Double-injection injection mold

Abstract

The utility model discloses a double-injection injection mold, and relates to the technical field of multi-material injection molds. The double-injection injection mold comprises a male mold, a first female mold and a second female mold, a forming groove is formed in the male mold, a switching hole is formed in the bottom of the forming groove, and the male mold is rotationally provided with a first forming insert core and a second forming insert core; the first female die can be buckled to the male die and drive the first forming insert core to rotate so as to block the switching hole, and the first female die abuts against the first forming insert core so as to form a first injection product with a through hole in the forming groove; the second female die can be buckled to the male die and drive the second forming insert core to rotate so as to block the switching hole, and the second female die, the second forming insert core and the first injection product form a forming cavity so as to form a second injection product in the through hole. According to the double-injection injection mold, the surface smoothness of a double-injection product can be ensured, the appearance of the product is optimized, and the yield of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-material injection molds, and particularly relates to a two-shot injection mold. Background Art

[0002] Since the products manufactured by two-shot injection molds can have two or more plastics on the products, so that the products have better performance, the use of two-shot injection molds is also increasing. Generally speaking, a two-shot injection mold includes a male mold and two female molds. The male mold is provided with insert pins. When one female mold is engaged with the male mold, the female mold abuts against the insert pins and performs a first-shot molding to form a first-shot product with a through hole. Then, the other female mold is engaged with the male mold, and a second-shot product is formed in the through hole of the first-shot product.

[0003] However, when the first female mold abuts against the insert pins, it is easy to damage the end face of the insert pins, resulting in defects such as scratches or pits, which leads to insufficient surface finish of the second-shot product, affects the appearance of the product, and reduces the product yield. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a two-shot injection mold, which can ensure the surface finish of the second-shot product, optimize the appearance of the product, and improve the product yield.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A two-shot injection mold, comprising:

[0007] A male mold, the male mold is provided with a molding groove, a switching hole is opened at the bottom of the molding groove, and a first molding insert and a second molding insert are rotatably arranged on the male mold;

[0008] A first female mold, the first female mold can be engaged with the male mold and drive the first molding insert to rotate to block the switching hole, and the first female mold abuts against the first molding insert to form a first-shot product with a through hole in the molding groove;

[0009] A second female mold, the second female mold can be engaged with the male mold and drive the second molding insert to rotate to block the switching hole, and the second female mold, the second molding insert and the first-shot product form a molding cavity to form a second-shot product in the through hole.

[0010] As an alternative of the above two-shot injection mold, the first molding insert includes a first molding end and a first driving end, and the first female mold can drive the first molding insert to rotate through the first driving end so that the first molding end blocks the switching hole;

[0011] The second forming insert includes a second forming end and a second driving end. The first female mold can drive the second forming insert to rotate through the second driving end so that the second forming end plugs the switching hole.

[0012] As an alternative to the above double-shot injection mold, the first female mold is provided with a first avoidance portion, and the first avoidance portion is configured to avoid the second forming insert.

[0013] The second female mold is provided with a second avoidance portion, and the second avoidance portion is configured to avoid the first forming insert.

[0014] As an alternative to the above double-shot injection mold, the first female mold includes a first female mold body and a first pressing block. The first pressing block is disposed on the first female mold body and is detachably connected to the first female mold body. The first pressing block is configured to drive the first forming insert to rotate.

[0015] The second female mold includes a second female mold body and a second pressing block. The second pressing block is disposed on the second female mold body and is detachably connected to the second female mold body. The second pressing block is configured to drive the second forming insert to rotate.

[0016] As an alternative to the above double-shot injection mold, the first pressing block includes a first pressing portion and a first limiting portion. The first pressing portion passes through the first female mold body and is fixedly connected to the first female mold body. The first limiting portion abuts against the first female mold body so that the first pressing portion is flush with the lower surface of the first female mold body.

[0017] The first pressing block includes a first pressing portion and a first limiting portion. The first pressing portion passes through the first female mold body and is fixedly connected to the first female mold body. The first limiting portion abuts against the first female mold body so that the first pressing portion is flush with the lower surface of the first female mold body.

[0018] As an alternative to the above double-shot injection mold, the first female mold includes a forming protrusion. When the first female mold is engaged with the male mold, the forming protrusion abuts against the first forming insert so that the first-shot product has the through hole.

[0019] As an alternative to the above double-shot injection mold, the male mold further includes two sets of elastic components. One set of the elastic components is configured to drive the first forming insert to rotate away from the switching hole, and the other set of the elastic components is configured to drive the second forming insert to rotate away from the switching hole.

[0020] As an alternative to the above bi-injection mold, the elastic component includes an elastic member and a ejector pin. The ejector pin penetrates through the male mold, and the elastic member is configured to drive the ejector pin to protrude from the male mold. The ejector pins of one group of the elastic components abut against the first molding insert, and the ejector pins of the other group of the elastic components abut against the second molding insert.

[0021] As an alternative to the above bi-injection mold, the first female mold is provided with a glue injection port, and the glue injection port is configured to communicate with the molding groove; the second female mold is provided with two glue injection ports, and the two glue injection ports are configured to communicate with the molding cavity.

[0022] As an alternative to the above bi-injection mold, the male mold is movably arranged so that the male mold can be switched between below the first female mold and below the second female mold.

[0023] Advantages of the present utility model:

[0024] The present utility model provides a bi-injection mold. In this bi-injection mold, when forming the first-shot product, the first molding insert abuts against the first female mold to form a first-shot product with a through hole. Then, the second molding insert blocks the switching hole to form the second-shot product in the through hole of the first-shot product. Since the through hole of the first-shot product is formed by the abutment of the first molding insert and the first female mold, and the second molding insert only serves to block the switching hole to form the second-shot product, the end face of the second molding insert will not be damaged due to abutting against the hard material, reducing mold damage, ensuring the surface finish of the second-shot product, optimizing the product appearance, and improving the product yield. Description of the drawings

[0025] Figure 1 is a schematic structural view of the product provided by the present utility model;

[0026] Figure 2 is a cross-sectional view of the product provided by the present utility model;

[0027] Figure 3 is a schematic structural view of the male mold and one female mold for molding in the prior art of the present utility model;

[0028] Figure 4 is a schematic structural view of the male mold and the other female mold for molding in the prior art of the present utility model;

[0029] Figure 5 is a schematic structural view of the male mold and the first female mold for molding provided by the present utility model;

[0030] Figure 6 is a cross-sectional view of the male mold and the first female mold for molding provided by the present utility model;

[0031] Figure 7 is Figure 6 the partial enlarged view of part A in

[0032] Figure 8 the schematic structural view of the male mold and the second female mold formed by the present utility model;

[0033] Figure 9 the sectional view of the male mold and the second female mold formed by the present utility model;

[0034] Figure 10 is Figure 9 the partial enlarged view of part B in

[0035] In the figure:

[0036] 100, product; 101, first-shot product; 1011, through hole; 102, second-shot product;

[0037] 1, male mold; 11, insert pin; 12, forming groove; 13, switching hole; 14, first forming insert; 141, first driving end; 142, first forming end; 15, second forming insert; 151, second driving end; 152, second forming end; 16, male mold body; 17, insert block; 18, elastic component; 181, elastic member; 182, ejector pin;

[0038] 2, first female mold; 21, first avoiding part; 22, first female mold body; 23, first pressing block; 231, first pressing part; 232, first limiting part; 24, forming protrusion; 25, first-shot gate;

[0039] 3, second female mold; 31, second avoiding part; 32, second female mold body; 33, second pressing block; 331, second pressing part; 332, second limiting part; 34, second-shot gate. Detailed implementation mode

[0040] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model.

[0041] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0042] Unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature is at a lower horizontal height than the second feature.

[0044] The technical solution of the present utility model will be further described below with reference to the drawings and through specific embodiments.

[0045] The bi-injection mold is used to manufacture products made of two or more kinds of plastics, such as Figure 1 and Figure 2 As shown, in this embodiment, a product produced by two kinds of plastics is taken as an example for illustration.

[0046] In the production process of the product 100, two kinds of plastics need to be injection-molded twice. Generally speaking, the part formed by the first injection is called the first-shot product 101, and the part formed by the second injection is called the second-shot product 102. In this embodiment, the first-shot product 101 has a through hole 1011, and the second-shot product 102 is formed in the through hole 1011 of the first-shot product 101, and the second-shot product 102 is a highly transparent light guide column, and the flatness of the end face needs to be ensured to improve the light transmittance.

[0047] As Figure 3 and Figure 4 shown, in order to improve the production efficiency of product 100, generally, a two-shot injection mold includes a male mold 1 and two female molds. The male mold 1 is provided with insert pins 11. When a female mold is engaged with the male mold 1, the female mold abuts against the insert pins 11 to perform the first-shot molding, forming a first-shot product 101 with a through hole 1011. Then, another female mold is engaged with the male mold 1, and a second-shot product 102 is molded in the through hole 1011 of the first-shot product 101.

[0048] However, when molding the first-shot product 101, the end face of the insert pin 11 is easily damaged when the female mold abuts against the insert pin 11, resulting in defects such as scratches or pitting, which leads to insufficient surface finish of the end face of the second-shot product 102, affecting the appearance and light transmittance of product 100 and reducing the yield of product 100.

[0049] As Figures 5 to 10 shown, to solve the above problems, in the two-shot injection mold provided in this embodiment, the male mold 1 is provided with a molding groove 12, and a switching hole 13 is opened at the bottom of the molding groove 12. The male mold 1 is rotatably provided with a first molding insert 14 and a second molding insert 15. For the convenience of description, the two female molds of this two-shot injection mold are respectively referred to as the first female mold 2 and the second female mold 3. The first female mold 2 can be engaged with the male mold 1 and drive the first molding insert 14 to rotate to block the switching hole 13. The first female mold 2 abuts against the first molding insert 14 to mold a first-shot product 101 with a through hole 1011 in the molding groove 12. After the first-shot product 101 is molded, the second female mold 3 can be engaged with the male mold 1 and drive the second molding insert 15 to rotate to block the switching hole 13. The second female mold 3, the second molding insert 15, and the first-shot product 101 form a molding cavity to mold a second-shot product 102 in the through hole 1011.

[0050] In this two-shot injection mold, when molding the first-shot product 101, the first molding insert 14 abuts against the first female mold 2 to form a first-shot product 101 with a through hole 1011. Then, the second molding insert 15 blocks the switching hole 13 to mold a second-shot product 102 in the through hole 1011 of the first-shot product 101. Since the through hole 1011 of the first-shot product 101 is formed by the abutment of the first molding insert 14 and the first female mold 2, and the second molding insert 15 only serves to block the switching hole 13 to mold the second-shot product 102, the end face of the second molding insert 15 will not be damaged due to abutting against hard materials, reducing mold damage, ensuring the surface finish of the second-shot product 102, optimizing the appearance of product 100, and increasing the yield of product 100.

[0051] As Figures 5 to 10As shown, the first female mold 2 is provided with a plastic injection port 25, and a plastic injection port 25 is configured to communicate with the molding groove 12; the second female mold 3 is provided with two plastic injection ports 34, and two plastic injection ports 34 are configured to communicate with the molding cavity. One plastic injection port 25 is used to inject plastic into the molding groove 12 to form a first-shot product 101, and two plastic injection ports 34 are used to inject plastic into the molding cavity of the first-shot product 101 to form a second-shot product 102.

[0052] Generally speaking, in a double-shot injection mold, in order to facilitate the engagement and fitting of the male mold 1 with the first female mold 2 and the second female mold 3, the male mold 1 is movably arranged so that the male mold 1 can be switched between below the first female mold 2 and below the second female mold 3.

[0053] In some embodiments, the male mold 1 is arranged on a turntable, and the position of the male mold 1 is switched by the rotation of the turntable; in this embodiment, the male mold 1 moves linearly, the first female mold 2 and the second female mold 3 are arranged at intervals. After the male mold 1 and the first female mold 2 jointly form a first-shot product 101 below the first female mold 2, it can be moved to below the second female mold 3 to form a second-shot product 102 with the second female mold 3.

[0054] As Figures 5 to 7 shown, the first molding insert 14 includes a first molding end 142 and a first driving end 141. The first female mold 2 can drive the first molding insert 14 to rotate through the first driving end 141 so that the first molding end 142 blocks the switching hole 13. That is to say, when the first female mold 2 is engaged with the male mold 1, the first molding insert 14 can be driven to rotate through the first driving end 141, so that the first molding end 142 abuts against the male mold 1 and blocks the switching hole 13.

[0055] Furthermore, the first female mold 2 includes a molding protrusion 24. When the first female mold 2 is engaged with the male mold 1, the molding protrusion 24 abuts against the first molding insert 14 so that the first-shot product 101 has a through hole 1011. That is to say, the molding protrusion 24 abuts against the first molding end 142 with a protrusion portion having the same shape as the through hole 1011 of the first-shot product 101, so as to be able to form a first-shot product 101 having a through hole 1011.

[0056] Similarly, as Figures 8 to 10 shown, the second molding insert 15 includes a second molding end 152 and a second driving end 151. The first female mold 2 can drive the second molding insert 15 to rotate through the second driving end 151 so that the second molding end 152 blocks the switching hole 13. When the second female mold 3 is engaged with the male mold 1, the second molding insert 15 can be driven to rotate through the second driving end 151, so that the second molding end 152 abuts against the male mold 1 and blocks the switching hole 13, thereby forming a molding cavity on the first-shot product 101, and then being able to form a second-shot product 102 in the molding cavity.

[0057] It can be understood that since the common mold 1 needs to be hollowed out and avoided for the first forming insert 14 and the second forming insert 15, it is easy to cause the part where the forming groove 12 is formed to be too thin and lack strength. And increasing the material strength of the common mold 1 will lead to a substantial increase in cost. To solve the above problems, the common mold 1 includes a common mold body 16 and an insert 17. The insert 17 is fixedly arranged on the common mold body 16. The forming groove 12 and the switching hole 13 are both arranged on the insert 17. The insert 17 can be made of a high-strength material to ensure that the insert 17 will not be damaged during the forming process and improve the service life.

[0058] As Figures 5 to 7 shown, the first forming insert 14 and the second forming insert 15 are symmetrically arranged. To avoid the first female mold 2 contacting the second forming insert 15 when the first female mold 2 is buckled with the common mold 1, the first female mold 2 is provided with a first avoidance portion 21. The first avoidance portion 21 is configured to avoid the second forming insert 15, ensuring that only the first forming insert 14 rotates when the first female mold 2 is buckled with the common mold 1.

[0059] Every time the double-shot injection mold produces a product 100, the first female mold 2 will collide and rub against the first forming insert 14. After long-term use, the first female mold 2 will be difficult to rotate the first forming insert 14 to the position of blocking the switching hole 13 due to wear, thus affecting the yield of the product 100.

[0060] To solve this problem, the first female mold 2 includes a first female mold body 22 and a first pressing block 23. The first pressing block 23 is arranged on the first female mold body 22 and is detachably connected to the first female mold body 22. The first pressing block 23 is configured to drive the first forming insert 14 to rotate.

[0061] It is possible to select an appropriate time to replace the first pressing block 23 according to the wear condition of the first pressing block 23 to ensure the yield of the product 100. Moreover, the first pressing block 23 can be made of a high-strength and high-wear-resistant material to reduce the replacement frequency, thereby improving the production efficiency.

[0062] Further, the first pressing block 23 includes a first pressing portion 231 and a first limiting portion 232. The first pressing portion 231 passes through the first female mold body 22 and is fixedly connected to the first female mold body 22. The first limiting portion 232 abuts against the first female mold body 22 to make the first pressing portion 231 flush with the lower surface of the first female mold body 22. Among them, the first pressing portion 231 is used for fixedly connecting with the first female mold body 22 and driving the first forming insert 14 to rotate by abutting against the first driving end 141, while the first limiting portion 232 can be limited when the first pressing block 23 is installed to ensure the accurate position of the lower end of the first pressing portion 231.

[0063] Specifically, the fixation between the first pressing part 231 and the first female mold body 22 can be achieved by screws or by an interference fit between the first pressing part 231 and the first female mold body 22.

[0064] Similarly, as Figures 8 to 10 shown, in order to prevent the second female mold 3 from contacting the first forming insert 14 when engaging with the male mold 1, the second female mold 3 is provided with a second avoidance part 31, and the second avoidance part 31 is configured to avoid the first forming insert 14, ensuring that only the second forming insert 15 rotates when the second female mold 3 engages with the male mold 1.

[0065] Every time the double-shot injection mold produces a product 100, the second female mold 3 will collide and rub against the second forming insert 15. After long-term use, the second female mold 3 will be worn and it will be difficult to rotate the second forming insert 15 to the position blocking the switching hole 13, thus affecting the yield of the product 100.

[0066] To solve this problem, the second female mold 3 includes a second female mold body 32 and a second pressing block 33. The second pressing block 33 is arranged on the second female mold body 32 and is detachably connected to the second female mold body 32. The second pressing block 33 is configured to drive the second forming insert 15 to rotate.

[0067] It is possible to select an appropriate time to replace the second pressing block 33 according to the wear condition of the second pressing block 33 to ensure the yield of the product 100. Moreover, the second pressing block 33 can be made of high-strength and high-wear-resistant materials to reduce the replacement frequency and thus improve the production efficiency.

[0068] Furthermore, the second pressing block 33 includes a second pressing part 331 and a second limiting part 332. The second pressing part 331 passes through the second female mold body 32 and is fixedly connected to the second female mold body 32. The second limiting part 332 abuts against the second female mold body 32 to make the lower surface of the second pressing part 331 flush with the second female mold body 32. Among them, the second pressing part 331 is used for fixedly connecting with the second female mold body 32 and driving the second forming insert 15 to rotate by abutting against the second driving end 151, while the second limiting part 332 can perform limiting when installing the second pressing block 33 to ensure the accurate position of the lower end of the second pressing part 331.

[0069] Specifically, the fixation between the second pressing part 331 and the second female mold body 32 can be achieved by screws or by an interference fit between the second pressing part 331 and the second female mold body 32.

[0070] In this embodiment, to avoid interference between the first forming insert 14 and the second forming insert 15, and ensure that in the free state of the male mold 1 (when the male mold 1 is not latched with the first female mold 2 or the second female mold 3), the first driving end 141 of the first forming insert 14 and the second driving end 151 of the second forming insert 15 both protrude from the male mold body 16. The male mold 1 further includes two sets of elastic components 18. One set of elastic components 18 is configured to drive the first forming insert 14 to rotate so as to disengage from the switching hole 13, and the other set of elastic components 18 is configured to drive the second forming insert 15 to rotate so as to disengage from the switching hole 13.

[0071] As Figure 6 and Figure 9 shown, the elastic component 18 includes an elastic member 181 and a top pin 182. The top pin 182 penetrates through the male mold 1, and the elastic member 181 is configured to drive the top pin 182 to protrude from the male mold 1. The top pin 182 of one set of elastic components 18 abuts against the first forming insert 14, and the top pin 182 of the other set of elastic components 18 abuts against the second forming insert 15. Among them, the elastic member 181 is a spring, and the top of the top pin 182 is an arc surface, thereby reducing the wear of the top pin 182 on the first forming insert 14 and the second forming insert 15 and improving the service life.

[0072] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A bijective injection mold, characterized in that, Comprising: A male mold (1), the male mold (1) is provided with a molding groove (12), a switching hole (13) is opened at the bottom of the molding groove (12), and a first molding insert (14) and a second molding insert (15) are rotatably arranged on the male mold (1); A first female mold (2), the first female mold (2) can be buckled on the male mold (1) and drive the first molding insert (14) to rotate to block the switching hole (13), and the first female mold (2) abuts against the first molding insert (14) to form a first-shot product (101) with a through hole (1011) in the molding groove (12); A second female mold (3), the second female mold (3) can be buckled on the male mold (1) and drive the second molding insert (15) to rotate to block the switching hole (13), and the second female mold (3), the second molding insert (15) and the first-shot product (101) form a molding cavity to form a second-shot product (102) in the through hole (1011).

2. The bi-injection mold according to claim 1, characterized in that, The first molding insert (14) includes a first molding end (142) and a first driving end (141), and the first female mold (2) can drive the first molding insert (14) to rotate through the first driving end (141) so that the first molding end (142) blocks the switching hole (13); The second molding insert (15) includes a second molding end (152) and a second driving end (151), and the first female mold (2) can drive the second molding insert (15) to rotate through the second driving end (151) so that the second molding end (152) blocks the switching hole (13).

3. The bi-injection mold according to claim 1, characterized in that, The first female mold (2) is provided with a first avoidance portion (21), and the first avoidance portion (21) is configured to avoid the second molding insert (15); The second female mold (3) is provided with a second avoidance portion (31), and the second avoidance portion (31) is configured to avoid the first molding insert (14).

4. The bi-injection mold according to claim 1, characterized in that, The first female mold (2) includes a first female mold body (22) and a first pressing block (23), the first pressing block (23) is arranged on the first female mold body (22) and is detachably connected to the first female mold body (22), and the first pressing block (23) is configured to drive the first molding insert (14) to rotate; The second female mold (3) includes a second female mold body (32) and a second pressing block (33), the second pressing block (33) is arranged on the second female mold body (32) and is detachably connected to the second female mold body (32), and the second pressing block (33) is configured to drive the second molding insert (15) to rotate.

5. The bi-injection mold according to claim 4, characterized in that, The first pressing block (23) includes a first pressing portion (231) and a first limiting portion (232), the first pressing portion (231) passes through the first female mold body (22) and is fixedly connected to the first female mold body (22), and the first limiting portion (232) abuts against the first female mold body (22) so that the first pressing portion (231) is flush with the lower surface of the first female mold body (22); The first pressing block (23) includes a first pressing portion (231) and a first limiting portion (232). The first pressing portion (231) passes through the first female mold body (22) and is fixedly connected to the first female mold body (22). The first limiting portion (232) abuts against the first female mold body (22) to make the first pressing portion (231) flush with the lower surface of the first female mold body (22).

6. The bi-injection mold according to claim 1, wherein The first female mold (2) includes a forming protrusion (24). When the first female mold (2) is buckled with the male mold (1), the forming protrusion (24) abuts against the first forming insert (14) so that the first-shot product (101) has the through hole (1011).

7. The bijective injection mold according to claim 1, characterized in that, The male mold (1) further includes two sets of elastic components (18). One set of the elastic components (18) is configured to drive the first forming insert (14) to rotate to disengage from the switching hole (13), and the other set of the elastic components (18) is configured to drive the second forming insert (15) to rotate to disengage from the switching hole (13).

8. The bi-injection mold according to claim 7, characterized in that, The elastic component (18) includes an elastic member (181) and a top pin (182). The top pin (182) passes through the male mold (1). The elastic member (181) is configured to drive the top pin (182) to protrude from the male mold (1). The top pin (182) of one set of the elastic components (18) abuts against the first forming insert (14), and the top pin (182) of the other set of the elastic components (18) abuts against the second forming insert (15).

9. The bijective injection mold according to claim 1, characterized in that, The first female mold (2) is provided with a first injection port (25), and the first injection port (25) is configured to communicate with the forming groove (12); the second female mold (3) is provided with a second injection port (34), and the second injection port (34) is configured to communicate with the forming cavity.

10. The bijective injection mold according to claim 1, characterized in that, The male mold (1) is movably arranged so that the male mold (1) can be switched between the lower side of the first female mold (2) and the lower side of the second female mold (3).

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