CN220576529U - Exhaust structure and die - Google Patents

Exhaust structure and die Download PDF

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Publication number
CN220576529U
CN220576529U CN202322126023.4U CN202322126023U CN220576529U CN 220576529 U CN220576529 U CN 220576529U CN 202322126023 U CN202322126023 U CN 202322126023U CN 220576529 U CN220576529 U CN 220576529U
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groove
guide hole
exhaust
hole
forming
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CN202322126023.4U
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黄军华
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Ace Mold Industrial Shenzhen Co Ltd
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Ace Mold Industrial Shenzhen Co Ltd
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Abstract

The utility model discloses an exhaust structure and a die, wherein the exhaust structure comprises a die core main body and an insert needle, the die core main body is provided with a forming groove and a guide hole, the guide hole is communicated with the forming groove, the inner side wall of the guide hole is provided with an exhaust groove, the top end of the exhaust groove is lower than the top end of the guide hole, and the bottom end of the exhaust groove penetrates through the die core main body; the insert pin is slidably assembled in the guide hole, one end of the insert pin, which is close to the forming groove, is provided with a plug, an annular groove is arranged below the plug, and the insert pin is moved to disconnect the forming groove and the exhaust groove or to enable the annular groove to be communicated with the forming groove and the exhaust groove. Through setting up the exhaust groove, replace traditional exhaust plane structure of inserting needle lateral wall, the annular that the needle only needs the processing tip can put into use of inserting, effectively reduces the processing degree of difficulty of inserting the needle, reduces the design cost of mould.

Description

Exhaust structure and die
Technical Field
The utility model relates to the technical field of dies, in particular to an air structure and a die.
Background
When the product is injection molded, the mold is required to be provided with an exhaust insert needle corresponding to the deep bone position or the column position of the product so as to remove the gas in the cavity, thereby avoiding negative influence of trapped gas on the product quality and injection molding cycle. The exhaust insert on the market at present mainly sets up annular recess at the front end of insert, sets up the exhaust plane that extends to the recess at insert lateral wall, and when insert the guide hole of needle installation in the mould, recess, exhaust plane respectively with the guide hole inside wall formation clearance, this clearance is the exhaust passage between insert needle and the mould promptly, when recess and die cavity intercommunication, the gas that gives in the die cavity can be through the exhaust passage outside the discharge mould. However, when the needle is too thin, the machining precision requirement is high, and a proper exhaust plane is difficult to machine on the side wall of the insert needle, so that the machining difficulty of the insert needle is increased, and the design cost of the die is increased.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the exhaust structure, the exhaust channel can be formed without complex processing of the insert pin, the processing difficulty of the insert pin is effectively reduced, and the design cost of the die is reduced.
The utility model further provides a die with the exhaust structure.
According to an embodiment of the first aspect of the utility model, the exhaust structure comprises a die core main body and an insert pin, wherein the die core main body is provided with a forming groove and a guide hole, the guide hole is positioned below the forming groove and is communicated with the forming groove, the inner side wall of the guide hole is provided with an exhaust groove, the top end of the exhaust groove is lower than the top end of the guide hole along the axial direction of the guide hole, and the bottom end of the exhaust groove penetrates through the die core main body; the insert pin is axially and slidably assembled in the guide hole, a plug is arranged at one end, close to the forming groove, of the insert pin, an annular groove is arranged below the plug, and the insert pin is moved to disconnect the forming groove and the exhaust groove or to enable the annular groove to be communicated with the forming groove and the exhaust groove.
According to the exhaust structure provided by the embodiment of the utility model, the exhaust structure has at least the following beneficial effects: after the die is assembled, the forming groove of the die core main body and other die cores or half dies form a complete cavity, at the moment, the plug at the end part of the insert pin is positioned in the cavity, the annular groove part below the plug is communicated with the cavity, the other part of the plug is communicated with the exhaust groove, along with the injection of glue solution, the injection pressure of the glue solution compresses gas in the cavity, and then drives the gas to sequentially pass through the annular groove and the exhaust groove, and then the die core main body is discharged from the bottom end of the exhaust groove, along with the flow of the glue solution, the glue solution can contact and drive the plug to move towards the guide hole, and the plug enters the guide hole to disconnect the forming groove and the exhaust groove, so that the problems of burrs, criticizing edges and the like of formed products caused by the fact that the glue solution flows into the guide hole are avoided. Through setting up the exhaust groove, when guaranteeing that the mould is discharged smoothly, effectively improve the yields of product finished product, also can form the exhaust passage with the die cavity intercommunication between exhaust groove and the annular to replace traditional exhaust planar structure of inlaying the needle lateral wall, inlay the needle and only need the annular of processing tip can put into use, effectively reduce the processing degree of difficulty of inlaying the needle, reduce the design cost of mould.
According to some embodiments of the utility model, the depth of the vent slot increases gradually in a direction away from the shaping slot.
According to some embodiments of the utility model, the die core main body is provided with a stepped hole, the stepped hole is positioned below the guide hole and is communicated with the guide hole, the aperture of the stepped hole is larger than that of the guide hole, the inner side wall of the stepped hole and the inner side wall of the guide hole are transited through a guide part, and the guide part is used for guiding the insert needle to enter the guide hole.
According to some embodiments of the utility model, the depth of the vent groove is less than the difference between the radius of the vent hole and the radius of the stepped hole in the radial direction of the vent hole.
According to some embodiments of the utility model, the vent slot is arcuate in shape coaxial with the guide hole.
According to some embodiments of the utility model, the central angle of the arc-shaped exhaust groove is alpha, which satisfies the following conditions: alpha is more than or equal to 2 degrees and less than or equal to 4 degrees.
According to some embodiments of the utility model, a molding block is disposed in the molding groove, a plurality of guide holes are disposed around the molding block, and the exhaust groove is disposed at a side of the guide hole facing away from the molding block.
According to some embodiments of the utility model, the length of the vent groove is a and the length of the guide hole is b along the axial direction of the guide hole, satisfying: b is more than or equal to 0.7 and less than or equal to a is more than or equal to b is more than or equal to 0.9.
A mold according to an embodiment of the second aspect of the present utility model includes a venting structure as described in the above embodiment.
The die provided by the embodiment of the utility model has at least the following beneficial effects: through setting up the exhaust groove, when guaranteeing that the mould injection molding process is discharged smoothly, effectively improve the yields of product finished product, the exhaust planar structure of traditional mold insert lateral wall is replaced to the exhaust groove, and the mold insert only needs the annular of processing tip can put into use, effectively reduces the processing degree of difficulty of mold insert, reduces the design cost of mould.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an exhaust structure according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of an exhaust structure of an embodiment of the present utility model;
FIG. 3 is a bottom view of a mold body according to an embodiment of the present utility model;
fig. 4 is a top view of a mold body according to an embodiment of the present utility model.
Reference numerals: a mold core main body 100; a molding tank 101; a guide hole 102; an exhaust groove 103; a stepped hole 104; a guide portion 110; a molding block 120; a closing section 130; a needle 200; a ring groove 201; and a plug 210.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 and 2, an exhaust structure according to an embodiment of the present utility model includes a mold core main body 100 and an insert pin 200, wherein the mold core main body 100 is provided with a molding groove 101 and a guide hole 102 penetrating through the mold core main body 100 in a vertical direction, the molding groove 101 is used for being matched with other mold cores or half molds to form a complete cavity, the guide hole 102 is located below the molding groove 101 and is communicated with the molding groove 101, an exhaust groove 103 is arranged on an inner side wall of the guide hole 102, along an axial direction of the guide hole 102, a top end of the exhaust groove 103 is lower than a top end of the guide hole 102, a bottom end of the exhaust groove 103 penetrates through the mold core main body 100, that is, a top end of the exhaust groove 103 is located below a molding position of the mold core main body 100, and a bottom end of the exhaust groove 103 is communicated with a bottom end of the guide hole 102; the insert pin 200 is assembled in the guide hole 102 in a sliding manner along the axial direction of the guide hole 102 and is in clearance fit with the guide hole 102, a plug 210 with the same diameter as the insert pin 200 is arranged at one end, close to the forming groove 101, of the insert pin 200, a ring groove 201 is arranged below the plug 210, namely, the outer diameter of the insert pin 200 below the plug 210 is smaller than that of the plug 210, the insert pin 200 is moved downwards, when the plug 210 enters the guide hole 102, the forming groove 101 and the exhaust groove 103 are disconnected, the insert pin 200 is moved upwards, and when the plug 210 is separated from the rising guide hole 102, the forming groove 101 is communicated with the exhaust groove 103 through the ring groove 201.
It can be understood that after the mold is closed, the forming groove 101 of the mold core main body 100 and other mold cores or half molds form a complete cavity, at this time, the plug 210 at the end of the insert pin 200 is located in the cavity, the ring groove 201 below the plug 210 is partially communicated with the cavity, the other part is communicated with the exhaust groove 103, along with injection of the glue solution, the injection pressure of the glue solution compresses the gas in the cavity, and then drives the gas to sequentially pass through the ring groove 201 and the exhaust groove 103, and further the mold core main body 100 is discharged from the bottom end of the exhaust groove 103, along with the flow of the glue solution, the glue solution contacts and drives the plug 210 to move towards the guide hole 102, and the plug 210 enters the guide hole 102 to disconnect the forming groove 101 and the exhaust groove 103, so as to avoid the problems of burrs, crippling and the like of the formed product caused by the flow of the glue solution into the guide hole 102. Through setting up the exhaust groove 103, when guaranteeing that the mould is discharged smoothly, effectively improve the yields of product finished product, also can form between exhaust groove 103 and the annular 201 and the exhaust passage (not shown in the figure) of die cavity intercommunication to replace traditional and insert the exhaust planar structure of needle 200 lateral wall, insert needle 200 only need the annular 201 of processing tip and can put into use, effectively reduce the processing degree of difficulty of inserting needle 200, reduce the design cost of mould.
Referring to fig. 1 and 2, it can be appreciated that the depth of the vent groove 103 gradually increases in a direction away from the forming groove 101, i.e., the bottom end of the vent groove 103 is offset radially outwardly along the guide hole 102, and particularly, the depth of the top end of the vent groove 103 is 0, i.e., the top end of the vent groove 103 can be regarded as approximately a curve on the inner side wall of the guide hole 102. Since the top end of the air exhaust groove 103 has no depth and the bottom end penetrates through the mold core main body 100, obviously, the air exhaust groove 103 is inclined integrally and two ends have no horizontal plane structure, and when the mold core main body 100 is manufactured, a manufacturer only needs to use boring cutters, milling cutters and the like to mill the hole groove machining cutters, and directly mill the inner side wall of the guide hole 102 from the peripheral end surface of the bottom end of the guide hole 102 along the inclined direction, so that the air exhaust groove 103 can be manufactured. The exhaust groove 103 is arranged to be the chute with gradually increased depth and no depth at the top end, so that the design and the processing of the exhaust groove 103 can be facilitated, the structure of the exhaust groove 103 is simplified, and the design cost of a die is further reduced.
Further, the mold core main body 100 is provided with a stepped hole 104, the stepped hole 104 is located below the guide hole 102 and is communicated with the guide hole 102, the aperture of the stepped hole 104 is larger than that of the guide hole 102, transition is performed between the inner side wall of the stepped hole 104 and the inner side wall of the guide hole 102 through a guiding portion 110, the guiding portion 110 is a chamfer structure with the outer diameter gradually decreasing upwards, and the guiding portion 110 is used for guiding the insert needle 200 to enter the guide hole 102. The guide hole 102 is directly in clearance fit with the insert 200, so that a user needs to position the insert 200 when installing the insert 200, the insert 200 can be directly inserted into the stepped hole 104 by arranging the stepped hole 104 and the guide part 110 when assembling a die, and the guide part 110 guides the insert 200 to enter the guide hole 102 along with the insert 200 extending into the stepped hole 104 and reaching the guide part 110, thereby saving the time cost and labor cost required by the user for positioning the insert 200, effectively improving the use experience of the user and improving the assembly efficiency of the insert 200.
Referring to fig. 3, it can be understood that the length of the air discharge groove 103 is a and the length of the guide hole 102 is b along the axial direction of the guide hole 102, satisfying: b is more than or equal to 0.7 and less than or equal to a is more than or equal to b is more than or equal to 0.9. Since the top of the vent slot 103 is lower than the top of the guide hole 102, there will be a portion of the structure of the inner sidewall of the guide hole 102 above the vent slot 103 that forms the closed section 130 that mates with the plug 210, and the forming slot 101 (or cavity) is disconnected from the vent slot 103 when the plug 210 contacts the closed section 130. Obviously, the length of the closed section 130 is b-a, if the length of the closed section 130 is too short, the structure of the closed section 130 is fragile, the top end of the air exhaust groove 103 is close to the forming groove 101, the injection molding pressure of one end mold is too large, the closed section 130 is easily damaged or the insert needle 200 is directly pressed down to pass over the closed section 130, the air exhaust groove 103 is directly communicated with the forming groove 101, air leakage of the mold is caused, and the injection molding quality is influenced; if the length of the closed section 130 is too long, in order to adapt to the long closed section 130 and ensure the formation of the exhaust channel, the length of the ring groove 201 needs to be lengthened along the axial direction of the insert 200, which easily results in the fragile structure of the insert 200 and easy breakage during repeated use, resulting in the increase of the production cost of the mold. The length of the guide hole 102 is limited to 70-90% of the length of the guide hole 102, namely, the length of the closed section 130 is limited to 10-30% of the length of the hole, so that the structural strength of the closed section 130 is reasonable, the injection sealing performance of the mold core main body 100 is improved, the overlong length of the ring groove 201 on the insert needle 200 is avoided, and the service life of the insert needle 200 is effectively prolonged.
Referring to fig. 3, it can be appreciated that the depth of the air discharge groove 103 is smaller than the difference between the radius of the guide hole 102 and the radius of the stepped hole 104 in the radial direction of the guide hole 102. Since the stepped hole 104 and the guide portion 110 are provided, and the air discharge groove 103 penetrates through the mold core main body 100, it is obvious that the bottom end of the air discharge groove 103 penetrates through the guide portion 110, at this time, the aperture of the stepped hole 104 is equal to the outer diameter of the large end of the guide portion 110, if the depth of the air discharge groove 103 is greater than the difference between the radius of the guide hole 102 and the radius of the stepped hole 104, the bottom of the air discharge groove 103 partially penetrates into the inner side wall of the guide portion 110, so that the processing difficulty of the air discharge groove 103 is greatly increased, the depth of the air discharge groove 103 is limited between the outer diameter of the guide hole 102 and the outer diameter of the stepped hole 104, and when the air discharge groove 103 is processed, the processing of the insert needle 200 is further reduced from the surface of the guide portion 110, and the structural rationality of the air discharge groove 103 is improved.
Referring to fig. 4, it can be understood that the exhaust groove 103 has an arc shape coaxial with the guide hole 102, and in particular, an end surface of the exhaust groove 103 away from the center line of the guide hole 102 has an arc shape coaxial with the guide hole 102. The exhaust groove 103 is an arc groove, which can be matched with the shape of the guide hole 102, so that the structural consistency of the die core main body 100 is effectively improved.
Further, the central angle of the arc-shaped exhaust groove 103 is α, which satisfies the following conditions: alpha is more than or equal to 2 degrees and less than or equal to 4 degrees. The central angle of the air discharge groove 103 can be approximately regarded as the width of the air discharge groove 103, and since the air discharge groove 103 is directly arranged on the inner side wall of the guide hole 102, the central angle of the air discharge groove 103 directly determines the proportion of the air discharge groove 103 occupying the inner side wall of the guide hole 102. The central angle of the exhaust groove 103 is limited to 2 degrees to 4 degrees, so that on one hand, the problems of loosening, deflection and the like of the insert needle 200 caused by the fact that the exhaust groove 103 is excessively large in proportion and the guide hole 102 and the insert needle 200 are unstably matched can be avoided, and the mounting stability of the insert needle 200 is effectively improved; on the other hand, the problems that the size of the exhaust groove 103 is too small, and the gas is difficult to timely exhaust, clean and the like can be avoided, and the operation efficiency of the exhaust groove 103 is effectively improved.
Referring to fig. 3 and 4, it can be understood that the molding groove 101 is provided with a molding block 120 with an insert 121, the guide holes 102 are provided in plurality, the guide holes 102 are arranged around the molding block 120 and correspond to deep bone positions of the product one by one, and the air exhaust groove 103 is positioned at one side of the guide holes 102 away from the molding block 120. In general, the product may have a plurality of deep positions or columns, and at this time, a plurality of guide holes 102 and insert needles 200 corresponding to the deep positions or columns are required to be set to improve the yield of the product, and in addition, the air discharge slots 103 corresponding to each guide hole 102 are located at one side of the guide hole 102 away from the forming block 120, so that the plurality of air discharge slots 103 are set around the outer edge of the whole product, the setting radius of the air discharge slots 103 is increased, and the inclined structure of the air discharge slots 103 is matched, so that the air guided by the plurality of air discharge slots 103 is prevented from gathering towards the center of the mold core main body 100, the operation efficiency of the air discharge slots 103 is further improved, and the structural rationality of the mold core main body 100 is improved.
A mold according to an embodiment of the present utility model includes an exhaust structure of the above embodiment.
The mold adopts all the technical schemes of the exhaust structure of the above embodiment, so that the mold has at least all the beneficial effects brought by the technical schemes of the above embodiment, and the description is omitted here.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (9)

1. An exhaust structure, comprising:
the die core main body is provided with a forming groove and a guide hole, the guide hole is positioned below the forming groove and is communicated with the forming groove, the inner side wall of the guide hole is provided with an exhaust groove, the top end of the exhaust groove is lower than the top end of the guide hole along the axial direction of the guide hole, and the bottom end of the exhaust groove penetrates through the die core main body;
and the insert pin is axially and slidably assembled in the guide hole, a plug is arranged at one end, close to the forming groove, of the insert pin, an annular groove is arranged below the plug, and the insert pin is moved to disconnect the forming groove and the exhaust groove or to connect the annular groove with the forming groove and the exhaust groove.
2. A venting structure as defined in claim 1, wherein the depth of the venting grooves increases progressively in a direction away from the forming grooves.
3. The exhaust structure according to claim 2, wherein the die core body is provided with a stepped hole, the stepped hole is located below the guide hole and is communicated with the guide hole, the aperture of the stepped hole is larger than that of the guide hole, transition is performed between the inner side wall of the stepped hole and the inner side wall of the guide hole through a guide part, and the guide part is used for guiding the insert needle to enter the guide hole.
4. A vent structure according to claim 3, wherein the depth of the vent groove is smaller than the difference between the radius of the vent hole and the radius of the stepped hole in the radial direction of the vent hole.
5. A vent structure according to claim 2 or 4, wherein said vent slot is arcuate in shape coaxially with said guide opening.
6. The exhaust structure according to claim 5, wherein a central angle of the arc-shaped exhaust groove is α, which satisfies: alpha is more than or equal to 2 degrees and less than or equal to 4 degrees.
7. An exhaust structure according to claim 1 or 2, wherein a forming block is provided in the forming groove, a plurality of the guide holes are provided around the forming block, and the exhaust groove is located on a side of the guide hole facing away from the forming block.
8. The exhaust structure according to claim 1, wherein the length of the exhaust groove is a and the length of the guide hole is b in the axial direction of the guide hole, satisfying: b is more than or equal to 0.7 and less than or equal to a is more than or equal to b is more than or equal to 0.9.
9. A mould comprising a venting structure according to any one of claims 1 to 8.
CN202322126023.4U 2023-08-08 2023-08-08 Exhaust structure and die Active CN220576529U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322126023.4U CN220576529U (en) 2023-08-08 2023-08-08 Exhaust structure and die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322126023.4U CN220576529U (en) 2023-08-08 2023-08-08 Exhaust structure and die

Publications (1)

Publication Number Publication Date
CN220576529U true CN220576529U (en) 2024-03-12

Family

ID=90107259

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322126023.4U Active CN220576529U (en) 2023-08-08 2023-08-08 Exhaust structure and die

Country Status (1)

Country Link
CN (1) CN220576529U (en)

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