Closed font double-color mold structure

Abstract

The utility model relates to the technical field of molds, and discloses a closed font double-color mold structure which comprises an inner block injection mold and an outer block injection mold, a color inner block is formed on the inner block injection mold in an injection molding mode, the color inner block is provided with a longitudinal runner and a transverse runner which are communicated, and the outer block injection mold comprises a second front mold and a second rear mold. The second front mold is provided with a second upper runner and an outer block top mold, the second rear mold comprises a second lower runner and an outer block bottom mold, the second upper runner and the second lower runner form a second runner, the color inner block is installed on the outer block bottom mold, the color inner block and the outer block top mold form an annular runner, and the upper end of the annular runner is communicated with the transverse runner; and the lower end of the annular runner is communicated with the second runner. According to the double-color mold structure for the closed fonts, under the condition that the attractiveness of the product is not damaged, the double-color font product with the small size is produced through tunnel type injection molding, and the double-color mold structure for the closed fonts is simple in structure and convenient to maintain and use.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to a closed-font two-color mold structure. Background Art

[0002] Currently, for two-color font products, slots are opened in the mold, and the periphery of the slots is in a sealed state. Although secondary injection molding can be carried out at the top of the slots to form two-color font products, it will damage the aesthetics of the products. In addition, there is also prior art where holes are opened at the bottom of the mold, and ejector pins are inserted from the holes to the top of the mold, and then secondary injection molding is carried out to form two-color font products. However, for relatively small two-color font structures, due to their small size, it is impossible to inject the two-color font structure by means of slotting or hole opening without damaging the aesthetics of the two-color font structure. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies existing in the prior art, and provide a closed-font two-color mold structure.

[0004] The purpose of the utility model is achieved through the following technical solutions: A closed-font two-color mold structure includes an inner block injection mold and an outer block injection mold. The inner block injection mold is injection molded with a color inner block. The color inner block includes a connected inner block base and a font top. The font top is provided with a longitudinal runner, and the inner block base is provided with a transverse runner. One end of the longitudinal runner is communicated with one end of the transverse runner. The outer block injection mold includes a second front mold and a second rear mold. The second front mold is provided with a second upper runner and an outer block top mold. The second rear mold includes a second lower runner and an outer block bottom mold. The second upper runner and the second lower runner form a second runner. The color inner block is installed on the outer block bottom mold. The color inner block and the outer block top mold form an annular runner. The upper end of the annular runner is communicated with the other end of the transverse runner, and the lower end of the annular runner is communicated with the second runner.

[0005] More preferably, the color inner block further includes a flow splitting portion. The flow splitting portion divides the transverse runner into two transverse branch runners. One end of each of the two transverse branch runners is communicated with the longitudinal runner, and the other end of each of the transverse branch runners is communicated with the annular runner.

[0006] More preferably, the inner block injection mold includes a first front mold, a first rear mold, and a first guide rod. The first front mold is connected to the first rear mold through the first guide rod.

[0007] A better choice is that the first rear mold includes a mold rod assembly, a first runner, an inner block bottom mold, and a first rear mold body. The inner block bottom mold is arranged in the middle of the first rear mold body. The first runner is communicated with the inner block bottom mold. One end of the mold rod assembly is installed on the side of the inner block bottom mold. The inner block bottom mold, the other end of the mold rod assembly, and the first front mold form a mold for the color inner block.

[0008] A better choice is that the mold rod assembly includes a slider, a guide block, and a mold rod. The slider is slidably installed on the first rear mold body through the guide block. One end of the mold rod is installed on the slider, and the other end of the mold rod extends into the inner cavity of the inner block bottom mold.

[0009] A better choice is that it further includes a rod guide block. The rod guide block is located between the inner block bottom mold and the slider, and the mold rod passes through the rod guide block.

[0010] A better choice is that the first front mold is provided with an inner block top mold. Mold rod positioning blocks are arranged on both sides of the inner block top mold. The inner block top mold and the mold rod positioning blocks are both matched with the first rear mold.

[0011] The utility model has the following advantages and beneficial effects compared with the prior art:

[0012] Through the inner block injection mold and the outer block injection mold, the utility model produces small-sized two-color font products through tunnel injection without damaging the aesthetics of the product. The structure of the closed-font two-color mold is simple, convenient for maintenance, and easy to use. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the inner block injection mold of a closed-font two-color mold structure of the utility model;

[0014] Figure 2 is a schematic diagram of the first front mold of the inner block injection mold of a closed-font two-color mold structure of the utility model;

[0015] Figure 3 is Figure 2 a partial enlarged view at F;

[0016] Figure 4 is a schematic diagram of the first rear mold of a closed-font two-color mold structure of the utility model;

[0017] Figure 5 is Figure 4 a partial enlarged view at A of;

[0018] Figure 6 is a schematic diagram of the outer block injection mold of a closed-font two-color mold structure of the utility model;

[0019] Figure 7 It is a schematic diagram of the second front mold of a closed-font two-color mold structure of the present utility model;

[0020] Figure 8 It is Figure 7 The partial enlarged view at position B;

[0021] Figure 9 It is a schematic diagram of the second rear mold of a closed-font two-color mold structure of the present utility model;

[0022] Figure 10 It is Figure 9 The partial enlarged view at position C;

[0023] Figure 11 It is a schematic diagram of the closed two-color font structure of a closed-font two-color mold structure of the present utility model;

[0024] Figure 12 It is a schematic diagram of the closed two-color font structure of a closed-font two-color mold structure of the present utility model;

[0025] Figure 13 It is a top view of the closed two-color font structure of a closed-font two-color mold structure of the present utility model;

[0026] Figure 14 It is Figure 13 The cross-sectional view at position D;

[0027] Figure 15 It is a schematic diagram of the color inner block of a closed-font two-color mold structure of the present utility model;

[0028] Figure 16 It is a schematic diagram of the color inner block of a closed-font two-color mold structure of the present utility model;

[0029] Figure 17 It is a schematic diagram of the color outer block of a closed-font two-color mold structure of the present utility model;

[0030] Figure 18 It is a schematic diagram of the color outer block of a closed-font two-color mold structure of the present utility model;

[0031] Reference numerals of each component in the drawings: 1 - Inner block injection mold; 11 - First front mold; 111 - Mold rod positioning block; 112 - Inner block ejector mold; 12 - First rear mold; 121 - Slide block; 121a - Positioning groove; 122 - Guide block; 123 - Mold rod; 124 - Rod guide block; 125 - First runner; 126 - Inner block bottom mold; 13 - First guide rod; 2 - Outer block injection mold; 21 - Second front mold; 211 - Second upper runner; 212 - Outer block ejector mold; 22 - Second rear mold; 221 - Second lower runner; 222 - Outer block bottom mold; 223 - Annular runner; 23 - Second guide rod; 24 - Second runner; 3 - Closed two-color font structure; 31 - Color inner block; 311 - Font top; 312 - Diverging section; 313 - Horizontal runner; 314 - Vertical runner; 315 - Inner block base; 32 - Color outer block; 321 - Boss portion; 322 - Central filling portion; 323 - Lateral support portion; 324 - Cylindrical portion; 324a - M-shaped through hole. Detailed implementation manners

[0032] The utility model object of the present utility model will be further described in detail below in conjunction with the drawings and specific embodiments. The embodiments cannot be enumerated one by one here, but the implementation manners of the present utility model are not limited to the following embodiments.

[0033] A closed font two-color mold structure includes an inner block injection mold 1 and an outer block injection mold 2. The inner block injection mold 1 is used for primary injection molding of the color inner block 31, and then the color inner block 31 is transferred to the outer block injection mold 2 for secondary injection molding, and the color outer block 32 is added on the basis of the color inner block 31 to obtain the closed two-color font structure 3.

[0034] As Figures 1-5As shown in the figure, the inner block injection mold 1 includes a first front mold 11, four first guide rods 13 and a first rear mold 12. The first front mold 11 includes a mold rod positioning block 111, eight inner block top molds 112 and a first front mold body. The first rear mold 12 includes a mold rod assembly, a first runner 125, an inner block bottom mold 126 and a first rear mold body. The mold rod assembly includes a slider 121, a guide block 122, a mold rod 123 and a rod guide block 124. The first front mold body is connected to the first rear mold body through four first guide rods 13. At the middle part of the first front mold body, there are eight inner block top molds 112 for the color inner blocks 31. The eight inner block top molds 112 are arranged in two columns, with four in each column. Two mold rod positioning blocks 111 are respectively installed on the outer sides of the two columns of inner block top molds 112. Eight inner block bottom molds 126 are installed at the center of the first rear mold body. The eight inner block bottom molds 126 are arranged in two columns, with four in each column, corresponding to the inner block top molds 112 one by one. Two sliders 121 are slidably installed on the sides of the two columns of inner block bottom molds 126 through two guide blocks 122. Both two sliders 121 are provided with positioning grooves 121a, and the mold rod positioning block 111 of the first front mold 11 can be embedded in the positioning grooves 121a. One ends of eight mold rods 123 are respectively installed on the two sliders 121. Each slider 121 is installed with four mold rods 123, and the four mold rods 123 are arranged in a line. The other ends of the eight mold rods 123 pass through the rod guide blocks 124 and are located above the eight inner block bottom molds 126. The rod guide blocks 124 are installed on the first rear mold body, and the mold rods 123 can slide on the rod guide blocks 124. And they are located between the inner block bottom mold 126 and the slider 121. The eight mold rods 123 are divided into two columns, with four in each column, and correspond to the inner block bottom molds 126 one by one. The inner block top molds 112, the mold rods 123 and the inner block bottom molds 126 form the mold for the color inner blocks 31. The molds for the eight color inner blocks 31 are communicated through the first runner 125. The first runner 125 is arranged on the first rear mold body.

[0035] The first front mold 11 and the first rear mold 12 are used for mating injection molding and demolding with each other to realize the injection molding of the color inner blocks 31; the mold rod positioning block 111 restricts and positions the slider 121. The inner block top mold 112 is the upper half part of the mold for the color inner blocks 31; the mold rod assembly is used for the formation of the transverse runner 313 of the color inner blocks 31 during injection molding; the cooperation between the slider 121 and the guide block 122 realizes the horizontal movement of the mold rod 123, which is used for the formation of the transverse runner 313 and convenient demolding; the mold rod 123 is used for forming the transverse runner 313 of the color inner blocks 31. The rod guide block 124 is used for accurately guiding the front end of the mold rod 123 above the inner block bottom mold 126; the first runner 125 allows the plastic to be divided and flow into the molds of each color inner block 31; the inner block bottom mold 126 is the lower half part of the mold for the color inner blocks 31; the first guide rods 13 ensure the mating of the first front mold 11 and the first rear mold 12.

[0036] As Figure 15 and16 As shown, the inner color block 31 includes a font top 311, a diversion part 312, and an inner block base 315. The transverse section of the inner block base 315 is circular. A transverse flow channel 313 is provided at the top of the inner block base 315. The transverse flow channel 313 is divided into two transverse branch channels by the diversion part 312. The top of the diversion part 312 is flush with the top of the inner block base 315. Four grooves are provided at the bottom of the inner block base 315, and a cross reinforcing rib is provided between the four grooves. The bottom of the font top 311 is respectively connected to the diversion part 312 and the inner block base 315. Two longitudinal flow channels 314 are provided on the font top 311.

[0037] The font top 311 serves as a mold for the central filling part 322 of the outer color block 32; the diversion part 312 diverts the plastic into the longitudinal flow channels 314 to form the central filling part 322 of the outer color block 32; the inner block base 315 plays a supporting role and is combined with the outer color block 32; the transverse flow channel 313 allows the plastic in the annular flow channel 223 to flow into the longitudinal flow channels 314; the longitudinal flow channels 314 are used to form the central filling part 322 of the outer color block 32 and serve as a mold.

[0038] As Figures 6-10 shown, the outer block injection mold 2 includes a second front mold 21, a second rear mold 22, and a second guide rod 23. The second front mold 21 includes a second upper flow channel 211, eight outer block top molds 212, and a second front mold 21 body. The second rear mold 22 includes a second lower flow channel 221, eight outer block bottom molds 222, an annular flow channel, and a second rear mold 22 body. The second front mold 21 body is connected to the second rear mold 22 body through the second guide rod 23. The outer block top molds 212 are arranged at the center of the second front mold 21 body. The eight outer block top molds 212 are arranged in two columns, with four in each column. The eight outer block top molds 212 are connected through the second upper flow channel 211. The eight outer block bottom molds 222 are arranged at the center of the second rear mold 22 body. The eight outer block bottom molds 222 are arranged in two columns, with four in each column. The eight inner color blocks 31 are respectively installed on the eight outer block bottom molds 222. The eight outer block bottom molds 222 are connected through the second lower flow channel 221. When the second front mold 21 and the second rear mold 22 are in contact, the outer block top molds 212, the inner color blocks 31, and the outer block bottom molds 222 form a mold for the inner color block 31, and the second upper flow channel 211 and the second lower flow channel 221 form a second flow channel.

[0039] As Figures 11-14As shown, it is a closed-font two-color structure, that is, a mold of the closed-font two-color structure 3 composed of the outer block top mold 212, the color inner block 31, and the outer block bottom mold 222. The outer block top mold 212 and the inner block base 315 of the color inner block 31 form the mold of the cylindrical part 324 of the color outer block 32 (that is, the circumferential runner). The outer block top mold 212, the inner block base 315, and the diversion part 312 form the mold of the transverse support part 323 of the color outer block 32 (that is, the transverse runner 313). The font top 311 and the outer block top mold 212 form the mold of the central filling part 322 of the color outer block 32 (that is, the longitudinal runner 314). The lower end of the circumferential runner is connected to the second runner, the upper end of the circumferential runner is connected to one end of the transverse runner 313, and the other end of the transverse runner 313 communicates with the longitudinal runner 314.

[0040] The second front mold 21 and the second rear mold 22 are used for in-mold injection and demolding to realize the molding of the color outer block 32; the second upper runner 211 is the upper half of the second runner and plays a role in guiding the flow; the outer block top mold 212 is the upper half mold of the color outer block 32; the second lower runner 221 is the lower half of the second runner and plays a role in guiding the flow; the outer block bottom mold 222 is the lower half mold of the color outer block 32; the circumferential runner is used to guide the plastic to the transverse runner 313 and is injection-molded into the cylindrical part 324 of the color outer block 32; the second guide rod 23 plays a guiding role in the alignment of the second front mold 21 and the second rear mold 22. The second runner is used to guide the plastic into the molds of each color outer block 32.

[0041] As Figure 17 and 18 shown, the color outer block 32 includes a boss part 321, a central filling part 322, a transverse support part 323, and a cylindrical part 324. The boss part 321 is connected to the outer periphery of the bottom of the cylindrical part 324. The top of the cylindrical part 324 is provided with an M-shaped through hole 324A. One end of the transverse support part 323 is connected to the inner wall of the cylindrical part 324, and the other end of the transverse support part 323 is connected to the central filling part 322. The central filling part 322 is located within the M-shaped through hole 324A.

[0042] Description of the usage process of the inner block injection mold 1: When the first front mold 11 and the first rear mold 12 are closed, the mold rod positioning block 111 is embedded on the slider 121 of the mold rod assembly and fixes the mold rod assembly. The inner block top mold 112 and the inner block bottom mold 126 are in a closed state. The mold rod 123 of the mold rod assembly is located in the inner cavity formed by the inner block top mold 112 and the block bottom mold 126. Injection molding is carried out through the first runner 125. After the injection molding is completed, the colored inner block 31 is obtained. The diversion part 312 and the transverse runner 313 are formed through the mold rod 123, and the font top 311, the longitudinal runner 314 and the inner block base 315 are formed through the inner block top mold 112. After the injection molding is completed, the first front mold 11 and the first rear mold 12 are separated. The mold rod positioning block 111 slides out from the positioning groove 121a of the slider 121, and the mold rod 123 moves laterally outward from the transverse runner 313 of the colored inner block 31, and then the colored inner block 31 is taken out.

[0043] Description of the usage process of the outer block injection mold 2: The colored inner block 31 is placed into the outer block bottom mold 222 of the second rear mold 22. The second front mold 21 and the second rear mold 22 are closed. The colored inner block 31 and the outer block bottom mold 222 serve as the lower half mold of the colored outer block 32, and the outer block top mold 212 serves as the upper half mold of the colored outer block 32. The upper half mold and the lower half mold are combined to form the mold of the colored outer block 32. Injection molding is started for the mold of the colored outer block 32. The plastic flows through the second runner to the circumferential runner formed by the inner block base 315 of the colored inner block 31 and the outer block top mold 212, forming the cylindrical part 324 and the boss part 321 of the colored outer block 32, then enters the transverse runner 313 of the colored inner block 31 to form the transverse support part 323, and finally enters the longitudinal runner 314 for filling to form the central filling part 322.

[0044] The above specific implementation manners are the preferred embodiments of the present invention and cannot limit the present invention. Any other changes or other equivalent replacement methods made without departing from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A closed font two-color mold structure, characterized by: It includes an inner block injection mold and an outer block injection mold, the inner block injection mold is injection-molded with a color inner block, the color inner block includes a connected inner block base and a font top, the font top is provided with a longitudinal flow channel, the inner block base is provided with a transverse flow channel, the longitudinal flow channel is connected with one end of the transverse flow channel, the outer block injection mold includes a second front mold and a second rear mold, the second front mold is provided with a second upper flow channel and an outer block top mold, the second rear mold includes a second lower flow channel and an outer block bottom mold, the second upper flow channel and the second lower flow channel constitute a second flow channel, the color inner block is installed on the outer block bottom mold, the color inner block and the outer block top mold constitute an annular flow channel, the upper end of the annular flow channel is connected with the other end of the transverse flow channel, and the lower end of the annular flow channel is connected with the second flow channel.

2. According to claim 1, a closed font two-color mold structure, characterized in that: The color inner block also includes a diversion portion, which divides the transverse flow channel into two transverse branch flow channels, one end of the two transverse branch flow channels is respectively connected to the longitudinal flow channel, and the other end of the transverse branch flow channels is connected to the annular flow channel.

3. According to claim 1, a closed font two-color mold structure is characterized by: The inner block injection mold comprises a first front mold, a first rear mold and a first guide rod, and the first front mold is connected to the first rear mold through the first guide rod.

4. According to claim 3, a closed font two-color mold structure is characterized by: The first rear mold includes a mold rod assembly, a first flow channel, an inner block bottom mold and a first rear mold body. The inner block bottom mold is arranged in the middle of the first rear mold body. The first flow channel is connected to the inner block bottom mold. One end of the mold rod assembly is installed on the side of the inner block bottom mold. The inner block bottom mold, the other end of the mold rod assembly and the first front mold constitute a mold of the color inner block.

5. According to claim 4, a closed font two-color mold structure is characterized by: The mold rod assembly includes a slider, a guide block and a mold rod. The slider is slidably mounted on the first rear mold body through the guide block. One end of the mold rod is mounted on the slider, and the other end of the mold rod extends into the inner cavity of the inner block bottom mold.

6. A closed font two-color mold structure according to claim 5, characterized in that: It also includes a rod guide block, which is located between the inner block bottom mold and the sliding block, and the mold rod passes through the rod guide block.

7. According to claim 3, a closed font two-color mold structure is characterized by: The first front mold is provided with an inner block top mold, and mold rod positioning blocks are provided on both sides of the inner block top mold. The inner block top mold and the mold rod positioning blocks are matched with the first rear mold.

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