Mould for the integrated structure of plastic frame for glasses

Abstract

The present invention relates to a mold for a plastic frame joint structure used for glasses, characterized in that it includes an upper mold and a lower mold, the upper mold is provided with an upper film injection molding channel, the lower mold is provided with a lower film injection molding channel, the upper film injection molding channel has an inner concave channel and a side convex edge, the side convex edge has a side wall, the side wall of the side convex edge is located on one side of the inner concave channel to form an outer parting molding injection surface for injection molding the outer parting surface of the plastic frame of glasses, the lower film injection molding channel has a lower inner concave channel and an inner convex edge, the inner convex edge has an inner side wall, the inner side wall of the inner convex edge is located on one side of the lower inner concave channel to form an inner parting molding injection surface for injection molding the inner parting surface of the plastic frame of glasses, and when the upper mold and the lower mold are closed, the upper film injection molding channel and the lower film injection molding channel of the lower mold form a complete plastic frame injection molding cavity for glasses. The design of this scheme is reasonable, and a convenient demoulding structure is realized, and the injection molded product is not deformed when demoulding, thereby improving the stability of the injection molded product.

Description

Technical Field

[0001] The invention relates to glasses, in particular to a mold of a plastic frame connected structure used for glasses. Background Art

[0002] Glasses are a combination of lenses and frames, used to improve vision, protect eyes or for decorative purposes. Glasses can correct a variety of vision problems, including myopia, hyperopia, astigmatism, presbyopia, strabismus or amblyopia.

[0003] Glasses are made up of lenses and frames. There are 15 types of glasses, including myopia glasses, hyperopia glasses, reading glasses, astigmatism glasses, plain glasses, computer goggles, goggles, swimming goggles, night vision goggles, e-sports goggles, e-sports goggles, wind goggles, sunglasses, toy glasses, and sunglasses. There are also special glasses for viewing 3D stereoscopic images or virtual reality images. Other types of glasses include goggles, sunglasses, swimming goggles, etc., which provide various protections for the eyes.

[0004] Glasses are mainly manufactured by injection molding. However, it is difficult to make molds for one-piece plastic frames. It is necessary to consider not only the customer's requirements for the frame shape, but also the suggestions for mold processing and the simplification of post-production processes. Currently, molds have the following three shortcomings: (1) Deformation of the product during demolding; (2) Difficulty in demolding due to deep glue positions; and (3) Instability of tail pin injection molding. Summary of the invention

[0005] The present invention provides a mold for a plastic frame integrated structure for glasses, which solves the above-mentioned problems existing in the use process of the prior art.

[0006] The technical solution of the present invention is achieved in this way:

[0007] The mold for the integrated structure of the plastic frame of glasses is characterized in that it includes an upper mold and a lower mold, the upper mold is provided with an upper film injection molding channel, and the lower mold is provided with a lower film injection molding channel, the upper film injection molding channel has an inner concave channel and a side convex edge, the side convex edge has a side wall, the side wall of the side convex edge is located on one side of the inner concave channel to form an outer parting injection molding surface for injection molding the outer parting surface of the plastic frame of glasses, the lower film injection molding channel has a lower inner concave channel and an inner convex edge, the inner convex edge has an inner side wall, the inner side wall of the inner convex edge is located on one side of the lower inner concave channel to form an inner parting injection molding surface for injection molding the inner parting surface of the plastic frame of glasses, and when the upper mold and the lower mold are closed, the upper film injection molding channel and the lower film injection molding channel of the lower mold form a complete plastic frame injection molding cavity for glasses.

[0008] Preferably, a tail pin injection ejection structure is installed on the lower mold.

[0009] Preferably, the lower mold is provided with a first tail needle seat mounting groove and a second tail needle seat mounting groove, the first tail needle seat mounting groove and the second tail needle seat mounting groove are located on the side of the lower film injection molding channel, an intermediate groove is installed between the first tail needle seat mounting groove and the second tail needle seat mounting groove, a tail needle seat for placing the tail needle is installed on the intermediate groove, a push rod is connected below the tail needle seat, and a tail needle fixing block for placing the tail needle is installed on the two tail needle seat mounting grooves, and the tail needle seat, push rod, tail needle and tail needle fixing block constitute the above-mentioned tail needle injection molding ejection structure.

[0010] Preferably, the tail needle seat has a first tail needle groove and a second tail needle groove, both of which are arc-shaped structures, and a first aisle groove is provided between the first tail needle groove and the first tail needle seat mounting groove, and the first aisle groove is communicated with the first tail needle seat mounting groove, and a second aisle groove is provided between the second tail needle groove and the second tail needle seat mounting groove, and the second aisle groove is communicated with the second tail needle seat mounting groove.

[0011] Preferably, the first tail needle groove, the first tail needle seat installation groove and the first passage groove are on the same axis.

[0012] Preferably, the second tail needle groove, the second tail needle seat installation groove and the second passage groove are on the same axis.

[0013] Preferably, the lower mold is equipped with a core-pulling spring plate structure.

[0014] Preferably, the core-pulling spring plate structure includes a spring plate, a spring plate mounting seat and a lower fixed seat, a spring is installed on the lower fixed seat, a spring mounting hole for installing the spring is opened on the lower end surface of the lower mold, the spring plate mounting seat is fixedly installed on the lower fixed seat, the spring plate is installed on the spring plate fixing seat, the lower mold is opened with a slideway adapted to the spring plate, the slideway is communicated with the lower inner recess, when the spring is compressed, the spring plate extends into the lower inner recess to form an inner extension end for forming a mounting groove for the lens of the plastic frame of glasses during injection molding.

[0015] Preferably, four spring mounting holes are installed and evenly distributed on the lower end surface of the lower mold.

[0016] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) By designing the uniformity difference between the parting surface of the product and the front and rear films, the deformation of the product during the demoulding process can be solved;

[0018] (2) Solve the difficulty of demoulding at deep glue position by adding a core-pulling spring plate structure;

[0019] (3) The problem of unstable tail pin injection molding is solved by designing a special-shaped tail pin structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of a mold for a one-piece plastic frame used for glasses.

[0022] Figure 2 It is a structural schematic diagram of the upper mold.

[0023] Figure 3 It is a schematic diagram of the structure of the lower mold.

[0024] Figure 4 yes Figure 3 Example 1 of a stereogram.

[0025] Figure 5 yes Figure 3 Example 2 of stereogram.

[0026] Figure 6 It is a schematic diagram of the bottom of the lower mold.

[0027] Figure 7 yes Figure 4 A partial enlarged view of point I in the middle.

[0028] Figure 8 This is a schematic diagram of the plastic frame, tail needle injection ejection structure and core pulling spring plate structure Figure 1 .

[0029] Fig. 9 This is a schematic diagram of the plastic frame, tail needle injection ejection structure and core pulling spring plate structure Figure 2 .

[0030] Fig.10 It is a schematic diagram of the compressed state of the spring in the core-pulling spring plate structure.

[0031] Fig.11 It is a schematic diagram of the uncompressed state of the spring in the core-pulling spring plate structure.

[0032] Fig.12 It is a schematic diagram of the structure of the lower mold.

[0033] Fig.13 yes Fig.12 A partial enlarged view of point I in the middle. DETAILED DESCRIPTION

[0034] The following will be combined with the attached embodiment of the present invention Figure 1-13, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0035] like Figures 1 to 9 As shown, the present invention discloses a mold for a plastic frame connected structure for glasses, comprising an upper mold 2 and a lower mold 1, wherein the upper mold 2 is provided with an upper film injection molding channel 2-1, and the lower mold 1 is provided with a lower film injection molding channel 1-1, wherein the upper film injection molding channel has an inner concave channel 2-2 and a side convex edge 2-3, wherein the side convex edge 2-3 has a side wall 2-4, and the side wall 2-4 of the side convex edge is located on one side of the inner concave channel to form a parting pattern for the outer side of the injection molding plastic frame of glasses. The outer parting injection surface of the surface, the lower film injection molding channel 1-1 has a lower inner concave channel 1-2 and an inner convex edge 1-3, the inner convex edge has an inner wall 1-4, the inner wall 1-4 of the inner convex edge is located on one side of the lower inner concave channel to form an inner parting injection molding surface for injection molding the inner parting surface of the eyeglass plastic frame, when the upper mold and the lower mold are closed, the upper film injection molding channel and the lower film injection molding channel of the lower mold form a complete eyeglass plastic frame injection cavity.

[0036] It can be seen from the above scheme that the upper mold 2 and the lower mold 1 are both half of the glasses plastic frame injection cavity. Through reasonable design, the two drop structures of the outer parting injection surface and the inner parting injection surface form a complete glasses plastic frame 7 injection cavity. The advantage of this scheme is that after the injection is completed, during the opening of the upper mold, the outer parting injection surface will first separate from the injected plastic frame, thereby realizing local rapid demolding. At the same time, it also solves the current problem that the entire injection cavity is in the lower mold, and the deformation of the plastic frame that will occur during the demolding process, and the difficulty in demolding, the design of this scheme realizes demolding without deformation while making demolding more convenient, refer to Figure 3 The plastic frame 7 in the figure will be exposed to the outer side surface A after the upper mold is demolded, that is, the outer side surface A is formed by the outer parting injection surface of the upper mold 2, and the inner side surface B of the plastic frame 7 is formed by the inner parting injection surface of the lower mold 2.

[0037] In order to solve the problem of difficult demoulding of the tail pin, a tail pin injection ejection structure is installed on the lower mold 1.

[0038] The specific scheme of the tail needle injection ejection structure is as follows: the lower mold 1 is provided with a first tail needle seat installation groove 3 and a second tail needle seat installation groove 4, the first tail needle seat installation groove 3 and the second tail needle seat installation groove 4 are located on the side of the lower film injection molding channel, an intermediate groove is installed between the first tail needle seat installation groove and the second tail needle seat installation groove, a tail needle seat 5 for placing the tail needle is installed on the intermediate groove, a push rod 6 is connected below the tail needle seat 5, and a tail needle fixing block for placing the tail needle is installed on the two tail needle seat installation grooves, and the tail needle seat, push rod, tail needle and tail needle fixing block constitute the above-mentioned tail needle injection ejection structure. The tail needle fixing block is divided into an inner tail needle fixing block 9 and an outer tail needle fixing block 8, and the tail needle seat 5 can be ejected by driving the push rod 6 to move upward during operation to realize the ejection of the tail needle.

[0039] The tail needle seat has a first tail needle groove 10 and a second tail needle groove 11, both of which are arc-shaped structures. A first aisle groove 13 is provided between the first tail needle groove 10 and the first tail needle seat mounting groove 3, and the first aisle groove is communicated with the first tail needle seat mounting groove 3. A second aisle groove 12 is provided between the second tail needle groove 11 and the second tail needle seat mounting groove 4, and the second aisle groove 12 is communicated with the second tail needle seat mounting groove 4.

[0040] It should be pointed out that the first tail needle seat mounting groove 3 and the second tail needle seat mounting groove 4 of the present scheme form a height difference, so that the inner tail needle fixing block 9 and the outer tail needle fixing block 8 installed in the first tail needle seat mounting groove 3 and the second tail needle seat mounting groove 4 are also a height difference structure, forming an anisotropic structure, the purpose of which is also to facilitate demolding and solve the current problem that the tail needle is not easy to demold.

[0041] In order to ensure the strength of the tail needle, preferably, the first tail needle groove 10, the first tail needle seat installation groove 3 and the first passage groove 13 are on the same axis. Preferably, the second tail needle groove 11, the second tail needle seat installation groove 4 and the second passage groove 12 are on the same axis.

[0042] Example 2

[0043] refer to Figure 10-13This embodiment is improved on the basis of the first embodiment, mainly for the current frame that needs to be injection molded with an inner concave structure for assembling lenses. Generally, convex strips are directly set on the mold, but the difficulty of this structure is that the frame and the convex strips will have a strong adhesion after injection molding, which is difficult to demold. It is easy to happen when using ejection or manual removal, and it is difficult to take out and the removal process will cause deformation of the frame. To solve this problem, this scheme improves the mold, and the specific scheme is as follows: the lower mold is equipped with a core-pulling spring plate structure. The core-pulling spring plate structure includes a spring plate 14, a spring plate mounting seat 15 and a lower fixed seat 16, a spring 17 is mounted on the lower fixed seat 16, a spring mounting hole 18 for mounting the spring is provided on the lower end face of the lower mold, the spring plate mounting seat is fixedly mounted on the lower fixed seat, the spring plate 14 is mounted on the spring plate fixing seat 16, the lower mold is provided with a slideway adapted to the spring plate 14, the spring plate 14 can slide in the slideway under the action of force, the slideway is connected to the lower inner concave, when the spring is compressed, the spring plate extends into the lower inner concave to form an inner extension end 14-1 for molding the mounting groove 7-1 of the eyeglass plastic frame lens during injection molding. In order to improve stability, four spring mounting holes are installed, evenly distributed on the lower end face of the lower mold.

[0044] The principle of the above scheme is: when injection molding is required, the upper mold is buckled on the lower mold, which can be an external pressure on the upper mold (such as a press) or the upper mold's own gravity, depending on the elastic force of the spring. In a normal state, the spring is not compressed, and the upper end surface of the spring plate does not extend into the lower inner concave channel. When subjected to force, the spring compresses the lower mold to move downward, and at this time, the inner extension end 14-1 of the spring plate will move upward relative to the slideway to extend into the lower inner concave channel;

[0045] After the processing is completed, the upper mold is opened. At this time, the elastic force of the spring will push the lower mold upward, and then the inner extension end 14-1 of the spring plate will leave the lens mounting groove 7-1 of the eyeglass plastic frame, realizing core pulling and facilitating smooth demoulding.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold for a plastic frame structure for glasses, characterized by: The invention comprises an upper mold and a lower mold, wherein the upper mold is provided with an upper film injection molding channel, and the lower mold is provided with a lower film injection molding channel, wherein the upper film injection molding channel has an inner concave channel and a side convex edge, wherein the side convex edge has a side wall, and the side wall of the side convex edge is located at one side of the inner concave channel to form an outer parting molding injection molding surface for molding the outer parting molding surface of the spectacles plastic frame, wherein the lower film injection molding channel has a lower inner concave channel and an inner convex edge, wherein the inner convex edge has an inner side wall, and the inner side wall of the inner convex edge is located at one side of the lower inner concave channel to form an inner parting molding injection molding surface for molding the inner parting molding surface of the spectacles plastic frame, wherein the upper mold and the lower mold are combined. When forming the film, the upper film injection molding channel and the lower film injection molding channel of the lower mold form a complete eyeglass plastic frame injection molding cavity, the lower mold is equipped with a tail needle injection molding ejection structure, the lower mold is provided with a first tail needle seat mounting groove and a second tail needle seat mounting groove, the first tail needle seat mounting groove and the second tail needle seat mounting groove are located on the side of the lower film injection molding channel, an intermediate groove is installed between the first tail needle seat mounting groove and the second tail needle seat mounting groove, a tail needle seat for placing the tail needle is installed on the intermediate groove, a push rod is connected below the tail needle seat, and a tail needle fixing block for placing the tail needle is installed on the two tail needle seat mounting grooves, the tail needle seat, the push rod, the tail needle and the tail needle fixing block constitute the above-mentioned tail needle injection molding ejection structure, and the lower mold is equipped with a core pulling spring plate structure.

2. The mold of the plastic frame joint structure for glasses according to claim 1, characterized in that: The tail needle seat has a first tail needle groove and a second tail needle groove, both of which are arc-shaped structures, a first aisle groove is provided between the first tail needle groove and the first tail needle seat mounting groove, the first aisle groove is communicated with the first tail needle seat mounting groove, a second aisle groove is provided between the second tail needle groove and the second tail needle seat mounting groove, the second aisle groove is communicated with the second tail needle seat mounting groove.

3. The mold of the plastic frame joint structure for glasses according to claim 2, characterized in that: The first tail needle groove, the first tail needle seat installation groove and the first passage groove are located on the same axis.

4. The mold of the plastic frame joint structure for glasses according to claim 2 or 3, characterized in that: The second tail needle groove, the second tail needle seat installation groove and the second passage groove are located on the same axis.

5. The mold of the plastic frame joint structure for glasses according to claim 3 or 4, characterized in that: The first tail needle seat installation groove and the second tail needle seat installation groove form a height difference, so that the tail needle fixing blocks installed in the first tail needle seat installation groove and the second tail needle seat installation groove also have a height difference structure, forming a heterogeneous structure.

6. The mold of the plastic frame joint structure for glasses according to claim 5, characterized in that: The core-pulling spring plate structure includes a spring plate, a spring plate mounting seat and a lower fixed seat, a spring is installed on the lower fixed seat, a spring mounting hole for installing the spring is opened on the lower end surface of the lower mold, the spring plate mounting seat is fixedly installed on the lower fixed seat, the spring plate is installed on the spring plate fixing seat, the lower mold is opened with a slideway adapted to the spring plate, the slideway is communicated with the lower inner recess, when the spring is compressed, the spring plate extends into the lower inner recess to form an inner extension end for forming a mounting groove for the lens of the plastic frame of glasses during injection molding.

7. The mold of the plastic frame joint structure for glasses according to claim 6, characterized in that: There are four spring mounting holes evenly distributed on the lower end surface of the lower mold.

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