CN114701122A - Molding die of molding type joint bearing - Google Patents
Molding die of molding type joint bearing Download PDFInfo
- Publication number
- CN114701122A CN114701122A CN202210392358.8A CN202210392358A CN114701122A CN 114701122 A CN114701122 A CN 114701122A CN 202210392358 A CN202210392358 A CN 202210392358A CN 114701122 A CN114701122 A CN 114701122A
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- die
- injection molding
- concave part
- outer ring
- molding
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- 238000000465 moulding Methods 0.000 title claims abstract description 29
- 238000001746 injection moulding Methods 0.000 claims abstract description 46
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a forming die of a molding type joint bearing, which comprises an upper die, a lower die and a mandrel, wherein a first embedding concave part is formed in the lower die, the mandrel is connected in the first embedding concave part, a second embedding concave part is also formed in the lower die, a third embedding concave part is formed in the upper die, a liner injection molding space for forming a liner is formed between an inner ring and an 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, a plurality of injection molding channels are formed in the upper die, and discharge ports of the injection molding channels are aligned to the upper port of the liner injection molding space and are communicated with the liner injection molding space. According to the invention, radial small holes do not need to be formed on the outer ring and then subjected to radial injection molding processing of the small holes as in the prior art, so that the integrity of the inner spherical surface of the outer ring can be ensured, the bearing performance is good, and the service life of the joint bearing is favorably prolonged.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a forming die of a molding type oscillating bearing.
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.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a molding die of a molding type joint bearing, which mainly solves the technical problem that the load and the service life of the joint bearing are influenced by the existing process of forming a liner by forming a radial small hole on an outer ring of the joint bearing.
In order to achieve the purpose, the invention is realized by the following technical scheme:
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:
in the forming die of the molding type joint bearing and the molding type joint bearing, the outer ring and the inner ring are coaxially arranged after being arranged in the lower die of the forming die, an annular gasket injection molding space is formed between the spherical surfaces of the outer ring and the inner ring, when the upper die and the lower die are closed, the open upper port and the lower port of the gasket injection molding space can be closed through the upper die and the lower die to form a molding cavity structure with a closed structure, and then the joint bearing is subjected to injection molding through the injection molding channel which is aligned and communicated with the gasket injection molding space and is formed between the spherical surfaces of the outer ring and the inner ring through the discharge port in the upper die. 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 molding die according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of the inner ring and the outer ring of the embodiment of the invention being placed in a forming mold.
Fig. 3 is a schematic structural diagram of the injection molding process of the molding die according to the embodiment of the 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 invention is further described below with reference to the 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, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to 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, the lower mold 2 having a first embedding recess 21 formed therein into which an outer race 4 of the spherical plain bearing is fittingly inserted, the mandrel 3 being connected to the first embedding recess 21 so that an inner race 5 of the spherical plain bearing is fittingly inserted and the inner race 5 and the outer race 4 are maintained coaxially, the lower mold 2 further having a second embedding recess 22 formed therein into which a lower end portion of the inner race 5 fitted over the mandrel 3 is inserted, the upper mold 1 having a third embedding recess 11 formed therein into which an upper end portion of the inner race 5 fitted over the mandrel 3 is inserted, a gasket injection space 7 for molding a gasket 6 being formed between the inner race 5 and the outer race 4, and an open upper port and a lower port of the gasket injection space 7 between the inner race 5 and the outer race 4 being capable of being blocked by the upper mold 1 and the lower mold 2 being clamped 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 above special structure, when the liner 6 is formed by injection molding (self-lubricating slip-form plastic liner), the inner spherical surface integrity of the outer ring 4 can be ensured without forming radial small holes on the outer ring and then performing radial injection molding processing on the small holes as in the prior art, so that the bearing performance of the inner spherical surface is good, and the service life of the joint 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 pad 6 is the prior art, and the corresponding polymer molding pad material in the joint bearing in the prior art can be directly selected for use, and is not described herein again.
The above-mentioned embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and these modifications or substitutions do not make the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention, so that all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
Claims (6)
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-type spherical plain bearing according to claim 1, characterized in that: 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210392358.8A CN114701122B (en) | 2022-04-15 | 2022-04-15 | Forming die of molded joint bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210392358.8A CN114701122B (en) | 2022-04-15 | 2022-04-15 | Forming die of molded joint bearing |
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| Publication Number | Publication Date |
|---|---|
| CN114701122A true CN114701122A (en) | 2022-07-05 |
| CN114701122B CN114701122B (en) | 2024-10-15 |
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| CN202210392358.8A Active CN114701122B (en) | 2022-04-15 | 2022-04-15 | Forming die of molded joint bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116175874A (en) * | 2023-02-15 | 2023-05-30 | 福建龙溪轴承(集团)股份有限公司 | Self-lubricating radial spherical plain bearing injection mold and molding method |
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