Multi-layer upper mold and double-color or multi-color injection mold

Abstract

The invention relates to the field of injection molds, in particular to a multi-layer upper mold and a double-color or multi-color injection mold. The multi-layer upper die comprises a third die core plate and a fourth die core plate, a plurality of protruding third hollow columns are arranged on the third die core plate, and a plurality of protruding fourth hollow columns are arranged on the fourth die core plate; the fourth hollow column is arranged on the outer side of the third hollow column in a sleeving mode, a side cavity is formed between the third hollow column and the fourth hollow column, and the side cavity is in an inverted conical surface shape; a plurality of main cavities are formed between the fourth mold core plate and an external lower mold, and the side cavities are communicated with the main cavities; a groove is formed in the fourth mold core plate, and at least part of the fourth hollow column is arranged in the groove. The multi-layer upper mold and the double-color or multi-color injection mold have the advantages that the multi-layer upper mold and the double-color or multi-color injection mold can be used for integral injection molding of artificial flowers, pedicels and flowers do not need to be manually assembled, and the formed flowers are located at different heights on the pedicels.

Description

Technical Field

[0001] This invention relates to the field of injection molds, and in particular to a multi-layer upper mold and a two-color or multi-color injection mold. Background Technology

[0002] Existing artificial flowers include flower stems and flowers. The flowers contain several layers of petals, which are sewn together by hand. The flower stems can have multiple branches of different lengths and heights, and then the flowers are attached to the top of the branches by hand.

[0003] For example, Chinese Patent Publication No. CN205030572U discloses "a simulated rose, comprising an elastic hollow tubular stem, an elastic receptacle sealed to the upper end of the stem, and multiple petals fixedly connected to the upper end of the receptacle;" and "a connector is integrally formed below the receptacle, the connector is inserted into the stem, and the outer wall of the connector is glued to the inner wall of the stem." Artificial flowers with multiple blossoms on a single stem, such as baby's breath, multi-headed roses, and multi-headed lilies, require more manual labor, and manual installation has a higher defect rate, with the risk of the blossoms separating from the stem.

[0004] For example, Chinese Patent No. CN220088669U discloses "a simulated gerbera, including a support rod, multiple flowers and leaves, the support rod including a main support rod and multiple branch rods, each branch rod being arranged radially on the main support rod", and "each flower, from the inside out, includes a stamen, a corolla, a receptacle and a pedicel, the corolla including a first petal layer and a second petal layer, the upper end of the pedicel is connected to the stamen, and the pedicel passes through a first through hole, a second through hole and a third through hole in sequence to install the first petal layer, the second petal layer and the receptacle on the pedicel from top to bottom". Therefore, existing artificial flowers require manual assembly between the flowers and stems, resulting in low production efficiency, high cost, and the flowers are prone to falling off. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the purpose of this invention is to provide a multi-layer upper mold and a two-color or multi-color injection mold that can be used for one-piece injection molding of artificial flowers, eliminating the need for manual assembly of flower stems and flowers, and allowing the flowers to have various heights.

[0006] The technical solution adopted by this invention to solve the problem is: a multi-layer upper mold, comprising: A third mold core plate and a fourth mold core plate are provided. The third mold core plate has a plurality of raised third hollow pillars, and the fourth mold core plate has a plurality of raised fourth hollow pillars. The fourth hollow pillars are sleeved on the outside of the third hollow pillars. A side cavity is provided between the third hollow pillars and the fourth hollow pillars. The side cavity is in the shape of an inverted cone. A plurality of main cavities are provided between the fourth mold core plate and the external lower mold. The side cavities are connected to the main cavities. The fourth mold core plate has a groove, and at least a portion of the fourth hollow pillars are located in the groove.

[0007] As an improved technical solution, the number of grooves is multiple, the multiple grooves have the same or different depths, and one fourth hollow column is provided in one of the grooves.

[0008] As an improved technical solution, a sprue sleeve is also included, which extends into the first hollow column, and a side cavity is also provided between the sprue sleeve and the first hollow column.

[0009] As an improved technical solution, it also includes a first mold core plate and a second mold core plate. The first mold core plate is provided with a first hollow column with a protrusion, and the second mold core plate is provided with a second hollow column with a protrusion. The third hollow column is sleeved on the outside of the second hollow column, and a side cavity is provided between the second hollow column and the third hollow column. The second hollow column is sleeved on the outside of the first hollow column, and a side cavity is provided between the first hollow column and the second hollow column.

[0010] As an improved technical solution, each side cavity includes multiple spaced-apart side cavity units in the form of polygonal sheets.

[0011] As an improved technical solution, it also includes an upper template, on which a hot runner plate is installed. The hot runner plate is provided with horizontally arranged hot runners and vertically arranged through-holes. The sprue sleeve is installed on the upper template, and the through-holes are connected to the sprue sleeve.

[0012] As an improved technical solution, the number of the through-hole flow channel, the water inlet sleeve, the first hollow column, and the second hollow column are all multiple.

[0013] As an improved technical solution, different first hollow columns have the same or different heights, different second hollow columns have the same or different heights, different third hollow columns have the same or different heights, and different fourth hollow columns have the same or different heights.

[0014] A two-color or multi-color injection mold includes a multi-layer upper mold, a lower mold, and a first upper mold. The lower mold has a lower cavity. The lower mold and the first upper mold are fitted together to form a first mold cavity, which includes the lower cavity. After the lower mold and the multi-layer upper mold are fitted together, the lower cavity is connected to the main cavity.

[0015] As a further improvement to the above technical solution, the first upper mold is provided with a plurality of columnar upper mold cores, the end face of the upper mold core is provided with a spherical surface, the center of the spherical surface is provided with a blind hole, and the first mold cavity includes the blind hole.

[0016] As a further improvement to the above technical solution, the lower mold includes a plurality of core-pulling blocks, the lower cavity is located in the core-pulling blocks, the top of the lower mold cavity is provided with a second spherical surface, a gap is provided between the second spherical surface and the spherical surface, the gap is connected to the lower cavity and the blind hole, and the first mold cavity includes the gap and the blind hole.

[0017] The beneficial effects of this invention are: 1. The multi-layer upper mold of this application can be used for injection molding of layered petals, and can be used to mold at least one layer of petals at one time. It can be used in conjunction with the peripheral, existing lower mold to integrally mold flowers and stems. 2. Due to the groove, at least part of the fourth hollow column is located in the groove, so the formed flower is located at different heights on the flower stem, and the shape is lifelike. Attached Figure Description

[0018] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a top view of the multi-layered upper and lower molds of the present invention; Figure 2 for Figure 1 BB cross-sectional view; Figure 3 for Figure 2 Enlarged view of the H section; Figure 4 This is a three-dimensional view of the fourth core plate from an oblique angle. Figure 5 This is a three-dimensional view of the fourth core plate from a slightly lower angle. Figure 6 This is a sectional view of the first upper and lower molds after they are assembled. Figure 7 yes Figure 6 Enlarged view of part K; Figure 8 It is a three-dimensional image of the flower and its stem; Figure 9 yes Figure 10 AA section view; Figure 10 This is a bottom view of the multi-layered upper mold.

[0020] In the diagram: 1-First mold core plate, 10-First hollow pillar, 2-Second mold core plate, 21-Second hollow pillar, 3-Third mold core plate, 31-Third hollow pillar, 4-Fourth mold core plate, 41-Fourth hollow pillar, 42-Groove, 5-Side cavity, 51-Side cavity unit, 6-Main cavity, 7-Sprue sleeve, 8-Upper mold plate, 9-Hot runner plate, 91-Through-hole runner, 11-Lower mold, 110-Core pulling block, 12-Lower cavity, 13-First upper mold, 131-Upper mold core, 1311-Blind hole, 14-First mold cavity, 15-Gap, 16-Flower, 17-Flower stem, 171-Flower holder. Detailed Implementation

[0021] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0023] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] Reference Figures 1 to 10 A multi-layer upper mold, comprising: The third mold core plate 3 and the fourth mold core plate 4 are provided. The third mold core plate 3 is provided with a plurality of protruding third hollow pillars 31, and the fourth mold core plate 4 is provided with a plurality of protruding fourth hollow pillars 41. The fourth hollow pillars 41 are sleeved on the outside of the third hollow pillars 31. A side cavity 5 is provided between the third hollow pillars 31 and the fourth hollow pillars 41. The side cavity 5 is in the shape of an inverted cone. A plurality of main cavities 6 are provided between the fourth mold core plate 4 and the external lower mold 11. The side cavity 5 is connected to the main cavity 6. The fourth mold core plate 4 is provided with a groove 42. At least a portion of the fourth hollow pillars 41 are provided in the groove 42.

[0026] The special design of the multi-layer upper mold in this application lies in the fact that a side cavity 5 is provided between the third hollow column 31 and the fourth hollow column 41. The side cavity 5 is inverted conical in shape and can be used to form layered petals. The flower 16 is composed of petals, and the main cavity 6 forms the flower stem 17, the receptacle 171, and the outermost petals. Alternatively, the main cavity can form the receptacle 171, and only the flower stem 17 and the receptacle 171 can be formed. (Refer to...) Figure 4-5 The inner wall of the fourth hollow column 41 serves as the cavity wall for the upper petal, and the outer wall of the fourth hollow column 41 serves as the cavity wall for the lower upper petal. Therefore, the flower stem 17 and the flower 16 can be integrally injection molded, greatly improving molding efficiency compared to manual assembly of the flower stem 17 and the flower 16. Furthermore, part of the fourth hollow column 41 is located in the groove 42, and the petals formed in this part of the side cavity 5 are positioned higher than the other petals, enabling simultaneous molding of flowers at various heights. (Refer to...) Figure 3 The main cavity 6 forms the flower stem 17, the receptacle 171, and the outermost petals. Figure 3 Only a portion of the core-pulling block 110 is displayed; not all of the core-pulling blocks 110 are shown.

[0027] Preferably, there are multiple grooves 42, and the multiple grooves 42 have the same or different depths, and one fourth hollow column 41 is provided in one of the grooves 42.

[0028] Reference Figure 2-3 In a preferred embodiment, a sprue sleeve 7 is also included, which extends into the first hollow column 10. A side cavity 5 is also provided between the sprue sleeve 7 and the first hollow column 10. The sprue sleeve 7 is a commonly used part in the field of injection molds. However, the sprue sleeve in the prior art is only used to allow the plastic melt to flow from the mold gate to the mold cavity. In this application, a side cavity 5 is also provided between the sprue sleeve 7 and the first hollow column 10, that is, the sprue sleeve 7 also serves as a cavity for product molding, increasing the number of petal layers of the flower 16 and improving the molding effect of the flower 16.

[0029] It also includes a first mold core plate 1 and a second mold core plate 2. The first mold core plate 1 is provided with a protruding first hollow column 11, and the second mold core plate 2 is provided with a protruding second hollow column 21. The third hollow column 31 is sleeved on the outside of the second hollow column 21, and a side cavity 5 is provided between the second hollow column 21 and the third hollow column 31. The second hollow column 21 is sleeved on the outside of the first hollow column 11, and a side cavity 5 is provided between the first hollow column 11 and the second hollow column 21.

[0030] Reference Figure 4 In a preferred embodiment, each side cavity 5 includes a plurality of spaced-apart polygonal side cavity units 51. One side cavity unit 51 can form a polygonal petal.

[0031] Reference Figure 2 The preferred embodiment further includes an upper template 8, on which a hot runner plate 9 is installed. The hot runner plate 9 is provided with a horizontally arranged hot runner and a vertically arranged through-hole runner 91. The sprue sleeve 7 is installed on the upper template 8, and the through-hole runner 91 is connected to the sprue sleeve 7.

[0032] In a preferred embodiment, there are multiple through-hole channels 91, sprue sleeves 7, first hollow columns 10, and second hollow columns 21. This is used for simultaneous injection molding of multiple flowers 16.

[0033] In a preferred embodiment, there are multiple first hollow columns 10 and second hollow columns 21. Different first hollow columns 10 have the same or different heights, different second hollow columns 21 have the same or different heights, different third hollow columns 31 have the same or different heights, and different fourth hollow columns 41 have the same or different heights. By setting several first hollow columns 10 and second hollow columns 21 of different heights, the flowers 16 are located at different heights on the flower stem 17.

[0034] This application also provides a two-color or multi-color injection mold, including the aforementioned multi-layer upper mold, and further including a lower mold 11 and a first upper mold 13. The lower mold 11 is provided with a lower cavity 12. After the lower mold 11 and the first upper mold 13 are fitted together, a first mold cavity 14 is formed. The first mold cavity 14 includes the lower cavity 12. After the lower mold and the multi-layer upper mold are fitted together, the lower cavity 12 is connected to the main cavity 6.

[0035] When the first material is injected in the two-color injection molding process, the lower mold 11 and the first upper mold 13 cooperate to form the flower stem 17 in the first mold cavity 14. Then the mold is opened, and the flower stem 17 in the lower mold 11 is not removed. Then the lower mold is transferred to cooperate with the multi-layer upper mold to inject the second material and form the flower 16 at the upper end of the flower stem 17.

[0036] In a preferred embodiment, the first upper mold 13 is provided with a plurality of columnar upper mold cores 131, the end face of each upper mold core 131 having a spherical surface, and the center of each spherical surface having a blind hole 1311. The first mold cavity 14 includes the blind hole 1311. The spherical surface cooperates with the lower mold 11 to form the flower holder 171, and the blind hole 1311 can be used to form a pin, which is embedded in the flower 16, thereby increasing the reliability of the simulated flower product.

[0037] In a preferred embodiment, the lower mold 11 includes a plurality of core-pulling blocks, the lower cavity 12 is located in the core-pulling blocks, the top of the lower mold 11 cavity is provided with a second spherical surface, a gap 15 is provided between the second spherical surface and the spherical surface, the gap 15 is connected to the lower cavity 12 and the blind hole 1311, and the first mold cavity 14 includes the gap 15 and the blind hole 1311.

[0038] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct or indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A multi-layer upper mold, characterized in that, include: The third core plate (3) and the fourth core plate (4) are provided with a plurality of protruding third hollow columns (31) on the third core plate (3) and a plurality of protruding fourth hollow columns (41) on the fourth core plate (4). The fourth hollow column (41) is sleeved on the outside of the third hollow column (31), and a side cavity (5) is provided between the third hollow column (31) and the fourth hollow column (41). The side cavity (5) is in the shape of an inverted cone. The fourth mold core plate (4) is provided with multiple main cavities (6) between it and the external lower mold (11), and the side cavity (5) is connected to the main cavity (6); The fourth core plate (4) is provided with a groove (42), and at least part of the fourth hollow column (41) is provided in the groove (42).

2. The multi-layer upper mold as described in claim 1, characterized in that: The number of the grooves (42) is multiple, and the multiple grooves (42) have the same or different depths. A fourth hollow column (41) is provided in one of the grooves (42).

3. A multi-layer upper mold as described in claim 1, characterized in that: It also includes a first mold core plate (1) and a second mold core plate (2). The first mold core plate (1) is provided with a first hollow column (11) with a protrusion, and the second mold core plate (2) is provided with a second hollow column (21) with a protrusion. The third hollow column (31) is sleeved on the outside of the second hollow column (21), and a side cavity (5) is provided between the second hollow column (21) and the third hollow column (31). The second hollow column (21) is sleeved on the outside of the first hollow column (11), and a side cavity (5) is provided between the first hollow column (11) and the second hollow column (21).

4. A multi-layer upper mold as described in claim 3, characterized in that: It also includes a sprue sleeve (7), which extends into the first hollow column (10), and a side cavity (5) is also provided between the sprue sleeve (7) and the first hollow column (10).

5. A multi-layer upper mold as described in claim 1, characterized in that: Each side cavity (5) includes multiple spaced-apart polygonal side cavity units (51).

6. A multi-layer upper mold as described in claim 3, characterized in that: It also includes an upper template (8), on which a hot runner plate (9) is installed. The hot runner plate (9) is provided with a horizontally arranged hot runner and a vertically arranged through-hole runner (91). The sprue sleeve (7) is installed on the upper template (8), and the through-hole runner (91) is connected to the sprue sleeve (7).

7. A multi-layer upper mold as described in claim 4, characterized in that: Different first hollow columns (10) have the same or different heights, different second hollow columns (21) have the same or different heights, different third hollow columns (31) have the same or different heights, and different fourth hollow columns (41) have the same or different heights.

8. A two-color or multi-color injection mold, comprising a multi-layer upper mold as described in claim 1, characterized in that: The multi-layer upper mold includes a lower mold (11) and a first upper mold (13). The lower mold (11) has a lower cavity (12). The lower mold (11) and the first upper mold (13) are fitted together to form a first mold cavity (14). The first mold cavity (14) includes the lower cavity (12). After the lower mold is engaged with the multi-layer upper mold, the lower cavity (12) is connected to the main cavity (6).

9. A two-color or multi-color injection mold as described in claim 1, characterized in that: The first upper mold (13) is provided with a plurality of columnar upper mold cores (131), the end face of the upper mold core (131) is provided with a spherical surface, the center of the spherical surface is provided with a blind hole (1311), and the first mold cavity (14) includes the blind hole (1311).

10. A two-color or multi-color injection mold as described in claim 1, characterized in that: The lower mold (11) includes several core-pulling blocks, the lower cavity (12) is located in the core-pulling blocks, the top of the lower mold (11) cavity is provided with a second spherical surface, and a gap (15) is provided between the second spherical surface and the spherical surface. The gap (15) is connected to the lower cavity (12) and the blind hole (1311). The first mold cavity (14) includes the gap (15) and the blind hole (1311).

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