A new type of roto-molding ball mold

By setting side holes on the side of the positioning column of the rotomold ball mold and setting a slope in the engagement structure, the problems of uneven heating of the mold and excessive clamping line are solved, and the uniform thickness of the ball wall and beautiful appearance are improved.

CN222727161UActive Publication Date: 2025-04-08GUANGDONG KESHANG MACHINERY CO LTD
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Patent Information

Application Number
CN202421540415.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-02
Publication Date
2025-04-08
Estimated Expiration
2034-07-02

AI Technical Summary

Technical Problem

The existing rotomold ball molds are unevenly heated during the heating process, resulting in uneven wall thickness of the ball and too large a mold clamp line, which affects the aesthetics.

Method used

By setting up upper ball side holes and lower ball side holes on the positioning column sides of the upper ball mold and the lower ball mold, the thickness of the bottom surface of the positioning column is reduced, ensuring uniform wall thickness of the mold, and reducing the width of the mold clamp line by setting up the upper ball engaging inclined surface and the lower ball engaging inclined surface.

Benefits of technology

The wall thickness of the ball mold is uniformly heated, the wall thickness of the ball produced is more uniform, and the mold clamping line is reduced, which improves the aesthetics of the ball appearance and product quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

A novel rotationally molded ball mold relates to the technical field related to ball production and processing, comprising an upper ball mold and a lower ball mold that are engaged with each other, the mold cavity of the upper ball mold is hemispherical, an upper ball engaging structure is provided at its open end, an upper ball positioning column is provided at its lower top, and a plurality of upper ball side holes are provided on the side of the upper ball positioning column; the mold cavity of the lower ball mold is hemispherical, a lower ball engaging structure is provided at its open end, a lower ball positioning column is provided at its lower top, and a plurality of lower ball side holes are provided on the side of the lower ball positioning column. The utility model mainly reduces the thickness of the bottom surface of the positioning column by setting the upper ball side hole and the lower ball side hole, so that the wall thickness of each part of the ball mold is more uniform, and then the various parts of the ball mold can be heated evenly, so that balls with more uniform wall thickness can be produced, and the product quality is effectively improved. By setting the upper ball clamping inclined surface and the lower ball clamping inclined surface, the upper ball mold and the lower ball mold are clamped more tightly, the width of the mold line is reduced, and then the mold line marks of the rotationally molded ball are reduced, and the aesthetic appearance of the ball is effectively improved.
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Description

Technical Field

[0001] The utility model relates to the technical field related to ball production and processing, in particular to a novel roto-molding ball mold. Background Art

[0002] In the production and processing of balls, rotational molding is a common processing method for ball molding. Rotational molding, also known as rotational molding, rotational molding, rotational molding, etc., is a thermoplastic plastic hollow molding method. This method is to add plastic raw materials into a ball mold, and then the ball mold is continuously rotated along two vertical axes and heated. Under the action of gravity and heat energy, the plastic raw materials in the mold are gradually and evenly coated, melted and adhered to the entire surface of the mold cavity, and formed into the required shape, and then cooled and shaped to form a product.

[0003] At present, there are two problems with the roto-molded ball manufacturers in the market. The first is the uneven wall thickness of the balls, which is mainly because the ball mold is heated unevenly during roto-molding, which leads to uneven wall thickness of the produced balls. The second is the problem of too large a parting line of the balls, which is mainly because the PL surface contact is too large and the processing tolerances are not equal when the molds are combined, resulting in the production of The ball’s parting line is too large, affecting the appearance. Utility Model Content

[0004] The purpose of the utility model is to provide a novel roto-molded ball mold, aiming to solve the above-mentioned technical problems. The utility model mainly reduces the thickness of the bottom surface of the positioning column by setting the upper ball side hole and the lower ball side hole, so that the wall thickness of each part of the ball mold is more uniform, thereby allowing the various parts of the ball mold to be heated evenly, thereby producing balls with more uniform wall thickness, effectively improving product quality, and through the setting of the upper ball engaging bevel and the lower ball engaging bevel, the upper ball mold and the lower ball mold are more tightly engaged, reducing the width of the mold line, thereby reducing the mold line marks of the roto-molded ball, and effectively improving the aesthetic appearance of the ball.

[0005] Before processing the balls, an upper ball side hole is provided on the side of the upper ball positioning column of the upper ball mold, and a lower ball side hole is provided on the side of the lower ball positioning column of the lower ball mold. The upper ball side hole and the lower ball side hole can make the heat conduction consistent during the heating process of the mold, reduce the generation of bubbles, and thus make the wall thickness of the produced balls uniform. The connection on the combination mechanism is processed to make the mold line of the ball uniform and beautiful.

[0006] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0007] A novel roto-molding ball mold comprises an upper ball mold and a lower ball mold which are engaged with each other, wherein the mold cavity of the upper ball mold is hemispherical, an upper ball engaging structure is provided at its open end, an upper ball positioning column is provided at its lower top end, and a plurality of upper ball side holes are provided on the side of the upper ball positioning column; the mold cavity of the lower ball mold is hemispherical, a lower ball engaging structure is provided at its open end, a lower ball positioning column is provided at its lower top end, and a plurality of lower ball side holes are provided on the side of the lower ball positioning column.

[0008] Furthermore, the upper ball engaging structure comprises an upper ball engaging support platform and an upper ball engaging groove platform, the upper ball engaging groove platform is arranged on the inner side of the upper ball engaging support platform, and an upper ball engaging inclined surface is arranged between the upper ball engaging support platform and the upper ball engaging groove platform.

[0009] Furthermore, the lower ball engaging structure includes a lower ball engaging support platform and a lower ball engaging boss, the lower ball engaging boss is arranged on the inner side of the lower ball engaging support platform, and a lower ball engaging inclined surface is arranged between the lower ball engaging support platform and the lower ball engaging boss. When it is necessary to perform rotational molding into a ball core, the upper ball mold and the lower ball mold can be engaged through the upper ball engaging structure and the lower ball engaging structure respectively to form a complete ball mold.

[0010] Furthermore, the height and inclination of the upper ball engaging inclined surface and the lower ball engaging inclined surface are both arranged to fit closely. The fitting design can effectively reduce the width of the mold line of the upper ball mold and the lower ball mold, thereby reducing the mold line traces of the rotationally molded ball and effectively improving the appearance of the ball.

[0011] Furthermore, the upper ball engaging support platform is correspondingly arranged with the lower ball engaging support platform, and the table width of the upper ball engaging support platform is equal to the table width of the lower ball engaging support platform; the upper ball engaging groove platform is correspondingly arranged with the lower ball engaging convex platform, and the table width of the upper ball engaging groove platform is equal to the table width of the lower ball engaging convex platform, thereby ensuring that the upper ball mold and the lower ball mold fit more tightly and firmly.

[0012] Furthermore, the wall thickness of the upper ball mold is equal to that of the lower ball mold. When the wall thickness of the upper ball mold is equal to that of the lower ball mold, uniform heating can be ensured, thereby making the wall thickness of the rotationally molded ball uniform.

[0013] Furthermore, a threaded hole is provided in the middle of the upper ball positioning column, and a threaded hole is also provided in the middle of the lower ball positioning column. The provision of the threaded hole facilitates the fixing of the upper ball mold and the lower ball mold. When rotational molding is required, the plastic raw material can be first placed in the lower ball mold, and then the upper ball mold can be tightly clamped on the lower ball mold through the upper ball clamping structure and the lower ball clamping structure to form a complete ball mold, and then the ball mold can be fixed in the corresponding production equipment through the threaded hole for rotational molding.

[0014] Furthermore, the upper ball side hole and the lower ball side hole are through holes with both ends penetrated. The provision of the through holes can effectively reduce the wall thickness at the junction of the upper ball mold and the lower ball mold with the top positioning column, so that the overall wall thickness of the ball mold is uniform, and the wall thickness of the molded ball can be more uniform, thereby effectively improving the quality of the rotationally molded ball and improving the product competitiveness.

[0015] Furthermore, the upper ball mold and the lower ball mold are engaged with each other to form a complete spherical mold, and the inner mold cavity thereof is spherical.

[0016] The automatic correction balancer of the utility model has the following beneficial effects:

[0017] 1. In the roto-molded ball mold of the utility model, an upper ball side hole is provided on the side of the upper ball positioning column, and a lower ball side hole is provided on the side of the lower ball positioning column. The arrangement of the upper ball side hole and the lower ball side hole can effectively reduce the corresponding thickness of the bottom surface of the upper ball positioning column or the lower ball positioning column, so that the overall wall thickness of the upper ball mold and the lower ball mold is more uniform, so that the ball mold can be evenly heated at all places, so that the wall thickness of the roto-molded ball can be more uniform at all places, and the quality of the ball can be effectively improved;

[0018] 2. The utility model roto-molding ball mold has an upper ball clamping inclined surface on the upper ball mold clamping structure, and a lower ball clamping inclined surface on the lower ball clamping structure. The height and inclination of the upper ball clamping inclined surface and the lower ball clamping inclined surface are both adapted and closely arranged, which can effectively reduce the width of the mold line of the upper ball mold and the lower ball mold, thereby reducing the mold line marks of the roto-molded ball, and effectively improving the aesthetic appearance of the ball;

[0019] 3. In the roto-molding ball mold of the utility model, threaded holes are provided in the middle of the upper ball positioning column and the lower ball positioning column. The setting of the threaded holes facilitates the fixing of the upper ball mold and the lower ball mold. When roto-molding is required, the plastic raw material can be first placed in the lower ball mold, and then the upper ball mold can be tightly clamped on the lower ball mold through the upper ball clamping structure and the lower ball clamping structure to form a complete ball mold. The ball mold is then fixed in the corresponding production equipment through the threaded holes for roto-molding. This can facilitate better operation of the robot arm when heating the ball mold, so that the ball mold is heated evenly, and simplifies manual operation to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the roto-molding ball mold of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the lower ball mold of the roto-molding ball mold of the utility model;

[0022] Figure 3 The utility model is a schematic diagram of the internal structure of the upper ball mold of the rotational molding ball mold. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with embodiments and drawings.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] like Figures 1 to 3 As shown, a novel roto-molding ball mold comprises an upper ball mold 1 and a lower ball mold 2 that are engaged with each other, wherein the upper ball mold 1 and the lower ball mold 2 are engaged with each other to form a complete spherical mold, and the inner mold cavity thereof is spherical. The mold cavity of the upper ball mold 1 is hemispherical, and an upper ball engaging structure is provided at its open end, and an upper ball positioning column 3 is provided at its lower top end, and a threaded hole 5 is provided in the middle of the upper ball positioning column 3, and a plurality of upper ball side holes 301 are provided on the side of the upper ball positioning column 3 with both ends penetrating therethrough; the mold cavity of the lower ball mold 2 is hemispherical, and a lower ball engaging structure is provided at its open end, and a lower ball positioning column 401 is provided at its lower top end, and a threaded hole 5 is also provided in the middle of the lower ball positioning column 401, and a plurality of lower ball side holes 401 are provided on the side of the lower ball positioning column 401 with both ends penetrating therethrough. The wall thickness of the upper ball mold 1 is equal to that of the lower ball mold 2.

[0027] It should be noted that: in the present embodiment, the outer shapes of the upper ball mold 1 and the lower ball mold 2 are both hemispherical, and their internal mold cavities are also hemispherical, and the radius of the hemispherical outer shape of the upper ball mold 1 is equal to the radius of the hemispherical outer shape of the lower ball mold 2, and the mold cavity radius of the upper ball mold 1 is also equal to the mold cavity radius of the lower ball mold 2, so that the upper ball mold 1 and the lower ball mold 2 can form a ball mold with a spherical outer shape after being engaged, and its inner cavity can also form a complete spherical mold cavity; in the present embodiment, the number of the upper ball side holes 301 and the lower ball side holes 401 is the same, and both adopt through holes penetrated at both ends, and the number can be 1, 2, 3 or more, so that the thickness of the upper ball positioning column 3 and the lower ball positioning column 401 corresponding to the top of the mold can be closer to the thickness of other parts, thereby making the overall wall thickness of the ball mold uniform and equal, so that the overall heating of the ball mold can be more uniform, and the wall thickness of each part of the rotationally molded ball is also more uniform, thereby effectively improving the quality of the ball and improving the competitiveness of the product.

[0028] like Figure 2 and Figure 3 As shown, the upper ball engaging structure includes an upper ball engaging support platform 101 and an upper ball engaging groove platform 103, the upper ball engaging groove platform 103 is arranged inside the upper ball engaging support platform 101, and an upper ball engaging inclined surface 102 is arranged between the upper ball engaging support platform 101 and the upper ball engaging groove platform 103. The lower ball engaging structure includes a lower ball engaging support platform 203 and a lower ball engaging boss 201, the lower ball engaging boss 201 is arranged inside the lower ball engaging support platform 203, and a lower ball engaging inclined surface 202 is arranged between the lower ball engaging support platform 203 and the lower ball engaging boss 201. The height and inclination of the upper ball engaging inclined surface 102 and the lower ball engaging inclined surface 202 are both adapted and closely arranged. The upper ball engaging support platform 101 is correspondingly arranged to the lower ball engaging support platform 203, and the table width of the upper ball engaging support platform 101 is equal to the table width of the lower ball engaging support platform 203; the upper ball engaging groove platform 103 is correspondingly arranged to the lower ball engaging boss 201, and the table width of the upper ball engaging groove platform 103 is equal to the table width of the lower ball engaging boss 201.

[0029] It should be noted that: in the present embodiment, when the upper ball mold 1 and the lower ball mold 2 are engaged, the upper ball engaging support platform 101 is fitted with the lower ball engaging support platform 203, the upper ball engaging groove platform 103 is fitted correspondingly with the lower ball engaging boss 201, the upper ball engaging inclined surface 102 is concavely arranged inwardly, and the lower ball engaging inclined surface 202 is convexly arranged outwardly. When engaged, the lower ball engaging inclined surface 202 is just fitted into the upper ball engaging inclined surface 102, so that the width of the mold cavity joint line of the upper ball mold 1 and the lower ball mold 2 is reduced, thereby reducing the mold joint line marks of the rotationally molded ball, and effectively improving the aesthetics of the appearance of the ball.

[0030] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any technician familiar with the profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the scope of the technical solution of the utility model, which are all equivalent embodiments of the utility model. At the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A new type of roto-molding ball mold, characterized by: It comprises an upper ball mould and a lower ball mould which engage with each other, the mould cavity of the upper ball mould is hemispherical, an upper ball engaging structure is arranged at its open end, an upper ball positioning column is arranged at its lower top end, and a plurality of upper ball side holes are arranged on the side of the upper ball positioning column; the mould cavity of the lower ball mould is hemispherical, a lower ball engaging structure is arranged at its open end, a lower ball positioning column is arranged at its lower top end, and a plurality of lower ball side holes are arranged on the side of the lower ball positioning column.

2. The novel roto-molding ball mold according to claim 1 is characterized in that: The upper ball engaging structure comprises an upper ball engaging support platform and an upper ball engaging groove platform, wherein the upper ball engaging groove platform is arranged on the inner side of the upper ball engaging support platform, and an upper ball engaging inclined surface is arranged between the upper ball engaging support platform and the upper ball engaging groove platform.

3. The novel roto-molding ball mold according to claim 2 is characterized in that: The lower ball engaging structure comprises a lower ball engaging support platform and a lower ball engaging boss. The lower ball engaging boss is arranged on the inner side of the lower ball engaging support platform. A lower ball engaging inclined surface is arranged between the lower ball engaging support platform and the lower ball engaging boss.

4. The novel roto-molding ball mold according to claim 3 is characterized in that: The height and inclination of the upper ball engaging inclined surface and the lower ball engaging inclined surface are both adapted and closely arranged.

5. The novel roto-molding ball mold according to claim 4 is characterized in that: The upper ball engaging support platform is correspondingly arranged with the lower ball engaging support platform, and the table width of the upper ball engaging support platform is equal to the table width of the lower ball engaging support platform; the upper ball engaging groove platform is correspondingly arranged with the lower ball engaging boss, and the table width of the upper ball engaging groove platform is equal to the table width of the lower ball engaging boss.

6. The novel roto-molding ball mold according to claim 1 is characterized in that: The wall thickness of the upper ball mold is equal to the wall thickness of the lower ball mold.

7. The novel roto-molding ball mold according to claim 1 is characterized in that: A threaded hole is provided in the middle of the upper ball positioning column, and a threaded hole is also provided in the middle of the lower ball positioning column.

8. The novel roto-molding ball mold according to claim 1 is characterized in that: The upper ball side hole and the lower ball side hole are through holes that penetrate at both ends.

9. The novel roto-molding ball mold according to claim 1 is characterized in that: The upper ball mold and the lower ball mold are engaged with each other to form a complete spherical mold, and the inner mold cavity is spherical.