CN115972510A - Injection mould - Google Patents
Injection mould Download PDFInfo
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- CN115972510A CN115972510A CN202310076507.4A CN202310076507A CN115972510A CN 115972510 A CN115972510 A CN 115972510A CN 202310076507 A CN202310076507 A CN 202310076507A CN 115972510 A CN115972510 A CN 115972510A
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- groove
- parting surface
- cavity
- die
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Abstract
The invention provides an injection mold, which comprises a front mold and a rear mold, wherein the front mold is provided with a front parting surface, and a cavity groove is formed in the front parting surface; the rear die and the front die can be close to or far away from each other, the rear die is provided with a rear parting surface opposite to the front parting surface, and the rear parting surface is attached to the front parting surface to close the groove of the cavity to form a forming cavity; the front parting surface and the rear parting surface are provided with a clearance, and the clearance is communicated with the opening of the cavity groove and is arranged around the cavity groove. The technical scheme of this application can avoid the product to lean on the strain problem that produces that hinders and produce because of the crushing that the broken cause of injection mold compound die.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to an injection mold.
Background
The injection mold is a tool for producing plastic products, and comprises a front mold and a rear mold which can be opened and closed, wherein after the rear mold and the front mold are closed, a product cavity consistent with the structure of a product is formed between the rear mold and the front mold. And the die joint that front mould and back mould laminated each other all has certain roughness, similar sawtooth or wave shape under the microcosmic, just can extrude when current back mould compound die is leaned on brokenly and make and produce the bruise swelling point at the die cavity at the die joint opening part, when carrying out the product drawing of patterns from the die cavity opening this moment, just can lead to the product surface to pull at the die cavity opening part and hinder, especially to some mirror surface products, the drawback of pulling is comparatively obvious.
Disclosure of Invention
The invention mainly aims to provide an injection mold, aiming at avoiding the problem of pulling caused by pressure damage caused by closing and breaking of the injection mold.
In order to achieve the above object, the present invention provides an injection mold, comprising:
the front die is provided with a front parting surface, and the front parting surface is provided with a cavity groove; and
the rear die and the front die can be close to or far away from each other, the rear die is provided with a rear parting surface opposite to the front parting surface, and the rear parting surface is attached to the front parting surface to close the cavity groove to form a forming cavity;
the front parting surface and the rear parting surface are provided with a clearance, and the clearance is communicated with the opening of the cavity groove and is arranged around the cavity groove.
In an embodiment of the present application, the clearance has a rectangular cross section.
In an embodiment of the application, the depth h of the clearance in the depth direction of the cavity groove satisfies that h is not less than 0.0035mm and not more than 0.0065mm.
In an embodiment of the application, the width d of the clearance in the width direction of the cavity groove satisfies that d is greater than or equal to 0.5mm and less than or equal to 1mm.
In an embodiment of the present application, the clearance is provided at the front parting surface.
In an embodiment of the present application, the clearance is provided at the rear parting surface.
In an embodiment of the application, the front parting surface is provided with a first avoiding groove, and the first avoiding groove is circumferentially arranged along the peripheral side of the cavity groove and is communicated with the cavity groove;
the second is kept away the position groove after the die joint has been seted up, the second is kept away the position groove and is followed the week side of die cavity recess is encircleed and is set up, and with the first groove relative setting of keeping away, in order with the first groove of keeping away encloses to close and forms keep away the sky.
In one embodiment of the application, the roughness of the front parting surface satisfies Ra ≤ 0.3 μm, rz ≤ 3 μm;
and/or the roughness of the rear parting surface meets the conditions that Ra is less than or equal to 0.3 mu m and Rz is less than or equal to 3 mu m.
In an embodiment of the application, a forming protrusion is convexly arranged on the rear parting surface, and the forming protrusion is inserted into the cavity groove and is arranged at an interval with the groove wall of the cavity groove to form the cavity when the front mold and the rear mold are closed.
In an embodiment of the application, the groove wall roughness of the cavity groove satisfies Ra is less than or equal to 0.3 μm, and Rz is less than or equal to 3 μm.
According to the technical scheme, the clearance arranged around the cavity is arranged between the front parting surface and the rear parting surface of the injection mold, so that the peripheral side of the opening of the cavity groove of the front parting surface is not extruded when the front mold and the rear mold are closed and broken, and the pressure injury caused by extrusion is avoided, so that the problem that the product is scratched when the product is demolded because a pressure injury swelling point is generated at the opening of the cavity groove is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a mold closing operation according to an embodiment of the present invention;
fig. 2 is a view showing a structure of the injection mold of fig. 1 when it is separated.
The reference numbers indicate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
33 | Forming |
| 10 | |
50 | Avoidance of |
| 11 | |
51 | First avoiding |
| 13 | |
53 | Second avoiding |
| 30 | |
200 | Product(s) |
| 31 | Rear parting plane |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides an injection mold 100.
Referring to fig. 1, in some embodiments of the injection mold 100 of the present application, the injection mold 100 includes:
the front die comprises a front die 10, wherein the front die 10 is provided with a front parting surface 11, and a cavity groove 13 is formed in the front parting surface 11; and
the rear die 30 and the front die 10 can approach or depart from each other, the rear die 30 is provided with a rear parting surface 31 opposite to the front parting surface 11, and the rear parting surface 31 is attached to the front parting surface 11 to close the cavity groove 13 to form a cavity;
a clearance 50 is arranged between the front parting surface 11 and the rear parting surface 31, and the clearance 50 is communicated with the opening of the cavity groove 13 and is arranged around the cavity groove 13.
Specifically, the injection mold 100 generally comprises two parts, namely a front mold 10 and a rear mold 30, which can be moved toward and away from each other, one of the front mold 10 and the rear mold 30 can be mounted on a movable mold plate of the injection molding apparatus to form a movable mold, the other of the front mold 10 and the rear mold 30 can be mounted on a fixed mold plate of the injection molding apparatus to form a fixed mold, the fixed mold is kept fixed, and the closing and opening of the injection mold 100 can be realized only by driving the movable mold to move toward and away from the fixed mold. During injection molding, the front mold 10 and the rear mold 30 are closed to form a pouring system and a cavity, and during mold opening, the front mold 10 and the rear mold 30 are separated to take out a plastic product. In this embodiment, the front mold 10 and the rear mold 30 have a front parting surface 11 and a rear parting surface 31 which can be attached to each other, wherein a cavity groove 13 for injection molding is provided on the front parting surface 11, when the front mold 10 and the rear mold 30 are closed, the front parting surface 11 and the rear parting surface 31 are attached to each other to seal the modified cavity groove 13 to form a cavity, and after the injection molding is completed and the product 200 is shaped, the front mold 10 and the rear mold 30 are separated, and the product 200 can be taken out from the cavity groove 13. Because the front parting surface 11 and the rear parting surface 31 both have certain roughness, no matter any process is adopted to polish the front parting surface 11 and the rear parting surface 31, the front parting surface 11 and the rear parting surface 31 are saw-toothed or wavy under microscopic observation, at the moment, when the front mold 10 and the rear mold 30 are closed, the front parting surface 11 and the rear parting surface 31 can be mutually extruded to cause crush injury of the saw-toothed or wavy, and a crush injury swelling point is more easily caused to bulge into the cavity groove 13 at the opening edge of the cavity groove 13, at the moment, when the product 200 is demoulded from the opening of the cavity groove 13, the surface of the product 200 can be strained at the opening of the cavity, and particularly, the strain defect is more obvious for some mirror surface products 200; in this embodiment, a clearance 50 arranged around the cavity is arranged between the front parting surface 11 and the rear parting surface 31, and the clearance 50 may be provided on the front parting surface 11, or may be provided on the rear parting surface 31, or may be provided on both the front parting surface 11 and the rear parting surface 31, which is not limited herein; the clearance 50 is positioned outside the opening of the cavity groove 13, is communicated with the opening of the cavity groove 13 and is arranged along the opening of the cavity groove 13 in a surrounding manner, so that when the front mold 10 and the rear mold 30 are closed, the opening edge of the cavity groove 13 cannot be extruded, and as can be understood, when the clearance 50 is arranged on the rear parting surface 31, the rear parting surface 31 cannot press the opening edge of the cavity groove 13, and the swelling point cannot be crushed; when the clearance 50 is arranged on the front parting surface 11, the opening edge of the cavity groove 13 has no position where the bulge point can be crushed, so that the product 200 can be prevented from being crushed when the bulge point exists at the opening of the cavity groove 13 and the product 200 is demoulded.
In addition, the clearance 50 can provide a clearance space for the cavity, for example, the clearance space can be used for exhausting when materials are injected into the cavity, so that the space of the cavity is completely filled with the materials, the product 200 with sufficient filling quality is ensured, and the product 200 is prevented from being deformed due to insufficient filling of the materials.
Therefore, it can be understood that, according to the technical solution of the present invention, the clearance 50 arranged around the cavity is arranged between the front parting surface 11 and the rear parting surface 31 of the injection mold 100, so that the opening peripheral side of the cavity groove 13 of the front parting surface 11 is not squeezed when the front mold 10 and the rear mold 30 are closed and broken, and no crush injury caused by squeezing exists, thereby avoiding the problem that the product 200 is scratched when the product 200 is demolded because a crush injury swelling point is generated at the opening of the cavity groove 13.
Referring to fig. 1, in some embodiments of the present application, the clearance 50 has a rectangular cross section.
It can be understood that in the technical solution of the foregoing embodiment, by providing the clearance 50 in the injection mold 100, it is possible to avoid that the surface of the product 200 is scratched when the product 200 is demolded due to the pressure scratch existing at the opening of the cavity groove 13. In this embodiment, the shape of the clearance 50 is rectangular, so that the clearance 50 is convenient to be formed, and the processing difficulty of the injection mold 100 is reduced.
Referring to fig. 1, in some embodiments of the present application, a depth h of the clearance 50 in the depth direction of the cavity groove 13 is satisfied, where h is greater than or equal to 0.0035mm and less than or equal to 0.0065mm.
It can be understood that, according to the technical solution of the present application, in order to avoid that the surface of the product 200 is scratched when the product 200 is demolded due to the pressure damage existing at the opening of the cavity groove 13, and in order to ensure that the clearance 50 indeed covers the opening edge of the cavity groove 13, the clearance 50 is communicated with the cavity groove 13 when the injection mold 100 is closed. In this embodiment, the depth h of the clearance 50 in the depth direction of the cavity groove 13 satisfies 0.0035mm ≤ h ≤ 0.0065mm, and at this time, h can be any value between 0.0035mm, 0.004mm, 0.0045mm, 0.005mm, 0.0055mm, 0.006mm, 0.0065mm, and 0.0035mm to 0.0065mm, which is not limited herein; if h is less than 0.0035mm, the depth of the clearance 50 is too small, the problem that the edge of the cavity groove 13 is pressed to damage a swelling point during mold closing still exists, and if h exceeds 0.0065mm, the problem that materials enter the clearance 50 space during injection molding possibly exists, so that the edge of the product 200 after being molded is abnormal in burrs and the like, secondary processing is needed after demolding, and the processing efficiency of the product 200 and the yield of the product 200 are affected. Make the degree of depth of keeping away empty 50 between 0.0035mm to 0.0065mm, can ensure to keep away empty 50 degree of depth and enough play better effect of keeping away, avoid having the crushing at die cavity recess 13 opening part, and avoid keeping away empty 50 degree of depth too deeply, generally speaking, the fuse-element of moulding plastics all has certain mobility, be less than 0.0065mm when keeping away empty 50 degree of depth, the fuse-element can't flow into in keeping away empty 50, thereby avoid product 200 edge to produce dysmorphism such as burr or arch, improve product 200's the yield of moulding plastics.
Referring to fig. 1, in some embodiments of the present application, a width d of the clearance 50 in the width direction of the cavity groove 13 is equal to or greater than 0.5mm and equal to or less than 1mm.
Similarly, in this embodiment, the width d of the clearance 50 in the width direction of the cavity groove 13 satisfies that d is not less than 0.5mm and not more than 1mm, and at this time, d may be any value between 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, and 0.5mm to 1mm, which is not limited herein; if the width of the clearance 50 is less than 0.5mm, the problem that the edge of the cavity groove 13 is crushed and swollen when the die is closed still exists; if the width of the clearance 50 is greater than 1mm, the too large width of the clearance 50 easily causes the problem that the material enters the space of the clearance 50 in the injection molding process, causes the abnormality such as burrs and the like at the edge of the molded product 200, causes the secondary processing after demolding, and affects the processing efficiency of the product 200 and the yield of the product 200. In this embodiment, the width of the clearance 50 is 0.5mm to 1mm, so as to ensure that the clearance 50 has a good clearance effect enough, and avoid the pressure injury at the opening of the cavity groove 13.
Referring to fig. 2, in some embodiments of the present application, the clearance 50 is opened at the front parting surface 11.
It can be understood that, in the technical solution of the present application, in order to avoid that the surface of the product 200 is scratched when the product 200 is demolded due to the pressure damage at the opening of the cavity groove 13, the clearance 50 arranged around the cavity is provided in the injection mold 100. In this embodiment, keep away empty 50 and offer preceding die joint 11 for keep away empty 50 and offer the outside of cavity recess 13, and communicate with cavity recess 13, so set up, the opening edge of cavity recess 13 does not have the position that can be extruded and produce the bruising swelling point, thereby can avoid the opening part of cavity recess 13 to have the bruising swelling point and result in the product 200 to weigh the product 200 when drawing of patterns.
Referring to fig. 2, in some embodiments of the present application, the clearance 50 is opened at the rear parting plane 31.
In this embodiment, keep away empty 50 and offer the aversion groove that forms the ring shape on back die joint 31, when front mould 10 and back mould 30 compound die, keep away the groove and just set up to die cavity open-ended edge, so set up, back die joint 31 just can not have the position that can oppress the opening edge of die cavity recess 13, just can not produce yet and lead to die cavity opening edge to produce and press and hinder the swelling point. In some embodiments, the clearance groove of the rear parting surface 31 may be opened to a certain distance from the inner side of the cavity opening, so as to avoid extrusion between the edge of the clearance groove and the edge of the cavity opening.
Referring to fig. 2, in some embodiments of the present application, the front parting surface 11 is provided with a first avoiding groove 51, and the first avoiding groove 51 is disposed around the periphery of the cavity groove 13 and is communicated with the cavity groove 13;
the back parting surface 31 is provided with a second avoiding groove 53, the second avoiding groove 53 is arranged around the periphery of the cavity groove 13 and is opposite to the first avoiding groove 51 so as to form the avoiding space 50 by enclosing with the first avoiding groove 51.
In this embodiment, set up first groove 51 and the second groove 53 of keeping away on preceding die joint 11 and back die joint 31 respectively, make first groove 51 and the second of keeping away keep away the groove 53 and all encircle the setting along the circumference of die cavity recess 13, and make first groove 51 and the second of keeping away keep away the groove 53 and dock each other and form aforementioned keeping away empty 50 when front mould 10 and back mould 30 compound die, so set up, make on preceding die joint 11 in the opening edge of die cavity recess 13 not have the structure that can be extruded and warp, and back die joint 31 can not extrude the opening border position of die cavity recess 13 yet, thereby can avoid the opening edge of die cavity recess 13 to be extruded effectively and produce the bruising point, and then pulled when avoiding the drawing of patterns of product 200 to hinder effectively.
In one embodiment of the application, the roughness of the front parting surface 11 satisfies Ra ≤ 0.3 μm, rz ≤ 3 μm;
and/or the roughness of the rear parting surface 31 satisfies Ra being less than or equal to 0.3 μm and Rz being less than or equal to 3 μm.
It can be understood, because preceding die joint 11 and back die joint 31 all have certain roughness, no matter adopt arbitrary technology to polish preceding die joint 11 and back die joint 31, preceding die joint 11 and back die joint 31 all present sawtooth pattern or wave pattern under the microcosmic observation, at this moment, when preceding mould 10 and back mould 30 compound die, preceding die joint 11 and back die joint 31 just can extrude each other and lead to sawtooth pattern or wave pattern to appear weighing wounded, and at the opening edge of die cavity recess 13, lead to more easily appearing weighing wounded and swelling point protruding to die cavity recess 13 in, at this moment, when carrying out the drawing of patterns of product 200 from the opening of die cavity recess 13, just can lead to the product 200 surface to weigh wounded at the die cavity opening part. In this embodiment, the roughness of the front parting surface 11 satisfies that Ra is less than or equal to 0.3 μm, rz is less than or equal to 3 μm, that is, the front parting surface 11 is smooth and flat as much as possible, the size of the saw teeth or the raised grains is reduced, and the risk of pressing and damaging the swollen point is reduced.
In addition, the roughness of the rear parting surface 31 satisfies that Ra is less than or equal to 0.3 μm, rz is less than or equal to 3 μm, so that the front parting surface 11 and the rear parting surface 31 can keep better smoothness and flatness, the front parting surface 11 and the rear parting surface 31 can be better attached when the front mold 10 and the rear mold 30 are closed, the risk of crushing and swelling points is reduced, and the injection molding quality of the product 200 is improved.
Referring to fig. 1, in some embodiments of the present application, a forming protrusion 33 is protruded from the rear parting surface 31, and when the front mold 10 and the rear mold 30 are closed, the forming protrusion 33 is inserted into the cavity groove 13 and spaced from a groove wall of the cavity groove 13 to form the cavity.
It will be appreciated that when the front and rear molds 30 are closed, a cavity is created for the injection molded product 200. In this embodiment, the rear parting surface 31 is convexly provided with a forming protrusion 33, when the front mold 10 and the rear mold 30 are closed, the forming protrusion 33 is inserted into the cavity groove 13 to surround with a groove wall of the cavity groove 13 to form a cavity, at this time, the forming protrusion 33 and the groove wall of the cavity groove 13 can be arranged according to the shape of the product 200 to be formed, so that the product 200 formed after injection molding is formed according to the shape of the cavity, and the product 200 is integrally injection molded.
In an embodiment of the present application, the groove wall roughness of the cavity groove 13 satisfies Ra ≤ 0.3 μm and Rz ≤ 3 μm.
It can be understood that the injection mold 100 provided by the present application is mainly used for injection molding of the plastic product 200, in this embodiment, the groove wall roughness of the cavity groove 13 satisfies that Ra is less than or equal to 0.3 μm, rz is less than or equal to 3 μm, at this time, the outer surface of the plastic product 200 formed by injection molding of the injection mold 100 of the present application has better smoothness, a surface effect similar to a mirror surface can be formed, and the injection molding quality of the product 200 is improved; at this moment, whether the surface of the product 200 has strain can be better seen, and the problem of pressure injury on the edge of the opening of the cavity is judged, so that the improvement can be made in time.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An injection mold, comprising:
the front die is provided with a front parting surface, and the front parting surface is provided with a cavity groove; and
the rear die and the front die can be close to or far away from each other, the rear die is provided with a rear parting surface opposite to the front parting surface, and the rear parting surface is attached to the front parting surface to close the cavity groove to form a forming cavity;
the front parting surface and the rear parting surface are provided with a clearance, and the clearance is communicated with the opening of the cavity groove and is arranged around the cavity groove.
2. An injection mould according to claim 1, characterised in that the relief is rectangular in cross-section.
3. An injection mold as claimed in claim 2, wherein the depth h of the relief from the cavity groove in the depth direction satisfies 0.0035mm ≤ h ≤ 0.0065mm.
4. An injection mold as claimed in claim 2, wherein the width d of the relief from the cavity groove in the width direction satisfies, d is 0.5mm ≤ d ≤ 1mm.
5. An injection mold as claimed in claim 1, wherein said clearance is open to said front parting plane.
6. An injection mold as claimed in claim 1, wherein said relief is provided in said back parting plane.
7. The injection mold of claim 1, wherein the front parting surface is provided with a first avoiding groove, and the first avoiding groove is circumferentially arranged along the peripheral side of the cavity groove and is communicated with the cavity groove;
the second is kept away the position groove after the die joint has been seted up, the second is kept away the position groove and is followed the week side of die cavity recess is encircleed and is set up, and with the first groove relative setting of keeping away, in order with the first groove of keeping away encloses to close and forms keep away the sky.
8. The injection mold according to claim 1, wherein the roughness of the front parting surface satisfies Ra ≦ 0.3 μm, rz ≦ 3 μm;
and/or the roughness of the rear parting surface meets the conditions that Ra is less than or equal to 0.3 mu m and Rz is less than or equal to 3 mu m.
9. The injection mold of claim 1, wherein the rear parting surface is convexly provided with a forming bulge, and the forming bulge is inserted into the cavity groove when the front mold and the rear mold are closed and is spaced from the groove wall of the cavity groove to form the cavity.
10. An injection mold according to any one of claims 1 to 9, wherein the groove wall roughness of the cavity groove satisfies Ra ≦ 0.3 μm and Rz ≦ 3 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310076507.4A CN115972510A (en) | 2023-01-28 | 2023-01-28 | Injection mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310076507.4A CN115972510A (en) | 2023-01-28 | 2023-01-28 | Injection mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115972510A true CN115972510A (en) | 2023-04-18 |
Family
ID=85959690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310076507.4A Pending CN115972510A (en) | 2023-01-28 | 2023-01-28 | Injection mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115972510A (en) |
-
2023
- 2023-01-28 CN CN202310076507.4A patent/CN115972510A/en active Pending
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