CN219445984U - Lens injection mold with cutting structure - Google Patents

Abstract

The utility model relates to the technical field of lens injection molds, in particular to a lens injection mold with a cutting structure; including the die cavity, the top of cover half still is equipped with sprue and slope subchannel, every the cutting hole has been seted up respectively to the bottom surface both sides of slope subchannel, first ejecting hole has been seted up at the bottom surface middle part of slope subchannel, the second ejecting hole has been seted up at the bottom surface middle part of sprue, every the third ejecting hole has been seted up at the bottom surface middle part of die cavity, the inside of cover half is equipped with takes off the material chamber, take off material intracavity sliding connection has the ejector plate, be equipped with the cutter on the ejector plate, be equipped with on first ejecting hole, second ejecting hole and the third ejecting hole and postpone ejecting structure. According to the utility model, the connecting ribs in the inclined sub-runners can be cut after injection molding is finished, and ejection stripping is carried out on the lens injection molding piece, the connecting ribs in the inclined sub-runners and injection molding waste in the main runners after cutting processing, so that the processing efficiency is high.

Description

Lens injection mold with cutting structure

Technical Field

The utility model relates to the technical field of lens injection molds, in particular to a lens injection mold with a cutting structure.

Background

The spectacle lenses, namely lenses, are made of transparent materials with one or more curved surfaces, which are made of optical materials such as glass or resin, are often assembled with spectacle frames to form spectacles after polishing, so that the eyesight of users is corrected, clear vision is obtained, the classification modes of the lenses are various, and the lenses can be classified according to the materials, functions, curved surface treatment processes and the like of the lenses.

In the lens production process, an injection mold is required. For example: the utility model discloses a chinese patent with publication No. CN212979056U discloses a lens injection mold with cutting structure, through being provided with special cutting structure and ejecting structure, ejecting action delays in cutting action, cut the connecting rib earlier in the in-process that the liftout board risees after the injection molding is accomplished, then realize ejecting to the lens that the shaping obtained and take off the material, can realize injection molding processing and cutting processing at same station, machining efficiency is high, the processing cost is low, but when this mould cuts the connecting rib, lack runner thimble structure, can be detained in the subchannel after the connecting rib is cut, follow-up needs the manual work to take out, it is time consuming and laborious, the operation is inconvenient, and influence follow-up lens injection mold's availability factor, and for this reason, a lens injection mold with cutting structure is proposed.

Disclosure of Invention

Based on this, it is necessary to provide a lens injection mold with decide structure to prior art problem, can realize injection molding processing, decide processing and ejecting and take off the material, need not the manual work and take out the connecting rod that is detained in the subchannel, labour saving and time saving, convenient operation, machining efficiency is high.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

the utility model provides a lens injection mold with decide structure, includes movable mould, cover half and sets up in the die cavity at cover half top, and the top central point department of movable mould is provided with annotates the material passageway, the die cavity is equipped with 4, 4 the die cavity is rectangular array and distributes, the top of cover half still is equipped with and is circular form's sprue and 4 slope branch runners, the position of sprue is corresponding with annotating the position of material passageway, the week side of sprue is 4 slope branch runners of annular array distribution, every one side that the sprue was kept away from to the slope branch runner is linked together with the die cavity, every the lower extreme of slope branch runner is located adjacent die cavity setting, every two decide the hole has been seted up respectively to the bottom both sides of slope branch runner, the bottom of mould corresponds the position of deciding the hole and dodges the groove, every first ejecting hole has been seted up at the bottom surface middle part of slope branch runner, every the bottom surface middle part of die cavity has seted up the third ejecting hole, the inside cutting off cavity, first ejecting plate, the first ejecting plate that just has the first ejecting hole, the first ejecting plate that links to each other ejecting hole, the ejecting plate that has on the first ejecting hole, the first ejecting plate that the ejection plate has the first ejecting hole.

Preferably, a slot penetrating through the fixed die is formed in the bottom of the stripping cavity.

Preferably, the delayed ejection structure comprises an ejection block, an ejection rod, a spring and a base, wherein the upper end of the ejection rod is fixedly connected with the ejection block, the lower end of the ejection rod is fixedly connected with the base, the spring is sleeved on the ejection rod, the upper end of the spring is fixedly connected with the top wall of the inner side of the stripping cavity, and the lower end of the spring is fixedly connected with the upper surface of the base.

Preferably, the inner side walls of the first ejection hole, the second ejection hole and the third ejection hole are respectively provided with a stop block for stopping the ejection block from falling down, the top parts of the ejection blocks are respectively positioned on the same plane with the bottom surface of the end face, and the bottom parts of the ejection blocks are abutted against the stop blocks.

Preferably, positioning guide rods are fixedly arranged at four corners of the bottom surface of the movable die, a limiting guide sleeve is embedded and arranged at the position, corresponding to the positioning guide rods, of the top surface of the fixed die, and the positioning guide rods are in guiding fit connection with the limiting guide sleeve.

The beneficial effects of the utility model are as follows: according to the utility model, the cutters and the cutting holes are arranged, so that the connecting ribs in the inclined sub-runners can be cut after injection molding is finished, and under the action of the ejector plate, the delayed ejection structure, the first ejection hole, the second ejection hole and the third ejection hole, ejection stripping can be carried out on the lens injection molding piece, the connecting ribs in the inclined sub-runners and injection molding waste in the main runners after cutting, injection molding processing, cutting processing and ejection stripping can be realized at the same station, the connecting ribs retained in the sub-runners do not need to be manually taken out, so that the time and labor are saved, the operation is convenient, the processing efficiency is high, and the injection molding raw materials can flow to the mold cavity conveniently through the arrangement of the inclined sub-runners, so that injection molding processing can be realized.

Drawings

FIG. 1 is a schematic view of a lens injection mold with a cutting structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a cutting process according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of ejection stripping in an embodiment of the present utility model.

Reference numerals: the mold comprises a movable mold 1, a fixed mold 2, a positioning guide rod 3, a limiting guide sleeve 4, a material injection channel 5, a main runner 6, an inclined runner 7, a mold cavity 8, an ejection block 9, a stop block 10, an ejection rod 11, a spring 12, a base 13, an ejection plate 14, a cutter 15, a slot 16, a third ejection hole 17, a first ejection hole 18 and a second ejection hole 19.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, a lens injection mold with cutting structure comprises a movable mold 1, a fixed mold 2 and a mold cavity 8 arranged at the top of the fixed mold 2, wherein a material injection channel 5 is arranged at the center of the top of the movable mold 1, 4 mold cavities 8 are distributed in a rectangular array, a circular main runner 6 and 4 inclined sub-runners 7 are also arranged at the top of the fixed mold 2, the position of the main runner 6 corresponds to the position of the material injection channel 5, 4 inclined sub-runners 7 are distributed in an annular array on the periphery of the main runner 6, one side of each inclined sub-runner 7 far away from the main runner 6 is communicated with the mold cavity 8, the lower end of each inclined sub-runner 7 is arranged in the adjacent mold cavity 8, two cutting holes are respectively formed in two sides of the bottom surface of each inclined sub-runner 7, avoiding grooves are formed in the bottom of the movable die 1 corresponding to the positions of the cutting holes, first ejection holes 18 are formed in the middle of the bottom surface of each inclined sub-runner 7, second ejection holes 19 are formed in the middle of the bottom surface of each main runner 6, third ejection holes 17 are formed in the middle of the bottom surface of each die cavity 8, a stripping cavity is formed in the inside of the fixed die 2, the cutting holes, the first ejection holes 18, the second ejection holes 19 and the third ejection holes 17 are communicated with the stripping cavity, ejector plates 14 are connected in the stripping cavity in a sliding mode, cutters 15 are arranged on the ejector plates 14 corresponding to the positions of the cutting holes, and delayed ejection structures are arranged on the first ejection holes 18, the second ejection holes 19 and the third ejection holes 17.

In this embodiment, the position of the main runner 6 corresponds to the position of the injection channel 5, and when injection molding is performed, injection molding raw materials are injected into the main runner 6 from the injection channel 5, and flow into each mold cavity 8 through the main runner 6 and the inclined sub-runners 7 in sequence, so as to perform injection molding; in addition, the inclined runners 7 and the lower ends of each inclined runner 7 are arranged adjacent to the mold cavities 8, so that compared with the traditional horizontal runners, injection molding materials can flow to the mold cavities 8 conveniently, and injection molding processing can be realized.

In this embodiment, two cutting holes are respectively formed on two sides of the bottom surface of the inclined sub-runner 7, when the connecting ribs in the inclined sub-runner 7 need to be cut, the cutter 15 is driven to move upwards in the rising process of the ejector plate 14, and then the connecting ribs are cut, so that the connecting ribs in the inclined sub-runner 7 and the lens injection molding piece in the mold cavity 8 are automatically cut, the cutting processing procedure is reduced, and the time and labor cost are further saved.

In this embodiment, the delayed ejection structures are arranged on the first ejection hole 18, the second ejection hole 19 and the third ejection hole 17, so that ejection and stripping of the lens injection molding piece, the connecting ribs in the inclined sub-runner 7 and the injection molding waste in the main runner 6 can be realized.

In this embodiment, a slot 16 penetrating through the fixed mold 2 is formed at the bottom of the stripping cavity.

In the embodiment, the slotting 16 is arranged, the material removing motor and the telescopic rod are matched, the telescopic shaft of the material removing motor is connected with the telescopic rod, and one end of the telescopic rod, which is far away from the material removing motor, penetrates through the slotting 16 and is connected with the ejector plate 14, so that cutting processing and ejection material removing are conveniently realized.

In this embodiment, the delayed ejection structure includes an ejector block 9, an ejector rod 11, a spring 12 and a base 13, where the upper end of the ejector rod 11 is fixedly connected with the ejector block 9, the lower end of the ejector rod 11 is fixedly connected with the base 13, the spring 12 is sleeved on the ejector rod 11, the upper end of the spring 12 is fixedly connected with the top wall of the inner side of the stripping cavity, and the lower end of the spring 12 is fixedly connected with the upper surface of the base 13; the inner side walls of the first ejection hole 18, the second ejection hole 19 and the third ejection hole 17 are respectively provided with a stop block 10 for blocking the ejection block 9 from falling down, the tops of the ejection blocks 9 are respectively positioned on the same plane with the bottom surface of the end face, and the bottoms of the ejection blocks 9 are abutted against the stop blocks 10.

In this embodiment, the delayed ejection structure according to the present utility model is composed of an ejection block 9, an ejection rod 11, a spring 12 and a base 13, where the delayed ejection structure can be ejected upward when the ejection plate 14 is lifted up to the position of the base 13 and moves upward, so that the ejection block 9 is ejected upward, so as to realize ejection and stripping; in addition, by arranging the spring 12, the cushioning effect can be given to the lens injection molding piece, and the damage to the lens injection molding piece caused by the too fast movement of the ejection block 9 can be prevented; meanwhile, through setting up the dog 10, can make the bottom and the dog 10 butt of ejecting piece 9, and then guarantee that the top of ejecting piece 9 is in the coplanar with the bottom surface of place terminal surface respectively all the time, when needs ejection knockout, ejecting piece 9 only can upwards rise, and after the knockout, under the effect of spring 12, ejector plate 14 resumes initial position, and initial position this moment is: the upper ends of the ejection blocks 9 are still respectively positioned on the same plane with the bottom surface of the end surface, and the lower ends of the ejection blocks 9 are abutted against the stop blocks 10.

In this embodiment, the four corners of the bottom surface of the movable mold 1 are fixedly provided with positioning guide rods 3, the top surface of the fixed mold 2 is embedded with a limiting guide sleeve 4 corresponding to the positioning guide rods 3, and the positioning guide rods 3 are in guiding fit connection with the limiting guide sleeve 4.

In the embodiment, the positioning guide rod 3 and the limiting guide sleeve 4 are connected in a guiding and matching mode so as to realize the die assembly of the fixed die 2 and the movable die 1.

The working flow of the utility model is as follows: when the injection molding raw materials are injected into the main runner 6 from the injection runner 5, the injection molding raw materials flow into the mold cavities 8 through the main runner 6 and the inclined sub-runners 7 in sequence, so that injection molding processing is realized, after cooling molding, a lens injection molding part is formed in the mold cavity 8, injection molding waste is formed in the main runner 6, and connecting ribs are formed in the inclined sub-runners 7, the ejector plate 14 is driven to ascend by the aid of the ejector motor through the telescopic rods in cooperation with a peripheral ejection motor and telescopic rods, the cutter 15 cuts into the inclined sub-runners 7 upwards, the connecting ribs are cut away from the lens injection molding part, and independent lens injection molding parts, independent connecting ribs and independent injection molding waste are obtained.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (5)

1. The utility model provides a lens injection mold with decide structure, includes movable mould, cover half and sets up in the die cavity at cover half top, and the top central point department of movable mould is provided with annotates the material passageway, its characterized in that, the die cavity is equipped with 4, 4 the die cavity is rectangular array and distributes, the top of cover half still is equipped with the sprue that is circular form and 4 slope branch runners, the position of sprue is corresponding with annotating the position of material passageway, the week side of sprue is 4 slope branch runners that the annular array distributes, every one side that the sprue kept away from the sprue is linked together with the die cavity, every the lower extreme of slope branch runner is located adjacent die cavity setting, every two decide the hole have been seted up respectively to the bottom surface both sides of slope branch runner, the bottom of mould corresponds the position of deciding the hole and has been seted up and dodged the groove, every first ejecting hole has been seted up at the bottom surface middle part of slope branch runner, every the bottom surface middle part of sprue is equipped with the third ejecting hole, the inside cutting die, the first ejecting hole and the third and the last ejector plate of cutting plate are equipped with the first and the ejecting hole, and the first and the second and the third and the last ejector plate and the ejecting hole and the ejector plate and the first and the third and the ejector plate and have the ejecting hole.

2. The lens injection mold with the cutting structure according to claim 1, wherein a slot penetrating through the fixed mold is formed in the bottom of the stripping cavity.

3. The lens injection mold with the cutting structure according to claim 1, wherein the delayed ejection structure comprises an ejection block, an ejection rod, a spring and a base, the upper end of the ejection rod is fixedly connected with the ejection block, the lower end of the ejection rod is fixedly connected with the base, the spring is sleeved on the ejection rod, the upper end of the spring is fixedly connected with the top wall of the inner side of the stripping cavity, and the lower end of the spring is fixedly connected with the upper surface of the base.

4. The lens injection mold with cutting structure according to claim 3, wherein the inner side walls of the first ejection hole, the second ejection hole and the third ejection hole are respectively provided with a stop block for stopping the ejection block from falling down, the top parts of the ejection blocks are respectively positioned on the same plane with the bottom surface of the end face, and the bottom parts of the ejection blocks are abutted against the stop blocks.

5. The lens injection mold with the cutting structure according to claim 1, wherein positioning guide rods are fixedly arranged at four corners of the bottom surface of the movable mold, a limiting guide sleeve is embedded at the top surface of the fixed mold corresponding to the positioning guide rods, and the positioning guide rods are in guiding fit connection with the limiting guide sleeve.