Mold injection molding mechanism

Abstract

This specification provides a mold injection molding mechanism, including: a first metal part; a second metal part in an annular shape, which is sleeved on the outside of the first metal part, and the second metal part has an outer wall located on the outside and an inner wall located on the inside; the second metal part is provided with a through hole that passes from the outer wall to the inner wall; a plastic part, the plastic part includes a first injection part formed on the first metal part by injection molding and a second injection part penetrated in the through hole of the second metal part. The through hole set on the metal part is simple in design and processing, and is firmly and reliably combined through colloid drainage, and blocks and disperses the heat conduction and thermal expansion effects, thereby effectively ensuring the metal rigidity and strength, improving product deformation, and ensuring the roundness and coaxiality of the product.

Description

Technical Field

[0001] The present application belongs to the field of processing and forming, and in particular relates to a mold injection molding mechanism. Background Art

[0002] In order to connect two mutually nested metal parts together and ensure the strength of the connected mechanism, a mold injection molding method is often used to arrange plastic between the two metal parts, so that the two metal parts are formed in one piece.

[0003] However, studies have shown that the roundness, coaxiality and matching tolerance accuracy of the connected mechanism formed by this method are average and cannot meet some higher predetermined requirements. Summary of the invention

[0004] After repeated research and experiments, the inventors learned that the molding mechanism and molding method in the prior art have the inherent characteristics of metal heat conduction and thermal expansion, and the metal is wrapped by high-temperature molten colloid. After molding and cooling, the product is deformed, and the roundness and coaxiality have large deviations, making it difficult to achieve the predetermined tolerance matching requirements.

[0005] The purpose of the present application is to provide a mold injection molding mechanism with better coaxiality.

[0006] The present application provides a mold injection molding mechanism, comprising:

[0007] a first metal member;

[0008] A second metal member in an annular shape, sleeved on the outer side of the first metal member, the second metal member having an outer side wall located on the outer side and an inner side wall located on the inner side;

[0009] The second metal member is provided with a through hole extending from the outer wall to the inner wall;

[0010] The plastic part includes a first injection-molded part formed on the first metal member by injection molding and a second injection-molded part penetrating in a through hole of the second metal member.

[0011] Preferably, the through hole of the second metal member is located in the middle of the second metal member along the axial direction thereof.

[0012] Preferably, the second metal component is coaxially arranged with the first metal component.

[0013] Preferably, the injection channel of the second injection portion is located outside the second metal component.

[0014] Preferably, it also includes:

[0015] A third metal part, wherein the third metal part is sleeved on the outside of the second metal part, and the third metal part is also provided with a through hole extending in the radial direction, and the plastic part also includes a third injection-molded part formed on the second metal part by injection molding and a fourth injection-molded part penetrating in the through hole of the third metal part.

[0016] Preferably, the injection channel of the third injection part is located outside the third metal part.

[0017] Preferably, the through hole of the third metal component is located in the middle of the third metal component along the axial direction.

[0018] Preferably, the outer side wall of the second metal component has a protrusion extending in the radial direction, and the third injection-molded part is sleeved on the protrusion.

[0019] Preferably, the plastic part further includes a fifth injection-molded part attached to the outer side of the third metal part.

[0020] Preferably, the through holes of the second metal member and the through holes of the third metal member are both plural, and the plural through holes respectively provided on the second metal member and the third metal member are arranged at intervals along the circumferential direction.

[0021] The mold injection molding mechanism in the present application is simple in design and processing by setting a through hole on the metal part. It can drain the colloid and combine firmly and reliably to block and disperse the heat conduction and thermal expansion effects, thereby effectively ensuring the metal stiffness and strength, improving product deformation, and ensuring the roundness and coaxiality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic cross-sectional structure diagram of a mold injection molding mechanism in an embodiment of the present application is shown.

[0024] Figure 2 A three-dimensional schematic diagram of the second metal member in an embodiment of the present application is shown.

[0025] The figure numbers of the above drawings are: 1. first metal part; 2. second metal part; 3. third metal part; 4. through hole; 5. first injection molding part; 6. second injection molding part; 7. third injection molding part; 8. fourth injection molding part; 9. fifth injection molding part. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0027] Reference Figure 1 As shown, the embodiment of the present application discloses a mold injection molding mechanism, comprising:

[0028] A first metal member 1;

[0029] A second metal member 2 in an annular shape, sleeved on the outer side of the first metal member 1, wherein the second metal member 2 has an outer side wall located on the outer side and an inner side wall located on the inner side;

[0030] The second metal member 2 is provided with a through hole 4 penetrating from the outer wall to the inner wall;

[0031] The plastic part includes a first injection-molded part 5 formed on the first metal member 1 by injection molding and a second injection-molded part 6 penetrating the through hole 4 of the second metal member 2 .

[0032] With the above structure, the high-temperature and high-speed molten colloid during mold injection can shorten the glue creeping distance along the axial direction of the second metal part 2 by 1 / 2. The original glue creeping distance of the mold injection molding mechanism in the prior art is the height of the second metal part 2, that is, the colloid needs to climb the height of the second metal part 2 before it can reach the inside of the second metal part 2. After the through hole 4 of the second metal part 2 is processed, the glue creeping reaches the middle position of the second metal part 2, and then overflows radially through the through hole 4 to guide the glue. As the flow and filling speed of the colloid is accelerated, the heat conduction and thermal expansion time of the second metal part 2 is also shortened accordingly.

[0033] Specifically, the first metal member 1 is cylindrical. Of course, in other optional embodiments, the first metal member 1 can be in other shapes according to actual needs. Figure 2 As shown, the second metal member 2 is in a circular ring shape. The second metal member 2 is sleeved on the outside of the first metal member 1. The second metal member 2 has an outer side wall located on the outside and an inner side wall located on the inside.

[0034] The second metal member 2 is provided with a through hole 4 penetrating from the outer wall to the inner wall.

[0035] The plastic part includes a first injection part 5 formed on the first metal member 1 by injection molding and a second injection part 6 penetrating the through hole 4 of the second metal member 2. The first injection part 5 is attached to the outside of the first metal member 1. The second injection part 6 is formed in the through hole 4. In this embodiment, the injection port is located on the outside of the second metal member 2. The colloid forms an isolation part on the outside of the second metal member 2, and enters the space between the first metal member 1 and the second metal member 2 from the through hole 4 of the second metal member 2, and then is formed on the first metal member 1.

[0036] Preferably, the through hole 4 of the second metal member 2 is located in the middle of the second metal member 2 along its axial direction, thereby reducing the climbing distance of the colloid.

[0037] In this embodiment, the through holes 4 of the second metal part 2 are arranged at uniform intervals along the circumferential direction of the second metal part 2. The number of through holes 4 of the second metal part 2 is 8. Although multiple through holes 4 are provided, the second metal part 2 is completely closed, and the stiffness and strength of the second metal part 2 are not affected. Multiple through holes 4 can overflow glue from multiple radial directions to lead glue, so that the colloid flow filling speed is faster than before. Due to the accelerated colloid flow filling speed, the heat conduction and thermal expansion time of the metal part is also shortened accordingly. Multiple through holes 4 can also effectively block the heat conduction and thermal expansion effect of the dispersed metal parts. Part of the concentrated stress is dispersed and guided, while blocking rapid heat conduction. Multiple through holes 4 allow the metal parts to be wrapped by high-temperature molten colloid, and the combination is more complete, more stable and reliable, and the pull-out peeling strength between the colloid and the metal parts is enhanced. Multiple through holes 4 can improve product deformation, and the true roundness and coaxiality are better, meeting the predetermined tolerance adaptation requirements of the project. The original mold is injection-molded and embedded with metal to ensure the stiffness and strength of the metal.

[0038] In a preferred embodiment, the second metal member 2 has an annular convex ring protruding outward. The through hole 4 is provided on the convex ring, thereby ensuring the rigidity and strength of the second metal and ensuring that the deformation of the product is within an allowable range.

[0039] In this embodiment, the size of the second metal member 2 is The size of through hole 4 is

[0040] In a preferred embodiment, the mold injection molding mechanism includes a third metal part 3, the third metal part 3 is sleeved on the outside of the second metal, the third metal part 3 is also provided with a through hole 4 extending in the radial direction, and the plastic part also includes a third injection part 7 formed on the second metal part 2 by injection molding and a fourth injection part 8 penetrated in the through hole 4 of the third metal part 3. In this embodiment, the outer wall of the second metal part 2 has a protrusion extending in the radial direction, and the third injection part 7 is sleeved on the protrusion. The fourth injection part 8 is formed in the through hole 4 of the third metal part 3. In a preferred embodiment, the plastic part also includes a fifth injection part 9 attached to the outside of the third metal part 3 to further reinforce the mold injection molding mechanism and isolate the third metal part 3 from the outside.

[0041] In this embodiment, the glue injection port is located outside the second metal member 2. The glue forms an isolation portion outside the second metal member 2, and enters the space between the first metal member 1 and the second metal member 2 from the through hole 4 of the second metal member 2, and then forms on the first metal member 1.

[0042] The through hole 4 of the third metal part 3 can also shorten the axial creeping distance of the high-temperature and high-speed molten colloid along the third metal part 3 by 1 / 2 during mold injection. The original creeping distance of the mold injection molding mechanism in the prior art is the height of the third metal part 3, that is, the colloid needs to climb the height of the third metal part 3 before it can reach the inside of the third metal part 3. After the through hole 4 of the third metal part 3 is processed, the creeping glue reaches the middle position of the third metal part 3 and then overflows radially through the through hole 4 to guide the glue. As the flow and filling speed of the colloid is accelerated, the heat conduction and thermal expansion time of the third metal part 3 is also shortened accordingly.

[0043] Preferably, the through hole 4 of the third metal member 3 is located in the middle of the third metal member 3 along its axial direction, thereby reducing the climbing distance of the colloid.

[0044] In this embodiment, the through holes 4 of the third metal part 3 are arranged at uniform intervals along the circumferential direction of the third metal part 3. The number of through holes 4 of the third metal part 3 is 8. Although multiple through holes 4 are provided, the third metal part 3 is completely closed, and the stiffness and strength of the third metal part 3 are not affected. Multiple through holes 4 can overflow glue from multiple radial directions to lead glue, so that the colloid flow filling speed is faster than before. Due to the accelerated colloid flow filling speed, the heat conduction and thermal expansion time of the metal part is also shortened accordingly. Multiple through holes 4 can also effectively block the heat conduction and thermal expansion effect of the dispersed metal parts. Part of the concentrated stress is dispersed and guided, while blocking rapid heat conduction. Multiple through holes 4 make the metal parts wrapped by high-temperature molten colloid, the combination is more sufficient, more stable and reliable, and the pull-out peeling strength between the colloid and the metal parts is enhanced. Multiple through holes 4 can improve product deformation, the true roundness and coaxiality are better, and the predetermined tolerance adaptation requirements of the project are met. The original mold is injection-molded and embedded with metal to ensure the stiffness and strength of the metal.

[0045] In summary, whether it is the through hole 4 on the second metal part 2 or the third metal part 3, its design and processing are simple, and it can be firmly and reliably combined through colloid drainage to block and disperse the heat conduction and thermal expansion effects, thereby effectively ensuring the metal stiffness and strength, improving product deformation, and ensuring the roundness and coaxiality of the product.

[0046] In this embodiment, the mold injection molding mechanism can be used to prepare a socket, especially a car socket.

[0047] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present application without departing from the spirit of the present application. It is intended that the attached embodiments include these modifications and changes without departing from the present application.

Claims

1. A mold injection molding mechanism, characterized in that: include: a first metal member; A second metal member in an annular shape, sleeved on the outer side of the first metal member, the second metal member having an outer side wall located on the outer side and an inner side wall located on the inner side; The second metal member is provided with a through hole extending from the outer wall to the inner wall; the through hole of the second metal member is located in the middle of the second metal member along the axial direction thereof; The plastic part includes a first injection-molded part formed on the first metal member by injection molding and a second injection-molded part penetrating in a through hole of the second metal member; an injection molding channel of the second injection-molded part is located outside the second metal member.

2. The mold injection molding mechanism according to claim 1, characterized in that: The second metal component is coaxially arranged with the first metal component.

3. The mold injection molding mechanism according to claim 1, characterized in that: Also includes: A third metal part, wherein the third metal part is sleeved on the outside of the second metal part, and the third metal part is also provided with a through hole extending from the outside to the inside. The plastic part also includes a third injection-molded part formed on the second metal part by injection molding and a fourth injection-molded part penetrating into the through hole of the third metal part.

4. The mold injection molding mechanism according to claim 3, characterized in that: The injection channel of the third injection part is located outside the third metal component.

5. The mold injection molding mechanism according to claim 3, characterized in that: The through hole of the third metal component is located in the middle of the third metal component along the axial direction.

6. The mold injection molding mechanism according to claim 3, characterized in that: The outer side wall of the second metal component has a protrusion extending in the radial direction, and the third injection-molded part is sleeved on the protrusion.

7. The mold injection molding mechanism according to claim 3, characterized in that: The plastic part also includes a fifth injection molding part attached to the outer side of the third metal part.

8. The mold injection molding mechanism according to claim 3, characterized in that: The second metal member has a plurality of through holes and the third metal member has a plurality of through holes, and the plurality of through holes respectively disposed on the second metal member and the third metal member are arranged at intervals along the circumferential direction.

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