove 32A drives the second slider group 22 to move in the opposite direction. This symmetrical layout can cancel out lateral forces, preventing the mold core 41 from bearing unilateral loads, thus ensuring the overall structural stability of the mold 40. Furthermore, during two-color injection molding, the independent first slider group 21 and the second slider group 22 can be configured with different core pulling distances and movement sequences according to product requirements. For example, during the first injection, the first slider group 21 can be completely pulled to form a space for hardware installation, while the second slider group 22 only needs partial core pulling; during the second injection, the reset sequence of the two slider groups can be adjusted to achieve more complex plastic filling paths. This modular design greatly enhances the process adaptability of the mold 40. When a set of sliders is worn or the core pulling distance needs to be adjusted, the corresponding first V-groove 31A or first V-groove 31A component can be disassembled and repaired or replaced separately without disassembling the mold 40 as a whole.

[0044] More preferably, when the first V-groove 31A slides along the first direction F1, the first slider group 21 moves along the pressure plate 10 along the second direction F2. When the second V-groove 32A slides along the first direction F1, the second slider group 22 moves along the pressure plate 10 along the third direction F3.

[0045] This design achieves a direct conversion from vertical mold closing motion to horizontal core pulling motion through the inclined surface mechanical transformation of the first V-groove 31A and the second V-groove 32A. When the first V-groove 31A moves along the vertical first direction F1, its inclined surface contact forces the first slider group 21 to slide along the horizontal second direction F2. Similarly, the vertical movement of the second V-groove 32A drives the second slider group 22 to move along the opposite third direction F3. This bidirectional symmetrical design not only balances the lateral forces on the mold 40 but also allows the first slider group 21 and the second slider group 22 to be controlled independently. By adjusting the inclined surface angle or depth of the first V-groove 31A or the second V-groove 32A that they abut against, different core pulling distances and movement sequences can be flexibly set to meet the differentiated needs for complex hole positions in two-color injection molding.

[0046] More preferably, the second direction F2 is parallel to the surface of the pressure plate 10, and the third direction F3 is also parallel to the surface of the pressure plate 10, and the second direction F2 is opposite to the third direction F3.

[0047] By designing the sliding directions of the first slider group 21 and the second slider group 22 to be parallel to the surface of the pressure plate 10 and opposite in motion, mechanical balance is achieved. The horizontally opposite movements of the two slider groups can cancel each other out lateral forces, preventing the mold 40 from bearing unilateral loads and ensuring the stability of the mold closing process. The design parallel to the pressure plate 10 can effectively save space in the mold 40 through horizontal stacking, making the overall structure more compact. In addition, this symmetrical layout allows the first slider group 21 and the second slider group 22 to slide synchronously without interfering with each other.

[0048] More preferably, the mold 40 further includes a mold core 41, which is fixedly connected to the mold 40 and located on the side of the mold 40 near the pressure plate 10.

[0049] Fixing the mold core 41 to the mold 40 near the pressure plate 10 shortens the force transmission path of the core-pulling mechanism, improving motion accuracy and response speed, making it ideal for micro-distance core-pulling control scenarios. This layout creates a tight fit between the mold core 41 and the slider assembly 20, ensuring accurate positioning of the hardware during the first injection and guaranteeing the sealing of the plastic filling during the second injection.

[0050] More preferably, the mold core 41 is provided with a plurality of holes 41A. During the first injection of the mold 40, the holes 41A support the hardware parts, and during the second injection of the mold 40, the holes 41A are filled with plastic.

[0051] In the first injection, the hole 41A serves as a precision positioning reference for the hardware, ensuring the positional accuracy of the insert. In the second injection, these holes 41A transform into plastic channels, forming a gradient sealing structure through precisely controlled core-pulling distances. This dynamic conversion design retains the assembly functionality of the hardware while meeting the product's airtightness requirements. Simultaneously, the first V-groove 31A and the second V-groove 32A, respectively driving the first slider group 21 and the second slider group 22, ensure the stability of the hole 41A dimensions during both injection processes, avoiding positioning errors caused by mold changes in traditional two-color injection molds 40.

[0052] More preferably, the two-color injection molding structure 100 further includes: a fixing member 50 and a limiting block 60.

[0053] The fixing member 50 is slidably connected to the first slider group 21 and the second slider group 22, and is located between the first slider group 21 and the second slider group 22. The limiting block 60 is located at both ends of the extending direction of the pressure plate 10 to limit the sliding of the slider group 20.

[0054] The fixing component 50 serves as the mechanical linkage between the first slider group 21 and the second slider group 22. Through their sliding connection, it ensures the synchronicity of the two slider groups during reverse movement, avoiding jamming caused by asymmetrical forces. Simultaneously, the precisely positioned limiting blocks 60 form rigid stops at both ends of the pressure plate 10, preventing damage to the V-groove structure from overtravel of the sliders and precisely controlling the core-pulling distance. This design allows the first slider group 21 and the second slider group 22 to maintain a certain positioning accuracy even after repeated sliding. Furthermore, the limiting blocks 60 are replaceable, allowing the two-color injection molding structure 100 to quickly adjust the core-pulling stroke to adapt to different product requirements.

[0055] More preferably, when the first slider group 21 slides along the second direction F2 and the second slider group 22 slides along the third direction F3, the first slider group 21 and the second slider group 22 respectively press the fixing member 50 to slide along the fourth direction F4, which is opposite to the first direction F1.

[0056] In this design, when the first slider group 21 and the second slider group 22 slide in opposite directions, the symmetrical compression of the fixing member 50 generates a vertically upward displacement in the fourth direction F4. The movement of the fixing member 50 in the fourth direction F4 is converted into a force direction through the inclined plane or wedge structure. This conversion of the movement direction allows the fixing member 50 to drive the insert pins and other structures to reset synchronously. This bidirectional compression mechanism forms a self-balancing system and effectively counteracts the lateral force generated by the slider movement, reducing the stress on the mold core 41. In addition, the vertical movement of the fixing member 50 and the mold closing action of the V-groove are synchronized, ensuring that all core-pulling and resetting actions are completed before the mold 40 is fully closed. This design replaces traditional elastic elements with mechanical forced drive, avoiding the reset delay problem caused by spring fatigue.

[0057] More preferably, the two-color injection molding structure 100 further includes an insert 70, one end of which is fixedly connected to the fixing member 50 and the other end of which is fixedly connected to the mold 40.

[0058] More preferably, the insert 70 passes through the mold core 41 and is fixedly connected to the mold 40.

[0059] Among them, the insert 70 forms a stable support during the injection molding process through the double-ended fixing structure that penetrates the mold core 41. Its lower end is connected to the fixing part 50 that moves with the slider group 20, and its upper end is anchored to the mold body 40, so that the fixing pressure is evenly distributed, ensuring the dimensional stability of the first injection hardware positioning hole and the second injection plastic sealing surface.

[0060] Therefore, by having the first V-groove 31A and the second V-groove 32A respectively abut against the inclined surface of the slider assembly 20, when the mold 40 closes, the closing force is directly converted into the lateral sliding of the slider assembly 20 in the direction of the pressure plate 10, avoiding multi-stage force transmission and eliminating the gap between the abutting surfaces, thus improving the control accuracy of small-distance core pulling. Furthermore, by using the first V-groove 31A and the second V-groove 32A to slide along a first direction F1 perpendicular to the pressure plate 10, and respectively driving the slider assembly 20 to slide towards one side of the mold 40, the depth of the slider assembly 20 in the first V-groove 31A or the second V-groove 32A can be adjusted, further adjusting the core pulling distance, avoiding the difficulty in adjusting the core pulling distance when pulling more than 100 sets of cores in the two-color injection molding structure.

[0061] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A two-color injection molding structure with a micro-motion core-pulling slider, characterized in that, The two-color injection molding structure includes: Pressure plate, The slider assembly is slidably connected to the pressure plate; A shovel assembly is slidably connected to the slider assembly and located on the side of the slider assembly away from the pressure plate. The shovel assembly includes a first shovel assembly and a second shovel assembly. The first shovel assembly has a first V-shaped groove integrally formed on the side abutting against the slider assembly, and the second shovel assembly has a second V-shaped groove integrally formed on the side abutting against the slider assembly. The mold is fixedly connected between the first shovel assembly and the second shovel assembly; When the mold is closed, the first V-groove and the second V-groove slide along a first direction perpendicular to the surface of the pressure plate, and respectively drive the slider group to slide to one side of the mold, and the shovel group locks the slider group.

2. The two-color injection molding structure with a micro-motion core-pulling slider according to claim 1, characterized in that, The slider group includes: The first slider assembly is slidably connected to the pressure plate and is located between the first shovel assembly and the pressure plate; The second slider assembly is slidably connected to the pressure plate and is located between the second shovel assembly and the pressure plate.

3. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 2, characterized in that, When the first V-groove slides along the first direction, the first slider group moves along the pressure plate along the second direction; When the second V-groove slides along the first direction, the second slider group moves along the pressure plate in the third direction.

4. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 3, characterized in that, The second direction is parallel to the surface of the pressure plate, and the third direction is also parallel to the surface of the pressure plate, and the second direction is opposite to the third direction.

5. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 4, characterized in that, The mold also includes a mold core, which is fixedly connected to the mold and located on the side of the mold near the pressure plate.

6. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 5, characterized in that, The mold core has several holes. During the first injection molding, the holes support the hardware. During the second injection molding, the holes are filled with plastic.

7. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 6, characterized in that, The two-color injection molding structure also includes: A fixing member is slidably connected to the first slider group and the second slider group, and is located between the first slider group and the second slider group; Limiting blocks are located at both ends of the extending direction of the pressure plate to limit the sliding of the slider assembly.

8. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 7, characterized in that, When the first slider group slides along the second direction and the second slider group slides along the third direction, the first slider group and the second slider group respectively press the fixing member to slide along the fourth direction opposite to the first direction.

9. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 8, characterized in that, The two-color injection molding structure also includes an insert, one end of which is fixedly connected to the fixing member and the other end of which is fixedly connected to the mold.

10. A two-color injection molding structure with a micro-motion core-pulling slider according to claim 9, characterized in that, The insert passes through the mold core and is fixedly connected to the mold.

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