Double-injection mold

Abstract

The utility model relates to a double-injection mold which comprises a male mold and a female mold, the male mold comprises a male mold body, a forming groove is formed in one side of the male mold body, and a first inclined face is formed on the groove wall of the forming groove; the first female die comprises a first female die body, a first female die insert core and a first forming part, the first female die insert core is embedded in the first female die body, the first forming part is arranged at the end, protruding out of the first female die body, of the first female die insert core, and a second inclined plane is formed on the periphery of the first forming part; the second female die comprises a second female die body, a second female die insert core and a second forming part, the second female die insert core is embedded in the second female die body, one end of the second female die insert core protrudes out of the second female die body, the second forming part is arranged at one end of the second female die insert core, and a third inclined plane is formed on the periphery of the second forming part. According to the double-injection mold, the positions of the first female mold and the male mold can be corrected during first-time injection molding, the positions of the second female mold and the male mold can be corrected during second-time injection molding, and the precision of two-time injection molding of an injection molded object is guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to a forming device, in particular to a double-shot mold. BACKGROUND

[0002] At present, a traditional double-shot mold adopts one male mold and two different female molds. After the male mold and one female mold are used to perform first injection molding on an injection-molded object, the male mold is rotated by 180 degrees, and then the male mold and the other female mold are used to perform second injection molding on the injection-molded object. However, since there are machining errors in the male mold and the female molds, the male mold cannot be aligned with the female molds after being rotated, thereby affecting the precision of the second injection molding. CONTENT OF THE UTILITY MODEL

[0003] In view of the above, it is necessary to provide a double-shot mold which can correct the positions of a second female mold and a male mold when performing second injection molding on an injection-molded object, so as to ensure the precision of the second injection molding.

[0004] The embodiment of the application provides a double-shot mold, which comprises a male mold, a first female mold and a second female mold. The male mold comprises a male mold body, and a forming groove for placing an injection-molded object is formed in one side of the male mold body, and a first inclined surface is formed on a groove wall of the forming groove. The first female mold comprises a first female mold body, a first female mold insert and a first forming part. The first female mold insert is embedded in the first female mold body and protrudes from one end of the first female mold body. The first forming part is arranged at the one end of the first female mold insert protruding from the first female mold body. An outer periphery of the first forming part forms a second inclined surface matched with the first inclined surface. When the first female mold and the male mold are combined, the first female mold insert extends into the forming groove through the second inclined surface and the first inclined surface, and the first forming part performs first injection molding on the injection-molded object in the forming groove. The second female mold comprises a second female mold body, a second female mold insert and a second forming part. The second female mold insert is embedded in the second female mold body and protrudes from one end of the second female mold body. The second forming part is arranged at the one end of the second female mold insert protruding from the second female mold body. An outer periphery of the second forming part forms a third inclined surface matched with the first inclined surface. When the second female mold and the male mold are combined, the second female mold insert extends into the forming groove through the third inclined surface and the first inclined surface, and the second forming part performs second injection molding on the injection-molded object in the forming groove.

[0005] In some embodiments, the male mold further comprises a support for supporting the first female mold insert or the second female mold insert. The support is arranged on the male mold body, and the forming groove is formed in a side of the support away from the male mold body.

[0006] In some embodiments, the side wall of the support member is provided with a through hole communicating with the molding groove; the first female mold further includes a first limiting part, which is disposed at one end of the first female mold insert protruding from the first female mold body and connected to one side of the first molding part, and the first limiting part is used to extend into the through hole when the mold is closed; the second female mold further includes a second limiting part, which is disposed at one end of the second female mold insert protruding from the second female mold body and connected to one side of the second molding part, and the second limiting part is used to extend into the through hole when the mold is closed.

[0007] In some embodiments, the first mold further includes a first retaining portion, which is disposed at one end of the first mold insert protruding from the first mold body and connected to one end of the first limiting portion away from the first molding portion; the second mold further includes a second retaining portion, which is disposed at one end of the second mold insert protruding from the second mold body and connected to one end of the second limiting portion away from the second molding portion.

[0008] In some embodiments, the male mold further includes an ejector pin, which is disposed within the male mold body and corresponds to the molding groove, for ejecting the molded object from the molding groove.

[0009] In some embodiments, the male mold further includes a positioning element disposed on one side of the male mold body, the first female mold body having a first positioning groove adapted to the positioning element, and the second female mold body having a second positioning groove adapted to the positioning element.

[0010] In some embodiments, a first receiving groove is formed in the first female mold body, and the first female mold insert is disposed in the first receiving groove and is in clearance fit with the groove wall of the first receiving groove; a second receiving groove is formed in the second female mold body, and the second female mold insert is disposed in the second receiving groove and is in clearance fit with the groove wall of the second receiving groove.

[0011] In some embodiments, the first accommodating groove comprises a first groove and a second groove connected in communication, the cross-sectional area of the second groove is larger than that of the first groove, the first female mold insert comprises a first insert and a second insert connected in communication, the cross-sectional area of the second insert is larger than that of the first insert, the first insert is arranged in the first groove and fits with the groove wall of the first groove in clearance, the second insert is arranged in the second groove and fits with the groove wall of the second groove in clearance, and the first forming part is arranged on the side of the second insert away from the first insert; the second accommodating groove comprises a third groove and a fourth groove connected in communication, the cross-sectional area of the fourth groove is larger than that of the third groove, the second female mold insert comprises a third insert and a fourth insert connected in communication, the cross-sectional area of the fourth insert is larger than that of the third insert, the third insert is arranged in the third groove and fits with the groove wall of the third groove in clearance, the fourth insert is arranged in the fourth groove and fits with the groove wall of the fourth groove in clearance, and the second forming part is arranged on the side of the fourth insert away from the third insert.

[0012] In some embodiments, the first female mold further comprises a first fixing part arranged on the side of the first insert away from the second insert and fixedly connected with the first insert.

[0013] The second female mold further comprises a second fixing part arranged on the side of the third insert away from the fourth insert and fixedly connected with the third insert.

[0014] In some embodiments, the double-shot mold further comprises a ring-shaped water channel arranged on the male mold body and close to the forming groove to cool the injection molding of the injection-molded object.

[0015] When the first female mold and the male mold are closed, the first female mold insert extends into the forming groove through the second slope and the first slope, and the first forming part performs the first injection molding on the injection-molded object in the forming groove; when the second female mold and the male mold are closed, the second female mold insert extends into the forming groove through the third slope and the first slope, and the second forming part performs the second injection molding on the injection-molded object in the forming groove. Therefore, the positions of the first female mold and the male mold can be corrected during the first injection molding, and the positions of the second female mold and the male mold can be corrected during the second injection molding, thereby ensuring the precision of the twice injection molding of the injection-molded object. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the double-shot mold provided by the embodiments of the present application.

[0017] Figure 2 is Figure 1The schematic diagram of the sectional structure of the first cavity mold along the A-A direction in the double-shot mold shown.

[0018] Figure 3 is Figure 1 The schematic diagram of the sectional structure of the first cavity mold along the A-A direction in the double-shot mold shown.

[0019] Figure 4 is Figure 1 The schematic diagram of the sectional structure of the first cavity mold along the A-A direction in the double-shot mold shown.

[0020] Figure 5 is Figure 1 The schematic diagram of the sectional structure of the second cavity mold along the B-B direction in the double-shot mold shown.

[0021] Figure 6 is Figure 1 The schematic diagram of the sectional structure of the second cavity mold along the B-B direction in the double-shot mold shown.

[0022] Main element symbol explanation: double-shot mold 100, male mold 10, male mold body 11, forming groove 111, first inclined surface 1111, support 12, through hole 121, ejector pin 13, positioning member 14, first cavity mold 20, first cavity mold body 21, first accommodating groove 211, first groove 2111, second groove 2112, first positioning groove 212, first cavity mold pin 22, first pin 221, second pin 222, first forming part 23, second inclined surface 231, first limiting part 24, first clamping part 25, first fixing part 26, second cavity mold 30, second cavity mold body 31, second accommodating groove 311, third groove 3111, fourth groove 3112, second positioning groove 312, second cavity mold pin 32, third pin 321, fourth pin 322, second forming part 33, third inclined surface 331, second limiting part 34, second clamping part 35, second fixing part 36, annular waterway 40, injection molded part 200, power symbol structure 210, button contour structure 220. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application.

[0024] In the description of the present application, it needs to be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, it needs to be explained that the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0025] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other, it can be direct connection, or indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0026] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] Please refer to Figure 1 and Figure 2 The embodiments of the present application provide a double-shot mold 100 for twice injection molding of an injection molded object to obtain an injection molded part 200, wherein the injection molded part 200 is a power button, the structure of the first injection molding is a power symbol structure 210, and the structure of the second injection molding is a button contour structure 220 of the power button. Specifically, the double-shot mold 100 includes a male mold 10, a first female mold 20 and a second female mold 30.

[0028] The male mold 10 includes a male mold body 11, which is plate-shaped. One side of the male mold body 11 is provided with a forming groove 111 for placing the injection molded object. The forming groove 111 is a cylindrical groove, and the groove wall of the forming groove 111 forms a first inclined surface 1111. In the present embodiment, the first inclined surface 1111 is an annular inclined surface structure, and the included angle between the first inclined surface 1111 and the direction perpendicular to the groove bottom of the forming groove 111 is 3 degrees.

[0029] Please refer to Figure 3 and Figure 4, the first female mold 20 comprises a first female mold body 21, a first female mold insert 22 and a first forming part 23, the first female mold body 21 is plate-shaped, the first female mold insert 22 is embedded in the first female mold body 21 and protrudes from one end of the first female mold body 21, and the first forming part 23 is arranged at the end of the first female mold insert 22 protruding from the first female mold body 21, the outer periphery of the first forming part 23 forms a second inclined surface 231 matched with the first inclined surface 1111, when the first female mold 20 and the male mold 10 are closed, the first female mold insert 22 extends into the forming groove 111 through the second inclined surface 231 and the first inclined surface 1111, and the first forming part 23 performs the first injection molding on the injection material in the forming groove 111. In this embodiment, the first forming part 23 is a structure matched with the power symbol structure 210, and the power symbol structure 210 can be generated in the first injection molding.

[0030] Please see Figure 5 and Figure 6 , the second female mold 30 comprises a second female mold body 31, a second female mold insert 32 and a second forming part 33, the second female mold body 31 is plate-shaped, the second female mold insert 32 is embedded in the second female mold body 31 and protrudes from one end of the second female mold body 31, and the second forming part 33 is arranged at the end of the second female mold insert 32 protruding from the second female mold body 31, the outer periphery of the second forming part 33 forms a third inclined surface 331 matched with the first inclined surface 1111, when the second female mold 30 and the male mold 10 are closed, the second female mold insert 32 extends into the forming groove 111 through the third inclined surface 331 and the first inclined surface 1111, and the second forming part 33 performs the second injection molding on the injection material in the forming groove 111. In this embodiment, the second forming part 33 is a structure matched with the button contour structure 220, and the button contour structure 220 can be generated in the second injection molding.

[0031] The double injection mold 100 described above is used as follows: when the first female mold 20 and the male mold 10 are closed, the first female mold insert 22 extends into the forming groove 111 through the second inclined surface 231 and the first inclined surface 1111, and the first forming part 23 performs the first injection molding on the injection material in the forming groove 111; when the second female mold 30 and the male mold 10 are closed, the second female mold insert 32 extends into the forming groove 111 through the third inclined surface 331 and the first inclined surface 1111, and the second forming part 33 performs the second injection molding on the injection material in the forming groove 111. Therefore, the positions of the first female mold 20 and the male mold 10 can be corrected in the first injection molding, and the positions of the second female mold 30 and the male mold 10 can be corrected in the second injection molding, thereby ensuring the precision of the injection material in the two injection moldings.

[0032] Please see Figure 2In some embodiments, the male mold 10 further comprises a support 12 for supporting the first female mold insert 22 or the second female mold insert 32, the support 12 is substantially a block structure, and the support 12 is arranged on the male mold body 11, and the forming groove 111 is formed on the side of the support 12 away from the male mold body 11.

[0033] Please refer to Figure 4 and Figure 6 In some embodiments, the sidewall of the support 12 is provided with a through hole 121 in communication with the forming groove 111; the first female mold 20 further comprises a first limiting part 24, the first limiting part 24 is strip-shaped, and the first limiting part 24 is arranged on the end of the first female mold insert 22 protruding out of the first female mold body 21 and connected to one side of the first forming part 23, and the first limiting part 24 is used for extending into the through hole 121 when the mold is closed; the second female mold 30 further comprises a second limiting part 34, the second limiting part 34 is strip-shaped, and the second limiting part 34 is arranged on the end of the second female mold insert 32 protruding out of the second female mold body 31 and connected to one side of the second forming part 33, and the second limiting part 34 is used for extending into the through hole 121 when the mold is closed. In this way, since the first limiting part 24 can extend into the through hole 121 when the mold is closed, the through hole 121 can limit the position of the first limiting part 24, thereby ensuring the position degree of the first forming part 23; since the second limiting part 34 can also extend into the through hole 121 when the mold is closed, the through hole 121 can also limit the position of the second limiting part 34, thereby ensuring the position degree of the second forming part 33.

[0034] In some embodiments, the first female mold 20 further comprises a first clamping part 25, the first clamping part 25 is strip-shaped, and the first clamping part 25 is arranged on the end of the first female mold insert 22 protruding out of the first female mold body 21 and connected to the end of the first limiting part 24 away from the first forming part 23. In this way, the first clamping part 25 can be clamped outside the support 12 when the mold is closed, which can further ensure the position degree of the first forming part 23 when the mold is closed. The second female mold 30 further comprises a second clamping part 35, the second limiting part 34 is strip-shaped, and the second clamping part 35 is arranged on the end of the second female mold insert 32 protruding out of the second female mold body 31 and connected to the end of the second limiting part 34 away from the second forming part 33, in this way, the second clamping part 35 can be clamped outside the support 12 when the mold is closed, which can further ensure the position degree of the second forming part 33 when the mold is closed.

[0035] In some embodiments, the male mold 10 further comprises a ejector rod 13 arranged in the male mold body 11 and corresponding to the forming groove 111, for ejecting the molded injection-molded product out of the forming groove 111. By arranging the ejector rod 13, the injection-molded product can be ensured to be ejected out of the forming groove 111 after molding, thereby ensuring the smooth demolding of the injection-molded product.

[0036] In some embodiments, the male mold 10 further comprises positioning members 14 arranged on one side of the male mold body 11, the first female mold body 21 is provided with first positioning grooves 212 adapted to the positioning members 14, and the second female mold body 31 is provided with second positioning grooves 312 adapted to the positioning members 14. In the present embodiment, the positioning members 14 are four block structures and are arranged at four corners of the male mold body 11 respectively; correspondingly, the four first positioning grooves 212 are also arranged at four corners of the first female mold body 21 respectively, and the four second positioning grooves 312 are also arranged at four corners of the second female mold body 31 respectively.

[0037] In some embodiments, the first female mold body 21 is provided with a first accommodating groove 211, and the first female mold insert 22 is arranged in the first accommodating groove 211 and gap-fitted with the groove wall of the first accommodating groove 211, so that the first female mold insert 22 can move adaptively in the first accommodating groove 211 during mold closing, thereby ensuring the position degree of the first forming part 23; the second female mold body 31 is provided with a second accommodating groove 311, and the second female mold insert 32 is arranged in the second accommodating groove 311 and gap-fitted with the groove wall of the second accommodating groove 311, so that the second female mold insert 32 can move adaptively in the second accommodating groove 311 during mold closing, thereby ensuring the position degree of the second forming part 33.

[0038] In some embodiments, the first accommodating groove 211 comprises a first groove 2111 and a second groove 2112 connected in communication, the first groove 2111 and the second groove 2112 are both cuboid-shaped grooves, the first groove 2111 and the second groove 2112 are coaxially arranged, the cross-sectional area of the second groove 2112 is greater than that of the first groove 2111, the first female mold sprue 22 comprises a first sprue 221 and a second sprue 222 connected in communication, the first sprue 221 and the second sprue 222 are both cuboid-shaped, the first sprue 221 and the second sprue 222 are coaxially arranged, the cross-sectional area of the second sprue 222 is greater than that of the first sprue 221, the first sprue 221 is arranged in the first groove 2111 and gap-fitted with the groove wall of the first groove 2111, the second sprue 222 is arranged in the second groove 2112 and gap-fitted with the groove wall of the second groove 2112, and the first forming part 23 is arranged on the side of the second sprue 222 away from the first sprue 221; the second accommodating groove 311 comprises a third groove 3111 and a fourth groove 3112 connected in communication, the third groove 3111 and the fourth groove 3112 are both cuboid-shaped grooves, the third groove 3111 and the fourth groove 3112 are coaxially arranged, the cross-sectional area of the fourth groove 3112 is greater than that of the third groove 3111, the second female mold sprue 32 comprises a third sprue 321 and a fourth sprue 322 connected in communication, the third sprue 321 and the fourth sprue 322 are both cuboid-shaped, the third sprue 321 and the fourth sprue 322 are coaxially arranged, the cross-sectional area of the fourth sprue 322 is greater than that of the third sprue 321, the third sprue 321 is arranged in the third groove 3111 and gap-fitted with the groove wall of the third groove 3111, the fourth sprue 322 is arranged in the fourth groove 3112 and gap-fitted with the groove wall of the fourth groove 3112, and the second forming part 33 is arranged on the side of the fourth sprue 322 away from the third sprue 321.

[0039] In some embodiments, the first female mold 20 further comprises a first fixing part 26 arranged on the side of the first sprue 221 away from the second sprue 222 and fixedly connected with the first sprue 221. The second female mold 30 further comprises a second fixing part 36 arranged on the side of the third sprue 321 away from the fourth sprue 322 and fixedly connected with the third sprue 321. In this embodiment, the first fixing part 26 is two cylindrical structures and is arranged on the side of the first sprue 221 away from the second sprue 222. The second fixing part 36 is two cylindrical structures and is arranged on the side of the third sprue 321 away from the fourth sprue 322.

[0040] In some embodiments, the double-shot mold 100 further comprises an annular water channel 40 arranged on the male mold body 11 and close to the forming groove 111 to cool the injection molding of the injection-molded object.

[0041] The implementation process of the double-shot mold 100 of the embodiments of the present application is as follows:

[0042] When the first female mold 20 and the male mold 10 are closed, the first female mold insert 22 extends into the forming groove 111 through the second slope 231 and the first slope 1111, and in the process of extending, the positioning member 14 first extends into the first positioning groove 212 to position the first female mold body 21, then the first limiting part 24 extends into the through hole 121 and is clamped by the first clamping part 25 outside the supporting member 12, and then the first forming part 23 performs the first injection molding on the injected material in the forming groove 111.

[0043] The first female mold 20 is removed and the second female mold 30 is closed;

[0044] When the second female mold 30 and the male mold 10 are closed, the second female mold insert 32 extends into the forming groove 111 through the third slope 331 and the first slope 1111, and in the process of extending, the positioning member 14 first extends into the second positioning groove 312 to position the second female mold body 31, then the second limiting part 34 extends into the through hole 121 and is clamped by the second clamping part 35 outside the supporting member 12, and then the second forming part 33 performs the second injection molding on the injected material in the forming groove 111;

[0045] Finally, the injected material after forming is pushed out of the forming groove 111 by the ejector rod 13.

[0046] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application.

[0047] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0048] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application.

Claims

1. A two-shot mold characterized in that, The utility model relates to a two-step injection moulding device, comprising: a male mould comprising a male mould body, one side of the male mould body being provided with a forming groove for placing an injection-moulded object, a groove wall of the forming groove forming a first inclined surface; a first female mould comprising a first female mould body, a first female mould insert and a first forming part, the first female mould insert being embedded in the first female mould body and having one end protruding out of the first female mould body, the first forming part being arranged at one end of the first female mould insert protruding out of the first female mould body, an outer periphery of the first forming part forming a second inclined surface matching the first inclined surface, when the first female mould and the male mould are combined, the first female mould insert extends into the forming groove through the second inclined surface and the first inclined surface, and the first forming part performs first injection moulding on the injection-moulded object in the forming groove; a second female mould comprising a second female mould body, a second female mould insert and a second forming part, the second female mould insert being embedded in the second female mould body and having one end protruding out of the second female mould body, the second forming part being arranged at one end of the second female mould insert protruding out of the second female mould body, an outer periphery of the second forming part forming a third inclined surface matching the first inclined surface, when the second female mould and the male mould are combined, the second female mould insert extends into the forming groove through the third inclined surface and the first inclined surface, and the second forming part performs second injection moulding on the injection-moulded object in the forming groove.

2. The bi-injection mold of claim 1, wherein, The male mould further comprises a support for supporting the first female mould insert or the second female mould insert, the support being arranged in the male mould body, and the forming groove being formed on a side of the support away from the male mould body.

3. The bi-mold as defined in claim 2, wherein, A side wall of the support is provided with a through hole communicating with the forming groove; The first female mould further comprises a first limiting part arranged at one end of the first female mould insert protruding out of the first female mould body and connected to one side of the first forming part, the first limiting part being used for extending into the through hole when the moulds are combined; The second female mould further comprises a second limiting part arranged at one end of the second female mould insert protruding out of the second female mould body and connected to one side of the second forming part, the second limiting part being used for extending into the through hole when the moulds are combined.

4. The bi-mold of claim 3, wherein, The first female mould further comprises a first clamping part arranged at one end of the first female mould insert protruding out of the first female mould body and connected to one end of the first limiting part away from the first forming part; The second female mould further comprises a second clamping part arranged at one end of the second female mould insert protruding out of the second female mould body and connected to one end of the second limiting part away from the second forming part.

5. The bi-mold of claim 1, wherein, The male mould further comprises a ejector rod arranged in the male mould body and corresponding to the forming groove, for ejecting the injection-moulded object out of the forming groove after moulding.

6. The bi-mold of claim 1, wherein, The male mould further comprises a positioning member arranged on one side of the male mould body, the first female mould body being provided with a first positioning groove matching the positioning member, and the second female mould body being provided with a second positioning groove matching the positioning member.

7. The bi-mold of claim 1, wherein, The first female mold body is provided with a first accommodating groove, and the first female mold insert is arranged in the first accommodating groove and in gap fit with the groove wall of the first accommodating groove; The second female mold body is provided with a second accommodating groove, and the second female mold insert is arranged in the second accommodating groove and in gap fit with the groove wall of the second accommodating groove.

8. The bi-mold of claim 7, wherein, The first accommodating groove comprises a first groove and a second groove in communication, the cross-sectional area of the second groove is larger than that of the first groove, the first female mold insert comprises a first insert and a second insert in communication, the cross-sectional area of the second insert is larger than that of the first insert, the first insert is arranged in the first groove and in gap fit with the groove wall of the first groove, the second insert is arranged in the second groove and in gap fit with the groove wall of the second groove, and the first forming part is arranged on the side of the second insert away from the first insert. The second accommodating groove comprises a third groove and a fourth groove in communication, the cross-sectional area of the fourth groove is larger than that of the third groove, the second female mold insert comprises a third insert and a fourth insert in communication, the cross-sectional area of the fourth insert is larger than that of the third insert, the third insert is arranged in the third groove and in gap fit with the groove wall of the third groove, the fourth insert is arranged in the fourth groove and in gap fit with the groove wall of the fourth groove, and the second forming part is arranged on the side of the fourth insert away from the third insert.

9. The bi-mold of claim 8, wherein, The first female mold further comprises a first fixing part arranged on the side of the first insert away from the second insert and fixedly connected with the first insert; The second female mold further comprises a second fixing part arranged on the side of the third insert away from the fourth insert and fixedly connected with the third insert.

10. The bi-mold of claim 1, wherein, The double injection mold further comprises an annular water channel arranged on the male mold body and close to the forming groove to cool the injection molding of the injection-molded object.

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