Mold tilting mechanism and injection mold

Abstract

The present invention belongs to the technical field of injection molds and discloses a mold lift mechanism and an injection mold. The mold lift mechanism includes a lift rod and an auxiliary support assembly. The lift rod is provided with a lift surface. When the mold is closed, an elastic device applies a first elastic force to the lift rod along a first direction close to the lower mold; the auxiliary support assembly is provided on the lift rod. The auxiliary support assembly is provided with a support surface. Along the first direction, the distance between the support surface and the lower mold is smaller than the distance between the lift surface and the lower mold. When both the lift surface and the support surface abut against the lower mold, the auxiliary support assembly elastically deforms and applies a second elastic force to the lift rod along the first direction away from the lower mold. The auxiliary support assembly of the mold lift mechanism can reduce the first elastic force of the elastic device on the lift rod, thereby reducing the pressure between the lower mold and the lift surface, thereby greatly reducing the wear of the lift surface and the lower mold, and effectively improving the quality of the molded product.

Description

Technical Field

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

[0002] The mold inclined ejector, also known as the inclined pin or 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 relatively simple 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 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] Mould inclined ejector mechanism, including:

[0007] An inclined ejector rod having an inclined top surface, wherein when the mold is closed, an elastic device applies a first elastic force to the inclined ejector rod in a first direction toward the lower mold;

[0008] An auxiliary support assembly is arranged on the inclined ejector rod, and the auxiliary support assembly is provided with a support surface; along the first direction, the distance between the support 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 support surface are both in contact with the lower mold, the auxiliary support assembly elastically deforms and applies 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 push rod, and the two support rods are respectively provided at both ends of the elastic connecting shaft passing through the inclined push rod.

[0011] Preferably, the auxiliary support assembly further includes a limit pin, a through hole is provided 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. The pad has an abutment slope, and the abutment slope extends smoothly 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, the inclined ejector rod is provided with a chip collecting groove for accommodating chips.

[0018] The injection mold comprises an upper mold, an elastic device, a lower mold and the above-mentioned mold inclined ejection mechanism, wherein the inclined ejection 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 having a slanted top 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 slanted top 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 slanted top surface does not abut against the lower mold; As the inclined ejector rod moves upward, the elastic device at the top of the inclined ejector rod is gradually compressed and the first elastic force acting on the inclined ejector rod gradually increases. 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 includes 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 the mold closing and mold opening process, and prevent the mold core surface and the inclined ejector surface from causing a loose seal due to wear, thereby ensuring the yield of the injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the injection mold provided by the specific embodiment of the present invention;

[0023] Figure 2 1. It is an assembly diagram of the inclined ejector rod, the auxiliary support assembly and the lower mold provided by a specific embodiment of the present invention;

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

[0025] In the picture:

[0026] 100- elastic device;

[0027] 200- upper mold;

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

[0029] 1- inclined ejector; 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 with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

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

[0035] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes 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 the 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 component 2 is provided on the inclined ejector rod 1, and the auxiliary support component 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 component 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 gradually increases. 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 it on 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. The top of the inclined ejector 1 abuts against the elastic device 100.

[0037] Furthermore, if Figure 2 As shown, auxiliary support assembly 2 includes a support rod 21 and an elastic connecting shaft 22. Elastic connecting shaft 22 is disposed on lift rod 1, and support rod 21 is disposed on elastic connecting shaft 22. Support rod 21 has a support surface, and elastic connecting shaft 22 is capable of elastic deformation to apply a second elastic force to lift rod 1. In this embodiment, elastic connecting shaft 22 is disposed on lift rod 1 and is made of an elastic material with a certain degree of toughness and elasticity. When elastic connecting shaft 22 is subjected to a force in a first direction, it is capable of elastic deformation to apply an elastic force to lift rod 1.

[0038] Specifically, if Figure 2As shown, two support rods 21 are provided, and an elastic connecting shaft 22 is provided through the lift rod 1. The two support rods 21 are respectively provided at both ends of the elastic connecting shaft 22 extending through the lift rod 1. In this embodiment, two support rods 21 are provided, and the two support rods 21 are provided on both sides of the lift rod 1 through the elastic connecting shaft 22. When the lower mold 300 presses upward against the auxiliary support assembly 2, the two support rods 21 ensure that the force on the lift rod 1 is uniform and stable.

[0039] Specifically, the auxiliary support assembly 2 also includes a stop pin. The support rod 21 is provided with a through-hole 211, and the stop pin is disposed at the end of the elastic connecting shaft 22 extending through the through-hole 211. In this embodiment, the stop pin is disposed at the end of the elastic connecting shaft 22 extending through the through-hole 211 to prevent the support rod 21 from being dislodged from the elastic connecting shaft 22. Specifically, the stop pin is detachably connected to the elastic connecting shaft 22, and the support rod 21 is also detachably connected to the elastic connecting shaft 22, thereby facilitating replacement and maintenance of the support rod 21. Specifically, the elastic connecting shaft 22 is inserted into the through-hole 211 in a manner that matches the through-hole 211, allowing the support rod 21 to always move synchronously with the elastic connecting shaft 22 in the first direction.

[0040] Specifically, if 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 of the lower mold 300 that contacts the inclined top surface is the mold core surface 310. When the inclined ejector pin 1 is pressed by the lower mold 300 in the first direction, it will move obliquely at a certain angle to the mold core surface 310 under the limitation of the upper mold 200. That is, the inclined ejector pin 1 does not move along the first direction. The movement of the inclined ejector pin 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 move in the same direction as the inclined ejector pin 1 under the drive of the inclined ejector pin 1. Therefore, 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 that is used to abut against the inclined top surface is the mold core surface 310; the mold inclined ejection mechanism also includes a pad 3, which is arranged on the lower mold 300 and has an abutting inclined surface 31. 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 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, and 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. The inclination direction of the abutting inclined surface 31 is the same as the direction of the partial movement of the inclined ejector 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. Then, as the inclined ejector 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 be in contact with the mold core surface 310.

[0042] Specifically, if 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 debris is provided on the abutting inclined surface 31, and a chip collecting groove 11 for accommodating debris is provided on the inclined ejector rod 1. In this embodiment, both the chip collecting hole 32 and the chip collecting groove 11 are used to accommodate debris that falls from the product during the mold closing process, thereby preventing the debris from affecting the product molding and 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 to the first direction, and a limiting slide groove is provided 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, 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 the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Mould inclined ejector mechanism, characterized in that: include: An inclined ejector rod (1), the inclined ejector rod (1) being provided with an inclined top surface, wherein when the mold is closed, the elastic device (100) applies a first elastic force to the inclined ejector rod (1) in a first direction toward 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 ejector rod and the lower mold (300); when the inclined ejector rod and the support surface are both in contact with the lower mold (300), the auxiliary support assembly (2) elastically deforms, applying a second elastic force to the inclined ejector rod (1) away from the lower mold (300) along the first direction.

2. The mold lift mechanism according to claim 1, characterized in that: The auxiliary support assembly (2) includes 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 connecting 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 connecting shaft (22) passing through the inclined push rod (1).

4. The mold lift 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 connecting 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 the inclined top surface is a mold core surface (310); The mold tilting mechanism further includes a pad (3), which is arranged on the lower mold (300), and has an abutting inclined surface (31), which smoothly extends from a first end to a second end; along the first direction, the first end is close to the tilting 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 The invention comprises an upper mold (200), an elastic device (100), a lower mold (300) and a mold tilting mechanism according to any one of claims 1 to 9, wherein the tilting rod (1) abuts against the upper mold (200) through the elastic device (100).

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