A rapid prototyping plastic tank injection mold

Abstract

The utility model relates to a kind of plastic tank injection mould of rapid prototyping, to solve the technical problem of current traditional injection mould cooling system hose easy distortion, cooling water supply pipe and recovery pipe eccentricity lead to flow deviation, water pipe is not fixed unstable and causes circulation anomaly, and then lead to low cooling efficiency, including shell, the shell end upper end is equipped with liquid outlet pipe, and second cannula is equipped in liquid outlet pipe end, the plug pipe lower end is equipped with stop ring, the plug pipe upper end is detachably equipped with cooling water recovery pipe, the cooling water recovery pipe upper end is connected with third hose, and third hose upper end is connected with lower mould;The plug pipe is equipped with sealing column inside, sealing column upper end is equipped with mounting, and cooling water supply pipe is equipped in mounting hole, the utility model has double sealing leak protection, recovery pipe can rotate to avoid hose distortion;Water supply pipe concentricity prevents flow deviation, pipeline is fixed stable, and the effect of high cooling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically a rapid prototyping injection mold for plastic cans. Background Technology

[0002] A plastic can injection mold is a specialized tool used for the mass production of plastic cans. It is typically precision-machined from high-hardness steel and has an internal cavity that perfectly matches the shape of the can. During production, molten plastic is injected into the closed mold cavity, and after cooling and solidification, the mold is opened to eject the formed plastic can.

[0003] Chinese patent discloses a rapid prototyping injection mold for plastic cans (authorization announcement number CN220883241U). The patented technology includes a base, a fixed mold fixedly connected to the upper middle part of the base, a mold core fixedly connected inside the fixed mold, an annular cavity and a through hole opened inside the mold core, and the annular cavity and the through hole are connected, a heat-conducting block fixedly connected inside the mold core, and the heat-conducting block extends to the inner side of the annular cavity, a linkage plate fixedly and slidably connected inside the base, and a top pin fixedly connected to the middle part of the linkage plate.

[0004] However, existing technologies have the following problems when used:

[0005] Firstly, the hoses of traditional injection mold cooling systems lack flexible adjustment structures. During use, they are prone to twisting and bending due to mold position adjustments or limited pipeline layout, which hinders the flow of cooling water and accelerates hose aging and damage, affecting the stability of the cooling cycle.

[0006] Secondly, the water supply and return pipes of traditional cooling systems lack precise positioning structures, which can easily lead to misalignment due to processing errors, causing water flow deviation. Furthermore, the water pipe fixing method is unstable and prone to loosening, resulting in abnormal circulation and significantly reducing cooling efficiency. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a rapid prototyping plastic can injection mold to solve the technical problems of easy twisting of hoses, misalignment of cooling water supply pipes and recovery pipes causing flow direction deviation, and unstable water pipe fixing causing abnormal circulation, which in turn leads to low cooling efficiency in the current traditional injection mold cooling system.

[0008] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a rapid prototyping plastic can injection mold is designed, including a shell, an outlet pipe is installed at the upper end of the shell, and a second insert pipe is installed at the end of the outlet pipe; an inlet pipe is installed at the lower end of the shell, and a first insert pipe is installed at the end of the inlet pipe; a plug tube is detachably installed inside the shell, the end of the first insert pipe is inserted into the plug tube, and the end of the second insert pipe is inserted into the plug tube; a stop ring is installed at the lower end of the plug tube; a cooling water recovery pipe is detachably installed at the upper end of the plug tube; a third hose is connected to the upper end of the cooling water recovery pipe, and a lower mold is connected to the upper end of the third hose.

[0009] A sealing post is installed inside the plug tube. An installation hole is opened at the upper end of the sealing post, and a cooling water supply pipe is installed in the installation hole.

[0010] In this design, the plug tube is detachably installed through the housing's through-hole. The lower end stop ring fits against the lower end of the housing, and the outer wall sealing ring fits against the inner wall of the through-hole, forming a double seal to prevent cooling water leakage. The cooling water recovery pipe is detachably connected to the plug tube and flexibly connected to the lower mold via a third flexible hose. This allows for horizontal rotation to adjust the angle, solving the problem of traditional cooling pipe hoses being prone to twisting and bending, and ensuring circulation stability.

[0011] External cooling water is introduced into the pipe hole of the plug tube through the first hose, the inlet pipe, and the first insert pipe. The sealing post blocks the water flow, forcing the cooling water to be transported in a direction through the cooling water supply pipe and enters the cooling channel of the lower mold through the third hose. The used cooling water flows back through the cooling water recovery pipe and is discharged and collected through the second insert pipe, the outlet pipe, and the second hose.

[0012] The concentric arrangement of the cooling water supply and return pipes solves the problem of flow direction deviation caused by traditional processing errors, ensuring that cooling water evenly covers the mold cooling channels and avoiding localized insufficient or excessive cooling. Simultaneously, the secure assembly of the connector pipe with each component solves the defect of unstable cooling water pipe fixation, effectively preventing mold and product cooling failures during abnormal circulation, significantly improving the molding accuracy of plastic cans, reducing defects such as deformation and shrinkage marks, and achieving rapid and efficient molding.

[0013] Preferably, the end of the outlet tube away from the second insertion tube is connected to a second flexible tube, and the end of the inlet tube away from the first insertion tube is connected to a first flexible tube.

[0014] In practical applications, the end of the outlet pipe furthest from the second insertion tube is connected to the second flexible tube, and the end of the inlet pipe furthest from the first insertion tube is connected to the first flexible tube. This breaks the limitations of traditional rigid pipe connections on installation space and direction, allowing the inlet pipe to be easily connected to external water supply equipment and the outlet pipe to be flexibly connected to a recycling device, adapting to equipment layout adjustments in different production sites.

[0015] The elastic properties of flexible hoses can absorb vibrations during equipment operation, preventing vibration transmission that could lead to loosening or damage to pipe joints and reducing the risk of cooling water leakage. At the same time, the flexibility of flexible hoses allows for neater pipe layouts, facilitating later maintenance and repair, further improving the operational stability and ease of use of the cooling system, and providing strong support for smooth cooling water circulation.

[0016] Preferably, the upper end of the housing has a through hole, the bottom end of the plug tube passes through the through hole, and sealing rings are installed at the upper and lower ends of the outer wall of the plug tube, with the sealing rings fitting against the inner wall of the through hole.

[0017] In practical applications, a through hole is opened at the upper end of the housing, through which the bottom end of the plug tube passes. The sealing rings installed at the upper and lower ends of the outer wall fit tightly against the inner wall of the through hole, fully covering the mating gap, effectively preventing cooling water from leaking out of the gap, avoiding a decrease in cooling efficiency, waste of water resources, and deterioration of the on-site environment.

[0018] The sealing structure does not affect the horizontal rotation function of the plug tube. The flexible material of the sealing ring can adapt to the rotation, achieving a balance between sealing performance and operational flexibility. In addition, the tight fit between the sealing ring and the through hole guides and positions the plug tube, ensuring that it maintains a stable central position during rotation, avoiding misalignment that could lead to poor tube connection or pipe blockage, and ensuring smooth cooling water circulation.

[0019] Preferably, a first pipe is installed at the lower end of the lower mold, the upper end of the third hose is connected to the lower end of the first pipe, and the lower end of the third hose is connected to a second pipe, the lower end of the second pipe being connected to the upper end of the cooling water recovery pipe.

[0020] In practical applications, the first pipe is installed at the lower end of the lower mold as an extension outlet of the cooling channel, providing a stable connection base for the third hose; the second pipe connects the third hose to the cooling water recovery pipe, further improving the connection reliability and sealing.

[0021] The flexibility of the third hose allows the cooling water recovery pipe to rotate horizontally, preventing the hose from twisting or bending. It also accommodates installation errors between the lower mold and the recovery pipe, ensuring a tight pipe connection. This structure allows cooling water to flow smoothly from the supply pipe, through the second pipe, the third hose, and the first pipe into the mold cooling channel. After cooling, it flows back along the original path, achieving stable and efficient cooling water transfer between the recovery pipe and the mold, ensuring continuous cooling circulation.

[0022] Preferably, the upper end of the outer wall of the plug tube is provided with a second connecting hole, the lower end of the outer wall of the plug tube is provided with a first connecting hole, and the upper end of the plug tube is provided with a tube hole, and the tube hole, the first connecting hole and the second connecting hole are connected.

[0023] In practical applications, the upper end of the outer wall of the plug tube is provided with a second connecting hole, the lower end with a first connecting hole, and the upper end with a pipe hole. The three are interconnected. The first connecting hole connects to the first insert tube and serves as the cooling water inlet channel; the second connecting hole connects to the second insert tube and serves as the cooling water outlet channel; the pipe hole provides installation space for the sealing column and water supply pipe, and at the same time realizes the physical separation of liquid inlet and liquid outlet, avoiding water flow mixing and turbulence.

[0024] Preferably, the end of the second insertion tube extends into the tube hole through the second connecting hole, and the end of the first insertion tube extends into the tube hole through the first connecting hole.

[0025] In practical applications, the end of the second insertion tube extends through the second connecting hole into the tube hole, and the end of the first insertion tube extends through the first connecting hole into the tube hole. This increases the contact area between the insertion tube and the plug tube, improves the sealing performance of the fluid circuit connection, and prevents cooling water from leaking or causing turbulence at the connection point.

[0026] For the inlet side, the first insert, extending deep into the pipe hole, directly delivers cooling water to the vicinity of the sealing column, reducing water flow energy loss and ensuring rapid entry into the supply pipe. For the outlet side, the second insert, extending deep into the pipe hole, efficiently collects returning cooling water, preventing stagnation and improving return efficiency. Furthermore, the insert-type connection simplifies the assembly process, achieving reliable connection without complex seals, facilitating subsequent component disassembly, maintenance, and replacement, and reducing the risk of failure.

[0027] Preferably, the sealing post is installed inside the hole in the plug tube, and the sealing post is located between the first connecting hole and the second connecting hole.

[0028] In practical applications, the sealing post is installed inside the pipe hole of the plug tube, between the first connecting hole and the second connecting hole, dividing the pipe hole into an inlet area and an outlet area. This prevents the cooling water from flowing back directly without passing through the water supply pipe, ensuring that all cooling water is forced to be directionally delivered to the mold cooling channel through the water supply pipe, thereby maximizing the cooling effect.

[0029] The installation position of the sealing column does not affect the normal liquid supply and return of the tubing, achieving orderly separation and coordinated operation of the liquid path. This avoids uneven cooling caused by liquid crossflow, ensuring stable and uniform cooling in all areas of the mold, significantly improving the molding accuracy of plastic cans, reducing defects such as deformation and bubbles, and guaranteeing product quality stability and production efficiency.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] 1. When rapid cooling and molding of plastic can injection molds is required, this utility model improves operational convenience and sealing reliability through precise assembly and flexible rotation design. First, the bottom end of the plug tube is passed through the through hole of the shell. The diameter of the hole matches the outer diameter of the plug tube to ensure smooth insertion. Then, a stop ring is installed at the lower end of the plug tube. Its outer diameter is larger than the through hole, and its upper end fits tightly against the lower end face of the shell, which not only limits movement and prevents slippage but also forms a preliminary mechanical seal. At the same time, the sealing ring on the outer wall of the plug tube fits tightly against the inner wall of the through hole. Through elastic deformation, the gap is filled to achieve a double seal, effectively preventing cooling water leakage. The cooling water recovery pipe is detachably connected to the upper end of the plug tube and can rotate horizontally around the axis of the plug tube. When the direction of the third hose needs to be changed due to mold adjustment or pipeline layout, rotating the cooling water recovery pipe can drive the hose to adjust its angle synchronously. This completely avoids the twisting and blockage problems caused by the fixed angle limitation of the hose in the traditional cooling system, reduces water flow resistance, significantly improves the stability of the cooling cycle, and lays the foundation for efficient cooling.

[0032] 2. In this invention, external cooling water is introduced into the inlet pipe via a flexible first hose. The first hose can adapt to different installation environments and reduce the impact of equipment vibration. The first insert at the end of the inlet pipe is precisely inserted into the pipe hole of the plug pipe to ensure that the cooling water flows in a directional manner. The cooling water entering the pipe hole is blocked by the sealing post, which fits tightly against the inner wall of the pipe hole, forcing the cooling water to enter the cooling water supply pipe only through its central channel, avoiding water flow dispersion and ensuring cooling efficiency. Subsequently, the cooling water is introduced into the cooling channel of the lower mold through the cooling water supply pipe and the third hose, evenly covering the key molding area and quickly removing heat. The cooled water returns through the cooling water recovery pipe, is introduced into the outlet pipe through the second insert, and is finally collected by the second hose, forming a closed loop circulation. This solves the problem of the cooling water supply pipe and the cooling water recovery pipe being concentrically set, avoiding flow direction deviation caused by processing errors, ensuring uniform water flow, and improving cooling efficiency. The plug pipe, stop ring, and other components ensure stable pipe fixation, solving the circulation abnormality problem caused by loose water pipes in traditional systems, significantly improving the molding accuracy of plastic cans, and reducing the incidence of defects such as deformation and bubbles. Attached Figure Description

[0033] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0034] Figure 2 This is a three-dimensional schematic diagram of the lower mold of this utility model;

[0035] Figure 3 This is a cross-sectional view showing the connection between the plug tube, cooling water recovery tube, and cooling water supply tube of this utility model.

[0036] Figure 4 This is a cross-sectional view of the shell of this utility model;

[0037] Figure 5This is a cross-sectional view of the cooling water recovery pipe of this utility model;

[0038] Figure 6 This is a cross-sectional view of the plug tube of this utility model;

[0039] Figure 7 This is a three-dimensional schematic diagram of the cooling water recovery pipe of this utility model.

[0040] In the picture:

[0041] 100. Liquid inlet pipe;

[0042] 110. First flexible tube; 120. Housing; 121. Through hole;

[0043] 130. Second flexible tube; 140. Discharge tube; 150. Connector tube;

[0044] 151. First connecting hole; 152. Second connecting hole; 153. Pipe hole;

[0045] 160. Cooling water recovery pipe; 170. First insertion pipe;

[0046] 180. Second cannula; 190. Sealing ring; 191. Stop ring;

[0047] 200. Cooling water supply pipe;

[0048] 210. Sealing column;

[0049] 300. Lower mold;

[0050] 310, First pipe; 320, Third hose; 330, Second pipe. Detailed Implementation

[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0052] Example 1: A rapid prototyping injection mold for plastic cans, see [link / reference] Figures 1 to 7The device includes a housing 120, with an outlet pipe 140 installed at the upper end of the housing 120 and a second insertion pipe 180 installed at the end of the outlet pipe 140. An inlet pipe 100 is installed at the lower end of the housing 120, with a first insertion pipe 170 installed at the end of the inlet pipe 100. A plug pipe 150 is detachably installed inside the housing 120, with the ends of the first insertion pipe 170 and the second insertion pipe 180 inserted into the plug pipe 150. A stop ring 191 is installed at the lower end of the plug pipe 150. A cooling water recovery pipe 160 is detachably installed at the upper end of the plug pipe 150, with a third flexible hose 320 connected to the upper end of the cooling water recovery pipe 160. The upper end of the third flexible hose 320 is connected to a lower mold. 300; The end of the liquid outlet pipe 140 away from the second insertion tube 180 is connected to the second flexible tube 130, and the end of the liquid inlet pipe 100 away from the first insertion tube 170 is connected to the first flexible tube 110; A through hole 121 is opened at the upper end of the housing 120, and the bottom end of the plug tube 150 passes through the through hole 121. Sealing rings 190 are respectively installed at the upper and lower ends of the outer wall of the plug tube 150, and the sealing rings 190 fit against the inner wall of the through hole 121; A first pipe 310 is installed at the lower end of the lower mold 300, the upper end of the third flexible tube 320 is connected to the lower end of the first pipe 310, and the lower end of the third flexible tube 320 is connected to the second pipe 330. The lower end of the second pipe 330 is connected to the upper end of the cooling water recovery pipe 160;

[0053] When rapid cooling molding of a plastic can injection mold is required, firstly, the bottom end of the plug tube 150 is passed through a pre-drilled through hole 121 in the housing 120. The diameter of the through hole 121 matches the outer diameter of the plug tube 150, ensuring smooth insertion without excessive gaps. Then, a stop ring 191 is installed at the lower end of the plug tube 150. The outer diameter of the stop ring 191 is larger than the diameter of the through hole 121, and its upper end fits tightly against the lower end face of the housing 120. This not only limits the plug tube 150 from moving upwards during operation but also forms a preliminary mechanical seal with the housing 120. Simultaneously, a sealing ring 190 fitted onto the outer wall of the plug tube 150 fits tightly against the inner wall of the through hole 121. The sealing ring 190, made of elastic material, fills the tiny gap between the plug tube 150 and the through hole 121 through its own compression deformation, achieving a double sealing effect. This effectively prevents cooling water leakage at the assembly gaps and ensures the sealing performance of the cooling system.

[0054] The cooling water recovery pipe 160 and the upper end of the plug pipe 150 adopt a detachable connection structure, allowing the cooling water recovery pipe 160 to rotate horizontally around the axis of the plug pipe 150. When the third hose 320 needs to change its direction due to mold position adjustment or pipeline layout, the operator can directly rotate the cooling water recovery pipe 160 to synchronously adjust the angle of the third hose 320, thereby completely avoiding pipeline blockage and water flow obstruction caused by forced bending or twisting of the third hose 320. In traditional cooling systems, hoses often become twisted and deformed due to fixed angle limitations, which not only affects the cooling water circulation efficiency but also accelerates hose aging and damage, increasing maintenance costs. By flexibly adjusting the angle, the third hose 320 is ensured to always maintain a smooth flow state, reducing water flow resistance and thus improving the stability of the entire cooling cycle, facilitating efficient cooling.

[0055] For details, see Figures 1 to 7 A sealing post 210 is installed inside the plug tube 150. The upper end of the sealing post 210 has an installation hole, and a cooling water supply pipe 200 is installed in the installation hole. A second connecting hole 152 is opened at the upper end of the outer wall of the plug tube 150, a first connecting hole 151 is opened at the lower end of the outer wall of the plug tube 150, and a pipe hole 153 is opened at the upper end of the plug tube 150. The pipe hole 153, the first connecting hole 151, and the second connecting hole 152 are connected. The end of the second insertion tube 180 passes through the second connecting hole 152 and extends into the pipe hole 153. The end of the first insertion tube 170 passes through the first connecting hole 151 and extends into the pipe hole 153. The sealing post 210 is installed in the pipe hole 153 of the plug tube 150, and the sealing post 210 is located between the first connecting hole 151 and the second connecting hole 152.

[0056] External cooling water is introduced into the inlet pipe 100 through a first flexible hose 110. The flexible design of the first hose 110 allows it to adapt to different installation environments, facilitates connection with external water supply equipment, and reduces the impact of equipment vibration on the pipe connection. The inlet pipe 100, as a rigid pipe, provides a stable delivery channel for cooling water. Its end, the first insert 170, is precisely inserted into the pipe hole 153 of the plug pipe 150, ensuring that the cooling water flows directionally into the pipe hole 153.

[0057] When cooling water enters the pipe hole 153, it is blocked by the sealing post 210. The sealing post 210 is fixedly installed inside the pipe hole 153, and its outer diameter fits tightly against the inner wall of the pipe hole 153, forcing the cooling water to enter the cooling water supply pipe 200 through the pre-set channel in the center of the sealing post 210, preventing the cooling water from spreading freely. This directional flow ensures that the entire flow of cooling water can be delivered through the cooling water supply pipe 200, avoiding the reduction in cooling efficiency caused by water flow dispersion. Subsequently, the cooling water flows from the cooling water supply pipe 200 into the third hose 320, and from the third hose 320 into the cooling channels of the lower mold 300. The cooling channels are distributed according to the structural characteristics of the mold, ensuring that the cooling water can evenly cover the key molding areas of the mold and quickly remove the heat from the mold and the molten plastic.

[0058] After completing the cooling task, the cooling water carrying heat flows back through the cooling water recovery pipe 160. The upper end of the cooling water recovery pipe 160 is connected to the cooling channel outlet of the lower mold 300, and the lower end is inserted into the pipe hole 153 of the plug pipe 150 through the second insertion pipe 180 to guide the returned cooling water into the liquid outlet pipe 140. Finally, it is collected and recovered by the second hose 130 to form a closed loop.

[0059] By concentrically aligning the cooling water supply pipe 200 and the cooling water return pipe 160, the supply and return channels are aligned, resolving the flow direction deviation problem caused by traditional machining errors. In traditional molds, the supply and return pipes often become eccentric due to insufficient machining precision, causing the cooling water to flow to one side, resulting in localized over- or under-cooling of the mold and affecting product molding quality. Concentricity ensures uniform water flow distribution, improves cooling efficiency, and makes the temperature of all parts of the mold more uniform. The coordinated fixing of components such as the plug pipe 150, stop ring 191, and sealing post 210 solves the problem of unstable cooling water pipe fixing. Traditional cooling water pipes often experience water flow fluctuations or even pipe detachment due to loose fixing structures, leading to abnormal circulation, ineffective cooling of the mold and product, insufficient product molding precision, and increased defect rate. The reliable fixing structure ensures the stability of the pipe connection, avoids abnormal circulation, significantly improves the molding precision of plastic can products, and reduces the incidence of defects such as deformation, shrinkage marks, and bubbles, providing a strong guarantee for efficient production of high-quality plastic cans.

[0060] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0061] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A rapid prototyping injection mold for a plastic can, comprising a shell (120), characterized in that, The upper end of the housing (120) is equipped with an outlet pipe (140) and a second insertion pipe (180) is installed at the end of the outlet pipe (140). The lower end of the housing (120) is equipped with an inlet pipe (100) and a first insertion pipe (170) is installed at the end of the inlet pipe (100). A plug pipe (150) is detachably installed inside the housing (120). The end of the first insertion pipe (170) is inserted into the plug pipe (150), and the end of the second insertion pipe (180) is inserted into the plug pipe (150). A stop ring (191) is installed at the lower end of the plug pipe (150). A cooling water recovery pipe (160) is detachably installed at the upper end of the plug pipe (150). A third hose (320) is connected to the upper end of the cooling water recovery pipe (160), and a lower mold (300) is connected to the upper end of the third hose (320). A sealing post (210) is installed inside the plug tube (150). The upper end of the sealing post (210) is provided with an installation hole, and a cooling water supply pipe (200) is installed in the installation hole.

2. The rapid prototyping injection mold for plastic cans as described in claim 1, characterized in that, The end of the outlet tube (140) away from the second insertion tube (180) is connected to a second flexible tube (130), and the end of the inlet tube (100) away from the first insertion tube (170) is connected to a first flexible tube (110).

3. The rapid prototyping injection mold for plastic cans as described in claim 1, characterized in that, The upper end of the housing (120) is provided with a through hole (121), the bottom end of the plug tube (150) passes through the through hole (121), and sealing rings (190) are respectively installed at the upper and lower ends of the outer wall of the plug tube (150), and the sealing rings (190) fit against the inner wall of the through hole (121).

4. The rapid prototyping injection mold for plastic cans as described in claim 1, characterized in that, The lower mold (300) is equipped with a first pipe (310) at its lower end. The upper end of the third hose (320) is connected to the lower end of the first pipe (310), and the lower end of the third hose (320) is connected to a second pipe (330). The lower end of the second pipe (330) is connected to the upper end of the cooling water recovery pipe (160).

5. The rapid prototyping injection mold for plastic cans as described in claim 1, characterized in that, The upper end of the outer wall of the plug tube (150) is provided with a second connecting hole (152), the lower end of the outer wall of the plug tube (150) is provided with a first connecting hole (151), the upper end of the plug tube (150) is provided with a tube hole (153), and the tube hole (153), the first connecting hole (151) and the second connecting hole (152) are connected.

6. The rapid prototyping injection mold for plastic cans as described in claim 5, characterized in that, The end of the second insertion tube (180) extends through the second connecting hole (152) into the tube hole (153), and the end of the first insertion tube (170) extends through the first connecting hole (151) into the tube hole (153).

7. The rapid prototyping injection mold for plastic cans as described in claim 1, characterized in that, The sealing post (210) is installed in the pipe hole (153) of the plug tube (150), and the sealing post (210) is located between the first connecting hole (151) and the second connecting hole (152).

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