Ball-point pen sheath injection mold

Abstract

The ballpoint pen sheath injection mold comprises a fixed mold body and a movable mold body, a guide rod is obliquely arranged on the fixed mold body, two oppositely-opened mold cores are movably connected to the movable mold body, and guide holes corresponding to the guide rod are formed in the two mold cores correspondingly; grooves are formed in the sides, close to each other, of the two mold cores, the grooves in the two mold cores form a mold cavity, the fixed mold and the movable mold are provided with a first mold core and a second mold core respectively, the first mold core and the second mold core can both be inserted into the mold cavity, and internal threads are arranged on the mold cavity. And the second mold core is movably connected with the movable mold and is connected with a driving mechanism. The first mold core and the second mold core are arranged on the fixed mold and the movable mold correspondingly, the first mold core and the second mold core are combined with the mold cavities in the mold cores for injection molding, meanwhile, the fixed mold moves to drive the second mold core to move during mold opening, and the second mold core is sleeved with a sheath subjected to injection molding; and finally, the sheath can be removed by moving the second mold core, and demolding is convenient.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a ballpoint pen sheath injection mold. Background Art

[0002] Ballpoint pens are widely used because of their durability and replaceable refills. Currently, most ballpoint pens are made of plastic and use threads to connect the upper and lower parts. Among them, the ballpoint pen shell, also called the sheath, is mostly made by injection molding. During the injection molding process of the sheath, since the sheath is provided with threads, it is inconvenient to separate during demoulding.

[0003] There are some molds in the prior art that achieve the effect of thread stripping by designing the mold structure. For example, a Chinese patent with authorization announcement number CN104924549B and publication date June 20, 2017 discloses a pen cap thread injection mold, including a core insert, a central core rod, a pipe thread core, a bearing, a secondary intermediate transmission gear, an intermediate gear shaft, a power bevel gear, a driven bevel gear, a primary intermediate transmission gear and other components. The application performs thread stripping by setting gears on the mold, which has a complex structure and low efficiency. Therefore, it is necessary to design a new ballpoint pen sheath injection mold that can facilitate demolding. Utility Model Content

[0004] The present application provides a ballpoint pen sheath injection mold which is easy to demould.

[0005] The ballpoint pen sheath injection mold provided in this application adopts the following technical solution:

[0006] A ballpoint pen sheath injection mold comprises a fixed mold and a movable mold, wherein a guide rod is obliquely arranged on the fixed mold, two opposed cores are movably connected on the movable mold, and the two cores are respectively provided with guide holes corresponding to the guide rods, grooves are arranged on the sides of the two cores close to each other, and the grooves on the two cores constitute a cavity, a first core and a second core are respectively arranged on the fixed mold and the movable mold, and the first core and the second core can be inserted into the cavity, an internal thread is arranged on the cavity, and the second core is movably connected to the movable mold and a driving mechanism is connected to the second core.

[0007] Preferably, the fixed mold and the movable mold are connected by guide sleeves and guide rods, and the movable mold can move in the horizontal direction, and the guide rods are arranged obliquely outward on the left and right sides of the fixed mold.

[0008] Preferably, a positioning ring is provided on one side of the fixed mold, a diverter plate is provided on the other side of the fixed mold, and a diverter groove is provided on one side of the diverter plate close to the core, the diverter groove can be connected to the cavity, and the first mold core is provided on the side of the diverter groove.

[0009] Preferably, a groove corresponding to the diverter plate is provided on a side of the core close to the fixed mold.

[0010] Preferably, a groove is provided on one side of the movable mold and the core is slidably provided in the groove, a connecting block is provided on the other side of the movable mold and the second core is provided on the connecting block, and a driving mechanism is connected to the connecting block.

[0011] Preferably, the cross-section of the core is a right-angled trapezoid and the sides of the two cores that are close to each other are right-angled sides, the inclination angle of the side of the core is equal to the angle of the guide rod, the end of the core is higher than the height of the movable mold, and the fixed mold is provided with a groove corresponding to the shape of the core.

[0012] Preferably, the movable mold is provided with a fixing block and the fixing block is located at the upper and lower ends of the movable mold, the fixing block is provided with a connecting protrusion, and the core is provided with a groove corresponding to the connecting protrusion.

[0013] Preferably, the first mold core and the second mold core are both cylindrical, and the ends of the first mold core and the second mold core are connected.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. The present application respectively arranges guide rods and cores on the fixed mold and the movable mold, and can realize the movement of the core by tilting the guide rods, thereby realizing the mold closing and mold opening effects. At the same time, the fixed mold and the movable mold are respectively provided with a first mold core and a second mold core. The first mold core and the second mold core are combined with the cavity on the core for injection molding. At the same time, when the mold is opened, the second mold core is driven to move by the movement of the fixed mold. The injection-molded sleeve is placed on the second mold core, and the sleeve can finally be removed by moving the second mold core, so that demolding is convenient.

[0016] 2. By setting a manifold on the fixed mold and a manifold groove on the manifold, uniform injection can be ensured to ensure the injection molding effect; at the same time, a groove corresponding to the size of the manifold is set on the core to ensure that the manifold is tightly connected to the core when the mold is closed to avoid leakage.

[0017] 3. By arranging a core on one side of the movable mold and a connecting block on the other side of the movable mold, and connecting the connecting block with a driving mechanism, the connecting block can be driven to move by the driving mechanism, thereby driving the second mold core to move, and finally achieving demolding.

[0018] 4. By setting a fixed block on the movable mold, setting a connecting protrusion on the fixed block, and setting a groove corresponding to the connecting protrusion on the core, the fixed block can limit the position of the core 4 and at the same time can support the core to ensure the stability of the core position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the ballpoint pen sheath injection mold in the preferred embodiment of the present application.

[0020] Figure 2 It is an exploded view of the ballpoint pen sheath injection mold in the preferred embodiment of the present application.

[0021] Figure 3 It is an exploded view from another perspective of the ballpoint pen sheath injection mold in the preferred embodiment of the present application.

[0022] Figure 4 It is a schematic diagram of the structure of the diverter plate in the preferred embodiment of the present application.

[0023] Figure 5 It is a stereoscopic diagram of the ballpoint pen sheath injection mold in the preferred embodiment of the present application when in use.

[0024] Figure 6 It is a top view of the ballpoint pen sheath injection mold in the preferred embodiment of the present application when in use.

[0025] Explanation of the accompanying drawings: 1. fixed mold; 2. movable mold; 3. guide rod; 4. core; 401. guide hole; 402. cavity; 5. first mold core; 6. second mold core; 7. diverter plate; 701. diverter groove; 8. connecting block; 9. fixed block; 10. sheath. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings.

[0027] The embodiment of the present application discloses a ballpoint pen sheath injection mold.

[0028] Reference Figures 1 to 6 A ballpoint pen sheath injection mold comprises a fixed mold 1 and a movable mold 2, the fixed mold 1 and the movable mold 2 are connected by a guide sleeve and a guide rod and the movable mold 2 can move in a horizontal direction, a guide rod 3 is obliquely arranged on the fixed mold 1, and the guide rod 3 is obliquely arranged outwardly. In this embodiment, there are four guide rods 3 and they are arranged in pairs on the left and right sides of the fixed mold 1, two opposing cores 4 are movably connected to the movable mold 2, and the two cores 4 are respectively provided with guide holes 401 corresponding to the guide rods 3, a groove is provided on the side where the two cores 4 are close to each other, and the grooves on the two cores 4 constitute a cavity 402, during the movement of the movable mold 2, the core 4 can be driven to move through the cooperation of the guide hole 401 and the guide rod 3, thereby realizing mold opening and mold closing, and realizing injection molding in combination with the cavity 402.

[0029] Reference Figures 2 to 4A positioning ring is provided on one side of the fixed mold 1, a diverter plate 7 is provided on the other side of the fixed mold 1, and a diverter groove 701 is provided on the side of the diverter plate 7 close to the core 4, and the diverter groove 701 can be connected with the cavity 402. A groove corresponding to the diverter plate 7 is provided on the side of the core 4 close to the fixed mold 1. When the mold is closed for injection molding, the diverter plate 7 can be embedded in the groove to ensure that the diverter groove 701 is tightly connected with the cavity 402.

[0030] Reference Figures 2 to 6 The fixed mold 1 and the movable mold 2 are respectively provided with a first mold core 5 and a second mold core 6, and the first mold core 5 and the second mold core 6 can be inserted into the mold cavity 402. Specifically, the first mold core 5 is arranged on the side of the diverter groove 701, a groove is arranged on one side of the movable mold 2, and a mold core 4 is slidably arranged in the groove, and a connecting block 8 is arranged on the other side of the movable mold 2, and a second mold core 6 is arranged on the connecting block 8, and a driving mechanism is connected to the connecting block 8, and the driving mechanism can drive the connecting block 8 to move; the first mold core 5 and the second mold core 6 are both cylindrical The ends of the first mold core 5 and the second mold core 6 are connected. In this embodiment, the first mold core 5 and the second mold core 6 are provided with corresponding grooves and protrusions to ensure that the first mold core 5 and the second mold core 6 are tightly connected to ensure the quality of the finished product; the cavity 402 is provided with an internal thread, and the second mold core 6 is movably connected to the movable mold 2. When the mold is opened, the injection-molded sleeve 10 can be inserted into the second mold core 6 by moving the movable mold 2. Finally, the second mold core 6 is moved to make the sleeve 10 fall into the storage box, which is convenient for demolding.

[0031] Reference Figures 2 to 6 The cross section of the core 4 is a right-angled trapezoid and the sides of the two cores 4 that are close to each other are right-angled sides. The inclination angle of the side of the core 4 is equal to the angle of the guide rod 3. The end of the core 4 is higher than the height of the movable mold 2. The fixed mold 1 is provided with a groove corresponding to the shape of the core 4; the movable mold 2 is provided with a fixed block 9 and the fixed block 9 is located at the upper and lower ends of the movable mold 4. The fixed block 9 is provided with a connecting convex portion, and the core 4 is provided with a groove corresponding to the connecting convex portion. The fixed block 9 is used to limit the position of the core 4 and can also support the core 4.

[0032] The implementation principle is as follows: the fixed mold 1 of the present application is fixedly installed and the positioning ring on the fixed mold 1 is connected to the injection port of the injection molding machine, a hole is provided in the positioning ring and the hole is connected to the diverter groove 701 on the diverter plate 7; when in use, the fixed mold 1 and the movable mold 2 are first molded together, and the movable mold 2 moves to drive the core 4 thereon to move in the direction close to the fixed mold 1, and at the same time, the two cores 4 are close to each other, and when the molds are completely closed, the two cores 4 are completely merged, the diverter plate 7 is embedded in the groove on the core 4, the cavity 401 is connected to the diverter groove 701, and at the same time, the first mold core 5 and the second mold core 6 are inserted into the cavity and the ends of the first mold core 5 and the second mold core 6 are connected; the injection molding machine starts to inject material, and the molten liquid raw material enters the cavity 401 through the injection port and the diverter groove 701, and demolding begins after the injection molding is cooled;

[0033] During demolding, the movable mold 2 moves away from the fixed mold 1, and at the same time drives the core 4 to move along the guide rod 3, thereby driving the two cores 4 to open, and the injection-molded sleeve 10 is sleeved on the second core 6 and moves with the movable mold 2. Finally, the connecting block 8 is driven outward by the driving mechanism to take off the sleeve 10 sleeved on the second core 6. The detached sleeve 110 can directly fall into the storage box under the movable mold 2, which is convenient for demolding and material collection.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ballpoint pen sheath injection mold, characterized in that: The invention comprises a fixed mold (1) and a movable mold (2), wherein a guide rod (3) is obliquely arranged on the fixed mold (1), and two split cores (4) are movably connected on the movable mold (2), and the two cores (4) are respectively provided with guide holes (401) corresponding to the guide rods (3), and grooves are arranged on the sides of the two cores (4) close to each other, and the grooves on the two cores (4) form a mold cavity (402), and the fixed mold (1) and the movable mold (2) are respectively provided with a first mold core (5) and a second mold core (6), and the first mold core (5) and the second mold core (6) can both be inserted into the mold cavity (402), and the mold cavity (402) is provided with an internal thread, and the second mold core (6) is movably connected to the movable mold (2), and the second mold core (6) is connected to a driving mechanism.

2. The ballpoint pen sheath injection mold according to claim 1, characterized in that: The fixed mold (1) and the movable mold (2) are connected via guide sleeves and guide rods, and the movable mold (2) can move in a horizontal direction. The guide rods (3) are arranged obliquely outward on the left and right sides of the fixed mold (1).

3. The ballpoint pen sheath injection mold according to claim 1, characterized in that: A positioning ring is provided on one side of the fixed mold (1), a diverter plate (7) is provided on the other side of the fixed mold (1), and a diverter groove (701) is provided on a side of the diverter plate (7) close to the mold core (4), the diverter groove (701) can be connected to the mold cavity (402), and the first mold core (5) is provided on the side of the diverter groove (701).

4. The ballpoint pen sheath injection mold according to claim 3, characterized in that: A groove corresponding to the diverter plate (7) is provided on one side of the core (4) close to the fixed mold (1).

5. The ballpoint pen sheath injection mold according to claim 1, characterized in that: A groove is provided on one side of the movable mold (2) and the core (4) is slidably provided in the groove; a connecting block (8) is provided on the other side of the movable mold (2) and the second core (6) is provided on the connecting block (8); and a driving mechanism is connected to the connecting block (8).

6. The ballpoint pen sheath injection mold according to claim 1, characterized in that: The cross section of the core (4) is a right-angled trapezoid, and the sides of the two cores (4) that are close to each other are right-angled sides. The angle of inclination of the side surface of the core (4) is equal to the angle of the guide rod (3). The end of the core (4) is higher than the height of the movable mold (2), and the fixed mold (1) is provided with a groove corresponding to the shape of the core (4).

7. The ballpoint pen sheath injection mold according to claim 2, characterized in that: The movable mold (2) is provided with a fixing block (9) and the fixing block (9) is located at the upper and lower ends of the movable mold (2). The fixing block (9) is provided with a connecting protrusion, and the core (4) is provided with a groove corresponding to the connecting protrusion.

8. The ballpoint pen sheath injection mold according to claim 1, characterized in that: The first mold core (5) and the second mold core (6) are both cylindrical, and the ends of the first mold core (5) and the second mold core (6) are connected.

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