Mold system without injection molding runner
By setting through holes in the mold cavity to match the nozzle, the problem of runnerless injection molding is solved, thus achieving efficient and low-cost injection molding production and enhancing the competitiveness of enterprises.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HI-P (SUZHOU) ELECTRONICS TECH CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional injection molds generate a large amount of waste material after each injection, resulting in increased production costs and reduced production efficiency. Furthermore, the complex post-processing hinders automated production.
The mold system using a runnerless design eliminates runners and gates by setting through holes in the mold that communicate with the cavity and cooperating with the nozzles of the hot runner injection system. This allows the nozzles to directly extend into the edge of the cavity, eliminating runners and gates and directly forming the product, thus avoiding the formation of solidified material in runners and gates.
Reduce raw material waste, lower production costs, shorten injection molding cycles, improve production efficiency, automate and intelligentize injection molding production, and simplify post-processing procedures.
Smart Images
Figure CN224145219U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, and in particular to a mold system without injection runners. Background Technology
[0002] Injection molding is a crucial processing method in the production of plastic products. Traditional injection molds typically include main runners, branch runners, and gates. While these structures play a key role in the transfer of molten plastic, they also have significant drawbacks. After each injection molding process, these non-product parts, such as the runners and gates, generate a large amount of waste material that must be removed from the plastic part. This process not only wastes a significant amount of resin raw materials, increasing production costs, but also prolongs the molding cycle and reduces production efficiency. Furthermore, waste removal often requires post-processing, further increasing labor and time costs, and also hindering automated production.
[0003] With the rapid development of the plastic products market, higher demands are being placed on the efficiency, cost, and quality of injection molding. To address these challenges, runnerless molds have become a research hotspot. Runnerless molds aim to avoid the generation of condensed material in the runner through innovative design and technology, thereby achieving higher efficiency, lower cost, and automation in the injection molding process. The emergence of such molds is expected to fundamentally solve the problems existing in traditional runner molds, bringing new development opportunities to specialty plastic products. Utility Model Content
[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a mold system without injection runners, so as to solve the problem that the injection runners and gates of the existing molds generate a lot of waste, which leads to increased production costs and reduced production efficiency.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] This utility model provides a mold system without injection runners, including a mold and a hot runner injection system. The mold is provided with a cavity and a through hole communicating with the cavity. The hot runner injection system is provided with a nozzle that cooperates with the through hole.
[0007] During injection molding, one end of the nozzle extends into the through hole and is located at the edge of the cavity.
[0008] Furthermore, both the nozzle and the through hole are tapered structures and gradually decrease in size in the direction toward the cavity.
[0009] Furthermore, the mold includes a fixed mold core, a moving mold core, a moving mold slider, and a moving mold mandrel. The moving mold core can move up and down relative to the fixed mold core, the moving mold slider can move left and right relative to the moving mold core, and the moving mold mandrel can move up and down relative to the moving mold slider. The fixed mold core, the moving mold core, the moving mold slider, and the moving mold mandrel are combined to form the cavity.
[0010] Furthermore, the through hole is located on the side of the fixed mold core, and the hot runner injection system can move left and right relative to the fixed mold core.
[0011] Furthermore, the side of the fixed mold core is provided with a limiting groove, and the hot runner injection system cooperates with the limiting groove.
[0012] Furthermore, the moving mold core has a protrusion on the side facing the fixed mold core, and the fixed mold core has a groove on the side facing the moving mold core, with the protrusion and the groove cooperating with each other.
[0013] Furthermore, the protrusion is provided with a mounting hole, which is connected to the cavity, and the moving mold mandrel is installed in the mounting hole.
[0014] Furthermore, the moving mold core is provided with two mutually parallel protrusions, each protrusion having four mounting holes. The number of moving mold cores and cavities is eight, and the number of fixed mold cores and moving mold sliders is two. Each fixed mold core is provided with four through holes. The two fixed mold cores, the moving mold cores, the two moving mold sliders, and the eight moving mold cores are combined to form eight cavities.
[0015] The hot runner injection system comprises two systems, each with two nozzles on opposite sides.
[0016] Furthermore, the fixed mold core is provided with a receiving groove on the side facing the moving mold slider, and the moving mold slider is received in the receiving groove.
[0017] Furthermore, the moving mold slider has a mold block at one end facing the cavity, and the mold block extends into the cavity.
[0018] The beneficial effects of this utility model are as follows: By setting a through hole on the mold that communicates with the cavity, and the through hole cooperating with the nozzle on the hot runner injection system, during injection molding, one end of the nozzle can directly extend into the through hole and be located at the edge of the cavity, thereby eliminating the need to set runners and gates on the mold. The plastic in the cavity solidifies and directly forms the product, eliminating the solidified material in the runners and gates during the injection molding process, reducing material waste, and lowering production costs; shortening the injection molding cycle, improving production efficiency, and enhancing the market competitiveness of enterprises; simplifying the post-processing procedures of injection molded parts, and realizing the automation and intelligence of injection molding production. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the main structure of the mold system without injection runner in this utility model.
[0020] Figure 2 This is a bottom-view three-dimensional structural diagram of the mold system without injection runner in this utility model.
[0021] Figure 3 This is a front view split structure diagram of the mold system without injection runner in this utility model.
[0022] Figure 4 This is a side view of the mold core in this utility model.
[0023] Figure 5 This is a bottom view structural diagram of the fixed mold core in this utility model.
[0024] Figure 6 yes Figure 5 A magnified structural diagram of point A in the middle.
[0025] In the figure: mold 10, cavity 101, through hole 102, fixed mold core 11, limiting groove 111, groove 112, receiving groove 113, moving mold core 12, protrusion 121, mounting hole 122, moving mold slider 13, block 131, mounting groove 132, moving mold mandrel 14, hot runner injection system 20, nozzle 21, product 30. Detailed Implementation
[0026] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation methods, structure, features, and effects of the injection runnerless mold system proposed according to this utility model:
[0027] Figure 1 This is a schematic diagram of the main structure of the mold system without injection runner in this utility model. Figure 2 This is a bottom-view three-dimensional structural diagram of the mold system without injection runner in this utility model. Figure 3This is a front view split structure diagram of the mold system without injection runner in this utility model. Figure 4 This is a side view of the mold core in this utility model. Figure 5 This is a bottom view structural diagram of the fixed mold core in this utility model. Figure 6 yes Figure 5 A magnified structural diagram of point A in the middle.
[0028] like Figures 1 to 6 As shown, the present invention provides a mold system without injection runners, including a mold 10 and a hot runner injection system 20. The mold 10 is provided with a cavity 101. Figure 6 The hot runner injection system 20 is equipped with a nozzle 21 that cooperates with the through hole 102 and a through hole 102 that communicates with the cavity 101. During injection molding, one end of the nozzle 21 extends into the through hole 102 and is located at the edge of the cavity 101.
[0029] By providing a through hole 102 on the mold 10 that communicates with the cavity 101, and by having the through hole 102 cooperate with the nozzle 21 on the hot runner injection system 20, during injection molding, one end of the nozzle 21 can directly extend into the through hole 102 and be located at the edge of the cavity 101, thereby eliminating the need for runners and gates on the mold 10. The plastic in the cavity 101 solidifies and directly forms the product 30. Figure 3 This technology eliminates runners and gate solidification during the injection molding process, reducing raw material waste and lowering production costs; it shortens the injection molding cycle, improves production efficiency, and enhances the company's market competitiveness; it simplifies post-processing steps for injection molded parts, and realizes automation and intelligence in injection molding production.
[0030] Preferably, after the nozzle 21 extends into the through hole 102, one end of the nozzle 21 is flush with the end of the through hole 102 near the cavity 101, thereby making the product 30 more aesthetically pleasing.
[0031] Furthermore, both the nozzle 21 and the through hole 102 are tapered structures that gradually decrease in size towards the cavity 101. This facilitates the interaction between the nozzle 21 and the through hole 102, making it easier for the nozzle 21 to extend into the through hole 102. On the other hand, it limits the depth of the nozzle 21 extending into the through hole 102, ensuring that one end of the nozzle 21 extends into the through hole 102 and is located just at the edge of the cavity 101.
[0032] In this embodiment, the mold 10 includes a fixed mold core 11, a movable mold core 12, a movable mold slider 13, and a movable mold mandrel 14. The movable mold core 12 can move up and down relative to the fixed mold core 11, the movable mold slider 13 can move left and right relative to the movable mold core 12, and the movable mold mandrel 14 can move up and down relative to the movable mold slider 13. The fixed mold core 11, movable mold core 12, movable mold slider 13, and movable mold mandrel 14 are combined to form a cavity 101. The mold 10 includes a fixed mold and a movable mold. The fixed mold core 11 is mounted on the fixed mold, and the mold core 12, movable mold slider 13, and movable mold mandrel 14 are all mounted on the movable mold. The movable mold slider 13 can slide left and right on the movable mold, and the movable mold mandrel 14 can slide up and down on the movable mold to achieve the core-pulling action.
[0033] Furthermore, such as Figures 4 to 6 As shown, a through hole 102 is provided on the side of the fixed mold core 11, allowing the hot runner injection system 20 to move left and right relative to the fixed mold core 11. Optionally, a limiting groove 111 is provided on the side of the fixed mold core 11, and the hot runner injection system 20 cooperates with the limiting groove 111. The through hole 102 is located within the limiting groove 111, allowing the nozzle 21 to extend into the through hole 102 when the hot runner injection system 20 is installed within the limiting groove 111.
[0034] Furthermore, the moving mold core 12 has a protrusion 121 on the side facing the fixed mold core 11, and the fixed mold core 11 has a groove 112 on the side facing the moving mold core 12. The protrusion 121 and the groove 112 cooperate with each other. Optionally, the protrusion 121 has a mounting hole 122, which communicates with the cavity 101. The moving mold core 14 is installed in the mounting hole 122 and can slide up and down in the mounting hole 122 to achieve the core pulling action. The cavity 101 is located between the protrusion 121 and the groove 112, and the end of the moving mold core 14 further defines the shape of the cavity 101.
[0035] Furthermore, the fixed mold core 11 has a receiving groove 113 on the side facing the moving mold slider 13. The receiving groove 113 is interconnected with the groove 112, and the moving mold slider 13 is accommodated in the receiving groove 113, thereby reducing the size of the mold 10. Optionally, the end of the moving mold slider 13 facing the cavity 101 has a mold block 131, which extends into the cavity 101, thereby further defining the shape of the cavity 101. The moving mold slider 13 has a mounting groove 132, and the mold block 131 is mounted in the mounting groove 132.
[0036] In this embodiment, the moving mold core 12 has two parallel protrusions 121, each protrusion 121 having four mounting holes 122; there are eight moving mold cores 14 and eight cavities 101, each moving mold core 14 corresponding to one mounting hole 122; there are two fixed mold cores 11 and two moving mold sliders 13, each fixed mold core 11 having four through holes 102; the two fixed mold cores 11, the moving mold cores 12, the two moving mold sliders 13, and the eight moving mold cores 14 are combined to form eight cavities 101; there are two hot runner injection systems 20, each hot runner injection system 20 having two nozzles 21 on each opposite side, and the hot runner injection system 20 is positioned between the two fixed mold cores 11 to reduce the volume of the mold system. Therefore, the mold system in this embodiment can produce eight products 30 simultaneously, improving production efficiency. Understandably, the diagram only shows a fixed mold core 11, a moving mold slider 13, a hot runner injection system 20, two mold blocks 131, two moving mold spindles 14, and two products 30.
[0037] The mold closing process of the mold system in this application is as follows:
[0038] Two hot runner injection systems 20 are joined together with two fixed mold cores 11, with the hot runner injection system 20 located between the two fixed mold cores 11, such that one end of the nozzle 21 extends into the through hole 102 and is located at the edge of the cavity 101.
[0039] Slide the two moving mold sliders 13 to the positions of the two protrusions 121 on the moving mold core 12, and then close the two hot runner injection systems 20 and the two fixed mold cores 11 with the moving mold core 12.
[0040] Finally, the eight moving mold cores 14 are slid upwards and inserted into the cavity 101, thus completing the entire mold closing action.
[0041] The injection molding process of the mold system in this application is as follows:
[0042] The hot runner injection system 20 is turned on, and molten plastic is injected into the cavity 101 through the nozzle 21. During the injection molding process, through special mold design and technical means, the plastic in the runner from the nozzle 21 of the hot runner injection system 20 to the cavity 101 can remain in a liquid state. After the plastic cools and solidifies in the cavity 101, only the plastic part 30 needs to be removed, without having to deal with the solidified material in the runner, thus realizing runnerless solidified material injection molding.
[0043] The mold opening process of the mold system in this application is as follows:
[0044] The two moving mold sliders 13 retract and slide away from the moving mold core 12, so that the moving mold sliders 13 separate from the protrusion 121, and then the two hot runner injection systems 20 and the two fixed mold cores 11 open the mold with the moving mold core 12.
[0045] The eight moving mold cores 14 are slid downwards and the cavity 101 is pulled out, thereby allowing the product 30 to detach and completing the entire mold opening action. When the machine needs to be stopped for cleaning, the hot runner injection system 20 also needs to be separated from the fixed mold core 11 for cleaning purposes.
[0046] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.
[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present utility model. These are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A no-runners mold system, characterized in that, Includes a mold (10) and a hot runner injection system (20). The mold (10) is provided with a cavity (101) and a through hole (102) communicating with the cavity (101). The hot runner injection system (20) is provided with a nozzle (21) that cooperates with the through hole (102). During injection molding, one end of the nozzle (21) extends into the through hole (102) and is located at the edge of the cavity (101).
2. The no-flow mold system of claim 1, wherein, Both the nozzle (21) and the through hole (102) are tapered structures and gradually decrease in size in the direction toward the cavity (101).
3. The gate runner-free mold system of claim 1 or 2, wherein, The mold (10) includes a fixed mold core (11), a moving mold core (12), a moving mold slider (13), and a moving mold mandrel (14). The moving mold core (12) can move up and down relative to the fixed mold core (11), the moving mold slider (13) can move left and right relative to the moving mold core (12), and the moving mold mandrel (14) can move up and down relative to the moving mold slider (13). The fixed mold core (11), the moving mold core (12), the moving mold slider (13), and the moving mold mandrel (14) are combined to form the cavity (101).
4. The no-flow mold system of claim 3, wherein, The through hole (102) is provided on the side of the fixed mold core (11), and the hot runner injection system (20) can move left and right relative to the fixed mold core (11).
5. The no-flow mold system of claim 4, wherein, The fixed mold core (11) has a limiting groove (111) on its side, and the hot runner injection system (20) cooperates with the limiting groove (111).
6. The mold system without injection runners according to claim 3, characterized in that, The moving mold core (12) has a protrusion (121) on the side facing the fixed mold core (11), and the fixed mold core (11) has a groove (112) on the side facing the moving mold core (12). The protrusion (121) and the groove (112) cooperate with each other.
7. The no-flow mold system of claim 6, wherein, The protrusion (121) is provided with a mounting hole (122), which is connected to the cavity (101), and the moving mold mandrel (14) is installed in the mounting hole (122).
8. The no-flow mold system of claim 7, wherein, The moving mold core (12) is provided with two parallel protrusions (121), each protrusion (121) is provided with four mounting holes (122), the number of moving mold mandrels (14) and the number of cavities (101) are eight, the number of fixed mold cores (11) and the number of moving mold sliders (13) are two, each fixed mold core (11) is provided with four through holes (102), and the two fixed mold cores (11), the moving mold cores (12), the two moving mold sliders (13) and the eight moving mold mandrels (14) are combined to form eight cavities (101); The number of hot runner injection systems (20) is two, and each hot runner injection system (20) has two nozzles (21) on each of its opposite sides.
9. The no-flow mold system of claim 3, wherein, The fixed mold core (11) has a receiving groove (113) on the side facing the moving mold slider (13), and the moving mold slider (13) is received in the receiving groove (113).
10. The no-flow mold system of claim 9, wherein, The one end of the movable die slider (13) is provided with a mold block (131) which extends into the mold cavity (101).