Rotational molding mold for multi-wall overwater buoy

Abstract

The utility model belongs to the technical field of molds, and relates to a rotational molding mold for a multi-wall overwater buoy. The mold comprises a first half mold and a second half mold, and a first forming half cavity is formed in the first half mold. When the mold is used, a molten material is injected into the cavity through the injection molding opening, the first half mold and the second half mold axially rotate along the injection molding opening and are heated, and the molten material is gradually and uniformly molten, flows and is adhered on the inner surface of the mold; the first multi-layer concave wall forming structure and the second multi-layer concave wall forming structure can synchronously form a multi-layer concave wall structure of the overwater float bowl plastic part, the thickening labeling forming part can synchronously form a thick-wall labeling area on the surface of the overwater float bowl plastic part, an integrated forming mode is adopted, on one hand, the overall structural strength of the plastic part is enhanced, and on the other hand, the overall structure strength of the plastic part is improved; and on the other hand, secondary processing is not needed, the working procedure is shortened, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mould technical field relates to a kind of multilayer wall water floating cylinder rotational moulding forming mould. BACKGROUND

[0002] Printed rotational moulding is a kind of processing technology of plastics, and the water floating cylinder used in water operation adopts hollow structure, and is usually molded by rotational moulding. Since the water floating cylinder is generally used in rows, the surface thereof needs to be provided with concave wall structure for connecting with ropes or other connecting members. In the existing rotational molding process of the water floating cylinder, it is difficult to synchronously form the multilayer concave wall structure on the floating cylinder, and secondary processing is required, which may damage the floating cylinder and cause the floating cylinder to sink once a hole is formed, and the production efficiency is affected due to the multiple processes. Therefore, it is urgent to design a multilayer wall water floating cylinder rotational molding mold that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions, such as a floating cylinder rotational molding mold disclosed in Chinese patent [application number: 202322936232.5], which comprises a rotational molding cylinder, the middle part of the rotational molding cylinder is divided into two hollow halves along the length direction, the two hollow halves are connected by a plurality of connecting structures, the connecting structures are uniformly distributed on the outer periphery of the separation surface of the rotational molding cylinder, at least one filling hole forming structure is provided on one of the hollow halves, and at least one groove is provided on the outer periphery of the rotational molding cylinder. However, in the rotational molding process, it is still difficult to synchronously form the multilayer concave wall structure on the floating cylinder, and secondary processing is still required, which may damage the floating cylinder and cause the floating cylinder to sink once a hole is formed, and the production efficiency is affected due to the multiple processes. SUMMARY

[0004] The utility model aims at the above problem, provide a kind of multilayer wall water floating cylinder rotational molding mold.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of multilayer wall water floating cylinder rotational molding mold, including first half mould and second half mould, the first half mould has first forming half cavity, the second half mould has second forming half cavity, the first half mould is equipped with first sealing portion and first injection molding half mouth, the second half mould is equipped with second sealing portion and second injection molding half mouth, when first sealing portion and second sealing portion are abutted, first forming half cavity and second forming half cavity are opposite and form complete cavity, the first forming half cavity has first multilayer concave wall forming structure and thickening label forming part, the second forming half cavity has second multilayer concave wall forming structure, the position of first multilayer concave wall forming structure and second multilayer concave wall forming structure corresponds and shape is matched.

[0007] In the multi-layer wall water floating cylinder rotational molding forming mold, the first multi-layer concave wall forming structure comprises a first side concave wall forming protrusion and a first top and bottom concave wall forming protrusion arranged in the first forming half cavity, and the first side concave wall forming protrusion and the first top and bottom concave wall forming protrusion are staggered.

[0008] In the multi-layer wall water floating cylinder rotational molding forming mold, the second multi-layer concave wall forming structure comprises a second side concave wall forming protrusion and a second top and bottom concave wall forming protrusion arranged in the second forming half cavity, the second side concave wall forming protrusion and the second top and bottom concave wall forming protrusion are staggered, the second side concave wall forming protrusion is opposite to the first side concave wall forming protrusion, and the second top and bottom concave wall forming protrusion is opposite to the first top and bottom concave wall forming protrusion.

[0009] In the multi-layer wall water floating cylinder rotational molding forming mold, the first side concave wall forming protrusion is provided with a first side wall hole forming protrusion, the second side concave wall forming protrusion is provided with a second side wall forming protrusion, and the first side wall hole forming protrusion is abutted with the second side wall forming protrusion when the mold is closed.

[0010] In the multi-layer wall water floating cylinder rotational molding forming mold, the first top and bottom concave wall forming protrusion is provided with a first top and bottom wall hole forming protrusion, the second top and bottom concave wall forming protrusion is provided with a second top and bottom wall hole forming protrusion, and the first top and bottom wall hole forming protrusion is abutted with the second top and bottom wall hole forming protrusion when the mold is closed.

[0011] In the multi-layer wall water floating cylinder rotational molding forming mold, the bottom of the first forming half cavity is provided with two first bottom side groove forming protrusions, the bottom of the second forming half cavity is provided with two second bottom side groove forming protrusions, and the first bottom side groove forming protrusions are opposite to the second bottom side groove forming protrusions.

[0012] In the multi-layer wall water floating cylinder rotational molding forming mold, the first bottom side groove forming protrusions are parallel to the first top and bottom concave wall forming protrusions, and the second bottom side groove forming protrusions are parallel to the second top and bottom concave wall forming protrusions.

[0013] In the multi-layer wall water floating cylinder rotational molding forming mold, the thickened label forming part comprises an inner label forming groove arranged in the first forming half cavity.

[0014] In the multi-layer wall water floating cylinder rotational molding forming mold, the first sealing part comprises a first sealing protrusion arranged on the first half mold, the second sealing part comprises a second sealing protrusion arranged on the second half mold, and the positions of the first sealing protrusion and the second sealing protrusion correspond to each other and the shapes are matched.

[0015] In the multi-layer wall water floating tube rotational molding forming mold, the first half mold and the second half mold have a plurality of ejection hole grooves.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1、The utility model discloses a first half mold and a second half mold are approached to each other, so that the first sealing part and the second sealing part abut, play a sealing effect, the first injection molding half mouth and the second injection molding half mouth are closed to form a complete injection molding mouth, the first forming half cavity and the second forming half cavity are opposite to form a complete cavity, and the molten material is injected into the cavity through the injection molding mouth, and the first half mold and the second half mold are axially rotated along the injection molding mouth and heated, and the molten material gradually melts, flows and adheres on the inner surface of the mold, in the forming process, the first multilayer concave wall forming structure and the second multilayer concave wall forming structure can synchronously form the multilayer concave wall structure of the water floating tube plastic part, and the thick wall label forming part can synchronously form the thick wall label area on the surface of the water floating tube plastic part, which adopts an integrated forming mode, on the one hand, the structural strength of the plastic part is enhanced, and on the other hand, secondary processing is not needed, the process is shortened, and the production efficiency is improved.

[0018] 2、The utility model discloses a first side wall hole forming protrusion and a second side wall forming protrusion are abutted in the rotational molding process, and are used to form the side wall connecting hole structure of the plastic part, and a first top and bottom wall hole forming protrusion and a second top and bottom wall hole forming protrusion are abutted, and are used to form the top and bottom wall connecting hole structure of the plastic part.

[0019] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structure schematic diagram of the utility model.

[0021] Figure 2 It is the structure schematic diagram of another direction of the utility model.

[0022] Figure 3 It is the structure schematic diagram of the first half mold.

[0023] Figure 4 It is the structure schematic diagram of the second half mold.

[0024] In the figure: the first half mold 1, the second half mold 2, the first forming half cavity 3, the second forming half cavity 4, the first sealing part 5, the first injection molding half mouth 6, the second sealing part 7, the second injection molding half mouth 8, the first multi-layer concave wall forming structure 9, the thickened labeling forming part 10, the second multi-layer concave wall forming structure 11, the first side concave wall forming protrusion 12, the first top and bottom concave wall forming protrusion 13, the second side concave wall forming protrusion 14, the second top and bottom concave wall forming protrusion 15, the first side wall hole forming protrusion 16, the second side wall forming protrusion 17, the first top and bottom wall hole forming protrusion 18, the second top and bottom wall hole forming protrusion 19, the first bottom side groove forming protrusion 20, the second bottom side groove forming protrusion 21, the labeling forming groove 22, the first sealing protrusion 23, the second sealing protrusion 24, the ejection hole groove 25. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with the drawings below.

[0026] As Figures 1-4 shown, a multi-layer wall water floating cylinder rotational molding forming mold, including first half mold 1 and second half mold 2, first half mold 1 has first forming half cavity 3 in, second half mold 2 has second forming half cavity 4 in, first half mold 1 is equipped with first sealing part 5 and first injection molding half mouth 6, second half mold 2 is equipped with second sealing part 7 and second injection molding half mouth 8, when first sealing part 5 and second sealing part 7 are in abutment, first forming half cavity 3 and second forming half cavity 4 are opposite and form complete cavity, first forming half cavity 3 has first multi-layer concave wall forming structure 9 and thickened labeling forming part 10 in, second forming half cavity 4 has second multi-layer concave wall forming structure 11 in, the position of first multi-layer concave wall forming structure 9 and second multi-layer concave wall forming structure 11 corresponds and shape is matched.

[0027] In this embodiment, in use, first half mold 1 and second half mold 2 are close to each other, so that first sealing part 5 and second sealing part 7 are in abutment, play the sealing effect, first injection molding half mouth 6 and second injection molding half mouth 8 are in convergence and form complete injection molding mouth, first forming half cavity 3 and second forming half cavity 4 are opposite and form complete cavity, and molten material is injected into the cavity through the injection molding mouth, and first half mold 1 and second half mold 2 are axially rotated along the injection molding mouth and heated, and the molten material gradually and uniformly melts, flows and adheres on the inner surface of the mold, and in the forming process, first multi-layer concave wall forming structure 9 and second multi-layer concave wall forming structure 11 can synchronously form the multi-layer concave wall structure of the water floating cylinder plastic part, and thickened labeling forming part 10 can synchronously form the thick wall labeling area on the surface of the water floating cylinder plastic part, which adopts an integrated forming mode, on the one hand, the structural strength of the plastic part as a whole is enhanced, and on the other hand, secondary processing is not needed, the process is shortened, and the production efficiency is improved.

[0028] In combination Figures 1-4As shown, the first multi-layered concave wall forming structure 9 comprises a first side concave wall forming protrusion 12 and a first top-bottom concave wall forming protrusion 13 arranged in the first forming half cavity 3, the first side concave wall forming protrusion 12 and the first top-bottom concave wall forming protrusion 13 are staggered, the second multi-layered concave wall forming structure 11 comprises a second side concave wall forming protrusion 14 and a second top-bottom concave wall forming protrusion 15 arranged in the second forming half cavity 4, the second side concave wall forming protrusion 14 and the second top-bottom concave wall forming protrusion 15 are staggered, the second side concave wall forming protrusion 14 is opposite to the first side concave wall forming protrusion 12, and the second top-bottom concave wall forming protrusion 15 is opposite to the first top-bottom concave wall forming protrusion 13.

[0029] In the embodiment, during the rotational molding process, the second side concave wall forming protrusion 14 is opposite to the first side concave wall forming protrusion 12 to form a side concave wall structure of the plastic part, and the second top-bottom concave wall forming protrusion 15 is opposite to the first top-bottom concave wall forming protrusion 13 to form a top-bottom concave wall structure of the plastic part.

[0030] The first side concave wall forming protrusion 12 is provided with a first side wall hole forming protrusion 16, the second side concave wall forming protrusion 14 is provided with a second side wall forming protrusion 17, when the mold is closed, the first side wall hole forming protrusion 16 is abutted with the second side wall forming protrusion 17, the first top-bottom concave wall forming protrusion 13 is provided with a first top-bottom wall hole forming protrusion 18, the second top-bottom concave wall forming protrusion 15 is provided with a second top-bottom wall hole forming protrusion 19, when the mold is closed, the first top-bottom wall hole forming protrusion 18 is abutted with the second top-bottom wall hole forming protrusion 19.

[0031] In the embodiment, during the rotational molding process, the first side wall hole forming protrusion 16 is abutted with the second side wall forming protrusion 17 to form a side wall connecting hole structure of the plastic part, and the first top-bottom wall hole forming protrusion 18 is abutted with the second top-bottom wall hole forming protrusion 19 to form a top-bottom wall connecting hole structure of the plastic part.

[0032] The first forming half cavity 3 is provided with two first bottom side groove forming protrusions 20 at the bottom, the second forming half cavity 4 is provided with two second bottom side groove forming protrusions 21 at the bottom, and the first bottom side groove forming protrusions 20 are opposite to the second bottom side groove forming protrusions 21.

[0033] In the embodiment, during the rotational molding process, the first bottom side groove forming protrusions 20 are opposite to the second bottom side groove forming protrusions 21 to synchronously form a bottom side groove structure of the plastic part, without the need for secondary processing.

[0034] The first bottom side groove forming protrusions 20 are parallel to the first top-bottom concave wall forming protrusions 13, and the second bottom side groove forming protrusions 21 are parallel to the second top-bottom concave wall forming protrusions 15.

[0035] In the embodiment, the first bottom-side recessed groove forming protrusion 20 is parallel to the first top-bottom recessed wall forming protrusion 13, and the second bottom-side recessed groove forming protrusion 21 is parallel to the second top-bottom recessed wall forming protrusion 15, and they do not interfere with each other, and the structure is compact and reasonable.

[0036] In combination with Figure 3 As shown, the thickened label forming part 10 includes an inner label forming recess 22 arranged on the first forming half cavity 3.

[0037] In the embodiment, in the rotational molding process, the inner label forming recess 22 can synchronously form a thick-wall label area on the surface of the plastic part of the water float.

[0038] In combination with Figures 2-4 As shown, the first sealing part 5 includes a first sealing protrusion 23 arranged on the first half mold 1, the second sealing part 7 includes a second sealing protrusion 24 arranged on the second half mold 2, and the first sealing protrusion 23 and the second sealing protrusion 24 correspond in position and are matched in shape.

[0039] In the embodiment, in the rotational molding process, the first sealing protrusion 23 and the second sealing protrusion 24 abut each other, and have good sealing performance, thereby avoiding leakage.

[0040] In combination with Figure 3 , Figure 4 As shown, the first half mold 1 and the second half mold 2 have a plurality of ejection hole grooves 25.

[0041] In the embodiment, after the rotational molding is completed, the first half mold 1 and the second half mold 2 are opened, and the plastic part is ejected and demolded by the ejection rod through the ejection hole groove 25.

[0042] The working principle of the utility model is:

[0043] In use, the first mold half 1 and the second mold half 2 are moved close to each other, so that the first sealing protrusion 23 abuts against the second sealing protrusion 24, having good sealing property, avoiding leakage, the first injection molding half 6 and the second injection molding half 8 are folded to form a complete injection molding mouth, the first molding half cavity 3 and the second molding half cavity 4 are opposite to each other to form a complete cavity, the molten material is injected into the cavity through the injection molding mouth, and the first mold half 1 and the second mold half 2 are axially rotated along the injection molding mouth and heated, the molten material is gradually and uniformly melted, flowed and adhered on the inner surface of the mold, in the rotational molding process, the second side recess molding protrusion 14 is opposite to the first side recess molding protrusion 12 to form a side recess structure of the plastic part, the second top and bottom recess molding protrusion 15 is opposite to the first top and bottom recess molding protrusion 13 to form a top and bottom recess structure of the plastic part, the first side wall hole molding protrusion 16 abuts against the second side wall molding protrusion 17 to form a side wall connecting hole structure of the plastic part, the first top and bottom wall hole molding protrusion 18 abuts against the second top and bottom wall hole molding protrusion 19 to form a top and bottom wall connecting hole structure of the plastic part, the first bottom side recess molding protrusion 20 is arranged opposite to the second bottom side recess molding protrusion 21 to synchronously form a bottom side recess structure of the plastic part without secondary processing, the first bottom side recess molding protrusion 20 is parallel to the first top and bottom recess molding protrusion 13, the second bottom side recess molding protrusion 21 is parallel to the second top and bottom recess molding protrusion 15, and they do not interfere with each other, the structure is compact and reasonable, the inner label molding recess 22 can synchronously form a thick wall label area on the surface of the water float plastic part, and the integrated molding is adopted, on the one hand, the structural strength of the plastic part is enhanced, and on the other hand, secondary processing is not needed, the process is shortened, and the production efficiency is improved,

[0044] After the rotational molding is completed, the first mold half 1 and the second mold half 2 are opened, and the plastic part is ejected and demolded through the ejection hole slot 25 in cooperation with the ejection rod.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application.

[0046] Although the terms first half mold 1, second half mold 2, first molding half cavity 3, second molding half cavity 4, first sealing part 5, first injection molding half mouth 6, second sealing part 7, second injection molding half mouth 8, first multi-layer concave wall molding structure 9, thickened labeling molding part 10, second multi-layer concave wall molding structure 11, first side part concave wall molding protrusion 12, first top and bottom part concave wall molding protrusion 13, second side part concave wall molding protrusion 14, second top and bottom part concave wall molding protrusion 15, first side wall hole molding protrusion 16, second side wall molding protrusion 17, first top and bottom wall hole molding protrusion 18, second top and bottom wall hole molding protrusion 19, first bottom side groove molding protrusion 20, second bottom side groove molding protrusion 21, labeling molding groove 22, first sealing protrusion 23, second sealing protrusion 24, ejection hole groove 25 are used more frequently in the description, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the utility model, and it is against the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A multi-walled water float roto-moulding mould comprising a first mould half (1) and a second mould half (2), characterised in that, The first half mold (1) has a first forming half cavity (3), the second half mold (2) has a second forming half cavity (4), the first half mold (1) is provided with a first sealing part (5) and a first injection molding half mouth (6), the second half mold (2) is provided with a second sealing part (7) and a second injection molding half mouth (8), when the first sealing part (5) and the second sealing part (7) abut, the first forming half cavity (3) and the second forming half cavity (4) are opposite to form a complete cavity, the first forming half cavity (3) has a first multilayer concave wall forming structure (9) and a thickening labeling forming part (10), the second forming half cavity (4) has a second multilayer concave wall forming structure (11), the first multilayer concave wall forming structure (9) and the second multilayer concave wall forming structure (11) correspond in position and match in shape.

2. The multi-walled pontoon rotational molding mold of claim 1, wherein, The first multilayer concave wall forming structure (9) includes a first side concave wall forming protrusion (12) and a first top and bottom concave wall forming protrusion (13) arranged in the first forming half cavity (3), and the first side concave wall forming protrusion (12) and the first top and bottom concave wall forming protrusion (13) are staggered.

3. The multi-walled pontoon rotational molding mold of claim 2, wherein, The second multilayer concave wall forming structure (11) includes a second side concave wall forming protrusion (14) and a second top and bottom concave wall forming protrusion (15) arranged in the second forming half cavity (4), and the second side concave wall forming protrusion (14) and the second top and bottom concave wall forming protrusion (15) are staggered, the second side concave wall forming protrusion (14) is opposite to the first side concave wall forming protrusion (12), and the second top and bottom concave wall forming protrusion (15) is opposite to the first top and bottom concave wall forming protrusion (13).

4. The multi-walled pontoon rotational molding mold of claim 3, wherein, The first side concave wall forming protrusion (12) is provided with a first side wall hole forming protrusion (16), the second side concave wall forming protrusion (14) is provided with a second side wall forming protrusion (17), and when the mold is closed, the first side wall hole forming protrusion (16) abuts against the second side wall forming protrusion (17).

5. The multi-walled pontoon rotational molding mold of claim 4, wherein, The first top and bottom concave wall forming protrusion (13) is provided with a first top and bottom wall hole forming protrusion (18), the second top and bottom concave wall forming protrusion (15) is provided with a second top and bottom wall hole forming protrusion (19), and when the mold is closed, the first top and bottom wall hole forming protrusion (18) abuts against the second top and bottom wall hole forming protrusion (19).

6. The multi-walled pontoon rotational molding mold of claim 5, wherein, The first forming half cavity (3) is provided with two first bottom side recess forming protrusions (20) at the bottom, the second forming half cavity (4) is provided with two second bottom side recess forming protrusions (21) at the bottom, and the first bottom side recess forming protrusions (20) and the second bottom side recess forming protrusions (21) are opposite.

7. The multi-walled pontoon rotational molding mold of claim 6, wherein, The first bottom side recess forming protrusion (20) and the first top and bottom concave wall forming protrusion (13) are parallel to each other, and the second bottom side recess forming protrusion (21) and the second top and bottom concave wall forming protrusion (15) are parallel to each other.

8. The multi-walled pontoon rotational molding mold of claim 1, wherein, The thickening labeling forming part (10) includes an inner labeling forming groove (22) arranged in the first forming half cavity (3).

9. The multi-walled pontoon rotational molding mold of claim 1, wherein, The first sealing part (5) comprises a first sealing convex strip (23) arranged on the first half mold (1), the second sealing part (7) comprises a second sealing convex strip (24) arranged on the second half mold (2), the first sealing convex strip (23) corresponds to the position of the second sealing convex strip (24) and is matched in shape.

10. The multi-walled pontoon rotational molding mold of claim 1, wherein, The first half mold (1) and the second half mold (2) have a plurality of ejection hole grooves (25).

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