Plastic toy mold convenient to demold

Abstract

The utility model relates to the technical field of plastic toys, in particular to a plastic toy mould convenient to demould, which comprises a base, four upright posts are arranged above the base, the upright posts are correspondingly distributed along the vertex angle positions of the upper end surface of the base, and the lower ends of the upright posts are fixedly assembled with the surface of the base through screws. When demolding is needed, a threaded knob is rotated to be separated from a threaded ring and a threaded groove in a threaded mode, the lower mold can move relative to the base, then a power source of a motor is switched on, the motor can drive a rotating shaft, and therefore the rotating shaft can drive an eccentric wheel to rotate, and the far end and the near end of the eccentric wheel continuously make contact with an extrusion plate; and through the compression reset effect of the first spring, the knocking block can continuously knock the lower mold at a high speed, so that the lower mold generates a vibration effect, and the separation demolding work of a plastic forming part and the lower mold can be improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic toy technology, and in particular to a mold for plastic toys that is easy to demold. Background Technology

[0002] Plastic toys are popular worldwide due to their many advantages. Plastic materials are generally lighter than metal or wood, making plastic toys easy to carry and handle, especially suitable for children. High-quality plastics have good impact resistance and wear resistance, allowing toys to remain intact during long-term use.

[0003] Plastic toys come in a wide variety, including building blocks, vehicle models, dolls, and animal shapes, catering to children of different ages and interests. For example, Chinese Patent Publication No. CN218748811U discloses a plastic toy production mold. The key technical points are: a plastic toy production mold includes a base, a hydraulic cylinder, an upper mold base, a lower mold base, an upper support, and columns. The upper mold base has an upper template and an upper module, and the lower mold base has a lower template and a lower module. Positioning holes are provided on both sides of the lower template, and placement cavities are provided on both sides of the upper template. A first compression spring is placed within each placement cavity, and an upper top plate and a lower top plate are respectively located at both ends of the first compression spring. Positioning columns that mate with the positioning holes are fixedly connected to the lower top plate. This invention, by providing a positioning and buffering component between the upper and lower templates, and by providing positioning and buffering components on the upper and lower mold bases, can prevent the upper and lower modules from colliding or shifting during the molding process, thus preventing interference with the use of the upper and lower templates.

[0004] Currently, plastic toys are mainly produced through injection molding. After injection molding and cooling, they need to be demolded. Most demolding methods involve adding ejector pin structures inside the mold. If the mold depth is large and the contact area between the plastic molded part and the inner cavity of the mold is large, then a single ejector pin structure is not only difficult to eject the molded part, but it is also easy to cause damage due to excessive local lifting force on the molded part. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a mold for plastic toys that facilitates demolding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a mold for easy demolding of plastic toys, including a base, four columns are provided on the top of the base and are distributed at the top corner of the upper end of the base. The lower end of the columns is fixed to the surface of the base by screws. The upper end of the four columns is connected to the same top plate. A cylinder is installed through the inside of the top plate. The connection between the cylinder and the top plate is fixed by screws. The cylinders are symmetrically distributed on both sides of the top plate. The cylinders are provided with piston rods for extension and retraction. A through hole is provided between two cylinders and extends through the middle of the top plate.

[0008] The piston rod end of the cylinder is fixed with an upper mold. The lower end of the upper mold has an internal groove. An injection interface is set inside the internal groove. The injection interface is connected to the upper mold. The connection position between the injection interface and the upper mold is welded and fixed. The injection interface is set to correspond with the through hole.

[0009] A lower mold is also provided above the base. The lower mold is slidably attached to the base. The lower mold has a mold cavity inside. The position of the lower mold corresponds to and fits the position of the upper mold.

[0010] In detail, a bushing is provided on the upper side of the base, and the outer ring wall of the bushing is fixed to the surface of the base by a bracket. A shaft is slidably connected inside the bushing.

[0011] In detail, a striking block is provided at the end of the shaft near the lower mold, and the striking block is welded and fixed to the end of the shaft. An extrusion plate is provided at the end of the shaft away from the lower mold, and the extrusion plate is welded and fixed to the end of the shaft.

[0012] In detail, a spring is wound around the surface of the shaft, and the two ends of the spring are welded and fixed to the end face of the bushing and the surface of the extrusion plate, respectively.

[0013] In detail, a motor is also provided above the base. The lower end of the motor is fixedly assembled to the surface of the base by screws. The motor has a drive shaft inside, and an eccentric wheel is fixed to the end of the shaft. The near and far ends of the eccentric wheel are always in close contact with the surface of the extrusion plate.

[0014] In detail, a side plate is provided on the other side above the base. The lower end of the side plate is fixedly assembled with the surface of the base. A positioning rod is fixed on one side of the side plate. A positioning cylinder is slidably sleeved on the surface of the positioning rod. The other end of the positioning cylinder is fixed to the surface of the lower mold by screws.

[0015] In detail, the surface of the positioning rod is wound with a second spring, and the two ends of the second spring are welded and fixed to the surface of the side plate and the end face of the positioning cylinder, respectively.

[0016] In detail, a threaded ring is welded and fixed on one side of the lower mold. The threaded ring is tightly attached to the surface of the base. The interior of the base has a threaded groove corresponding to the threaded ring. A threaded knob is threadedly connected to the interior of the threaded ring. The end of the threaded knob is threadedly connected to the interior of the threaded groove.

[0017] The design scheme proposed in this utility model has the following beneficial effects in application:

[0018] 1. When injection molding is required, the piston rod of the cylinder is pushed forward, so that the upper mold can move downward and close with the lower mold, thereby achieving the sealing of the mold cavity. Through the injection interface, the plastic material fluid is introduced into the mold cavity to process plastic toys.

[0019] 2. When demolding is required, first turn the threaded knob to separate it from the threaded ring and threaded groove, which allows the lower mold to move relative to the base. Then, turn on the motor power, and the motor can drive the rotating shaft, which in turn drives the eccentric wheel to rotate. Through the continuous contact between the near and far ends of the eccentric wheel and the extrusion plate, the shaft can slide in the bushing. Through the compression and reset effect of the spring, the striking block can continuously strike the lower mold at high speed, which makes the lower mold vibrate and improves the separation and demolding of the plastic molded part from the lower mold.

[0020] 3. By sliding the positioning cylinder on the surface of the positioning rod and cooperating with the compression and reset of the second spring, the lower mold can have a short buffer distance when the striking block strikes the lower mold, which can protect the structure of the striking part and at the same time, does not affect the striking effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a bottom view of the upper mold of this utility model;

[0023] Figure 3 This is a schematic diagram of the driving mechanism of the striking block part of this utility model;

[0024] Figure 4 This is a schematic diagram showing the connection between the positioning cylinder and the positioning rod of this utility model.

[0025] In the diagram: 1. Base; 11. Column; 12. Top plate; 13. Cylinder; 14. Upper mold; 15. Internal groove; 16. Injection interface; 17. Through hole; 18. Lower mold; 19. Mold cavity; 2. Bushing; 21. Shaft; 22. Striking block; 23. Extrusion plate; 24. Spring 1; 25. Motor; 26. Eccentric wheel; 3. Side plate; 31. Positioning rod; 32. Spring 2; 33. Positioning cylinder; 4. Threaded ring; 41. Threaded knob. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Reference Figures 1-4 A mold for easy demolding of plastic toys includes a base 1, four pillars 11 are provided on the top of the base 1, and the pillars 11 are distributed at the top corners of the upper end face of the base 1. The lower ends of the pillars 11 are fixed to the surface of the base 1 by screws. The upper ends of the four pillars 11 are connected to the same top plate 12. A cylinder 13 is provided through the inside of the top plate 12. The connection between the cylinder 13 and the top plate 12 is fixed by screws. The cylinders 13 are symmetrically distributed on both sides of the top plate 12. The cylinder 13 is provided with a piston rod for extension and retraction. A through hole 17 is provided between two cylinders 13 and is provided through the middle of the top plate 12.

[0028] The piston rod end of the cylinder 13 is fixed with an upper mold 14. The lower end of the upper mold 14 is provided with an internal groove 15. An injection interface 16 is provided inside the internal groove 15. The injection interface 16 is connected to the upper mold 14. The connection position between the injection interface 16 and the upper mold 14 is welded and fixed. The injection interface 16 is correspondingly provided with the through hole 17.

[0029] A lower mold 18 is also provided above the base 1. The lower mold 18 is slidably attached to the base 1. The interior of the lower mold 18 is provided with a mold cavity 19. The position of the lower mold 18 corresponds to the position of the upper mold 14.

[0030] It should be further noted that a bushing 2 is provided on the upper side of the base 1. The outer ring wall of the bushing 2 is fixed to the surface of the base 1 by a bracket. The bushing 2 has a slidable shaft 21 inside, which can ensure the stability of the extension and retraction of the striking block 22.

[0031] It should be further noted that a striking block 22 is provided at the end of the shaft 21 near the lower mold 18, and the striking block 22 is welded and fixed to the end of the shaft 21. An extrusion plate 23 is provided at the end of the shaft 21 away from the lower mold 18, and the extrusion plate 23 is welded and fixed to the end of the shaft 21.

[0032] It should be further explained that the surface of the shaft 21 is wound with a spring 24. The two ends of the spring 24 are welded and fixed to the end face of the bushing 2 and the surface of the extrusion plate 23, respectively. The spring 24 can ensure that the striking block 22 has a reset effect after striking the lower mold 18, and can ensure the stability of the reciprocating movement of the striking block 22.

[0033] It should be further explained that a motor 25 is also provided above the base 1. The lower end of the motor 25 is fixedly assembled to the surface of the base 1 by screws. The motor 25 has a drive shaft inside, and an eccentric wheel 26 is fixed to the end of the shaft. The near and far ends of the eccentric wheel 26 are always in close contact with the surface of the extrusion plate 23. By contacting the extrusion plate 23 with the eccentric wheel 26, sufficient thrust can be ensured when the striking block 22 moves. The motor 25 is a high-speed model. The high-speed rotation of the shaft increases the striking frequency of the striking block 22.

[0034] It should be further noted that a side plate 3 is provided on the other side above the base 1. The lower end of the side plate 3 is fixedly assembled with the surface of the base 1. A positioning rod 31 is fixed on one side of the side plate 3. A positioning cylinder 33 is slidably sleeved on the surface of the positioning rod 31. The other end of the positioning cylinder 33 is fixed to the surface of the lower mold 18 by screws, which can ensure the stable movement of the lower mold 18 during buffer displacement.

[0035] It should be further explained that the surface of the positioning rod 31 is wrapped with a second spring 32. The two ends of the second spring 32 are welded and fixed to the surface of the side plate 3 and the end face of the positioning cylinder 33, respectively. The second spring 32 can ensure that the lower mold 18 has a distance buffering effect on the striking mechanism when it is struck, so as to avoid excessive hard contact and damage to the shaft of the motor 25.

[0036] It should be further explained that a threaded ring 4 is welded and fixed on one side of the lower mold 18. The threaded ring 4 is tightly attached to the surface of the base 1. The interior of the base 1 has a threaded groove corresponding to the threaded ring 4. The threaded ring 4 has a threaded knob 41 inside. The end of the threaded knob 41 is threadedly connected to the interior of the threaded groove, which can play a positioning role when the upper mold 14 and the lower mold 18 are closed.

[0037] Working method: When injection molding is required, the piston rod of cylinder 13 is pushed forward, so that the upper mold 14 can move downward and close with the lower mold 18, thereby closing the mold cavity 19. Through the injection interface 16, which is connected to the external material pump through a hose, the feeding can be stable, and the fluid plastic material can be introduced into the mold cavity 19 for processing plastic toys.

[0038] When demolding is required, first rotate the threaded knob 41 to separate it from the threaded ring 4 and the threaded groove, which can move the lower mold 18 relative to the base 1. Then, turn on the power of the motor 25, which can drive the rotating shaft, thereby driving the eccentric wheel 26 to rotate. Through the continuous contact between the near and far ends of the eccentric wheel 26 and the extrusion plate 23, the shaft 21 can slide in the bushing 2. Through the compression and reset effect of the spring 24, the striking block 22 can continuously strike the lower mold 18 at high speed, causing the lower mold 18 to vibrate, which can improve the separation and demolding of the plastic molded part from the lower mold 18.

[0039] By sliding the positioning cylinder 33 on the surface of the positioning rod 31, and cooperating with the compression and reset of the spring 32, the lower mold 18 can have a short buffer distance when the striking block 22 strikes the lower mold 18, which can protect the structure of the striking part, and at the same time, does not affect the striking effect.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mould for plastic toy facilitating demoulding, comprising a base (1), characterised in that: The upper side of the base (1) is provided with four columns (11), and the columns (11) are correspondingly distributed along the upper end surface corner positions of the base (1), the lower ends of the columns (11) are fixedly assembled with the surface of the base (1) through screws, the upper ends of the four columns (11) are jointly provided with a same top plate (12), the inside of the top plate (12) is provided with a cylinder (13) penetrating through, the connecting position of the cylinder (13) and the top plate (12) is fixedly connected through a screw, the cylinders (13) are symmetrically arranged along the two sides of the top plate (12), the inside of the cylinder (13) is provided with a piston rod for extension and contraction, a through hole (17) is arranged between the two cylinders (13) and penetrates through the middle position of the top plate (12); The end of the piston rod of the cylinder (13) is fixedly connected with an upper mold (14), the downward end of the upper mold (14) is provided with an embedded groove (15), the inside of the embedded groove (15) is provided with an injection interface (16), the injection interface (16) is penetratingly arranged with the upper mold (14), the connecting position of the injection interface (16) and the upper mold (14) is fixedly connected through welding, and the injection interface (16) is correspondingly arranged with the through hole (17). The upper side of the base (1) is further provided with a lower mold (18), the lower mold (18) is slidingly and closely arranged with the base (1), the inside of the lower mold (18) is provided with a mold cavity (19), and the position of the lower mold (18) is correspondingly and fittingly arranged with the position of the upper mold (14).

2. The plastic toy mold according to claim 1, wherein: The upper side of the base (1) is provided with a shaft sleeve (2), the outer wall of the shaft sleeve (2) is fixedly connected with the surface of the base (1) through a support, and the inside of the shaft sleeve (2) is slidingly sleeved with a shaft rod (21).

3. The plastic toy mold according to claim 2, wherein: The end of the shaft rod (21) close to the lower mold (18) is provided with a knocking block (22), the end of the shaft rod (21) is fixedly connected with the knocking block (22) through welding, and the end of the shaft rod (21) away from the lower mold (18) is provided with an extrusion plate (23), the end of the shaft rod (21) is fixedly connected with the extrusion plate (23) through welding.

4. The plastic toy mold according to claim 3, wherein: The surface of the shaft rod (21) is wound with a spring (24), and the two ends of the spring (24) are fixedly connected with the end surface of the shaft sleeve (2) and the surface of the extrusion plate (23) respectively through welding.

5. The plastic toy mold according to claim 4, wherein: The upper side of the base (1) is further provided with a motor (25), the lower end of the motor (25) is fixedly assembled with the surface of the base (1) through a screw, the inside of the motor (25) is provided with a driving shaft, the end of the driving shaft is fixedly connected with an eccentric wheel (26), and the distal end and the proximal end of the eccentric wheel (26) are always closely arranged with the surface of the extrusion plate (23) respectively.

6. The plastic toy mold of claim 1 wherein: The other side of the base (1) is provided with a side plate (3), the lower end of the side plate (3) is fixedly assembled with the surface of the base (1), one side of the side plate (3) is fixedly connected with a positioning rod (31), the surface of the positioning rod (31) is slidingly sleeved with a positioning cylinder (33), and the other end of the positioning cylinder (33) is fixedly connected with the surface of the lower mold (18) through a screw.

7. The plastic toy mold of claim 6 wherein: The surface of the positioning rod (31) is wound with a spring (32), and the two ends of the spring (32) are fixedly connected with the surface of the side plate (3) and the end surface of the positioning cylinder (33) respectively through welding.

8. The plastic toy mold according to claim 1, wherein: One side of the lower mold (18) is welded and fixed with a threaded ring (4), the threaded ring (4) is closely arranged with the surface of the base (1), the inside of the base (1) is provided with a threaded groove corresponding to the threaded ring (4), and the inside of the threaded ring (4) is provided with a threaded knob (41), and the end of the threaded knob (41) is threadedly connected with the inside of the threaded groove.

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