CN210132726U - Injection mold of plastic washer and plastic washer - Google Patents

Abstract

The utility model discloses an injection mold and plastic packing ring of plastic packing ring, plastic packing ring's injection mold has last mould, lower mould and die cavity, the lower mould setting is relative with last mould in the below of last mould, the die cavity is located between mould and the lower mould, wherein go up mould or lower mould and have runner and two and advance the runner, the runner communicates with two advances the runner, and two advance the relative both sides and the die cavity intercommunication that the runner is located the die cavity respectively, when shaping plastic packing ring, can advance to water the raw materials toward the die cavity from two relative directions simultaneously, make the raw materials can evenly fill the die cavity fast, and then the utility model discloses an injection mold of plastic packing ring can the shaping go out width uniformity height, the plastic packing ring that the deformation volume is little, so, the utility model discloses a plastic packing ring can reduce the camera lens cost when guaranteeing the imaging performance of camera lens, satisfies the market demand.

Description

Injection mold of plastic washer and plastic washer

Technical Field

The utility model relates to a plastic packing ring manufacturing and designing field especially relates to an injection mold and plastic packing ring of plastic packing ring.

Background

Gaskets are required to be arranged among a plurality of lenses of the lens so as to keep the optical intervals among the lenses and keep the consistency of optical axes at the same time, and thus good image quality is ensured. At present, plastic gaskets are applied to the production of various lenses, and have wide market demands.

The plastic gasket is formed by injection molding of an injection mold, however, the existing injection mold for molding the plastic gasket only has one inlet gate (as shown in figure 1), when the existing injection mold is used for producing the plastic gasket, raw materials are poured into a cavity from one inlet gate, the raw materials gradually flow to one side of the cavity far away from the inlet gate from one side of the cavity close to the inlet gate, and finally the cavity is filled with the raw materials, and then the width of the molded plastic gasket, close to the inlet gate, is poor in consistency with the width of the side far away from the inlet gate, so that the molded plastic gasket has deformation and has larger deviation with a design value, the deformation of partial products is 0.01mm and even larger, and the performances of the lens in aspects of resolving power, definition and the like are influenced. In order to ensure the imaging performance of the lens, manufacturers often use a metal gasket with higher cost to replace a plastic gasket, which leads to an increase in the cost of the lens.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an embodiment provides an injection mold and plastic packing ring of plastic packing ring to it is poor with the width uniformity of keeping away from one side of advancing the runner to solve one side width that current plastic packing ring is close to into the runner, leads to the camera lens performance to descend and problem with the cost-push.

In order to solve the technical problem, the utility model provides an injection mold of plastic packing ring, it includes mould, lower mould and die cavity, and the lower mould sets up in the below of last mould and relative with last mould, and the die cavity is located between mould and the lower mould, goes up to be provided with the runner in mould or the lower mould and advances the runner with two, and the runner communicates with two advance the runner to two advance the relative both sides and the die cavity intercommunication that the runner is located the die cavity respectively.

According to the utility model discloses an embodiment, the aforesaid is gone up the mould and is had first bush and last mould core, and first bush cover is established on the side of last mould core.

According to the utility model discloses an embodiment, above-mentioned lower mould has second bush and lower mould mold core, and the second bush cover is established on the side of lower mould mold core to relative with first bush, the lower mould mold core is relative with last mould mold core.

According to an embodiment of the present invention, the runner and the two inlet gates are disposed in the first bushing or the second bushing.

According to the utility model discloses an embodiment, above-mentioned lower mould mold core uses diamond lathe processing with last mould mold core.

According to the utility model discloses an embodiment, above-mentioned first bush is provided with the first burr convex part of preventing towards the surface of second bush, and the first burr convex part of preventing is located one side that first bush is close to the mould core, and the lower mould core is provided with the second burr convex part of preventing towards the surface of mould core, and the second burr convex part of preventing is located one side that the lower mould core is close to the second bush.

According to the utility model discloses an embodiment, the aforesaid is gone up the mould and is still including folding last mould template and the upper fixed plate of establishing, and the upper fixed plate is located one side that the mould template deviates from the lower mould, and first bush is worn to establish in last mould template.

According to the utility model discloses an embodiment, above-mentioned lower mould is still including folding lower mould template, lower mould backing plate and the bottom plate of establishing, and the lower mould backing plate is located between lower mould template and the bottom plate to lower mould template is relative with last mould template, and folds between lower mould backing plate and the bottom plate and be equipped with thimble board and lower thimble board, and the second bush is worn to establish in lower mould template, and the one end of lower mould mold core is located the second bush, and the other end runs through lower mould backing plate and last thimble board.

According to the utility model discloses an embodiment, be provided with mould core height adjustment spare between mould core and the upper fixed plate on the aforesaid, be provided with mould core adjustment spare under the lower mould between mould core and the lower thimble board.

The utility model provides an use foretell plastic washer's injection mold injection moulding's plastic washer.

The utility model discloses an in the embodiment, the utility model discloses an injection mold and plastic packing ring of plastic packing ring, plastic packing ring's injection mold is through set up two in its upper die or lower mould and advance the runner with the runner intercommunication, and make two advance the relative both sides that the runner is located the die cavity respectively, so, when shaping plastic packing ring, can advance to water the raw materials in the die cavity simultaneously by the both sides of die cavity to fill full die cavity fast evenly, obtain the plastic packing ring that the width is even, through the utility model discloses an injection mold shaping plastic packing ring deflection of plastic packing ring is little, can effectively improve the performance of the camera lens that uses the plastic spacer, reduces the manufacturing cost of camera lens.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and explain the same, and do not constitute an undue limitation on the invention. In the drawings:

FIG. 1 is a schematic view of a conventional injection mold for a plastic gasket;

fig. 2 is a schematic view of an injection mold for a plastic gasket according to the present invention;

FIG. 3 is an enlarged view of area A of FIG. 2;

fig. 4 is another schematic view of the injection mold for plastic gaskets of the present invention;

FIG. 5 is an enlarged view of area B of FIG. 4;

FIG. 6 is an enlarged view of area C of FIG. 4;

fig. 7 is an enlarged view of the area D in fig. 4.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiment is an embodiment of the present invention, not all embodiments. Based on this embodiment in the present invention, all other embodiments obtained by the ordinary skilled person in the art without creative work all belong to the protection scope of the present invention.

Please refer to fig. 2, fig. 3, fig. 4 and fig. 5, which are two schematic diagrams of an injection mold for a plastic gasket according to the present invention and enlarged views of an area a in fig. 2 and an area B in fig. 4. As shown in the drawings, in the present embodiment, the injection mold 1 for a plastic gasket includes an upper mold 11, a lower mold 13, and a cavity 15, the lower mold 13 is disposed below the upper mold 11 and opposite to the upper mold 11, and the cavity 15 is located between the upper mold 11 and the lower mold 13. Wherein, the upper mold 11 or the lower mold 13 is provided with a runner a and two gates b communicated with the runner a, the two gates b are respectively communicated with the cavity 15 and are positioned at two opposite sides of the cavity 15 (as shown in fig. 3), so that when in injection molding, the two gates b can simultaneously feed the raw materials into the cavity 15, and the cavity 15 is filled more quickly. Because the raw materials are poured into the cavity 15 from the two opposite pouring gates b at the same time, and the pouring speeds of the two pouring gates are the same, the cavity 15 can be uniformly filled, and the plastic gasket with small deformation and high width consistency is formed.

In this embodiment, the upper mold 11 includes an upper mold plate 110, an upper fixing plate 111, and an upper mold core 112, the upper mold plate 110 is disposed above the lower mold 13 and faces the lower mold 13, the upper fixing plate 111 is disposed above the upper mold plate 110, and the upper mold core 112 penetrates the upper mold plate 110, has one end connected to the upper fixing plate 111 and the other end facing the lower mold 13, and has a partial cavity 15 on an end surface facing the lower mold 13.

Specifically, in the present embodiment, the upper die 11 further includes a first bushing 113, the first bushing 113 is embedded in the upper die plate 110 and penetrates the upper die plate 110 to be opposite to the lower die 13, and one end of the upper die core 112 close to the lower die 13 is located in the first bushing 113. In other words, the first bushing 113 has an upper mold core hole provided therein, and the upper mold core 112 is inserted into the upper mold core hole. The end surface of the first bushing 113 facing the lower die 13 also has a partial cavity 15, that is, the end surface of the first bushing 113 facing the lower die 13 and the end surface of the upper die core 112 facing the lower die 13 together form a part of the cavity 15 located on the upper die 11. Similarly, the upper mold core 112 may be provided with a vent hole, so that when the plastic gasket is formed, the gas in the cavity 15 can be discharged in time, thereby ensuring the quality of the formed plastic gasket.

The lower die 13 includes a lower die plate 130, a lower die pad 131, a lower fixing plate 132 and a lower die core 133, the lower die plate 130, the lower die pad 131 and the lower fixing plate 132 are stacked, the lower die pad 131 is located between the lower die plate 130 and the lower fixing plate 132, the lower die plate 130 is located on one side close to the upper die 11 and opposite to the upper die plate 110, one end of the lower die core 133 penetrates through the lower die plate 130 and opposite to the upper die core 112, and the other end penetrates through the lower die pad 131 and extends downward and vertically. The lower mold core 133 also has a partial cavity 15 on its end face facing the upper mold 11.

Specifically, the lower die 13 further includes an upper ejector plate 134, a lower ejector plate 135 and a plurality of pins 136 disposed between the lower die backing plate 131 and the lower fixing plate 132, wherein the upper ejector plate 134 is disposed on the lower ejector plate 135, the lower ejector plate 135 is disposed on the lower fixing plate 132, and the pins 136 are disposed on both sides of the stacked upper ejector plate 134 and lower ejector plate 135 and have a height greater than a stacked height of the upper ejector plate 134 and the lower ejector plate 135, so that a gap is formed between the upper ejector plate 134 and the lower die backing plate 132. One end of the lower mold core 133 extending downward is provided on the lower ejector plate 135 through the upper ejector plate 134. Thus, after the plastic washer is molded and the upper mold 11 and the lower mold 13 are opened, the lower mold core 133 can be driven to move upwards by the upper ejector plate 134 and the lower ejector plate 135, so that the molded plastic washer can be ejected.

More specifically, the lower die 13 of the present embodiment further includes a second bushing 137, and the second bushing 137 is inserted into the lower die plate 130, penetrates the lower die plate 130, and faces the first bushing 113. One end of the lower mold core 133 near the upper mold 11 is located in a second bushing 137 so as to be opposed to the upper mold core 112. Similarly, the end surface of the second bushing 137 facing the upper mold 11 and the end surface of the lower mold core 133 facing the upper mold 11 together form a portion of the cavity 15 located in the lower mold 13, and when the upper mold 11 and the lower mold 13 are closed, the portion located in the upper mold 11 and the portion located in the lower mold 13 form the complete cavity 15. In addition, an exhaust hole may be optionally formed in the lower mold core 133, so that gas in the cavity 15 can be exhausted in time when the plastic gasket is molded, thereby ensuring the quality of the molded plastic gasket.

In this embodiment, the flow channel a and the two glue inlets b may be disposed in the first bushing 113 or the second bushing 137, and the first bushing 113 and the second bushing 137 may be one-stage or multi-stage, and may have a square, circular or other shape. The arrangement of the first bushing 113 and the second bushing 137 can improve the compatibility of the injection mold 1 of the plastic gasket of the embodiment, and when the specifications or shapes of the plastic gaskets to be molded are different, only the corresponding first bushing 113, the corresponding second bushing 137 and the corresponding accessories need to be replaced, so that the whole set of mold is not redesigned, the time for mold development is shortened, and the development cost is also reduced.

Continuing to refer to fig. 6 and 7, enlarged views of regions C and D of fig. 4 are shown. As shown in the drawings, an upper mold core height adjuster 114 is further disposed between the upper mold core 112 and the upper fixing plate 111, and the thickness of the upper mold core height adjuster 114 can be set as required, so as to flexibly adjust the gap between the upper mold core 112 and the lower mold core 133 when the upper mold 11 and the lower mold 13 are closed, and further adjust the thickness of the formed plastic gasket. The upper mold core 112 and the upper mold core height adjusting part 114 are connected through a locking screw penetrating through the upper fixing plate 111, so that quick adjustment and replacement can be realized, and the upper mold core height adjusting part 114 can be a gasket.

Further, a lower mold core fixing piece 138 and a lower mold core height adjusting piece 139 are arranged between the lower mold core 133 and the lower ejector plate 135, the lower mold core fixing piece 138 is arranged on the lower mold core height adjusting piece 139, and the thickness of the lower mold core height adjusting piece 139 can be set as required, so that when the upper mold 11 and the lower mold 13 are closed, the upper mold core height adjusting piece 114 is matched to adjust the gap between the lower mold core 133 and the upper mold core 112, and further adjust the thickness of the formed plastic gasket. Wherein the lower die core 133, the lower die core fixing piece 138 and the lower die core height adjusting piece 139 are connected through a locking screw arranged on the lower ejector plate 135, so that rapid adjustment and replacement can be realized, and both the lower die core fixing piece 138 and the lower die core height adjusting piece 139 can be gaskets.

Referring to fig. 1 and 5, as shown in the drawings, a first burr-proof protrusion 1130 is disposed on a surface of the first bushing 113 facing the second bushing 137, the first burr-proof protrusion 1130 is located on a side of the first bushing 113 close to the upper mold core 112, in other words, the first burr-proof protrusion 1130 is located on a side where the upper mold core 112 is matched with the first bushing 113, and a height of the first burr-proof protrusion 1130 is greater than a height of the first bearing plane 1131 of the gasket, so that a step is formed at a matching position of the upper mold core 112 and the first bushing 113, and when the plastic gasket is molded, burrs are generated at the matching position of the upper mold core 112 and the first bushing 113, thereby preventing influence on a flatness of an assembled lens when the lens is assembled.

Similarly, lower mould mold core 133 is provided with the second and prevents deckle edge convex part 1330 towards the surface of last mould mold core 112, the second prevents deckle edge convex part 1330 and is located one side that lower mould mold core 133 is close to second bush 137, the second prevents that deckle edge convex part 1330 is located lower mould mold core 133 and second bush 137 matched with one side promptly, and the height that the second prevents deckle edge convex part 1330 is greater than the height that the gasket second held plane 1331, form the segment difference with the cooperation department at lower mould mold core 133 and second bush 137, prevent when the shaping plastic gasket, lower mould mold core 133 produces deckle edge with the cooperation department of second bush 137, and then avoid influencing the plane degree of the lens after the camera lens assembly is accomplished.

Preferably, the upper mold core 112 and the lower mold core 133 of the present embodiment are machined by a diamond lathe to further ensure the flatness of the end surfaces of the upper mold core 112 and the lower mold core 133 corresponding to each other, and further, a plastic gasket having high flatness is molded to ensure the flatness of the lens after the lens assembly is completed.

Referring to fig. 2 again, as shown in the drawings, the injection mold 1 of the plastic gasket of the present embodiment is a multi-cavity mold, and includes a plurality of upper mold cores 112, and a first bushing 113 and an upper mold core height adjusting member 114 that are matched with the upper mold cores 112, and correspondingly, a plurality of lower mold cores 133, and a plurality of second bushings 137, a lower mold core fixing member 138, and a lower mold core height adjusting member 139 that are matched with the lower mold cores 133, so that the raw material can be poured into the plurality of cavities 15 through the squirt nozzle and the plurality of flow channels a communicated with the squirt nozzle, thereby forming a plurality of plastic gaskets with high uniformity of width, high flatness, and no burrs at one time. The plastic gasket molded by the injection mold 1 of the plastic gasket of the embodiment can control the deformation of the plastic gasket within the range of 0.002mm-0.003mm, and further can replace a metal gasket on the basis of ensuring the imaging performance of a lens, thereby reducing the cost of the lens. Of course, the injection mold 1 for plastic gaskets of the present embodiment also has precise guide posts for ensuring the mold opening and closing precision, and will not be described in detail herein.

To sum up, the utility model provides a pair of injection mold and plastic packing ring of plastic packing ring is provided with two in the last mould of plastic packing ring's injection mold or the lower mould and advances the runner, advances the relative both sides and the die cavity intercommunication that the runner is located the die cavity respectively for two to when shaping plastic packing ring, can advance to water the raw materials in to the die cavity from two relative directions, make the raw materials can evenly fill fast, and then the utility model discloses an injection mold of plastic packing ring can the shaping go out the width uniformity height, the plastic packing ring that the deformation volume is little, uses the utility model discloses a plastic packing ring can not only ensure the imaging performance of camera lens, can also reduce the camera lens cost, satisfies the market demand.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides an injection mold of plastic gasket which characterized in that includes:

an upper die;

the lower die is arranged below the upper die and is opposite to the upper die;

a cavity located between the upper die and the lower die;

the upper die or the lower die is provided with a runner and two inlet gates, the runner is communicated with the two inlet gates, and the two inlet gates are respectively positioned on two opposite sides of the cavity and communicated with the cavity.

2. The injection mold for a plastic gasket as claimed in claim 1, wherein the upper mold has a first bushing and an upper mold core, the first bushing being fitted over a side surface of the upper mold core.

3. The injection mold for a plastic gasket as claimed in claim 2, wherein the lower mold has a second bushing and a lower mold core, the second bushing is fitted over a side surface of the lower mold core opposite to the first bushing, and the lower mold core is opposite to the upper mold core.

4. The injection mold for a plastic gasket as claimed in claim 3, wherein the runner and the two in-gates are provided in the first bushing or the second bushing.

5. The injection mold for a plastic gasket as claimed in claim 3, wherein the lower mold core and the upper mold core are machined using a diamond lathe.

6. The injection mold for plastic washers of claim 3, wherein the first bushing is provided with a first burr prevention protrusion on a surface facing the second bushing, the first burr prevention protrusion being located on a side of the first bushing close to the upper mold core, the lower mold core being provided with a second burr prevention protrusion on a surface facing the upper mold core, the second burr prevention protrusion being located on a side of the lower mold core close to the second bushing.

7. The injection mold for plastic gaskets as claimed in claim 4, wherein the upper mold further comprises an upper mold plate and an upper fixing plate stacked together, the upper fixing plate is located on a side of the upper mold plate facing away from the lower mold, and the first bushing is inserted into the upper mold plate.

8. The injection mold for plastic gaskets as claimed in claim 7, wherein the lower mold further comprises a lower mold plate, a lower mold base plate and a lower fixing plate, the lower mold base plate is disposed between the lower mold plate and the lower fixing plate, the lower mold plate is opposite to the upper mold plate, an upper ejector plate and a lower ejector plate are stacked between the lower mold base plate and the lower fixing plate, the second bushing is inserted into the lower mold plate, one end of the lower mold core is disposed in the second bushing, and the other end of the lower mold core penetrates through the lower mold base plate and the upper ejector plate.

9. The injection mold for a plastic gasket as claimed in claim 8, wherein an upper mold core height adjuster is provided between the upper mold core and the upper fixing plate, and a lower mold core adjuster is provided between the lower mold core and the lower ejector plate.

10. A plastic gasket injection-molded using the injection mold for a plastic gasket according to any one of claims 1 to 9.

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