Building blocks, toy, toy injection mold and method

Abstract

The present application relates to the technical field of toy molding, and provides a building block, a toy, a toy injection mold and a method, the toy injection mold adopts injection fluid mixed with functional particles, and comprises a runner and a cavity connected with the runner; flow disturbance is applied to the injection fluid in the process of the injection fluid entering the cavity from the runner, and the flow disturbance is realized by at least one of the following modes: a barrier arranged in the runner, a barrier in the cavity, and the injection fluid being obliquely impacted on the cavity wall. By applying flow disturbance to the injection fluid in the runner or the cavity, the present application effectively suppresses the trace problem, improves the surface appearance of the toy, and increases the interestingness of the toy.

Description

Technical Field

[0001] This invention relates to the field of toy molding technology, specifically to a building block, a toy, a toy injection mold, and a method thereof. Background Technology

[0002] As consumer demand for the appearance and texture of toys continues to rise, in order to give the surface of injection-molded products a special appearance effect such as metallic luster and frosted metallic texture, and to meet the diverse aesthetic needs of consumers, the industry generally adopts the technique of adding a certain proportion of metal powder to the injection molding raw materials. Through the uniform distribution of metal powder on the surface of injection-molded parts, toy products are given a visual texture and decorative quality that distinguishes them from ordinary injection-molded parts, which significantly enhances the market competitiveness of toys.

[0003] Currently, in the injection molding process of metal powder-added toys, metal powder is usually mixed with plastic substrate to form injection molding material. The molten injection fluid is then injected into the mold cavity using an injection molding machine, and after cooling and molding, a toy product with a special appearance is obtained. However, in actual injection molding production, due to the viscosity of the injection fluid itself, and the addition of metal powder altering its flow characteristics to some extent, the metal powder distribution in the injection fluid is easily uneven due to factors such as injection pressure, flow resistance, and mold structure. Simultaneously, flow marks and turbulence marks generated during the flow process will remain on the surface of the molded part, forming obvious defects such as… Figure 3 , Figure 5 , Figure 9 As shown, this damages the uniform appearance and texture that the metal powder imparts to the toy, severely affecting the surface smoothness and aesthetics of the toy product, reducing the product qualification rate, and increasing the rework costs and material losses for the manufacturing company.

[0004] In the existing technology, the problem of surface marks on injection molded parts is usually addressed by adjusting the injection pressure, optimizing the mold temperature, or adding lubricant. However, these methods are mainly applicable to ordinary injection molded parts without added metal powder. For toy injection molded parts with added metal powder, due to factors such as the compatibility and density differences between the metal powder and the plastic substrate, the above-mentioned process adjustment methods are difficult to effectively suppress the problem of injection fluid marks and cannot meet the stringent requirements for surface appearance quality of toy products.

[0005] Therefore, how to solve the problem of surface marks caused by metal powder additives in the injection molding process of toys, and improve the surface quality and pass rate of toy injection molded parts, has become an urgent technical problem to be solved in the current toy injection molding processing field. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the purpose of this invention is to provide building blocks, toys, toy injection molds and methods.

[0007] According to the present invention, a toy injection mold is provided, which uses an injection fluid containing functional particles and includes a cavity connected to a flow channel. A flow disturbance is applied to the injection fluid as it enters the cavity from the flow channel.

[0008] According to a toy injection molding method provided by the present invention, an injection fluid containing functional particles is used to apply flow disturbance to the injection fluid as it enters the mold cavity from the flow channel.

[0009] Preferably, the flow disturbance is achieved by at least one of the following methods: a blockage disposed in the flow channel, a blockage disposed in the cavity, or causing the injection fluid to tilt and impact the cavity wall.

[0010] Preferably, the obstruction disposed in the flow channel is a sprue needle in the mold; The end of the nozzle needle extends into the flow channel.

[0011] Preferably, the sprue needle is positioned 5-8 mm away from the glue inlet.

[0012] Preferably, the obstruction disposed within the cavity is an insert in the mold; The end of the insert extends into the cavity.

[0013] Preferably, the insert is positioned at a distance of 1 to 1.8 mm from the glue inlet.

[0014] Preferably, the cavity has a functional cavity on the side near the flow channel, and the functional cavity is spherical, hemispherical, ellipsoidal, cylindrical, conical, or frustum-shaped.

[0015] Preferably, the direction of the glue inlet of the flow channel is configured at an angle to the tangent of the corresponding point on the cavity.

[0016] Preferably, the included angle is 30° to 60°.

[0017] Preferably, the included angle is 40° to 50°.

[0018] Preferably, the included angle is 45°.

[0019] Preferably, the inlet for the flow channel entering the cavity is a flat opening, the width of which is 0.6-1 mm and the thickness is 0.6-0.8 mm.

[0020] Preferably, the inlet for the flow channel entering the cavity is a round opening with an inner diameter of 0.6 to 0.8 mm.

[0021] Preferably, the mold is provided with a hole punch, the end of which is flat.

[0022] Preferably, the functional particles are metal powders.

[0023] According to the present invention, a building block is molded using the toy injection mold or the toy injection molding method described above.

[0024] A toy according to the present invention includes the aforementioned building blocks.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention applies flow disturbance to the injection fluid entering the cavity by setting obstructions in the flow channel, setting obstructions in the cavity, and tilting the injection fluid to impact the cavity wall. This can effectively suppress the problem of leaving marks, improve the surface appearance of toys, and increase the fun of toys.

[0026] 2. This invention effectively suppresses the problem of leaving marks by setting the end of the hole punch to a flat surface and designing a structure that does not conform to the surface of the product. The structure is simple and easy to implement.

[0027] 3. This invention effectively suppresses the problem of residue by improving the size of the glue inlet, and has good versatility. Attached Figure Description

[0028] 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: Figure 1 This is a schematic diagram of the structure of the product connected to the runner in Example 2. In this diagram, the dashed line L is the glue injection direction line of the runner, and the dashed line M is the tangential plane (cut surface) at the intersection of the glue injection direction of the runner and the corresponding point on the cavity. The cut surface is perpendicular to the paper direction. Figure 2 This is a schematic diagram of the structure in Example 3 showing the product connected to the flow channel; Figure 3 This is a schematic diagram of the product appearance in Comparative Example 1; Figure 4 This is a schematic diagram of the product appearance in Example 5; Figure 5 This is a schematic diagram of the product appearance in Comparative Example 2; Figure 6 This is a schematic diagram of the planar structure at the end of the hole-holding needle in Example 6; Figure 7 This is a schematic diagram of the product appearance in Example 6; Figure 8 This is a schematic diagram of the external shape of the end structure of the hole-holding needle in Example 3; Figure 9 This is a schematic diagram of the product appearance in Comparative Example 3; Figure 10This is a schematic diagram of the appearance of the product in Example 4; Figure 11 This is a schematic diagram of the appearance of the product in Comparative Example 4; Figure 12 This is a schematic diagram of the appearance of the product in Example 7; Figure 13 This is a schematic diagram of the appearance of the product in Comparative Example 5; Figure 14 This is a schematic diagram of the appearance of the product in Example 8; Figure 15 This is a schematic diagram of the appearance of the product in Comparative Example 6.

[0029] The diagram shows: Flow channel 1; Blocking space 11; Inlet 12; Cavity 2; 3. Product 4; End portion 41. Detailed Implementation

[0030] 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 scope of protection of the present invention.

[0031] Example 1: To address the issue of surface marks on products caused by the surging and tumbling of injection fluid, this invention provides a toy injection mold. During injection, an injection fluid containing functional particles, preferably metal powder, is used. The mold includes a flow channel 1 and a cavity 2. The flow channel 1 connects to the cavity 2. During injection, the injection fluid enters the cavity 2 through the flow channel 1. During the process of the injection fluid entering the cavity 2 from the flow channel 1, flow disturbance is applied to the injection fluid. This flow disturbance is achieved through at least one of the following methods: a blockage disposed within the flow channel 1, a blockage disposed within the cavity 2, or causing the injection fluid to tilt and impact the cavity wall.

[0032] The present invention also provides a toy injection molding method, which uses an injection fluid containing functional particles. During the process of the injection fluid entering the cavity 2 from the flow channel 1, the flow disturbance is applied to the injection fluid. The flow disturbance is achieved by at least one of the following methods: a block provided in the flow channel 1, a block provided in the cavity 2, or causing the injection fluid to tilt and impact the cavity wall.

[0033] It is important to note that applying flow-retarding measures to the injection fluid before it enters cavity 2, applying flow-retarding measures to the injection fluid after it enters cavity 2, or changing the injection angle so that the flow state of the injection fluid is altered by the structure of cavity 2 itself after entering cavity 2, can effectively suppress the formation of marks and increase the surface aesthetics of product 4.

[0034] The present invention also provides a building block, which is molded using a toy injection mold or a toy injection molding method.

[0035] The present invention also provides a toy, including building blocks.

[0036] Example 2: This embodiment is a preferred embodiment. The flow channel 1 has a blocking space 11, and the blocking element is a sprue needle in the mold. The end of the sprue needle extends into the blocking space 11. When the injection fluid flows from the flow channel 1 through the sprue needle, it is blocked by the sprue needle, and the flow direction of the injection fluid is changed. Experiments have verified that there are no obvious marks on the product appearance. Figure 1 As shown.

[0037] It should be noted that the obstruction is positioned at a distance of approximately 5 to 8 mm from the glue inlet, such as approximately 6 mm or 7 mm from the glue inlet.

[0038] Specifically, the cavity 2 has a functional cavity on the side near the flow channel 1. The functional cavity is preferably spherical, hemispherical, ellipsoidal, cylindrical, conical, or frustum-shaped. The functional cavity corresponds to part or all of the product 4. For example, the functional cavity corresponds to the end part 41 of the product 4. The flow channel 1 is directly connected to the functional cavity. The glue injection direction of the flow channel 1 forms an angle θ with the tangent of the corresponding point on the functional cavity. The point where the extension line of the glue injection direction of the flow channel 1 intersects the functional cavity is the corresponding point. The angle θ is 30° to 60°. The angle θ can be any value from 30° to 60°, such as 35°, 40°, 45°, 50°, 55°, etc.

[0039] Furthermore, the end portion 41 is cylindrical, and the cylindrical portion of the product corresponds to the cylindrical space in the cavity 2. The injection direction of the flow channel 1 is set at a 45° angle with the tangent of the corresponding point of the end portion 41, so that the flow direction of the injection fluid is at an angle of less than 90° with the tangent of the corresponding point on the functional cavity. When the injection fluid enters the functional cavity, it first hits the inner wall of the cylinder, which changes the flow direction of the injection fluid and generates fluid disturbance. This makes the metal powder more uniform in the injection fluid and reduces the probability of appearance marks.

[0040] like Figure 1As shown, the inlet 12 of the flow channel 1 into the cavity 2 is a round opening with an inner diameter of 0.6 to 0.8 mm, such as 0.7 mm or 0.8 mm. By increasing the diameter of the inlet 12, the resistance to molten glue can be reduced, and stable filling can be achieved.

[0041] Example 3: The difference between this embodiment and embodiment 2 is that the obstruction in channel 1 is omitted, and the glue injection direction of channel 1 is set at a 45° angle to the tangent of the corresponding point on the end portion 41. Figure 2 As shown, this also achieves the effect of reducing appearance marks as described in this invention.

[0042] Example 4: The difference between this embodiment and embodiment 2 is that the inlet 12 of the flow channel 1 into the cavity 2 is a flat opening with a width of 0.6 to 1 mm and a thickness of 0.6 to 0.8 mm.

[0043] In this embodiment, the width of the inlet 12 of the flow channel 1 entering the cavity 2 is preferably 0.9 mm, and the thickness is preferably 0.7 mm. The molded product 4 has no visible marks, such as... Figure 10 As shown.

[0044] Example 5: The difference between this embodiment and embodiment 2 is that the end portion 41 is ellipsoidal, and the glue injection direction of the flow channel 1 forms a 45° angle with the tangent of the corresponding point on the end portion 41. Figure 4 As shown, the surface of product 4 after injection molding has no obvious marks, which improves the aesthetic effect.

[0045] In practical applications, the end portion 41 can also be set to a spherical shape, so that the surface of the injection-molded product 4 can also achieve the effect of no obvious marks and beautiful appearance.

[0046] Example 6: The difference between this embodiment and embodiment 2 is that a hole-splitter 3 is provided on the mold, and the end of the hole-splitter 3 extends into the cavity 2. In order to mold the hole structure on the product 4, the end of the hole-splitter 3 is configured as a plane, such as... Figure 6 As shown, this method can solve the problem of being unable to suppress particle orientation marks on the surface of injection molded products.

[0047] Product 4, molded using the method described in this embodiment, has no obvious marks on its surface, such as... Figure 7 As shown, it has an attractive appearance.

[0048] Example 7: This embodiment is a preferred embodiment. In this embodiment, the glue inlet 12 is a round opening with a diameter of 0.7 mm. The molded product 4 has no marks on its surface and has a good appearance. Figure 12 As shown.

[0049] Example 8: This embodiment is a preferred embodiment. The flow channel 1 is connected to the cavity 2 through the inlet 12. An insert is disposed in the mold, and the end of the insert extends into the cavity 2. The insert acts as a barrier, such as... Figure 14 As shown, by setting the insert, when the injection fluid enters the cavity 2 from the flow channel 1, it is blocked by the insert, and the flow of the injection fluid is disturbed, which changes the flow state. Experiments have verified that there are no obvious marks on the product appearance, which improves the aesthetics of product 4.

[0050] In this embodiment, the distance between the insert and the glue inlet 12 is preferably 1 to 1.8 mm.

[0051] Comparative Example 1: In Comparative Example 1, no obstructions are placed inside the flow channel 1, and the glue inlet direction of the flow channel 1 is parallel to the axis of the functional cavity, such as... Figure 3 As shown, the outer surface of product 4 has severe snake-like marks.

[0052] Comparative Example 2: In Comparative Example 2, the end portion 41 is spherical, and the glue injection direction of the flow channel 1 is parallel to the axis of the end portion 41, as shown below. Figure 5 As shown, compared to Example 5, the surface of Product 4 after injection molding has obvious marks, which reduces its appeal.

[0053] Comparative Example 3: In Comparative Example 3, the mold is equipped with a hole punch 3. The end of the hole punch 3 is designed to follow the outer surface of the product 4. The end of the hole punch 3 is a beveled surface or a curved surface, such as... Figure 8 As shown, the shape of the end of the ejector pin 3 affects the appearance of the product 4 during the injection molding process.

[0054] Product 4, molded using this comparative method, shows obvious surface marks, such as... Figure 9 As shown, compared to Example 6, the appearance is less attractive, which reduces the product's appeal.

[0055] Comparative Example 4: In Comparative Example 4, the sprue 12 of the runner 1 into the cavity 2 is a flat opening with a width of 0.5 mm and a thickness of 0.4 mm. The molded product 4 shows obvious marks on its appearance, such as... Figure 11 As shown.

[0056] Comparative Example 5: In Comparative Example 5, the sprue 12 of the runner 1 into the cavity 2 is a round opening with a diameter of 0.5 mm. The molded product 4 shows obvious marks on its appearance, such as... Figure 13 As shown.

[0057] Comparative Example 6: In Comparative Example 6, the runner 1 connects to the cavity 2 via the gate 12. No obstructions are placed within the cavity. The wall thickness of the product at the gate 12 is 2.5 mm. The molded product 4 exhibits obvious marks on its appearance, such as... Figure 15 As shown.

[0058] Taking Example 2 as an example, the working principle of the present invention is as follows: During the process of injection fluid entering cavity 2 from runner 1, due to the presence of sprue needles in the mold, the ends of the sprue needles extend into the runner to form obstructions. The ends of the sprue needles are located approximately 6.5 mm from the gate 12. When the injection fluid flows to the end of the sprue needle, it is obstructed, which changes the normal flow state and causes turbulence inside the injection fluid. The metal powder becomes more uniform in the injection fluid. When the injection fluid enters the functional cavity through the gate 12, it impacts the inner wall of the functional cavity along a straight flow path, changing its flow direction and deviating from the straight flow path, thus generating fluid turbulence again. This can change the flow state of the injection fluid again, reducing the probability of surface marks.

[0059] 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.

[0060] 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 toy injection mold, characterized in that, The injection fluid containing functional particles is used, including a flow channel (1) and a cavity (2) connected to the flow channel (1). A flow disturbance is applied to the injection fluid as it enters the cavity (2) from the flow channel (1).

2. A toy injection molding method, characterized in that, An injection fluid containing functional particles is used to apply flow disturbance to the injection fluid as it enters the cavity (2) from the flow channel (1).

3. The toy injection mold according to claim 1 or the toy injection molding method according to claim 2, characterized in that, The flow disturbance is achieved by at least one of the following methods: a blockage provided in the flow channel (1), a blockage provided in the cavity (2), or causing the injection fluid to tilt and impact the cavity wall.

4. The toy injection mold or the toy injection molding method according to claim 3, characterized in that, The obstruction disposed within the flow channel (1) is the sprue needle in the mold; The end of the sprue needle extends into the flow channel (1). Preferably, the sprue needle is positioned 5-8 mm away from the injection port (12). Preferably, the obstruction disposed within the cavity (2) is an insert in the mold; The end of the insert extends into the cavity (2). Preferably, the insert is positioned at a distance of 1 to 1.8 mm from the glue inlet (12).

5. The toy injection mold or the toy injection molding method according to claim 3, characterized in that, The cavity (2) has a functional cavity on the side near the flow channel (1), and the functional cavity is spherical, hemispherical, ellipsoidal, cylindrical, conical, or frustum-shaped. Preferably, the glue injection direction of the flow channel (1) is arranged at an angle to the tangent of the corresponding point on the cavity (2). Preferably, the angle is 30° to 60°. Preferably, the included angle is 40° to 50°. Preferably, the included angle is 45°.

6. The toy injection mold according to claim 1 or the toy injection molding method according to claim 2, characterized in that, The mold is equipped with a hole punch (3), the end of which is flat.

7. The toy injection mold according to claim 1 or the toy injection molding method according to claim 2, characterized in that, The inlet (12) through which the flow channel (1) enters the cavity (2) is a flat opening with a width of 0.6-1 mm and a thickness of 0.6-0.8 mm. Preferably, the inlet (12) through which the flow channel (1) enters the cavity (2) is a round opening with an inner diameter of 0.6-0.8 mm.

8. The toy injection mold according to claim 1 or the toy injection molding method according to claim 2, characterized in that, The functional particles are metal powders.

9. A type of building block, characterized in that, The toy is molded using any one of claims 1, 3 to 8, or using any one of claims 2 to 8.

10. A toy, characterized in that, Includes the building blocks as described in claim 9.

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