CN217169542U

CN217169542U - Molding die of molding type joint bearing

Info

Publication number: CN217169542U
Application number: CN202220886454.3U
Authority: CN
Inventors: 张小军; 何两加; 陈朱池
Original assignee: Fujian Longxi Bearing Group Co Ltd
Current assignee: Fujian Longxi Bearing Group Co Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-08-12
Anticipated expiration: 2032-04-15

Abstract

The utility model discloses a mould molding joint bearing's forming die, comprises an upper die, lower mould and dabber, be formed with the first concave part of inlaying in the lower mould, the dabber is connected in the first concave part of inlaying, and still be formed with the second in the lower mould and inlay the concave part, it inlays the concave part to be formed with the third in the last mould, be formed with the liner space of moulding plastics that the shaping liner was used between inner circle and outer lane, and can mould plastics the open form in space and lower port jam with the liner between inner circle and the outer lane through the last mould together of compound die and lower mould, be formed with a plurality of passageways of moulding plastics in last mould, the discharge gate of each passageway of moulding plastics all aims at the upper port department in liner space of moulding plastics and is linked together with liner space of moulding plastics. The utility model discloses need not to set up radial aperture rethread aperture to injection moulding as prior art generally circles on the outer lane, can guarantee the interior sphere integrality of outer lane, make its bearing capacity good to be favorable to improving joint bearing's life.

Description

Molding die of molding type joint bearing

Technical Field

The utility model relates to a bearing technical field, concretely relates to mould type joint bearing's forming die.

Background

Self-lubricating joint bearings are more selected for use in the joint bearing in the aviation field to meet the requirements of aviation products on long service life and high environmental adaptability, and meanwhile, the fine joint bearings are required to be used in many occasions such as low-power turboshaft engines for the purpose of weight reduction. A common process for lubricating a self-lubricating spherical plain bearing is to paste a fabric liner with PTFE (polytetrafluoroethylene) on the inner spherical surface of an outer ring of the spherical plain bearing or sinter a fluoroplastic metal sheet on the embedded surface of the outer ring of the spherical plain bearing, which is also called a metal liner, wherein the two liners are widely applied to an extrusion type spherical plain bearing, but the pasting or embedding of the liners has certain requirements on the size of the inner spherical surface of the spherical plain bearing, the spherical plain bearing with the inner spherical surface width smaller than 4mm cannot be pasted or embedded with the liners, and the inner spherical surface width of a plurality of microscopic spherical plain bearings is smaller than 4mm, so that the liner process has a short plate which cannot be applied to the microscopic spherical plain bearing. In the technical scheme, radial small holes are formed in an outer ring of the knuckle bearing, and a gasket structure is formed between an inner ring and an outer ring of the knuckle bearing through one-step injection molding by using an injection molding process, but the radial small holes are formed in the outer ring of the knuckle bearing, so that the load and the service life of the knuckle bearing are influenced to a certain extent, and negative effects are caused.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model provides a mould type joint bearing's forming die, it mainly solves to offer radial aperture and realize that the fashioned technology of liner can lead to joint bearing's load and life-span to receive the technical problem who influences now on joint bearing's outer lane.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

a forming die of a molding type joint bearing comprises an upper die, a lower die and a mandrel, wherein a first embedding concave part which can be used for embedding an outer ring of the joint bearing in a matching way is formed in the lower die, the mandrel is connected into the first embedding concave part so as to enable an inner ring of the joint bearing to be embedded in the first embedding concave part in a matching way and enable the inner ring and the outer ring to be coaxial, a second embedding concave part which can be used for embedding the lower end part of the inner ring sleeved on the mandrel is further formed in the lower die, a third embedding concave part which can be used for embedding the upper end part of the inner ring sleeved on the mandrel is formed in the upper die, a liner injection molding space for forming a liner is formed between the inner ring and the outer ring, the open upper port and the lower port of the liner injection molding space between the inner ring and the outer ring can be blocked through the upper die and the lower die which are closed together, so that the liner injection molding space forms a closed molding cavity structure, and a plurality of injection molding channels are formed in the upper die, the discharge port of each injection molding channel is aligned with the upper port of the liner injection molding space and communicated with the liner injection molding space.

Furthermore, the size of the inner diameter of the first embedding concave part is matched with the size of the outer diameter of the outer ring, and the depth of the first embedding concave part is matched with the thickness of the outer ring.

Further, the lower die comprises a bottom die plate and a middle die plate superposed on the bottom die plate, wherein the middle die plate is provided with an opening structure which is communicated up and down and forms a first embedding concave part which is used for embedding the outer ring of the joint bearing in a matching manner through superposition and matching with the bottom die plate, a second embedding concave part is formed on the bottom die plate, and the mandrel is connected to the center position of the first embedding concave part of the bottom die plate.

Furthermore, a groove is formed in the surface of the bottom template, one end of the groove is configured to be communicated with a lower port of the liner injection molding space, and the other end of the groove extends to the side edge of the bottom template and is communicated with the outside to form an exhaust channel.

Furthermore, at least two injection molding channels which are oppositely arranged left and right are arranged in the upper die.

Furthermore, the upper end of the mandrel extends upwards relative to the lower die, and a positioning hole corresponding to the mandrel is formed in the upper die.

The technical scheme has the following advantages or beneficial effects:

moulding type joint bearing's forming die and moulding type joint bearing in, outer lane and inner circle keep coaxial setting in arranging forming die's lower mould in back, and be formed with an annular liner space of moulding plastics between the sphere of outer lane and inner circle, after last mould and lower mould compound die, can seal the open form in liner space of moulding plastics and go up port and lower port through last mould and lower mould, make its mould cavity structure that forms closed form structure, then, the passageway of moulding plastics that just feeds through was aimed at with liner space of moulding plastics through last mould in discharge gate and liner space of moulding plastics comes to carry out injection moulding to joint bearing in order to form the liner between the sphere of outer lane and inner circle, its injection moulding process is simple convenient and fast. Through the forming die with the special structure, when the gasket is formed by injection molding, radial small holes do not need to be formed in the outer ring and then the gasket is subjected to radial injection molding processing through small holes as in the prior art, the integrity of the inner spherical surface of the outer ring can be ensured, the bearing performance of the inner spherical surface is good, and the service life of the joint bearing is prolonged.

Drawings

Fig. 1 is a schematic structural view of a forming die according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the embodiment of the present invention, in which the inner ring and the outer ring are placed in the forming mold.

Fig. 3 is a schematic structural diagram of the injection molding process of the forming mold according to the embodiment of the present invention.

Description of reference numerals:

1. the die comprises an upper die, a lower die, a mandrel, a core 4, an outer ring, a liner 5, an inner ring, a liner 6, a liner 7, a liner injection molding space, 11, a third embedding concave part, 12, an injection molding channel 21, a first embedding concave part, 22, a second embedding concave part, 23, a bottom die plate, 24, a middle die plate, 231 and a groove.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1 to 3, an embodiment of the present invention provides a mold for molding a spherical plain bearing, including an upper mold 1, a lower mold 2, and a mandrel 3, wherein a first embedding recess 21 into which an outer ring 4 of the spherical plain bearing is fittingly inserted is formed in the lower mold 2, the mandrel 3 is connected to the first embedding recess 21 so that an inner ring 5 of the spherical plain bearing is fittingly inserted and the inner ring 5 and the outer ring 4 are maintained coaxially, a second embedding recess 22 into which a lower end portion of the inner ring 5 fitted over the mandrel 3 is partially inserted is further formed in the lower mold 2, a third embedding recess 11 into which an upper end portion of the inner ring 5 fitted over the mandrel 3 is partially inserted is formed in the upper mold 1, a gasket injection space 7 for molding a gasket 6 is formed between the inner ring 5 and the outer ring 4, and an open upper port and a lower port of the gasket injection space 7 between the inner ring 5 and the outer ring 4 can be blocked by the upper mold 1 and the lower mold 2 being closed together, so that the liner injection space 7 forms a closed molding cavity structure, a plurality of injection channels 12 are formed in the upper die 1, and discharge ports of the injection channels 12 are aligned with upper ports of the liner injection space 7 and communicated with the liner injection space 7. It can be understood that, through the forming die with the special structure, when the liner 6 (the self-lubricating slip-form plastic liner) is formed by injection molding, radial small holes do not need to be formed on the outer ring and then the small holes are processed by radial injection molding, as in the prior art, the integrity of the inner spherical surface of the outer ring 4 can be ensured, the bearing performance is good, and the service life of the knuckle bearing is prolonged. In the embodiment, the outer ring 4 and the inner ring 5 are coaxially arranged in the lower die 2 of the forming die, an annular gasket injection molding space 7 is formed between the spherical surfaces of the outer ring 4 and the inner ring 5, after the upper die 1 and the lower die 2 are closed, the upper opening and the lower opening of the gasket injection molding space 7 can be sealed through the upper die 1 and the lower die 2, so that a molding cavity structure with a sealed structure is formed, then, the knuckle bearing is subjected to injection molding through the injection molding channel 12 which is aligned and communicated with the gasket injection molding space 7 through the discharge hole in the upper die 1, so that the gasket 6 is formed between the spherical surfaces of the outer ring 4 and the inner ring 5, the injection molding process is simple, convenient and rapid, and the bearing can be applied to the production of the fine knuckle bearing with a fine size.

Referring to fig. 1 to 3, in a preferred embodiment, the inner diameter of the first embedding recess 21 is matched with the outer diameter of the outer ring 4, and the depth of the first embedding recess 21 is matched with the thickness of the outer ring 4. In this embodiment, preferably, the lower mold 2 includes a bottom mold plate 23 and a middle mold plate 24 stacked on the bottom mold plate 23, the middle mold plate 24 is opened with an opening structure penetrating up and down and forms a first embedding recess 21 adapted to embed the outer ring 4 of the joint bearing by stacking and matching with the bottom mold plate 23, the second embedding recess 22 is formed on the bottom mold plate 23, and the mandrel 3 is connected to a central position of the first embedding recess 21 of the bottom mold plate 23. It can be understood that, in the present embodiment, by configuring the lower mold 2 to include the bottom mold plate 23 and the middle mold plate 24 stacked on the bottom mold plate 23, the knuckle bearing can be more conveniently demolded and taken out after the injection molding process is completed, so as to improve the production efficiency.

Referring to fig. 1 to 3, in a preferred embodiment, a groove 231 is formed on a surface of the bottom mold plate 23, one end of the groove 231 is configured to be communicated with a lower port of the gasket injection space 7, and the other end extends to a side of the bottom mold plate 23 to be communicated with the outside to form an exhaust channel.

Referring to fig. 1 to 3, in a preferred embodiment, at least two injection channels 12 are formed in the upper mold 1 and arranged oppositely left and right. However, it should be understood by those skilled in the art that in other embodiments, the injection channels 12 on the upper mold 1 are not limited to the specific embodiments disclosed in the present embodiment, and may be in other numbers, and those skilled in the art can specifically set the injection channels according to specific needs as long as the gasket injection space 7 can be uniformly injected.

Referring to fig. 1 to 3, in a preferred embodiment, an upper end of the mandrel 3 extends upward relative to the lower die 2, and a positioning hole corresponding to the mandrel 3 is formed in the upper die 1. It can be understood that, set up the locating hole that corresponds the setting with dabber 3 through last mould 1, make when last mould 1 and 2 compound dies of lower mould, can improve the compound die precision of last mould 1 and lower mould 2 better through locating hole and dabber 3's location cooperation, and then be favorable to improving joint bearing product injection moulding quality.

Referring to fig. 1 to fig. 3, the specific manufacturing method is as follows: firstly, an inner ring 5 of a joint bearing is sleeved on a mandrel 3 of a lower die 2 and pushed to the bottom to enable the lower end part of the inner ring 5 to be embedded into a second embedded concave part 22, meanwhile, an outer ring 4 is embedded into a first embedded concave part 21 of the lower die 2, then, an upper die 1 and the lower die 2 are matched, a discharge port of an injection channel 12 on the upper die 1 is aligned with and communicated with a gasket injection space 7, then, a dynamic polymer material is injected into the gasket injection space 7 through each injection channel 12 (the polymer material is in a liquid flowable state before solidification, and no component volatilizes in the solidification process so as to avoid defects such as bubbles in the solidification process), after drying and solidification, a gasket 6 is formed, and then, the joint bearing is flexibly processed to ensure that the inner ring 5 can flexibly rotate. In addition, the material of the gasket 6 is the prior art, and the corresponding polymer molding gasket material in the joint bearing in the prior art can be directly selected for use, and is not described again here.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and therefore, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present invention.

Claims

1. A molding die of a molding type joint bearing is characterized in that: the joint bearing comprises an upper die (1), a lower die (2) and a mandrel (3), wherein a first embedding concave part (21) which can be used for enabling an outer ring (4) of a joint bearing to be embedded in a matching mode is formed in the lower die (2), the mandrel (3) is connected into the first embedding concave part (21) to enable an inner ring (5) of the joint bearing to be embedded in a matching mode and enable the inner ring (5) and the outer ring (4) to keep coaxial, a second embedding concave part (22) which can be used for enabling the lower end part of the inner ring (5) sleeved on the mandrel (3) to be embedded in is further formed in the lower die (2), a third embedding concave part (11) which can be used for enabling the upper end part of the inner ring (5) sleeved on the mandrel (3) to be embedded in is formed in the upper die (1), a gasket injection molding space (7) for molding a gasket (6) is formed between the inner ring (5) and the outer ring (4), and an upper port and a lower port of the gasket injection space (7) between the inner ring (5) and the outer ring (4) can be opened through the upper die (1) and the lower die (2) which are closed together The port is blocked, so that the gasket injection molding space (7) forms a closed molding cavity structure, a plurality of injection molding channels (12) are formed in the upper die (1), the discharge port of each injection molding channel (12) is aligned to the upper port of the gasket injection molding space (7) and communicated with the gasket injection molding space (7), and the lower die (2) is also provided with an exhaust channel.

2. The molding die for a molded spherical plain bearing according to claim 1, wherein: the inner diameter size of the first embedding concave part (21) is matched with the outer diameter size of the outer ring (4), and the depth of the first embedding concave part (21) is matched with the thickness of the outer ring (4).

3. The molding die for a molded spherical plain bearing according to claim 2, wherein: the lower die (2) comprises a bottom die plate (23) and a middle die plate (24) superposed on the bottom die plate (23), wherein the middle die plate (24) is provided with an opening structure which is through up and down and forms a first embedding concave part (21) which is used for embedding an outer ring (4) of the joint bearing in a matching manner through superposition and matching with the bottom die plate (23), a second embedding concave part (22) is formed on the bottom die plate (23), and the mandrel (3) is connected to the center position of the first embedding concave part (21) of the bottom die plate (23).

4. The molding die for a molded spherical plain bearing according to claim 3, wherein: a groove (231) is formed in the surface of the bottom template (23), one end of the groove (231) is configured to be communicated with a lower port of the liner injection molding space (7), and the other end of the groove extends to the side edge of the bottom template (23) to be communicated with the outside to form an exhaust channel.

5. The molding die for a molded-type spherical plain bearing according to any one of claims 1 to 4, wherein: at least two injection molding channels (12) which are oppositely arranged left and right are arranged in the upper die (1).

6. The molding die for a molded-type spherical plain bearing according to any one of claims 1 to 4, wherein: the upper end of the mandrel (3) extends upwards relative to the lower die (2), and a positioning hole corresponding to the mandrel (3) is formed in the upper die (1).