Injection mold convenient to demold

Abstract

The injection mold comprises an upper mold body, a lower mold body, an electric push rod and a driving motor, the bottom of the lower mold body is fixedly connected with a supporting frame, the upper top end of the electric push rod is fixedly connected with a demolding column, and the side wall of the upper end of the lower mold body is fixedly connected with a mounting plate; an L-shaped rotating rod is fixedly installed on a transmission shaft part at the upper top end of the driving motor, a sliding groove rod is movably connected to the outer curved surface of the side top end of the L-shaped rotating rod in an attached mode, a supporting ring is fixedly connected to the upper side of the outer top end of the sliding groove rod, and an air spraying nozzle is fixedly connected to the inner wall of the supporting ring; four upper mounting holes are formed in the four corners of the upper top end of the upper die body in a penetrating mode and are symmetrically distributed around the four corners of the upper top end of the upper die body, and the upper end face of the lower die body is embedded in the upper end face of the upper die body. According to the injection mold, injection molding of the mold is realized, and meanwhile, injection-molded plastic can be conveniently demolded.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold which is easy to demould. Background Art

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products complete structures and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product. Although the structure of the mold may vary due to the type and performance of the plastic, the shape and structure of the plastic product, and the type of injection molding machine, the basic structure is the same. The mold is mainly composed of a pouring system, a temperature control system, molding parts, and structural parts. Among them, the pouring system and molding parts are the parts that are in direct contact with the plastic, and they change with the plastic and the product. They are the most complex and most variable parts of the mold, and require the highest processing finish and precision.

[0003] However, when the prior art is actually used, during the production process of plastic products using injection molds, after the injection molding of the plastic products is completed, the cooled and solidified plastic products need to be demolded. Usually, when demolding the plastic products, a clamp is used to clamp the solidified plastic products and take them out of the mold cavity, which makes it inconvenient to demold the plastic products. At the same time, it is easy for the plastic mold to be unevenly clamped, resulting in incomplete demolding. Utility Model Content

[0004] The purpose of the utility model is to provide an injection mold that is easy to demold, so as to solve the problem raised in the above background technology that in the process of using injection molds to produce plastic products, after the plastic products are injected, the plastic products that have been cooled and solidified need to be demolded. Usually, when demolding the plastic products, a clamp is used to clamp the solidified plastic products and take them out of the mold cavity, which makes it inconvenient to demold the plastic products. At the same time, it is easy to have uneven clamping force on the plastic mold, resulting in incomplete demolding.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including an upper mold body, a lower mold body, an electric push rod and a driving motor, the bottom of the lower mold body is fixedly connected to a support frame, the upper top of the electric push rod is fixedly connected to a demolding column, the upper side wall of the lower mold body is fixedly connected to a mounting plate, the upper top transmission shaft part of the driving motor is fixedly installed with an L-shaped rotating rod, the outer curved surface of the top side of the L-shaped rotating rod is movably connected to a slide rod, the upper side of the outer top of the slide rod is fixedly connected to a support ring, and the inner wall of the support ring is fixedly connected to a jet nozzle.

[0006] Preferably, upper mounting holes are penetrated through four corners at the top end of the upper die body, and the number of the upper mounting holes is four, which are symmetrically distributed at four corners at the top end of the upper die body respectively.

[0007] Preferably, the upper end surface of the lower die body is fitted into the lower end surface of the upper die body, so that a mold cavity is formed between the middle part of the upper end of the lower die body and the middle part of the lower end surface of the upper die body. An injection hole is opened in the middle part of the upper end surface of the upper die body, so that molten plastic is injected into the mold cavity between the middle part of the upper end of the lower die body and the middle part of the lower end surface of the upper die body through the injection hole.

[0008] Preferably, a cooling pipe is inlaid and fixedly connected in the middle part of the upper die body, and the inlet part of the side end of the cooling pipe penetrates through the side wall of the middle part of the upper die body, so that the cooling pipe is connected with an external cooling water pipeline.

[0009] Preferably, lower mounting holes are penetrated through four corners at the bottom end of the support frame, and the number of the lower mounting holes is four, which are symmetrically distributed at four corners at the bottom end of the support frame respectively. The electric push rod is fixedly connected to the inner bottom of the support frame.

[0010] Preferably, the demolding column penetrates upward to the bottom of the mold cavity formed between the middle part of the upper end of the lower die body and the middle part of the lower end surface of the upper die body. A limiting ring is fixedly connected to the outer curved surface of the middle part of the demolding column. A spring is fixedly connected to the circumferential surface of the upper end of the limiting ring, and the upper end of the spring is fixedly connected to the inner top of the lower die body.

[0011] Preferably, the driving motor is bolt-mounted on the side top end of the lower end surface of the mounting plate, and the transmission shaft part at the top end of the driving motor penetrates to the side top end of the upper end surface of the mounting plate.

[0012] Preferably, the top end of the sliding chute rod on the side far away from the L-shaped rotating rod is rotationally connected to the middle part of the upper end surface of the mounting plate through a pin shaft. The air jet nozzle is connected with an external air pump through a connecting hose.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] When the plastic inside the mold cavity needs to be demolded after cooling and forming, the upper mold body is driven by the stamping part of the mold press to move upward for the mold opening action. When the upper mold body moves upward for the mold opening action, the electric push rod is opened to push upward. When the electric push rod pushes upward, it will push the demolding column upward. When the demolding column moves upward, the formed plastic inside the mold cavity can be pushed upward to be demolded. A limiting ring is welded to the outer surface of the middle part of the demolding column, and a spring is adhered to the peripheral surface of the upper end of the limiting ring, and the upper end of the spring is adhered to the inner top of the lower mold body. When the demolding column moves upward, the limiting ring will be driven to move upward. When the limiting ring moves upward, the compression spring will be pushed. When the spring is pushed and compressed, it will push the limiting ring downward in the opposite direction due to the elastic potential energy generated by its own compression deformation. Therefore, by compressing the spring, it can play a buffering role in the upward movement of the demolding column, avoiding the problem of damage to the formed plastic caused by the too fast movement of the demolding column when moving upward for demolding;

[0015] When the driving motor rotates, the L-shaped rotating rod will be driven to rotate. When the L-shaped rotating rod rotates, the sliding groove rod will be pushed to swing. A support ring is welded to the upper side of the outer end of the sliding groove rod, and a jet nozzle is adhered to the inner wall of the support ring. The jet nozzle is connected to an external air pump through a connecting hose. When the sliding groove rod swings, the jet nozzle will be driven to swing and jet in sequence. When the jet nozzle swings and jets, the formed plastic that moves upward and is demolded inside the mold cavity will be jetted out by the swinging jet nozzle, thus realizing the function of facilitating the demolding of the plastic during injection molding while the mold is injection molding. Description of the Drawings

[0016] Figure 1 Schematic diagram of the overall structure of an injection mold for facilitating demolding according to the present utility model Figure 1 ;

[0017] Figure 2 Schematic diagram of the overall structure of an injection mold for facilitating demolding according to the present utility model Figure 2 ;

[0018] Figure 3 Schematic diagram of the partial structure of an injection mold for facilitating demolding according to the present utility model.

[0019] In the figure: 1. Upper mold body; 2. Lower mold body; 3. Electric push rod; 4. Driving motor; 5. Upper mounting hole; 6. Injection hole; 7. Cooling pipe; 8. Support frame; 9. Lower mounting hole; 10. Limiting ring; 11. Spring; 12. Mounting plate; 13. L-shaped rotating rod; 14. Sliding groove rod; 15. Support ring; 16. Jet nozzle; 17. Demolding column. Detailed Embodiment

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0021] Please refer to Figures 1-3 , the present utility model provides a technical solution: including an upper die body 1, a lower die body 2, an electric push rod 3 and a driving motor 4;

[0022] Upper mounting holes 5 are penetrated and opened at the four corners of the upper end of the upper die body 1, and the number of the upper mounting holes 5 is four, which are symmetrically distributed at the four corners of the upper end of the upper die body 1 respectively, so that the upper die body 1 is bolted to the stamping part of the die stamping machine through the upper mounting holes 5, and the upper die body 1 is driven by the stamping part of the die stamping machine to move up and down linearly to perform the die opening and closing actions. The upper end surface of the lower die body 2 is fitted into the lower end surface of the upper die body 1, so that a die cavity is formed between the middle part of the upper end of the lower die body 2 and the middle part of the lower end surface of the upper die body 1. An injection hole 6 is opened in the middle part of the upper end surface of the upper die body 1, so that the melted plastic is injected into the die cavity between the middle part of the upper end of the lower die body 2 and the middle part of the lower end surface of the upper die body 1 through the injection hole 6. A cooling pipe 7 is inlaid and bonded in the middle of the upper die body 1, and the inlet part of the side end of the cooling pipe 7 penetrates through the side wall of the middle part of the upper die body 1, so that the cooling pipe 7 is connected to the external cooling water pipeline, and thus the melted plastic in the die cavity is cooled and formed through the cooling pipe 7, thereby realizing the function of die injection molding;

[0023] A support frame 8 is welded to the bottom of the lower die body 2. Four lower mounting holes 9 are penetrated through the four corners of the lower end of the support frame 8, and the number of the lower mounting holes 9 is four, which are symmetrically distributed at the four corners of the lower end of the support frame 8, so that the support frame 8 is bolted and fixed through the lower mounting holes 9. The electric push rod 3 is bolted to the inner bottom of the support frame 8. A demolding column 17 is bonded to the upper end of the electric push rod 3, and the demolding column 17 penetrates upward to the bottom of the mold cavity formed between the middle of the upper end of the lower die body 2 and the middle of the lower end face of the upper die body 1. When the plastic in the mold cavity needs to be demolded after cooling and forming, the upper die body 1 is driven to move upward by the stamping part of the mold press to perform the mold opening action. When the upper die body 1 moves upward to perform the mold opening action, the electric push rod 3 is turned on to push upward. When the electric push rod 3 pushes upward, the demolding column 17 will be pushed upward. When the demolding column 17 moves upward, the formed plastic in the mold cavity can be pushed upward to be demolded. A limiting ring 10 is welded to the outer curved surface of the middle part of the demolding column 17. A spring 11 is bonded to the peripheral surface of the upper end of the limiting ring 10, and the upper end of the spring 11 is bonded to the inner top of the lower die body 2. When the demolding column 17 moves upward, the limiting ring 10 will be driven to move upward. When the limiting ring 10 moves upward, the compression spring 11 will be pushed. When the spring 11 is pushed and compressed, the elastic potential energy generated by its own compression deformation will push the limiting ring 10 downward in the reverse direction. Therefore, the compression spring 11 can play a buffering role in the upward movement of the demolding column 17, avoiding the problem of damage to the formed plastic caused by the too fast movement of the demolding column 17 when moving upward for demolding;

[0024] An installation plate 12 is welded to the side wall of the upper end of the lower die body 2. The driving motor 4 is bolted to the top side of the lower end face of the installation plate 12, and the transmission shaft part of the upper end of the driving motor 4 penetrates through to the top side of the upper end face of the installation plate 12. An L-shaped rotating rod 13 is fixedly installed on the transmission shaft part of the upper end of the driving motor 4. The outer curved surface of the top side of the L-shaped rotating rod 13 is in fitting and movable connection with a chute rod 14. The top side of the chute rod 14 away from the L-shaped rotating rod 13 is rotationally connected to the middle of the upper end face of the installation plate 12 through a pin shaft. When the driving motor 4 rotates, the L-shaped rotating rod 13 will be driven to rotate. When the L-shaped rotating rod 13 rotates, the chute rod 14 will be pushed to swing. A support ring 15 is welded to the upper side of the outer top end of the chute rod 14, and an air jet nozzle 16 is bonded to the inner wall of the support ring 15, and the air jet nozzle 16 is connected to an external air pump through a connecting hose. When the chute rod 14 swings, the air jet nozzle 16 will be driven to swing and jet in sequence. When the air jet nozzle 16 swings and jets, the formed plastic moving upward and demolding in the mold cavity will be jetted out by the swinging and jetting air jet nozzle 16, thus realizing the function of facilitating the demolding of the injection-molded plastic while the mold is injection-molded.

[0025] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0026] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An injection mold facilitating demolding, comprising an upper mold body (1) and a lower mold body (2), characterized in that: It includes an electric push rod (3) and a driving motor (4). A support frame (8) is fixedly connected to the bottom of the lower die body (2). The upper end of the electric push rod (3) is fixedly connected to a demolding column (17). An installation plate (12) is fixedly connected to the side wall of the upper end of the lower die body (2). A L-shaped rotating rod (13) is fixedly installed on the driving shaft part of the upper end of the driving motor (4). The outer curved surface of the side top end of the L-shaped rotating rod (13) is fitted and movably connected to a chute rod (14). A support ring (15) is fixedly connected to the upper side of the outer top end of the chute rod (14). A jet nozzle (16) is fixedly connected to the inner wall of the support ring (15).

2. The injection mold facilitating demolding according to claim 1, wherein: Upper mounting holes (5) are penetrated and opened at the four corners of the upper end of the upper die body (1), and the number of the upper mounting holes (5) is four, which are symmetrically distributed at the four corners of the upper end of the upper die body (1).

3. The injection mold for easy demolding according to claim 2, wherein: The upper end surface of the lower die body (2) is fitted into the lower end surface of the upper die body (1), so that a mold cavity is formed between the middle part of the upper end of the lower die body (2) and the middle part of the lower end surface of the upper die body (1). An injection hole (6) is opened in the middle part of the upper end surface of the upper die body (1), so that molten plastic is injected into the mold cavity between the middle part of the upper end of the lower die body (2) and the middle part of the lower end surface of the upper die body (1) through the injection hole (6).

4. The injection mold for facilitating demolding according to claim 3, characterized in that: A cooling pipe (7) is inlaid and fixedly connected to the middle part of the upper die body (1), and the inlet part of the side end of the cooling pipe (7) penetrates to the side wall of the middle part of the upper die body (1), so that the cooling pipe (7) is connected to an external cooling water pipeline.

5. The injection mold facilitating demolding according to claim 4, characterized in that: Lower mounting holes (9) are penetrated and opened at the four corners of the lower bottom end of the support frame (8), and the number of the lower mounting holes (9) is four, which are symmetrically distributed at the four corners of the lower bottom end of the support frame (8). The electric push rod (3) is fixedly connected to the inner bottom of the support frame (8).

6. The injection mold facilitating demolding according to claim 5, characterized in that: The demolding column (17) penetrates upward to the bottom of the mold cavity formed between the middle part of the upper end of the lower die body (2) and the middle part of the lower end surface of the upper die body (1). A limiting ring (10) is fixedly connected to the outer curved surface of the middle part of the demolding column (17). A spring (11) is fixedly connected to the circumferential surface of the upper end of the limiting ring (10), and the upper end of the spring (11) is fixedly connected to the inner top of the lower die body (2).

7. An injection mold facilitating demolding according to claim 6, characterized in that: The driving motor (4) is bolt-mounted and connected to the side top end of the lower end surface of the installation plate (12), and the driving shaft part of the upper end of the driving motor (4) penetrates to the side top end of the upper end surface of the installation plate (12).

8. The injection mold facilitating demolding according to claim 7, wherein: One side top end of the chute rod (14) far from the L-shaped rotating rod (13) is rotatably connected to the middle part of the upper end surface of the installation plate (12) through a pin shaft. The jet nozzle (16) is connected to an external air pump through a connecting hose.

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