CN113910646A - Demoulding device for contact lens - Google Patents
Demoulding device for contact lens Download PDFInfo
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- CN113910646A CN113910646A CN202111029607.9A CN202111029607A CN113910646A CN 113910646 A CN113910646 A CN 113910646A CN 202111029607 A CN202111029607 A CN 202111029607A CN 113910646 A CN113910646 A CN 113910646A
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- transmission mechanism
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- male die
- die body
- contact lens
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- 230000007246 mechanism Effects 0.000 claims abstract description 121
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 230000033001 locomotion Effects 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 9
- 238000000465 moulding Methods 0.000 description 8
- 238000003825 pressing Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 7
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- 210000000887 face Anatomy 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005571 horizontal transmission Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
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- 229920001875 Ebonite Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 210000004087 cornea Anatomy 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00038—Production of contact lenses
- B29D11/00125—Auxiliary operations, e.g. removing oxygen from the mould, conveying moulds from a storage to the production line in an inert atmosphere
- B29D11/00192—Demoulding, e.g. separating lenses from mould halves
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a contact lens demoulding device, comprising: the male die body is arranged on the bearing mechanism; the rotary transmission mechanism enters the inner cavity of the male die body from the opening direction of the male die body, and the axis of the male die body is the rotary central line of the rotary transmission mechanism; the rotary transmission mechanism moves in a continuous rotary mode, and a power output end of the rotary transmission mechanism abuts against the male die body. According to the technical scheme, the vibration force is uniformly diffused to the surface of the male die from the circle center area of the surface of the male die, and the demolding effect without damaging the contact lens is realized in the vibration process.
Description
Technical Field
The invention relates to the technical field of contact lens manufacturing, in particular to a contact lens demoulding device.
Background
Generally, contact lenses are different from frame lenses, can directly contact the cornea of eyes, correct vision according to the refraction of light, improve the flexibility of users, embody various colors and designs, and show eyes with various color shapes.
Such contact lenses are typically manufactured using a mold comprising a male mold and a female mold, the male mold body being a shell open at one end, the shell having a cylindrical body, the shell having a hemispherical surface area for molding the lens at one end of the cylindrical shell, the molding area having a center (i.e., the center of the circle) on the axis of the male mold. Specifically, after a transparent mixed liquid for manufacturing the contact lens is injected into a concave die made of PP materials, a convex die made of PP or PBT materials is inserted into the concave die, when the convex die and the concave die are combined, the mixed liquid overflows to the annular surface of the convex die according to a gap on the concave die to form the contact lens, the concave die and the convex die are separated after molding and curing, and the molded lens is attached to the surface of the convex die after separation. The lens formed under high heat and high pressure has the problems that the outer ring of the contact lens is easy to damage in the lens demoulding process, fragments generated by damage can be adsorbed on the surface of the lens (the surface of the lens has static electricity due to the lens material), and the like, and the problems are all causes of poor quality of the contact lens product.
In the prior art, an ultrasonic vibration rod is inserted into an inner cavity of a shell of a male mold, and a contact lens is gradually separated from the surface of the male mold by transmitting the force of the vibration rod to the surface of the mold. Specifically, the head of the ultrasonic vibration rod is completely inserted into the inner cavity of the male mold, and vibration is transmitted to the whole surface of the male mold, so that the surface of the contact lens is gradually separated from the surface of the male mold. However, in the vibration process of the ultrasonic vibration rod, the vibration frequency of the surface of the vibration rod is inconsistent, and the transmission direction of the force is changed, so that the surface of the convex mold is stressed unevenly within a preset time period, and therefore, the force transmitted to the surface of the lens is inconsistent with the stressed area of the lens, and the phenomenon that the local area of the surface of the lens is broken can occur.
Disclosure of Invention
The invention aims to provide a contact lens demoulding device, aiming at uniformly diffusing vibration force from a central point on the surface of a male mould to the surface of the male mould and realizing the separation demoulding effect without damaging the contact lens in the vibration process.
In order to achieve the above object, the present invention provides a contact lens demolding device, comprising:
the male die body is arranged on the bearing mechanism;
the rotary transmission mechanism enters the inner cavity of the male die body from the opening direction of the male die body, the axis of the male die body is the rotary central line of the rotary transmission mechanism, the power output end of the rotary transmission mechanism abuts against the male die body, and the rotary transmission mechanism moves in a continuous rotary mode to enable force to be transmitted to the surface of the male die body from the circle center area of the male die body in a diffusion mode.
Optionally, the male die body has an upper end surface and a lower end surface in the height direction, the opening is disposed on the lower end surface, and the rotary transmission mechanism enters the inner cavity of the male die body from below the male die body.
Optionally, a first through hole is formed in the surface of the supporting mechanism, the opening and the first through hole are coaxially arranged, and the rotary transmission mechanism penetrates through the first through hole and then enters the inner cavity of the convex mold body.
Optionally, the centre line of rotation of the rotation transmission mechanism is perpendicular to the horizontal ground.
Optionally, the male die body has an upper end surface and a lower end surface in the height direction, the opening is provided on the upper end surface, and the rotary transmission mechanism enters the inner cavity of the male die body from above the male die body.
Optionally, the device further comprises a vertical transmission mechanism, wherein the vertical transmission mechanism is arranged on the supporting mechanism and used for driving the rotary transmission mechanism to enter the inner cavity of the male die body from the direction of the upper end face or the lower end face.
Optionally, the rotary transmission mechanism comprises a first driving motor and a rotary rod, a shaft coupler is arranged on a motor shaft of the first driving motor, the rotary rod is cylindrical, a power input end of the rotary rod is connected with the shaft coupler, a power output end of the rotary rod abuts against the convex die body, a power output end of the rotary rod is provided with a chamfer structure, a motor base is arranged on the first driving motor, and the motor base is arranged on the vertical transmission mechanism.
Optionally, the vertical transmission mechanism comprises a screw rod transmission mechanism, and the motor base is arranged on a linear motion structure in the screw rod transmission mechanism.
Optionally, the swiveling lever is of a metal construction.
Optionally, the swiveling lever is of copper construction.
Has the advantages that: according to the technical scheme, the power output end of the rotary transmission mechanism abuts against the convex die body, specifically, the power output end of the rotary transmission mechanism enters the inner cavity of the convex die body and abuts against the circle center area of the convex die body, when the rotary transmission mechanism rotates, the power output end and the convex die body rub with each other, generated vibration force is uniformly diffused to the surface of the convex die from the circle center point of the surface of the convex die, and the separation and demolding effect without damaging the contact lens is achieved in the vibration process. Under the action of frictional heat, the surface of the male die made of the PP material expands and deforms due to heating, so that the contact lens on the surface can be jacked up to a certain extent, the demolding effect of the contact lens is further enhanced by matching with the vibration demolding effect, and the lens integrity is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of one embodiment of a contact lens demolding device of the present invention;
FIG. 2 is a schematic plan view of a position-limiting structure and a pushing structure of an embodiment of a contact lens demolding device of the invention;
FIG. 3 is a schematic plan view (left side view) of a vertical transmission mechanism in an embodiment of the contact lens demolding device of the invention;
FIG. 4 is a schematic cross-sectional view of a vertical transmission mechanism in an embodiment of the contact lens demolding device of the present invention;
FIG. 5 is a schematic plan view (front view) of a vertical transmission mechanism in an embodiment of the contact lens demolding device of the present invention;
FIG. 6 is a schematic view of a protrusion in an embodiment of a contact lens demolding device of the present invention;
FIG. 7 is a schematic cross-sectional view of a convex portion of another embodiment of the contact lens demolding device of the present invention;
the reference numbers illustrate:
| name (R) | Reference numerals | Name (R) | Reference |
| Bearing mechanism | |||
| 1 | |
331 | |
| First through |
11 | |
34 |
| |
12 | |
35 |
| |
121 | |
351 |
| |
13 | |
36 |
| |
14 | |
37 |
| |
2 | Connecting |
371 |
| |
21 | |
38 |
| |
22 | |
39 |
| |
221 | |
391 |
| Convex |
222 | |
4 |
| |
223 | |
5 |
| |
224 | |
51 |
| |
3 | |
52 |
| |
31 | Convex die |
100 |
| |
32 | Opening of the |
101 |
| |
33 | |
102 |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In an embodiment of the present invention, the contact lens demolding device comprises: the male die comprises a supporting mechanism 1, wherein a male die body 100 is arranged on the supporting mechanism 1; the rotary transmission mechanism 2 enters the inner cavity of the male die body 100 from the direction of the opening 101 of the male die body 100, the axis of the male die body 100 is the rotary central line of the rotary transmission mechanism 2, the power output end of the rotary transmission mechanism 2 abuts against the male die body 100, and the rotary transmission mechanism 2 moves in a continuous rotary mode, so that force is transmitted to the surface of the male die body 100 from the circle center area of the male die body 100 in a diffusion mode. As shown in fig. 1.
In the technical scheme of the invention, the power output end of the rotary transmission mechanism 2 abuts against the male die body 100, specifically, the power output end of the rotary transmission mechanism 2 enters the inner cavity of the male die body 100 and abuts against the circle center area of the male die body 100, when the rotary transmission mechanism 2 rotates, the power output end and the male die body 100 rub with each other, the generated vibration force is uniformly diffused to the surface of the male die from the circle center point of the surface of the male die, and the separation and demolding effect without damaging the contact lens is realized in the vibration process. Under the action of frictional heat, the surface of the male mold made of PP or PBT (both plastic materials) expands and deforms due to heating, so that the contact lens on the surface can be jacked up to a certain extent, the demolding effect of the contact lens is further enhanced by matching with the vibration demolding effect, and the lens is high in integrity. In practical applications, the rotary transmission mechanism 2 may include a motor and a rotary shaft and a rod that are driven by the motor (with a coupling), for example, the rotary shaft is a cylindrical structure, a power input end of the rotary shaft is coupled to the shaft coupling on the motor shaft, a power output end of the rotary shaft is inserted into the inner cavity of the male mold body 100 and correspondingly abuts against the position of the center of the male mold body 100, an axis of the male mold body 100 (the center of the shaft is on the axis) is a rotation center line of the rotary shaft (the axis of the rotary shaft), and the shaft body and other parts of the rotary shaft are not in contact with the male mold body 100, so as to ensure that the transmission power is transmitted only from the power output end. The power output end of the rotating shaft (rod) should have a chamfer structure, and the structure is designed for the purpose that the male die body 100 is in a hemispherical shell shape, the surface (hereinafter referred to as an inner surface) of an inner cavity of the male die body is a curved surface, so that the contact area between the power output end and the inner surface of the male die body 100 needs to be increased in order to increase the transmission stability of the rotating shaft (rod) during high-speed rotation, and therefore, the chamfer structure is arranged to enable the power output end to be attached to the inner surface of the male die body 100 as much as possible, and the contact area is increased. The chamfer structure is arranged, so that the abrasion degree of the power output end and the male die body 100 can be reduced, and the service life of the structure is prolonged. In practical applications, if the opening 101 of the cavity of the male die body 100 is directed upward (downward), the power output end of the rotary shaft (rod) can be inserted into the cavity vertically upward (downward). Further, in the technical scheme of the invention, the rotation center line of the rotation transmission mechanism 2 is vertical to the horizontal ground. The structure is arranged, for example, a rotating shaft is used, the rotating shaft is perpendicular to the horizontal ground and is not inclined to the horizontal ground, the structure is convenient to arrange, and the stable transmission is ensured. The supporting mechanism 1 may be a supporting platform with a supporting foot (not shown) at the bottom, and the first through hole 11 is opened on the surface of the supporting platform (as shown in fig. 3).
On the other hand, if the opening 101 of the inner cavity of the male mold body 100 faces left (faces right), the power output end of the rotating shaft (rod) can be horizontally inserted into the inner cavity right (faces left), but with this type of structure, the lens falls down after being demolded, which is very likely to cause damage to the surface of the lens. In order to avoid the above technical problem, in a preferred embodiment, the male mold body 100 has an upper end surface and a lower end surface in a height direction, the opening 101 is disposed on the lower end surface (as shown in fig. 1, 6 and 7), the rotary transmission mechanism 2 enters the inner cavity of the male mold body 100 from below the male mold body 100, and then a lens is molded on the upper end surface of the male mold body 100, and the rotary transmission mechanism 2 enters the inner cavity of the male mold body 100 from below the male mold body 100. Similarly, in the technical solution of the present invention, the male die body 100 has an upper end surface and a lower end surface in the height direction, the opening 101 is disposed on the upper end surface (not shown in the figure), and the rotary transmission mechanism 2 enters the inner cavity of the male die body 100 from above the male die body 100. At this time, the lens is molded on the lower end surface of the male mold body 100, and the rotary transmission mechanism 2 enters the inner cavity of the male mold body 100 from above the male mold body 100, and of course, the lens still falls off from the mold body due to the structural arrangement, but the technical scheme itself is also the protection scope of the present application.
When the opening 101 is arranged on the lower end face, the rotary transmission mechanism 2 enters the inner cavity of the male die body 100 from the lower part of the male die body 100, in order to increase the structural compactness, in the technical scheme of the invention, a first through hole 11 is arranged on the surface of the supporting mechanism 1, the opening 101 and the first through hole 11 are coaxially arranged, and the rotary transmission mechanism 2 enters the inner cavity of the male die body 100 after passing through the first through hole 11. As shown in fig. 1 and 7.
In a further embodiment, in order to increase the degree of automation of the demolding device, the demolding device further comprises a vertical transmission mechanism 3, the vertical transmission mechanism 3 is arranged on the supporting mechanism 1, and the vertical transmission mechanism 3 is used for driving the rotary transmission mechanism 2 to enter the inner cavity of the male mold body 100 from the direction of the upper end face or the lower end face. In the technical scheme of the invention, the rotary transmission mechanism 2 can comprise a first driving motor 21 and a rotary rod 22, a shaft coupling (not marked in the figure) is arranged on a motor shaft of the first driving motor 21, the rotary rod 22 is cylindrical, a power input end of the rotary rod 22 is connected with the shaft coupling, a power output end of the rotary rod 22 abuts against the male die body 100, a power output end of the rotary rod 22 is provided with a chamfering structure 221, a motor base (not marked in the figure) is arranged on the first driving motor 21, and the motor base is arranged on the vertical transmission mechanism 3. In a further embodiment, in the technical solution of the present invention, the vertical transmission mechanism 3 includes a screw rod transmission mechanism (not shown), and the motor base is disposed on a linear motion structure in the screw rod transmission mechanism (the structure and the disposition relationship are prior art and are not described herein again). Of course, the vertical transmission 3 includes, but is not limited to, the above-described transmission types.
The structure is arranged, the power input end of the rotary rod 22 is connected with a coupling on a motor shaft, the power output end of the rotary rod 22 is inserted into the inner cavity of the male die body 100 and correspondingly abuts against the position of the circle center of the male die body 100, the axis of the male die body 100 (the circle center is on the axis) is the rotary central line of the rotary rod 22 (the axis of the rotary rod 22), and the rod body and other parts of the rotary rod 22 are not in contact with the male die body 100, so that the transmission power is only transmitted from the power output end. The power output end of the rotary rod 22 should have a chamfer structure 221, which is designed to increase the contact area between the power output end and the inner surface of the male die body 100 in order to increase the transmission stability of the rotary rod 22 rotating at high speed because the male die body 100 is in the shape of a hemispherical shell and the surface (hereinafter referred to as inner surface) of the inner cavity thereof is a curved surface, so that the chamfer structure 221 is provided to make the power output end attach to the inner surface of the male die body 100 as much as possible, thereby increasing the contact area. The chamfer structure 221 is arranged, so that the abrasion degree of the power output end and the male die body 100 can be reduced, and the service life of the structure is prolonged.
In the technical solution of the present invention, the rotary rod 22 is a metal structure.
This type of structural arrangement is beneficial to increasing the service life of the turn lever 22. Of course, the metal structure is easy to generate heat when rotating at high speed and being rubbed, which is beneficial to transferring heat to the drawing die body made of plastic material. On the other hand, the rust-proof function of the rotary rod 22 needs to be added to ensure that the surface is smooth and the transmission stability is not affected, so that in practical application, the structure of the rotary rod 22 made of copper, aluminum or iron can be selected. However, aluminum has a relatively soft texture, is easily abraded, has a short service life, and iron is easily rusted compared with other two materials. Therefore, in the present invention, the rotary rod 22 is made of copper, because the copper has stable properties, is wear-resistant, high temperature-resistant, not easy to deform, stable in quality, not easy to generate chemical reaction (rust due to moisture), and has good thermal conductivity, so that the rotary rod 22 is used as a material for manufacturing the rotary rod.
In the technical scheme of the invention, a male die body 100 (hereinafter referred to as a die) is arranged on the supporting mechanism 1, the die and the supporting mechanism 1 can be welded and fixed or integrally formed, or a flange structure 102 (step structure) is arranged at the edge of the die, and the flange structure 102 is clamped at the edge of the first through hole 11, the structure is designed to enable the die to be detachable, but at the same time, the stability of the die on the supporting mechanism 1 is greatly weakened, and at the moment, in order to further fix the die, the technical scheme of the invention further comprises a limiting structure 4, wherein the limiting structure 4 is distributed on the supporting mechanism 1 along the radial direction of the male die body 100 and is matched and leaned against the outer wall of the male die body 100 to be used for positioning the male die body 100 on the supporting mechanism 1. As shown in fig. 1 and 2.
In practical applications, the supporting mechanism 1 includes a supporting platform, the male mold body 100 and the limiting structures 4 are both disposed on the supporting platform, and the opening 101 of the male mold body 100 faces downward (or upward), so that the limiting structures 4 are distributed on the supporting platform along the radial direction of the male mold body 100 and are in mutual fit and abutment with the outer wall of the male mold body 100, for positioning the male mold body 100 on the supporting mechanism 1, specifically, as described in the background, "the male mold body is a shell with one end open 101, and the surface area for molding a lens on the shell is hemispherical", so that the limiting structures 4 only need to abut against the outer wall of the shell from the side direction of the shell, thereby reducing the vibration amplitude of the shell, increasing the stability of the structural connection, but cannot block the surface area for molding a lens on the shell, for example, when the opening 101 of the male mold body 100 faces downward, the surface area of the lens for molding is convexly arranged on the upper surface of the supporting platform, and the limiting structure 4 only limits the part of the male mold body 100 below the surface area.
In the technical scheme of the invention, the limiting structure 4 is arranged on the supporting mechanism 1 through a detachable structure (not shown in the figure). Further, in the technical solution of the present invention, screw holes (not shown in the drawings) are disposed on the supporting mechanism 1 and the limiting structure 4, the detachable structure includes a screw, and the limiting structure 4 is connected to the supporting mechanism 1 through the screw.
This type of structure setting sets up terrace die utensil body 100 on bearing mechanism 1 earlier, again according to actual demand installation limit structure 4, can set up limit structure 4's mounted position at will, increases and uses the flexibility. The screw holes on the supporting mechanism 1 (supporting platform) should be set in quantity and position according to actual use requirements.
In order to be matched and tightly leaned with the cylindrical male die body 100, in the technical scheme of the invention, the cross section of the limiting structure 4 is in a semicircular ring shape. Of course, the surface of the limiting structure 4, which is attached to the male die body 100, is an arc surface, and the above technical effects can also be achieved.
In the technical scheme of the invention, the limiting structure 4 is a plastic block. The structure has low cost and can be widely used.
In the technical scheme of the invention, the device further comprises a pushing structure 5, wherein the pushing structure 5 is arranged on the supporting mechanism 1 along the radial direction of the male die body 100, and the pushing structure 5 is opposite to the limiting structure 4 and provides pressure on the male die body 100 in the horizontal direction.
The pushing structure 5 can provide a horizontal pressure (the pressure points to the center of the male mold body 100) from the radial direction of the male mold body 100, and meanwhile, the limiting structure 4 also applies a horizontal force to the male mold body 100, the two forces are opposite and both face the center of the male mold body 100, so that the stability of the male mold body 100 can be actively increased. The pushing structure 5 applies force in the horizontal direction to the male die body 100 in the movement process, the reset function can be realized, and the limiting structure 4 realizes the limiting function after being fixed.
In the technical solution of the present invention, the pushing structure 5 includes a first pushing structure (not shown) and a second pushing structure (not shown), and the first pushing structure and the second pushing structure are disposed opposite to each other.
The structure arrangement is that the first pushing structure and the second pushing structure can respectively provide pressure in the horizontal direction to the male die body 100 from the directions of the two sides of the male die body 100. It is worth supplementing that if the first pushing structure and the second pushing structure are provided, the limiting structure 4 on the supporting mechanism 1 can be omitted.
In the technical scheme of the invention, the pushing structure 5 comprises a horizontal transmission structure 51 and a pressing block 52, the pressing block 52 is connected to the horizontal transmission structure 51, and the cross section of the pressing block 52 is in a semicircular ring shape and is used for being matched and abutted with the outer wall of the male die body 100. Of course, the surface of the pressing block 52, which is attached to the male die body 100, is a cambered surface, and the above technical effects can also be achieved.
In the technical solution of the present invention, the horizontal transmission structure 51 is a cylinder, and the pressing block 52 is connected to a piston shaft (not shown) of the cylinder.
In the technical scheme of the invention, the pressing block 52 is a hard rubber block.
When the first pushing structure 5 and the second pushing structure 5 are used for providing pressure in the horizontal direction to the male die body 100 from the directions of the two sides of the male die body 100, in order to reduce or prevent the slipping phenomenon, the pressing block 52 is made of hard rubber, and can be attached to the outer wall of the male die body 100 made of plastic after being slightly deformed.
In other preferred embodiments, the vertical transmission mechanism 3 includes a base 31, a second driving motor 32, a belt transmission structure, a sleeve 33, a bearing structure 34, a lifting rod 35 and a guide rod 37, wherein a second through hole (not shown) and a third through hole (not shown) are formed on a surface of the supporting mechanism 1, the base 31 is disposed on the supporting mechanism 1, the second driving motor 32 is disposed on the base 31, the bearing structure 34 is disposed in the second through hole, an outer wall of the sleeve 33 is tightly coupled to the bearing structure 34, an inner wall of the sleeve 33 is provided with an inner thread structure 331, the lifting rod 35 passes through the sleeve 33, an outer wall of the lifting rod 35 is provided with an outer thread structure 351, the outer thread structure 351 is coupled to the inner thread structure 331, the lifting rod 35 is perpendicular to a horizontal ground, and a motor shaft of the second driving motor 32 is coupled to an outer wall of the sleeve 33 through the belt transmission structure The lifting rod 35 is provided with a bottom plate 36, the bottom plate 36 faces the male die body 100, the rotary transmission mechanism 2 is arranged on the bottom plate 36, the guide rod 37 penetrates through the third through hole, the guide rod 37 is parallel to the lifting rod 35, a connecting part 371 is arranged at the top end of the lifting rod 35, the connecting part 371 faces the lifting rod 35, and the top end of the lifting rod 35 is connected with the connecting part 371. Of course, if the opening 101 of the male die body 100 is oriented to the left and right, the vertical transmission mechanism 3 is not suitable for such a case. As shown in fig. 3-5.
In the technical scheme of the invention, as mentioned above, in order to realize the degree of automation of the demolding device, the rotary transmission mechanism 2 automatically moves towards the direction of the male mold body 100 through a mechanical device, so that the vertical transmission mechanism 3 is arranged. In practical application, the mold for manufacturing the contact lens is small in volume, the mass and the volume of the rotary transmission mechanism 2 are small, for example, the rotary shaft (the rotary rod 22) is small in diameter (2-3cm) and volume, if the rotary transmission mechanism 2 is driven by pneumatic and hydraulic pressure to move, phenomena of unstable air pressure and hydraulic pressure are easy to occur after long-term use, which causes unstable transmission, for example, an air cylinder is easy to leak after long-term use, the force is uncontrollable in the using process, the feeding distance of the rotary transmission mechanism 2 cannot be controlled, and the cost is high if a transmission mechanism controlled by a program is provided, therefore, the invention provides the vertical transmission mechanism 3 which is high in economical efficiency and suitable for the rotary transmission mechanism 2 with small mass and volume, wherein the lifting rod 35 is in threaded connection with the inner wall of the sleeve 33, the motor shaft of the second driving motor 32 rotates, the sleeve 33 (the bearing structure 34 supports the sleeve 33 to rotate horizontally) is driven by the belt transmission structure to rotate horizontally, due to the fixed position of the sleeve 33, the lifting rod 35 moves in the vertical direction under the effect of the screw connection. Specifically, if the motor shaft rotates forward, the lifting rod 35 can be raised, and if the motor shaft rotates backward, the lifting rod 35 is lowered, but of course, if the lifting rod 35 rotates along with the sleeve 33, the lifting effect cannot be achieved, and in order to prevent this, the guide rod 37 is connected to the lifting rod 35, so that the lifting rod 35 can be prevented from rotating (only moving up and down due to the fact that the guide rod 37 is limited by the through hole structure) and can also be lifted along with the lifting rod 35. In practical application, if the opening 101 of the male mold body 100 faces downward, the lifting rod 35 can be controlled to ascend to drive the rotary transmission mechanism 2 to enter the inner cavity of the male mold body 100 from the lower side of the male mold body 100, and further, as described above, the rotary transmission mechanism 2 passes through the first through hole 11 and then enters the inner cavity of the male mold body 100; if the opening 101 of the male die body 100 faces upward, the lifting rod 35 can be controlled to descend, so as to drive the rotary transmission mechanism 2 to enter the inner cavity of the male die body 100 from the upper part of the male die body 100. The technical scheme of the invention adopts pure mechanical control, has stable transmission and low manufacturing cost, and has higher practicability and good economy. In practical applications, if the rotation transmission mechanism 2 includes a driving motor, a motor base for mounting the driving motor is disposed on the bottom plate 36.
In the technical scheme of the invention, the belt transmission structure comprises a driving wheel 38, a driven wheel 39 and a belt 391, the driving wheel 38 is connected to a motor shaft of the second driving motor 32, the driven wheel 39 is sleeved on the outer wall of the sleeve 33, and the belt 391 is connected with the driving wheel 38 and the driven wheel 39 and then is in a closed ring shape.
In the technical scheme of the invention, a support 12 is arranged on the supporting mechanism 1, and a sensing probe 121 is arranged on the support 12.
In the structure arrangement, if the motor shaft rotates forward (reversely), the lifting rod 35 rises (descends), and when the lifting rod 35 rises (descends) to the preset level, the sensing probe 121 senses the lifting rod 35, and then the second driving motor 32 is controlled to stop working, which indicates that the rotary transmission mechanism 2 enters the inner cavity of the male die body 100 according to the established program and path. Of course, this type of program control needs to be controlled by a control component such as a PLC controller or a single chip microcomputer, and this control component is prior art, is not the scope of protection of this application, and is not repeated here.
In the technical solution of the present invention, the sensing probe 121 is an infrared sensor. Of course, optical sensors, ultrasonic sensors, etc. may also be used.
In the technical solution of the present invention, the bottom plate 36 is connected to the guide rod 37.
This kind of structural arrangement, owing to be provided with gyration drive mechanism 2 on the bottom plate 36, fix bottom plate 36 on the guide bar 37 that is close to lifter 35, can further increase transmission stability. Of course, the bottom plate 36 may be connected to the guide rod 37, and the lifting rod 35 is only responsible for transmission, so that the transmission efficiency of the second driving motor 32 can be increased.
In the technical scheme of the invention, a guide shaft 13 is arranged on the supporting mechanism 1, a shaft sleeve (not shown) is arranged on the bottom plate 36, and the guide shaft 13 is inserted in the shaft sleeve.
The structure is arranged, when the bottom plate 36 moves up and down, the guide shaft 13 also moves up and down in the shaft sleeve, so that the guide effect is achieved, and the movement stability of the bottom plate 36 is improved. As shown in fig. 1, when the bottom plate 36 is located below the supporting mechanism 1, the guide shaft 13 is provided at the bottom of the supporting mechanism 1.
In order to improve the structural connection stability, the transmission stability and the structural service life, in the technical scheme of the invention, the sleeve 33 and the lifting rod 35 are both of metal structures. Further, in the technical solution of the present invention, the sleeve 33 and the lifting rod 35 are both copper structures.
In order to increase controllability, in the technical solution of the present invention, the second driving motor 32 is a servo motor.
In the technical scheme of the invention, a housing 14 is arranged on the supporting mechanism 1, a fourth through hole (not shown) and a fifth through hole (not shown) which are communicated with an inner cavity of the housing 14 are formed in the surface of the housing 14, the sleeve 33, the belt transmission structure and the bearing structure 34 are all arranged in the inner cavity of the housing 14, the lifting rod 35 penetrates through the fourth through hole, the second driving motor 32 and the base 31 are all arranged on the housing 14, and a motor shaft of the second driving motor 32 vertically penetrates through the fifth through hole downwards and then is connected with the belt transmission structure.
In other preferred embodiments, the rotation transmission mechanism 2 may include a first driving motor 21 and a rotation rod 22, a shaft coupling is disposed on a motor shaft of the first driving motor 21, the rotation rod 22 is cylindrical, a power input end of the rotation rod 22 is connected to the shaft coupling, a power output end of the rotation rod 22 abuts against the male mold body 100, and a protrusion 222 is disposed on the power output end of the rotation rod 22. As shown in fig. 1, as shown in fig. 6 and 7.
As described above, the power take-off end is provided with the chamfered structure 221 in order to increase the contact area with the male die body 100, but the wear of the power take-off end is also increased by increasing the contact area at a glance, and the convex portion 222 is provided in order to solve the above-described technical problem in order to change the surface contact into point contact. Compared with a surface contact mode, the point contact mode enables force to be concentrated on the circle center of the forming surface of the male die body 100, transmission stability is further improved, the vibration degree of the surface of the male die body is small, and product quality is guaranteed.
In the present invention, the convex portion 222 is a hemisphere.
This type of structure setting, because the surface area who is used for the shaping lens on the convex mould main part is the hemisphere, and its inner surface is the curved surface, and in order to laminate the adaptation more with this shape inner surface, convex part 222 is hemispherical, of course, also can be spherical.
In the technical solution of the present invention, an elastic structure 223 is disposed on the power output end, and the convex portion 222 is connected to the elastic structure 223.
Since the surface area of the male mold body for molding the lens is hemispherical and the inner surface thereof is a curved surface, of course, the shape of the inner cavity of the male mold body 100 is not uniform under the influence of the mold, so that the convex portion 222 of a single structure cannot be effectively abutted against the inner surface thereof, and the slip phenomenon is easily caused, and in order to be adapted to the inner surfaces of different structures, the elastic structure 223 is provided, and if the convex portion 222 is pressed against the inner surface of the male mold body 100, the convex portion 222 is flexibly contacted with the inner surface of the male mold body 100 under the action of the elastic structure 223, so that the adaptability of the structure of the convex portion 222 is increased, and the slip phenomenon of the convex portion 222 is reduced or prevented.
In the technical solution of the present invention, a groove 224 is disposed on the power output end of the rotary rod 22, the elastic structure 223 is disposed in the groove 224, and the protrusion 222 is disposed outside the groove 224 in a protruding manner.
In the technical solution of the present invention, the elastic structure 223 is a spring structure.
In the technical solution of the present invention, there are a plurality of the convex portions 222, and the plurality of convex portions 222 are uniformly distributed on the power output end of the rotary rod 22 along the circumferential direction. The transmission effectiveness can be further increased. Meanwhile, a plurality of grooves 224 and elastic structures 223 may be provided, and the grooves 224, the elastic structures 223 and the protrusions 222 are correspondingly arranged and connected one by one.
In the technical solution of the present invention, the convex portion 222 is a metal structure. Further, in the present invention, the protruding portion 222 is a copper structure
The structure is stable in property, wear-resistant, high-temperature-resistant, not easy to deform and stable in quality, does not easily generate chemical reaction (rust due to moisture), and has good thermal conductivity, so that the copper is used as a manufacturing material of the convex part 222.
In order to facilitate the processing, in the technical solution of the present invention, the protrusion 222 is integrally formed with the rotating rod 22.
In the technical scheme of the present invention, a power output end of the rotary rod 22 is provided with a chamfer structure 221, and the groove 224 is formed on the surface of the chamfer structure 221.
This type of structure is arranged so that the convex portion 222 of the groove 224 faces the outer wall direction of the vertical turn lever 22, and is suitable for the structure of the male mold body 100 having a large molding area.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A contact lens demolding device, comprising:
the male die body is arranged on the bearing mechanism; and
the rotary transmission mechanism enters the inner cavity of the male die body from the opening direction of the male die body, the axis of the male die body is the rotary central line of the rotary transmission mechanism, the power output end of the rotary transmission mechanism abuts against the male die body, and the rotary transmission mechanism moves in a continuous rotary mode to enable force to be transmitted to the surface of the male die body from the circle center area of the male die body in a diffusion mode.
2. The contact lens demolding device as claimed in claim 1, wherein the male mold body has an upper end surface and a lower end surface in a height direction, the opening is provided in the lower end surface, and the rotary transmission mechanism enters the inner cavity of the male mold body from below the male mold body.
3. The contact lens demolding device as claimed in claim 2, wherein a first through hole is formed in the surface of the supporting mechanism, the opening and the first through hole are coaxially arranged, and the rotary transmission mechanism penetrates through the first through hole and then enters the inner cavity of the convex mold body.
4. The contact lens demolding device as claimed in claim 3, wherein the center line of rotation of the rotary transmission mechanism is perpendicular to the horizontal ground.
5. The contact lens demolding device as claimed in claim 1, wherein the male mold body has an upper end surface and a lower end surface in a height direction, the opening is provided in the upper end surface, and the rotary transmission mechanism enters the inner cavity of the male mold body from above the male mold body.
6. The contact lens demolding device as claimed in any one of claims 2 to 5, further comprising a vertical transmission mechanism, wherein the vertical transmission mechanism is disposed on the supporting mechanism, and the vertical transmission mechanism is configured to drive the rotary transmission mechanism to enter the inner cavity of the male mold body from the direction of the upper end face or the lower end face.
7. The contact lens demolding device as claimed in claim 6, wherein the rotary transmission mechanism comprises a first driving motor and a rotary rod, a shaft coupler is arranged on a motor shaft of the first driving motor, the rotary rod is cylindrical, a power input end of the rotary rod is connected with the shaft coupler, a power output end of the rotary rod abuts against the convex mold body, a chamfering structure is arranged on a power output end of the rotary rod, a motor base is arranged on the first driving motor, and the motor base is arranged on the vertical transmission mechanism.
8. The contact lens demolding device as claimed in claim 7, wherein the vertical transmission mechanism comprises a screw transmission mechanism, and the motor base is provided on a linear motion structure in the screw transmission mechanism.
9. The contact lens demolding device as claimed in claim 7, wherein said rotary rod is of a metal structure.
10. The contact lens demolding device as claimed in claim 9, wherein said rotary rod is of a copper structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111029607.9A CN113910646A (en) | 2021-09-02 | 2021-09-02 | Demoulding device for contact lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111029607.9A CN113910646A (en) | 2021-09-02 | 2021-09-02 | Demoulding device for contact lens |
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| Publication Number | Publication Date |
|---|---|
| CN113910646A true CN113910646A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111029607.9A Pending CN113910646A (en) | 2021-09-02 | 2021-09-02 | Demoulding device for contact lens |
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| CN (1) | CN113910646A (en) |
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| CN216442888U (en) * | 2021-09-02 | 2022-05-06 | 深圳市大仕城光学科技有限公司 | Demoulding device for contact lens |
| CN216465627U (en) * | 2021-09-02 | 2022-05-10 | 深圳市大仕城光学科技有限公司 | Demoulding device for contact lens |
| CN216635026U (en) * | 2021-09-02 | 2022-05-31 | 深圳市大仕城光学科技有限公司 | Demoulding device for contact lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0686485A2 (en) * | 1994-06-10 | 1995-12-13 | JOHNSON & JOHNSON VISION PRODUCTS, INC. | Laser demolding apparatus and method |
| CN1314841A (en) * | 1998-08-27 | 2001-09-26 | 博士伦有限公司 | Automated cast mold hydrating device |
| CN109014146A (en) * | 2018-07-29 | 2018-12-18 | 任大龙 | A kind of easily demoulding machine components mold |
| KR102090335B1 (en) * | 2019-10-02 | 2020-03-17 | 가정만 | A contact-lens separate device |
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