A mistake-proofing precision injection mold cavity positioning structure

Abstract

The utility model discloses a kind of precision injection mould cavity positioning structures of mistake-proofing, it is related to injection mould technical field, including lower die holder, outer shell, the upper side of the lower die holder is provided with lower mould, the upper side of the lower mould is provided with upper mould, the top of the upper mould is connected with the output end of servo air cylinder, the outside of the outer shell is provided with injection mechanism, the outside of the lower mould is connected with the injection mechanism by the butt joint lever of the outside of mould core one and the butt joint through-hole of the symmetric setting of mould core two, and then the butt joint of mould core one and mould core two is carried out, the one side of mould core two is connected with injection tube and penetrates, the lower side of mould core two is provided with cooling mechanism.The utility model is positioned seat by the bar of the outside of mould core two symmetric distribution, and the top of remaining two groups of butt joint lever is bolt fastening connection, the pre-tightening force effect of the structure restraint and bolt of positioning seat, the accurate positioning of mould core two and butt joint lever and assembly stability guarantee are realized.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically a precision injection mold cavity positioning structure to prevent incorrect assembly. Background Technology

[0002] Precision injection molding, as a key technology in the high-end manufacturing field, is widely used in industries such as automotive parts, electronic information, and medical health. These products have extremely high requirements for cavity dimensional accuracy, surface quality, and batch consistency. As the core carrier of injection molding, the precise assembly and stable temperature control of the mold cavity directly affect the product quality.

[0003] Currently, when using multi-core combination molds for assembly, problems such as reverse installation and misalignment of the mold cores often occur due to manual operation or a single positioning reference. This leads to poor cavity closure, severe flash, or dimensional deviations, requiring frequent machine stops for calibration or even scrapping of products, which seriously affects production efficiency. After injection molding, the mold needs to be cooled quickly and evenly to avoid deformation or warping of the product due to uneven shrinkage. Traditional molds mostly rely on a single water cooling or air cooling system, which has heat dissipation blind spots, long cooling time, and local overheating can easily lead to inconsistent solidification of the preform, further aggravating dimensional deviations. Utility Model Content

[0004] The purpose of this invention is to provide a precision injection mold cavity positioning structure to prevent incorrect assembly, thereby solving the problems raised in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precision injection mold cavity positioning structure for preventing incorrect assembly, comprising a lower mold base, an outer housing, a mold core one, and a mold core two. A lower mold is disposed directly above the lower mold base, and an upper mold is disposed directly above the lower mold. The top of the upper mold is connected to the output end of a servo cylinder. An injection mechanism is disposed on the outer side of the outer housing. The injection mechanism is connected to the outer side of the lower mold through a connecting rod disposed on the outer side of mold core one and symmetrically disposed connecting through holes in mold core two, thereby connecting and guiding mold core one and mold core two to prevent incorrect assembly of the cavity. An injection tube is connected through one side of mold core two. A cooling mechanism is disposed directly below mold core two. The cooling mechanism operates in conjunction with a plate fan and a water-cooling coil disposed at the bottom to circulate and cool the materials inside mold core one and mold core two.

[0006] As a preferred technical solution, the injection molding mechanism includes an upper mold base, a connecting rod, a rod positioning seat, a mold core one, a mold core two, and a connecting through hole. An outer housing is provided directly below the upper mold base. Mold core one is provided inside the outer housing. Mold core one is provided on one side. The bottom end of the rod positioning seat is symmetrically provided on the mold core one. A connecting rod is connected through the outer side of the rod positioning seat. The bottom end of the connecting rod engages with the groove inside the lower mold. The bottom end of mold core two is symmetrically provided with connecting rods. The top end of mold core two is connected to the bottom end of the upper mold base provided at the top of the upper mold.

[0007] As a preferred technical solution, the lower mold forms a precise engagement connection with the pre-set snap-fit ​​part at the bottom of the mold core two through the symmetrically arranged docking rods inside it.

[0008] As a preferred technical solution, the rod positioning seats symmetrically arranged on the outer side of the mold core are fastened to the top of the other two sets of connecting rods with bolts.

[0009] As a preferred technical solution, the cooling mechanism includes an outer casing, a lower mold, a water-cooling coil, an air-cooling chamber, and a plate fan. The lower mold is located directly below the outer casing, and a lower mold base is located directly below the lower mold. The water-cooling coil is located inside the lower mold base. The air-cooling chamber is located inside the lower mold, and two sets of plate fans are connected to one side of the air-cooling chamber.

[0010] As a preferred technical solution, the air-cooled chamber formed inside the lower mold is connected to two sets of plate fans arranged on one side in a through-flow fluid conduction connection.

[0011] As a preferred technical solution, the water-cooling coils pre-embedded inside the lower mold and the bottom surface of the air-cooling chamber are arranged in a close fit.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses symmetrically arranged rod positioning seats on the outer side of the mold core two, which are fastened to the top of the other two sets of connecting rods with bolts. Through the structural constraint of the positioning seats and the pre-tightening force of the bolts, the precise positioning of the mold core two and the connecting rods are achieved and the assembly stability is guaranteed. This effectively avoids the mold core two from shifting or misaligning during the mold closing process. The water cooling coil is embedded in the lower mold base, and the air cooling chamber is integrated into the lower mold. The cooling channel is integrated with the mold body, with no exposed pipes, reducing the risk of coolant leakage. During maintenance, only the water cooling or air cooling system needs to be cleaned separately, making the operation convenient.

[0013] 2. This utility model adopts a close fit layout between the water-cooling coil pre-embedded inside the lower mold base and the bottom surface of the air-cooling chamber. The water cooling and air cooling work together to form a highly efficient heat dissipation network covering the entire mold, which significantly shortens the cooling time and avoids deformation or shrinkage of the blank caused by local overheating. Relying on the high thermal conductivity of the mold base metal substrate, a continuous heat conduction channel is constructed to realize the coordinated heat dissipation of the liquid cooling system and the air cooling system, effectively improving the overall cooling uniformity and heat exchange efficiency of the mold. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present utility model; Figure 2 This is a schematic diagram of the connection structure between mold core one and mold core two of this utility model; Figure 3 This is a schematic diagram of the injection molding mechanism of this utility model; Figure 4 This is a schematic diagram of the cooling mechanism of this utility model.

[0015] The components include: 1. Lower mold base; 2. Lower mold; 3. Outer housing; 4. Upper mold; 5. Upper mold base; 6. Servo cylinder; 7. Injection mechanism; 8. Connecting rod; 9. Rod positioning seat; 10. Mold core one; 11. Mold core two; 12. Injection tube; 13. Connecting through hole; 14. Water cooling coil; 15. Air cooling chamber; 16. Plate fan; 17. Cooling mechanism. Detailed Implementation

[0016] The technical solutions of the present 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 the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Figures 1 to 4As shown, this utility model provides the following technical solution: a precision injection mold cavity positioning structure for preventing incorrect assembly, including a lower mold base 1, an outer housing 3, a first mold core 10, and a second mold core 11. A lower mold 2 is arranged directly above the lower mold base 1, and an upper mold 4 is arranged directly above the lower mold 2. The top of the upper mold 4 is connected to the output end of a servo cylinder 6. An injection molding mechanism 7 is arranged on the outside of the outer housing 3. The injection molding mechanism 7 is connected to a connecting rod 8 arranged on the outside of the first mold core 10 and the second mold core 11. The symmetrically arranged through holes 13 of the mold 1 connect to the outer side of the lower mold 2, thereby connecting and guiding the mold core 10 and the mold core 2, preventing the mold core 10 and the mold core 2 from being installed in reverse. A material injection pipe 12 is connected through one side of the mold core 2. A cooling mechanism 17 is arranged directly below the mold core 2. The cooling mechanism 17 works in coordination with the plate fan 16 at the bottom and the water cooling coil 14 to circulate and cool the materials inside the mold core 10 and the mold core 2.

[0018] like Figure 1 , Figure 2 and Figure 3 As shown, the injection molding mechanism 7 includes an upper mold base 5, connecting rods 8, rod positioning seats 9, mold core one 10, mold core two 11, and connecting through holes 13. An outer housing 3 is provided directly below the upper mold base 5. Mold core one 10 is provided inside the outer housing 3. Mold core one 10 is provided on one side of mold core one 10. The bottom end of the rod positioning seat 9 is symmetrically arranged on the mold core one 10. The connecting rod 8 is connected through the outer side of the rod positioning seat 9. The bottom end of the connecting rod 8 engages with the internal groove of the lower mold 2. The bottom end of the mold core two 11 is symmetrically arranged with connecting rods 8. The top end of the mold core two 11 is connected to the bottom end of the upper mold base 5 located at the top of the upper mold 4. The lower mold 2 forms a precise engagement connection with the pre-set engaging part at the bottom of the mold core two 11 through the symmetrically arranged connecting rods 8 inside it. The rod positioning seats 9 symmetrically arranged on the outer side of the mold core one 10 are fastened to the top ends of the other two sets of connecting rods 8 by bolts.

[0019] Among them, when the mold core 2 11 is placed in the correct direction, its symmetrically opened docking through holes 13 can be smoothly inserted with the docking rod 8 on the outside of the mold core 10. When installed in the opposite direction, the docking will fail due to the displacement of the through hole position, thus forming a physical error prevention system. It can avoid low-level misinstallation without additional manual inspection. The docking rods 8 symmetrically arranged inside the lower mold 2 precisely engage with the bottom locking part of the mold core 2 11, further fixing the vertical position of the mold core 2 11 and preventing accidental displacement caused by mold handling or mold closing vibration, thus strengthening the error prevention redundancy.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the cooling mechanism 17 includes an outer casing 3, a lower mold 2, a water-cooling coil 14, an air-cooling chamber 15, and a plate fan 16. The lower mold 2 is located directly below the outer casing 3, and a lower mold base 1 is located directly below the lower mold 2. The water-cooling coil 14 is installed inside the lower mold base 1. The air-cooling chamber 15 is located inside the lower mold 2, and two sets of plate fans 16 are connected to one side of the air-cooling chamber 15. The air-cooling chamber 15, which is formed inside the lower mold 2, and the two sets of plate fans 16 arranged on one side form a through-flow fluid conduction connection. The water-cooling coil 14 pre-embedded inside the lower mold base 1 and the bottom surface of the air-cooling chamber 15 are arranged in a close fit.

[0021] Among them: the upper mold 4 descends along a fixed trajectory through guide pillars, and with the closed-loop control of the servo cylinder 6, the mold closing speed and pressure are stable, further reducing the slight displacement of mold core 10 and mold core 2 11 caused by the impact of mold closing, and improving the cavity centering. The water cooling coil 14 of the lower mold base 1 removes the heat from the bottom of the mold through the heat conduction of the metal substrate. The air cooling chamber 15 of the lower mold 2 removes the heat from the sides and top by driving cold air through the plate fan 16. The continuity of water cooling and the uniformity of air cooling work together to avoid local overheating of the mold.

[0022] The working principle of this utility model is as follows: the servo cylinder 6 drives the upper mold 4 to descend along the guide post and close with the lower mold 2 to form a complete cavity. During this process, the precise assembly of mold core 10 and mold core 2 relies on the following error-proof positioning mechanism: the docking rod 8 on the outside of mold core 10 cooperates with the docking through hole 13 symmetrically opened on mold core 2 to form a guide and limit structure. Only when mold core 2 is placed in the correct direction can the docking rod 8 be smoothly inserted into the docking through hole 13, thus physically restricting the reverse installation of mold core 2 11.

[0023] The symmetrically arranged connecting rods 8 inside the lower mold 2 precisely engage with the pre-set snap-fit ​​parts such as grooves or bosses at the bottom of the mold core 2 11, further fixing the vertical position of the mold core 2 11 and preventing misalignment due to force displacement during mold closing; the rod positioning seats 9 symmetrically arranged on the outside of the mold core 10 are fastened to the top of the other two sets of connecting rods 8 by bolts, and the bolt preload is used to strengthen the connection rigidity between the mold core 10 and the connecting rods 8, preventing the mold core 10 from displacing due to vibration or pressure during mold closing. The injection mechanism 7 injects molten plastic into the closed cavity through the injection tube 12 that passes through one side of the mold core 2 11. Under high pressure, the molten plastic fills the gap between the mold core 10 and the mold core 2 11, and finally completely covers the cavity to form a blank consistent with the product design. The water-cooling coil 14 embedded inside the lower mold 2 is circulated with a cooling liquid such as water or cooling oil. Through the high thermal conductivity of the metal substrate, the heat absorbed by the blank in the lower mold 2 is conducted to the water-cooling coil 14. After being cooled by the external cooling system, it is circulated back, continuously removing heat from the bottom of the mold. The air-cooling chamber 15 inside the lower mold 2 is connected to two sets of plate fans 16 arranged on one side. The fans drive the external cold air to flow through the air-cooling chamber 15 at high speed, and intensely exchange heat with the side and top surfaces of the mold, further reducing the internal material temperature of mold core 10 and mold core 2 11. After the blank is completely solidified, the servo cylinder 6 drives the upper mold 4 to move upward, and mold core 10 and mold core 2 11 separate from each other. Due to the precision of the positioning structure, there is no misalignment residue between mold core 10 and mold core 2 11, and the product can be smoothly ejected from the cavity with consistent dimensions and stable surface quality.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A precision injection mold cavity positioning structure for preventing incorrect assembly, comprising a lower mold base (1), an outer housing (3), a first mold core (10), and a second mold core (11), wherein a lower mold (2) is disposed directly above the lower mold base (1), and an upper mold (4) is disposed directly above the lower mold (2), and the top end of the upper mold (4) is connected to the output end of a servo cylinder (6), characterized in that: An injection molding mechanism (7) is provided on the outer side of the outer casing (3). The injection molding mechanism (7) is connected to the outer side of the lower mold (2) through the docking rod (8) provided on the outer side of the mold core one (10) and the docking through hole (13) symmetrically provided on the mold core two (11), thereby docking and guiding the mold core one (10) and the mold core two (11) to prevent the mold core one (10) and the mold core two (11) from being installed in reverse. An injection tube (12) is connected through one side of the mold core two (11). A cooling mechanism (17) is provided directly below the mold core two (11). The cooling mechanism (17) works in coordination with the plate fan (16) at the bottom and the water cooling coil (14) to circulate and cool the materials inside the mold core one (10) and the mold core two (11).

2. The precision injection mold cavity positioning structure for preventing incorrect assembly according to claim 1, characterized in that: The injection molding mechanism (7) includes an upper mold base (5), a connecting rod (8), a rod positioning seat (9), a mold core one (10), a mold core two (11), and a connecting through hole (13). An outer cover shell (3) is provided directly below the upper mold base (5). A mold core one (10) is provided inside the outer cover shell (3). A mold core one (10) is provided on one side of the mold core one (10). The bottom end of the rod positioning seat (9) is symmetrically provided on the mold core one (10). A connecting rod (8) is connected through the outer side of the rod positioning seat (9). The bottom end of the connecting rod (8) is engaged with the groove inside the lower mold (2). A connecting rod (8) is symmetrically provided at the bottom end of the mold core two (11). The top end of the mold core two (11) is connected to the bottom end of the upper mold base (5) provided at the top of the upper mold (4).

3. The precision injection mold cavity positioning structure for preventing incorrect assembly according to claim 2, characterized in that: The lower mold (2) forms a precise engagement connection with the pre-set snap-fit ​​part at the bottom of the mold core (11) through the symmetrically arranged docking rods (8) inside it.

4. The precision injection mold cavity positioning structure for preventing incorrect assembly according to claim 2, characterized in that: The rod positioning seats (9) symmetrically arranged on the outer side of the mold core (10) are fastened to the top of the other two sets of connecting rods (8) by bolts.

5. The precision injection mold cavity positioning structure for preventing incorrect assembly according to claim 1, characterized in that: The cooling mechanism (17) includes an outer casing (3), a lower mold (2), a water-cooled coil (14), an air-cooled chamber (15), and a plate fan (16). The lower mold (2) is located directly below the outer casing (3), and a lower mold base (1) is located directly below the lower mold (2). The water-cooled coil (14) is located inside the lower mold base (1). The air-cooled chamber (15) is located inside the lower mold (2), and two sets of plate fans (16) are connected to one side of the air-cooled chamber (15).

6. The precision injection mold cavity positioning structure for preventing incorrect assembly according to claim 5, characterized in that: The air-cooled chamber (15) formed inside the lower mold (2) forms a through-flow fluid connection with two sets of plate fans (16) arranged on one side.

7. The precision injection mold cavity positioning structure for preventing incorrect assembly according to claim 6, characterized in that: The water-cooling coil (14) pre-embedded inside the lower mold (2) and the bottom surface of the air-cooling chamber (15) are arranged in a close fit.

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