Runner structure convenient for rapid forming

Abstract

The utility model relates to the technical field of injection molding of injection molding parts, and discloses a runner structure convenient for rapid forming, which comprises a sprue, a cross gate and two groups of ingates, the cross gate is arranged at the lower end of the outer side of the sprue, the two groups of ingates are arranged at the two ends of the outer side of the cross gate, and a plurality of groups of support members are distributed at equal angles. Stable support is provided for the structure, meanwhile, the inner connecting columns and the outer connecting columns are arranged in a T shape, the stability of connection with the inner columns and the outer columns is improved, the inner heat insulation pieces and the outer heat insulation pieces can further block heat transfer, further weaken heat conduction and ensure durability of the heat preservation effect, and meanwhile when a flow channel is impacted by external force or generates stress due to temperature changes, the heat insulation effect is improved. The damping piece can effectively buffer and absorb shock, avoid structural damage, maintain the dimensional accuracy of the runner and guarantee the uniformity and stability of melt flow, so that the forming quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a flow channel structure that facilitates rapid prototyping. Background Technology

[0002] In the field of injection molding, the key to achieving rapid molding of injection molded parts is to ensure that the gating system has unobstructed flow channels, low melt flow resistance, and minimal temperature loss, so that the molten plastic can quickly fill the mold cavity while avoiding cooling and solidification within the flow channels.

[0003] In existing injection molding technology, Chinese utility model patent application number CN202421219945.8 discloses a hot runner structure for injection molds, including two first hot runners opened at the top of the upper mold, an injection cavity opened at the bottom of the upper mold, a second hot runner opened inside the upper mold, the first hot runners communicating with the second hot runners, a heating element provided on the outer side of the second hot runner, a discharge port opened on the top wall of the injection cavity, the discharge port communicating with the second hot runner, side grooves opened on both opposite side walls of the discharge port, the two inner side walls in the width direction of the side grooves being coplanar with the inner side wall of the discharge port, and a heat insulation baffle slidably connected in the side grooves.

[0004] However, in the above technical solution, the heat insulation design is limited to the sliding baffle at the discharge port and fails to cover the outer area of ​​the first hot runner and the second hot runner. As a result, the molten material cools down prematurely when it comes into contact with the cold mold wall when it flows through the non-insulated section, forming a local solidified layer (about 0.5 mm thick). The rigid connection between the runner and the mold lacks a dynamic stress compensation mechanism. Under periodic thermal shock, the microcracks at the interface expand, causing the runner to deform and affecting the injection molding accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a flow channel structure that is easy to quickly form. By adjusting the shape of the connection end between the heat insulation sheet and the inner and outer columns, the stability of the connection between the heat insulation sheet and the inner and outer columns is increased, the influence of external vibration on the supporting components is reduced, and the thickness of the heat insulation sheet is increased, thereby reducing the effect on heat transfer and further optimizing the heat insulation effect, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a runner structure that facilitates rapid prototyping, comprising a sprue, a runner, and two sets of ingates. The runner is located at the lower end of the outer side of the sprue, and the two sets of ingates are located at both ends of the outer side of the runner. A sprue hopper is provided at the upper end of the sprue, a flow guide seat is provided at the bottom of the inner cavity of the sprue, and a flow guide assembly is provided at the top of the inner cavity of the sprue. Insulation components are provided on the outer sides of both the sprue and the runner, and multiple sets of support members are provided inside the insulation components, with the multiple sets of support members arranged at equal angles.

[0007] The supporting component includes an inner column, an outer column, an inner heat insulation sheet, an outer heat insulation sheet, and a damping element. One side of the inner heat insulation sheet has an integrally formed inner insertion post, and one side of the inner column has an inner stepped groove for installing the inner insertion post. One side of the outer heat insulation sheet has an integrally formed outer insertion post, and one side of the outer column has an outer stepped groove for installing the outer insertion post. The damping element is located on the opposite side of the inner and outer heat insulation sheets.

[0008] Preferably, the damping component includes a positioning cylinder and a sliding column fixedly connected to opposite sides of the inner and outer heat insulation sheets. A sliding hole is provided on one side of the positioning cylinder for the sliding column to slide. One end of the sliding column is connected to a piston plate that is slidably disposed on the inner wall of the positioning cylinder. A return spring that abuts against the piston plate is provided in the inner cavity of the positioning cylinder.

[0009] Preferably, the inner cavity of the positioning cylinder is filled with buffer solution, and multiple sets of flow holes are opened on the outer side of the piston plate, and the multiple sets of flow holes are arranged at equal angles.

[0010] Preferably, a sealing groove is provided on the inner wall of the sliding hole, and a sealing ring is embedded in the sealing groove, with the sealing ring sleeved on the outside of the sliding column.

[0011] Preferably, the insulation component includes an inner structural lining, a magnesia-carbon brick inner lining, and an outer structural lining. The magnesia-carbon brick inner lining is disposed on the inner wall of the straight and horizontal pouring channels, and the inner structural lining is disposed on the outer side of the straight and horizontal pouring channels. The inner column is fixedly connected to the outer side of the inner structural lining, and the outer column is fixedly connected to the inner wall of the outer structural lining. A vacuum chamber is formed between the outer structural lining and the inner structural lining.

[0012] Preferably, the inner wall of the outer structural liner is provided with a reflective liner, and the outer wall of the outer structural liner is provided with a shell. The shell, the outer structural liner, the reflective liner, and the inner structural liner are all cylindrical.

[0013] Preferably, the flow guiding component includes an integrally formed upper gating, a flow guiding gating, and a lower gating from top to bottom. Multiple sets of connecting columns are fixedly connected to the outer side of the upper gating, and the multiple sets of connecting columns are fixedly connected to the inner wall of the straight gating. An annular stepped cavity is provided between the upper gating and the straight gating.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model mainly utilizes the cooperation between inner columns, inner heat insulation sheets, outer columns, outer heat insulation sheets, and damping components. Multiple sets of supporting components are distributed at equal angles, which not only provides stable support for the structure, but also increases the stability of the connection with the inner and outer columns by setting both the inner and outer connecting columns in a T-shape. The inner and outer heat insulation sheets can further block the transfer of heat and further weaken the heat conduction, ensuring the durability of the heat preservation effect. At the same time, when the flow channel is subjected to external impact or stress caused by temperature changes, the damping components can effectively buffer and reduce shock, avoid structural damage, maintain the dimensional accuracy of the flow channel, ensure the uniformity and stability of the melt flow, and thus improve the molding quality.

[0016] 2. By cooperating with the flow guide component and the direct flow channel, the movement path of the melt is reduced after passing through the flow guide channel, thereby accelerating the flow effect of the melt. At the same time, the annular stepped cavity channel optimizes the melt flow path, making the melt flow more smoothly and efficiently in the flow channel, reducing flow resistance and turbulence, accelerating the filling of the cavity, greatly shortening the molding cycle, and improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the drainage component structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the thermal insulation component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the supporting component structure of this utility model.

[0021] In the diagram: 1. Sprue; 2. Sprue hopper; 3. Drainage assembly; 31. Upper sprue; 32. Drainage sprue; 33. Lower sprue; 34. Connecting column; 4. Horizontal sprue; 5. Inner sprue; 6. Drainage seat; 7. Annular stepped cavity; 8. Insulation assembly; 81. Outer shell; 82. Outer structural lining; 83. Reflective lining; 84. Vacuum chamber; 85. Inner structural lining; 86. Magnesia-carbon brick lining; 9. Supporting component; 91. Inner column; 911. Inner stepped groove; 92. Outer column; 921. Outer stepped groove; 93. Inner heat insulation sheet; 94. Outer heat insulation sheet; 941. Outer insertion column; 95. Positioning cylinder; 951. Sliding hole; 952. Sealing groove; 96. Return spring; 97. Sliding column; 971. Piston plate; 972. Flow hole; 98. Sealing ring. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a runner structure that is easy to quickly form, including a sprue 1, a horizontal runner 4 and two sets of ingates 5. The horizontal runner 4 is located at the lower end of the outer side of the sprue 1, and the two sets of ingates 5 are located at both ends of the outer side of the horizontal runner 4. A runner hopper 2 is provided at the upper end of the sprue 1, a flow guide seat 6 is provided at the bottom of the inner cavity of the sprue 1, a flow guide component 3 is provided at the top of the inner cavity of the sprue 1, and heat insulation components 8 are provided on the outer side of both the sprue 1 and the horizontal runner 4. Multiple sets of support members 9 are provided inside the heat insulation components 8, and the multiple sets of support members 9 are arranged at equal angles.

[0024] The supporting component 9 includes an inner column 91, an outer column 92, an inner heat insulation sheet 93, an outer heat insulation sheet 94, and a damping component. One side of the inner heat insulation sheet 93 has an integrally formed inner insert post. One side of the inner column 91 has an inner stepped groove 911 for installing the inner insert post. One side of the outer heat insulation sheet 94 has an integrally formed outer insert post 941. One side of the outer column 92 has an outer stepped groove 921 for installing the outer insert post 941. The damping component is located on the opposite side of the inner heat insulation sheet 93 and the outer heat insulation sheet 94. The inner heat insulation sheet 93, the inner insert post, the outer heat insulation sheet 94, and the outer insert post 941 are all ceramic fiber boards. Ceramic fiber boards have excellent thermal insulation performance and high structural strength, which can meet the structural requirements of the heat insulation support column and will not form a "thermal bridge" between the outer structural lining 82 and the inner structural lining 85.

[0025] The damping component includes a positioning cylinder 95 and a sliding column 97 fixedly connected to the opposite side of the inner heat insulation sheet 93 and the outer heat insulation sheet 94. A sliding hole 951 is provided on one side of the positioning cylinder 95 for the sliding column 97 to slide. A piston plate 971 is connected to one end of the sliding column 97 and is slidably disposed on the inner wall of the positioning cylinder 95. A return spring 96 is provided in the inner cavity of the positioning cylinder 95 to abut against the piston plate 971.

[0026] When the flow channel is affected by external forces such as vibration and thermal expansion and contraction, causing the flow channel structure to tend to shift, the sliding column 97 is forced to slide in the sliding hole 951 of the positioning cylinder 95, which drives the piston plate 971 connected to it to move synchronously. The piston plate 971 squeezes the buffer solution in the positioning cylinder 95. Since the buffer solution is filled in the closed cavity of the positioning cylinder 95, its flow path is restricted and it can only flow slowly through the flow holes 972 set at equal angles on the outside of the piston plate 971. During this process, the viscosity of the buffer solution generates resistance and consumes the energy transferred from the external force.

[0027] At the same time, the return spring 96 is compressed, providing a timely reverse elastic force, which works together with the resistance of the buffer solution to prevent further displacement of the structure, absorb and dissipate the energy generated by the external force, thereby effectively maintaining the integrity of the flow channel structure, ensuring a stable melt flow environment, and ensuring that the molding process is not disturbed.

[0028] The inner cavity of the positioning cylinder 95 is filled with buffer solution. Multiple sets of flow holes 972 are opened on the outer side of the piston plate 971, and the multiple sets of flow holes 972 are set at equal angles. The flow holes 972 facilitate the flow of buffer solution in the positioning cylinder 95 when the piston plate 971 compresses the return spring 96, thereby accelerating the return of the return spring 96, realizing the damping effect, and improving the stability of the flow channel structure.

[0029] A sealing groove 952 is provided on the inner wall of the sliding hole 951. A sealing ring 98 is embedded in the sealing groove 952. The sealing ring 98 is sleeved on the outside of the sliding column 97. The sealing ring 98 improves the sealing between the sliding column 97 and the positioning cylinder 95.

[0030] The thermal insulation component 8 includes an inner structural lining 85, a magnesia-carbon brick inner lining 86, and an outer structural lining 82. The magnesia-carbon brick inner lining 86 is disposed on the inner wall of the sprue 1 and the runner 4, and the inner structural lining 85 is disposed on the outer side of the sprue 1 and the runner 4. The inner column 91 is fixedly connected to the outer side of the inner structural lining 85, and the outer column 92 is fixedly connected to the inner wall of the outer structural lining 82. A vacuum chamber 84 is formed between the outer structural lining 82 and the inner structural lining 85. The cooperation of the vacuum chamber 84 and the reflective lining 83 can effectively prevent a large amount of heat from being transferred to the outer structural lining 82 and the outer shell 81, thereby keeping the heat near the molten metal and preventing the molten metal from crystallizing and solidifying in the runner due to temperature drop.

[0031] The inner wall of the outer structural liner 82 is provided with a reflective liner 83, and the outer wall of the outer structural liner 82 is provided with an outer shell 81. The outer shell 81, the outer structural liner 82, the reflective liner 83 and the inner structural liner 85 are all cylindrical. The reflective liner 83 is a mirror aluminum plate. The heat radiation is transmitted in the form of electromagnetic waves. The reflective liner 83 can reflect part of the electromagnetic waves, thereby reducing the heat loss of the inner structural liner 85 in the form of heat radiation.

[0032] The flow guide assembly 3 includes an integrally formed upper gating 31, a flow guide 32, and a lower gating 33 from top to bottom. Multiple sets of connecting pillars 34 are fixedly connected to the outer side of the upper gating 31. The multiple sets of connecting pillars 34 are fixedly connected to the inner wall of the sprue 1. An annular stepped cavity 7 is provided between the upper gating 31 and the sprue 1. The melt enters the lower gating 33 after passing through the flow guide 32, thereby reducing the flow cross section and increasing the flow effect of the melt. At the same time, it cooperates with the melt flow in the annular stepped cavity 7 to accelerate the flow efficiency of the melt.

[0033] In use, the sprue hopper 2 receives the high-temperature melt. The melt first enters the sprue 1. The flow guide 6 at the bottom of the sprue 1 guides the melt to flow towards the gating 4. At the same time, the flow guide 3 at the top allows the melt to enter the sprue 1 in two ways, with different flow velocities inside and outside. This allows the melt to flow quickly and efficiently towards the gating 4 along a predetermined and smooth path. The melt entering the gating 4 is evenly distributed to the ingates 5 at both ends under its reasonable layout design, and then accurately fills each part of the cavity.

[0034] Secondly, throughout the entire melt flow process, the heat insulation component 8 prevents heat loss, thereby maintaining a suitable melt temperature. Furthermore, when the flow channel encounters external impact or is subjected to stress due to temperature changes, the structural design of the inner and outer insert posts 941 improves the stability of the connection between the inner insert post and the inner post 91, thus ensuring the stability of the connection between the inner heat insulation sheet 93 and the inner post 91. Similarly, the outer post 92 and the outer insert post 941 have high stability. Moreover, the positioning cylinder 95, sliding column 97, piston plate 971, return spring 96, and buffer solution in the damping components work together to buffer and reduce shock, ensuring the stability of the flow channel structure and ensuring that the melt can always flow in a stable flow channel environment in a uniform and stable state, achieving rapid molding.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A runner structure for rapid prototyping, comprising a sprue (1), a grate (4), and two sets of ingates (5), characterized in that: The horizontal gating channel (4) is located at the lower end of the outside of the straight gating channel (1), and the two sets of inner gating channels (5) are located at both ends of the outside of the horizontal gating channel (4). The upper end of the straight gating channel (1) is provided with a gating hopper (2), the bottom of the inner cavity of the straight gating channel (1) is provided with a flow guide seat (6), the top of the inner cavity of the straight gating channel (1) is provided with a flow guide assembly (3), and the outside of both the straight gating channel (1) and the horizontal gating channel (4) is provided with a heat insulation assembly (8). The heat insulation assembly (8) is provided with multiple sets of support members (9), and the multiple sets of support members (9) are arranged at equal angles. The supporting member (9) includes an inner column (91), an outer column (92), an inner heat insulation sheet (93), an outer heat insulation sheet (94), and a damping member. An inner insert post is integrally formed on one side of the inner heat insulation sheet (93). An inner stepped groove (911) for installing the inner insert post is opened on one side of the inner column (91). An outer insert post (941) is integrally formed on one side of the outer heat insulation sheet (94). An outer stepped groove (921) for installing the outer insert post (941) is opened on one side of the outer column (92). The damping member is located on the opposite side of the inner heat insulation sheet (93) and the outer heat insulation sheet (94).

2. The flow channel structure for rapid prototyping according to claim 1, characterized in that: The damping component includes a positioning cylinder (95) and a sliding column (97) fixedly connected to opposite sides of the inner heat insulation sheet (93) and the outer heat insulation sheet (94). A sliding hole (951) is provided on one side of the positioning cylinder (95) for the sliding column (97) to slide. A piston plate (971) is connected to one end of the sliding column (97) and is slidably disposed on the inner wall of the positioning cylinder (95). A return spring (96) is provided in the inner cavity of the positioning cylinder (95) to abut against the piston plate (971).

3. The flow channel structure for rapid prototyping according to claim 2, characterized in that: The inner cavity of the positioning cylinder (95) is filled with buffer solution, and multiple sets of flow holes (972) are opened on the outer side of the piston plate (971), and the multiple sets of flow holes (972) are arranged at equal angles.

4. The flow channel structure for rapid prototyping according to claim 3, characterized in that: The inner wall of the sliding hole (951) is provided with a sealing groove (952), and a sealing ring (98) is embedded in the sealing groove (952). The sealing ring (98) is sleeved on the outside of the sliding column (97).

5. The flow channel structure for rapid prototyping according to claim 4, characterized in that: The thermal insulation component (8) includes an inner structural lining (85), a magnesia-carbon brick inner lining (86), and an outer structural lining (82). The magnesia-carbon brick inner lining (86) is disposed on the inner wall of the sprue (1) and the gutter (4). The inner structural lining (85) is disposed on the outer side of the sprue (1) and the gutter (4). The inner column (91) is fixedly connected to the outer side of the inner structural lining (85). The outer column (92) is fixedly connected to the inner wall of the outer structural lining (82). A vacuum chamber (84) is formed between the outer structural lining (82) and the inner structural lining.

6. The flow channel structure for rapid prototyping according to claim 5, characterized in that: The inner wall of the outer structural liner (82) is provided with a reflective liner (83), and the outer wall of the outer structural liner (82) is provided with a shell (81). The shell (81), the outer structural liner (82), the reflective liner (83) and the inner structural liner (85) are all cylindrical.

7. A flow channel structure for rapid prototyping according to claim 6, characterized in that: The flow-guiding assembly (3) includes an integrally formed upper gating (31), a flow-guiding gating (32), and a lower gating (33) from top to bottom. Multiple sets of connecting columns (34) are fixedly connected to the outer side of the upper gating (31). The multiple sets of connecting columns (34) are fixedly connected to the inner wall of the sprue (1). An annular stepped cavity (7) is provided between the upper gating (31) and the sprue (1).

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