Quick forming device and method for preventing material stagnation of hot runner of injection molding multi-cavity pen holder
By designing a rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material, and adopting a sealing component and cooling chamber structure, the problem of hot runner blockage is solved, achieving efficient molding and automatic unloading, thereby improving product quality and production efficiency.
Patent Information
- Application Number
- CN202610223860.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-25
- Publication Date
- 2026-03-27
AI Technical Summary
Existing pen barrel rapid prototyping molds lack a sealing function inside the hot runner, causing molten plastic to flow into the cavity and affecting the molding quality.
Design a rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material. It adopts a sealing component and cooling chamber structure. The core is driven to move by a hydraulic telescopic rod to achieve sealing and demolding. The material is unloaded by the coordinated movement of the push plate and connecting rod.
It effectively prevents residual molten plastic from flowing into the molding cavity in the hot runner, improves product qualification rate, shortens production cycle, enhances cooling efficiency, reduces manual intervention, and lowers labor intensity.
Smart Images
Figure CN121733760A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of pen barrel injection molding, and particularly to a hot runner anti-material-stagnation rapid forming device and method for injection molding of multi-cavity pen barrels. BACKGROUND
[0002] A pen is a commonly used writing tool. With the increasing workload and study tasks, people have a greater demand for pens. In modern production technology, a pen barrel rapid forming mold is needed for the production of pen barrels. Material enters a flow channel plate through a feeding port, is then injected into a cavity, and forms the shape of a pen barrel. After cooling, the pen barrel is cooled and shaped, and then is taken out from the inside of the cavity.
[0003] In use of the existing pen barrel rapid forming mold, due to the lack of plugging function in the hot runner, after the pen barrel is taken out from the inside of the cavity, the molten plastic in the hot runner continues to flow into the cavity, resulting in residual material in the cavity and affecting the quality of the next forming. Therefore, a hot runner anti-material-stagnation rapid forming device for injection molding of multi-cavity pen barrels needs to be designed. SUMMARY
[0004] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a hot runner anti-material-stagnation rapid forming device and method for injection molding of multi-cavity pen barrels.
[0005] The technical solution adopted by the present application is as follows: a hot runner anti-material-stagnation rapid forming device for injection molding of multi-cavity pen barrels, comprising support seats, the support seats are provided in two, a guide rod is fixedly connected between the two support seats, a fixed mold assembly is fixedly connected to the left end of the guide rod, the fixed mold assembly comprises a first mounting seat, a second mounting seat and an injection port, the first mounting seat and the second mounting seat are both fixed to the left end of the guide rod, the first mounting seat is fixedly connected to the second mounting seat through bolts, an injection port is formed in the left end of the first mounting seat, an injection cavity and a plurality of hot runners are arranged in the first mounting seat, the injection cavity is in communication with the injection port and the hot runners, a sealing assembly is arranged in the hot runner, and the sealing assembly is used for sealing the inside of the hot runner; a plurality of forming cavities are arranged in the second mounting seat, the forming cavities and the hot runners are in one-to-one correspondence and communication; a movable mold assembly is slidably arranged at the right end of the guide rod, the movable mold assembly comprises a third mounting seat and a moving plate, a discharging assembly is arranged in the third mounting seat, the third mounting seat is connected to the moving plate through the discharging assembly, a plurality of cores are fixedly connected in the third mounting seat, the cores penetrate through the moving plate and are slidably connected with the moving plate, and the cores are in one-to-one correspondence with the forming cavities.
[0006] Further description of the above technical solution is as follows: A circular hole is formed in the left end face of the support seat at the left end, and the circular hole corresponds to the injection port.
[0007] As a further description of the above technical solution: The hydraulic telescopic rod is fixedly connected to the right end of the supporting seat, the extending end of the hydraulic telescopic rod penetrates the supporting seat, and the extending end of the hydraulic telescopic rod is fixedly connected to the third mounting seat.
[0008] As a further description of the above technical solution: The discharging assembly comprises a push plate, a connecting rod and a first spring, the connecting rod is slidably connected to the third mounting seat, one end of the connecting rod is fixedly connected to the moving plate, the other end of the connecting rod is fixedly connected to the push plate, the first spring is arranged on the connecting rod, one end of the first spring is fixedly connected to the push plate, and the other end of the first spring is fixedly connected to the third mounting seat.
[0009] As a further description of the above technical solution: The sealing assembly comprises a fixed cylinder, a second spring, a moving rod, a sealing block, a sealing seat and a push rod, the fixed cylinder is fixedly connected to the inside of the injection cavity, the second spring is fixedly connected to the inside of the fixed cylinder, the moving rod is slidably connected to the inside of the fixed cylinder, the moving rod is fixedly connected to the second spring, and the sealing block is fixedly connected to the end, away from the second spring, of the moving rod; the sealing seat is fixedly connected to the inside of the hot runner, the sealing seat cooperates with the sealing block, and the push rod is fixedly connected to the end, away from the third mounting seat, of the core, and the push rod cooperates with the sealing block.
[0010] As a further description of the above technical solution: The sealing block is in a spherical shape, and the diameter of the push rod is smaller than the inner diameter of the sealing seat.
[0011] As a further description of the above technical solution: The third mounting seat is internally provided with a cooling cavity, the third mounting seat is fixedly connected with a water inlet and a water outlet at the lower end, and the water inlet and the water outlet are in communication with the cooling cavity; the core is internally provided with a cooling flow channel, and the cooling flow channel is in communication with the cooling cavity.
[0012] As a further description of the above technical solution: The first mounting seat is fixedly connected with a plurality of heating rings, the heating rings are in one-to-one correspondence with the hot runners, the heating rings are located at the ends of the hot runners, the inner walls of the hot runners are coated with an anti-sticking coating, and the anti-sticking coating is a polytetrafluoroethylene coating.
[0013] As a further description of the above technical solution: The right end surface of the second mounting seat is provided with a groove, and the groove is in one-to-one correspondence with the forming cavities; the left end of the moving plate is fixedly connected with a convex ring, the convex ring cooperates with the groove, the core penetrates the convex ring, and the core is slidably connected with the convex ring.
[0014] The injection molding multi-cavity pen barrel hot runner anti-material stagnation rapid forming method is realized based on the injection molding multi-cavity pen barrel hot runner anti-material stagnation rapid forming device, and comprises the following steps: S1: the molten plastic is injected into the injection cavity of the first mounting seat through the injection port of the injection molding machine, then enters the forming cavity through the hot runner, and is formed under the cooperation of the core; S2: after the injection is completed, pressure maintaining and cooling are performed to rapidly cool and form the material body; S3: after the pressure maintaining and cooling are completed, the hydraulic telescopic rod is started to perform the contraction operation, so that the third mounting seat drives the moving plate and the core to move rightward, thereby realizing the demolding operation; S4: with the contraction of the hydraulic telescopic rod, when the push plate contacts the supporting seat, the push plate is extruded to move leftward, thereby driving the moving plate to move leftward under the cooperation of the connecting rod, the leftward movement of the moving plate pushes the pen barrel on the core to move, so that the pen barrel is separated from the core, and the unloading operation is completed.
[0015] The present application has the following beneficial effects: 1. Compared with the prior art, the sealing assembly is arranged, after the pen barrel is cooled and formed, the demolding operation is performed, so that the core drives the pen barrel to separate from the forming cavity, when the core moves rightward, the push rod on the core no longer extrudes the sealing block, then the moving rod is pushed to reset under the cooperation of the compressed second spring, and drives the sealing block to approach the sealing seat, so that the sealing block is tightly matched with the sealing seat, thereby realizing the plugging of the hot runner. In this way, the molten plastic remaining in the hot runner cannot continue to flow into the forming cavity, effectively avoiding the forming quality problem caused by material stagnation, and improving the qualified rate of products.
[0016] 2. Compared with the prior art, the cooling cavity and the cooling flow channel are arranged, which can significantly improve the cooling efficiency. In the pressure maintaining and cooling stage, the cooling water enters the cooling cavity from the water inlet, and rapidly cools the core and the forming cavity through the cooling flow channel, so that the pen barrel can be shaped in a short time. In this way, the production cycle is shortened, and the production efficiency is further improved.
[0017] 3. Compared with the prior art, the push plate, the connecting rod and the first spring are arranged, in the process of demolding of the pen barrel, the hydraulic telescopic rod performs the contraction operation, which drives the third mounting seat to move rightward, thereby driving the moving plate to move rightward under the cooperation of the first spring, the connecting rod and the push plate, and drives the pen barrel on the core to separate from the forming cavity under the cooperation of the core. With the contraction of the hydraulic telescopic rod, after the push plate contacts the supporting seat, the push plate is extruded to move leftward, thereby driving the connecting rod and the moving plate to move cooperatively, at this time, the moving plate pushes the pen barrel on the core to move, so that the pen barrel is separated from the core, and the unloading operation is completed. In the unloading process, manual intervention is reduced, and the labor intensity is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 Structure diagram of the first perspective of the whole application; Figure 2 Structure diagram of the second perspective of the whole application; Figure 3 Structure diagram of the inside of the application; Figure 4 Structure diagram of the inside of the application Figure 3 Enlarged view of part A in the application; Figure 5 Structure diagram of the first perspective of the mold assembly of the application; Figure 6 Structure diagram of the second perspective of the mold assembly of the application; Figure 7 Structure diagram of the mold assembly and the ejection assembly of the application after cooperation; Figure 8 Structure diagram of the inside of the mold assembly and the ejection assembly of the application after cooperation; Figure 9 Structure diagram of the pen barrel of the application.
[0019] Legend: 1, support seat; 2, mold assembly; 201, first mounting seat; 202, second mounting seat; 203, injection port; 3, mold assembly; 301, third mounting seat; 302, moving plate; 4, hydraulic telescopic rod; 5, ejection assembly; 501, push plate; 502, connecting rod; 503, first spring; 6, circular hole; 7, guide rod; 8, injection cavity; 9, hot runner; 10, forming cavity; 11, core; 12, sealing assembly; 1201, fixed cylinder; 1202, second spring; 1203, moving rod; 1204, sealing block; 1205, sealing seat; 1206, push rod; 13, cooling cavity; 14, cooling runner; 15, water inlet; 16, water outlet; 17, heating ring; 18, groove; 19, convex ring. DETAILED DESCRIPTION
[0020] Reference Figures 1-9The application provides a rapid forming device for preventing material stagnation of a hot runner of a multi-cavity pen holder injection molding, which comprises support seats 1, two support seats 1 are arranged, a guide rod 7 is fixedly connected between the two support seats 1, a fixed mold assembly 2 is fixedly connected to the left end of the guide rod 7, the fixed mold assembly 2 comprises a first mounting seat 201, a second mounting seat 202 and an injection port 203, the first mounting seat 201 and the second mounting seat 202 are both fixed to the left end of the guide rod 7, the first mounting seat 201 is fixedly connected to the second mounting seat 202 through bolts, the left end of the first mounting seat 201 is provided with the injection port 203, an injection cavity 8 and a plurality of hot runners 9 are arranged in the first mounting seat 201, the injection cavity 8 is in communication with the injection port 203 and the hot runners 9 respectively, a sealing assembly 12 is arranged in the hot runner 9 and used for sealing the inside of the hot runner 9, a plurality of forming cavities 10 are arranged in the second mounting seat 202, the plurality of forming cavities 10 are in one-to-one correspondence with and in communication with the hot runners 9, a movable mold assembly 3 is slidably arranged at the right end of the guide rod 7, the movable mold assembly 3 comprises a third mounting seat 301 and a moving plate 302, a discharging assembly 5 is arranged in the third mounting seat 301, the third mounting seat 301 is connected to the moving plate 302 through the discharging assembly 5, a plurality of core molds 11 are fixedly connected to the third mounting seat 301, the core molds 11 penetrate through the moving plate 302 and are slidably connected to the moving plate 302, the core molds 11 are in one-to-one correspondence with the forming cavities 10, a hydraulic telescopic rod 4 is fixedly connected to the support seat 1 at the right end, the extending end of the hydraulic telescopic rod 4 penetrates through the support seat 1, and the extending end of the hydraulic telescopic rod 4 is fixedly connected to the third mounting seat 301.
[0021] In use, first, the nozzle of the injection molding machine is aligned with the injection port 203, the injection molding machine is started, and the molten plastic is injected into the injection cavity 8 of the first mounting base 201 through the injection port 203. Then, the molten plastic flows into the molding cavity 10 through the hot runner 9 under the action of the injection pressure, and the filling process is completed with the cooperation of the core 11. When the injection is completed, the system enters the pressure holding and cooling stage, so that the pen barrel in the molding cavity 10 is rapidly cooled and shaped. After cooling, the hydraulic telescopic rod 4 starts the contraction operation, drives the third mounting base 301 to move to the right, and drives the moving plate 302 to move to the right with the cooperation of the unloading assembly 5. With the right movement of the third mounting base 301, the core 11 also moves to the right, so that the molded pen barrel is separated from the molding cavity 10. During the right movement of the core 11, the sealing assembly 12 performs the sealing operation, effectively blocks the hot runner 9, prevents residual plastic from flowing into the molding cavity 10, and is beneficial to the next injection operation. With the contraction of the hydraulic telescopic rod 4, after the unloading assembly 5 contacts the support base 1, the unloading assembly 5 is extruded, which drives the moving plate 302 to move to the left. The left movement of the moving plate 302 pushes the pen barrel on the core 11 to separate from the core 11, and the automatic unloading operation is completed. After the pen barrel is separated from the core 11, the pen barrel is collected and arranged, and then the cutting equipment is used to cut the excess material at the step of the thin end of the pen barrel, so that the pen barrel is convenient for use in the later stage.
[0022] The support base 1 located at the left end has a circular hole 6 formed on the left end face. The circular hole 6 corresponds to the injection port 203. During work, the nozzle of the injection molding machine is docked with the injection port 203 through the circular hole 6.
[0023] The unloading assembly 5 comprises a push plate 501, a connecting rod 502 and a first spring 503, the connecting rod 502 is slidably connected in the third mounting seat 301, one end of the connecting rod 502 is fixedly connected with the moving plate 302, the other end of the connecting rod 502 is fixedly connected with the push plate 501, the first spring 503 is arranged on the connecting rod 502, one end of the first spring 503 is fixedly connected with the push plate 501, the other end of the first spring 503 is fixedly connected with the third mounting seat 301, in operation, after cooling, the hydraulic telescopic rod 4 starts to contract, drives the third mounting seat 301 to move rightward, then drives the moving plate 302 to move rightward in cooperation with the first spring 503, the connecting rod 502 and the push plate 501, and makes the pen barrel on the core 11 separate from the inside of the forming cavity 10 in cooperation with the core 11, with the contraction of the hydraulic telescopic rod 4, after the push plate 501 contacts the supporting seat 1, the push plate 501 is pressed to move leftward, then drives the connecting rod 502 and the moving plate 302 to move cooperatively, at this time, the moving plate 302 pushes the pen barrel on the core 11 to move, so that the pen barrel separates from the core 11, and the unloading operation is completed, so that the manual intervention is reduced and the labor intensity is reduced during unloading; meanwhile, the leftward movement of the push plate 501 also compresses the first spring 503, and the compressed first spring 503 is beneficial to the resetting of the push plate 501.
[0024] The sealing assembly 12 comprises a fixed cylinder 1201, a second spring 1202, a moving rod 1203, a sealing block 1204, a sealing seat 1205 and a push rod 1206, the fixed cylinder 1201 is fixedly connected in the injection cavity 8, the second spring 1202 is fixedly connected in the fixed cylinder 1201, the moving rod 1203 is slidably connected in the fixed cylinder 1201 and is fixedly connected with the second spring 1202, the sealing block 1204 is fixedly connected at the end of the moving rod 1203 away from the second spring 1202; the sealing seat 1205 is fixedly connected in the hot runner 9 and cooperates with the sealing block 1204; the push rod 1206 is fixedly connected at the end of the core 11 away from the third mounting seat 301 and cooperates with the sealing block 1204, in operation, when the core 11 moves rightward, the push rod 1206 no longer presses the sealing block 1204, then the moving rod 1203 is driven to move rightward in the fixed cylinder 1201 under the action of the compressed second spring 1202, then drives the sealing block 1204 to move close to the sealing seat 1205, so that the sealing block 1204 tightly cooperates with the sealing seat 1205, thereby achieving the plugging of the hot runner 9. In this way, the residual molten plastic in the hot runner 9 cannot continue to flow into the forming cavity 10, effectively avoiding the molding quality problem caused by material stagnation and improving the product qualification rate; meanwhile, the tight cooperation of the sealing block 1204 and the sealing seat 1205 also achieves the purpose of cutting material, so that when the molded pen barrel is taken out from the inside of the forming cavity 10, the pen barrel does not take out too much plastic.
[0025] The sealing block 1204 is spherical in shape; the diameter of the push rod 1206 is smaller than the inner diameter of the sealing seat 1205, and during operation, in the process of close cooperation between the sealing block 1204 and the sealing seat 1205, the spherical shape of the sealing block 1204 can ensure that the sealing block 1204 and the sealing seat 1205 form more uniform and close contact; at the same time, since the diameter of the push rod 1206 is smaller than the inner diameter of the sealing seat 1205, when the sealing block 1204 is away from the sealing seat 1205, it is beneficial for the molten plastic to enter the inside of the forming cavity 10.
[0026] The third mounting seat 301 is internally provided with a cooling cavity 13, and the lower end of the third mounting seat 301 is fixedly connected with a water inlet 15 and a water outlet 16, which are in communication with the cooling cavity 13; the core 11 is internally provided with a cooling flow channel 14, which is in communication with the cooling cavity 13; during operation, after injection molding is completed, the system enters a pressure maintaining and cooling stage. At this time, cooling water flows into the cooling cavity 13 of the third mounting seat 301 from the water inlet 15, and quickly takes away heat through the cooling flow channel 14 inside the core 11, so that the pen barrel in the forming cavity 10 is rapidly cooled and shaped, and the production efficiency is improved.
[0027] The first mounting seat 201 is internally fixedly connected with a plurality of heating rings 17, which correspond one-to-one with the hot runners 9, and the heating rings 17 are located at the ends of the hot runners 9. The inner wall of the hot runner 9 is coated with an anti-sticking coating, which is a polytetrafluoroethylene coating. During operation, the heating ring 17 continuously provides stable temperature for the hot runner 9, ensures that the molten plastic maintains good fluidity, effectively prevents the plastic from being retained inside the hot runner 9, and at the same time, the anti-sticking coating effectively prevents the plastic from being left on the inner wall of the hot runner 9, further achieving the purpose of preventing material retention.
[0028] The right end face of the second mounting seat 202 is provided with a groove 18, and the groove 18 corresponds one-to-one with the forming cavity 10; the left end of the moving plate 302 is fixedly connected with a convex ring 19, which cooperates with the groove 18; the core 11 penetrates through the convex ring 19 and is in sliding connection with the convex ring 19. During operation, by arranging the convex ring 19 and the groove 18, the sealing property of the mold is further enhanced, and the phenomenon of material leakage that may occur during injection molding is avoided.
[0029] The injection molding multi-cavity pen barrel hot runner anti-material retention rapid forming method is realized based on the injection molding multi-cavity pen barrel hot runner anti-material retention rapid forming device described above, and includes the following steps: S1: using an injection molding machine to inject molten plastic into the injection molding cavity 8 inside the first mounting seat 201 through the injection port 203, and then into the forming cavity 10 through the hot runner 9 under the cooperation of the core 11; S2: after injection molding is completed, pressure maintaining and cooling are performed to rapidly cool and shape the material body; S3: After the pressure holding and cooling are completed, the hydraulic telescopic rod 4 is started to perform the contraction operation, so that the third mounting seat 301 drives the moving plate 302 and the core 11 to move rightwards, thereby realizing the demolding operation; S4: With the contraction of the hydraulic telescopic rod 4, when the push plate 501 contacts the supporting seat 1, the push plate 501 is pressed to move leftwards, and then drives the moving plate 302 to move leftwards under the cooperation of the connecting rod 502, the left movement of the moving plate 302 pushes the pen barrel on the core 11 to move, so that the pen barrel is separated from the core 11, and the unloading operation is completed.
[0030] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for the purpose of limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.
Claims
1. A rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material, comprising a support base (1), wherein two support bases (1) are provided, characterized in that: A guide rod (7) is fixedly connected between the two support seats (1). A fixed mold assembly (2) is fixedly connected to the left end of the guide rod (7). The fixed mold assembly (2) includes a first mounting seat (201), a second mounting seat (202), and an injection port (203). The first mounting seat (201) and the second mounting seat (202) are both fixed to the left end of the guide rod (7). The first mounting seat (201) is fixedly connected to the second mounting seat (202) by bolts. An injection port (203) is opened at the left end of the first mounting seat (201). An injection cavity (8) and multiple hot runners (9) are provided inside the first mounting seat (201). The injection cavity (8) is connected to the injection port (203) and the hot runners (9) respectively. A sealing assembly (12) is provided inside the hot runners (9). The component (12) is used to seal the inside of the hot runner (9); the second mounting base (202) is provided with multiple molding cavities (10), and the multiple molding cavities (10) correspond one-to-one with the hot runner (9) and are connected; the guide rod (7) is slidably provided with a moving mold assembly (3) at the right end, the moving mold assembly (3) includes a third mounting base (301) and a moving plate (302), the third mounting base (301) is provided with a discharge assembly (5), the third mounting base (301) is connected to the moving plate (302) through the discharge assembly (5), the third mounting base (301) is fixedly connected with multiple cores (11), the cores (11) penetrate the moving plate (302) and are slidably connected to the moving plate (302), and the cores (11) correspond one-to-one with the molding cavities (10).
2. The injection molding multi-cavity pen barrel hot runner anti-stagnant material rapid prototyping device according to claim 1, characterized in that: The support base (1) located on the left end has a circular hole (6) on its left end face, and the circular hole (6) corresponds to the injection port (203).
3. The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in claim 1, characterized in that: A hydraulic telescopic rod (4) is fixedly connected to the support base (1) located at the right end. The extended end of the hydraulic telescopic rod (4) passes through the support base (1) and is fixedly connected to the third mounting base (301).
4. The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in claim 1, characterized in that: The unloading assembly (5) includes a push plate (501), a connecting rod (502), and a first spring (503). The connecting rod (502) is slidably connected inside the third mounting base (301). One end of the connecting rod (502) is fixedly connected to the moving plate (302), and the other end of the connecting rod (502) is fixedly connected to the push plate (501). The first spring (503) is provided on the connecting rod (502). One end of the first spring (503) is fixedly connected to the push plate (501), and the other end of the first spring (503) is fixedly connected to the third mounting base (301).
5. The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in claim 1, characterized in that: The sealing assembly (12) includes a fixed cylinder (1201), a second spring (1202), a moving rod (1203), a sealing block (1204), a sealing seat (1205), and a push rod (1206). The fixed cylinder (1201) is fixedly connected inside the injection cavity (8). The second spring (1202) is fixedly connected inside the fixed cylinder (1201). The moving rod (1203) is slidably connected inside the fixed cylinder (1201). The moving rod (1203) is connected to... The second springs (1202) are fixedly connected, and a sealing block (1204) is fixedly connected to the end of the moving rod (1203) away from the second springs (1202); a sealing seat (1205) is fixedly connected inside the hot runner (9), and the sealing seat (1205) cooperates with the sealing block (1204); a push rod (1206) is fixedly connected to the end of the core (11) away from the third mounting seat (301), and the push rod (1206) cooperates with the sealing block (1204).
6. The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in claim 5, characterized in that: The sealing block (1204) is spherical; the diameter of the push rod (1206) is smaller than the inner diameter of the sealing seat (1205).
7. The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in claim 1, characterized in that: The third mounting base (301) is provided with a cooling chamber (13). The lower end of the third mounting base (301) is fixedly connected with a water inlet (15) and a water outlet (16). The water inlet (15) and the water outlet (16) are connected to the cooling chamber (13). The core (11) is provided with a cooling channel (14). The cooling channel (14) is connected to the cooling chamber (13).
8. The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in claim 1, characterized in that: A heating ring (17) is fixedly connected inside the first mounting base (201). Multiple heating rings (17) are provided and correspond one-to-one with the hot runner (9). The heating ring (17) is located at the end of the hot runner (9). The inner wall of the hot runner (9) is coated with an anti-stick coating, which is a polytetrafluoroethylene coating.
9. The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in claim 1, characterized in that: The right end face of the second mounting base (202) is provided with a groove (18), and the groove (18) corresponds one-to-one with the molding cavity (10); the left end of the moving plate (302) is fixedly connected with a convex ring (19), the convex ring (19) cooperates with the groove (18), the core (11) passes through the convex ring (19), and is slidably connected with the convex ring (19).
10. A rapid prototyping method for hot runner anti-stagnant material in injection molding of multi-cavity pen barrels, characterized in that: The rapid prototyping device for injection molding multi-cavity pen barrels with hot runner anti-stagnant material as described in any one of claims 1-9 includes the following steps: S1: The molten plastic is injected into the injection cavity (8) of the first mounting base (201) through the injection port (203) using an injection molding machine, and then enters the molding cavity (10) through the hot runner (9), and is carried out with the cooperation of the core (11); S2: After injection molding is completed, pressure holding and cooling are performed to allow the material to cool and solidify rapidly; S3: After the pressure holding and cooling are completed, start the hydraulic telescopic rod (4) to retract, so that the third mounting seat (301) drives the moving plate (302) and the core (11) to move to the right, thereby realizing the demolding operation; S4: As the hydraulic telescopic rod (4) retracts, when the push plate (501) contacts the support seat (1), it will squeeze the push plate (501) to move to the left, and then, with the cooperation of the connecting rod (502), it will drive the moving plate (302) to move to the left. The leftward movement of the moving plate (302) will push the pen on the core (11) to move, so that the pen can be separated from the core (11) and the unloading operation is completed.