阅读说明：本技术 一种透镜成型的模具 (Lens forming die ) 是由 李韶华 陈良全 张连山 李家如 朱林 于 2020-03-31 设计创作，主要内容包括：本发明涉及透镜成型技术领域,公开了一种透镜成型的模具,包括第一模具和第二模具,第一模具和第二模具上分别设有相互扣合的环形凸起和环形凹槽,扣合状态下的第一模具和第二模具之间形成成型腔,第一模具和第二模具之间设有与成型腔连通的注液通道和用于封堵注液通道的第一封堵结构,注液通道和第一封堵结构设置在竖直状态下的第一模具和第二模具之间的上部位置；本发明提供的一种透镜成型的模具,避免透镜成型过程中气泡的产生,能够控制和降低反应液的使用量,以便更好的执行生产计划,结构简单、操作方便,降低生产成本,简化工序和降低环境污染。(The invention relates to the technical field of lens forming, and discloses a lens forming mold, which comprises a first mold and a second mold, wherein the first mold and the second mold are respectively provided with an annular bulge and an annular groove which are mutually buckled, a forming cavity is formed between the first mold and the second mold in a buckled state, a liquid injection channel communicated with the forming cavity and a first blocking structure for blocking the liquid injection channel are arranged between the first mold and the second mold, and the liquid injection channel and the first blocking structure are arranged at the upper part between the first mold and the second mold in a vertical state; the lens forming die provided by the invention avoids the generation of bubbles in the lens forming process, can control and reduce the use amount of the reaction liquid so as to better execute a production plan, has a simple structure, is convenient to operate, reduces the production cost, simplifies the working procedures and reduces the environmental pollution.)

1. A lens forming mold is characterized in that: including first mould and second mould, be equipped with annular protrusion and the annular groove of mutual lock on first mould and the second mould respectively, form the shaping chamber between first mould and the second mould under the lock state, be equipped with between first mould and the second mould with the notes liquid passageway of shaping chamber intercommunication and be used for the first shutoff structure of shutoff notes liquid passageway, annotate the upper portion position of liquid passageway and first shutoff structure setting between first mould and the second mould under vertical state.

2. A lens-forming mold according to claim 1, wherein: the middle part of first mould and second mould is relative first shaping portion and the second shaping portion that sets up respectively, first shaping portion is located the bellied inboard of annular, first shaping portion includes annular brace table and middle part shaping district, middle part shaping district is located the inboard of annular brace table, the second shaping portion is located the inboard of annular groove, second shaping portion and annular brace table butt form the shaping chamber between middle part shaping district and second shaping portion.

3. A lens-forming mold according to claim 2, wherein: first block structure is including setting up the spout on first mould and setting up the slider on the second mould, slider and spout sliding fit, annotate the liquid passageway and run through the spout and extend to annular brace table's inside wall after with the shaping chamber intercommunication.

4. A lens-forming mold according to claim 3, wherein: the bottom of the sliding groove is positioned below the liquid injection channel.

5. The lens-forming mold according to claim 4, wherein: the liquid injection channel comprises a liquid inlet communicated with the sliding groove, and the liquid inlet is positioned between two ends of the sliding groove.

6. A lens-forming mold according to claim 5, wherein: the sliding groove is an arc-shaped sliding groove, the circumference where the arc-shaped edge of the arc-shaped sliding groove is located and the outer circumference of the forming cavity are of concentric circle structures, the sliding block is an arc-shaped sliding block, and the circumference where the arc-shaped edge of the arc-shaped sliding block is located and the circumference where the arc-shaped edge of the arc-shaped sliding groove is located are of concentric circle structures.

7. A lens-forming mold according to claim 2, wherein: and an exhaust channel and a second plugging structure for plugging the exhaust channel are also arranged between the first die and the second die.

8. A lens-forming mold according to claim 7, wherein: the exhaust channel is arranged at the upper ends of the first die and the second die, and the liquid injection channel is arranged at the upper side parts of the first die and the second die.

9. A lens-forming mold according to claim 8, wherein: be equipped with two hollow sharp pipes and two plugs between first mould and the second mould, annotate liquid passageway and exhaust passage and form respectively in the inside of two hollow sharp pipes, two plugs are first shutoff structure and second shutoff structure respectively, be equipped with the plug mounting groove that is used for installing two plugs and the sharp pipe mounting groove that is used for installing two hollow sharp pipes between first mould and the second mould respectively, the one end of hollow sharp pipe inserts and passes behind the plug and communicates with the shaping chamber.

10. A lens-forming mold according to claim 9, wherein: the annular supporting table and the second die are provided with extending grooves extending from the inner ends of the rubber plug mounting grooves to the forming cavity, and the inner ends of the extending grooves are flush with the inner side wall of the annular supporting table and are communicated with the forming cavity.

Technical Field

The invention relates to the technical field of lens molding, in particular to a lens molding die.

Background

Currently, the production of ophthalmic lenses, such as intraocular lenses, contact lenses, etc., has been developed using a compression molding technique. A lens forming mold comprises an upper part and a lower part. In the molding process, the lower part of the mold is kept flat all the time, the residual chemical liquid is added into the lower half part of the flat mold, then the upper half part of the mold is covered on the lower half mold, the molding cavity formed between the upper mold part and the lower mold part is filled with the chemical liquid, and then the chemical liquid is subjected to polymerization reaction through ultraviolet light or heat treatment, so that a semi-finished product of the lens or the lens is molded in the molding cavity formed between the upper mold part and the lower mold part.

In the whole production process, because the upper part and the lower part of the die are horizontally arranged, the following 3 problems occur:

(1) when the upper mold half is closed, air bubbles sometimes appear in the molding cavity, and the presence of the air bubbles will cause the final polymerization molded product to be unqualified.

(2) Uncontrollable production plan: because the generation of bubbles in the molding cavity may need to be operated again to inject the reaction liquid, and because the generation of bubbles is uncontrollable and unpredictable, the dosage of the chemical reaction liquid cannot be prepared in production, thereby affecting the fluency and the planning of the whole production process; in addition, because the mold is horizontally placed, the contact surface of the reaction liquid on the surface of the mold is large, and the difference of the attachment shapes on the surface of the mold is large, so that the filling condition of the reaction liquid in the lower half part of the mold is inconsistent when each product is added with the reaction liquid, more reaction liquid needs to be added in order to reduce the generation of bubbles in the process of covering the upper half part of the mold, the requirement on the operation experience of covering the upper half part of the mold is high, otherwise, the formation of the bubbles is multiplied, and the material waste is caused. In this process, the production schedule is not controllable, and more reaction solution needs to be prepared.

(3) More reaction liquid needs to be added in the lower half part of the mold to reduce the probability of bubbles in the process of covering the upper half part of the mold, but the occurrence of bubbles cannot be avoided. The excess chemical raw materials are finally not recyclable, thereby increasing the cost (chemical raw materials are expensive). The excessive chemical raw materials are remained in the die, and polymerization reaction also occurs in the polymerization forming process to become an unusable solid material which is difficult to remove, so that the subsequent production process is increased; meanwhile, the waste solid materials will cause environmental pollution.

Disclosure of Invention

In view of the problems in the prior art, the invention provides a lens forming mold, which avoids the generation of bubbles in the lens production process, can control and reduce the usage amount of reaction liquid so as to better execute a production plan, has a simple mold structure, is convenient to operate, reduces the production cost, simplifies the process and reduces the environmental pollution.

The technical scheme adopted by the invention is as follows:

the utility model provides a lens fashioned mould, includes first mould and second mould, be equipped with annular protrusion and the annular groove of mutual lock on first mould and the second mould respectively, form the molding chamber between first mould and the second mould under the lock state, be equipped with between first mould and the second mould with the first shutoff structure of annotating the liquid passageway with the injection molding chamber intercommunication and being used for the shutoff to annotate the liquid passageway, annotate the upper portion position of liquid passageway and first shutoff structure setting between first mould and the second mould under vertical state.

In the shaping operation process, first mould and second mould dock together according to specific position earlier, annular arch and annular groove lock, annotate the liquid passageway simultaneously and keep the state with the shaping chamber intercommunication, and keep forming die's vertical state, because will annotate the upper portion of liquid passageway setting between first mould and second mould, be vertical placing state at whole forming die, annotate the liquid passageway injection reaction liquid from the upper portion, at the in-process of injecting the reaction liquid, rely on the action of gravity, the whole shaping chamber will be filled gradually from the lower part of shaping chamber to the reaction liquid, the air in the shaping intracavity simultaneously passes through annotates the liquid passageway and discharges, thereby restrain the production of bubble, avoid traditional mould at the shaping lens in-process because the unqualified problem of product that the bubble leads to.

This lens forming die's upper portion is equipped with annotates the liquid passageway, reaction liquid pours into the shaping intracavity into through annotating the liquid passageway, annotating the liquid in-process, forming die is vertical to be placed, after annotating the liquid and accomplishing, realize the shutoff to annotating the liquid passageway through first shutoff structure, the shaping chamber forms airtight space, thereby the product shaping, owing to at the in-process of pouring into reaction liquid toward the shaping intracavity, reaction liquid is in the shaping intracavity all the time, can not spill over outside the shaping chamber, then reduced because reaction liquid spills over the raw materials loss outside the shaping chamber. Meanwhile, the volume of the forming cavity is fixed and controllable, and the addition amount of the reaction liquid is stable and controllable, so that the production plan is more accurate in formulation and raw material use prediction, and the execution of the production plan is more facilitated. The volume of the reaction liquid injected into the molding cavity is almost the same as the volume required by molding, so that the reaction liquid is not wasted in the whole process.

Further, in order to facilitate the sealing of the molding cavity, the middle parts of the first mold and the second mold are respectively a first molding part and a second molding part which are arranged oppositely, the first molding part is located on the inner side of the annular protrusion, the first molding part comprises an annular supporting table and a middle molding area, the middle molding area is located on the inner side of the annular supporting table, the second molding part is located on the inner side of the annular groove, and the second molding part abuts against the annular supporting table and forms the molding cavity between the middle molding area and the second molding part.

Further, in order to do benefit to the intercommunication of being convenient for to realize notes liquid passageway and shaping chamber simultaneously to closing of notes liquid passageway, first block structure is including setting up the spout on first mould and the slider of setting on the second mould, slider and spout sliding fit, annotate the liquid passageway and run through the spout and extend to annular brace table's inside wall after with shaping chamber intercommunication.

Further, in order to facilitate the closing of the liquid injection channel, the bottom of the sliding groove is positioned below the liquid injection channel.

Further, in order to be favorable to closing the liquid injection channel, the liquid injection channel comprises a liquid inlet communicated with the sliding groove, and the liquid inlet is positioned between two ends of the sliding groove.

Further, in order to be favorable to closing the liquid injection channel, the liquid injection channel comprises a liquid inlet communicated with the sliding groove, the liquid inlet is positioned between two ends of the sliding groove, and the distance between the liquid inlet and two ends of the sliding groove is greater than zero.

Further, in order to realize that first mould and second mould rotate the in-process relatively, the slider removes and realizes the shutoff to annotating the liquid passageway along the spout, the spout is the arc spout, the circumference at the arc limit place of arc spout and the outer circumference of shaping chamber are concentric circle structure, the slider is the arc slider, the circumference at the arc limit place of arc slider and the circumference at the arc limit place of arc spout are concentric circle structure.

Further, in order to facilitate the discharge of air in the molding cavity and realize the sealing of the molding cavity, an exhaust channel and a second sealing structure for sealing the exhaust channel are further arranged between the first mold and the second mold.

Further, in order to be favorable to pouring into reaction liquid and make things convenient for the discharge of shaping intracavity air into the shaping intracavity, exhaust passage sets up the upper end at first mould and second mould, annotate the liquid channel setting on the side upper portion of first mould and second mould.

Further, for the convenience of sealing the molding cavity, be equipped with two hollow sharp pipes and two plugs between first mould and the second mould, annotate liquid passageway and exhaust passage and form respectively in the inside of two hollow sharp pipes, two plugs are first shutoff structure and second shutoff structure respectively, be equipped with the plug mounting groove that is used for installing two plugs and the sharp pipe mounting groove that is used for installing two hollow sharp pipes between first mould and the second mould respectively, the one end of hollow sharp pipe inserts and passes behind the plug and communicates with the molding cavity.

Further, for the convenience of being convenient for the hollow sharp pipe and the intercommunication in one-tenth die cavity simultaneously to the installation of plug, be equipped with the extending groove that extends to the one-tenth die cavity from the inner of plug mounting groove on annular brace table and the second mould, the inner of extending groove and annular brace table's inside wall parallel and level and this extending groove and one-tenth die cavity intercommunication.

In order to facilitate control and operation of the butt joint state between the first mold and the second mold, the first mold and the second mold are both in a triangular structure.

Drawings

Fig. 1 is a plan view of a first mold in examples 1 to 6 of the present invention;

fig. 2 is a sectional view of a first mold in examples 1 to 6 of the present invention;

fig. 3 is a plan view of a second mold in examples 1 to 6 of the present invention;

fig. 4 is a sectional view of a second mold in examples 1 to 6 of the present invention;

FIG. 5 is a sectional view showing a state where the reaction solution is injected in examples 1 to 6 of the present invention;

FIG. 6 is a plan view showing a state where the reaction solution is injected in examples 1 to 6 of the present invention;

fig. 7 is a plan view showing a closed state of the cavity in embodiments 1 to 6 of the present invention;

fig. 8 is a top view of the first mold in examples 7 to 10 of the present invention;

fig. 9 is a sectional view of the first mold in examples 7 to 10 of the present invention;

fig. 10 is a top view of a second mold according to examples 7 to 10 of the present invention;

fig. 11 is a sectional view of a second mold in examples 7 to 10 of the present invention;

FIG. 12 is a sectional view showing a snap-fit state of the molding dies in examples 7 to 10 of the present invention;

FIG. 13 is a plan view showing the state of the reaction solution injected in examples 7 to 10 of the present invention.

In the figure: a first mold 1; a second mold 2; an annular projection 3; an annular groove 4; a molding cavity 5; a liquid injection passage 6; a liquid inlet 6.1; an annular support table 7; a middle forming zone 8; a second molding section 9; a slider 10; a chute 11; an exhaust passage 12; a rubber plug 13; a plug mounting groove 14; a spike tube mounting slot 15; an extension slot 16.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following figures and specific embodiments.