CN212045729U - Injection mold with prevent ejecting structure of indenture - Google Patents
Injection mold with prevent ejecting structure of indenture Download PDFInfo
- Publication number
- CN212045729U CN212045729U CN202020187752.4U CN202020187752U CN212045729U CN 212045729 U CN212045729 U CN 212045729U CN 202020187752 U CN202020187752 U CN 202020187752U CN 212045729 U CN212045729 U CN 212045729U
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- Prior art keywords
- injection molding
- plate
- groove
- lower die
- injection
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- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 238000001746 injection moulding Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 description 16
- 239000004033 plastic Substances 0.000 description 16
- 238000000465 moulding Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
Images
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model provides an injection mold with an anti-dent ejection structure, which comprises an upper padding plate, an upper template, a lower template and a lower padding plate, wherein the bottom of the lower template is provided with an upper mold cavity, and an injection molding main runner is arranged in the upper template; the lower die plate is provided with lower die cavities, injection molding sub-runners are connected among the lower die cavities, one end, away from the injection molding sub-runners, of each lower die cavity is connected with an auxiliary ejection groove, a first water gap groove is also connected between each injection molding sub-runner and the corresponding lower die cavity, a second water gap groove is also connected between each auxiliary ejection groove and the corresponding lower die cavity, the bottoms of the injection molding sub-runners are connected with first stripping holes, and the bottoms of the auxiliary ejection grooves are connected with second stripping holes; supporting blocks are connected between the lower die plate and the lower backing plate, a top plate is surrounded between the supporting blocks, and a first ejector pin and a second ejector pin are fixed on the top plate. The utility model discloses can effectively avoid the surface of injection molding to form defects such as indenture, and take off material ejecting action reliable and stable, the mouth of a river groove damages the injection molding when can avoiding cutting the separation.
Description
Technical Field
The utility model relates to an injection mold specifically discloses an injection mold with prevent ejecting structure of indenture.
Background
The injection mold is a tool for producing plastic products, which is formed by an upper mold, a lower mold and an auxiliary molding system, is also called as a plastic mold, and can be used for processing a series of plastic products with different shapes and sizes.
Injection mold can be used for producing various injection molding, among the prior art, injection mold generally can include ejection mechanism, ejection mechanism sets up the bottom at the die cavity of moulding plastics, pass the lower mould through the thimble and support at the bottom of the chamber in the die cavity of moulding plastics, after the injection moulding die sinking, it is ejecting with the injection molding in the die cavity of moulding plastics through the thimble, and convenient for operation, but this kind of ejection mechanism can make the plastic part form defects such as indenture, influence the outward appearance of plastic part, when being used for producing optical lens piece, defects such as surface indenture can seriously influence optical lens piece's performance.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an injection mold with an anti-dent ejection structure for solving the problems in the prior art, which can effectively avoid the defects of dents formed on the surface of an injection molding part and the like, and has stable material stripping and ejection actions.
In order to solve the prior art problem, the utility model discloses an injection mold with an anti-dent ejection structure, which comprises an upper backing plate, an upper template, a lower template and a lower backing plate, wherein the bottom of the lower template is provided with n upper mold cavities, n is an integer greater than 1, and an injection molding main runner is arranged in the upper template;
the lower die plate is provided with n lower die cavities, an injection molding sub-runner with the depth of P is connected between each lower die cavity, the injection molding main runner is positioned above the injection molding sub-runner, one end of the lower die cavity, far away from the injection molding sub-runner, is connected with an auxiliary ejection groove with the depth of Q, a first water gap groove with the depth of D is also connected between the injection molding sub-runner and the lower die cavity, a second water gap groove with the depth of D is also connected between the auxiliary ejection groove and the lower die cavity, P > D and Q > D are also connected, the bottom of the injection molding sub-runner is connected with a first stripping hole, and the bottom of the auxiliary ejection groove is connected with a second stripping hole;
at least two supporting blocks are connected between the lower die plate and the lower backing plate, a top plate is surrounded between the supporting blocks, n first ejector pins and n second ejector pins are fixed on the top plate, the first ejector pins are slidably connected in the first stripping holes, and the second ejector pins are slidably connected in the second stripping holes.
Furthermore, one end of the auxiliary ejecting groove, which is far away from the lower die cavity, is connected with an exhaust groove.
Further, the depth of the exhaust groove is D, D > D.
Furthermore, a material ejecting and yielding hole is formed in the lower base plate, a material ejecting block is fixed at the bottom of the top plate, and the material ejecting block is connected to the material ejecting and yielding hole in a sliding mode.
Further, a spring is connected between the top plate and the lower template.
The utility model has the advantages that: the utility model discloses an injection mold with prevent ejecting structure of indenture, be provided with the enough big subchannel and the supplementary groove of ejecting of moulding plastics of the degree of depth at the both ends of the die cavity of moulding plastics, when ejecting, the thrust of thimble acts on the splice bar in subchannel and the supplementary groove of ejecting of moulding plastics, can effectively avoid the surface of injection molding to form defects such as indenture, and take off the ejecting action of material reliable and stable, furthermore, the subchannel and the supplementary groove of moulding plastics are connected with the mouth of a river groove respectively between the die cavity of moulding plastics, can effectively make things convenient for separation injection molding and mouth of a river muscle, damage the injection molding when avoiding cutting the separation, when being used for producing optical lens, the position of cutting of edge all around can not cause the influence to optical lens's performance almost.
Drawings
Fig. 1 is a schematic structural diagram of the die assembly of the present invention.
Fig. 2 is a schematic structural view of the utility model during mold opening.
Fig. 3 is an enlarged schematic structural diagram of a in fig. 1 according to the present invention.
The reference signs are: the injection molding device comprises an upper base plate 10, an upper die plate 11, an upper die cavity 12, an injection molding main runner 13, a lower base plate 20, an ejection abdicating hole 201, a lower die plate 21, a lower die cavity 22, a second water gap groove 221, a second water gap groove 222, an injection molding sub-runner 23, a first stripping hole 231, an auxiliary ejection groove 24, a second stripping hole 241, an exhaust groove 242, a support plate 25, a top plate 30, a first ejector pin 31, a second ejector pin 32, an ejector block 33 and a spring 34.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 to 3.
The embodiment of the utility model discloses an injection mold with prevent dent ejection structure, include from last to setting gradually upper padding plate 10, cope match-plate pattern 11, lower bolster 21 and lower bolster 20 down, the bottom of lower bolster 21 is equipped with n upper die cavity 12, n is the integer that is greater than 1, is equipped with the injection molding sprue 13 in the cope match-plate pattern 11;
n lower die cavities 22 are arranged on the lower die plate 21, all the lower die cavities 22 are respectively positioned under the upper die cavities 12, injection sub-runners 23 with the depth of P are connected between the lower die cavities 22, the injection main runner 13 is positioned above the injection sub-runners 23, one end, far away from the injection sub-runners 23, of each lower die cavity 22 is connected with an auxiliary ejection groove 24 with the depth of Q, a first water port groove 221 with the depth of D is further connected between the injection sub-runners 23 and the lower die cavities 22, a second water port groove 222 with the depth of D is further connected between the auxiliary ejection groove 24 and the lower die cavities 22, P > D and Q > D, the bottom of each injection sub-runner 23 is connected with a first stripping hole 231 penetrating through the lower die plate 21, the bottom of each auxiliary ejection groove 24 is connected with a second stripping hole 241 penetrating through the lower die plate 21, the thickness of the molten plastic forming connecting ribs in the injection sub-runners 23 and the auxiliary ejection grooves 24 is larger than that of the first water port groove 221 and the second water port groove 222 The thickness of the gate rib can ensure that the connecting rib in the injection molding sub-runner 23 and the auxiliary ejection groove 24 can effectively bear the ejection acting force of the first ejector pin 31 and the second ejector pin 32, the stability of ejection action is improved, the first ejector pin 31 and the second ejector pin 32 can not be in direct contact with the injection molding piece, the bad defects that dents and the like are formed on the surface of the injection molding piece in the injection molding process or the stripping ejection process can be effectively avoided, in addition, the thickness of the gate rib is small, the resistance borne by a cutter in the process of cutting a gate can be effectively reduced, the stability of cutting the gate can be effectively improved, and the injection molding piece, such as an optical lens, is prevented from being damaged in the;
at least two supporting blocks 25 are fixedly connected between the lower template 21 and the lower backing plate 20, a top plate 30 is enclosed between the supporting blocks 25, n first ejector pins 31 and n second ejector pins 32 are fixed on the top plate 30, the first ejector pins 31 are slidably connected in the first stripping holes 231, and the second ejector pins 32 are slidably connected in the second stripping holes 241.
When the mold is closed and injection is carried out, an injection molding cavity is formed by the upper mold cavity 12 and the lower mold cavity 22, molten plastic is injected into the injection molding sub-channel 23, the first water notch, the injection molding cavity, the second water notch 222 and the auxiliary ejection groove 24 through the injection molding main channel 13, after cooling forming, the mold is opened, the top plate 30 is pushed to move upwards through an external ejection power mechanism, the first ejector pin 31 and the second ejector pin 32 rise, connecting ribs in the injection molding sub-channel 23 and the auxiliary ejection groove 24 are respectively ejected, and stripping is finished.
In this embodiment, the end of each auxiliary ejecting groove 24 away from the lower mold cavity 22 is connected to an exhaust groove 242, and the exhaust groove 242 can effectively stabilize the air pressure in the injection mold cavity during injection molding, so as to ensure that the injection mold cavity can be smoothly filled with molten plastic, and avoid the undesirable defects that the finally obtained injection molding member forms bubbles and the like.
According to the above embodiment, the depth of the air discharge groove 242 is D, D > D, and preferably, D is 0.2 to 0.5mm, so that the material overflow can be prevented while ensuring the air discharge function of the air discharge groove 242.
In this embodiment, be equipped with liftout hole 201 of stepping down in the lower bolster 20, the bottom of roof 30 is fixed with ejector block 33, and ejector block 33 sliding connection is in liftout hole 201 of stepping down, can effectively avoid roof 30 lift in-process to take place the skew, can effectively improve the stationarity of taking off the material action.
In the present embodiment, the spring 34 is connected between the top plate 30 and the lower die plate 21, and the stability of the ejecting operation can be further improved by the spring 34.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. An injection mold with an anti-dent ejection structure comprises an upper backing plate (10), an upper mold plate (11), a lower mold plate (21) and a lower backing plate (20), and is characterized in that n upper mold cavities (12) are arranged at the bottom of the lower mold plate (21), n is an integer greater than 1, and an injection molding main runner (13) is arranged in the upper mold plate (11);
the injection molding device is characterized in that n lower mold cavities (22) are arranged on the lower mold plate (21), an injection molding sub-runner (23) with the depth of P is connected between the lower mold cavities (22), the injection molding main runner (13) is positioned above the injection molding sub-runner (23), one end, far away from the injection molding sub-runner (23), of each lower mold cavity (22) is connected with an auxiliary ejection groove (24) with the depth of Q, a first water port groove (221) with the depth of D is connected between the injection molding sub-runner (23) and the lower mold cavity (22), a second water port groove (222) with the depth of D is connected between the auxiliary ejection groove (24) and the lower mold cavity (22), P > D, Q > D, the bottom of the injection molding sub-runner (23) is connected with a first stripping hole (231), and the bottom of the auxiliary ejection groove (24) is connected with a second stripping hole (241);
at least two supporting blocks (25) are connected between the lower template (21) and the lower cushion plate (20), a top plate (30) is enclosed between the supporting blocks (25), n first ejector pins (31) and n second ejector pins (32) are fixed on the top plate (30), the first ejector pins (31) are slidably connected into the first stripping holes (231), and the second ejector pins (32) are slidably connected into the second stripping holes (241).
2. An injection mold with dent ejection prevention structure according to claim 1, wherein the auxiliary ejection groove (24) is connected with a vent groove (242) at the end far away from the lower mold cavity (22).
3. An injection mold with an anti-dent ejection structure according to claim 2, wherein the depth of the vent groove (242) is D, D > D.
4. An injection mold with an anti-dent ejection structure according to claim 1, wherein the lower backing plate (20) is provided with an ejecting abdicating hole (201), the bottom of the top plate (30) is fixed with an ejecting block (33), and the ejecting block (33) is slidably connected in the ejecting abdicating hole (201).
5. An injection mold with an anti-dent ejection structure according to claim 1, wherein a spring (34) is connected between the top plate (30) and the lower mold plate (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020187752.4U CN212045729U (en) | 2020-02-20 | 2020-02-20 | Injection mold with prevent ejecting structure of indenture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020187752.4U CN212045729U (en) | 2020-02-20 | 2020-02-20 | Injection mold with prevent ejecting structure of indenture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212045729U true CN212045729U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020187752.4U Expired - Fee Related CN212045729U (en) | 2020-02-20 | 2020-02-20 | Injection mold with prevent ejecting structure of indenture |
Country Status (1)
| Country | Link |
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| CN (1) | CN212045729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334696A (en) * | 2021-06-22 | 2021-09-03 | 东风汽车集团股份有限公司 | Injection mold for strip-shaped plastic product and processing method |
-
2020
- 2020-02-20 CN CN202020187752.4U patent/CN212045729U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334696A (en) * | 2021-06-22 | 2021-09-03 | 东风汽车集团股份有限公司 | Injection mold for strip-shaped plastic product and processing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |