Injection mold for a polygonal profile
By setting guide sleeve mounting grooves and guide pillars in the injection mold with polygonal grooves, increasing venting holes to improve guidance and heat dissipation, and designing interconnected gates, runners and feed channels, the problems of insufficient guidance and poor heat dissipation are solved, and injection efficiency is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAISHENG MASCH TECH (NANTONG) CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-07
AI Technical Summary
Existing injection molds with polygonal grooves suffer from problems such as insufficient guidance, poor heat dissipation, and low injection efficiency.
Guide sleeve mounting slots are set between the various protruding areas of the polygonal mold cavity, and L-shaped and straight vent holes are added through the cooperation of guide sleeves and guide pillars to improve guiding and heat dissipation performance. At the same time, the gate, runner and feed channel are designed to be interconnected to ensure uniform feeding.
It improves the guiding and heat dissipation performance of polygonal mold grooves, extends the service life of guide pillars and guide sleeves, and improves injection molding efficiency.
Smart Images
Figure CN224465154U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, specifically to an injection mold with a polygonal mold groove. Background Technology
[0002] Injection molds are specialized tools used in the plastic injection molding process. They are used to inject molten plastic into a mold cavity, which then cools and solidifies to obtain the finished product. They are widely used in the production of plastic parts and products, and are particularly suitable for mass production of products with complex geometries and high precision requirements, such as automotive parts, electronic casings, home appliances, and toys.
[0003] Currently, injection molds with polygonal molded grooves generally use four guide pillars for guidance. This leads to insufficient guidance in the middle part of the mold, and the guide pillars and guide sleeves may have a reduced service life due to poor heat dissipation. At the same time, injection is generally carried out through a single feeding channel. When the material flows from the center to the periphery in the polygonal molded groove, it may cause insufficient filling on the periphery. Therefore, it is necessary to increase the injection time, which leads to a decrease in injection efficiency. Therefore, there is an urgent need for an improved technology to solve this problem in the existing technology. Utility Model Content
[0004] The purpose of this invention is to provide an injection mold with a polygonal groove to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection mold with a polygonal mold groove, comprising a top plate, a support plate, an upper mold base, a lower mold base, and a bottom plate. The support plate is connected to the lower surface of the top plate, and the upper mold base is connected to the lower surface of the support plate. The lower mold base is mounted on the lower surface of the bottom plate via several connecting posts. The lower mold base and the upper mold base cooperate with each other. A polygonal mold groove is formed on the lower surface of the upper mold base, and a polygonal punch is formed on the upper surface of the lower mold base. The polygonal punch matches the polygonal mold groove. Several protruding areas are evenly distributed in the polygonal mold groove. Several guide sleeve mounting grooves are formed between each pair of protruding areas on the upper mold base, and guide sleeves are mounted in the guide sleeve mounting grooves. Several guide post mounting grooves are formed on the lower mold base. The positions of the column mounting slots correspond one-to-one with the positions of the guide sleeve mounting slots. Several guide columns are provided in the guide column mounting slots. The guide columns correspond one-to-one with the guide sleeves and guide each other. The upper mold base has L-shaped vent holes at the inner end of each guide sleeve mounting slot. The lower mold base has straight vent holes at each guide column mounting slot. The outer end of the L-shaped vent holes is connected to the outside of the side wall of the upper mold base. The outer end of the straight vent holes is connected to the outside of the bottom of the lower mold base. The top plate is provided with a gate. The support plate has runners. Several grooves are provided on the upper surface of the upper mold base. A feed channel is vertically provided at the outer end of each groove on the upper mold base. The feed channel is connected to each protruding area of the polygonal mold groove. The gate, runner, groove and feed channel are interconnected.
[0006] Preferably, the present invention provides an injection mold for a polygonal mold groove, wherein the upper surface of the support plate is provided with a movable cavity, a push plate is provided in the movable cavity, an ejector pin is provided on the lower surface of the push plate, and the ejector pin passes through the upper mold base.
[0007] Preferably, the present invention provides an injection mold for a polygonal mold groove, wherein the top plate has a through hole that communicates with the movable cavity.
[0008] Preferably, the present invention provides an injection mold with a polygonal mold groove, wherein both the upper mold base and the lower mold base are provided with several cooling water channels.
[0009] Preferably, the present invention provides an injection mold for a polygonal mold groove, wherein the guide post is installed in the guide post mounting groove by a threaded pressure ring.
[0010] Preferably, the present invention provides an injection mold for a polygonal mold groove, wherein the bottom of the guide post is provided with a boss, the guide post is installed in the guide post mounting groove by a threaded pressure ring, and the threaded pressure ring is pressed on the boss.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] (1) A guide sleeve mounting groove is set between each protruding area of the polygonal mold groove, and the guide sleeve cooperates with the guide rod to ensure the guidance of each protruding area of the polygonal mold groove, so as to ensure that the sealing performance will not be insufficient due to poor guidance in a certain protruding area of the polygonal mold groove.
[0013] (2) Each guide sleeve mounting groove is provided with an L-shaped vent hole, and each guide post mounting groove is provided with a straight vent hole, which greatly improves the heat dissipation and venting performance of the guide post. This ensures the smooth fit between the guide post and the guide sleeve, and also improves the service life of the guide post and the guide sleeve.
[0014] (3) The gate, runner, groove and feed channel are interconnected, and the feed channel is interconnected with each of the protruding areas of the polygonal mold groove, so as to ensure that each of the protruding areas of the polygonal mold groove can be fed at the same time, thereby improving the injection molding efficiency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a top-view perspective diagram of the upper mold base structure.
[0017] Figure 3 This is a top view of the lower mold base structure.
[0018] In the diagram: Top plate 1, Support plate 2, Upper mold base 3, Lower mold base 4, Base plate 5, Connecting pillar 6, Polygonal mold groove 7, Protruding area 701, Polygonal punch 8, Guide sleeve mounting groove 9, Guide sleeve 10, Guide pillar mounting groove 11, Guide pillar 12, L-shaped vent hole 13, Straight vent hole 14, Gate 15, Runner 16, Groove 17, Feed channel 18, Movable cavity 19, Push plate 20, Ejector pin 21, Through hole 22, Cooling water channel 23, Threaded pressure ring 24. Detailed Implementation
[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0020] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0021] Please see Figure 1-3This utility model provides a technical solution: an injection mold for a polygonal mold groove, including a top plate 1, a support plate 2, an upper mold base 3, a lower mold base 4, and a bottom plate 5. The support plate 2 is connected to the lower surface of the top plate 1, and the upper mold base 3 is connected to the lower surface of the support plate 2. A movable cavity 19 is formed on the upper surface of the support plate 2, and a push plate 20 is provided in the movable cavity 19. An ejector pin 21 is provided on the lower surface of the push plate 20. The ejector pin 21 passes through the upper mold base 3. Through the push plate 20 with ejector pins, the material is ejected from the polygonal mold groove 7 after molding by the ejector pins 21. A through hole 22 is formed in the top plate 1, and the through hole 22 communicates with the movable cavity 19. This allows the connecting rod of the external pushing mechanism to pass through the through hole 22 and connect with the push plate 20. A lower mold base 4 is provided on the lower surface of the base plate 5 via several connecting pillars 6. The lower mold base 4 cooperates with the upper mold base 3. A polygonal mold groove 7 is formed on the lower surface of the upper mold base 3. A polygonal punch 8 is provided on the upper surface of the lower mold base 4. The polygonal punch 8 matches the polygonal mold groove 7. Several protruding areas 701 are evenly distributed in the polygonal mold groove 7. Several guide sleeve mounting grooves 9 are formed between each pair of protruding areas 701 in the upper mold base 3. Guide sleeves 10 are provided in the guide sleeve mounting grooves 9. Several guide post mounting grooves 11 are formed on the lower mold base 4. The positions of the guide pins 12 and guide sleeves 10 are respectively located in the guide pin mounting grooves 9. Several guide pins 12 are provided in the guide pin mounting grooves 11, and each guide pin 12 corresponds to and guides the guide sleeve 10. A boss is provided at the bottom of each guide pin 12. The guide pin 12 is installed in the guide pin mounting groove 11 via a threaded pressure ring 24, which presses against the boss. Because bolts cannot be used to install the guide pins 12 due to the need for straight vent holes 14, threaded pressure rings 24 are used to install the guide pins 12. The upper mold base 3 has L-shaped vent holes 13 at the inner end of each guide sleeve mounting groove 9, and the lower mold base 4 has straight vent holes 14 at each guide pin mounting groove 11. The outer end of the vent 13 is connected to the outside of the side wall of the upper mold base 3, and the outer end of the straight vent 14 is connected to the outside of the bottom of the lower mold base 4. The top plate 1 is provided with a gate 15, the support plate 2 is provided with a runner 16, the upper surface of the upper mold base 3 is provided with several grooves 17, and the upper mold base 3 is provided with a feed channel 18 at the outer end of each groove 17. The feed channel 18 is connected to each protruding area 701 of the polygonal mold groove 7. The gate 15, the runner 16, the grooves 17 and the feed channel 18 are connected to each other. Several cooling water channels 23 are provided inside the upper mold base 3 and the lower mold base 4 to cool the mold.
[0022] Installation method and operating principle: An L-shaped vent hole 13 is opened at the inner end of the guide sleeve mounting groove 9 of the upper die base 3, and a straight vent hole 14 is opened in the guide post mounting groove 11 of the lower die base 4. Then, the guide sleeve 10 is installed in the guide sleeve mounting groove 9, and the guide post 12 is installed in the guide post mounting groove 11 through the threaded pressure ring 24. Subsequently, the base plate 5 is connected to the lower die base 4 using the connecting post 6, and the push plate 20 with ejector pin 21 is installed in the movable cavity 19 of the support plate 2. The top plate 1, support plate 2, and upper die base 3 are fastened together with bolts to complete the installation. In use, the base plate 5 is connected to the press, the gate 15 of the top plate 1 is connected to the extruder head, and the push mechanism for unloading is connected to the push plate 20 through the through hole 22. During operation, the mold is first closed, the guide pillar 12 is inserted into the guide sleeve 10, and the material is squeezed from the gate 15 into the runner 16, and then distributed from the runner 16 into various grooves 17 and feed channels 18, until it enters the polygonal mold cavity 7 from multiple areas simultaneously, completing the injection molding. After the material cools, the mold is opened, and the material is unloaded through the push plate 20 and ejector pins 21. This utility model has a reasonable structure. First, guide sleeve mounting grooves 9 are set between the various protruding areas 701 of the polygonal mold groove 7, and guide sleeves 10 cooperate with guide rods to ensure the guiding of each protruding area 701 of the polygonal mold groove 7, thereby ensuring that there is no insufficient sealing due to poor guiding at a certain protruding area 701 of the polygonal mold groove 7. Each guide sleeve mounting groove 9 has an L-shaped vent hole 13 at its inner end, and each guide post mounting groove 11 has a straight vent hole 14, which greatly improves the heat dissipation and venting performance of the guide post 12 and guide sleeve 10. This ensures the smooth cooperation between the guide post 12 and guide sleeve 10 and extends the service life of the guide post 12 and guide sleeve 10. The gate 15, runner 16, groove 17 and feed channel 18 are interconnected, and the feed channel 18 is interconnected with each protruding area 701 of the polygonal mold groove 7, thereby ensuring that each protruding area 701 of the polygonal mold groove 7 can be fed at the same time, improving injection molding efficiency.
[0023] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.
[0024] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. An injection mold with a polygonal groove, characterized in that: The system includes a top plate (1), a support plate (2), an upper mold base (3), a lower mold base (4), and a bottom plate (5). The support plate (2) is connected to the lower surface of the top plate (1), and the upper mold base (3) is connected to the lower surface of the support plate (2). The lower mold base (4) is provided on the lower surface of the bottom plate (5) through several connecting columns (6). The lower mold base (4) and the upper mold base (3) cooperate with each other. A polygonal mold groove (7) is opened on the lower surface of the upper mold base (3), and a polygonal punch is provided on the upper surface of the lower mold base (4). 8) The polygonal punch (8) and the polygonal mold groove (7) are matched with each other. The polygonal mold groove (7) is evenly provided with a number of protruding areas (701). The upper mold base (3) is provided with a number of guide sleeve mounting grooves (9) between each pair of protruding areas (701). The guide sleeve mounting grooves (9) are provided with guide sleeves (10). The lower mold base (4) is provided with a number of guide post mounting grooves (11). The positions of the guide post mounting grooves (11) correspond one-to-one with the positions of the guide sleeve mounting grooves (9). A plurality of guide posts (12) are provided in the guide post mounting groove (11). The guide posts (12) correspond one-to-one with the guide sleeves (10) and guide each other. The upper mold base (3) is provided with L-shaped vent holes (13) at the inner end of each guide sleeve mounting groove (9). The lower mold base (4) is provided with straight vent holes (14) at each guide post mounting groove (11). The outer end of the L-shaped vent hole (13) is connected to the outside of the side wall of the upper mold base (3). The outer end of the straight vent hole (14) is connected to the bottom of the lower mold base (4). The parts are interconnected. The top plate (1) is provided with a gate (15). The support plate (2) is provided with a runner (16). The upper mold base (3) is provided with several grooves (17) on its upper surface. The upper mold base (3) is provided with a feeding channel (18) at the outer end of each groove (17). The feeding channel (18) is interconnected with each protruding area (701) of the polygonal mold groove (7). The gate (15), runner (16), groove (17) and feeding channel (18) are interconnected.
2. The injection mold for a polygonal groove according to claim 1, characterized in that: The upper surface of the support plate (2) is provided with a movable cavity (19), a push plate (20) is provided in the movable cavity (19), and an ejector pin (21) is provided on the lower surface of the push plate (20). The ejector pin (21) passes through the upper mold base (3).
3. The injection mold for a polygonal groove according to claim 1, characterized in that: The top plate (1) has a through hole (22) that is connected to the movable cavity (19).
4. The injection mold for a polygonal groove according to claim 1, characterized in that: Both the upper mold base (3) and the lower mold base (4) are provided with several cooling water channels (23).
5. The injection mold for a polygonal groove according to claim 1, characterized in that: The bottom of the guide post (12) is provided with a boss. The guide post (12) is installed in the guide post mounting groove (11) by a threaded pressure ring (24). The threaded pressure ring (24) is pressed against the boss.