Injector needle cylinder injection mold convenient to demold

Abstract

The utility model relates to the technical field of injection molds, and discloses an injector needle cylinder injection mold convenient to demold, which comprises a frame body, an injection molding machine is fixedly connected to the top end face of the frame body, an electric push rod is fixedly connected to the inner wall of the frame body, and the injection molding machine is fixedly connected to the inner wall of the frame body. The output end of the electric push rod is rotationally connected with a movable mold, and an ejection assembly is arranged on the side wall of the movable mold. According to the injector needle cylinder injection mold convenient to demold, multiple points act at the same time, force is more evenly distributed, structural damage caused by single-point force application is avoided, injector deformation is prevented, the demolding success rate is increased, the spiral rod drives the movable mold to rotate, the injector is subjected to the action of centrifugal force, demolding auxiliary force is increased, dependence on ejection force is reduced, and the demolding efficiency is improved; and the rubber sheet flaps the movable mold to cause slight vibration of the movable mold, so that the adhesive force between the mold core and a product is reduced, and the injector is easier to separate from the mold core.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for syringe barrels that is easy to demold. Background Technology

[0002] The advantages of injection molding are high production speed and efficiency, automated operation, a wide variety of colors and patterns, shapes ranging from simple to complex, sizes ranging from large to small, precise product dimensions, easy product updates and replacements, and the ability to produce complex-shaped parts. Injection molding is suitable for mass production and molding processing fields such as complex-shaped products.

[0003] However, current syringe injection molds that facilitate demolding are inconvenient for ejecting the finished syringe due to the slender shape of medical syringes. Therefore, we propose a syringe injection mold that facilitates demolding. Utility Model Content

[0004] The purpose of this invention is to provide a syringe syringe injection mold that is easy to demold, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a syringe barrel injection mold for easy demolding, comprising a frame, an injection molding machine fixedly connected to the top end face of the frame, an electric push rod fixedly connected to the inner wall of the frame, a moving mold rotatably connected to the output end of the electric push rod, and an ejection assembly provided on the side wall of the moving mold, the ejection assembly comprising:

[0006] A transverse groove, which is sleeved with a straight ejector rod;

[0007] A guide rail is slidably connected to a spiral sleeve. A spiral rod is sleeved on one end of the spiral sleeve away from the guide rail, and a top plate is fixedly connected to the other end of the spiral rod away from the spiral sleeve.

[0008] A straight through hole is provided on the side of the moving mold near the electric push rod, and a spiral through hole is provided on the side wall of the moving mold.

[0009] Preferably, a collection tray is fixedly connected to the internal ground of the frame, a screw conveyor is fixedly connected to the side wall of the injection molding machine, a stationary mold is fixedly connected to the output end of the screw conveyor, a guide rod is fixedly connected to the side wall of the stationary mold, and a mounting bracket is sleeved on the side wall of the guide rod.

[0010] Preferably, the sidewall of the moving mold is provided with an annular groove, and the number of annular grooves is set to several sets, and the several sets of annular grooves are rotatably connected to the inner wall of the mounting frame.

[0011] Preferably, the transverse groove is formed on the side wall of the electric push rod, the linear ejector rod is sleeved with the linear through hole, the end face of the linear ejector rod abuts against the connector of the syringe, and the linear ejector rod pushes the syringe out.

[0012] Preferably, the guide rail is fixedly connected to the side wall of the frame, and the ejector plate abuts against the finger support of the syringe, preventing deformation of the syringe by pushing out from multiple points.

[0013] Preferably, the spiral through hole is sleeved with the spiral rod, and there are two sets of spiral rods and spiral sleeves. The two sets of spiral rods and spiral sleeves rotate in the same direction. The spiral rod drives the moving mold to rotate, so that the syringe is subjected to centrifugal force, which promotes the demolding of the syringe.

[0014] Preferably, a rubber sheet is fixedly connected to the inner wall of the frame, and the rubber sheet is movably connected to the annular groove.

[0015] Compared with the prior art, this utility model provides a syringe barrel injection mold that is easy to demold, and has the following beneficial effects:

[0016] 1. This easy-to-demold syringe barrel injection mold, through the set ejection component, allows multiple points to act simultaneously, resulting in a more even distribution of force. This avoids structural damage caused by single-point force application, prevents syringe deformation, and improves the demolding success rate. The spiral rod rotates the moving mold, causing the syringe to be subjected to centrifugal force, increasing the demolding assistance force, reducing dependence on ejection force, and improving demolding efficiency.

[0017] 2. This easy-to-demold syringe barrel injection mold uses a rubber sheet to tap the moving mold, causing slight vibrations. This helps to break the negative pressure and reduce the adhesion between the mold core and the product, making it easier for the syringe to detach from the mold core and improving the demolding success rate. At the same time, this flexible disturbance method is gentler than metal impact or mechanical vibration, protecting the mold and the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the frame structure of this utility model;

[0020] Figure 3 This utility model Figure 2 Schematic diagram of the structure of region A in the middle;

[0021] Figure 4 This is an exploded view of the moving model of this utility model;

[0022] Figure 5 This utility model Figure 4 Schematic diagram of the structure of region B in the middle;

[0023] Figure 6 This utility model Figure 4 Schematic diagram of the structure of region C in the middle;

[0024] Figure 7 This utility model Figure 4 Schematic diagram of the structure of region D in the middle;

[0025] Figure 8 This is a schematic diagram of the linear ejector rod structure of this utility model.

[0026] In the diagram: 1. Frame; 2. Injection molding machine; 3. Screw conveyor; 4. Stationary mold; 5. Guide rod; 6. Electric push rod; 7. Moving mold; 8. Ejection assembly; 801. Horizontal groove; 802. Linear ejector rod; 803. Guide rail; 804. Screw sleeve; 805. Screw rod; 806. Ejection plate; 807. Linear through hole; 808. Screw through hole; 9. Collection tray; 10. Annular groove; 11. Rubber sheet; 12. Mounting bracket. Detailed Implementation

[0027] like Figures 1-8 As shown, this utility model provides a technical solution: a syringe syringe injection mold that is easy to demold, including a frame 1, an injection molding machine 2 fixedly connected to the top end face of the frame 1, an electric push rod 6 fixedly connected to the inner wall of the frame 1, a moving mold 7 rotatably connected to the output end of the electric push rod 6, and an ejection assembly 8 provided on the side wall of the moving mold 7. The ejection assembly 8 includes a transverse groove 801, a linear ejection rod 802, a guide rail 803, a spiral sleeve 804, a spiral rod 805, an ejection plate 806, a linear through hole 807, and a spiral through hole 808.

[0028] In one embodiment of this utility model, a transverse groove 801 is formed on the side wall of the electric push rod 6. The transverse groove 801 is sleeved with the linear ejector rod 802. The linear ejector rod 802 is sleeved with the linear through hole 807. The end face of the linear ejector rod 802 abuts against the connector of the syringe. The linear ejector rod 802 pushes out the syringe.

[0029] The guide rail 803 is fixedly connected to the side wall of the frame 1. The guide rail 803 is slidably connected to the spiral sleeve 804. A spiral rod 805 is sleeved on the end of the spiral sleeve 804 away from the guide rail 803. An ejector plate 806 is fixedly connected to the end of the spiral rod 805 away from the spiral sleeve 804. The ejector plate 806 abuts against the finger support part of the syringe. By pushing out at multiple points, the syringe is prevented from deforming.

[0030] A straight through hole 807 is provided on the side of the moving mold 7 near the electric push rod 6. A spiral through hole 808 is provided on the side wall of the moving mold 7. The spiral through hole 808 is sleeved with a spiral rod 805. There are two sets of spiral rods 805 and spiral sleeves 804. The two sets of spiral rods 805 and spiral sleeves 804 rotate in the same direction. The guiding effect of the spiral rod 805 causes the moving mold 7 to rotate, so that the syringe is subjected to centrifugal force, which promotes the demolding of the syringe.

[0031] A collection tray 9 is fixedly connected to the internal ground of the frame 1. A screw conveyor 3 is fixedly connected to the side wall of the injection molding machine 2. A stationary mold 4 is fixedly connected to the output end of the screw conveyor 3. A guide rod 5 is fixedly connected to the side wall of the stationary mold 4. A mounting bracket 12 is sleeved on the side wall of the guide rod 5. An annular groove 10 is opened on the side wall of the moving mold 7. Several sets of annular grooves 10 are provided. The several sets of annular grooves 10 are rotatably connected to the inner wall of the mounting bracket 12.

[0032] The injection molding machine 2 conveys molten plastic through the screw conveyor 3 between the stationary mold 4 and the moving mold 7. After the plastic solidifies, the electric push rod 6 moves the moving mold 7 away from the stationary mold 4. At this time, the screw sleeve 804 rotates along the guide rail 803. When the screw sleeve 804 abuts against the inner wall of the guide rail 803 and the linear ejector rod 802 abuts against the side wall of the guide rail 803, the linear ejector rod 802 pushes out the syringe through the connector of the syringe, and the ejector plate 806 pushes out the syringe through the finger support of the syringe. Multiple points act simultaneously, the force is more evenly distributed, avoids structural damage caused by single-point force application, prevents syringe deformation, and improves the demolding success rate.

[0033] After the spiral sleeve 804 abuts against the inner wall of the guide rail 803, the spiral rod 805 rotates along the spiral sleeve 804, causing the spiral rod 805 to rotate with the moving mold 7, so that the syringe is subjected to centrifugal force, increasing the demolding auxiliary force, reducing the dependence on ejection force, and improving demolding efficiency.

[0034] In addition, a rubber sheet 11 is fixedly connected to the inner wall of the frame 1. The rubber sheet 11 is movably connected to the annular groove 10. When the moving mold 7 moves to the left and comes into contact with the rubber sheet 11, the rubber sheet 11 continuously enters the annular groove 10 and then exits the annular groove 10, causing the rubber sheet 11 to deform and then hit the moving mold 7, causing the moving mold 7 to vibrate slightly. This helps to break the negative pressure and reduce the adhesion between the mold core and the product, making it easier for the syringe to detach from the mold core and improving the demolding success rate. At the same time, this flexible disturbance method is gentler than metal impact or mechanical vibration, protecting the mold and the product.

[0035] In this invention, during use, the injection molding machine 2 conveys molten plastic through the screw conveyor 3 between the stationary mold 4 and the moving mold 7. After the plastic solidifies, the electric push rod 6 moves the moving mold 7 away from the stationary mold 4. At this time, the screw sleeve 804 rotates along the guide rail 803. When the screw sleeve 804 abuts against the inner wall of the guide rail 803 and the linear ejector rod 802 abuts against the side wall of the guide rail 803, the linear ejector rod 802 pushes out the syringe through the syringe connector. The ejector plate 806 pushes out the syringe through the syringe finger support. Multiple points act simultaneously to prevent the syringe from deforming. After the screw sleeve 804 abuts against the inner wall of the guide rail 803, the screw rod 805 rotates along the screw sleeve 804, causing the screw rod 805 to rotate the moving mold 7. This causes the syringe to be subjected to centrifugal force, increasing the demolding assistance force and reducing the dependence on ejection force.

[0036] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A syringe syringe injection mold for easy demolding, comprising a frame (1), wherein an injection molding machine (2) is fixedly connected to the top end face of the frame (1), characterized in that: An electric push rod (6) is fixedly connected to the inner wall of the frame (1). The output end of the electric push rod (6) is rotatably connected to a moving mold (7). An ejection assembly (8) is provided on the side wall of the moving mold (7). The ejection assembly (8) includes: A transverse groove (801) is sleeved with a straight ejector rod (802); The guide rail (803) is slidably connected to the spiral sleeve (804). A spiral rod (805) is sleeved on one end of the spiral sleeve (804) away from the guide rail (803). A top plate (806) is fixedly connected to one end of the spiral rod (805) away from the spiral sleeve (804). A straight through hole (807) is provided on the side of the moving mold (7) near the electric push rod (6), and a spiral through hole (808) is provided on the side wall of the moving mold (7).

2. The syringe syringe injection mold for easy demolding according to claim 1, characterized in that: A collection tray (9) is fixedly connected to the internal ground of the frame (1), a screw conveyor (3) is fixedly connected to the side wall of the injection molding machine (2), a stationary mold (4) is fixedly connected to the output end of the screw conveyor (3), a guide rod (5) is fixedly connected to the side wall of the stationary mold (4), and an installation bracket (12) is sleeved on the side wall of the guide rod (5).

3. The syringe syringe injection mold for easy demolding according to claim 2, characterized in that: The side wall of the moving mold (7) is provided with an annular groove (10), and the number of annular grooves (10) is set in several groups. The several groups of annular grooves (10) are rotatably connected to the inner wall of the mounting frame (12).

4. The syringe syringe injection mold for easy demolding according to claim 1, characterized in that: The transverse groove (801) is formed on the side wall of the electric push rod (6), the linear ejector rod (802) is sleeved with the linear through hole (807), and the end face of the linear ejector rod (802) abuts against the connector of the syringe.

5. The syringe syringe injection mold for easy demolding according to claim 1, characterized in that: The guide rail (803) is fixedly connected to the side wall of the frame (1), and the ejector plate (806) abuts against the finger support of the syringe.

6. The syringe barrel injection mold for easy demolding according to claim 1, characterized in that: The spiral through hole (808) is sleeved with the spiral rod (805). There are two sets of spiral rods (805) and spiral sleeves (804), and the two sets of spiral rods (805) and spiral sleeves (804) rotate in the same direction.

7. The syringe syringe injection mold for easy demolding according to claim 1, characterized in that: A rubber sheet (11) is fixedly connected to the inner wall of the frame (1), and the rubber sheet (11) is movably connected to the annular groove (10).

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