Plastic injection mold capable of self-demolding
By designing self-demolding injection molds, the automatic demolding mechanism is used to achieve simultaneous demolding and cleaning of the mold cavity with upper and lower molds, the problems of low efficiency and poor demolding of existing injection molds are solved, and production efficiency and product quality are improved.
Patent Information
- Application Number
- CN202420414253.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-05
AI Technical Summary
Existing injection molds are not efficient when the workpiece is separated and the mold release mechanism cannot clean the mold cavity, resulting in the product that may be deformed or damaged.
A plastic injection mold that can be self-demolded is designed, adopting a structure of mold release at the same time by upper and lower dies. Automatic mold release is achieved through mechanisms such as lifting slide rods, reset top rods, extrusion springs and return springs to ensure smooth rolling of molded parts and Clean the mold cavity.
Improve production efficiency, avoid product deformation or damage caused by poor mold release, simplify the operator's workflow, and reduce the injection molding cycle.
Smart Images
Figure CN222178535U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to a self-demolding plastic injection mold. Background Art
[0002] Injection molding in home appliance processing refers to the use of injection molding technology to manufacture home appliance parts or shells. Injection molding is a common plastic processing method, suitable for the production of plastic parts of various sizes and shapes. The injection molding process is that plastic particles are fed into the feed port of the injection molding machine, the particles are melted into a molten state through a heating cylinder, the molten plastic is injected into the mold, cooled in the mold, the plastic becomes solid, the mold is opened, and the workpiece is taken out. When the workpiece is separated, the existing injection mold mostly ejects the workpiece in one direction through an ejector pin. Some molds require external force to achieve demolding, which is not efficient and the demolding mechanism cannot clean the mold cavity. Utility Model Content
[0003] The purpose of the utility model is to provide a plastic injection mold capable of self-demolding to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a self-demolding plastic injection mold, comprising:
[0005] An upper mold with a mold cavity at the bottom;
[0006] A top plate, the top plate is slidably arranged inside the mold cavity, a lifting slide rod is fixedly connected to the top of the top plate, a lifting plate for driving the top plate to lift is fixedly connected to the top of the lifting slide rod, a reset ejector rod for driving the top plate to reset is fixedly connected to the bottom of the lifting plate, and an extrusion spring for driving the top plate to demould is arranged on the top of the lifting plate;
[0007] A lower mold, the lower mold is placed below the upper mold, a mold core is fixedly connected to the top of the lower mold, a demoulding ejector rod is slidably provided in the middle of the mold core, a lifting and resetting plate is fixedly connected to the bottom of the demoulding ejector rod, and a reset spring for driving the demoulding ejector rod to demould is provided at the bottom of the lifting and resetting plate;
[0008] Positioning rods are placed at the four corners of the bottom of the upper mold and are used to drive the demoulding ejector rod to reset.
[0009] Preferably, a fixed support plate of an inverted L-shaped structure is fixedly connected to the top of the upper mold, a lifting limit groove is opened in the middle of the fixed support plate, and the lifting plate passes through the middle of the lifting limit groove and is slidably connected to the lifting limit groove.
[0010] Preferably, a fixed limiting rod is fixedly connected to one side of the fixed support plate, and the extrusion spring is sleeved on the outside of the fixed limiting rod and is located between the fixed support plate and the lifting plate.
[0011] Preferably, the reset ejector rod passes through the bottom of the upper die, and the reset ejector rod is slidably connected to the upper die.
[0012] Preferably, a sliding cavity is opened in the middle of the lower mold, the lifting and resetting plate is slidably arranged inside the sliding cavity, the interior of the sliding cavity is fixedly connected to a limiting sliding rod, and the resetting spring is sleeved on the outside of the limiting sliding rod.
[0013] Preferably, a limiting sliding groove is provided between the positioning hole and the sliding cavity, one end of the lifting and resetting plate is fixedly connected with a resetting slide plate, and the resetting slide plate passes through the limiting sliding groove and extends into the positioning hole.
[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: when the mold is separated, the two demoulding mechanisms lose their restraints, and can smoothly push the molded parts out of the mold, avoiding deformation or damage of the product caused by poor demoulding. Due to the automated operation of the demoulding mechanism, the operator's work in removing the molded parts becomes more convenient. The simultaneous demoulding of the upper and lower molds means that after the mold is opened, the molded parts can enter the next stage faster, and the whole process is smoother, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the utility model;
[0016] Figure 2 It is a structural schematic diagram of the upper mold of the utility model;
[0017] Figure 3 This is a schematic diagram of the position structure of the top plate of the utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the lower mold of the utility model;
[0019] Figure 5 It is a structural schematic diagram of the reset slide plate of the utility model.
[0020] In the figure: 1. upper mold; 2. lower mold; 3. fixed support plate; 4. lifting plate; 5. lifting slide bar; 6. lifting limit groove; 7. reset ejector rod; 8. extrusion spring; 9. mold cavity; 10. ejector plate; 11. positioning rod; 12. positioning hole; 13. mold core; 14. sliding cavity; 15. lifting and reset plate; 16. limit slide groove; 17. reset spring; 18. demoulding ejector rod; 19. fixed limit rod; 20. reset slide plate; 21. limit slide bar. DETAILED DESCRIPTION
[0021] 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.
[0022] See also Figure 1-5 The utility model provides a technical solution: a self-demolding plastic injection mold, comprising: an upper mold 1 with a mold cavity 9 at the bottom; a top plate 10 is slidably arranged in the mold cavity 9, a lifting slide bar 5 is fixedly connected to the top of the top plate 10, the lifting slide bar 5 and the upper mold 1 slide up and down inside, a lifting plate 4 for driving the top plate 10 to lift and lower is fixedly connected to the top of the lifting slide bar 5, a reset push rod 7 for driving the top plate 10 to reset is fixedly connected to the bottom of the lifting plate 4, and an extrusion spring 8 for driving the top plate 10 to demould is arranged on the top of the lifting plate 4; a lower mold 2 is placed below the upper mold 1, a mold core 13 is fixedly connected to the top of the lower mold 2, a demoulding push rod 18 is slidably arranged in the middle of the mold core 13, a lifting and resetting plate 15 is fixedly connected to the bottom of the demoulding push rod 18, and a reset spring 17 for driving the demoulding push rod 18 to demould is arranged at the bottom of the lifting and resetting plate 15; a positioning rod 11 is fixedly connected to the four corners of the bottom of the upper mold 1, and is used to drive the demoulding push rod 18 to reset.
[0023] It should be noted that, in the present invention, when the upper mold 1 and the lower mold 2 are molded together, the positioning rod 11 is inserted into the positioning hole 12 to press the lifting and resetting plate 15 downward through the resetting slide plate 20, so that the demoulding ejector rod 18 is flush with the top of the mold core 13, and the resetting ejector rod 7 moves upward under the extrusion of the lower mold 2, and the resetting ejector rod 7 drives the lifting slide rod 5 through the lifting plate 4, and the ejector plate 10 is reset to the top of the mold cavity 9 through the lifting slide rod 5, so that the mold cavity 9 cooperates with the sliding cavity 14 to form a complete injection cavity; when the upper mold 1 and the lower mold 2 are separated, the extrusion thrust of the extrusion spring 8 The lifting plate 4 pushes the lifting slide bar 5 downward so that the top plate 10 is located at the bottom of the mold cavity, and the mold cavity is cleaned while demoulding. Under the action of the reset spring 17, the lifting reset plate 15 pushes the demoulding ejector rod 18 out of the top of the mold core 13, so as to realize automatic demoulding when the upper and lower molds are separated. When the mold is separated, the two demoulding mechanisms lose their restraints, and they can smoothly push the molded parts out of the mold, which helps to avoid product deformation or damage caused by poor demoulding. Due to the automated operation of the demoulding mechanism, the operator's work becomes more convenient when taking out the molded parts. The whole process is smoother and the production efficiency is improved. The automated demoulding mechanism can reduce the injection cycle and improve production efficiency.
[0024] like Figure 2 , 3As shown, a fixed support plate 3 of an inverted L-shaped structure is installed on the top of the upper mold 1 by bolts, a lifting limit groove 6 is opened in the middle of the fixed support plate 3, the lifting plate 4 passes through the middle of the lifting limit groove 6 and is slidably connected with the lifting limit groove 6, a fixed limit rod 19 is welded on one side of the fixed support plate 3, the extrusion spring 8 is sleeved on the outside of the fixed limit rod 19 and is located between the fixed support plate 3 and the lifting plate 4, the reset push rod 7 passes through the bottom of the upper mold 1, and the reset push rod 7 is slidably connected to the upper mold 1.
[0025] It should be noted that, according to the utility model, when the reset push rod 7 contacts the lower mold 2, under the extrusion action, the reset push rod 7 is compressed and moves toward the inside of the upper mold 1, and the reset push rod 7 pushes the lifting plate 4 upward along the lifting limit groove 6. The reset push rod 7 pulls the top plate 10 upward through the lifting slide bar 5 while squeezing the extrusion spring 8. When the upper mold 1 and the lower mold 2 are in contact, the top plate 10 is located at the top of the mold cavity 9. When the upper mold 1 and the lower mold 2 are separated, under the push of the extrusion spring 8, the lifting plate 4 pushes out the product at the bottom of the top plate 10 through the lifting slide bar 5.
[0026] like Figure 4 , 5 As shown, a sliding cavity 14 is opened in the middle of the lower mold 2, and a lifting and resetting plate 15 is slidably arranged inside the sliding cavity 14. A limiting slide rod 21 is fixedly connected to the inside of the sliding cavity 14, and a reset spring 17 is sleeved on the outside of the limiting slide rod 21. A limiting slide groove 16 is opened between the positioning hole 12 and the sliding cavity 14, and a reset slide plate 20 is fixedly connected to one end of the lifting and resetting plate 15. The reset slide plate 20 passes through the limiting slide groove 16 and extends to the positioning hole 12.
[0027] It should be noted that, when the upper mold 1 and the lower mold 2 of the utility model are closed, the positioning rod 11 is inserted into the positioning hole 12, so that the upper mold 1 and the lower mold 2 are closed and positioned, and at the same time, the lifting and reset plate 15 is squeezed and slid toward the bottom of the sliding cavity 14 by squeezing the reset slide plate 20 in the positioning hole 12. The lifting and reset plate 15 moves downward and compresses the reset spring 17. When the lifting and reset plate 15 moves to the extreme position, the top of the demolding ejector rod 18 is flush with the top of the mold core 13, so that it does not affect the injection molding work.
[0028] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" 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 device or element referred to 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.
[0029] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.
[0030] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A self-demolding plastic injection mold, Features: include: Positioning holes (12): An upper mold (1) having a mold cavity (9) at the bottom; A top plate (10), the top plate (10) is slidably arranged inside the mold cavity (9) and is used for demoulding and cleaning the mold cavity (9); a lifting slide bar (5) is fixedly connected to the top of the top plate (10); a lifting plate (4) for driving the top plate (10) to lift and lower is fixedly connected to the top of the lifting slide bar (5); a reset push rod (7) for driving the top plate (10) to reset is fixedly connected to the bottom of the lifting plate (4); an extrusion spring (8) for driving the top plate (10) to demould is provided at the top of the lifting plate (4); A lower mold (2), the lower mold (2) is placed below the upper mold (1), a mold core (13) is fixedly connected to the top of the lower mold (2), a demoulding ejector rod (18) is slidably provided in the middle of the mold core (13), a lifting and resetting plate (15) is fixedly connected to the bottom of the demoulding ejector rod (18), and a resetting spring (17) for driving the demoulding ejector rod (18) to demould is provided at the bottom of the lifting and resetting plate (15); Positioning rods (11), which are placed at the four corners of the bottom of the upper mold (1) and are used to drive the demoulding ejector rod (18) to reset.
2. A self-demolding plastic injection mold according to claim 1, Features: A fixed support plate (3) of an inverted L-shaped structure is fixedly connected to the top of the upper mold (1), a lifting limit groove (6) is provided in the middle of the fixed support plate (3), and the lifting plate (4) passes through the middle of the lifting limit groove (6) and is slidably connected to the lifting limit groove (6).
3. A self-demolding plastic injection mold according to claim 2, Features: A fixed limiting rod (19) is fixedly connected to one side of the fixed support plate (3), and the extrusion spring (8) is sleeved on the outside of the fixed limiting rod (19) and is located between the fixed support plate (3) and the lifting plate (4).
4. A self-demolding plastic injection mold according to claim 1, Features: The reset push rod (7) passes through the bottom of the upper mold (1), and the reset push rod (7) is slidably connected to the upper mold (1).
5. A self-demolding plastic injection mold according to claim 1, Features: A sliding cavity (14) is provided in the middle of the lower mold (2), the lifting and resetting plate (15) is slidably arranged inside the sliding cavity (14), the interior of the sliding cavity (14) is fixedly connected to a limiting sliding rod (21), and the resetting spring (17) is sleeved on the outside of the limiting sliding rod (21).
6. A self-demolding plastic injection mold according to claim 5, Features: A limiting sliding groove (16) is provided between the positioning hole (12) and the sliding cavity (14); one end of the lifting and resetting plate (15) is fixedly connected with a resetting slide plate (20); the resetting slide plate (20) penetrates the limiting sliding groove (16) and extends into the positioning hole (12).