JP4360676B2 - Master mold tape sticking device for plastic lens molding - Google Patents

Description

The present invention provides a mold for plastic lenses used for spectacles and the like, and a plastic lens capable of automating a tape attaching operation to both outer peripheral surfaces of a pair of two mold dies having a desired material filling gap. The present invention relates to a molding mold tape sticking device for molding.

Recently, mass production and cost reduction have been demanded also in the lens field of eyeglass products, and the material of the momentum lens itself has shifted to a so-called plastic lens using a plastic material that can be molded. In this case, as the plastic lens processing, a mold having a predetermined material filling gap in the middle is required. In general, this type of plastic lens mold is formed by using two mold molds (concave glass) having an appropriate diameter and curvature, and a desired material filling gap between the two mold molds. In this state, tapes of a certain width are sequentially attached to both outer peripheral surfaces of both molds so as to follow the circumference, and the filling gap (cavity) of the lens material in both molds is obtained. The mother mold is formed.

That is, in assembling the plastic lens mold, there is a problem of the tape mold operation for forming a pair of two lens molds (matrix mold) and a predetermined material filling gap. If the material filling gap is not surely set, it is filled with a plastic material (for example, a normal castable monomer or a pre-monomer liquid curable compound),
It is difficult to obtain a plastic lens having a desired thickness even if the adhesive tape is peeled off after a predetermined time has passed and both molds are removed. In addition, as an actual plastic material filling operation, a part of the tape affixed to the outer peripheral surface of the master mold is peeled off to provide a filling hole, a lens material is injected from the filling hole, and then the partly peeled tape Is sealed, and after the plastic material is hardened, the adhesive tape and both molds are separated.
Japanese Patent Publication No. 1-15366 Japanese Patent Publication No. 64-2483

However, two tape molds, which are the main parts of this plastic lens mold, stand up in parallel, and a tape is attached to a tape with a predetermined width that straddles both outer peripheral surfaces (circumferential surfaces) of the master mold. The current situation is that work (process) relies on manual work as it is. That is, in a state where the peripheral portions of the pair of mother molds are appropriately grasped by hand, they are erected in parallel so as to maintain a predetermined material filling gap, and a predetermined adhesive tape is applied to the outer peripheral surfaces of both mother molds while maintaining this parallel state. The base mold itself is wound while appropriately rotating, and a filling gap is formed between the two molds only after the adhesive tape reaches the entire outer peripheral surface of the mold.

In the process of winding the adhesive tape around the pair of master molds by manual winding work, it is necessary to maintain the parallelness so that the two master molds always have a distance corresponding to the thickness of the desired lens body, which requires skill. It becomes. In addition, at the present time, the mother mold forming mold process in which the two mother molds are parallel and wound with tape and the filling process that fills the plastic, which is the next process, are performed separately. For this reason, if there is a variation in the mold itself at the stage of obtaining the mold mold for which accuracy is desired, a plastic lens having a desired thickness will not increase even if the processing technology of the plastic filling company that received the mold mold is high. Cannot be obtained, and it is an extremely inefficient work. That is, individual differences are inevitably caused when the tape is wound manually, and the plastic lens finished based on this mold lacks uniformity in thickness, which in turn causes problems in later lens processing.

Furthermore, in the case of spectacle lens products, a lens according to the eyesight power of the customer to be ordered must be provided each time. However, there is a possibility that the plastic-filled mother mold as described above may vary. When a mold is used, it is inevitably impossible to obtain a plastic lens shape (size, etc.) having a desired lens power.

For example, as shown in Japanese Patent Publication No. 1-15366, the use of a jig for fitting a pair of mother molds, as shown in, for example, Japanese Patent Publication No. 1-15366, is aimed at mechanization of the mold assembly work for obtaining a plastic lens body. The two mold holders are opposed to each other in the vertical position, and at least one of them (upper side) is attached to the support rod end of the pendulum that can be moved up and down on a separately raised column. The tool mold mold is moved with respect to the mold mold of the lower mold holder so as to obtain a desired filling gap, and an adhesive tape having a predetermined width is wound around the peripheral surfaces of both mold molds in this state. As shown in Japanese Examined Patent Publication No. 64-2483, two mold holders for fitting a pair of mother molds are raised and opposed to the left and right, and both mold holders are arranged horizontally below. Attach to the upper end of the movable upright leg provided on both sides of the shaft, and move the movable mold holder back and forth to create a desired filling gap between the mother molds of the opposite fixed mold holder. An apparatus for forming and winding an adhesive tape around the peripheral surfaces of both mother molds is known.

As described above, in both of the lens casting molding apparatuses, the accuracy of forming the mold fitting grooves provided in both mold holders is taken into consideration because the optical axes of the opposite molds are matched. In other words, the gripping mechanism must be accurate.

In addition, the movement of both mold holders and the operation of winding the adhesive tape around the pair of mother molds set at a predetermined position are all performed manually, so-called semi-automatic operation efficiency. It has not yet been improved.

Therefore, in the plastic lens processing for spectacles, it is necessary to provide a master mold that responds to the lens degree when the lens degree changes each time, because the finished lens itself responds to the lens power of each person. However, there is a limit to both the mold mold assembly that relies solely on the sense of the hand and the tape winding of the adhesive tape by hand. For this reason, development of the mold holder which can save manual work as much as possible and the automatic winding apparatus of an adhesive tape which raises accuracy is awaited.

In view of the above situation, the present invention mechanically holds two mother molds in a cylindrical split mold holder, and transfers both mother molds in the holder to the suction unit side facing both sides. Disengagement of the claw by splitting the holder and removal of the holder when one of the suction units is retracted, and secondary movement of the suction unit to return both mold molds once separated to a predetermined position, a predetermined filling gap and the A plastic that solves the above-mentioned problems by taking into account the primary movement amount of the suction unit and automatically sticking the tape to the outer peripheral surface of both molds facing each other at a predetermined position with the adhesive tape from the tape attaching means An object of the present invention is to provide a matrix mold tape sticking device for lens molding.

The present invention relates to a tubular divided mold holder for temporary holding in which two mold molds for lenses are fitted on both sides, and each peripheral portion is engaged and held by a movable claw and the outer surface of the mold is exposed, and an intermediate part of the fuselage And a pad-type suction that sucks the center of the outer surface of one of the mother molds on both sides of the body located on the axis of the mold holder on the receiving roller body. A suction unit that moves in the axial direction provided with a rotating body part that places several reversible centering and supporting shafts that press the body and its peripheral part, and sucks the center of the outer surface of the other master mold A fixed-side suction unit provided with a pad body and a rotating body part for arranging a reversible centering and supporting shaft that presses the periphery of the pad-type suction body is opposed to each other. Type A tape-adhering means that tapes the outer peripheral surface of the mold and closes the opposing gap, and a moving-side adsorption unit that contacts the outer surfaces of both mold dies in the mold holder facing the receiving roller body by primary movement. Both mold molds held by the adsorbent and support shaft of the fixed-side suction unit and disengaged from the claw of the movable claw due to the mutual shift of the mold holder's split rotation are removed from the holder by retraction of the moving-side suction unit. A holder removal mechanism that leads to
Filling interval adjustment that sets the secondary moving distance for re-transferring this moving-side suction unit to the fixed-side suction unit where the other mold mold remains, taking into account the primary movement amount and the desired gap between the two mold molds Only the two mold molds that are equipped with a mechanism and are opposed to a predetermined distance at the intermediate part of the machine by the secondary movement of the moving side suction unit are rolled by the rotation of the tape presser and receiving rollers that are in contact with the lower side and the rotating unit side rotating body part. At the same time, an adhesive tape fed out from the tape adhering means facing the position directly above is adhered to the outer peripheral surfaces of both molds to form a filling gap for the lens material inside.

In this case, the cylindrical split mold holder has a three-part holder structure of a right and left outer guide cylinder with a mold guide / exposed window and a core holding barrel fitted in the middle, and both the outer rotary cylinder part and the middle By the reciprocal rotation of the tabs protruding from the outer peripheral parts of the core holding barrel, the mold mold peripheral edge part that enters from the mold guide and exposure window is moved by the movement of the movable claws with springs provided on both sides of the core holding barrel. Engage.

The centering and supporting shaft is a retractable supporting shaft with a spring attached to the base and a chuck mechanism at the end.

Both suction units are composed of a moving side suction unit having an electric slider driven by a pulse motor and a fixed side suction unit that receives only a spring buffer.

The tape adhering means is a combined configuration of a tape reel, a tape head elevating mechanism, a tape adsorbing plate, and a tape cutter provided on the lateral movement base.

As described above, the mother mold tape adhering apparatus of the present invention is configured so that two separately formed mother molds having a predetermined lens diameter and a curvature are molded into the mold guides of both outer rotating cylinder portions of the cylindrical divided mold holder. A set that engages and engages with a claw from an exposure window; a receiving roller body that stands and mounts the mold holder; an adsorption body that is disposed opposite to both sides of the mold holder; a moving-side adsorption unit with a support bar; and a fixed-side adsorption unit , The holder pulling mechanism with the retraction of the moving side suction unit and the return distance of the moving side suction unit (secondary) (Moving) is set to a value obtained by pulsing the primary movement amount of the suction unit and the predetermined material filling gap amount, and the tape reels and tapes are arranged above the outer peripheral surfaces of both molds waiting at a predetermined position. Since the adhesive tape that is fed out in conjunction with the tape attaching means such as the tape lifting mechanism, tape adsorbing plate, tape cutter, etc., is automatically attached, the two mold molds are securely inserted into the predetermined gap (of the plastic material). Assembled in the filling gap).

That is, a pair of master molds are fitted on both sides of the mold holder and held parallel by claw engagement with movable claws, and the holder is erected on the receiving roller body at the middle of the machine body, and then placed on both sides of the machine body. Among the moving side and fixed side suction units, at least the moving side suction unit is appropriately moved (primary movement) by an electric slider driven by a pulse motor, and the mold holder is held by the suction body of the suction unit and several supporting shafts in the periphery. It abuts on the mold surface exposed to the central exposure window and is transferred by suction. At this time, the other (opposite side) master mold is similarly attracted and transferred by the adsorbent and the support shaft of the fixed-side adsorption unit.

In this case, the movement-side suction unit is stopped at a position where the fixed-side suction unit on the opposite side of the mold holder moves backward by a certain amount against the spring in conjunction with the pressing. Both mother molds in the mold holder are temporarily held by being held by the adsorbents and support shafts of both the moving side suction unit and the stationary side suction unit. In addition, since the periphery of the mold surface is received by a support shaft that can be retracted by at least three elastic members, the support shaft can be appropriately buffered even if the adsorption position of the adsorbent at the center is shifted. Center correction (centering out) is performed.

Thereafter, the claw engagement between the two mold dies temporarily held in parallel with the mold holder is released on the receiving roller body in the mold holder of the three-divided configuration, both the outer rotating cylinder part and the core holding If you move the claws that protrude from the outer periphery of the body part so as to sandwich each other, the movable claws attached to the side surfaces of the core holding body will twist against the spring of the support shaft. The engagement end is swaying outward, and the engagement end of the movable claw is separated from the periphery of the mother mold, so that the claw engagement is released.
At this time, the master mold itself is already held on the suction unit side.

Here, if the moving-side suction unit is retracted, the mother mold held by the suction unit is pulled out of the exposure window of the mold holder, so-called holder removal. Note that the base mold of the fixed side suction unit is held on the side of the suction unit and is returned to the standby roller body at the initial position by the spring of the rear end.

That is, both molds are held and opposed to the moving side suction unit and the stationary side suction unit, respectively. However, the mold holder itself remains on the receiving roller body. It can be removed manually).

Here, in order to move the moving side suction unit again to the receiving roller body side to form a desired filling gap in both mold dies, the secondary movement amount of the moving side suction unit is set to the primary movement amount of the suction unit. If this pulse value is given to the electric slider via a known input means provided outside the machine body, the pulse value is changed according to this pulse value. Since the motor is driven and the moving side adsorption unit moves by a distance corresponding to the pulse value, the moving side adsorption unit stops at a predetermined position at the upper part of the intermediate part of the machine body (upper part of the receiving roller body). At this time, the facing interval between the master mold of the moving side suction unit and the master mold of the fixed side suction unit is the desired filling gap for the plastic material, and is in a standby state standing in parallel.

The two mold dies that have reached the intermediate part of the machine body do not contact the receiving roller body at the outer diameter position of the removed mold holder, and are then received by a separate tape presser / receiving roller that rises from below the receiving roller. It is free to roll.

On the other hand, when both molds face the machine body middle position again, the tape adhering means, which is a tape feeding unit waiting on the lateral part directly above and linked separately due to this pulse value, moves appropriately and moves upward. Reach backwards.

After that, the tape head part of the tape adhering means operates the tape head lifting mechanism at the rear, the tape adsorbing plate on the tip side rotates downward, and the adhering roll reaches the circumferential surface of both mother molds, Furthermore, the end of the adhesive tape led out from the tape reel is guided to the tip of the tape adsorbing plate, and pasted from both ends of the sticking roller to both molds.

Here, since the rotating drum portion at the center of the suction unit also rotates in conjunction with the feeding of the tape, both the mother molds held by rotating and holding the suction member and the support shaft provided on the rotating drum portion roll, The tape is automatically attached to both circumferential surfaces of both molds. However, since the tape pressing and receiving roller is located on the lower surface of the both molds to which the adhesive tape is attached, the wound adhesive tape is appropriately pressed and the winding end is not peeled off. The pressure-sensitive adhesive tape that has been attached to the matrix mold once is cut by a tape cutter that is fed to the front surface of the tape suction plate portion. At this time, a filling gap for the lens material is formed between the both molds.

In this way, when the tape winding of the adhesive tape is completed and the both molds are integrated, the rotation of the rotating body and the tape feeding mechanism of the tape attaching means are stopped. In other words, the tape can be mechanically wound around both the mother molds with a predetermined interval.

After that, if the suction body that directly holds the two molds is released and the moving side suction unit is retracted (the fixed side suction unit may be in the standby position), the tape presser / receiving roller is wound around the outer periphery with tape. Then, a master mold having a filling gap for the lens material inside (intermediate) is obtained.

A mold mold tape adhering device for molding a plastic lens according to the present invention includes a cylindrical divided mold holder that fits two pairs of mold molds, engages the peripheral portions with claws, and temporarily holds them in parallel upright, and the mold holder The receiving roller body that stands up and the moving side facing the both sides of the mold holder, the adsorbing body of the fixed side adsorbing unit and the centering and supporting shaft are adsorbed to the mold guide and exposure window of the mold holder to the exposed mold surface of the mold Holding and holding the mold holder as the suction unit retreats and returning the secondary movement to the standby position of the suction unit is converted into the number of pulses of the primary movement amount of the suction unit and the filling gap amount between the two mother molds. From the tape sticking means that mechanically moves with the sum of the two to obtain a reliable filling gap and that faces the outer peripheral edges of both molds at the standby position in an upwardly linked manner For attaching an adhesive tape, it is a rose with no tape wound.

In this case, the fitting set of the two mother molds to the cylindrical split mold holder is
Since the mold guide and exposure window of both outer rotating cylinders in the three-part configuration has a diameter equal to or slightly larger than the mold diameter, the core holding cylinder between the outer rotating cylinders can be simply inserted. The mold edge is automatically nail-engaged by swinging the movable claw with a spring arranged on the side of the part. That is, one-touch temporary holding can be performed.

In addition, the final setting of the plastic material filling gap between the two temporarily held master molds is that of the moving-side suction unit that is temporarily retracted in the holder removal process in the moving-side and fixed-side suction units facing both sides of the mold holder. The re-transmission amount is a mechanical movement using an electric slider driven by a pulse motor to ensure a reliable feed (secondary movement). That is, the mold holders for removing the holders of both mold molds temporarily held in the mold holder are separated and rotated from each other to disengage the claws, and then the moving side suction unit is moved backward as appropriate to move both mold molds. The amount of re-transmission (secondary movement) to the specified position of the suction unit after the holder mold is removed once, and the total number of movement pulses of the primary movement of the suction unit and the number of pulses of the desired filling gap (actual thickness measurement value) By setting the pulse value to the input pulse of the electric slider, the interval between the two mold molds facing each other (filling gap of the plastic material) is accurately determined.

That is, since the moving side suction unit is fed by a pulse motor, microstep driving can be performed and predetermined positioning control can be performed. This is suitable for forming a lens mold with high accuracy for obtaining a lens thickness having a different lens degree each time, such as a spectacle lens.

In addition, in order to adopt a structure in which at least three support shafts that protrude slightly from the adsorbent body are arranged in the periphery of the adsorbent body for temporarily holding the mother mold, and the support shaft itself can freely move by spring pressure. The mold can be held and centered with respect to the inner surface of the mold, and when the setting is completed, the chuck mechanism at the end of the shaft works and can be held securely.

In addition, the adhesive mold that is properly fed from the upper tape adhering means is used in order to cause the parallel standing upright mold molds returned to the predetermined position to roll on the tape pressing and receiving roller and to rotate with the rotation of the suction unit side rotating body. The tape can be mechanically attached to the outer peripheral surface of both molds. That is, since the tape is wound while maintaining a predetermined parallel state without requiring skill, there is an effect such as obtaining an accurate master mold having no variation in the filling gap.

Hereinafter, an example of a base mold tape sticking device for molding a plastic lens according to the present invention will be described with reference to the drawings.

FIG. 1 to FIG. 9 show a mother mold tape sticking device in which the right side is the moving side suction unit and the left side is the fixed side suction unit among the suction units arranged on both sides of the machine body. This is a device main body in which a receiving roller body 2 having a roller configuration is disposed laterally, and a moving-side suction unit 3 and a fixed-side suction unit 4 are disposed opposite to both sides 1b and 1c of the machine body that are located on both sides of the receiving roller body 2. In this case, a table portion 5 that moves in the longitudinal direction of the machine body is provided below the moving-side suction unit 3, and an electric slider 7 that is a known ball screw drive system that is driven by a pulse motor 6 is attached to the table portion 5. It has been. The opposite fixed side adsorption unit 4 is configured to be placed on a table portion 5 ′ which slides in the longitudinal direction of the machine body provided at the lower part. However, a spring 8 is mounted on the rear end of the table portion 5 'for buffering backward. In addition, the configurations of both the moving side suction unit 3 and the fixed side suction unit 4 include a pad type adsorbing body 9 connected to a suction pipe portion 9a connected to a compressor (not shown) at the center position on each facing surface side, A rotating body 11 having at least three retractable centering and supporting shafts 10 provided at the periphery is provided. Further, the centering and supporting shaft 10 is provided with a buffer spring 12 at the base,
In addition, a known cylinder type chuck mechanism 13 is attached to the end of the shaft and the set is held securely. 1
Reference numeral 4 denotes a bearing portion interposed between the unit base portion 3 a and the rotating body portion 11.

Reference numeral 15 denotes a tape adhering means which moves laterally with respect to the longitudinal direction of the machine body disposed above the receiving roller body 2, and the configuration of the tape adhering means 15 is disposed on an upright substrate 16 having a configuration orthogonal to the longitudinal direction of the machine body. A tape head 17 is provided with a tape head elevating mechanism 18 at the rear end thereof, and a tape adsorbing plate 20 that rotates the adhering roll 19 up and down at the lower end of the tape head elevating mechanism 18. It is a unit structure which has the tape cutter 21 provided side by side.

Reference numeral 22 denotes a cylindrical divided mold holder for temporary holding of the mold that is erected on the receiving roller body 2 of the machine body intermediate portion 1a. The mold holder 22 is composed of left and right outer rotating cylinder portions 24 and In a three-part configuration with a core holding barrel 25 that fits in the middle, the outer rotating cylinder 24 has a mold guide / exposing window 23 having a diameter that is the same as or slightly larger than the mold diameter on one side.
The mold holding movable claws 26 having at least three pivot shaft portions 26a and springs 26b mounted on the pivot shaft portions 26a are provided on both side cylinder end surfaces of the core holding body 25. . In addition, the three-part outer rotation cylinders 24 and 24 and the core holding body 25 are structured to rotate relative to each other by pulling the knobs 27a and 27b projecting from the outer periphery thereof. Reference numerals 28 and 28 denote lens molds having a predetermined diameter and a len curve for molding plastic lenses.

The set position of several movable claws 26 (three in the figure) attached to the pivot portion 26a of the cylindrical end surface of the core holding body 25 is such that the hook-shaped engagement end 26c at the tip is 3 As the outer shell cylinder 24 and the core holding body 25 of the split configuration rotate relative to each other, the arm 26 swings against the support of the spring 26b, and the mold guide and exposure window 23 of the outer shell cylinder 24 is rotated. Since the inner mold 28 is displaced (retracted) from the diameter, the base mold 28 can be fitted and inserted, and the engagement end of the movable claw 26 can be found in the return rotation of the outer rotation cylinder 24 and the core holding body 25. A so-called claw engagement is achieved in which 26c faces within the diameter of the mold guide / exposure window 23 and locks the mold edge 28a of the mother mold 28. In other words, the operation of the movable claw 26 is shifted inward or outward of the cylinder diameter of the outer rotation cylinder portion 24 due to the mutual rotation of the outer rotation cylinder portion 24 and the core holding body portion 25. That is, the movable claw 26 moves by causing one end of a spring 26b attached to the pivot portion 26a to the tip of the movable claw 26 due to the spring torsion (see FIGS. 8 and 9).

Now, this operation will be described. As a tape attaching operation to the pair of lens mother molds 28, first, both the mother molds 28 and 28 are placed on both sides of the cylindrical divided mold holder 22 with the outer rotating cylinder part. The mold guide / exposure window 24 is fitted with a claw engagement. In this case, the mold holder 22 having a three-part configuration has the tabs 27a,
If it is drawn and inter-rotated so as to sandwich 27b, the engaging end 26c of the movable claw 26 protruding from the inner diameter portion of the mold guide / exposed window 23 of the outer rotating cylinder portion 24 becomes the mold guide / exposed window 2 described above.
3 is retracted from the inner diameter of 3 (movable outward), so that the mother mold 28 can be inserted and fitted. Thereafter, when the rotation of the outer rotating cylinder portion 24 and the core holding body portion 25 is returned, the engaging end 26c of the movable claw 26 comes out of the inner diameter of the mold guide / exposing window 23 and contacts the mold edge 28a. Become engaged (
(See FIGS. 8 and 9). However, the nail engagement of the mold edge portion 28a is not observed at the single-sided position of the core holding barrel 25 at the stage where the master mold 28 is simply placed in the outer cylinder portion 24.

That is, knobs 27a projecting from the outer circumferences of the outer rotating cylinder portion 24 and the core holding barrel portion 25 on one side,
If the rotation is performed so as to sandwich the 27b between each other, it rotates against the spring of the tension spring 29 spanned between the outer rotation cylinder part 24 and the core holding body part 25. When the core holding body 25 rotates, the three movable claws 26 arranged on the same side face are spread outwardly against the support spring 26b, and the mother facing one side of the core holding body 25 The peripheral portion of the mold 28 is the engagement end 26 of the movable claw 26.
The mold edge portion 28a is clamped (claw-engaged) by the engaging end 26c serving as a holding convex portion and temporarily held (see FIGS. 9 and 11). On the other hand, the master mold 28 facing the outer shell cylinder 24 on the opposite side also enters from the mold guide and exposure window 23 and is engaged by the movable claw 26. The peripheral portions of the mother molds 28, 28 that enter the mold holder 22 are arranged on the outer rotating cylinder portions 24.
And it fits naturally in the holder fitting groove 22a formed in the core holding body 25 and becomes parallel upright.

In this way, the mold holder 22 in which the two master molds 28 and 28 are temporarily held at both side positions is placed upright on the receiving roller body 2 disposed in the machine body intermediate portion 1a of the apparatus main body 1.

Here, of the left and right suction units 3 and 4 positioned on the axis of the mold holder 22 placed on the receiving roller body 2 of the machine body intermediate portion 1a, the moving touch panel 3 is disposed on, for example, one side of the machine body. 30 is appropriately operated, and the table portion 5 is moved forward to move to the mold holder 22 side by driving of the electric slider 7 disposed below the moving side suction unit 3. At this time, the adsorbent 9 on the front surface of the adsorbing unit and the supporting shaft 10 in the peripheral portion enter the exposed window 23 of the mold holder 22 and come into contact with the surface of the master mold 28 (exposed surface) temporarily held therein to perform adsorption and pressing action. Shifted to work support. This movement of the suction unit 3 is referred to as a primary movement.

First, when the moving side suction unit 3 reaches the mold holder 22, the three support shafts 10 at the foremost position enter the exposure window 23 and press the peripheral portion of the mother mold 28 temporarily supported. The three support shafts 10 are elastically pressed by a spring 12 attached to the base and are pressed and buffered, so that an arc-shaped mother mold 28 can be centered and set (the mother mold 28 is slightly inclined). Even if temporarily held, the position is corrected and so-called centering is possible). When the setting is completed, the support shaft 10 is fixed by the end chuck mechanism 13. Thereafter, negative pressure air flowing through a known suction distributor 41 is applied to the adsorbent body 9, and a suction action is caused by the abutment of the adsorbent body 9 to adsorb and hold the mother mold 28. The mother mold 28 is held together with the elastic support of the support shaft 10 and the adsorption of the adsorbing body 9 (the mother mold 28 moves to the adsorption unit 3 side).

Further, the movement stop of the moving side suction unit 3 itself is detected when the fixed side suction unit 4 on the opposite side that receives the interlocking pressure via the mold holder 22 moves backward by a certain amount against the spring 8. Z)) stops the electric slider 7 for movement. Of course, the moving-side suction unit 3 and the fixed-side suction unit 4 are arranged to face each other on the coaxial line via the mold holder 22 set on the receiving roller body 2.

Under this condition (after the mother molds 28 and 28 are adsorbed on the both adsorbing units 3 and 4 side),
The outer rotary cylinder 24 on one side of the mold holder 22, the core holding body 25, and the core holding body 2
5 and the outer shell tube portion 24 on the other side are pulled together so that the protruding knobs 27a, 27b and 27a, 27b are picked from each other, the outer tube portion 24, the core holding barrel 25, and the inner Child holding body 2
5 and the outer rotating cylinder portion 24 are mutually rotated, and at this time, several movable claws 26 are also displaced in the outer circumferential direction against the spring pressure, and the engaging end 26c is engaged with the escape claw from the mold edge portion 28a. Is released and released. At this stage, the mother mold 28 is moved to the suction unit 3 (4) side.

Here, if the moving side suction unit 3 is moved backward by the reverse movement of the electric slider 7, at least one of the mother molds 28 comes out of the mold holder 22 and the other mother mold 2 is removed.
8 is also supported and transferred to the fixed-side suction unit 4 and the substantial holder holding is released. For this reason, it is sufficient to remove the mold holder 22 remaining on the receiving roller body 2 by an appropriate means such as manual work, and this means becomes a kind of holder removing mechanism.

The stationary suction unit 4 side returns to the original set position and waits due to the spring of the spring 8 arranged at the rear end. The pair of mother molds 28, 28 are moved to the moving side suction unit 3 and the stationary side suction unit 4, respectively, and are in a parallel upright state.

Thereafter, the mother mold 28 of the moving side suction unit 3 is moved back to the machine body intermediate portion 1a again to obtain a desired filling gap a with the mother mold 28 of the fixed side suction unit 4. That is, the moving side adsorption unit 3 performs secondary movement. The setting of the movement amount of the secondary movement is performed by setting the pulse value of the movement amount (primary movement amount) of the moving side suction unit 3 and the total pulse value of the pulse value of the desired filling gap a between the mold dies 28 and 28. Is an input pulse of the pulse motor 6 of the electric slider 7 (this operation may be performed, for example, while confirming the pulse value displayed on the touch panel 30 arranged on one side of the machine body). Therefore, if the electric slider 7 is moved by a predetermined distance and stopped, a desired filling gap a between the molds 28 and 28 located in the moving side suction unit 3 and the fixed side suction unit 4 is mechanically obtained.

The outer diameter of the mother molds 28 and 28 moved to the machine body intermediate portion 1a is the mold holder 2.
Since the outer diameter of the mold 28 is smaller than the outer diameter of 2, the lower surface of the master mold 28 is in a standby position in a hollow position not in contact with the receiving roller body 2, so that it is separately provided below the two rollers of the receiving roller body 2. The tape presser / receiving roller 31 is lifted by the operation of the tape presser cylinder 32, and the master mold 2
8 and 28 should be in direct contact.

Thus, after the master molds 28, 28 return to the position of the original machine body intermediate part 1a, the tape adhering means 15 which is a tape unit located at the back side of the fixed suction unit arranged in the machine body upper part 1d is First, the pedestal 15a is slid along the guide rail 1e of the apparatus body 1 by the operation of the lateral movement cylinder 33 and moved laterally to the intermediate part of the machine body. At this time, the tape head elevating mechanism 18 is pulled by the operation of the vertical cylinder 34, and the tape head frame portion 35 is lowered forward with the support shaft 35a as a fulcrum through an appropriate link mechanism. The built-in tape suction plate 20 is also rotated forward and downward by the operation of the moving cylinder 36 disposed at the rear end, and the sticking roll 19 at the front end is brought close to the outer peripheral surfaces of the mother molds 28 and 28. The adhesive tape A fed out from the tape reel 17 is guided to the sticking roll 19 through the guide pulley 37 and the like,
The front end of the adhesive tape A is in contact with and adhered to the outer peripheral surfaces of the lower mother molds 28 and 28.

Further, at this time, the rotary body portions 11, 11 themselves of the adsorption units 3, 4 are also interlocked due to the input of the pulse value, and the transmission means 39 such as a timing belt is driven by driving the sticking rotation pulse motor 38. Since the master molds 28 and 28 supported by the adsorbing bodies 9 and 9 and the support shafts 10 and 10 integral with the rotary body parts 11 and 11 are also rotated, the fed adhesive tape A is molded. Sequential sticking is done while touching the outer peripheral surface. At this time, since the tape pressing and receiving roller 31 comes into contact with the lower surfaces of the master molds 28 and 28 and rolls, the end of the adhesive tape A is pressed by the receiving roller 31 and the tape is not peeled off.

Further, when the adhesive tape A is wound around the entire circumference of the mother mold 28, the tape cut cylinder 40 is actuated to rotate the tape cutter 21 forward with the support shaft 21b as a fulcrum, and the cutter blade 21a is attached to the adhesive tape A. Make contact and cut. Here, the mother mold 28
, 28 is completed, and the two master molds 28, 28 are completed.
A predetermined filling gap 42 for lens material is formed therebetween.

In this way, the lens material filling gap 42 is arranged in the middle, and the adhesive mold A is wound to form a single plastic molding mold 28 'in which the molds 28, 28 are integrated. This plastic mold die 28 'is sent to a separate plastic filling step.

The lens material filling operation into the actual plastic molding die 28 'is performed, for example, by slightly removing the adhesive tape A straddling the mother die 28, 28 and providing a filling port.

The lens thickness is set to a small diameter in order to adopt a mechanical determination method in which the distance between the two mold molds is temporarily shifted to both suction units and the transfer amount of the suction units that are fed out again is based on a predetermined pulse value. The present invention can be applied not only to a spectacle lens having a configuration but also to a mother mold used for binoculars, a telescope, various other large-diameter plastic lenses, and the like.

It is a front view of the principal part which shows the Example of the mother mold mold tape sticking apparatus for plastic lens shaping | molding of this invention. It is a side view of the principal part. It is explanatory drawing which makes the tape adsorption | suction board part of the tape sticking means incline, and adjoins a mother mold. It is a front view of the principal part of the adsorption unit part. It is explanatory drawing which shows the inside of a movement side adsorption | suction unit. It is a perspective view of the same electric slider. It is a perspective view which shows the principal part of an adsorption | suction unit and a cylindrical split mold holder. It is a front view which shows the principal part of a cylindrical division type mold holder. FIG. 5 is an explanatory view of fitting the mother mold from the mold guide and exposure window side of the outer rotating cylinder by reciprocally rotating the outer rotating cylinder portion and the core holding barrel portion in the mold holder to retract the movable claw. It is explanatory drawing which stood up and faced two mother molds. It is explanatory drawing which fitted two mother molds between the outer periphery rotation cylinder part of the mold holder both sides, and an inner core holding | maintenance trunk | drum. It is the figure which affixes the adhesive tape to both the outer peripheral surfaces of the two standing molds, (A) is an explanatory diagram of the beginning of winding of the adhesive tape, (B) is wrapped with the adhesive tape and filled inside with a predetermined plastic material It is explanatory drawing of the mother mold which formed the gap | interval.

Explanation of symbols

1 Main unit
1a Aircraft middle part
1b, 1c Aircraft sides
2 Receiving roller body
3 Moving side adsorption unit
4 Fixed side adsorption unit
6 Pulse motor
7 Electric slider
9 Adsorbent
10 Centering and support shaft
12 Spring for collision
13 Chuck mechanism
15 Tape sticking means
18 Tape head lifting mechanism
19 Sticking roll
21 Tape cutter
22 Mold holder
A adhesive tape

Claims (5)

A cylindrical split mold holder for temporary holding, in which two lens mother molds are fitted on both sides, and the peripheral portions are engaged and held with movable claws to expose the outer surface of the mold, and the middle part of the machine body is installed. A receiving roller body for standingly mounting the mold holder, and a pad-type adsorbing body for sucking the center of the outer surface of the one mold base on both sides of the machine body located on the axis of the mold holder on the receiving roller body and its periphery A moving-side adsorption unit that moves in the axial direction provided with a rotating body part that places several reversible centering and supporting shafts that press the part, and a pad-type adsorbent that sucks the center of the outer surface of the other mother mold And a fixed-side suction unit provided with a rotating body part for arranging a plurality of retractable centering and supporting shafts for pressing the periphery thereof, and above the receiving roller body, both mother molds A tape adhering means for adhering the peripheral surface to the tape and closing the opposing gap is arranged, and both the mold mold outer exposed surfaces in the mold holder facing the receiving roller body are in contact with the moving side adsorption unit by the primary movement and the fixed side. Both mold molds held by the suction unit and the support shaft of the suction unit and disengaged from the claw of the movable claw due to the mutual misalignment of the mold holder are guided out of the holder by retreating the moving side suction unit. The secondary removal distance for re-transferring the holder removal mechanism and the moving side suction unit to the stationary side suction unit where the other mold mold remains is a value that takes into account the primary movement amount and the desired gap between the two mold molds. It is equipped with a filling interval adjustment mechanism to be set, and only the two mold molds facing the predetermined interval at the intermediate part of the machine body by the secondary movement of the moving side adsorption unit, the tape presser and receiving roller and both adsorptions that contact from below Along with the rotation of the knit-side rotating body, the adhesive tape fed from the tape adhering means facing the position directly above is adhered to the outer peripheral surfaces of both mother molds to form a filling gap for the lens material inside. A mother mold tape attaching device for molding a plastic lens. The cylindrical split mold holder has a three-part holder configuration of an outer rotating cylinder portion with left and right mold guides / exposed windows and a core holding barrel portion fitted in the middle, and both outer rotating cylinder portions and the core holding barrel. With the mutual rotation of the tabs protruding from the outer peripheral parts of the part, the mold mold peripheral edge part that enters from the mold guide and exposure window is nail-engaged by the movement of the movable claws with springs provided on both side surfaces of the core holding body part. 2. A mold tape attaching device for molding a plastic lens according to claim 1. 2. The mold lens tape adhering device for molding a plastic lens according to claim 1, wherein the centering and supporting shaft is a retractable supporting shaft having a spring mounted on the base and a chuck mechanism at the end. 2. The base mold tape adhering device for molding a plastic lens according to claim 1, wherein both the adsorption units comprise a moving side adsorption unit having an electric slider driven by a pulse motor and a fixed side adsorption unit receiving only a spring buffer. 2. The base mold tape adhering device for molding a plastic lens according to claim 1, wherein the tape adhering means comprises a combination of a tape reel, a tape head elevating mechanism, a tape adsorbing plate and a tape cutter provided on the laterally movable pedestal.

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