Cylindrical injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a barrel-shaped injection mold which comprises a bottom plate, fixed vertical rods are arranged at the positions, close to four corners, of the top of the bottom plate, the top ends of the four fixed vertical rods are jointly connected with a top plate, a hydraulic cylinder is arranged in the middle of the top of the bottom plate, and the end of a movable rod of the hydraulic cylinder is fixedly connected with a first movable plate. The top of the first moving plate is provided with four first connecting columns arranged in a matrix mode, the top ends of the four first connecting columns are jointly connected with a connecting plate, and the connecting plate is provided with a demolding assembly. According to the cylindrical injection mold, the hydraulic cylinder drives the first moving plate to move up and down, mold closing and mold opening of the movable mold base and the fixed mold base are achieved, the electric telescopic rod drives the second moving plate to move up and down, and therefore the second moving plate drives the four ejector rods to move synchronously; and the cylindrical injection molding toy sleeved on the cylindrical mold core can be pushed upwards, so that the demolding effect is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a cylindrical injection mold. Background Art

[0002] Injection molds are often used in the production of plastic toys. This type of mold is most commonly used in plastic injection molding machines. In this process, the plastic is first heated and melted in the heating barrel at the bottom of the injection machine, and then pushed by the screw or plunger of the injection machine, it enters the mold cavity through the injection machine nozzle and the mold pouring system. The plastic will cool and harden into shape, and then demold from the mold to obtain the product. Cylindrical injection molds are often used in the toy manufacturing industry because they can produce a large number of plastic toys at a relatively low cost. At the same time, due to the fixed shape of the mold, it can ensure the consistency of size and shape of each toy produced, greatly improving the production efficiency and quality of the toys.

[0003] The patent with publication number CN215434844U discloses an injection mold for a cylindrical structure, comprising a fixed base plate, the top of which is fixedly connected with a fixed bracket; after injection molding, the mold base is moved downward by a hydraulic push rod, and as the movable mold base moves, under the elastic action of a connecting spring, it is used in conjunction with a movable plate, which can effectively prevent the molded product from being stuck on the fixed mold base, prevent the product from falling off, and avoid causing unqualified products. When the movable mold base moves to a certain position, the strong spring in the fixed sleeve and the strong spring in the second mounting groove work synchronously, and the spring in the sleeve cooperates with the movable sleeve rod to lift the sealing sleeve for demolding, and the spring in the mounting groove cooperates with the connecting plate to extend the range of movement of the sealing sleeve, ensure the demolding effect, and because the diameter size of the pipe mouth of the sealing sleeve matches the diameter size of the pipe mouth of the fixed sleeve, the sealing of the equipment is ensured, and the demolding effect is also guaranteed, which is worthy of promotion and use.

[0004] In the specific use of the above-mentioned prior art, although the spring in the sleeve cooperates with the movable sleeve rod to lift the sealing sleeve for demolding, and the spring in the mounting groove is used in conjunction with the connecting plate to extend the movement range of the sealing sleeve and ensure the demolding effect, the strong spring in the fixed sleeve and the strong spring in the second mounting groove need to be in a compressed state during injection molding in order to push the movable sleeve rod to move upward during demolding. In this way, it is necessary to set a structure that can squeeze the movable sleeve rod in the movable mold seat, or to squeeze the movable sleeve rod by the fixed mold seat, which will cause a cavity corresponding to the position of the movable sleeve rod to appear at the bottom of the cylindrical injection molded product, thereby destroying the integrity of the bottom of the cylindrical injection molded product. Therefore, the above-mentioned prior art has defects in actual use. In view of this, we propose a cylindrical injection mold. Utility Model Content

[0005] The purpose of the utility model is to provide a cylindrical injection mold to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A cylindrical injection mold, comprising a bottom plate, a fixed vertical rod is arranged at the top of the bottom plate and near the four corners, the top ends of the four fixed vertical rods are connected to the top plate, a hydraulic cylinder is arranged in the middle of the top of the bottom plate, the hydraulic cylinder is connected to an external hydraulic drive system for operation, the end of the movable rod of the hydraulic cylinder is fixedly connected to a first movable plate, the first movable plate is driven up and down by the hydraulic cylinder to achieve mold closing and mold opening of the movable mold seat and the fixed mold seat;

[0008] The top of the first movable plate is provided with four first connecting columns arranged in a matrix, the tops of the four first connecting columns are commonly connected to a connecting plate, a film stripping assembly is provided on the connecting plate, the film stripping assembly includes an electric telescopic rod fixedly connected to the middle of the bottom of the connecting plate, the electric telescopic rod is connected to an external power supply for operation, a movable rod of the electric telescopic rod passes through the bottom of the connecting plate and is fixedly connected to a second movable plate, four ejector rods arranged in a matrix are provided on the top of the second movable plate, the second movable plate is driven to move up and down by the electric telescopic rod, so that the second movable plate drives the four ejector rods to move synchronously;

[0009] A second connecting column is provided at the top of the connecting plate and near the four corners, and the top ends of the four second connecting columns are commonly connected to a movable mold base, and the top ends of the four ejector rods penetrate the bottom of the movable mold base. When the ejector rods move upward, the cylindrical molded injection molded toy sleeved on the cylindrical mold core can be pushed upward to achieve the role of demolding;

[0010] A cylindrical mold core is provided in the middle of the top of the movable mold seat, a fixed mold seat is provided at the bottom of the top plate, a molding cavity is opened in the middle of the bottom of the fixed mold seat, and an injection port connected with the fixed mold seat is opened on the top of the top plate. When the movable mold seat and the fixed mold seat are molded together, the cylindrical mold core is located in the molding cavity to form a cylindrical cavity, and the injection material enters the molding cavity to form a cylindrical structure.

[0011] Preferably, the top ends of the four fixed upright poles all pass through the bottom of the first movable plate, and the first movable plate is slidably connected to the fixed upright poles, so that the first movable plate can move up and down stably.

[0012] Preferably, two second positioning rods which are arranged symmetrically on both sides are provided at the bottom of the second movable plate, and the bottom ends of the second positioning rods pass through the top of the connecting plate, which is conducive to the stable upward and downward movement of the second movable plate.

[0013] Preferably, four mounting holes arranged in a circular array are provided at the top of the movable mold base and close to the cylindrical mold core, and sealing sleeves are provided in the four mounting holes. The four ejector rods pass through the four sealing sleeves respectively to prevent the injection solution from leaking out from the connection between the ejector rod and the movable mold base.

[0014] Preferably, springs are sleeved on the outer sides of the four ejector rods, an anti-slip ring is provided at the bottom of the sealing sleeve, and the top of the spring abuts against the bottom of the anti-slip ring to improve the stability of the sealing sleeve.

[0015] Preferably, when the movable rod of the electric telescopic rod is fully retracted, the top of the ejector rod and the top of the movable mold base are located on the same plane, avoiding the ejector rod from causing a groove structure at the opening edge of the cylindrical plastic toy, thereby ensuring the production quality of the cylindrical plastic toys.

[0016] Preferably, a first positioning rod is provided at the top of the movable mold seat and near the four corners, and a positioning groove is provided at the bottom of the fixed mold seat and near the four corners. When the top of the movable mold seat is tightly fitted with the bottom of the fixed mold seat, the four first positioning rods are respectively inserted into the four positioning grooves to ensure the stability of the movable mold seat and the fixed mold seat after docking.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The cylindrical injection mold drives the first movable plate to move up and down by the hydraulic cylinder to achieve the mold closing and opening of the movable mold base and the fixed mold base, and drives the second movable plate to move up and down by the electric telescopic rod, so that the second movable plate drives the four ejector rods to move synchronously. When the ejector rod moves upward, the cylindrical injection molded toy sleeved on the cylindrical mold core can be pushed upward to achieve the role of demolding.

[0019] 2. The cylindrical injection mold has four mounting holes arranged in a circular array at the top of the movable mold base and close to the cylindrical mold core. The four mounting holes are each provided with a sealing sleeve, and the four ejector rods pass through the four sealing sleeves respectively to prevent the injection solution from leaking from the connection between the ejector rod and the movable mold base.

[0020] 3. For the cylindrical injection mold, when the movable rod of the electric telescopic rod is fully retracted, the top of the ejector rod and the top of the movable mold base are located on the same plane, so as to avoid the ejector rod causing a groove structure at the opening edge of the cylindrical plastic toy, thereby ensuring the production quality of the cylindrical plastic toy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall first state structure of the utility model;

[0022] Figure 2It is a schematic diagram of the overall second state structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the fixed die base structure in the utility model;

[0024] Figure 4 It is one of the partial structural schematic diagrams of the utility model;

[0025] Figure 5 This is the second schematic diagram of the partial structure of the utility model;

[0026] Figure 6 It is a schematic diagram of the structure of the movable mold base in the utility model;

[0027] Figure 7 It is a schematic diagram of the structure of the film stripping component in the utility model.

[0028] In the figure: 1, bottom plate; 2, fixed vertical rod; 3, top plate; 30, injection port; 4, hydraulic cylinder; 5, first movable plate; 50, first connecting column; 6, connecting plate; 60, second connecting column; 7, movable mold base; 70, cylindrical mold core; 71, first positioning rod; 72, mounting hole; 8, fixed mold base; 80, molding cavity; 81, positioning groove; 9, demolding assembly; 90, electric telescopic rod; 91, second movable plate; 92, ejector rod; 93, spring; 94, second positioning rod; 10, sealing sleeve. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] See also Figure 1-Figure 7 , the utility model provides a technical solution:

[0032] A cylindrical injection mold, comprising a bottom plate 1, a fixed vertical rod 2 is arranged at the top of the bottom plate 1 and near the four corners, the top ends of the four fixed vertical rods 2 are connected to a top plate 3, a hydraulic cylinder 4 is arranged in the middle of the top of the bottom plate 1, the hydraulic cylinder 4 is connected to an external hydraulic drive system for operation, and the end of the movable rod of the hydraulic cylinder 4 is fixedly connected to a first movable plate 5, and the first movable plate 5 is driven up and down by the hydraulic cylinder 4 to realize the mold closing and mold opening of the movable mold base 7 and the fixed mold base 8;

[0033] The top of the first movable plate 5 is provided with four first connecting columns 50 arranged in a matrix, and the top ends of the four first connecting columns 50 are commonly connected to a connecting plate 6, and a film stripping assembly 9 is provided on the connecting plate 6. The film stripping assembly 9 includes an electric telescopic rod 90 fixedly connected to the middle of the bottom of the connecting plate 6, and the electric telescopic rod 90 is externally connected to a power supply to work. The movable rod of the electric telescopic rod 90 passes through the bottom of the connecting plate 6 and is fixedly connected to a second movable plate 91. The top of the second movable plate 91 is provided with four ejector rods 92 arranged in a matrix, and the second movable plate 91 is driven to move up and down by the electric telescopic rod 90, so that the second movable plate 91 drives the four ejector rods 92 to move synchronously;

[0034] A second connecting column 60 is provided at the top of the connecting plate 6 and near the four corners. The top ends of the four second connecting columns 60 are connected to the movable mold base 7. The top ends of the four ejector rods 92 penetrate the bottom of the movable mold base 7. When the ejector rods 92 move upward, the cylindrical molded injection molded toy sleeved on the cylindrical mold core 70 can be pushed upward to achieve the demolding effect.

[0035] A cylindrical mold core 70 is provided in the middle of the top of the movable mold seat 7, and a fixed mold seat 8 is provided at the bottom of the top plate 3. Cooling structures are provided on the movable mold seat 7 and the fixed mold seat 8, which are prior arts and will not be described in detail here. A molding cavity 80 is provided in the middle of the bottom of the fixed mold seat 8, and an injection port 30 connected to the fixed mold seat 8 is provided on the top of the top plate 3. When the movable mold seat 7 and the fixed mold seat 8 are molded together, the cylindrical mold core 70 is located in the molding cavity 80 and forms a cylindrical cavity, and the injection material enters the molding cavity 80 to form a cylindrical structure.

[0036] In this embodiment, the top ends of the four fixed uprights 2 pass through the bottom of the first movable plate 5 , and the first movable plate 5 is slidably connected to the fixed uprights 2 , so that the first movable plate 5 can move stably up and down.

[0037] Specifically, two second positioning rods 94 symmetrically arranged at the bottom of the second movable plate 91 are provided, and the bottom ends of the second positioning rods 94 penetrate the top of the connecting plate 6, which is conducive to the stable upward and downward movement of the second movable plate 91.

[0038] Furthermore, four mounting holes 72 arranged in a circular array are provided at the top of the movable mold base 7 and close to the cylindrical mold core 70. Sealing sleeves 10 are provided in the four mounting holes 72. Four ejector rods 92 pass through the four sealing sleeves 10 respectively to prevent the injection solution from leaking out from the connection between the ejector rods 92 and the movable mold base 7.

[0039] Furthermore, springs 93 are sleeved on the outer sides of the four ejection rods 92 , and an anti-slip ring is provided at the bottom of the sealing sleeve 10 . The top of the spring 93 abuts against the bottom of the anti-slip ring, thereby improving the stability of the sealing sleeve 10 .

[0040] Furthermore, when the movable rod of the electric telescopic rod 90 is fully retracted, the top of the ejector rod 92 and the top of the movable mold base 7 are located on the same plane, avoiding the ejector rod 92 from causing a groove structure at the opening edge of the cylindrical plastic toy, thereby ensuring the production quality of the cylindrical plastic toy.

[0041] Furthermore, first positioning rods 71 ​​are provided at the top of the movable mold base 7 and near the four corners, and positioning grooves 81 are provided at the bottom of the fixed mold base 8 and near the four corners. When the top of the movable mold base 7 and the bottom of the fixed mold base 8 are tightly fitted, the four first positioning rods 71 ​​are respectively inserted into the four positioning grooves 81 to ensure the stability of the movable mold base 7 and the fixed mold base 8 after docking.

[0042] When the cylindrical injection mold of this embodiment is in use, the movable rod of the hydraulic cylinder 4 extends to drive the first movable plate 5 to move upward, and the first movable plate 5 drives the connecting plate 6 and the movable mold seat 7 to move upward synchronously until the top of the movable mold seat 7 is tightly fitted with the bottom of the fixed mold seat 8. At this time, the four first positioning rods 71 ​​are respectively inserted into the four positioning grooves 81 to ensure the stability of the movable mold seat 7 and the fixed mold seat 8 after docking. The cylindrical mold core 70 is located in the molding cavity 80 and forms a cylindrical cavity. Then the injection molding equipment squeezes the injection molding solution into the injection port 30, and the injection molding solution enters the molding cavity 8. 0 forms a cylindrical structure. When the cylindrical plastic toy is cooled and formed, the movable rod of the hydraulic cylinder 4 contracts, driving the first movable plate 5 to reset downward, so that the movable mold base 7 is separated from the fixed mold base 8, and the formed cylindrical plastic toy moves downward with the cylindrical mold core 70. During the contraction of the movable rod of the hydraulic cylinder 4, the movable rod of the electric telescopic rod 90 extends, driving the second movable plate 91 to move upward, so that the second movable plate 91 drives the four ejector rods 92 to move upward synchronously, and the cylindrical molded injection molded toy sleeved on the cylindrical mold core 70 is pushed upward to achieve the role of demolding.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A cylindrical injection mold, comprising a bottom plate (1), wherein fixed vertical rods (2) are arranged at the top of the bottom plate (1) and near the four corners, and the top ends of the four fixed vertical rods (2) are connected to a top plate (3), characterized in that: A hydraulic cylinder (4) is provided in the middle of the top of the base plate (1), the end of the movable rod of the hydraulic cylinder (4) is fixedly connected to a first movable plate (5), the top of the first movable plate (5) is provided with four first connecting columns (50) arranged in a matrix, the top ends of the four first connecting columns (50) are commonly connected to a connecting plate (6), a film stripping assembly (9) is provided on the connecting plate (6), the film stripping assembly (9) comprises an electric telescopic rod (90) fixedly connected to the middle of the bottom of the connecting plate (6), the movable rod of the electric telescopic rod (90) passes through the bottom of the connecting plate (6) and is fixedly connected to a second movable plate (91), the second movable plate (92) is provided with a plurality of first connecting columns (50) arranged in a matrix, the top ends of the four first connecting columns (50) are commonly connected to a connecting plate (6), a film stripping assembly (9) is provided on the connecting plate (6), the film stripping assembly (9) comprises an electric telescopic rod (90) fixedly connected to the middle of the bottom of the connecting plate (6), the movable rod of the electric telescopic rod (90) passes through the bottom of the connecting plate (6) and is fixedly connected to a second movable plate (91), The top of the plate (91) is provided with four ejector rods (92) arranged in a matrix, the top of the connecting plate (6) and near the four corners are provided with second connecting columns (60), the top ends of the four second connecting columns (60) are commonly connected to a movable mold base (7), the top ends of the four ejector rods (92) pass through the bottom of the movable mold base (7), a cylindrical mold core (70) is provided in the middle of the top of the movable mold base (7), the bottom of the top plate (3) is provided with a fixed mold base (8), the middle of the bottom of the fixed mold base (8) is provided with a molding cavity (80), and the top of the top plate (3) is provided with an injection port (30) connected to the fixed mold base (8).

2. The cylindrical injection mold according to claim 1, characterized in that: The top ends of the four fixed upright poles (2) all pass through the bottom of the first movable plate (5), and the first movable plate (5) is slidably connected to the fixed upright poles (2).

3. The cylindrical injection mold according to claim 1, characterized in that: Two second positioning rods (94) are arranged symmetrically at the bottom of the second movable plate (91), and the bottom ends of the second positioning rods (94) penetrate the top of the connecting plate (6).

4. The cylindrical injection mold according to claim 1, characterized in that: Four mounting holes (72) arranged in a circular array are provided at the top of the movable mold base (7) and close to the cylindrical mold core (70). A sealing sleeve (10) is provided in each of the four mounting holes (72), and the four ejector rods (92) pass through the four sealing sleeves (10) respectively.

5. The cylindrical injection mold according to claim 4, characterized in that: The outer sides of the four ejection rods (92) are all sleeved with springs (93), the bottom of the sealing sleeve (10) is provided with an anti-slip ring, and the top of the spring (93) abuts against the bottom of the anti-slip ring.

6. The cylindrical injection mold according to claim 1, characterized in that: When the movable rod of the electric telescopic rod (90) is fully retracted, the top of the ejector rod (92) and the top of the movable mold base (7) are located on the same plane.

7. The cylindrical injection mold according to claim 1, characterized in that: First positioning rods (71) are provided at the top of the movable mold base (7) and near the four corners, and positioning grooves (81) are provided at the bottom of the fixed mold base (8) and near the four corners. When the top of the movable mold base (7) and the bottom of the fixed mold base (8) are tightly fitted, the four first positioning rods (71) are respectively inserted into the four positioning grooves (81).

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