Block structure, method for forming block structure, joint, and toy comprising block structure
By controlling the wall thickness and inner cavity recess design of the building blocks, flow marks on multi-colored joints after injection molding were eliminated, the aesthetic problem was solved, the process was simplified, and costs and time were reduced.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SHANGHAI BLOKS TECHNOLOGY GROUP CO LTD
- Filing Date
- 2025-10-29
- Publication Date
- 2026-06-25
AI Technical Summary
In existing technologies, flow marks are easily generated on the surface of metallic parts after injection molding of multi-color joints, which affects the appearance and increases the cost and time of subsequent spraying.
By controlling the wall thickness of the building blocks within the range of 0.8 to 2 mm, and especially by designing the recessed areas of the inner cavities and the location of the glue inlet, flow marks are eliminated and the aesthetics are improved.
The elimination of the painting process reduces processing costs, shortens processing time, and improves the processing efficiency and aesthetics of the parts.
Smart Images

Figure CN2025130955_25062026_PF_FP_ABST
Abstract
Description
Building block structures, methods for forming building block structures, joints and their toys Technical Field
[0001] This invention relates to the field of toy technology, specifically to a building block structure, a method for forming a building block structure, a joint, and a toy thereof. Background Technology
[0002] In the injection molding process of multi-color joints, flow marks often appear on the surface of the metallic parts after injection molding, affecting the appearance. In order to eliminate the appearance defects caused by flow marks, other post-processing processes such as masking are usually used to cover the metallic flow marks on the surface of the parts, thereby achieving a smooth and mark-free effect on the exterior of the parts. However, spraying after the parts are injection molded increases the processing cost, prolongs the processing time of the parts, and reduces the processing efficiency of the parts. Summary of the Invention
[0003] In view of the deficiencies in the prior art, the purpose of this invention is to provide a building block structure, a method for molding the building block structure, a joint, and a toy thereof.
[0004] According to the present invention, a modular structure includes modular parts, wherein the wall thickness of the modular parts after injection molding is partially or entirely controlled within the range of 0.8 to 2 mm.
[0005] According to a method for molding a building block structure provided by the present invention, the wall thickness of the injection-molded building block is partially or entirely controlled within the range of 0.8 to 2 mm.
[0006] Preferably, the wall thickness is partially or entirely controlled within the range of 0.8 to 1.8 mm.
[0007] Preferably, the wall thickness is partially or entirely controlled within the range of 0.8 to 1.5 mm.
[0008] Preferably, the wall thickness is partially or entirely controlled within the range of 1 to 1.5 mm.
[0009] Preferably, the building block has an inner cavity, and the inner cavity and the outer surface of the building block form the wall thickness; or
[0010] The building blocks are plate-shaped structures.
[0011] Preferably, the inner cavity has an opening and communicates with the outside through the opening.
[0012] Preferably, the inner cavity forms a splicing hole.
[0013] Preferably, the building block has a cylindrical structure.
[0014] Preferably, the opening has a notch extending radially outward.
[0015] Preferably, the maximum width of the notch is in the range of 1 to 2.5 mm.
[0016] Preferably, the cross-section of the notch is a tangent circle or an arc.
[0017] Preferably, the injection port of the injection-molded building block is directly opposite the recess.
[0018] Preferably, the notch extends along the block from the opening to the bottom of the inner cavity.
[0019] A joint according to the present invention includes the aforementioned modular structure.
[0020] A toy according to the present invention includes the aforementioned building block structure.
[0021] Compared with the prior art, the present invention has the following beneficial effects:
[0022] 1. By controlling the wall thickness of the building blocks to be partially or entirely within the range of 0.8 to 2 mm, this invention eliminates subsequent processing processes such as spraying, removes flow marks on the exterior of the building blocks, reduces processing costs, shortens processing time, and improves processing efficiency.
[0023] 2. In this invention, a notch is provided on one side of the inner cavity of the building block, and the injection port of the injection-molded building block is directly opposite the notch. By controlling the width of the notch and the thickness of the building block corresponding to the notch, it is beneficial to eliminate flow marks on the outside of the building block and improve the aesthetics of the parts. Attached Figure Description
[0024] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0025] Figure 1 is a top view of the structure of the building blocks in this invention;
[0026] Figure 2 is a schematic diagram of the external effect of the molded building block in this invention;
[0027] Figure 3 is a top view of the structure of building blocks in the prior art;
[0028] Figure 4 is a schematic diagram of the external effect of the molded building block in the prior art;
[0029] Figure 5 is a schematic diagram of the structure when the joint is connected to the injection molding channel in this invention;
[0030] Figure 6 is a top view of Figure 5.
[0031] The diagram shows: Building block 1, splicing hole 11, notch 111, glue inlet 2. Detailed Implementation
[0032] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.
[0033] Example 1:
[0034] This invention provides a building block structure, including a building block 1. The wall thickness of the injection-molded building block 1 is controlled within the range of 0.8 to 2 mm. By controlling the overall wall thickness of the building block 1 within the range of 0.8 to 2 mm, the metallic flow marks on the outer surface of the injection-molded building block 1 disappear, greatly improving the aesthetic appearance of the building block 1.
[0035] In practical applications, the wall thickness of the building block 1 can be, for example, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., with 1.5 mm being the preferred thickness.
[0036] The present invention also provides a method for molding a building block structure, so that the wall thickness of the injection-molded building block 1 is controlled within the range of 0.8 to 2 mm.
[0037] Specifically, the building block 1 has an inner cavity, which forms a wall thickness with the outer surface of the building block 1. The inner cavity has an opening, which communicates with the outside. In practical applications, the inner cavity can realize the function of the splicing hole 11. The building block 1 is preferably a cylindrical structure. By controlling the wall thickness of the building block 1, the influence of flow marks on the external appearance of the part is eliminated, and the appearance of the part is improved, as shown in Figure 2.
[0038] The present invention also provides a joint, including a block structure. The joint adopts the block structure of the present invention and is a multi-colored joint, as shown in Figures 5 and 6. This can simplify the manufacturing process, improve processing efficiency, and reduce production costs.
[0039] The present invention also provides a toy, including a building block structure.
[0040] Example 2:
[0041] This embodiment provides a building block structure, including a building block part 1. Unlike embodiment 1, the wall thickness of the injection-molded building block part 1 is controlled within the range of 0.8 to 2 mm.
[0042] Since the overall thickness of the building block 1 is in the range of 2.2 to 3 mm, the flow marks on the outside of the building block 1 are relatively serious. In order to solve the above problem, the opening is provided with a notch 111 extending in the radial outward direction. The wall thickness L corresponding to the notch 111 of the building block 1 is 1.97 mm, as shown in Figure 1. The cross-section of the notch 111 is preferably a tangent circle or an arc shape. The injection port 2 of the injection-molded building block 1 is directly opposite the notch 111. The notch 111 extends along the building block 1 from the opening to the bottom of the inner cavity. In this embodiment, by controlling the wall thickness at the notch 111, the metallic flow marks on the outer surface of the building block 1 are eliminated, which greatly improves the aesthetics of the outer surface of the part.
[0043] It should be noted that the thickness L of the building block 1 corresponding to the notch 111 is preferably 0.8 to 1.5 mm, for example, L is 1 mm, 1.2 mm, etc.
[0044] In this embodiment, the wider the notch 111, the better the effect of eliminating flow marks on the outer surface of the building block 1. However, if the notch 111 is too wide, it will affect the function of the splicing hole 11 and reduce the firmness of the building blocks spliced into the splicing hole 11. In order to ensure the splicing function of the splicing hole 11 and eliminate flow marks on the outer surface of the building block 1, the maximum width M of the notch 111 should be within the range of 1 to 2.5 mm, for example, 1.5 mm, 1.8 mm, 2 mm, etc. By controlling the width of the notch 111, the glue reduction function can also be achieved inside the injection molded building block 1, so that the wall thickness of part of the building block 1 (the thickness L of the building block 1 corresponding to the notch 111) meets the range of 0.8 to 2 mm, preferably L is 0.8 to 1.5 mm, which is beneficial to eliminating metallic flow marks on the outer surface of the building block 1. At the same time, the glue inlet 2 of the injection molded building block 1 is directly opposite the notch 111, which is also beneficial to the aesthetics of the outer surface of the building block 1.
[0045] Example 3:
[0046] The difference between this embodiment and embodiment 1 is that the building block 1 is a plate-shaped structure. By controlling the wall thickness of the plate-shaped building block 1, the flow marks on the outer surface can also be controlled, achieving a smooth and beautiful external effect.
[0047] In this embodiment, the plate-like structure can be a cuboid structure, an arc-shaped plate structure, an irregularly shaped plate, etc. All of them can control the flow marks on the outer surface after injection molding by controlling the wall thickness, thereby improving the aesthetics of the parts.
[0048] Comparative example:
[0049] As shown in Figure 3, the wall thickness of the building block 1 is N, and N is 2.53 mm. After injection molding, obvious flow marks appear on the outside of the building block 1, as shown in Figure 4, which greatly reduces the aesthetics of the part.
[0050] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0051] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.
Claims
1. A building construction, characterized by comprising: Including building block (1), the wall thickness of the injection-molded building block (1) is partially or entirely controlled within the range of 0.8 to 2 mm.
2. A method of forming a building block construction, characterized by, The wall thickness of the injection-molded building block (1) is partially or entirely controlled within the range of 0.8 to 2 mm.
3. The building structure or method of claim 1 or 2, wherein The wall thickness is partially or entirely controlled within the range of 0.8 to 1.8 mm. Preferably, the wall thickness is partially or entirely controlled within the range of 0.8 to 1.5 mm. More preferably, the wall thickness is partially or entirely controlled within the range of 1 to 1.5 mm.
4. The building structure or method of claim 1, wherein The building block (1) has an inner cavity, the inner cavity forming the wall thickness with the outer surface of the building block (1); or The building block (1) has a plate-like structure.
5. The building structure or method according to claim 4, wherein The inner cavity has an opening and communicates with the outside through the opening. Preferably, the inner cavity forms a splicing hole (11). Preferably, the building block (1) has a cylindrical structure.
6. The building structure of claim 1 or the method of claim 2, wherein, The building block (1) has an inner cavity with an opening that communicates with the outside. The opening has a notch (111) extending radially outward. Preferably, the inner cavity forms a splicing hole (111). Preferably, the maximum width of the notch (111) is in the range of 1 to 2.5 mm. Preferably, the cross-section of the notch (111) is tangent circular or arc-shaped. Preferably, the building block (1) has a cylindrical structure.
7. The building structure or method according to claim 6, wherein The injection port (2) of the injection-molded building block (1) is directly opposite the recess (111).
8. The building structure or method according to claim 6, wherein The notch (111) extends along the block (1) from the opening to the bottom of the inner cavity. Preferably, the thickness from the opening to the outer surface of the block (1) is controlled within the range of 0.8 to 2 mm.
9. A joint, characterized by Includes the building block structure as described in any one of claims 1 to 8.
10. A toy characterized by Includes the building block structure as described in any one of claims 1 to 8.