Cosmetic pencil double-color forming mold structure

Abstract

The utility model discloses a cosmetic pencil double-color forming mold structure, and relates to the technical field of cosmetic pencil injection molds, a basic mold comprises a male mold plate and a female mold plate, the pouring parts of the male mold plate and the female mold plate are mutually closed, a nib mold core suite or a penholder mold core suite is mounted on the male mold plate, the pouring parts are communicated with the female mold plate through a runner plate, and the runner plate is communicated with the mold core suite; a limiting baffle is arranged at the joint position of a pen point and a pen holder of the pen shell cavity, the area above the limiting baffle is a pen point cavity, and a runner of the pen point mold core suite is communicated with the pen point cavity. And the runner of the penholder mold core suite is communicated with the penholder cavity. According to the two-color forming mold structure of the cosmetic brush, the brush head mold core suite and the brush holder mold core suite share the basic mold, the structures of the brush shell cavities in the mold cores are equal, and the two-color injection molding of the brush head and the brush shell is realized by changing the runner path of the corresponding mold core suite and matching with the limiting baffle plate. The yield is effectively improved through two injection molding procedures, the mold opening cost is effectively reduced through common parts, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cosmetic pen injection molds, in particular to a cosmetic pen double-color molding mold structure. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The injection molding shape can be from simple to complex, the size can be from large to small, and the product size is precise. The product is easy to update and can form parts with complex shapes. Injection molding is suitable for mass production and molding processing, and is widely used in the fields of cosmetics production.

[0003] CN202220295161.8 discloses a batch molding mold for polymer biodegradable plastic shells for cosmetic brushes, comprising a base plate: a mold mounting seat, which stands on the top of the base plate, and a mounting groove is opened on the top of the mold mounting seat, and a mold core is installed inside the mounting groove, and a T-shaped block is fixedly connected to the bottom of the mold core.

[0004] As the number of cosmetic brushes increases, two-color shell cosmetic brushes are gradually favored by consumers. Existing two-color shell cosmetic brush molding molds have a low yield rate and slow production efficiency, which cannot meet the growing market demand and have low production efficiency. Utility Model Content

[0005] The utility model aims to at least solve the technical problem existing in the prior art that "the existing two-color shell cosmetic pen molding mold has a low yield rate and slow production efficiency, cannot meet the growing market demand, and has low production efficiency". To this end, the utility model proposes a cosmetic pen two-color molding mold structure, optimizes the internal structure of the mold according to the two-color molding needs of cosmetic pen, adopts a structure of molding with special molds in different regions to improve the connection effect of the two-color shell, shares the mold, reduces manufacturing costs, improves the yield rate of the two-color shell and improves production efficiency.

[0006] According to some embodiments of the present invention, the two-color molding mold structure of a cosmetic pen includes a pen tip mold core kit for forming a pen tip, a pen holder mold core kit for forming a pen holder, and a basic mold compatible with the pen tip mold core kit and the pen holder mold core kit;

[0007] The basic mold comprises a male mold plate and a female mold plate whose casting parts are closed to each other, the pen tip mold core kit or the pen holder mold core kit is installed on the male mold plate, the casting part is connected to the female mold plate through a flow channel plate, and the flow channel plate is connected to the mold core kit;

[0008] The nib mold core kit comprises a nib front mold core and a nib rear mold core, the nib front mold core and the nib rear mold core are closed on the male mold plate to form a pen shell cavity; the nib front mold core and the nib rear mold core are provided with a limit baffle at the connection position of the nib and the pen shaft corresponding to the pen shell cavity, the nib cavity is located above the limit baffle, the pen shaft cavity is located below the limit baffle, and the flow channel of the nib mold core kit is connected to the nib cavity;

[0009] The pen body mold kit includes a front pen body mold and a rear pen body mold. The front pen body mold and the rear pen body mold are combined on the male mold plate to form the pen shell cavity. The pen shell cavity includes the nib cavity and the pen body cavity. The flow channel of the pen body mold kit is connected to the pen body cavity.

[0010] According to some embodiments of the utility model, the flow channel plate is provided with four groups of diversion holes. When the nib mold kit is installed on the basic mold, the diversion holes are connected with the flow channel of the nib mold kit; when the pen holder mold kit is installed on the basic mold, the diversion holes are connected with the flow channel of the pen holder mold kit.

[0011] According to some embodiments of the utility model, the outer contours of the nib mold kit and the pen holder mold kit are the same, and the basic mold can be used in combination.

[0012] According to some embodiments of the utility model, the female template is provided with a closed area, the contour of the closed area matches the contour of the nib mold core kit; when the female template and the male template are closed, the nib front mold core and the nib rear mold core are close to each other.

[0013] According to some embodiments of the utility model, limiting slots are provided at the connection between the front mold core of the nib and the rear mold core of the nib corresponding to the nib cavity and the pen shaft cavity, and the limiting baffle is inserted into the pen shell cavity from the limiting slots on both sides of the front mold core of the nib and the rear mold core of the nib to separate the nib cavity from the pen shaft cavity.

[0014] According to some embodiments of the present utility model, the flow channel of the nib mold kit extends from one end of the diversion hole to the bottom area of ​​the nib cavity.

[0015] According to some embodiments of the present invention, the flow channel of the pen holder mold core kit extends from one end of the diversion hole to the bottom area of ​​the pen holder cavity.

[0016] According to some embodiments of the present utility model, a mold core is arranged in the pen shell mold cavity, and the mold core extends from the pen shaft mold cavity to the pen head mold cavity.

[0017] According to some embodiments of the present utility model, a plurality of groups of the pen shell cavities are arranged in the pen tip mold kit and the pen body mold kit.

[0018] According to some embodiments of the utility model, the nib workpiece formed in the nib mold kit is placed on the mold core of the pen body mold kit, and after the pen body front mold and the pen body rear mold are closed, the colloid enters the pen body cavity from the flow channel and connects with the bottom of the nib workpiece to form a complete pen body workpiece.

[0019] According to some embodiments of the present invention, the two-color molding mold structure of the cosmetic pen has at least the following beneficial effects: the pen tip mold core kit and the pen holder mold core kit share the basic mold, the structure of the pen shell cavity in the mold core is equal, and the two-color injection molding of the pen tip and the pen shell is achieved by changing the flow path of the corresponding mold core kit and cooperating with the limit baffle. The two-step injection molding process effectively improves the yield rate, and the shared components effectively reduce the mold opening cost and improve production efficiency.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a three-dimensional schematic diagram of a two-color molding mold for a cosmetic pen according to an embodiment of the utility model;

[0023] Figure 2 It is a partial schematic diagram of the pen tip mold kit of the utility model;

[0024] Figure 3 It is a partial schematic diagram of the pen holder mold kit of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the flow channel plate of the utility model;

[0026] Figure 5 It is a schematic diagram of the limit baffle and the limit slot of the pen tip mold kit of the utility model;

[0027] Figure 6 It is a cross-sectional view of the pen tip mold kit of the utility model;

[0028] Figure 7 for Figure 6 An enlarged schematic diagram of part A;

[0029] Figure 8 It is a cross-sectional view of the pen holder mold core kit of the utility model;

[0030] Fig. 9 for Figure 8 An enlarged schematic diagram of part B.

[0031] Reference numerals:

[0032] Basic mold 100, casting part 120, male mold plate 130, female mold plate 140, flow channel plate 150, diversion hole 151,

[0033] The nib mold core kit 200, the nib front mold core 210, the nib rear mold core 220, the limit baffle 230, the limit slot 240, the mold core flow channel 250,

[0034] Pen holder mold kit 300, pen holder front mold 310, pen holder rear mold 320,

[0035] The pen tip cavity 410, the pen body cavity 420, and the mold core 430. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, top, bottom, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of the pen head or pen barrel, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference below Figure 1-Figure 9The double-color molding mold structure of a cosmetic pen according to an embodiment of the utility model is described.

[0041] like Figure 1-Figure 9 As shown, the two-color molding mold structure of the cosmetic pen includes a pen tip mold core kit 200 for pen tip molding, a pen holder mold core kit 300 for pen holder molding, and a basic mold 100 compatible with the pen tip mold core kit 200 and the pen holder mold core kit 300. The mold structure in this embodiment includes a set of dual-use basic molds 100 and two sets of pen tip mold core kits 200 and pen holder mold core kits 300 for replacement. The use of a dual-use structure can greatly reduce the mold production cost and improve production efficiency. Two sets of basic molds 100 are used to install the pen tip mold core kit 200 and the pen holder mold core kit 300 respectively, and after the pen tip workpiece is formed in the pen tip mold, it is installed in the pen holder mold and then the pen holder is molded to finally form a pen shell. The secondary molding method can form a two-color structure for the pen shell, and the pen tip can be better molded with the raw material in the pen holder mold, so that the pen tip and the pen holder are connected more naturally, effectively improving the yield rate.

[0042] Specifically, the basic mold 100 includes a male mold plate 130 and a female mold plate 140 that are closed together with a casting part 120, a pen tip mold core kit 200 or a pen holder mold core kit 300 is installed on the male mold plate 130, and the casting part 120 is connected to the female mold plate 140 through a flow channel plate 150, and the flow channel plate 150 is connected to the mold core kit. In addition to the casting part 120, the male mold plate 130, the female mold plate 140 and the flow channel plate 150, the basic mold 100 also includes other components of the mold. In this embodiment, the main improved structure is the mold core kit. The other components are technical solutions well known to those skilled in the art and will not be described in detail in this embodiment.

[0043] The nib mold core kit 200 includes a nib front mold core 210 and a nib rear mold core 220, which are closed on a male mold plate 130 to form a pen shell cavity; a limiting baffle 230 is provided at the connection position between the nib and the pen shaft of the pen shell cavity corresponding to the nib front mold core 210 and the nib rear mold core 220, the nib cavity 410 is located above the limiting baffle 230, and the pen shaft cavity 420 is located below the limiting baffle 230, and the flow channel of the nib mold core kit 200 is connected to the nib cavity 410.

[0044] The pen body mold core kit 300 includes a pen body front mold core 310 and a pen body rear mold core 320. The pen body front mold core 310 and the pen body rear mold core 320 are closed on the male mold plate 130 to form a pen shell cavity. The pen shell cavity includes a pen head cavity 410 and a pen body cavity 420. The flow channel of the pen body mold core kit 300 is connected to the pen body cavity 420.

[0045] In this embodiment, the difference between the nib mold set 200 and the pen holder mold set 300 is that the flow channels inside the molds connect different areas. The nib mold set 200 is provided with a limit baffle 230 to assist the nib molding of the nib cavity 410 compared to the pen holder mold set 300.

[0046] The cosmetic pen two-color molding mold structure of the utility model adopts two sets of molds to realize the secondary two-color molding of the cosmetic pen shell, which has a higher yield rate and more stable molding than the existing mold structure. In addition, the utility model adopts a combined basic mold 100, which greatly reduces the mold production cost and improves production efficiency.

[0047] In some embodiments of the present invention, Figure 4 , Figure 6 and Figure 8 As shown, the flow channel plate 150 is provided with four groups of diverter holes 151. When the nib mold assembly 200 is installed in the basic mold 100, the diverter holes 151 are connected to the flow channel of the nib mold assembly 200. When the pen holder mold assembly 300 is installed in the basic mold 100, the diverter holes 151 are connected to the flow channel of the pen holder mold assembly 300.

[0048] Specifically, this embodiment uses four groups of diverting holes 151 to divert the raw materials of the casting part 120, and each group of diverting holes 151 eventually flows into two groups of pen shell cavities in the mold core kit. Eight groups of pen tips can be produced in one molding, and the production efficiency is high.

[0049] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the outer contours of the nib mold core kit 200 and the pen holder mold core kit 300 are the same, and the basic mold 100 can be used in combination. Specifically, in order to ensure that the nib mold core kit 200 and the pen holder mold core kit 300 are compatible with the basic mold 100, the same outer contour is used when manufacturing the mold core kits in this embodiment. It can ensure that the nib mold core kit 200 and the pen holder mold core kit 300 are used alternately on the basic mold 100 without interference, thereby improving the compatibility of mold components, making it more convenient to maintain and repair the mold in the later stage, and reducing manufacturing costs.

[0050] In some embodiments of the present invention, the female template 140 is provided with a closed area (not shown in the accompanying drawings), the outline of the closed area matches the outline of the nib mold core kit 200; when the female template 140 and the male template 130 are closed, the nib front mold core 210 and the nib rear mold core 220 are close to each other.

[0051] Specifically, the closing area is stepped, and the front mold core and the rear mold core are in a separated state before the mold is closed. When the female mold plate 140 is pressed downward toward the male mold plate 130, the closing area exerts a force on the front mold core and the rear mold core, causing the front mold core and the rear mold core to move closer to each other and close.

[0052] In some embodiments of the present invention, Figure 2 , Figure 4 and Figure 6 As shown, a limiting slot 240 is provided at the connection between the front mold core 210 and the rear mold core 220 of the nib corresponding to the nib cavity 410 and the pen body cavity 420, and a limiting baffle 230 is inserted into the pen shell cavity from the limiting slots 240 on both sides of the front mold core 210 and the rear mold core 220 of the nib, so as to separate the nib cavity 410 from the pen body cavity 420.

[0053] Specifically, during the molding process of the cosmetic brush shell, the pen tip is first molded by the pen tip mold kit 200. In order to prevent the raw material from entering the pen shaft cavity 420, a limit plate is set between the pen tip cavity 410 and the pen shaft cavity 420. The pen shell cavity can be divided into two unconnected areas to ensure that the raw material of the pen tip cavity 410 will not remain in the pen shaft cavity 420, thereby improving the yield rate.

[0054] In some embodiments of the present invention, Figure 2 , Figure 6 and Figure 7 As shown, the flow channel of the nib mold core kit 200 extends from one end of the diverter hole 151 to the bottom area of ​​the nib cavity 410. Specifically, in order to reduce the influence of air on molding, the raw material is injected from the bottom of the nib cavity 410, which effectively reduces the pores and improves the molding yield.

[0055] In some embodiments of the present invention, Figure 3 , Figure 8 and Fig. 9 As shown, the flow channel of the penholder mold core kit 300 extends from one end of the diverter hole 151 to the bottom area of ​​the penholder cavity 420. Specifically, in order to reduce the influence of air on molding, the raw material is injected from the bottom of the penholder cavity 420, which effectively reduces air holes and improves the molding yield.

[0056] In some embodiments of the present invention, Figure 7 and Fig. 9 As shown, a mold core 430 is disposed in the pen shell cavity, and the mold core 430 extends from the pen body cavity 420 to the pen head cavity 410.

[0057] Specifically, the mold core 430 is a technical solution well known to those skilled in the art and will not be described in detail in this embodiment. In order to reduce the difficulty of later maintenance of the mold, the mold core 430 in this embodiment is arranged in both the pen head cavity 410 and the pen body cavity 420 to improve the compatibility of the mold core 430.

[0058] In some embodiments of the present invention, Figure 6 and Figure 8As shown, multiple groups of pen shell cavities are provided in the pen tip mold core kit 200 and the pen barrel mold core kit 300. Specifically, in this embodiment, each mold core kit is provided with eight groups of pen shell cavities, and eight pen tip workpieces are formed at one time, which effectively improves production efficiency.

[0059] In some embodiments of the present invention, Figure 6-Figure 9 As shown, the nib workpiece formed in the nib mold kit 200 is placed on the mold core 430 of the pen body mold kit 300. After the pen body front mold 310 and the pen body rear mold 320 are closed, the colloid enters the pen body cavity 420 from the flow channel and connects with the bottom of the nib workpiece to form a complete pen shell workpiece.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A two-color molding mold structure for a cosmetic pen, characterized in that: It comprises a nib mold kit (200) for forming a nib, a pen holder mold kit (300) for forming a pen holder, and a basic mold (100) compatible with the nib mold kit (200) and the pen holder mold kit (300); The basic mold (100) comprises a male mold plate (130) and a female mold plate (140) which are closed together on a casting part (120); the nib mold core kit (200) or the pen holder mold core kit (300) is installed on the male mold plate (130); the casting part (120) is connected to the female mold plate (140) via a flow channel plate (150); and the flow channel plate (150) is connected to the mold core kit; The nib mold core kit (200) comprises a nib front mold core (210) and a nib rear mold core (220), wherein the nib front mold core (210) and the nib rear mold core (220) are closed on the male mold plate (130) to form a pen shell cavity; the nib front mold core (210) and the nib rear mold core (220) are provided with a limit baffle (230) corresponding to the connecting position of the nib and the pen shaft of the pen shell cavity, the nib cavity (410) is located above the limit baffle (230), and the pen shaft cavity (420) is located below the limit baffle (230); the flow channel of the nib mold core kit (200) is connected to the nib cavity (410); The pen holder mold core kit (300) comprises a pen holder front mold core (310) and a pen holder rear mold core (320), wherein the pen holder front mold core (310) and the pen holder rear mold core (320) are combined on the male mold plate (130) to form the pen shell mold cavity, wherein the pen shell mold cavity comprises the nib mold cavity (410) and the pen holder mold cavity (420), and the flow channel of the pen holder mold core kit (300) is connected to the pen holder mold cavity (420).

2. The two-color molding mold structure of a cosmetic pencil according to claim 1, characterized in that: The flow channel plate (150) is provided with four groups of diversion holes (151). When the nib mold kit (200) is installed on the basic mold (100), the diversion holes (151) are connected to the flow channel of the nib mold kit (200); when the pen holder mold kit (300) is installed on the basic mold (100), the diversion holes (151) are connected to the flow channel of the pen holder mold kit (300).

3. The two-color molding mold structure of a cosmetic pencil according to claim 2, characterized in that: The pen tip mold kit (200) and the pen holder mold kit (300) have the same outer profile and can use the basic mold (100) as well.

4. The two-color molding mold structure of a cosmetic pencil according to claim 3, characterized in that: The female template (140) is provided with a closed area, the contour of which matches the contour of the nib mold core kit (200); when the female template (140) and the male template (130) are closed, the nib front mold core (210) and the nib rear mold core (220) are brought close to each other.

5. The two-color molding mold structure of a cosmetic pen according to claim 4, characterized in that: The front mold core (210) and the rear mold core (220) of the nib are provided with limiting slots (240) corresponding to the connection between the nib cavity (410) and the pen holder cavity (420); the limiting baffle (230) is inserted into the pen shell cavity from the limiting slots (240) on both sides of the front mold core (210) and the rear mold core (220) of the nib, so as to separate the nib cavity (410) from the pen holder cavity (420).

6. The two-color molding mold structure of a cosmetic pen according to claim 5, characterized in that: The flow channel of the nib mold core kit (200) extends from one end of the diversion hole (151) to the bottom area of ​​the nib mold cavity (410).

7. The two-color molding mold structure of a cosmetic pen according to claim 6, characterized in that: The flow channel of the penholder mold core kit (300) extends from one end of the diversion hole (151) to the bottom area of ​​the penholder cavity (420).

8. The two-color molding mold structure of a cosmetic pen according to claim 4, characterized in that: A mold core (430) is arranged in the pen shell mold cavity, and the mold core (430) extends from the pen shaft mold cavity (420) to the pen head mold cavity (410).

9. The two-color molding mold structure of a cosmetic pen according to claim 8, characterized in that: A plurality of groups of pen shell cavities are arranged in the pen head mold core kit (200) and the pen body mold core kit (300).

10. The two-color molding mold structure of a cosmetic pen according to claim 8, characterized in that: The nib workpiece formed in the nib mold kit (200) is placed on the mold core (430) of the pen body mold kit (300), and after the pen body front mold (310) and the pen body rear mold (320) are closed, the colloid enters the pen body cavity (420) from the flow channel and connects with the bottom of the nib workpiece to form a complete pen body workpiece.

Images