A demolding mechanism for medical injection molding tube processing

Abstract

This utility model discloses a demolding mechanism for processing medical injection molded tubes, including: a lower mold base and an upper mold plate. A cylinder is fixedly connected to one side end of the lower mold base, and a side connecting lug is fixedly connected to one side end of the upper mold plate. A tubular mold cavity is opened at one end of the lower mold base, and several sets of through air grooves are opened inside the upper mold plate. A liquid inlet mechanism is provided between the upper and lower parts of the upper mold plate. A suction mechanism is provided between the upper part of the upper mold plate and the outer side of the lower mold base. A cooling mechanism is provided between the back and the interior of the lower mold base. When the air pump is started, a negative pressure is formed through the folded telescopic tube, the main air pipe, the suction tube, the suction nozzle, and the through air grooves to adsorb the top of the injection molded tube. When the mold is opened, the folded telescopic tube flexibly extends and retracts with the upper mold plate to ensure that the negative pressure is unobstructed. When the upper mold plate rises, the negative pressure pulls the product away from the mold core, realizing flexible and stable demolding, preventing tube collapse or tube scratches, and ensuring the smoothness and integrity of the product.

Description

Technical Field

[0001] This utility model relates to the technical field of medical injection molding tube demolding equipment, specifically a demolding mechanism for medical injection molding tube processing. Background Technology

[0002] The demolding mechanism in medical injection molding tubing is the core component responsible for removing the molded medical injection tubing from the mold cavity or core. Its function is to ensure that the product is removed from the mold intact, efficiently, and without contamination, meeting the precision and hygiene requirements of medical products. During operation, after the injection tubing cools and solidifies inside the mold, the power unit drives the ejector element to contact the product and separate it from the mold by applying uniform force. Subsequently, the reset element drives the mechanism back to the initial position, preparing for the next injection molding.

[0003] For example, a medical injection tube injection mold ejector demolding mechanism disclosed in Chinese patent literature (publication number: CN216152957U) improves demolding efficiency by setting up a medical injection tube injection mold ejector demolding mechanism composed of a mold base, a demolding plate, a mounting plate, and an ejector rod. This mechanism shapes the injection tube through the gap between the ejector rod and the first and second injection grooves, and utilizes the principle of thermal expansion and contraction to allow the injection tube to fit onto the ejector rod after molding and cooling. The demolding plate is then used to demold the molded injection tube, thus improving its demolding efficiency.

[0004] However, when using this mechanism, if the wall thickness of the injection tube is thin and the shrinkage after cooling is small, the fitting force with the ejector pin may be insufficient. During the process of the ejector pin moving the product when the mold is opened, the product is easy to fall off the ejector pin and cannot be smoothly taken out of the mold cavity. Manual assistance is required to remove the part, which increases the operating cost. Utility Model Content

[0005] The purpose of this utility model is to provide a demolding mechanism for processing medical injection molded tubes in order to solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a demolding mechanism for processing medical injection molded tubes, comprising: a lower mold base and an upper mold plate, a cylinder fixedly connected to one side end of the lower mold base, a side connecting lug fixedly connected to one side end of the upper mold plate, a tubular mold cavity opened at one end of the lower mold base, a plurality of through air grooves opened inside the upper mold plate, a liquid inlet mechanism provided between the upper and lower sides of the upper mold plate, a suction mechanism provided between the upper side of the upper mold plate and the outer side of the lower mold base, and a cooling mechanism provided between the back side and the interior of the lower mold base.

[0007] As a further embodiment of this utility model: the liquid inlet mechanism includes a tubular mold core and a diversion pipe, the tubular mold core is fixedly connected to the lower end of the upper template, and the diversion pipe is fixedly connected to the inner end of the upper template; the liquid inlet pipe and the liquid outlet cavity are provided, the liquid inlet pipe is connected to the upper end of the tubular mold core, and the liquid outlet cavity is symmetrically opened on both sides of the upper part of the tubular mold core.

[0008] As a further embodiment of this utility model: the suction mechanism includes a suction nozzle, a suction tube, and a main air pipe. The suction nozzle is fixedly connected to the upper template and communicates with the through air groove. The suction tube is fixedly connected to one end of the suction nozzle, and the main air pipe is fixedly connected to the upper end of the upper template. An air pump and a folding telescopic tube are also included. The air pump is located on the outer side of the lower mold base, and the folding telescopic tube is fixedly connected to the air inlet of the air pump.

[0009] As a further embodiment of this utility model: the cooling mechanism includes a coolant tank, a multi-bend cooling pipe, and a liquid pump. The coolant tank is located on the back of the lower mold base, the multi-bend cooling pipe is fixedly connected to the inside of the lower mold base, and the liquid pump is fixedly connected to one end of the front of the coolant tank. The outlet of the multi-bend cooling pipe extends out of the lower mold base and is fixedly connected to the coolant tank, and the inlet of the multi-bend cooling pipe extends out of the lower mold base and is fixedly connected to the outlet of the liquid pump. There are two sets of both the multi-bend cooling pipe and the liquid pump.

[0010] As a further embodiment of this utility model: the movable end of the cylinder is fixedly connected to the side connecting lug, and multiple sets of cylinders and side connecting lugs are provided. Multiple sets of cylinders are symmetrically arranged on both sides of the lower mold base, and multiple sets of side connecting lugs are symmetrically arranged on both sides of the upper mold plate. Multiple sets of tubular mold cavities and liquid inlet mechanisms are provided.

[0011] As a further improvement of this utility model: the top of the diversion pipe is fixedly connected to the bottom of the inlet pipe, and the diversion pipe and the outlet cavity are interconnected.

[0012] As a further improvement of this utility model: multiple sets of the suction nozzle and the suction tube are provided, and the other end of each set of suction tubes is fixedly connected to the main air pipe, and the top of the foldable telescopic tube is fixedly connected to the bottom of the main air pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the upper mold plate is moved by cylinders on both sides of the lower mold base. Because the cylinders and lugs are symmetrically distributed, the upper mold plate is subjected to uniform force and without deviation. After the upper mold plate and lower mold base are fitted together, the tubular mold core is precisely embedded into the mold cavity, forming a closed molding cavity, ensuring mold closing accuracy and reducing product defects. External equipment transports molten plastic through the inlet pipe to the upper mold plate's distribution pipe. The distribution pipe evenly distributes the molten plastic to the outlet cavities on both sides of the mold core. The injection molten plastic flows smoothly from both sides into the gap between the mold cavity and the mold core. Multiple sets of mold cavities, mold cores, and inlet mechanisms are set up to simultaneously mold multiple products, avoiding localized insufficient filling or air bubbles, and ensuring product consistency. Multiple sets of simultaneous production significantly improve efficiency. Improved efficiency: The medium in the coolant tank is driven by a liquid pump and absorbs heat through the winding cooling pipes distributed in the lower mold base. After heat exchange, it flows back to form a circulation. The thermal expansion and contraction allows the product to fit onto the mold core, achieving rapid and uniform cooling, shortening the curing time, and allowing the product to fit naturally, facilitating subsequent demolding. The air pump is started, and negative pressure is formed through the folded telescopic tube, main air pipe, suction tube, suction nozzle, and through air groove, adsorbing the top of the injection tube. When the mold opens, the folded telescopic tube expands and contracts flexibly with the upper mold plate, ensuring smooth negative pressure. When the upper mold plate rises, the negative pressure pulls the product away from the mold core, achieving flexible and stable demolding, preventing tube collapse or tube scratches, and ensuring the smoothness and integrity of the product. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the lower mold base in this utility model; Figure 3 This is a schematic diagram of the upper template in this utility model; Figure 4 This is a schematic diagram of the liquid inlet mechanism in this utility model; Figure 5 This is a schematic diagram of the suction mold mechanism in this utility model; Figure 6 This is a schematic diagram of the cooling mechanism in this utility model.

[0015] In the diagram: 1. Lower mold base; 2. Upper mold plate; 3. Cylinder; 4. Side connecting lug; 5. Tubular mold cavity; 6. Through air groove; 7. Liquid inlet mechanism; 71. Tubular mold core; 72. Diverter pipe; 73. Liquid inlet pipe; 74. Liquid outlet cavity; 8. Suction mechanism; 81. Suction nozzle; 82. Suction pipe; 83. Main air pipe; 84. Air pump; 85. Folding telescopic pipe; 9. Cooling mechanism; 91. Coolant tank; 92. Multi-bend cooling pipe; 93. Liquid pump. 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] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0018] Reference Figures 1 to 6 In this embodiment of the present invention, a demolding mechanism for processing medical injection molded tubes includes: a lower mold base 1 and an upper mold plate 2. The lower mold base 1 serves as a fixed base for the overall mechanism, and the upper mold plate 2 serves as a movable mold component. A cylinder 3 is fixedly connected to one side end of the lower mold base 1 as a power drive component for mold closing and opening.

[0019] One side of the upper template 2 is fixedly connected to a side connecting lug 4, which serves as a connecting medium for connecting the upper template 2 and the movable end of the cylinder 3. One end of the lower mold base 1 is provided with a tubular mold cavity 5, which serves as a forming groove in the lower mold base 1. Several sets of through air grooves 6 are provided inside the upper template 2, which serve as air channels for negative pressure adsorption.

[0020] A liquid inlet mechanism 7 is provided between the top and bottom of the upper mold plate 2. A suction mechanism 8 is provided between the top of the upper mold plate 2 and the outer side of the lower mold base 1. A cooling mechanism 9 is provided between the back of the lower mold base 1 and the interior of the lower mold base 1. The movable end of the cylinder 3 is fixedly connected to the side connecting lug 4. There are multiple sets of cylinder 3 and side connecting lug 4. Multiple sets of cylinder 3 are symmetrically arranged on both sides of the lower mold base 1. Multiple sets of side connecting lug 4 are symmetrically arranged on both sides of the upper mold plate 2. There are multiple sets of tubular mold cavity 5 and liquid inlet mechanism 7.

[0021] Reference Figure 1 , Figure 3 and Figure 4 The liquid inlet mechanism 7 includes a tubular mold core 71 and a diversion pipe 72. The tubular mold core 71 is fixedly connected to one lower end of the upper mold plate 2, and the diversion pipe 72 is fixedly connected to one inner end of the upper mold plate 2. The liquid inlet pipe 73 is connected to the upper end of the tubular mold core 71, and the liquid outlet cavity 74 is symmetrically opened on both sides of the upper part of the tubular mold core 71. The top of the manifold 72 is fixedly connected to the bottom of the inlet pipe 73. The manifold 72 and the outlet cavity 74 are interconnected. Molten medical-grade plastic is transported to the manifold 72 inside the upper mold plate 2 through the inlet pipe 73 by an external injection molding device. The manifold 72 evenly distributes the injection liquid to the outlet cavities 74 on both sides of the tubular mold core 71. The interconnected structure of the manifold 72 and the outlet cavity 74 allows the injection liquid to flow from both sides of the tubular mold core 71 into the gap formed between the tubular mold cavity 5 and the tubular mold core 71. This allows the injection liquid to flow smoothly into the gap from both sides, avoiding local insufficient filling or air bubbles, and ensuring the consistency of multiple products.

[0022] Reference Figure 1 and Figure 5 The suction mechanism 8 includes a suction nozzle 81, a suction tube 82, and a main air pipe 83. The suction nozzle 81 is fixedly connected to the upper part of the upper template 2 and is connected to the through air groove 6. The suction tube 82 is fixedly connected to one end of the suction nozzle 81, and the main air pipe 83 is fixedly connected to one end of the upper template 2. Air pump 84 and folding telescopic tube 85, the air pump 84 is located on the outer side of the lower mold base 1, and the folding telescopic tube 85 is fixedly connected to the air inlet of the air pump 84. Multiple sets of suction nozzles 81 and suction tubes 82 are provided. The other end of each set of suction tubes 82 is fixedly connected to the main air pipe 83. The top of the folding telescopic tube 85 is fixedly connected to the bottom of the main air pipe 83. When the air pump 84 is started, the air inlet of the air pump 84 is connected to the main air pipe 83 through the folding telescopic tube 85. The main air pipe 83 is then connected to multiple sets of suction nozzles 81 arranged horizontally above the upper template 2 through multiple sets of suction tubes 82. The suction nozzles 81 are connected to the through air groove 6 inside the upper template 2, and the lower end of the through air groove 6 corresponds to the opening position of the tubular mold cavity 5. When the air pump 84 is working, it passes through the upper... The air passage forms a negative pressure in the through air groove 6. The negative pressure acts on the top of the injection tube, generating an adsorption force on the cooled injection tube. The folded telescopic tube 85 can flexibly extend and retract with the upper mold plate 2 as the upper mold plate 2 moves upward during subsequent mold opening, ensuring that the negative pressure air passage is always unobstructed and does not affect the mold suction effect. Then, the cylinder 3 pushes the side connecting ear block 4, which drives the upper mold plate 2 to move upward, realizing mold opening. In this way, the injection tube fitted on the tubular mold core 71 is pulled out of the tubular mold cavity 5 by the negative pressure, completing the demolding of the product.

[0023] Reference Figures 1 to 6 The cooling mechanism 9 includes a coolant tank 91, a multi-bend cooling pipe 92, and a liquid pump 93. The coolant tank 91 is located on the back of the lower mold base 1, the multi-bend cooling pipe 92 is fixedly connected to the inside of the lower mold base 1, and the liquid pump 93 is fixedly connected to one end of the front of the coolant tank 91. The outlet of the multi-bend cooling pipe 92 extends out of the lower mold base 1 and is fixedly connected to the coolant tank 91. The inlet of the multi-bend cooling pipe 92 extends out of the lower mold base 1 and is fixedly connected to the outlet of the liquid pump 93. There are two sets of multi-bend cooling pipes 92 and liquid pumps 93. The cooling medium in the coolant tank 91 is driven by the liquid pump 93 and enters the lower mold base 1 through the inlet of the multi-bend cooling pipe 92. The two sets of multi-bend cooling pipes 92 are distributed in a meandering manner in the mold base and are closely attached to the outer wall of the tubular mold cavity 5. They quickly absorb the heat of the injection molding liquid through heat conduction, so that the molten plastic gradually solidifies and forms a shape. The cooling medium that has completed heat exchange flows back to the coolant tank 91 from the outlet of the multi-bend cooling pipe 92 to form a circulating cooling. It can quickly and evenly absorb heat, shorten the plastic solidification time, improve the production rhythm, and use the principle of thermal expansion and contraction to make the product fit on the tubular mold core 71 after molding and cooling, which is convenient for subsequent removal.

[0024] The working principle of this utility model is as follows: In use, the cylinders 3 on both sides of the lower mold base 1 drive the side connecting lugs 4 on both sides of the upper mold plate 2, which are fixedly connected to it, and move the upper mold plate 2 towards the lower mold base 1. Since the cylinders 3 and the side connecting lugs 4 are one-to-one and symmetrically distributed, it can ensure that the upper mold plate 2 is evenly stressed during the movement and avoids deviation. When the upper mold plate 2 and the lower mold base 1 are completely fitted, the tubular mold core 71 below the upper mold plate 2 is precisely embedded in the tubular mold cavity 5 of the lower mold base 1. The two together form the closed molding cavity of the medical injection tube, complete the mold closing action, and prepare for the subsequent injection of the injection liquid. Molten medical-grade plastic is delivered to the distribution pipe 72 inside the upper mold plate 2 through the inlet pipe 73 by an external injection molding device. The distribution pipe 72 evenly distributes the injection liquid to the outlet cavities 74 on both sides of the tubular mold core 71. The through structure of the distribution pipe 72 and the outlet cavity 74 allows the injection liquid to flow from both sides of the tubular mold core 71 into the gap formed between the tubular mold cavity 5 and the tubular mold core 71. This allows the injection liquid to flow smoothly into the gap from both sides, avoiding local incomplete filling or air bubbles, and ensuring the consistency of multiple products. Since the tubular mold cavity 5, the tubular mold core 71 and the inlet mechanism 7 are all equipped with multiple sets and correspond one-to-one, multiple medical injection tubes can be formed through multiple distribution pipes 72, which greatly improves production efficiency. Driven by the liquid pump 93, the cooling medium in the coolant tank 91 enters the lower mold base 1 through the inlet of the multi-bend cooling pipe 92. The two sets of multi-bend cooling pipes 92 are distributed in a meandering manner in the mold base, closely fitting the outer wall of the tubular mold cavity 5. Through heat conduction, they quickly absorb the heat of the injection molding liquid, causing the molten plastic to gradually solidify and form. The cooling medium that has completed heat exchange flows back to the coolant tank 91 from the outlet of the multi-bend cooling pipe 92, forming a circulating cooling system. This system can quickly and evenly absorb heat, shorten the plastic solidification time, improve the production rhythm, and utilize the principle of thermal expansion and contraction to allow the product to be fitted onto the tubular mold core 71 after molding and cooling, making it easy to remove later. The air pump 84 is started. The air inlet of the air pump 84 is connected to the main air pipe 83 through the folded telescopic tube 85. The main air pipe 83 is then connected to multiple sets of suction tubes 82 and multiple sets of suction nozzles 81 arranged horizontally above the upper mold plate 2. The suction nozzles 81 are connected to the through air groove 6 inside the upper mold plate 2. The lower end of the through air groove 6 corresponds to the opening position of the tubular mold cavity 5. When the air pump 84 is working, a negative pressure is formed in the through air groove 6 through the above air path. The negative pressure acts on the top of the injection tube, generating an adsorption force on the cooled injection tube. The folded telescopic tube 85 is used because the upper mold plate 2 will move towards the upper mold plate 2 during subsequent mold opening. The folding telescopic tube 85 moves upward and can flexibly extend and retract with the movement of the upper template 2, ensuring that the negative pressure air path is always unobstructed and does not affect the suction effect. Then, the cylinder 3 pushes the side connecting ear block 4, which drives the upper template 2 to move upward and realize the mold opening. In this way, the injection tube fitted on the tubular mold core 71 is pulled out of the tubular mold cavity 5 by the negative pressure, completing the demolding of the product. This flexible demolding method can effectively prevent defects such as tube collapse and tube scratches, ensure the surface smoothness and structural integrity of the medical injection tube, and improve the stability of demolding and avoid falling off.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A demolding mechanism for medical injection molding tube processing, characterized in that, include: The lower mold base (1) and the upper mold plate (2) are provided. A cylinder (3) is fixedly connected to one side of the lower mold base (1). A side connecting lug (4) is fixedly connected to one side of the upper mold plate (2). A tubular mold cavity (5) is opened at one end of the interior of the lower mold base (1). Several sets of through air grooves (6) are opened inside the upper mold plate (2). A liquid inlet mechanism (7) is provided between the top and bottom of the upper mold plate (2). A suction mold mechanism (8) is provided between the top of the upper mold plate (2) and the outer side of the lower mold base (1). A cooling mechanism (9) is provided between the back of the lower mold base (1) and the interior of the lower mold base (1).

2. The demolding mechanism for medical injection molding tube processing according to claim 1, characterized in that, The liquid inlet mechanism (7) includes: The tubular mold core (71) and the diversion pipe (72) are fixedly connected to the lower end of the upper template (2) and the diversion pipe (72) is fixedly connected to the inner end of the upper template (2). The liquid inlet pipe (73) and the liquid outlet cavity (74) are connected to the upper end of the tubular mold core (71), and the liquid outlet cavity (74) is symmetrically opened on both sides of the upper part of the tubular mold core (71).

3. The demolding mechanism for medical injection molding tube processing according to claim 1, characterized in that, The suction mold mechanism (8) includes: The suction nozzle (81), the straw (82), and the main air pipe (83) are fixedly connected to the upper template (2) and are connected to the through air groove (6). The straw (82) is fixedly connected to one end of the suction nozzle (81), and the main air pipe (83) is fixedly connected to one end of the upper template (2). An air pump (84) and a folding telescopic tube (85) are provided. The air pump (84) is located on the outer side of the lower mold base (1), and the folding telescopic tube (85) is fixedly connected to the air inlet of the air pump (84).

4. The demolding mechanism for medical injection molding tube processing according to claim 1, characterized in that, The cooling mechanism (9) includes: Coolant tank (91), multi-bend cooling pipe (92) and liquid pump (93), wherein the coolant tank (91) is located on the back of the lower mold base (1), the multi-bend cooling pipe (92) is fixedly connected to the inside of the lower mold base (1), and the liquid pump (93) is fixedly connected to one end of the front of the coolant tank (91). The outlet of the multi-bend cooling pipe (92) extends out of the lower mold base (1) and is fixedly connected to the coolant tank (91). The inlet of the multi-bend cooling pipe (92) extends out of the lower mold base (1) and is fixedly connected to the outlet of the liquid pump (93). There are two sets of both the multi-bend cooling pipe (92) and the liquid pump (93).

5. The demolding mechanism for medical injection molding tube processing according to claim 1, characterized in that, The movable end of the cylinder (3) is fixedly connected to the side connecting lug (4). There are multiple sets of cylinders (3) and side connecting lugs (4). Multiple sets of cylinders (3) are symmetrically arranged on both sides of the lower mold base (1). Multiple sets of side connecting lugs (4) are symmetrically arranged on both sides of the upper mold plate (2). There are multiple sets of tubular mold cavity (5) and liquid inlet mechanism (7).

6. The demolding mechanism for medical injection molding tube processing according to claim 2, characterized in that, The top of the diversion pipe (72) is fixedly connected to the bottom of the inlet pipe (73), and the diversion pipe (72) and the outlet cavity (74) are interconnected.

7. The demolding mechanism for medical injection molding tube processing according to claim 3, characterized in that, The number of the suction nozzle (81) and the suction tube (82) are both provided in multiple sets. The other end of each set of suction tubes (82) is fixedly connected to the main air pipe (83). The top of the foldable telescopic tube (85) is fixedly connected to the bottom of the main air pipe (83).

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