CN112976456B - Mold for processing contact lens and molding mechanism of mold - Google Patents
Mold for processing contact lens and molding mechanism of mold Download PDFInfo
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- CN112976456B CN112976456B CN202110171070.3A CN202110171070A CN112976456B CN 112976456 B CN112976456 B CN 112976456B CN 202110171070 A CN202110171070 A CN 202110171070A CN 112976456 B CN112976456 B CN 112976456B
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
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- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
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- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/305—Mounting of moulds or mould support plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
- B29L2011/0041—Contact lenses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a mould for processing a contact lens and a forming mechanism of the mould, wherein the mould comprises a lens male mould and a lens female mould; the outer surface of the bottom side of the lens male die and the inner surface of the bottom side of the lens female die form a lens forming cavity; an overflow cavity is formed between the outer side surface of the lens male die and the inner side surface of the lens female die; a residual material cutting part is arranged between the forming cavity and the overflow cavity; a waste discharge groove is formed in the lens male die; the upper side of the lens male die on the residual material cutting part is provided with a through hole for connecting the overflow cavity and the waste discharge groove. The molding mechanism comprises a lens male die molding mechanism and a lens female die molding mechanism. According to the mold for processing the contact lens, the exhaust holes are formed, so that exhaust and residual material discharge can be performed in the mold closing process to the waste discharge groove, the generation of bubbles is reduced, and the yield of the contact lens is improved; the forming mechanism of the die is ingenious in design, and can form the exhaust hole at one time, so that the forming precision of the lens male die and the lens female die is guaranteed, and the yield of the contact lens is improved.
Description
Technical Field
The invention relates to the field of optical lens forming, in particular to a mold for processing a contact lens and a forming mechanism of the mold.
Background
The contact lens is formed by die pressing, mainly comprising an upper die and a lower die, and is processed into a required shape by mechanically applying a certain pressure. Existing contact lens production has two modes:
one is half-mold pressing production technology, which is also to mold through an upper mold and a lower mold, when half-mold pressing is used for turning a lens, the edge is not turned to be V-shaped due to unstable air pressure or equipment problem, so that the edge of the lens is not round and smooth, the contact requirement of eyeballs is not met, the lens is worn in eyes, foreign matters abrade eyes, and the lens feel uncomfortable;
the other is a full mould pressing production process, namely, the required contact lens is processed through an upper mould and a lower mould at one time, the formed lens has a degree, and the edge treatment accords with eyeball contact. However, in the preparation of full-mold lenses, when the upper and lower molds are clamped, a certain amount of excess material and bubbles are generated, and the molded lenses become waste sheets, which seriously affects the yield of the lenses.
Disclosure of Invention
In order to solve the technical problems, the invention provides a mold for processing a contact lens, wherein a through hole is formed in the upper side of the edge of a lens male mold close to a forming cavity, and when the mold is closed, exhaust and discharge materials can be discharged into a waste discharge groove in the lens male mold, so that the generation of bubbles is reduced, and the yield of the contact lens is improved; the invention also provides a forming mechanism of the die, which has ingenious design, can form the through hole at one time, ensures the forming precision of the convex die and the concave die of the lens, and is beneficial to improving the yield of the contact lens.
The technical scheme adopted for solving the technical problems is as follows: a mold for processing a contact lens, comprising a lens male mold and a lens female mold; the bottom side of the lens male die is provided with a first molding part, and the lower surface of the first molding part forms a first molding cambered surface; the bottom side of the lens female die is provided with a second molding part, and the upper surface of the second molding part forms a second molding cambered surface; when the mold is closed, the bottom end of the lens male mold is inserted into the lens female mold, so that a lens molding cavity is formed between the first molding cambered surface and the second molding cambered surface; an overflow cavity is formed between the outer side surface of the lens male die above the first forming part and the inner side surface of the lens female die above the second forming part; the lens male die and the lens female die are contacted at the position between the lens forming cavity and the overflow cavity to form a residual material cutting part; the lens male die is internally provided with a waste discharge groove; and a through hole for connecting the overflow cavity and the waste discharge groove is formed in the upper side of the residual material cutting part of the lens male die.
Further, the lens male die further comprises a male die middle part positioned on the upper side of the first forming part; the lens female die further comprises a female die upper part positioned at the upper side of the second molding part; the outer side of the lens male die forms a first step surface between the middle part of the male die and the first forming part; the wind side of the lens female die forms a second step surface between the upper part of the female die and the second molding part; the first step surface and the second step surface are matched to form the excess material cutting part.
Further, the lens male die further comprises a male die upper part positioned on the upper side of the middle part of the male die; the outer side of the lens male die forms a third step surface between the upper part of the male die and the middle part of the male die; the third step surface is matched with the upper end surface of the upper part of the female die to form a limit part; the inner side surface of the upper part of the female die and the outer side surface of the middle part of the male die form the overflow cavity.
Further, a first groove in the up-down direction is formed in the inner surface of the lens male die; the bottom end of the first groove is intersected with the outer surface of the lens male die to form the through hole.
Further, reinforcing ribs are arranged in the first grooves of the holes.
Further, a close-fitting block is arranged at the position, close to the upper side, of the outer side surface of the middle part of the male die; the tight-fit block is tightly matched with the inner side surface of the upper part of the female die.
A molding mechanism for a mold for processing a contact lens includes a lens male molding mechanism and a lens female molding mechanism.
Further, the lens male die forming mechanism comprises a first upper die holder, a first upper die liner, a first lower die sleeve and a first lower die core; the first upper die liner is arranged at the bottom end of the first upper die holder; the first lower die core is arranged at a position which is lower than the inner side of the first lower die sleeve; the first upper die liner and the first upper die holder are inserted into the upper position of the inner side of the first lower die sleeve; the outer surface of the first upper die holder, the outer surface of the first upper die liner, the inner surface of the first lower die sleeve and the upper surface of the first lower die core form a die cavity for forming a lens male die; the lower surface of the first upper die liner and the upper surface of the first lower die core are used for forming a first forming part of the lens male die.
Further, an open hole column is further arranged at the bottom of the side face of the first upper die holder; the perforated column is used for forming a first groove of the lens male die; the bottom of the outer side surface of the open hole column is matched with the inner side surface of the first lower die sleeve and is used for forming a through hole of a lens male die; the outer side surface of the perforated column is also provided with a second groove for forming a reinforcing rib of the lens male die; the inner side surface of the open hole column is matched with the outer surface of the first upper die liner.
The lens female die forming mechanism comprises a second upper die holder, a second upper die liner, a second lower die sleeve and a second lower die core; the second upper die liner is arranged at the bottom end of the second upper die holder; the second lower die core is arranged at a position which is lower than the inner side of the second lower die sleeve; the second upper die liner and the second upper die holder are inserted into the upper position of the inner side of the second lower die sleeve; the outer surface of the second upper die holder, the outer surface of the second upper die liner, the inner surface of the second lower die sleeve and the upper surface of the second lower die core form a die cavity for forming a lens female die; the lower surface of the second upper die liner and the upper surface of the second lower die core are used for forming a second forming part of the lens female die.
The invention has the advantages that: according to the mold for processing the contact lens, through the through hole formed in the male mold of the contact lens, when the mold is closed, exhaust and discharge can be performed, so that the generation of bubbles is reduced, and the yield of the contact lens is improved; the through hole is designed above and close to the residual material cutting part of the lens male die, so that the residual materials and the bubbles can be discharged more quickly and better nearby; the residual materials are discharged into a waste discharge groove in the lens male die through the through hole, and the waste discharge groove has a certain space, can accommodate and store the residual materials, and avoids the influence of the overflow of the residual materials on processing; the through hole is formed by forming the first groove, so that the processing is easy, and the mechanical strength of the side wall of the lens male die at the first groove is ensured by a reinforcing rib mode; the arrangement of the tight-fit blocks can ensure the concentricity of the lens male die and the lens female die, so as to further ensure the quality of the contact lens, and meanwhile, the design of the limit part is matched, so that the phenomenon that the lens male die is not pressed in place or over-pressure phenomenon is avoided, and meanwhile, the concentricity of the lens male die and the lens female die is further ensured; in the forming mechanism for processing the mould of the contact lens, the design of the perforating column of the lens male mould forming mechanism greatly reduces the through hole forming difficulty of the lens male mould, one-step forming is realized, additional perforating operation is not needed, the lens male mould forming mechanism and the lens female mould forming mechanism are simple in structure and ingenious in design, the forming precision of the lens male mould and the lens female mould is ensured, and the yield of the contact lens is improved.
Drawings
Fig. 1 is a schematic perspective view of a mold for processing a contact lens according to a first embodiment;
fig. 2 is a schematic perspective view of a lens male of a mold for processing a contact lens according to the first embodiment;
FIG. 3 is a schematic front view of a lens male of a mold for processing a contact lens according to the first embodiment;
fig. 4 is a schematic perspective view of a lens cavity die of a mold for processing a contact lens according to the first embodiment;
fig. 5 is a schematic front view of a lens cavity block of a mold for processing a contact lens according to the first embodiment;
FIG. 6 is a schematic illustration of the internal fit of a mold for processing a contact lens according to the first embodiment;
fig. 7 is a perspective view of a lens male mold forming mechanism of a mold for processing a contact lens according to the second embodiment;
fig. 8 is a schematic view showing the structure of the internal fit of a lens male mold forming mechanism of a mold for processing a contact lens according to the second embodiment;
fig. 9 is a schematic perspective view of a first upper die holder of a lens punch forming mechanism of a forming mechanism for a mold for processing a contact lens according to the second embodiment;
fig. 10 is a schematic perspective view of a lens cavity mold forming mechanism of a mold for processing a contact lens according to the second embodiment;
fig. 11 is a schematic diagram showing the internal cooperation of a lens cavity mold forming mechanism of a mold for processing a contact lens according to the second embodiment.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, which are only for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
Referring to fig. 1 to 6, the present embodiment provides a mold for processing a contact lens, which includes a lens male mold 1 and a lens female mold 2; the lens male die 1 and the lens female die 2 are cylindrical with U-shaped sections; the bottom side of the lens male die 1 is provided with a first molding part 103, and the lower surface of the first molding part 103 forms a first molding cambered surface; the bottom side of the lens female die 2 is provided with a second molding part 22, and the upper surface of the second molding part 22 forms a second molding cambered surface; when the mold is closed, the bottom end of the lens male mold 1 is inserted into the lens female mold 2, so that a lens molding cavity 3 is formed between the first molding cambered surface and the second molding cambered surface; an overflow cavity 4 is formed between the outer side surface of the lens male die 1 above the first forming part 103 and the inner side surface of the lens female die 2 above the second forming part 22; the lens male die 1 and the lens female die 2 are contacted at a position between the lens forming cavity 3 and the overflow cavity 4 to form a remainder cutting part 5; the lens male die 1 is internally provided with a waste discharge groove 109; the upper side of the excess material cutting part of the lens male die 1 is provided with a through hole 106 for connecting the overflow cavity 4 and the waste discharge groove.
Referring again to fig. 2 to 6, the lens male mold 1 further includes a male mold middle portion 102 located on the upper side of the first molding portion 103; the lens female die 2 further comprises a female die upper part 21 positioned on the upper side of the second forming part 22; the outer side of the lens male die 1 forms a first step surface 105 between the male die middle part 102 and the first forming part 103; a second step surface 24 is formed between the upper die part 21 and the second molding part 22 on the wind side of the lens die 2; the first step surface 105 and the second step surface 24 cooperate to form the remainder cutting portion 5.
Referring again to fig. 2 to 6, the lens punch 1 further comprises a punch upper portion 101 located on the upper side of a punch middle portion 102; the outer side of the lens male die 1 forms a third step surface 104 between the male die upper part 101 and the male die middle part 102; the third step surface 104 is matched with the upper end surface 23 of the die upper part 21 to form a limit part 6; the inner surface of the die upper part 21 and the outer surface of the punch middle part 102 form the overflow cavity 4.
Referring again to fig. 2 and 6, in order to match the arrangement of the first step surface 105 and the third step surface 104 and ensure that the lens male mold has sufficient wall thickness to ensure mechanical strength, the inside of the lens male mold is also stepped, and has a fourth step surface 111 and a fifth step surface 112; the fourth step surface 111 is higher than the third step surface 104, and the fifth step surface 112 is higher than the first step surface 105.
Referring to fig. 2 and 6 again, the inner surface of the lens male mold 1 is provided with a first groove 107 in the up-down direction; the bottom end of the first groove 107 intersects with the outer surface of the lens male die 1 to form the through hole 106; wherein, the depth direction of the first groove 107 is the radial direction of the cylindrical lens male die 1, and the length direction is the up-down direction; the top side of the first groove 107 is provided with an opening at the fourth step surface 111.
Referring again to fig. 2 and 6, a reinforcing rib 108 is further disposed in the first slot 107; the first groove 107 intersects with the outer surface of the lens male mold 1, and a certain angle is required between the first groove 107 and the outer surface of the lens male mold 1, instead of being parallel, so that the wall thickness of the lens male mold 1 at the position of forming the first groove 107 gradually becomes thinner from top to bottom until the opening is formed, and in order to ensure the mechanical strength of the side wall of the lens male mold after thinning, a plurality of reinforcing ribs 108 can be arranged to connect two side surfaces of the first groove 107, and the upper edge and the lower edge of the reinforcing ribs 108 are rounded, so as to reduce the difficulty of demolding.
Referring to fig. 2 and 3 again, a close-fitting block 110 is further disposed on the outer side surface of the middle part 102 of the male die near the upper side; the tight fitting block 110 is tightly fitted with the inner side of the die upper portion 21.
In the mold for processing a contact lens of this embodiment, a fixed amount of lens material (for example, silicone hydrogel) is injected into a lens female mold, then a lens male mold and the lens female mold are clamped, the outer sides of the lens male molds are distributed in a stepwise manner, so that the lens male mold is advantageously inserted into the lens female mold, and a first molding part of the lens male mold and a second molding part of the lens female mold are centered by a tight fit block and a limiting part, the distance between the first molding part and the second molding part is controlled, the first molding part is contacted with the lens material during the clamping process of the lens male mold and the lens female mold, and air bubbles are gradually extruded, so that the lens material is fully filled between the first molding part and the second molding part, when the lens male mold is lowered to clamp the lens female mold, a remainder cutting part is formed, the connection between the remainder and the lens female mold is cut, and the remainder and the air bubbles are discharged into a waste cavity in the lens male mold through a through opening next to the remainder cutting part, and cannot overflow from the upper opening.
According to the mold for processing the contact lens, through the arrangement of the through hole on the male mold of the contact lens, when the mold is closed, exhaust and discharge can be performed, so that the generation of bubbles is reduced, and the yield of the contact lens is improved; the through hole is designed above and close to the residual material cutting part of the lens male die, so that the residual materials and the bubbles can be discharged more quickly and better nearby; the residual materials are discharged into a waste discharge groove in the lens male die through the through hole, and the waste discharge groove has a certain space, can accommodate and store the residual materials, and avoids the influence of the overflow of the residual materials on processing; the through hole is formed by forming the first groove, so that the processing is easy, and the mechanical strength of the side wall of the lens male die at the first groove is ensured by a reinforcing rib mode; the arrangement of the close-fitting blocks can ensure the concentricity of the convex lens mold and the concave lens mold, thereby ensuring the quality of the contact lens; the design of the limiting part can avoid the phenomenon that the lens male die is not pressed in place or the phenomenon of overpressure occurs, and further ensures the concentricity of the lens male die and the lens female die.
Example two
Referring to fig. 7 to 11, the present embodiment provides a molding mechanism for a mold for processing a contact lens, which includes a lens male mold molding mechanism 7 and a lens female mold molding mechanism 8.
Referring to fig. 7 and 8, the lens male mold forming mechanism 7 includes a first upper mold base 71, a first upper mold liner 73, a first lower mold sleeve 72, and a first lower mold core 74; the first upper die liner 73 is installed at the bottom end of the first upper die holder 71; the first lower die core 74 is installed at a position below the inner side of the first lower die sleeve 72; the first upper die bushing 73 and the first upper die holder 71 are inserted in the upper position inside the first lower die sleeve 72; the outer surface of the first upper die base 71, the outer surface of the first upper die liner 73, the inner surface of the first lower die sleeve 72 and the upper surface of the first lower die core 74 form a cavity for forming the lens male die 1; wherein, the lower surface of the first upper mold liner 73 and the upper surface of the first lower mold core 74 are used for molding the first molding portion 103 of the lens male mold 1.
Referring to fig. 8 and 9, the bottom of the side surface of the first upper die holder 71 is further provided with an opening column 75; the open hole column 75 is used for forming a first groove 107 of the lens male die 1; the bottom of the outer side surface of the open hole column 75 is matched with the inner side surface of the first lower die sleeve 72 and is used for forming a through hole 106 of the lens male die 1; the outer side surface of the perforated column 75 is also provided with a second groove 76 for forming a reinforcing rib 108 of the lens male die 1; the inner side surface of the open hole column 75 is matched with the outer surface of the first upper die liner 73; the outer surface of the opening column 75 may be slightly inclined outwards from top to bottom, or the inner surface of the first lower die sleeve 82 in the middle of the forming punch may be slightly inclined inwards from top to bottom, or other design methods may be adopted, as long as the purpose of forming the through hole through the opening column is achieved.
Referring to fig. 10 and 11 again, the lens female mold forming mechanism 8 includes a second upper mold base 81, a second upper mold liner 83, a second lower mold sleeve 82, and a second lower mold core 84; the second upper die bushing 83 is installed at the bottom end of the second upper die holder 81; the second lower die core 84 is installed at a position below the inner side of the second lower die sleeve 82; the second upper die bushing 83 and the second upper die holder 81 are inserted in the position on the inner side of the second lower die sleeve 82; the outer surface of the second upper die holder 81, the outer surface of the second upper die liner 83, the inner surface of the second lower die sleeve 82, and the upper surface of the second lower die core 84 form a cavity for molding the lens female die 2; the lower surface of the second upper mold insert 83 and the upper surface of the second lower mold insert 84 are used for forming the second forming portion 22 of the lens female mold 2.
In a molding mechanism of a mold for processing a contact lens of the present embodiment:
processing a lens male die: the method comprises the steps of installing and fixing a first upper die holder and a first upper die liner, enabling the outer side edge of the fixed first upper die liner to be in contact with the inner surface of an opening column of the first upper die holder, and installing and fixing a first lower die core at a position below a first lower die sleeve; when the mold is closed, the combination of the first upper mold base and the first upper mold liner is downwards inserted into the first lower mold core to form a cavity of the molding lens male mold, wherein the width dimension of the opening column is smaller, and a second groove is further formed in the opening column, so that the contact area between the opening column and the inner side surface of the middle part of the molding male mold and the stroke of the opening column and the inner side surface of the first lower mold sleeve are smaller, and the outer side surface of the bottom end of the opening column can smoothly reach a preset position and be contacted with the inner side surface of the first lower mold sleeve; then, injecting a lens male die material into the cavity, forming a lens male die, and forming a through hole in one step by the lens male die through the arrangement of the hole opening column;
processing a lens female die: the second upper die holder and the second upper die liner are installed and fixed, and the second lower die core is installed and fixed at a position of the second lower die sleeve; and when the mold is closed, the combination of the second upper mold base and the second upper mold liner is downwards inserted into the second lower mold core to form a cavity for molding the lens female mold, and then, a lens female mold material is injected into the cavity to mold the lens female mold.
In the forming mechanism of the die for processing the contact lens, due to the design of the perforated column of the lens male die forming mechanism, the through hole forming difficulty of the lens male die is greatly reduced, one-step forming is realized, additional perforation operation is not needed, the lens male die forming mechanism and the lens female die forming mechanism are simple in structure and ingenious in design, the forming precision of the lens male die and the lens female die is guaranteed, and the yield of the contact lens is improved.
The above embodiments should not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.
Claims (7)
1. A molding mechanism for a mold for processing a contact lens, comprising: comprises a lens male die forming mechanism and a lens female die forming mechanism; wherein, the mould for processing the contact lens comprises a lens male mould and a lens female mould; the bottom side of the lens male die is provided with a first molding part, and the lower surface of the first molding part forms a first molding cambered surface; the bottom side of the lens female die is provided with a second molding part, and the upper surface of the second molding part forms a second molding cambered surface; when the mold is closed, the bottom end of the lens male mold is inserted into the lens female mold, so that a lens molding cavity is formed between the first molding cambered surface and the second molding cambered surface; an overflow cavity is formed between the outer side surface of the lens male die above the first forming part and the inner side surface of the lens female die above the second forming part; the lens male die and the lens female die are contacted at the position between the lens forming cavity and the overflow cavity to form a residual material cutting part; the lens male die is internally provided with a waste discharge groove; the upper side of the lens male die is provided with a through hole for connecting the overflow cavity and the waste discharge groove;
the lens male die forming mechanism comprises a first upper die holder, a first upper die liner, a first lower die sleeve and a first lower die core; the first upper die liner is arranged at the bottom end of the first upper die holder; the first lower die core is arranged at a position which is lower than the inner side of the first lower die sleeve; the first upper die liner and the first upper die holder are inserted into the upper position of the inner side of the first lower die sleeve; the outer surface of the first upper die holder, the outer surface of the first upper die liner, the inner surface of the first lower die sleeve and the upper surface of the first lower die core form a die cavity for forming a lens male die; the lower surface of the first upper die liner and the upper surface of the first lower die core are used for forming a first forming part of the lens male die;
the lens female die forming mechanism comprises a second upper die holder, a second upper die liner, a second lower die sleeve and a second lower die core; the second upper die liner is arranged at the bottom end of the second upper die holder; the second lower die core is arranged at a position which is lower than the inner side of the second lower die sleeve; the second upper die liner and the second upper die holder are inserted into the upper position of the inner side of the second lower die sleeve; the outer surface of the second upper die holder, the outer surface of the second upper die liner, the inner surface of the second lower die sleeve and the upper surface of the second lower die core form a die cavity for forming a lens female die; the lower surface of the second upper die liner and the upper surface of the second lower die core are used for forming a second forming part of the lens female die.
2. A molding mechanism for a mold for processing contact lenses as defined in claim 1, wherein: the lens male die further comprises a male die middle part positioned on the upper side of the first forming part; the lens female die further comprises a female die upper part positioned at the upper side of the second molding part; the outer side of the lens male die forms a first step surface between the middle part of the male die and the first forming part; the wind side of the lens female die forms a second step surface between the upper part of the female die and the second molding part; the first step surface and the second step surface are matched to form the excess material cutting part.
3. A molding mechanism for a mold for processing contact lenses as defined in claim 2, wherein: the lens male die further comprises a male die upper part positioned on the upper side of the middle part of the male die; the outer side of the lens male die forms a third step surface between the upper part of the male die and the middle part of the male die; the third step surface is matched with the upper end surface of the upper part of the female die to form a limit part; the inner side surface of the upper part of the female die and the outer side surface of the middle part of the male die form the overflow cavity.
4. A molding mechanism for a mold for use in processing contact lenses according to any one of claims 1-3, wherein: the inner surface of the lens male die is provided with a first groove in the up-down direction; the bottom end of the first groove is intersected with the outer surface of the lens male die to form the through hole.
5. A molding mechanism for a mold for processing a contact lens as recited in claim 4, wherein: reinforcing ribs are further arranged in the first grooves of the holes.
6. A molding mechanism for a mold for use in processing contact lenses according to claim 2, 3 or 5, wherein: a close-fit block is further arranged at the position, close to the upper side, of the outer side surface of the middle part of the male die; the tight-fit block is tightly matched with the inner side surface of the upper part of the female die.
7. A molding mechanism for a mold for processing a contact lens as recited in claim 5, wherein: the bottom of the side surface of the first upper die seat is also provided with an open hole column; the perforated column is used for forming a first groove of the lens male die; the bottom of the outer side surface of the open hole column is matched with the inner side surface of the first lower die sleeve and is used for forming a through hole of a lens male die; the outer side surface of the perforated column is also provided with a second groove for forming a reinforcing rib of the lens male die; the inner side surface of the open hole column is matched with the outer surface of the first upper die liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110171070.3A CN112976456B (en) | 2021-02-08 | 2021-02-08 | Mold for processing contact lens and molding mechanism of mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110171070.3A CN112976456B (en) | 2021-02-08 | 2021-02-08 | Mold for processing contact lens and molding mechanism of mold |
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| Publication Number | Publication Date |
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| CN112976456A CN112976456A (en) | 2021-06-18 |
| CN112976456B true CN112976456B (en) | 2023-04-25 |
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| TWM487831U (en) * | 2014-06-23 | 2014-10-11 | Chen Steel Mold Co Ltd Sa | Buckle-type contact lens mold |
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