A demolding transmission assembly for a plastic forming mold
By utilizing the demolding transmission component of the plastic molding die, and through the combined linkage of the slider and the transmission gear rack, "one-to-two" production can be achieved with only one power cylinder, solving the problems of high cost and complex structure in the existing technology, and realizing the low cost and convenience of the mold.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGHAI YOUXIN PLASTIC MOLD CO LTD
- Filing Date
- 2026-02-06
- Publication Date
- 2026-05-29
AI Technical Summary
When using the "one-out-of-two" production method, existing plastic molding molds require the installation of multiple sets of hydraulic cylinders and complex hydraulic pipelines, resulting in high manufacturing costs, complex processes, and large mold size, making them inconvenient to store and move.
A demolding transmission component for a plastic molding die is adopted. Through the combined linkage of an active slider, a driven slider, and a transmission gear rack, multiple sliders are driven to move synchronously by a power cylinder, realizing a "one-out-two" production method, simplifying the structure and reducing the size of the mold.
It enables low-cost, simple-structure "one-out-two" production, reduces mold manufacturing costs, decreases process complexity, and facilitates mold storage and movement.
Smart Images
Figure CN121650198B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of plastic molding die technology, and in particular to a demolding transmission component for a plastic molding die. Background Technology
[0002] A plastic molding die is a specialized tool used to give plastic materials a specific shape and precise dimensions for mass production of plastic products. Through different molding processes, it cools and solidifies molten or softened plastic within the mold cavity, thus creating various plastic products. The demolding mechanism in a plastic molding die is a key device used to remove the molded plastic part from the cavity or core; its core function is to ensure that the plastic part can be smoothly and completely removed from the mold after the molding process.
[0003] To improve production efficiency, reduce unit cost, and make better use of space and resources, most plastic molding dies on the market are designed with two cavities to achieve a "one-out-of-two" production method, thus making more efficient use of the clamping force and working time of the injection molding machine. However, due to the complex structure of some injection molded parts, even a single mold cavity requires the use of more than two sets of slides, and each slide must be driven by a separate hydraulic cylinder. Therefore, plastic molding dies using the "one-out-of-two" method need to install more than four sets of hydraulic cylinders and lay corresponding hydraulic pipelines, resulting in higher mold manufacturing costs. The laying of multiple hydraulic pipelines also increases the complexity of the mold manufacturing process. In addition, since each hydraulic cylinder is installed on the outside of the mold, the large number of cylinders installed on the outside of the mold results in a large mold volume, causing inconvenience for mold storage and movement, which urgently needs to be resolved. Summary of the Invention
[0004] In view of the current state of the prior art, the technical problem to be solved by the present invention is to provide a demolding transmission component for plastic molding molds that can achieve a "one-out-two" production method with a relatively simple structure by only installing one power cylinder, thereby effectively reducing the mold manufacturing cost and the complexity of the mold manufacturing process, and can also effectively reduce the mold volume for easy storage and movement.
[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a demolding transmission assembly for a plastic molding die, comprising a fixed template, an active slider movably connected to the front edge of the top of the fixed template to have a forward and backward translation function, a first core seat fixed on the outer rear wall of the active slider, and a power cylinder fixed on the outer front wall of the fixed template, wherein the telescopic end of the power cylinder is arranged laterally to the rear and fixed on the active slider, characterized in that:
[0006] It also includes a first driven slider that is movably connected to the rear edge of the top of the fixed template to have a forward and backward translation function and is located behind the active slider, a first core block fixed on the outer wall of the front side of the first driven slider, and a second core block located to the left of the first core block. The right side of the second core block is movably connected to the left side of the first core block to have a forward and backward relative tilting linear movement function.
[0007] It also includes a horizontally rotatable drive shaft embedded in the bottom of the fixed template, a first drive gear concentrically sleeved and fixed on the drive shaft and movably disposed inside the fixed template, and two horizontally movably embedded in the bottom of the fixed template, each having the function of forward and backward translation and respectively meshing with the upper and lower sides of the first drive gear. The front end of the upper first drive rack is connected to the bottom of the active slider, and the rear end of the lower first drive rack is connected to the bottom of the driven slider.
[0008] It also includes a second driven slider that is movably connected to the right edge of the top of the fixed template to have a left and right translation function, a first core plate that is horizontally fixed to the outer wall of the left side of the second driven slider, and a first transmission plate that is horizontally and movably embedded in the bottom of the fixed template to have a left and right translation function and connected to the second driven slider. The first transmission plate is located below the second driven slider and to the right of a first transmission rack above it.
[0009] A first extension plate is formed laterally on the right side of the first transmission rack above. The left side of the first transmission plate is movably connected to the right side of the first extension plate to enable it to move linearly with relative tilting.
[0010] Preferably, it further includes two lateral traction units respectively arranged on the left and right and located to the left of the first driven slider and connected to the drive shaft. The lateral traction unit includes a third driven slider movably connected to the rear edge of the top of the fixed template to have a forward and backward translation function, a second transmission gear concentrically sleeved and fixed on the drive shaft and movably disposed inside the fixed template, and a second transmission rack laterally and movably embedded in the bottom of the fixed template to have a forward and backward translation function and meshing with the upper or lower side of the second transmission gear. The rear end of the second transmission rack is connected to the bottom of the third driven slider.
[0011] Preferably, it further includes a fourth driven slider movably connected to the top left edge of the fixed template to have left and right translation function, and a second transmission plate laterally and movably embedded in the bottom of the fixed template to have left and right translation function and connected to the fourth driven slider. The second transmission plate is located below the fourth driven slider and to the left of a lateral traction unit on the left.
[0012] Preferably, in one of the left-side lateral traction units, the left side of the second transmission rack has a laterally extended plate, and the right side of the second transmission plate is movably connected to the left side of the second extended plate to enable it to move linearly with relative tilting.
[0013] Preferably, the front outer wall of the third driven slider in the left and right lateral traction units is also fixed with an insert block and a second core plate, respectively.
[0014] Preferably, a second core seat is also fixed on the right outer wall of the fourth driven slider.
[0015] Preferably, a vertically arranged guide plate is fixed between the bottom of the active slider and the front end of the upper first transmission rack, between the bottom of the first driven slider and the rear end of the lower first transmission rack, between the bottom of the second driven slider and the first transmission plate, between the bottom of the third driven slider in each lateral traction unit and the rear end of the second transmission rack, and between the bottom of the fourth driven slider and the second transmission plate. Each guide plate is movably inserted and connected in the fixed template to have the function of forward and backward or left and right translation.
[0016] Compared with the prior art, the advantages of the present invention are as follows:
[0017] This invention achieves both combined linkage between the active slider, the first driven slider, the second driven slider, the third driven slider in the two lateral traction units, and the fourth driven slider, and coordinated linkage between the first core block and the second core block. Only one power cylinder needs to be installed to drive the active slider, the first driven slider, the second driven slider, the third driven slider in the two lateral traction units, the first core block, the second core block, and the fourth driven slider to move synchronously by the movement of its telescopic end. Thus, a "one-out-of-two" production method can be achieved with a relatively simple structure, thereby effectively reducing the mold manufacturing cost and the complexity of the mold manufacturing process. In addition, it can also effectively reduce the size of the mold for easy storage and movement. Attached Figure Description
[0018] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings:
[0019] Figure 1 This is an exploded top view of the left front side of the present invention;
[0020] Figure 2 This is a top view of the left front side of the first driven slider, the first core block, and the second core block of the present invention. Detailed Implementation
[0021] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0022] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.
[0023] like Figures 1-2 As shown, a demolding transmission assembly for a plastic molding die includes a fixed template 1, an active slider 2 movably connected to the front edge of the top of the fixed template 1 to have a forward and backward translation function, a first core seat 10 fixed on the rear outer wall of the active slider 2, and a power cylinder 3 fixed on the front outer wall of the fixed template 1. The telescopic end of the power cylinder 3 is arranged laterally to the rear and fixed on the active slider 2.
[0024] It also includes a first driven slider 5 that is movably connected to the rear edge of the top of the fixed template 1 to have the function of forward and backward translation and located behind the active slider 2, a first core block 6 fixed on the front outer wall of the first driven slider 5, and a second core block 7 located to the left of the first core block 6. The right side of the second core block 7 is movably connected to the left side of the first core block 6 to have the function of forward and backward relative tilting linear movement.
[0025] It also includes a horizontally rotatable drive shaft 12 embedded in the bottom of the fixed template 1, a first drive gear 13 concentrically sleeved and fixed on the drive shaft 12 and movably disposed inside the fixed template 1, and two horizontally movably embedded in the bottom of the fixed template 1, each having the function of forward and backward translation and respectively meshing with the upper and lower sides of the first drive gear 13. The front end of the upper first drive rack 11 is connected to the bottom of the active slider 2, and the rear end of the lower first drive rack 11 is connected to the bottom of the first driven slider 5.
[0026] It also includes a second driven slider 8 that is movably connected to the top right edge of the fixed template 1 to have a left and right translation function, a first core plate 9 that is horizontally fixed to the left outer wall of the second driven slider 8, and a first transmission plate 14 that is horizontally and movably embedded in the bottom of the fixed template 1 to have a left and right translation function and connected to the second driven slider 8. The first transmission plate 14 is located below the second driven slider 8 and to the right of a first transmission rack 11 above it.
[0027] A first extension plate 111 is formed outward from the right side of the first transmission rack 11 above. The left side of the first transmission plate 14 is movably connected to the right side of the first extension plate 111 to enable it to move linearly with relative tilting.
[0028] A demolding transmission assembly for a plastic molding die further includes two lateral traction units, each located to the left of the first driven slider 5 and connected to the transmission shaft 12. Each lateral traction unit includes a third driven slider 15 movably connected to the rear edge of the top of the fixed template 1 to enable forward and backward translation; a second transmission gear 19 concentrically mounted and fixed on the transmission shaft 12 and movably disposed inside the fixed template 1; and a second transmission rack 18 laterally and movably embedded in the bottom of the fixed template 1 to enable forward and backward translation and meshing with the upper or lower side of the second transmission gear 19. The rear end of the second transmission rack 18 is connected to the bottom of the third driven slider 15.
[0029] A demolding transmission assembly for a plastic molding die further includes a fourth driven slider 19 movably connected to the top left edge of a fixed template 1 to have a left-right translation function, and a second transmission plate 21 laterally and movably embedded in the bottom of the fixed template 1 to have a left-right translation function and connected to the fourth driven slider 19. The second transmission plate 21 is located below the fourth driven slider 19 and to the left of a lateral traction unit on the left.
[0030] The left side of the second transmission rack 18 in the left lateral traction unit has a horizontally arranged second extension plate 181. The right side of the second transmission plate 21 is movably connected to the left side of the second extension plate 181 to enable it to move linearly with relative tilting.
[0031] The third driven slider 15 in the left and right lateral traction units is also fixed with an insert block 16 and a second core plate 17 on its front outer wall.
[0032] A second core seat 20 is also fixed on the right outer wall of the fourth driven slider 19.
[0033] A vertically arranged guide plate 22 is fixed between the bottom of the active slider 2 and the front end of the upper first transmission rack 11, between the bottom of the first driven slider 5 and the rear end of the lower first transmission rack 11, between the bottom of the second driven slider 8 and the first transmission plate 14, between the bottom of the third driven slider 15 in each lateral traction unit and the rear end of the second transmission rack 18, and between the bottom of the fourth driven slider 19 and the second transmission plate 21. Each guide plate 22 is movably inserted and connected in the fixed template 1 to have the function of forward and backward or left and right translation.
[0034] Working principle:
[0035] The moving mold core 23 is embedded and fixed on the top of the fixed mold plate 1 and located between the active slider 2, the first driven slider 5, the second driven slider 8, the third driven slider 15 in the two lateral traction units, and the fourth driven slider 19. The top of the moving mold core 23 is provided with two mutually perpendicularly distributed first elongated cavities 231 and second elongated cavities 232.
[0036] The end of the first core seat 10 is movably embedded in the front side of the moving mold core 23 and cooperates with the front end of the second elongated cavity 232. The end of the first core block 6 is movably embedded in the rear side of the moving mold core 23 and cooperates with the rear end of the second elongated cavity 232. The end of the first core plate 9 is movably inserted into the right side of the moving mold core 23 and cooperates with the right inner wall of the second elongated cavity 232. The second core block 7 is movably embedded in the top of the moving mold core 23 to have the function of left and right translation. The left side of the second core block 7 cooperates with the right end of the first elongated cavity 231. The ends of the insert block 16 and the second core plate 17 are both movably inserted into the rear side of the moving mold core 23 and cooperate with the rear inner wall of the first elongated cavity 231. The end of the second core seat 20 is movably embedded in the left side of the moving mold core 23 and cooperates with the left end of the first elongated cavity 231.
[0037] When the moving template (not shown) located above the fixed template 1 is assembled with the fixed template 1, the end face of the moving mold core (not shown) located on the end face of the moving template (not shown) is also assembled with the end face of the moving mold core 23; the extension end of the driving power cylinder 3 extends outward, which can drive the first core seat 10 to move backward by means of the active slider 2 to complete the alignment and assembly, and at the same time, with the help of a corresponding guide plate 22, the upper first transmission rack 11 is also driven to move backward, and then with the help of the first transmission gear 13 and the transmission shaft 12, the lower first transmission rack 11 is driven to move forward. The first core block 6 is moved forward by a corresponding guide plate 22 and the first driven slider 5 to complete the alignment and assembly. Then, the second core block 7 is moved to the left by the connection between the second core block 7 and the first core block 6 to complete the alignment and assembly. At the same time, when the first extension plate 111 moves with the first transmission rack 11, it will also move the first transmission plate 14 to the left by the connection between the first extension plate 111 and the first transmission plate 14. Then, the second driven slider 8 and the first core plate 9 are moved to the left by the corresponding guide plate 22 to complete the alignment and assembly.
[0038] The rotation of the drive shaft 12 will also drive the second drive gear 19 in the two lateral traction units to rotate in the same direction, and then drive the two third driven sliders 15 to move forward with the help of a corresponding second drive rack 18 and guide plate 22, thereby driving the insert block 16 and the second core plate 17 to move forward to complete the alignment and splicing.
[0039] When the second transmission rack 18 on the left moves forward, it will also drive the second transmission plate 21 to move to the right through the connection between the second extension plate 181 and the second transmission plate 21. Then, through the corresponding guide plate 22, it will drive the fourth driven slider 19 and the second core seat 20 to move to the right, so that the second core seat 20 can complete the alignment and assembly.
[0040] Subsequently, the molten material is introduced into the cavity of the moving mold core (not shown) through the sprue provided in the moving mold plate (not shown), which respectively cooperates with the first elongated cavity 231 and the second elongated cavity 232 to complete the injection molding. After cooling, the first steering bracket 24 and the second steering bracket 25 (prior art) with similar structures and mutual cooperation are formed.
[0041] This invention achieves both combined linkage between the active slider 2, the first driven slider 5, the second driven slider 8, the third driven slider 15 in the two lateral traction units, and the fourth driven slider 19, and coordinated linkage between the first core block 6 and the second core block 7. Only one power cylinder 3 needs to be installed to drive the active slider 2, the first driven slider 5, the second driven slider 8, the third driven slider 15 in the two lateral traction units, the first core block 6, the second core block 7, and the fourth driven slider 19 to move synchronously by the movement of its telescopic end. Thus, a "one-out-of-two" production method can be achieved with a relatively simple structure, thereby effectively reducing the mold manufacturing cost and the complexity of the mold manufacturing process. In addition, it can also effectively reduce the size of the mold for easy storage and movement.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A demolding transmission assembly for a plastic molding die, comprising a fixed template, an active slider movably connected to the front edge of the top of the fixed template to perform forward and backward translation, a first core seat fixed to the outer rear wall of the active slider, and a power cylinder fixed to the outer front wall of the fixed template, wherein the telescopic end of the power cylinder is laterally rearward and fixed to the active slider, characterized in that: It also includes a first driven slider that is movably connected to the rear edge of the top of the fixed template to have a forward and backward translation function and is located behind the active slider, a first core block fixed on the outer wall of the front side of the first driven slider, and a second core block located to the left of the first core block. The right side of the second core block is movably connected to the left side of the first core block to have a forward and backward relative tilting linear movement function. The molding die is provided with two mutually perpendicularly distributed first elongated cavities and second elongated cavities. The end of the first core block is engaged with the rear end of the interior of the second elongated cavity, and the left side of the second core block is engaged with the right end of the interior of the first elongated cavity. It also includes a horizontally rotatable drive shaft embedded in the bottom of the fixed template, a first drive gear concentrically sleeved and fixed on the drive shaft and movably disposed inside the fixed template, and two horizontally movably embedded in the bottom of the fixed template, each having the function of forward and backward translation and respectively meshing with the upper and lower sides of the first drive gear. The front end of the upper first drive rack is connected to the bottom of the active slider, and the rear end of the lower first drive rack is connected to the bottom of the driven slider. It also includes a second driven slider that is movably connected to the right edge of the top of the fixed template to have a left and right translation function, a first core plate that is horizontally fixed to the outer wall of the left side of the second driven slider, and a first transmission plate that is horizontally and movably embedded in the bottom of the fixed template to have a left and right translation function and connected to the second driven slider. The first transmission plate is located below the second driven slider and to the right of a first transmission rack above it. A first extension plate is formed laterally on the right side of the first transmission rack above. The left side of the first transmission plate is movably connected to the right side of the first extension plate to enable it to move linearly with relative tilting.
2. The demolding transmission assembly for a plastic molding die according to claim 1, characterized in that, It also includes two lateral traction units, which are respectively arranged on the left and right and are both located to the left of the first driven slider and connected to the drive shaft. The lateral traction unit includes a third driven slider that is movably connected to the rear edge of the top of the fixed template to have the function of forward and backward translation, a second transmission gear that is concentrically sleeved and fixed on the drive shaft and movably arranged inside the fixed template, and a second transmission rack that is transversely and movably embedded in the bottom of the fixed template to have the function of forward and backward translation and meshes with the upper or lower side of the second transmission gear. The rear end of the second transmission rack is connected to the bottom of the third driven slider.
3. The demolding transmission assembly for a plastic molding die according to claim 2, characterized in that, It also includes a fourth driven slider that is movably connected to the top left edge of the fixed template to have left and right translation function, and a second transmission plate that is horizontally and movably embedded in the bottom of the fixed template to have left and right translation function and connected to the fourth driven slider. The second transmission plate is located below the fourth driven slider and to the left of a lateral traction unit on the left.
4. The demolding transmission assembly for a plastic molding die according to claim 3, characterized in that, In a lateral traction unit on the left, a second extension plate is formed on the left side of the second transmission rack, and the right side of the second transmission plate is movably connected to the left side of the second extension plate to enable it to move linearly with relative tilting.
5. The demolding transmission assembly for a plastic molding die according to claim 2, characterized in that, The front outer wall of the third driven slider in the left and right lateral traction units is also fixed with an insert block and a second core plate, respectively.
6. The demolding transmission assembly for a plastic molding die according to claim 3, characterized in that, A second core seat is also fixed on the right outer wall of the fourth driven slider.
7. The demolding transmission assembly for a plastic molding die according to claim 3, characterized in that, A vertically arranged guide plate is fixed between the bottom of the active slider and the front end of the upper first transmission rack, between the bottom of the first driven slider and the rear end of the lower first transmission rack, between the bottom of the second driven slider and the first transmission plate, between the bottom of the third driven slider in each lateral traction unit and the rear end of the second transmission rack, and between the bottom of the fourth driven slider and the second transmission plate. Each guide plate is movably inserted and connected in the fixed template to have the function of forward and backward or left and right translation.