Child plastic dining chair mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a child plastic dining chair mold. The dining chair comprises a dining chair main body forming lower die and a dining chair main body forming upper die, an injection molding part is arranged above the dining chair main body forming upper die, a dining chair main body forming protrusion is arranged on the dining chair main body forming lower die, a dining chair forming concave cavity is formed in the dining chair main body forming lower die, and a dining chair main body is formed in the dining chair main body forming concave cavity. A large concave face inner side forming core-pulling piece is arranged in the dining chair body forming protrusion, and a side core-pulling piece, a side penetrating groove forming piece and an end core-pulling assembly are further arranged in the dining chair body forming lower die. By arranging the plurality of core-pulling assemblies and the forming parts, accurate forming of a complex structure of the child dining chair can be realized, the size accuracy and the quality stability of a product are improved, and the rejection rate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mould technical field relates to a children plastic dining chair mould. BACKGROUND

[0002] In the production process of children plastic dining chair, the design and performance of the mould are very important. The traditional children dining chair mould has many problems when forming the dining chair with complex structure. For example, it is difficult to achieve precise forming for the dining chair body with various hole and groove structures and large concave surface, resulting in poor product size precision and high scrap rate. Moreover, the formed dining chair is easily damaged during demolding, affecting product quality and production efficiency. Therefore, a new type of children plastic dining chair mould is needed to solve the above problems.

[0003] In order to overcome the deficiencies of the prior art, people have explored various solutions. For example, a Chinese patent discloses a inclined guide pillar core-pulling European-style dining chair backrest multi-insert block combined injection mould [application number: 201821990797.4], which comprises a bottom plate, a movable die plate, a fixed die plate and an injection plate. The forming cavity is located between the movable die plate and the fixed die plate. The injection plate has an injection port. The injection port is connected with the forming cavity through an injection runner. The movable die plate movably connects an outer frame body forming insert block. The chair back upper segment forming insert block, the chair back middle segment forming insert block and the chair back lower segment forming insert block are connected in sequence. The chair back upper segment forming insert block, the chair back middle segment forming insert block and the chair back lower segment forming insert block are located in the outer frame body forming insert block and are in close contact with the inner surface of the outer frame body forming insert block. However, this scheme still cannot achieve precise forming for the dining chair body with various hole and groove structures and large concave surface, which may lead to poor product size precision and high scrap rate. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the above problems and provides a children plastic dining chair mould.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A children plastic dining chair mould, which comprises a dining chair body forming lower die and a dining chair body forming upper die. An injection part is arranged above the dining chair body forming upper die. A dining chair body forming protrusion is arranged on the dining chair body forming lower die. A dining chair forming recess is arranged in the dining chair body forming lower die. A large concave inner side forming core-pulling part is arranged in the dining chair body forming protrusion. A side core-pulling part, a side through groove forming part and an end core-pulling assembly are further arranged in the dining chair body forming lower die. The side core-pulling part and the end core-pulling assembly are staggered. The side core-pulling part and the side through groove forming part are parallel to each other. A straight and inclined top combined demolding part is arranged below the dining chair body forming lower die.

[0007] In the aforementioned children's plastic dining chair mold, the end core-pulling assembly includes an end square hole forming rod disposed in the lower mold of the dining chair body, the diameter of which gradually increases from the end closest to the dining chair body forming protrusion.

[0008] In the aforementioned children's plastic dining chair mold, a first cylinder is provided in the lower mold for forming the main body of the dining chair. A first connecting slider is connected to the power shaft of the first cylinder, and the first connecting slider is connected to the end square hole forming rod.

[0009] In the aforementioned children's plastic dining chair mold, the side core-pulling component includes a side fine hole forming rod disposed in the lower mold of the dining chair body, wherein the center line of the side fine hole forming rod is perpendicular to the center line of the end square hole forming rod.

[0010] In the aforementioned children's plastic dining chair mold, a second cylinder is also provided in the lower mold for forming the main body of the dining chair. A second connecting slider is connected to the power shaft of the second cylinder, and the second connecting slider is connected to the side fine hole forming rod.

[0011] In the aforementioned children's plastic dining chair mold, the side through-groove molding part includes a through-groove molding inclined slider disposed on the lower mold of the dining chair body. The through-groove molding inclined slider is parallel to the side fine hole molding rod. An inclined slide rod is provided in the lower mold of the dining chair body, and the through-groove molding inclined slider and the inclined slide rod are in sliding cooperation.

[0012] In the above-mentioned children's plastic dining chair mold, the inner core-pulling component with a large concave surface includes an inner core-pulling block disposed within the forming protrusion of the main body of the dining chair, and the inner core-pulling block can slide along the underside of the forming protrusion of the main body of the dining chair.

[0013] In the aforementioned children's plastic dining chair mold, the straight and angled ejector assembly includes a fixed ejector plate disposed below the lower mold of the main body of the dining chair, and the fixed ejector plate is provided with a plurality of straight ejector rods and angled ejector rods.

[0014] In the aforementioned children's plastic dining chair mold, an inclined ejector connecting slide is provided between the inclined ejector rod and the fixed ejector plate.

[0015] In the aforementioned children's plastic dining chair mold, the injection molded part includes an injection main board and an injection tube disposed above the upper mold for forming the main body of the dining chair.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. By setting multiple core-pulling components and molding parts, this utility model can achieve precise molding of complex structures of children's dining chairs, improve the dimensional accuracy and quality stability of the product, and reduce the scrap rate.

[0018] 2. The design of the straight and inclined top combined demolding parts in this utility model makes the demolding process smoother, avoids damage to the molded dining chair, and improves production efficiency.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0023] Figure 4 This is a schematic diagram of the upper mold for forming the main body of the dining chair.

[0024] In the diagram: 1. Lower mold for main body of dining chair; 2. Upper mold for main body of dining chair; 3. Injection part; 4. Protrusion for main body of dining chair; 5. Cavity for main body of dining chair; 6. Core-pulling part for inner side of large concave surface; 7. Core-pulling part for side; 8. Core-pulling assembly for end; 9. Straight and inclined ejector combined demolding part; 10. Square hole forming rod for end; 11. First cylinder; 12. First connecting slider; 13. Small hole forming rod for side; 14. Second cylinder; 15. Second connecting slider; 16. Inclined slider for through groove forming; 17. Inclined slide rod; 18. Inner core-pulling block; 19. Fixed ejector plate; 20. Straight ejector rod; 21. Inclined ejector rod; 22. Inclined ejector connecting slide; 23. Main injection board; 24. Injection tube; 25. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figures 1-4 As shown, a children's plastic dining chair mold includes a lower mold 1 for forming the main body of the dining chair and an upper mold 2 for forming the main body of the dining chair. An injection molded part 3 is provided above the upper mold 2. A dining chair forming protrusion 4 is provided on the lower mold 1. A dining chair forming cavity 5 is provided inside the lower mold 1. A large concave inner forming core-pulling part 6 is provided inside the protrusion 4. A side core-pulling part 7, a side through-groove forming part 8, and an end core-pulling assembly 9 are also provided inside the lower mold 1. The side core-pulling part 7 and the end core-pulling assembly 9 are staggered. The side core-pulling part 7 and the side through-groove forming part 8 are parallel to each other. A straight and inclined ejector combined demolding part 10 is provided below the lower mold 1.

[0027] In this embodiment, during the injection molding process, the injection molding part 3 is used to inject plastic raw materials into the mold cavity. The inner side of the large concave surface forming core-pulling part 6 is used to form the inner side of the large concave surface of the main body of the dining chair. After the injection molding is completed, the inner side of the large concave surface forming core-pulling part 6 can be pulled out for easy demolding. The side core-pulling part 7 is used to form the fine hole structure on the side of the dining chair. The side through groove forming part 8 is used to form the through groove on the side. The end core-pulling assembly 9 is used to form the square hole structure at the end. The side core-pulling part 7 and the end core-pulling assembly 9 are staggered to make full use of the mold space and realize the forming of complex structures. The side core-pulling part 7 and the side through groove forming part 8 are parallel to each other to ensure that the movement of each part does not interfere with each other. A straight and inclined ejector combined demolding part 10 is provided below the lower mold 1 for forming the main body of the dining chair, which is used to smoothly eject the formed dining chair from the mold after the injection molding is completed.

[0028] Combination Figures 1-4 As shown, the end core-pulling assembly 9 includes an end square hole forming rod 11 disposed in the lower mold 1 for forming the main body of the dining chair. The diameter of the end square hole forming rod 11 gradually increases from the end closer to the forming protrusion 4 of the main body of the dining chair. A first cylinder 12 is provided in the lower mold 1 for forming the main body of the dining chair. A first connecting slider 13 is connected to the power shaft of the first cylinder 12. The first connecting slider 13 is connected to the end square hole forming rod 11.

[0029] Specifically, the diameter of the end square hole forming rod 11 gradually changes from the end closer to the forming protrusion 4 of the dining chair body. This design can better ensure the shape accuracy of the square hole when forming the end square hole, and make it easier to demold when pulling the core. The first cylinder 12 drives the end square hole forming rod 11 to perform core pulling and resetting actions through the first connecting slider 13, so as to realize the forming and demolding of the end square hole.

[0030] Combination Figure 2 , Figure 3 As shown, the side core-pulling component 7 includes a side fine hole forming rod 14 disposed in the lower mold 1 for forming the main body of the dining chair. The center line of the side fine hole forming rod 14 is perpendicular to the center line of the end square hole forming rod 11. The lower mold 1 for forming the main body of the dining chair is also provided with a second cylinder 15. A second connecting slider 16 is connected to the power shaft of the second cylinder 15. The second connecting slider 16 is connected to the side fine hole forming rod 14.

[0031] In this embodiment, the side fine hole forming rod 14 can simultaneously form the side fine hole structure of the plastic part without secondary processing. The second cylinder 15 drives the side fine hole forming rod 14 to perform core pulling and resetting actions through the second connecting slider 16, thereby realizing the forming and demolding of the side fine hole.

[0032] Combination Figure 3As shown, the side through-groove forming part 8 includes a through-groove forming inclined slider 17 disposed on the lower mold 1 for forming the main body of the dining chair. The through-groove forming inclined slider 17 is parallel to the side fine hole forming rod 14. An inclined slide rod 18 is provided in the lower mold 1 for forming the main body of the dining chair. The through-groove forming inclined slider 17 and the inclined slide rod 18 are in sliding cooperation.

[0033] In this embodiment, during the injection molding process, the through-groove forming inclined slider 17 can simultaneously form a large-area through-groove structure on the side of the plastic part. After the injection molding is completed, the large-area through-groove structure can be demolded at an angle by sliding the through-groove forming inclined slider 17 and the inclined slider 18.

[0034] The inner core-pulling component 6 with a large concave surface includes an inner core-pulling block 19 disposed within the forming protrusion 4 of the main body of the dining chair, and the inner core-pulling block 19 can slide along the underside of the forming protrusion 4 of the main body of the dining chair.

[0035] In this embodiment, during the injection molding process, the inner core-pulling block 19 can simultaneously form the inner concave surface structure of the plastic part. After the injection molding is completed, the inner core-pulling block 19 is moved down to provide a larger demolding space for the product and avoid adhesion.

[0036] Combination Figures 1-3 As shown, the straight and inclined ejector combined demolding component 10 includes a fixed ejector plate 20 disposed below the lower mold 1 for forming the main body of the dining chair. The fixed ejector plate 20 is provided with a plurality of straight ejector rods 21 and inclined ejector rods 22. An inclined ejector connecting slide 23 is provided between the inclined ejector rods 22 and the fixed ejector plate 20.

[0037] In this embodiment, the fixed ejector plate 20 is used to connect the fixed straight ejector rod 21, and the inclined ejector connecting slide 23 is used to connect the inclined ejector rod 22. After injection molding is completed, the fixed ejector plate 20 moves upward, and the straight ejector rod 21 and the inclined ejector rod 22 eject the molded dining chair from the mold. The inclined ejector rod 22 achieves inclined movement through the inclined ejector connecting slide 23, which avoids damage to the molded dining chair during the ejection process. The combination structure of inclined and straight ejectors has high demolding efficiency.

[0038] Combination Figures 1-4 As shown, the injection molded part 3 includes an injection molding main plate 24 and an injection molding tube 25 disposed above the upper mold 2 for forming the main body of the dining chair.

[0039] In this embodiment, during injection molding, the molten material is injected into the cavity through the injection molding main plate 24 and the injection molding tube 25.

[0040] The working principle of this utility model is as follows:

[0041] Molten material is injected into the injection molding main board 24 through the injection tube 25. The injection molding main board 24 then evenly injects the plastic material into the mold cavity composed of the upper mold 2 for the main body of the dining chair, the lower mold 1 for the main body of the dining chair, various core-pulling components, and molded parts. During the injection molding process, each core-pulling component and molded part remains in its original position to ensure the stability of the shape of the cavity, thus completing the injection molding of the main body of the children's dining chair.

[0042] After injection molding, the first cylinder 12 is activated, which drives the end square hole forming rod 11 to be pulled out through the first connecting slider 13, completing the demolding of the end square hole; then the second cylinder 15 is activated, which drives the side fine hole forming rod 14 to be pulled out through the second connecting slider 16, completing the demolding of the side fine hole; at the same time, the through groove forming inclined slider 17 slides out along the inclined slider 18, completing the demolding of the side through groove; then the inner core pulling block 19 in the inner core pulling part 6 of the large concave surface is slid out below the forming protrusion 4 of the main body of the dining chair; finally, the fixed ejector plate 20 moves upward, and the straight ejector rod 21 and the inclined ejector rod 22 push the formed children's dining chair out of the mold, completing the entire demolding process.

[0043] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0044] Although this article frequently uses terms such as 1. lower mold for the main body of the dining chair; 2. upper mold for the main body of the dining chair; 3. injection molded part; 4. protrusion for the main body of the dining chair; 5. cavity for the main body of the dining chair; 6. core-pulling part for the inner side of the large concave surface; 7. side core-pulling part; 8. side through-slot molding part; 9. end core-pulling assembly; 10. straight and inclined ejector combined demolding part; 11. end square hole molding rod; 12. first cylinder; 13. first connecting slider; 14. side fine hole molding rod; 15. second cylinder; 16. second connecting slider; 17. through-slot molding inclined slider; 18. inclined slide rod; 19. inner core-pulling block; 20. fixed ejector plate; 21. straight ejector rod; 22. inclined ejector rod; 23. inclined ejector connecting slide; 24. injection main board; 25. injection tube, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A mould for a plastic child's dining chair comprising a lower mould half (1) for forming the body of the dining chair and an upper mould half (2) for forming the body of the dining chair, characterised in that, The upper part of the dining chair body forming upper die (2) is provided with an injection molding part (3), the dining chair body forming lower die (1) is provided with a dining chair body forming convex (4), the dining chair body forming lower die (1) is provided with a dining chair forming concave cavity (5), the dining chair body forming convex (4) is provided with a large concave inner side forming core pulling part (6), the dining chair body forming lower die (1) is further provided with a side core pulling part (7), a side through slot forming part (8) and an end core pulling assembly (9), the side core pulling part (7) and the end core pulling assembly (9) are staggered, the side core pulling part (7) and the side through slot forming part (8) are parallel to each other, and the lower part of the dining chair body forming lower die (1) is provided with a straight and inclined combined stripping part (10).

2. The child plastic dining chair mold of claim 1, wherein, The end core pulling assembly (9) comprises an end square hole forming rod (11) arranged in the dining chair body forming lower die (1), and the diameter of the end square hole forming rod (11) gradually increases from the end close to the dining chair body forming convex (4) to the end away from the dining chair body forming convex (4).

3. The child plastic dining chair mold of claim 2, wherein, The dining chair body forming lower die (1) is provided with a first air cylinder (12), and a first connecting sliding block (13) is connected to the power shaft of the first air cylinder (12).

4. The child plastic dining chair mold of claim 3, wherein, The side core pulling part (7) comprises a side thin hole forming rod (14) arranged in the dining chair body forming lower die (1), and the center line of the side thin hole forming rod (14) is perpendicular to the center line of the end square hole forming rod (11).

5. The child plastic dining chair mold of claim 4, wherein, The dining chair body forming lower die (1) is further provided with a second air cylinder (15), and a second connecting sliding block (16) is connected to the power shaft of the second air cylinder (15).

6. The child plastic dining chair mold of claim 5, wherein, The side through slot forming part (8) comprises a through slot forming inclined sliding block (17) arranged on the dining chair body forming lower die (1), the through slot forming inclined sliding block (17) is parallel to the side thin hole forming rod (14), the dining chair body forming lower die (1) is provided with an inclined sliding rod (18), and the through slot forming inclined sliding block (17) and the inclined sliding rod (18) are in sliding fit.

7. The child plastic dining chair mold of claim 6, wherein, The large concave inner side forming core pulling part (6) comprises an inner side core pulling block (19) arranged in the dining chair body forming convex (4), and the inner side core pulling block (19) can slide downward along the dining chair body forming convex (4).

8. The child plastic dining chair mold of claim 7, wherein, The straight and inclined combined stripping part (10) comprises a fixed ejection plate (20) arranged below the dining chair body forming lower die (1), and a plurality of straight ejection rods (21) and inclined ejection rods (22) are arranged on the fixed ejection plate (20).

9. The child plastic dining chair mold of claim 8, wherein, The inclined ejection rod (22) and the fixed ejection plate (20) are provided with an inclined ejection connecting sliding seat (23).

10. The child plastic dining chair mold of claim 9, wherein, The injection molding part (3) comprises an injection molding main plate (24) and an injection molding pipe (25) arranged above the dining chair body forming upper die (2).

Images