A pattern-controllable injection mold

Abstract

The application discloses a controllable pattern injection mold, and relates to the technical field of injection molds, which comprises a mold cavity and an injection runner in communication with the mold cavity, and a pattern forming part is arranged in the mold cavity and / or the injection runner. The controllable pattern injection mold can control the pattern forming process, can form specific patterns, and can reduce production cost and make the production process more environmentally friendly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to a pattern controllable injection mold. BACKGROUND

[0002] At present, plastics are widely used, and plastics with color paint are often used. In addition, the surface of some plastic parts needs to be sprayed with patterns. For such plastic parts, a single-color injection molding machine can be used to form a specific pattern on the surface of the injection molded part by spraying. However, the spraying technology not only increases the production cost, but also pollutes the environment and has adverse effects on the health of workers. In addition, a double-color (multi-color) injection molding machine can also be used to inject two (or more) colors of plasticizing fluid into the mold cavity to obtain an injection molded part with a simple third color or pattern. However, the pattern forming process in the mold cavity and the mold runner of the double-color (multi-color) injection molding machine is uncontrollable, and a product with a specific pattern cannot be obtained. SUMMARY

[0003] The purpose of the present application is to provide a pattern controllable injection mold to solve the problems existing in the prior art. The pattern forming process is controllable, and a specific pattern can be formed by injection molding. In addition, the production cost is reduced, and the production process is more environmentally friendly.

[0004] To achieve the above purpose, the present application provides the following solutions:

[0005] The present application provides a pattern controllable injection mold, which comprises a mold cavity and an injection flow channel communicating with the mold cavity, and a pattern forming part is arranged in the mold cavity and / or the injection flow channel.

[0006] Preferably, the pattern forming part comprises at least one of a pattern forming block, a pattern forming pit and a local forming area; the pattern forming block and the pattern forming pit are arranged on the inner surface of the mold cavity and / or the injection flow channel, and the local forming area constitutes a part of the mold cavity and / or the injection flow channel; the height of the pattern forming block arranged in the mold cavity is less than the forming thickness of the mold cavity, the height of the pattern forming block arranged in the injection flow channel does not exceed the flow channel height of the injection flow channel, and the forming thickness of the local forming area is different from the forming thickness of the surrounding area.

[0007] Preferably, the pattern forming block is adjustably arranged on the inner surface of the mold cavity and / or the injection flow channel.

[0008] Preferably, the telescopic adjustment of the pattern forming block can make the pattern forming block protrude from or sink into the inner surface of the mold cavity and / or the injection flow channel to form the pattern forming recess.

[0009] Preferably, the rotational adjustment of the pattern forming block can change the orientation of the pattern forming block.

[0010] Preferably, the pattern forming block, the pattern forming recess and the local forming area are of any shape.

[0011] Preferably, the pattern forming block comprises at least one of a cylinder, a triangular column, a semi-cylinder, an elliptical column and a crescent-shaped column, and the pattern forming recess comprises at least one of a cylindrical recess, a triangular column-shaped recess, a semi-cylindrical recess, an elliptical column-shaped recess and a crescent-shaped column-shaped recess.

[0012] Preferably, the pattern forming block comprises at least one of an isometric pattern forming block and a gradually changing height pattern forming block, and the pattern forming recess comprises at least one of an isometric recess and a gradually changing depth recess.

[0013] Preferably, the pattern forming block surface is provided with a secondary pattern forming part, and the secondary pattern forming part comprises a secondary pattern forming protrusion and / or a secondary pattern forming recess.

[0014] Preferably, the secondary pattern forming protrusion and the secondary pattern forming recess are of any shape.

[0015] The present application has the following technical effects relative to the prior art:

[0016] The present application provides a pattern-controllable injection mold. During the injection flow process of the plasticizing fluid, the flow direction of the fluid will change under the action of the pattern forming part after the fluid encounters the pattern forming part, and the different color injection fluids in the fluid will also be mixed and transposed. After the transposed fluid is changed to the plastic part forming surface and the front surface, the injection molding is performed, so that different colors and patterns are formed on the injection part forming surface and the front surface. According to different requirements of the pattern, different shapes and positions of the pattern forming part can be selectively arranged in the mold cavity and / or the injection flow channel, so that a specific pattern can be injection molded, the drawbacks of high production cost and environmental pollution of the traditional spraying method are avoided, the injection part with a specific pattern can be directly injection molded by using the mold, the pattern forming process is controllable, not only the production cost is reduced, but also the production process is more environmentally friendly. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 Fig. 2 is a schematic diagram of the formed pattern when the pattern forming block is an arc-shaped column and the arc-shaped column is provided with two-stage pattern forming protrusions in the present application;

[0019] Figure 2 Fig. 3 is a schematic diagram of the formed pattern when the pattern forming block is a crescent-shaped column in the present application;

[0020] Figure 3 Fig. 4 is a schematic diagram of the formed pattern when the pattern forming block is a cylindrical column in the present application;

[0021] Figure 4 Fig. 5 is a schematic diagram of the formed pattern when the pattern forming block is a combined structure in the present application;

[0022] In the figure: 1-pattern forming block, 2-two-stage pattern forming protrusions. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] The purpose of the present application is to provide a pattern-controllable injection mold to solve the problems in the prior art. The pattern forming process is controllable, and a specific pattern can be formed by injection molding. The production cost is reduced, and the production process is more environmentally friendly.

[0025] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0026] The present embodiment provides a pattern-controllable injection mold, which comprises a mold cavity and an injection flow channel communicated with the mold cavity. The mold cavity and / or the injection flow channel is provided with a pattern forming part.

[0027] During the flow of the plasticized fluid into the mold cavity, upon encountering the pattern forming part, the flow direction of the fluid changes under the action of the pattern forming part. Different colored injection fluids in the fluid also mix and exchange positions. The exchanged fluids are then transferred to the forming surface and front side of the plastic part. After injection molding, different colors and patterns are formed on the forming surface and front side of the injection molded part. According to different pattern requirements, pattern forming parts of different shapes and positions can be selectively set in the mold cavity and / or injection runner, thereby enabling the injection molding of specific patterns. This avoids the disadvantages of high production costs and environmental pollution caused by traditional spraying methods. Using this mold, injection molded parts with specific patterns can be directly injection molded. The pattern forming process is controllable, which not only reduces production costs but also makes the production process more environmentally friendly.

[0028] In some embodiments, the pattern forming part includes at least one of a pattern forming block 1, a pattern forming recess, and a partial forming area; the pattern forming block 1 and the pattern forming recess are disposed on the inner surface of the mold cavity and / or the injection runner, and the partial forming area constitutes part of the mold cavity and / or the injection runner; the height of the pattern forming block 1 disposed in the mold cavity is less than the forming thickness of the mold cavity, the height of the pattern forming block 1 disposed in the injection runner does not exceed the runner height of the injection runner, and the forming thickness of the partial forming area is different from the forming thickness of its surrounding area. Pattern forming blocks 1 and / or pattern forming recesses can be set in the mold cavity, or in the injection runner, or simultaneously in the mold cavity and injection runner. The number of pattern forming blocks 1 and / or pattern forming recesses is not limited. Depending on the actual pattern shape required, different numbers and positions of pattern forming blocks 1 and / or pattern forming recesses can be selectively set. When the plasticizing fluid passes through the pattern forming blocks 1 and pattern forming recesses, the flow direction will change, and different colors of injection fluid in the fluid will also mix and change position, thereby forming different colors and patterns on the molding surface and front side of the injection molded part. Local molding zones can be set independently in the mold cavity or injection runner, or simultaneously in both the mold cavity and injection runner. The number of local molding zones is not limited. Depending on the actual needs and pattern shape, different numbers and positions of local molding zones can be selectively set. The molding thickness of the local molding zone is greater or less than the molding thickness of its surrounding area. This causes the plastic fluid to change its flow direction when passing through the local molding zone, and different colors of injection fluid in the fluid will also mix and exchange positions, thus forming different colors and patterns on the molding surface and front side of the injection molded part.

[0029] In some embodiments, the pattern forming block 1 can be adjusted to be disposed on the inner surface of the mold cavity and / or injection channel. By adjusting the pattern forming block 1, the contact surface between the plasticizing fluid and the pattern forming block 1 in the flow direction can be changed, so that the flow direction of the fluid can change with the change of the pattern forming block 1, thereby generating different patterns.

[0030] In some embodiments, the telescopic adjustable pattern forming block 1 can protrude from the inner surface of the mold cavity and / or injection runner, or sink into the inner surface of the mold cavity and / or injection runner to form a pattern forming recess. The telescopic adjustment of the pattern forming block 1 can be driven pneumatically or hydraulically to change its relative distance to the inner surface of the mold cavity and / or injection runner. The pneumatic or hydraulic drive device can be controlled by a solenoid valve. During injection molding, the pattern forming block 1 can extend outward from the inner surface of the mold cavity to generate patterns. The protrusion height of the pattern forming block 1 can also be adjusted in real time during injection molding to form different patterns. After the mold cavity is filled, the pattern forming block 1 can be retracted to be flush with the surface of the mold cavity, so that no recesses appear on the surface of the molded part. If the pattern forming block 1 does not affect the product quality and appearance of the molded part, it may not need to be retracted.

[0031] In some embodiments, rotating the pattern forming block 1 can change the orientation of the pattern forming block 1, thereby changing the contact surface between the plasticizing fluid and the pattern forming block 1 in the flow direction. Specifically, the pattern forming block 1 can be connected to the inner surface of the mold cavity and / or injection channel by a rotating shaft. By rotating the rotating shaft, the pattern forming block 1 can be driven to rotate, thereby changing the contact surface between the plasticizing fluid and the pattern forming block 1, and thus forming different patterns.

[0032] In some embodiments, the shapes of the pattern forming block 1, the pattern forming pit, and the local forming area are arbitrary, which can form a variety of patterns to meet production needs.

[0033] In some embodiments, the pattern-forming block 1 includes at least one of a cylinder, a triangular prism, a semi-cylinder, an elliptical cylinder, and a crescent-shaped cylinder, and the pattern-forming recess includes at least one of a cylindrical recess, a triangular prism recess, a semi-cylinder recess, an elliptical cylindrical recess, and a crescent-shaped cylindrical recess. However, the pattern-forming block 1 and the pattern-forming recess of the present invention are not limited to the above types, and other shapes can be provided according to actual conditions.

[0034] In some embodiments, the pattern forming block 1 includes at least one of a constant height forming block and a gradient height forming block, and the pattern forming recess includes at least one of a constant depth recess and a gradient depth recess. The arrangement of the constant height forming block and the constant depth recess causes a sudden change in the flow direction of the fluid in the height direction, while the arrangement of the gradient height forming block and the gradient depth recess causes a smooth change in the flow direction of the fluid in the height direction, thereby forming different types of pattern patterns.

[0035] In some embodiments, the surface of the pattern forming block 1 is provided with a secondary pattern forming section, which includes a secondary pattern forming protrusion 2 and / or a secondary pattern forming recess. After the fluid undergoes a change of direction, mixing, and displacement through the pattern forming block 1, a second change of direction, mixing, and displacement will occur under the action of the secondary pattern forming protrusion 2 and / or the secondary pattern forming recess, thereby controlling and influencing the pattern forming process to form a specific pattern.

[0036] In some embodiments, the shapes of the secondary pattern forming protrusions and secondary pattern forming recesses are arbitrary to meet the diverse pattern forming requirements.

[0037] like Figure 1 As shown, the injection mold of the present invention uses a pattern forming block 1 as an arc-shaped column, which is set in the mold cavity. Multiple secondary pattern forming protrusions 2 are provided at the top of the pattern forming block 1, specifically five, which are distributed at intervals. After the two-color plasticizing fluid flows into the mold cavity and passes through the pattern forming block 1, the flow direction of the two-color plasticizing fluid changes under the action of the pattern forming block 1 and the secondary pattern forming protrusions 2. At the same time, the two colors of plasticizing fluid mix and exchange positions, thereby forming different colors and patterns on the molding surface and the front surface of the injection molded part. Among them, all A areas (areas without filling patterns) represent the molding area of ​​the first color fluid, all B areas (areas with dense filling patterns) represent the molding area of ​​the second color fluid, and all C areas (areas with loose filling patterns) represent the molding area after the two colors of fluid are mixed.

[0038] like Figure 2 As shown, in the injection mold of the present invention, the pattern forming block 1 is set as a crescent-shaped column and is set in the mold cavity. After the two-color plasticizing fluid flows into the mold cavity and passes through the pattern forming block 1, the flow direction of the two-color plasticizing fluid changes under the action of the pattern forming block 1, thereby forming a pattern similar to annual rings on the molding surface and front side of the injection molded part. In this case, all D areas (without filled pattern areas) represent the first color fluid forming area, and all E areas (filled pattern areas) represent the second color fluid forming area.

[0039] like Figure 3As shown, using the injection mold of the present invention, the pattern forming block 1 is set as a cylinder and is set in the mold cavity. After the two-color plasticizing fluid flows into the mold cavity and passes through the pattern forming block 1, the flow direction of the two-color plasticizing fluid changes under the action of the pattern forming block 1. At the same time, the two colors of plasticizing fluid mix and exchange positions, thereby forming different colors and patterns on the molding surface and the front surface of the injection molded part. Among them, all F areas (dense filling pattern areas) represent the molding area of ​​the first color fluid, all H areas (no filling pattern areas) represent the molding area of ​​the second color fluid, and all G areas (loose filling pattern areas) represent the molding area after the two color fluids are mixed.

[0040] like Figure 4 As shown, the injection mold of the present invention has three pattern forming blocks 1 set in the mold cavity, two of which are crescent-shaped pillars and one is a right-angle iron pillar. The two crescent-shaped pillars are located on both sides downstream of the right-angle iron pillar. The two colors of fluids, which are distributed alternately, change their flow direction under the action of the right-angle iron pillar. At the same time, the two colors of plasticized fluids mix and exchange positions. Then, under the action of the two crescent-shaped pillars, the flow direction changes again and the fluids mix and exchange positions, thereby forming different colors and patterns on the forming surface and front surface of the injection molded part. In this case, all I areas (filled pattern areas) represent the forming area of ​​the first color fluid, and all K areas (no filled pattern areas) represent the forming area of ​​the second color fluid.

[0041] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A pattern-controllable injection mold, comprising a mold cavity and an injection runner communicating with the mold cavity, characterized in that: The mold cavity and / or the injection runner are provided with a pattern forming part, which can change the flow direction of plasticizing fluids of different colors flowing through the pattern forming part and / or mix and exchange the plasticizing fluids of different colors. The pattern forming part includes at least one of a pattern forming block, a pattern forming recess, and a partial forming area; the pattern forming block and the pattern forming recess are disposed on the inner surface of the mold cavity and / or the injection runner, and the partial forming area constitutes a part of the mold cavity and / or the injection runner; the height of the pattern forming block disposed in the mold cavity is less than the forming thickness of the mold cavity, the height of the pattern forming block disposed in the injection runner does not exceed the runner height of the injection runner, and the forming thickness of the partial forming area is different from the forming thickness of its surrounding area; The pattern forming block can be adjusted and disposed on the inner surface of the mold cavity and / or the injection runner; The surface of the patterned block is provided with a secondary patterned part, which includes a secondary patterned protrusion and / or a secondary patterned recess.

2. The injection mold with controllable pattern according to claim 1, characterized in that: The telescopic adjustment of the pattern forming block can cause the pattern forming block to protrude from the inner surface of the mold cavity and / or the injection channel, or to sink into the inner surface of the mold cavity and / or the injection channel to form the pattern forming pit.

3. The injection mold with controllable pattern according to claim 1, characterized in that: Rotating the pattern-forming block can change its orientation.

4. The injection mold with controllable pattern according to claim 1, characterized in that: The shapes of the patterned blocks, the patterned recesses, and the localized forming areas can be arbitrary.

5. The injection mold with controllable pattern according to claim 1, characterized in that: The patterned block includes at least one of a cylinder, a triangular prism, a semi-cylinder, an elliptical cylinder, and a crescent-shaped cylinder, and the patterned recess includes at least one of a cylindrical recess, a triangular prism recess, a semi-cylinder recess, an elliptical cylindrical recess, and a crescent-shaped cylindrical recess.

6. The pattern-controllable injection mold according to claim 1, characterized in that: The patterned forming block includes at least one of a constant height forming block and a gradient height forming block, and the patterned forming pit includes at least one of a constant depth pit and a gradient depth pit.

7. The injection mold with controllable pattern according to claim 1, characterized in that: The shapes of the secondary pattern forming protrusions and the secondary pattern forming recesses can be arbitrary.

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