JPS62297119A - Molding tool of contact lens - Google Patents

Abstract

PURPOSE:To remarkably easily manufacture a contact lens having an excellent quality in a short period of time by a method wherein a male and a female molding members are combined with each other through a spacer along their major axes. CONSTITUTION:A male molding member 4 and a female molding member 8 are combined through a spacer 9 between them along their major axes with each other so as to generate a gap cut off from the outside. When the molding members 4 and 8 perfectly contact through the spacer 9 with each other, a certain volume of polymeric composition liquid is filled in the gap. The molding tool is heated in a constant temperature bath in accordance with the predetermined temperature raising program. Since the volume of the polymeric composition liquid decreases due to the shrinkage on polymerization and the liquid exhibits adhesion to a first optical molding surface 1 and a second optical molding surface 5, a force acts in the direction so as to draw near both the optical surfaces. Since the spacer 9 is fully flexible in the above- mentioned polymerization process, the thickness of the spacer 9 decreases as both the molding members draw near to each other, resulting in absorbing the shrinkage on polymerization in the direction of the thickness of a lens. Consequently, a contact lens without defects such as sinkmark, flash and the like can be remarkably easily manufactured with no machining at all.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a mold used when manufacturing contact lenses by a cast polymerization method.

[Prior Art] Conventionally, contact lenses have been mainly manufactured by subjecting a material made of a polymeric composition that has desired physical properties to mechanical processing such as cutting and polishing (hereinafter referred to as the cutting and polishing method). With the cutting and polishing method, a contact lens having relatively good optical properties can be obtained, and the shape of the contact lens can also be designed as required.

Further, as another method for manufacturing contact lenses, there is a method called a spin casting method in which a polymerizable liquid is solidified on a rotating mold to obtain contact lenses. The spin-casting method carefully controls a number of factors such as the viscosity of the polymeric liquid, surface tension, shape of the stone and mold, rotation speed, and surface condition, etc. to form the desired contact lens, and compared to the cutting and polishing method, This method is intended to improve productivity and is advantageous for manufacturing thin contact lenses.

Furthermore, a cast polymerization method is known as a method for manufacturing contact lenses. This method is a manufacturing method in which a polymerizable liquid is polymerized and solidified in a mold having a predetermined optical surface to form a contact lens shape, and has the advantage of high productivity and little variation in quality.

[Problems to be solved by the invention] However, as is well known, the cutting and polishing method is a method in which each lens is cut out from a material one by one and finished by polishing, which inevitably requires a large number of manufacturing steps. Not only this, but also requires advanced machining techniques by skilled workers, resulting in a problem of poor productivity.

Furthermore, in the cutting and polishing method, the first condition is that the material is hard and can be machined, so even if the material has excellent physical properties, if there are problems with machinability or polishability, It had the disadvantage that it could not be made into contact lenses.

On the other hand, the spin-casting method requires highly sophisticated technology as it requires strict control of a large number of factors as described above, and the materials that can be used are also limited to specific materials. In addition, the concave surface of contact lenses obtained by the spin-casting method is an aspherical surface with a parabolic shape, and a true optical surface cannot be obtained, and the base curve, which is one of the important parameters of contact lenses, cannot be obtained. It has the disadvantage that it is difficult to set it arbitrarily. Additionally, lenses obtained by spin-casting usually have the disadvantage of requiring final finishing around the lens after polymerization.

The cast polymerization method is effective as a means to solve the above-mentioned problems in the cutting and polishing method and the spin casting method.

However, the cast polymerization method includes the problem of volumetric shrinkage called polymerization shrinkage that occurs when a polymerizable liquid is polymerized and solidified. The volume shrinkage due to polymerization shrinkage of many nsm bodies is 12
% to 22%, and this shrinkage is typical for contact lenses made from vinyl monomers such as acrylic esters, methacrylic esters, vinyl pyrrolidone, substituted or unsubstituted acrylamide, and methacrylamide, which are commonly used in contact lenses. This was a major obstacle to the type polymerization method. In other words, when a contact lens is cast in a sealed mold, voids called sink marks may occur on the surface of the lens due to polymerization shrinkage, or cavities called voids may be formed inside the lens, making it difficult to use the cast product as a contact lens. make it inappropriate.

In order to solve these problems with cast polymerization, various methods have been proposed so far. For example, JP-A-52-117
According to the method disclosed in Japanese Patent No. 647, a flexible rim part is integrally disposed on one side of a set of molds, and polymerization shrinkage is absorbed by the curvature of the flexible rim part and the resulting reduction in wall thickness. do. However, such flexible rim parts need to be thin in order to have 1q of curvature sufficient to absorb polymerization shrinkage, and the tip must be sharpened to about 0.04111/III to 0.01 m/m. This poses a problem in handling, as it can be easily damaged even by slight contact. In addition, since the above-mentioned flexible rim parts directly form the outer periphery of the contact lens during cast polymerization, the design around the lens is limited to the shape obtained by the curvature of the rim, making it impossible to design freely. It had some problems. Furthermore, since the flexible rim component must be integrated with the mold, the material that can be used for the mold is inevitably limited to plastic, which poses a major restriction in selecting the material for the mold. Furthermore, the material is limited to materials that do not dissolve or change in quality in the polymer composition solution used. Furthermore, the flexibility of the rim necessarily limits the hardness and heat resistance of the material that can be used as a mold, so deformation occurs during polymerization that requires heating, resulting in insufficient optical performance. The problem was that it was not possible to obtain accurate accuracy.

Further, according to the method disclosed in, for example, Japanese Patent Laid-Open No. 54-43268, a soft contact lens in a swollen state can be manufactured by polymerizing and solidifying a polymerizable liquid together with a solvent in a mold. However, since this method is an application of a polymerization method using a solvent (solution polymerization method) to the production of soft contact lenses, it cannot be applied to cast polymerization of non-aqueous hard contact lenses.

The present invention was made for the purpose of solving the problems in the method for manufacturing contact lenses as described above, and more specifically, it solves the problems in the method for manufacturing contact lenses by cast polymerization, and provides a method for producing contact lenses of excellent quality. The purpose was to manufacture contact lenses extremely easily and in a short period of time.

Means for Solving Problem E] In order to achieve the above object, the present invention provides a structure in which the outer periphery of the molding part between the male molding member and the female molding member is common to the main axis of both molding members. A ring-shaped spacer is installed to form a contact lens mold.

Hereinafter, the configuration of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an explanatory diagram for explaining the present invention in detail,
FIG. 2 is a cross-sectional view showing the combined state of the contact lens mold according to the present invention.

The present invention comprises a first molding part 2 having a main axis for assembly in the vertical direction and including a first optical molding surface 1 for forming a first surface of a contact lens; a male molding element 4 having a contact 3 with a spacer 9 in an independent position; and a second optical molding having a common principal axis with the male molding element 4 and for forming the second surface of the contact lens. a second molding part 6 encompassing the surface 5; and a female molding member 8 having a contact part 7 with the spacer 9 at a position independent of the second molding part 6; It is composed of a spacer "-9" and a liquid reservoir 6a provided in a slope shape around the insertion part of the molded member 4 of m.This liquid reservoir 6a can store excess polymer composition, and Even if the filler is not accurately injected into the mold, the polymeric composition solution will not come into contact with the spacer and adhere to it or attack the spacer.

As the material for the male molding member 4 and the female molding member 8 presented in the present invention, materials commonly used as mold materials, such as glass, metal, ceramic, and plastic, can be used.

In particular, when selecting a thermoplastic as a mold material, it is important to select a material with a heat deformation temperature 20 to 40°C higher than the polymerization temperature. Alternatively, by applying a normal plastic molding method such as a compression molding method, it has the advantage that a molded member with high precision can be manufactured with extremely high productivity. Examples of such thermoplastics include high density polyethylene, polypropylene, polytetrafluoroethylene, polychlorotrifluoroethylene, polyolefin copolymers, polyacetals, polyphenylene oxides, polysulfones, polyamides, and the like.

Further, as the material of the spanner proposed in the present invention, thermoplastic plastics or rubber elastic bodies having good flexibility near the polymerization temperature can be used. Examples of such materials include low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, soft vinyl chloride, ionomer resin, urethane rubber, natural rubber, isoprene rubber, butadiene rubber,
Examples include styrene-butadiene rubber, chloroprene rubber, nitrile rubber, silicone rubber, and acrylic rubber. These materials are used after being molded into a predetermined shape by a normal molding method.

The first optical molding surface 1 of the male molding member 4 and the second optical molding surface 5 of the female molding member 8 shown in the present invention are combined to form a meniscus-shaped contact lens, so that the first optical molding surface 1 When the shaping surface 1 is substantially convex, the second optical shaping surface 5 must be substantially concave, and when the first optical shaping surface 1 is substantially concave, the second optical shaping surface 5 must be substantially concave. The molding surface 5 must be substantially convex, but any combination is within the scope of the invention.

Further, the first optical molding surface 1 and the second optical molding surface 5 of the mm molding member 4.8 according to the present invention can be fully adapted to a contact lens designed by a combination of spherical surfaces, but if necessary, one or the other can be used. Alternatively, the present invention is not limited in any way to a design in which both surfaces are made of aspherical surfaces.

Furthermore, the mold of the present invention does not preclude use by applying a load on the combined mold as the case requires.

[Function 1] In the contact lens mold according to the present invention, the male molding member 4 and the female molding member 8 are assembled along the main axis with a spacer 9 interposed between them.
The first molding part 2 of the female molding member 8 and the second molding part 6 of the female molding member 8 form a vertically movable fitting structure, creating a gap for contact lens molding that is shielded from the outside. When the inner molding member 4.8 is in complete contact via the spacer 9, this gap provides a volume corresponding to the predetermined shape of the contact lens.

The polymeric composition liquid that will be polymerized and solidified to form a contact lens is prepared in an amount slightly larger than the volume of the contact lens to be molded into the second molding part 6 of the female molding member 8, as well as to account for polymerization shrinkage m and overflow stones. However, it is dripped. Thereafter, the spacer 9 is placed on the spacer contacting part of the second molded member, and the male molded member 4 is placed on the female molded member 8 along the main axis and moved downward. At this time, the excess polymer composition liquid is gradually removed from the molding space as the male molding member 4 moves, and is held by the liquid reservoir 6a so as not to contact the spacer 9. When the inner molding member 4.8 is completely contacted via the spacer 9, a certain volume of the polymeric composition liquid fills the void for contact lens molding.

At this time, the void for contact lens molding filled with the polymeric composition liquid is formed between the first molding part 2 and the second molding part 2 as described above.
It is isolated from the outside by the molding part 6, and there is no contact between the polymerizable liquid and air. By heating the mold filled with the polymerizable liquid in this manner in a constant temperature bath according to a predetermined temperature increase program, a desired contact lens can finally be formed.

When the polymerization composition liquid starts polymerization in the heating process, its volume decreases due to polymerization contraction, and at this time, the polymerization composition liquid is exposed to the first optical molding surface 1 and the second optical molding surface 5.
As a result, a force is exerted in a direction that causes both optical surfaces to approach each other. The spacer 9 according to the present invention exhibits sufficient flexibility during the polymerization process to reduce its thickness as the inner molding member 4.8 approaches, absorbing polymerization shrinkage in the direction of the lens thickness.

Incidentally, examples of the polymerization composition liquid used here include the following. Methyl immethacrylate, ethyl methacrylate, methacrylic 1ln-butyl, methacrylic 1liso-butyl, methacrylic 1ltert, -butyl, methacrylic IIQn
-Propyl, methacrylic 1liJis.

- Hydrophobic methacrylic acid substituted monomers such as propyl, lauryl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, methylbenzyl methacrylate, inbornyl methacrylate, etc. 〇0 Methyl acrylate, ethyl acrylate, acrylic'P
Hydrophobic acrylic acid substituted monomers such as lin-butyl, 1so-butyl acrylate, 1ltert, -butyl acrylate, 1'In-propyl acrylate, 1iso-propyl acrylate, cyclonhexyl acrylate, and benzyl acrylate.

VN methacrylic acid-substituted methacrylic acid substituted polymers having silicon such as trimethylsilyl methacrylate, trimedelsiloxanyl methacrylate, and tris-trimethylsiloxysilyl-propyl methacrylate.

Silicon-containing acrylic acid substituted monomers such as lotrimethylsilyl acrylate, trimethylsiloxanyl acrylate, and tris-trimethylsiloxanylsilyl-propyl acrylate.

(Hydrophilic methacrylic acid substituted monomers such as 112-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, glyceryl methacrylate, glycidyl methacrylate, methacrylic acid.

Hydrophilic acrylic acid-substituted monomers such as 2-human 0-xybubu acrylate, 2-hydroxypropyl acrylate, 2-human 0-xybubu acrylate, glyceryl acrylate, glycidyl acrylate, acrylic acid, etc. (t)N-methylacrylamide , N,N-dimethylacrylamide, N-methylmethacrylamide, N,N-
N-alkyl substituted acrylamide or N-alkyl substituted methacrylamide such as dimethylmethacrylamide.

Alkyl f[aN-vinylpyrrolidone, such as f'UN-vinylpyrrolidone and methyl-substituted N-vinylpyrrolidone.

υ) Ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol dimethacrylate,
Azo Examples include a liquid mixture to which an appropriate amount of a polymerization initiator such as bisisobutylnitrile, azobisdimethylvaleronitrile, benzoyl peroxide, di-tert peroxide, -butyl peroxide, and lauroyl peroxide is added.

[Example] Hereinafter, the present invention will be explained in more detail based on Examples.

Embodiment 1 FIG. 1 is a partially cutaway exploded perspective view showing an embodiment of the present invention, and FIG. 2 is a cutaway front view of the embodiment shown in FIG. In this example, the male molded member 4 and the female molded member 8 are manufactured by injection molding polypropylene, and the spacer 〇 is manufactured by injection molding a co-polymerized polyethylene-edyl acrylate. be. The first molded portion 2 of the male molded member 4 has a radius of curvature of 8. OO±0.01
a diameter a having a first optical forming surface 1 of mn+ at the tip;
It has a cylindrical shape of 5 mm. The second molding part 6 of the female molding member 8 has a cylindrical shape with an inner diameter of 8.5n+m, which has a curvature radius of 8.47±o and a second optical molding surface 5 of oimn+ at the bottom, and is designed to drain excess polymer composition liquid. It has a liquid reservoir 6a for holding the spacer 9 so as not to come into contact with it. Further, the spacer 9 has a flat ring shape with a uniform wall thickness of 3,00±0.01 ma+.

In this example, methyl methacrylate 100f?
1 ft) part, ethylene glycol dimethacrylate 11
A polymer composition consisting of 0.2 parts by weight of azobisisobutyronitrile and an acid solution were added to the second molding section 6 of the female molding member 8.
．． The spacer 9 was placed at the contact portion 7 of the female molded member 8 with the spacer, and the male molded member 4 was assembled along the main axis.

The mold thus prepared was placed in a hot air circulation constant temperature bath and heated at 50° C. for 12 hours and at 90° C. for 6 hours. After heating, the mold was cooled to room temperature and then disassembled, and the molded contact lens was taken out.

There were no voids or voids on the surface or inside of the contact lens thus obtained, and there was no formation of paris around the lens. The base curve of this contact lens is 8.00±
0.02mm, and the radius of curvature of the front curve is 8.
47±0.02 mm, and its size was 8.5 mm. In addition, when we measured the refractive power of the molded contact lens using a lens meter, it was found to be -3,00±
The refractive power was 0.05 days, and the observed corona was also good.

Embodiment 2 FIG. 3 is a cutaway front view showing a second embodiment of the present invention. The male molded member 13 and the female molded member 17 are made by machining stainless steel,
The spacer 18 is made by injection molding low density polyethylene.

The first molded part 11 of this embodiment has a radius of curvature of 7.60±0,0
It has a cylindrical shape with a diameter of 8.8 mm and has a first optical molding surface 10 that is a concave spherical surface with a radius of curvature of 7.80±0.005 mm. It has a cylindrical shape with an inner diameter of 8.811111 mm and a surface 14, and has a liquid reservoir 15a for holding excess polymer composition liquid. Moreover, the spacer 18 is 5.
It has a flat ring shape with a uniform wall thickness of 00±o, oinim.

The polymer composition used in this example, 40 parts by weight of tris-trimethylsiloxanylsilylpropyl methacrylate, 60 parts by weight of ethyl methacrylate, 2 m0 parts of triethylene glycol dimethacrylate, azopisdimethylvale [
It consists of a mixed solution of 0.5 Lffi parts of 1 nitrile.

In the same manner as in Example 1, the polymerization composition liquid was injected, the mold was assembled, and polymerization was carried out by heating in a constant temperature bath at 40°C for 8 hours, at 60'C for 4 hours, and at 80°C for 5 hours. After cooling to room temperature, the mold was disassembled and the molded contact lens was taken out.

The molded contact lens has no external defects such as chips or cracks, and the radius of curvature of the base curve is 7.80±0.
．． It had a radius of curvature of 0.01 mm, a front curve of 7.60 + 0.01 mm, and a size of 8.8 mm.

Further, the refractive power of this lens was +2.00±0.05 diopters.

Embodiment 3 FIG. 4 is a cutaway front view showing a third embodiment of the present invention. The male molded member 22 and the female molded member 26 of this embodiment are made by injection molding polychlorotrifluoroethylene, and the spacer 27 is made by compression molding polyurethane rubber. In addition, in the figure, 37 is a second optical surface, and 38 is a second molded part.

The first molded portion 20 of the male molded member 22 has a radius of curvature of 5.93.
The second molding part 24 of the female molding member 26 has a curvature radius of 6.32±0.01.
It has a cylindrical shape with an inner diameter of 10.0 mm and a second optical molding surface 23 made of a concave spherical surface of mm in diameter, and has a liquid reservoir 24a. Also, the spacer has a thickness of 2.00±0.01m.
It has a l1l o-ring shape.

88 parts of 2-hydroxyethyl methacrylate, 10 parts by weight of methyl methacrylate, 1 mm part of ethylene glycol dimethacrylate, 1.5 parts by weight of methacrylic acid,
A polymer composition containing 0.2 parts by weight of azobisisobutyronitrile was injected in the same manner as in Example 1, a mold was assembled, and the mixture was heated at 40°C for 10 hours in a constant temperature bath at 60°C.
After heating at 80°C for 4 hours, the mold was disassembled and the molded contact lens was taken out.

The molded lens has no edges or edges and has a radius of curvature of 5.
Base curve of 93±0.02mm, radius of curvature 6.32
It had a front curve of ±0.02 mm and a size of 10.0 mm.

Next, the obtained dry lens is immersed in physiological saline,
It was saturated and swelled to make soft contact lenses. This soft contact lens has a base curve radius of 8.0.
mm, size 13.5±0.03 mm, and had a stable shape without deformation or turbidity. The refractive power of this lens is -3,00±0.08 days,
The moisture content was 40±0.3%.

Comparative Example 1 FIG. 5 is a cutaway front view showing a comparative example. The male molded member 30 and female molded member 33 of this comparative example were made of stainless steel, and no spacer was used. In addition, in the figure, 28 is the first optical surface, 29 is the first molding part, and 3
1 is a second optical surface, and 32 is a second molded part.

After injecting 0.2 mj2 of the polymer composition liquid used in Example 2 into the mold and assembling the molds, heating was performed in a constant temperature bath in the same manner as in Example 1. When the mold was cooled to room temperature and then disassembled and the molded contact lens was taken out, sink marks had occurred on the surface and periphery of the lens, and it could not be used as a contact lens.

Comparative example 2 FIG. 6 is a cutaway front view showing another comparative example.

The male molded member 36 and the -l molded member 39 are made of ethylene-vinyl acetate copolymer, and the first molded part 35 of the male molded member 36 has an annular thin-walled rim 40 integrally attached to its periphery. It has a first optical surface 34. This thin rim 4
0 is provided to absorb the polymerization shrinkage by bending toward the center of the lens to reduce its height when the polymer composition exhibits volumetric shrinkage during polymerization. In addition, in the figure, 37 is a second optical surface, and 38 is a second molded part.

The outer diameter of the male molded member 35 is 7.9em, and the radius of curvature is 7.9em.
It has a first optical surface 34 of 45±0.03m+n,
The female molding member 39 has an inner diameter of 8.2 to 8.4 mm;
The second optical surface 37 has a radius of curvature of 8.55±o, osmm.

A polymer composition solution consisting of 98 mff 1 part of methyl methacrylate, 20 parts by weight of ethylene glycol dimethacrylate, and 0.31 part of di-t-butylcyclohexyl peroxydicarbonate was added to 0.3+1j! The mixture was injected into a molded member of ffi, and the mold was assembled and heated in a constant temperature bath at 60° C. for 1.5 hours, then cooled and the mold was disassembled.

The obtained contact lens has no sink marks or burrs, but the radius of curvature of its base curve is 7.47 ± 0.4 m.
m, and good viscosity could not be obtained. Also, the measured refractive power of this lens is -1,50 to -8,50.
It showed significant variation in diobacterium and had a practical problem.

A digital contact gauge manufactured by NEI2 Co., Ltd. and a laser interferometer manufactured by Fuji Photo Optical TA Co., Ltd. were used to measure the radius of curvature, and a projector manufactured by Nikon Co., Ltd. was used to measure the diameter. In addition, a stereoscopic microscope and an optical microscope were used to observe the appearance.

[Effects of the Invention] The contact lenses obtained from the examples of the present invention do not have the problem of sink marks or the inability to obtain sufficient optical precision as seen in the comparative examples, and the contact lenses obtained from the molded contact lenses There is no problem of Paris occurring in the surrounding area. That is, by using the contact lens mold according to the present invention, the following excellent effects can be obtained.

1. Contact lenses without defects such as sink burrs can be manufactured extremely easily without any machining.

2. The optical properties and physical properties of the molded lens are extremely stable and have excellent reproducibility.

3. Contact lenses with excellent optical performance can be manufactured with an extremely small number of steps and with good reproducibility.

4 base curves, front curves, bevels, flange curves, peripheral shapes, etc. can be molded with extremely diverse designs.

5. Because the molded parts and spacers are independent, it is possible to freely select the materials for each, and the range of materials that can be used is wide. You can choose.

6. Since the spacer does not come into contact with the polymerization composition solution,
The spacer material can be selected without considering problems such as dissolution and deterioration due to the polymer composition solution.

7. It can be used for both hard contact lenses and soft contact lenses, and is not limited by the mechanical workability of the contact lens material to be molded.

Such effects of the present invention are achieved by forming a fitting structure between the first molding member of the male molding member and the second molding part of the female molding member, thereby blocking the gap for contact lens molding from the outside. , the polymer composition solution does not come into contact with the air and excess polymer composition solution does not adhere to the surroundings of the lens, the spacer is made of a flexible material, and the volume shrinkage due to polymerization shrinkage is suppressed by reducing the thickness of the spacer. The material can be absorbed by the proximity of the parts, and the molded part itself does not deform or shrink due to polymerization shrinkage, so important dimensions such as the radius of curvature and diameter of the contact lens to be molded do not change. This is achieved for the first time due to the unique features of the mold according to the invention.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway exploded perspective view of a first embodiment of the present invention, Fig. 2 is a longitudinal sectional front view of the first embodiment, and Fig. 3 is a longitudinal sectional front view showing a second embodiment of the invention. , FIG. 4 is a longitudinal sectional front view showing a third embodiment according to the present invention, and FIGS. 5 and 6 are longitudinal sectional front views showing a comparative example. 1.10.19...first optical surface, 5.14.23.3
1.37...Second optical surface, 2.11.20...First
Molding part, 6.15.24...Second molding part, 3.7.1
2.16.21.25...Contact part with spacer, 4
．． 13.22...first molded member, 8.17.26...
・Second molded member, 9.18.27...Spacer, 5
a, 15a, 24a...liquid reservoir, 10...circular rim. Figure 4 Figure 1 Figure 2 Procedures Nefli official text (self-motivated) 19861
16th of the month

Claims (1)

[Scope of Claims] 1. A contact lens mold characterized in that a male molding member and a female molding member are joined along the main axis via a spacer around the outer periphery of the molding portion of both molding members. 2. The male and female molding members have an optical molding surface, and the spacer has a ring shape having a common main axis with the molding member, and is located at a position separated from the optical molding surface. A contact lens mold according to claim 1. 3. The contact lens mold according to claim 1, wherein the molding member is provided with a liquid reservoir. 4. The contact lens mold according to claim 3, wherein the liquid reservoir is provided in a slope shape around the insertion portion of the female molding member. 5. The contact according to claim 1, wherein the optical molding surface of the male molding member is substantially convex, and the optical molding surface of the female molding member is substantially concave. Lens mold. 6. The contact according to claim 1, wherein the optical molding surface of the male molding member is a substantially concave surface, and the optical molding surface of the female molding member is a substantially convex surface. Lens mold. 7. The contact lens mold according to claim 1, wherein the spacer component is made of a thermoplastic material or a rubber elastic body.