Mold angle ejector mechanism and injection mold

Abstract

The invention belongs to the technical field of injection molds, and discloses a mold pitched roof mechanism and an injection mold. The mold pitched roof mechanism comprises a pitched roof rod and an auxiliary supporting assembly, the pitched roof rod is provided with a pitched roof face, and when mold closing is conducted, an elastic device applies first elastic force close to a lower mold in the first direction to the pitched roof rod; the auxiliary supporting assembly is arranged on the angle ejector rod and provided with a supporting face, in the first direction, the distance between the supporting face and the lower mold is smaller than the distance between the angle ejector face and the lower mold, and when the angle ejector face and the supporting face abut against the lower mold, the auxiliary supporting assembly elastically deforms; and second elastic force far away from the lower mold in the first direction is applied to the angle ejector rod. According to the auxiliary supporting assembly of the mold pitched roof mechanism, the first elastic force of the elastic device on the pitched roof rod can be weakened, and then the pressure between the lower mold and the pitched roof surface is reduced, so that the abrasion between the pitched roof surface and the lower mold is weakened to a great extent, and the quality of a formed product is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a mold tilting mechanism and an injection mold. Background Art

[0002] The mold inclined ejector, also known as the inclined tip or the rocker arm, is a mechanism used in mold design to form the internal hook of the product. It also has an ejection function and is usually suitable for undercut products with simpler structures such as clips.

[0003] In the existing inclined top design, when the mold is closed, the top surface of the inclined top will directly contact the mold core surface of the rear mold core and produce sliding friction. When the pressure between the inclined top and the rear mold core is large, it will cause wear on the inclined top surface and the mold core surface. Severe cases will damage the inclined top and the rear mold core, thereby affecting the quality of the product. Summary of the invention

[0004] The object of the present invention is to provide a mold tilting mechanism and an injection mold, which can reduce the damage to the mold core surface of the lower mold and improve the quality of the molded product.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The mold tilting mechanism includes:

[0007] An inclined ejector rod, wherein the inclined ejector rod is provided with an inclined top surface, and when the mold is closed, the elastic device applies a first elastic force to the inclined ejector rod along a first direction close to the lower mold;

[0008] An auxiliary supporting assembly is arranged on the inclined ejector rod, and the auxiliary supporting assembly is provided with a supporting surface; along the first direction, the distance between the supporting surface and the lower mold is smaller than the distance between the inclined top surface and the lower mold, and when the inclined top surface and the supporting surface are both in contact with the lower mold, the auxiliary supporting assembly elastically deforms to apply a second elastic force to the inclined ejector rod along the first direction away from the lower mold.

[0009] Preferably, the auxiliary support assembly includes a support rod and an elastic connecting shaft, the elastic connecting shaft is arranged on the inclined push rod, the support rod is arranged on the elastic connecting shaft, the support rod has the support surface, and the elastic connecting shaft can undergo elastic deformation to apply the second elastic force to the inclined push rod.

[0010] Preferably, two support rods are provided, the elastic connecting shaft is passed through the inclined ejector rod, and the two support rods are respectively provided at two ends of the elastic connecting shaft passing through the inclined ejector rod.

[0011] Preferably, the auxiliary support assembly further comprises a limit pin, a through hole is formed on the support rod, and the limit pin is arranged at the end of the elastic connecting shaft passing through the through hole.

[0012] Preferably, the through hole extends along a second direction on the supporting rod, and the second direction is perpendicular to the first direction.

[0013] Preferably, the surface of the lower mold used for contacting with the inclined top surface is a mold core surface;

[0014] The mold tilting mechanism also includes a pad, which is arranged on the lower mold and has an abutment slope, which smoothly extends from the first end to the second end; along the first direction, the first end is close to the tilted top surface relative to the mold core surface, and the second end is flush with the mold core surface.

[0015] Preferably, the abutting inclined surface is a plane.

[0016] Preferably, a chip collecting hole for accommodating debris is provided on the abutting inclined surface.

[0017] Preferably, a chip collecting groove for accommodating chips is provided on the inclined ejector rod.

[0018] The injection mold comprises an upper mold, an elastic device, a lower mold and the above-mentioned mold tilting mechanism, wherein the tilting rod abuts against the upper mold through the elastic device.

[0019] The beneficial effects of the present invention are:

[0020] The mold lift mechanism provided by the present invention has a lift rod with a lift surface, which is used to abut against the lower mold to form the product on the lower mold; an auxiliary support assembly is provided on the lift rod, and the auxiliary support assembly has a support surface. Since the distance between the support surface and the lower mold in the height direction is smaller than the distance between the lift surface and the lower mold, when the lower mold approaches the lift rod vertically for mold closing, the support surface will first abut against the lower mold, and then, under the drive of the lower mold, the auxiliary support assembly will apply a second elastic force to the lift rod and drive the lift rod to move upward, while the lift surface does not abut against the lower mold; As the inclined ejector rod moves upward, the elastic device on the top of the inclined ejector rod is gradually compressed and the first elastic force acting on the inclined ejector rod is gradually increased. When the first elastic force is greater than the second elastic force, the lower mold will further compress the auxiliary support assembly and abut it against the inclined top surface, thereby completing the mold closing. In this process, the inclined ejector rod is subjected to the first elastic force and the second elastic force in opposite directions, that is, the auxiliary support assembly can offset a part of the first elastic force, thereby reducing the pressure between the lower mold and the inclined top surface, thereby greatly reducing the wear of the inclined top surface and the lower mold, and effectively improving the quality of the molded product.

[0021] The injection mold provided by the present invention comprises an upper mold, an elastic device, a lower mold and the above-mentioned mold inclined ejector mechanism. The injection mold can reduce the wear on the inclined ejector rod and the mold core surface during mold closing and mold opening, and prevent the mold core surface and the inclined ejector surface from being poorly sealed due to wear, thereby ensuring the yield of the injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an injection mold provided by a specific embodiment of the present invention;

[0023] Figure 2 It is an assembly diagram of the inclined ejector rod, the auxiliary support assembly and the lower mold provided by the specific embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of a cushion block provided in a specific embodiment of the present invention.

[0025] In the figure:

[0026] 100- elastic device;

[0027] 200- upper mold;

[0028] 300-lower mold; 310-mold core surface;

[0029] 1- inclined ejector rod; 11- chip collecting groove;

[0030] 2- auxiliary support assembly; 21- support rod; 211- perforation; 22- elastic connecting shaft;

[0031] 3- pad; 31- abutting inclined surface; 32- chip collecting hole. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] like Figure 1 and Figure 2As shown, the present invention provides a mold tilting mechanism, which includes a tilting rod 1 and an auxiliary support assembly 2. The tilting rod 1 is provided with a tilting surface. When the mold is closed, the elastic device 100 applies a first elastic force to the tilting rod 1 along a first direction close to the lower mold 300; the auxiliary support assembly 2 is arranged on the tilting rod 1, and the auxiliary support assembly 2 is provided with a supporting surface; along the first direction, the distance between the supporting surface and the lower mold 300 is smaller than the distance between the tilting surface and the lower mold 300. When the tilting surface and the supporting surface are both in contact with the lower mold 300, the auxiliary support assembly 2 elastically deforms and applies a second elastic force to the tilting rod 1 along the first direction away from the lower mold 300. In this embodiment, an inclined top surface is provided on the inclined ejector rod 1, and the inclined top surface is used to abut against the lower mold 300 to form the product on the lower mold 300; an auxiliary support assembly 2 is provided on the inclined ejector rod 1, and the auxiliary support assembly 2 has a support surface. Since the distance between the support surface and the lower mold 300 in the height direction is smaller than the distance between the inclined top surface and the lower mold 300, when the lower mold 300 approaches the inclined ejector rod 1 vertically for mold closing, the support surface will first abut against the lower mold 300, and then, under the drive of the lower mold 300, the auxiliary support assembly 2 will apply a second elastic force to the inclined ejector rod 1 and drive the inclined ejector rod 1 to move upward, while the inclined top surface does not abut against the lower mold 3 00 abutment; as the inclined ejector 1 moves upward, the elastic device 100 at the top of the inclined ejector 1 is gradually compressed, and the first elastic force on the inclined ejector 1 is gradually increased. When the first elastic force is greater than the second elastic force, the lower mold 300 will further compress the auxiliary support assembly 2 and abut against the inclined top surface, thereby completing the mold closing; in this process, the inclined ejector 1 is subjected to the first elastic force and the second elastic force in opposite directions, that is, the auxiliary support assembly 2 can offset a part of the first elastic force, thereby reducing the pressure between the lower mold 300 and the inclined top surface, thereby greatly reducing the wear of the inclined top surface and the lower mold 300, and effectively improving the quality of the molded product. Specifically, the elastic device 100 is a compression spring, and the elastic device 100 is arranged on the upper mold 200, and the top of the inclined ejector 1 abuts against the elastic device 1.

[0037] Furthermore, if Figure 2 As shown, the auxiliary support assembly 2 includes a support rod 21 and an elastic connecting shaft 22, the elastic connecting shaft 22 is arranged on the inclined ejector rod 1, the support rod 21 is arranged on the elastic connecting shaft 22, the support rod 21 has a support surface, and the elastic connecting shaft 22 can be elastically deformed to apply a second elastic force to the inclined ejector rod 1. In this embodiment, the elastic connecting shaft 22 is arranged on the inclined ejector rod 1, and the elastic connecting shaft 22 is made of an elastic material, has a certain toughness and elasticity, and when the elastic connecting shaft 22 is subjected to a force in the first direction, it can be elastically deformed to a certain extent, thereby applying an elastic force to the inclined ejector rod 1.

[0038] Specifically, Figure 2As shown, two support rods 21 are provided, and the elastic connecting shaft 22 is passed through the inclined ejector rod 1. The two support rods 21 are respectively provided at both ends of the elastic connecting shaft 22 passing through the inclined ejector rod 1. In this embodiment, two support rods 21 are provided, and the two support rods 21 are provided on both sides of the inclined ejector rod 1 through the elastic connecting shaft 22; when the lower mold 300 presses the auxiliary support assembly 2 upward, the two support rods 21 can ensure that the inclined ejector rod 1 is subjected to uniform and stable force.

[0039] Specifically, the auxiliary support assembly 2 further includes a stop pin, a through hole 211 is provided on the support rod 21, and the stop pin is arranged at the end of the elastic connection shaft 22 passing through the through hole 211. In this embodiment, the stop pin is arranged at the end of the elastic connection shaft 22 passing through the through hole 211, so as to prevent the support rod 21 from coming off the elastic connection shaft 22. Specifically, the stop pin is detachably connected to the elastic connection shaft 22, and the support rod 21 is also detachably connected to the elastic connection shaft 22, so as to facilitate replacement and maintenance of the support rod 21. Specifically, the elastic connection shaft 22 is matched with the through hole 211 and is penetrated in the through hole 211, so that the support rod 21 can always move synchronously with the elastic connection shaft 22 in the first direction.

[0040] Specifically, Figure 2 As shown, the through hole 211 extends along the second direction on the support rod 21, and the second direction is perpendicular to the first direction. In this embodiment, the surface on the lower mold 300 used to abut against the inclined top surface is the mold core surface 310. When the inclined ejector rod 1 is pressed by the lower mold 300 along the first direction, it will move obliquely at a certain angle with the mold core surface 310 under the limitation of the upper mold 200, that is, the inclined ejector rod 1 does not move along the first direction, and the movement of the inclined ejector rod 1 can be decomposed into movement along the first direction and along the second direction, wherein the second direction is perpendicular to the first direction; specifically, the elastic connecting shaft 22 will also make the same movement as the inclined ejector rod 1 under the drive of the inclined ejector rod 1, so the through hole 211 extending along the second direction can meet the movement trajectory and movement space of the elastic connecting shaft 22.

[0041] Furthermore, if Figure 2 and Figure 3As shown, the surface of the lower mold 300 used to abut against the inclined top surface is the mold core surface 310; the mold inclined top mechanism also includes a pad 3, which is arranged on the lower mold 300, and has an abutting inclined surface 31, which smoothly extends from the first end to the second end; along the first direction, the first end is close to the inclined top surface relative to the mold core surface 310, and the second end is flush with the mold core surface 310. In this embodiment, the pad 3 is arranged on the lower mold 300, the first end of the abutting inclined surface 31 protrudes from the mold core surface 310, and the second end is flush with the mold core surface 310, and the inclination direction of the abutting inclined surface 31 is the same as the direction of the partial movement of the inclined top rod 1 in the second direction, that is, when the inclined top surface is pressed by the lower mold 300, it first abuts against the first end, and then as the inclined top rod 1 moves, the inclined top surface slides on the abutting inclined surface 31 and finally abuts against the mold core surface 310 through the second end, thereby achieving mold closing. Specifically, the design of the abutment bevel 31 reduces the contact time between the inclined top surface and the mold core surface 310, thereby greatly reducing the friction damage to the mold core surface 310. At the same time, since the second end is flush with the mold core surface 310, it is ensured that the abutment bevel 31 can eventually abut against the mold core surface 310.

[0042] Specifically, Figure 3 As shown, the abutting inclined surface 31 is a plane. In this embodiment, the abutting inclined surface 31 is a flat surface, so that the inclined ejector rod 1 can move smoothly thereon, thereby ensuring the stability of the mold closing process.

[0043] Specifically, a chip collecting hole 32 for accommodating chips is provided on the abutting inclined surface 31, and a chip collecting groove 11 for accommodating chips is provided on the inclined ejector rod 1. In this embodiment, the chip collecting hole 32 and the chip collecting groove 11 are both used to accommodate chips dropped from the product during the mold closing process to prevent the chips from affecting the product molding, thereby improving the production quality of the product.

[0044] Specifically, the pad 3 is made of wear-resistant material, thereby extending the service life.

[0045] This embodiment also provides an injection mold, which includes an upper mold 200, an elastic device 100, a lower mold 300 and the above-mentioned mold lift mechanism, and the lift rod 1 is in contact with the upper mold 200 through the elastic device 100. Specifically, the lift rod 1 is arranged on the upper mold 200 at an angle with the first direction, and a limiting slide groove is arranged on the outer shell of the upper mold 200. The end of the elastic connecting shaft 22 is clamped in the limiting slide groove, so that the lift rod 1 can move obliquely along the limiting slide groove. The injection mold can reduce the wear of the lift rod 1 and the mold core surface 310 during the mold closing and opening process, and prevent the lift rod surface and the mold core surface 310 from being loosely sealed, thereby improving the yield of the molded product.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The mold tilting mechanism is characterized by: include: An inclined ejector rod (1), wherein the inclined ejector rod (1) is provided with an inclined top surface, and when the mold is closed, the elastic device (100) applies a first elastic force to the inclined ejector rod (1) in a first direction close to the lower mold (300); An auxiliary support assembly (2), wherein the auxiliary support assembly (2) is arranged on the inclined ejector rod (1), and the auxiliary support assembly (2) is provided with a support surface; along the first direction, the distance between the support surface and the lower mold (300) is smaller than the distance between the inclined top surface and the lower mold (300), and when the inclined top surface and the support surface are both in contact with the lower mold (300), the auxiliary support assembly (2) elastically deforms, and applies a second elastic force to the inclined ejector rod (1) along the first direction away from the lower mold (300).

2. The mold lift mechanism according to claim 1, characterized in that: The auxiliary support assembly (2) comprises a support rod (21) and an elastic connecting shaft (22), wherein the elastic connecting shaft (22) is arranged on the inclined push rod (1), the support rod (21) is arranged on the elastic connecting shaft (22), the support rod (21) has the support surface, and the elastic connecting shaft (22) can undergo elastic deformation to apply the second elastic force to the inclined push rod (1).

3. The mold lift mechanism according to claim 2, characterized in that: Two support rods (21) are provided, the elastic connection shaft (22) is passed through the inclined push rod (1), and the two support rods (21) are respectively provided at the two ends of the elastic connection shaft (22) passing through the inclined push rod (1).

4. The mold tilting mechanism according to claim 3, characterized in that: The auxiliary support assembly (2) further comprises a limit pin. A through hole (211) is provided on the support rod (21). The limit pin is arranged at the end of the elastic connection shaft (22) passing through the through hole (211).

5. The mold lift mechanism according to claim 4, characterized in that: The through hole (211) extends on the support rod (21) along a second direction, and the second direction is perpendicular to the first direction.

6. The mold lift mechanism according to claim 1, characterized in that: The surface of the lower mold (300) used for contacting with the inclined top surface is a mold core surface (310); The mold tilting mechanism also includes a cushion block (3), which is arranged on the lower mold (300), and has an abutting inclined surface (31), and the abutting inclined surface (31) extends smoothly from a first end to a second end; along the first direction, the first end is close to the tilted top surface relative to the mold core surface (310), and the second end is flush with the mold core surface (310).

7. The mold lift mechanism according to claim 6, characterized in that: The abutting inclined surface (31) is a plane.

8. The mold lift mechanism according to claim 6, characterized in that: The abutting inclined surface (31) is provided with a chip collecting hole (32) for accommodating chips.

9. The mold lift mechanism according to any one of claims 1 to 8, characterized in that: The inclined ejector rod (1) is provided with a chip collecting groove (11) for accommodating chips.

10. Injection mold, characterized in that It comprises an upper mold (200), an elastic device (100), a lower mold (300) and a mold lift mechanism according to any one of claims 1 to 9, wherein the lift rod (1) abuts against the upper mold (200) through the elastic device (100).

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