CN108715009B - Melting point-based injection mold with junction material leakage automatic cutting structure - Google Patents
Melting point-based injection mold with junction material leakage automatic cutting structure Download PDFInfo
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- CN108715009B CN108715009B CN201810671291.5A CN201810671291A CN108715009B CN 108715009 B CN108715009 B CN 108715009B CN 201810671291 A CN201810671291 A CN 201810671291A CN 108715009 B CN108715009 B CN 108715009B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model provides an injection mold who has juncture hourglass material automatic cutout structure based on melting point, includes that mould, lower mould, hourglass material heat conduction interlock remove subassembly and cutting off plate accelerate the subassembly, wherein: the upper die and the lower die are mutually covered and provided with injection molding holes, the upper die and the lower die are mutually contacted and pressed through the upper enclosing plate and the lower enclosing plate, and an upper cavity of the upper die and a lower cavity of the lower die jointly form an injection molding cavity; the material leakage heat conduction locking and unlocking component is used for melting a paraffin column with a medium and low melting point by utilizing heat conduction energy of material leakage when the material leakage width at the junction of the upper enclosing plate and the lower enclosing plate exceeds a material leakage width threshold value A allowed by an injection molding product, so that locking of the cutting plate is unlocked, and the action of the cutting plate is allowed; the cutting board accelerating assembly is used for providing an initial acceleration of movement for the cutting board while releasing the locking of the cutting board so as to avoid the cutting board from being jammed.
Description
Technical Field
The invention relates to the field of injection molds, in particular to an injection mold with a junction material leakage automatic cutting structure based on a melting point.
Background
Injection molding is a common method for producing and molding industrial products, and generally rubber injection molding or plastic injection molding is used, wherein injection molding products with different properties are obtained by injecting high-temperature molten materials between an upper die and a lower die and cooling and molding.
The common injection mold is formed by covering an upper mold and a lower mold, and an upper mold cavity of the upper mold and a lower mold cavity of the lower mold jointly form an injection molding cavity. Generally, the upper die and the lower die are mutually contacted and covered through straight enclosing plates around a cavity, and then the pressure of a hydraulic cylinder is applied to the outside, so that the upper die and the lower die are tightly attached to each other, and materials are prevented from leaking from a boundary between the upper die and the lower die in the injection molding process. However, due to the limitations of the manufacturing process, it is almost impossible to manufacture a forming die without any boundary material leakage, and particularly, after the die is used for a long time, the levelness of the coaming is deviated to some extent. If the leakage is too large, a relatively obvious convex part is left at the junction of the lower die and the lower die after the product is demoulded, and at the moment, workers need to carry out secondary treatment to carry out convex cutting and polishing.
For a fixed product, the acceptable boundary material leakage amount (i.e. the size of the external convex part left at the boundary after demoulding) is a fixed threshold, and if the boundary material leakage amount is smaller than the threshold, the demoulded product does not need to be specially cut and polished aiming at the external convex part at the boundary. Based on the above, the invention provides an injection mold with an automatic cutting structure at an acceptable leakage width threshold, which takes paraffin wax columns with medium and low melting points as cores, and once leakage exceeding the width threshold occurs, the cutting structure is automatically started to cut off the leakage, and meanwhile, a worker can judge the aging condition of the coaming at the junction of the mold by observing whether the cutting structure acts or not, so as to carry out necessary coaming repair.
Disclosure of Invention
In order to solve the problems, the invention provides an injection mold with a boundary material leakage automatic cutting structure based on a melting point.
The purpose of the invention is realized by adopting the following technical scheme:
the utility model provides an injection mold who has juncture hourglass material automatic cutout structure based on melting point, includes that mould, lower mould, hourglass material heat conduction interlock remove subassembly and cutting off plate accelerate the subassembly, wherein:
the upper die and the lower die are mutually covered and provided with injection molding holes, the upper die and the lower die are mutually contacted and pressed through the upper enclosing plate and the lower enclosing plate, and an upper cavity of the upper die and a lower cavity of the lower die jointly form an injection molding cavity;
leak material heat conduction shutting and remove subassembly for when the hourglass material width of going up bounding wall and lower bounding wall juncture surpassed the hourglass material width threshold value A that injection moulding product allows, utilize the heat conduction heat that leaks the material to melt the paraffin post of low-melting point in to remove the shutting of shut-off plate, allow the shut-off plate action: the material leakage heat conduction locking and unlocking assembly specifically comprises a cut-off plate, the cut-off plate is accommodated in a cut-off plate accommodating groove formed in an upper die, a material leakage groove butted with the cut-off plate accommodating groove is formed in a lower die, the bottom of the material leakage groove is communicated with a heat conduction metal groove, an alloy heat conduction plate is placed in the heat conduction metal groove, and the left end of the heat conduction metal groove is communicated with a lower vertical hole; the upper die is provided with an upper vertical hole butted with the lower vertical hole, the upper end of the upper vertical hole is communicated with a horizontal hole, a metal heat-conducting inserting strip is arranged in the upper vertical hole, the upper end of the metal heat-conducting inserting strip is provided with an inserting strip horizontal part arranged in the horizontal hole, and when the upper enclosing plate is in contact with and covers the lower enclosing plate, the lower end surface of the metal heat-conducting inserting strip is in contact with the lower end surface of the alloy heat-conducting plate; the right end of the horizontal hole is communicated with the sliding hole, the sliding hole is communicated with the cutting board accommodating groove through a sliding groove at the upper end, a discharging hole is communicated below the sliding hole, and the lower end of the discharging hole is opened; a cutting plate bolt inserted into a locking hole formed in the cutting plate is arranged in the sliding hole, the left end of the cutting plate bolt is fixedly connected with the left wall of the sliding hole through a first spring, the first spring is wholly enclosed in the solid paraffin column, when the solid paraffin column is not melted, the cutting plate bolt penetrates through the locking hole, the right end of the horizontal part of the insertion strip extends into the paraffin column, and the first spring is in a stretching state;
the cutting board accelerating assembly is used for providing an initial acceleration of movement for the cutting board when the cutting board is unlocked so as to avoid the cutting board from being jammed: the cutting board acceleration component specifically comprises an acceleration block and a second spring which are integrally arranged in the cutting board accommodating groove, the acceleration block is fixedly connected with the top wall of the cutting board accommodating groove through the second spring, an acceleration block locking hole is formed in the acceleration block, a connecting rod capable of sliding in the sliding groove is fixedly connected to the cutting board bolt, the tail end of the connecting rod is fixedly connected with the acceleration block bolt, and when a paraffin column is not melted, the acceleration block bolt penetrates through the acceleration block locking hole.
Has the advantages that: the invention provides an injection mold with an automatic cutting structure at an acceptable leakage width threshold, which takes paraffin columns with medium and low melting points as cores, and once leakage exceeding the width threshold occurs, the cutting structure is automatically started to cut off the leakage, and meanwhile, a worker can judge the coaming aging condition at the junction of the mold by observing whether the cutting structure acts or not, so as to carry out necessary coaming repair.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is an external view of the lower die;
FIG. 3 is an external view of the upper die;
FIG. 4 is an enlarged view of a portion of FIG. 1 at B;
FIG. 5 is a view showing the spatial configuration of the associated slot in the upper die;
FIG. 6 is a view showing the spatial configuration of the associated slot in the lower mold;
FIG. 7 is an isometric view of the paraffin column, cut-off plate latch related components;
FIG. 8 is an isometric view of the cut-off plate;
FIG. 9 is an isometric view of an acceleration block;
fig. 10 is an isometric view of a metallic thermally conductive slip.
Detailed Description
The invention is further described with reference to the following examples.
Referring to fig. 1 to 10, an injection mold with an automatic boundary material leakage cutting structure based on a melting point includes an upper mold 1, a lower mold 2, a material leakage heat conduction locking releasing assembly and a cutting plate accelerating assembly, wherein:
the upper die 1 and the lower die 2 are mutually covered, an injection molding hole 3 is formed in the upper die 1, the upper die 1 and the lower die 2 are mutually contacted and pressed through an upper surrounding plate 4 and a lower surrounding plate 5, and an upper cavity 6 of the upper die 1 and a lower cavity 7 of the lower die 2 jointly form an injection molding cavity;
the leaked material heat conduction locking releasing assembly is used for melting the paraffin columns 8 with medium and low melting points by utilizing heat conduction energy of leaked materials when the leaked material width at the junction of the upper enclosing plate 4 and the lower enclosing plate 5 exceeds a threshold value A of the allowable leaked material width of the injection molding product, so that locking of the cut-off plate 9 is released, and the cut-off plate 9 is allowed to act;
the cutting plate accelerating assembly is used for providing an initial acceleration of movement for the cutting plate 9 while releasing the locking of the cutting plate 9 so as to avoid jamming of the cutting plate 9.
Go up the rigid coupling on the bottom surface four corners of mould 1 and have four to insert post 10, every inserts in the jack 11 that the post 10 was seted up to 2 top surfaces of lower mould, go up and to pressurize through hydraulic pressure mechanism (prior art, not shown in the figure) between mould 1 and the lower mould 2 and be closed, the die cavity shell of going up mould 1 and lower mould 2 is made by traditional mould steel, and go up bounding wall 4 and lower bounding wall 5 and make by high temperature resistant heat-insulating material, for example ceramic fibre base composite sheet, fine high temperature resistant heat insulating board of glass, coefficient of heat conductivity is no more than 0.05W/m.K, can effectively prevent to lead to the cutting board maloperation because of the.
The material leakage heat conduction locking and unlocking assembly comprises a cutting plate 9, the cutting plate 9 is accommodated in a cutting plate accommodating groove 12 formed in the upper die 1, a material leakage groove 14 in butt joint with the cutting plate accommodating groove 12 is formed in the lower die 2, the bottom of the material leakage groove 14 is communicated with a heat conduction metal groove 15, an alloy heat conduction plate 16 is placed in the heat conduction metal groove 15, and the left end of the heat conduction metal groove 15 is communicated with a lower vertical hole 17; an upper vertical hole 18 butted with the lower vertical hole 17 is formed in the upper die 1, the upper end of the upper vertical hole 18 is communicated with a horizontal hole 19, a metal heat-conducting inserting strip 20 is arranged in the upper vertical hole 18, the upper end of the metal heat-conducting inserting strip 20 is provided with an inserting strip horizontal part 21 arranged in the horizontal hole 19, and when the upper coaming 4 is in contact cover with the lower coaming 5, the lower end surface of the metal heat-conducting inserting strip 20 is in contact with the lower end surface of the alloy heat-conducting plate 16; the right end of the horizontal hole 19 is communicated with a sliding hole 22, the sliding hole 22 is communicated with the cutting board accommodating groove 12 through a sliding groove 23 at the upper end, a discharging hole 24 is communicated below the sliding hole 22, and the lower end of the discharging hole 24 is opened; a cutting board bolt 26 inserted into a locking hole 25 formed in the cutting board 9 is arranged in the sliding hole 22, the left end of the cutting board bolt 26 is fixedly connected with the left wall of the sliding hole 22 through a first spring 27, the first spring 27 is wholly enclosed in the solid paraffin column 8, when the paraffin column 8 is not melted, the cutting board bolt 26 penetrates through the locking hole 25, at the moment, the first spring 27 is in a stretching state, and the right end of the horizontal part 21 of the insert strip extends into the paraffin column 8.
The cutting board accelerating component comprises an accelerating block 30 and a second spring 31 which are integrally arranged in the cutting board accommodating groove 12, the accelerating block 30 is fixedly connected with the top wall of the cutting board accommodating groove 12 through the second spring 31, an accelerating block locking hole 32 is formed in the accelerating block 30, a connecting rod 33 capable of sliding in the sliding groove 23 is fixedly connected to the cutting board bolt 26, the tail end of the connecting rod 33 is fixedly connected with an accelerating block bolt 34, and when the paraffin column 8 is not melted, the accelerating block bolt 34 penetrates through the accelerating block locking hole 32. The right wall of the cutting board receiving groove 12 is provided with a first concave hole 35 and a second concave hole 36 for accommodating the tail ends of the cutting board bolt 26 and the accelerating block bolt 34.
Can all set up corresponding hourglass material heat conduction shutting and remove subassembly and the acceleration of cutting board subassembly at the four sides of bounding wall, the shutting hole, the piece shutting hole that accelerates, cutting board bolt, the piece bolt that accelerates etc. all can select to set up a plurality ofly according to the condition simultaneously, no longer details in this embodiment. The specific melting point of the paraffin column is determined according to the specific material type and temperature of injection molding, although the heat insulation coaming is protected, composite paraffin with a higher melting point, such as Fischer-Tropsch wax and the like, is selected as far as possible, and the melting point can reach 100-150 ℃, so that the paraffin column can be effectively prevented from being melted by mistake.
The working principle of the invention is as follows: when the injection molding leakage at the junction exceeds the width A, the injection molding leakage enters the leakage groove 14 and falls onto the alloy heat conducting plate 16, the alloy heat conducting plate 16 transfers high-temperature heat to the metal heat conducting inserting strip 20, the heat of the metal heat conducting inserting strip 20 transfers the heat to the paraffin column 8 through the horizontal part 21 of the inserting strip, at the moment, the paraffin column 8 starts to melt (the melting speed depends on the melting point of the paraffin and the temperature of the injection molding material), in the melting process of the paraffin column 8, the first spring 27 slowly contracts to return, the cutting plate bolt 26 is pulled to move left, the cutting plate bolt 26 is separated from the locking hole 25, and the cutting plate 9 is in a free state; meanwhile, in the process of moving the cutting board bolt 26 to the left, the accelerating block bolt 34 is also driven to move to the left, so that the accelerating block bolt is separated from the accelerating block locking hole 32, at the moment, the accelerating block 30 is popped up by the elastic force of the second spring 31 to impact the cutting board 9, and the cutting board 9 moves downwards to enter the material leakage groove 14 under the dual effects of the impact force and the self gravity to cut off the material leakage. After the die is used up each time, a worker should pay attention to whether the cut-off plate 9 acts and whether paraffin flows out of the discharging hole 24, and if the cut-off plate 9 acts, the worker should timely inform a maintainer of leveling and repairing the coaming, so that the maintenance worker can be put into use again.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (3)
1. The utility model provides an injection mold who has boundary hourglass material automatic cutout structure based on melting point, characterized by, including last mould, lower mould, hourglass material heat conduction shutting and remove subassembly and cutting board acceleration subassembly, wherein:
the upper die and the lower die are mutually covered and provided with injection molding holes, the upper die and the lower die are mutually contacted and pressed through the upper enclosing plate and the lower enclosing plate, and an upper cavity of the upper die and a lower cavity of the lower die jointly form an injection molding cavity;
leak material heat conduction shutting and remove subassembly for when the hourglass material width of going up bounding wall and lower bounding wall juncture surpassed the hourglass material width threshold value A that injection moulding product allows, utilize the heat conduction heat that leaks the material to melt the paraffin post of low-melting point in to remove the shutting of shut-off plate, allow the shut-off plate action: the material leakage heat conduction locking and unlocking assembly specifically comprises a cut-off plate, the cut-off plate is accommodated in a cut-off plate accommodating groove formed in an upper die, a material leakage groove butted with the cut-off plate accommodating groove is formed in a lower die, the bottom of the material leakage groove is communicated with a heat conduction metal groove, an alloy heat conduction plate is placed in the heat conduction metal groove, and the left end of the heat conduction metal groove is communicated with a lower vertical hole; the upper die is provided with an upper vertical hole butted with the lower vertical hole, the upper end of the upper vertical hole is communicated with a horizontal hole, a metal heat-conducting inserting strip is arranged in the upper vertical hole, the upper end of the metal heat-conducting inserting strip is provided with an inserting strip horizontal part arranged in the horizontal hole, and when the upper enclosing plate is in contact with and covers the lower enclosing plate, the lower end surface of the metal heat-conducting inserting strip is in contact with the lower end surface of the alloy heat-conducting plate; the right end of the horizontal hole is communicated with the sliding hole, the sliding hole is communicated with the cutting board accommodating groove through a sliding groove at the upper end, a discharging hole is communicated below the sliding hole, and the lower end of the discharging hole is opened; a cutting plate bolt inserted into a locking hole formed in the cutting plate is arranged in the sliding hole, the left end of the cutting plate bolt is fixedly connected with the left wall of the sliding hole through a first spring, the first spring is wholly enclosed in the solid paraffin column, when the solid paraffin column is not melted, the cutting plate bolt penetrates through the locking hole, the right end of the horizontal part of the insertion strip extends into the paraffin column, and the first spring is in a stretching state;
the cutting board accelerating assembly is used for providing an initial acceleration of movement for the cutting board when the cutting board is unlocked so as to avoid the cutting board from being jammed: the cutting board acceleration component specifically comprises an acceleration block and a second spring which are integrally arranged in the cutting board accommodating groove, the acceleration block is fixedly connected with the top wall of the cutting board accommodating groove through the second spring, an acceleration block locking hole is formed in the acceleration block, a connecting rod capable of sliding in the sliding groove is fixedly connected to the cutting board bolt, the tail end of the connecting rod is fixedly connected with the acceleration block bolt, and when a paraffin column is not melted, the acceleration block bolt penetrates through the acceleration block locking hole.
2. The injection mold with the junction material leakage automatic cutting structure based on the melting point as claimed in claim 1, wherein four insertion posts are fixedly connected to four corners of the bottom surface of the upper mold, each insertion post is inserted into an insertion hole formed in the top surface of the lower mold, the upper mold and the lower mold can be closed by pressurizing through a hydraulic mechanism, the cavity shells of the upper mold and the lower mold are made of traditional mold steel, and the upper enclosing plate and the lower enclosing plate are made of high-temperature-resistant heat-insulating materials.
3. The melting point-based injection mold with an automatic boundary material leakage cutting structure as claimed in claim 2, wherein the right wall of the cutting board receiving groove is provided with a first concave hole and a second concave hole for accommodating the ends of the cutting board plug pin and the accelerating block plug pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671291.5A CN108715009B (en) | 2018-06-27 | 2018-06-27 | Melting point-based injection mold with junction material leakage automatic cutting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671291.5A CN108715009B (en) | 2018-06-27 | 2018-06-27 | Melting point-based injection mold with junction material leakage automatic cutting structure |
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| Publication Number | Publication Date |
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| CN108715009A CN108715009A (en) | 2018-10-30 |
| CN108715009B true CN108715009B (en) | 2020-02-04 |
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| CN201810671291.5A Active CN108715009B (en) | 2018-06-27 | 2018-06-27 | Melting point-based injection mold with junction material leakage automatic cutting structure |
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| CN111231249B (en) * | 2020-02-23 | 2020-12-29 | 深圳市海翔铭实业有限公司 | Heat utilization compresses tightly type injection mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2868165B2 (en) * | 1991-07-31 | 1999-03-10 | キヤノン株式会社 | Plastic molded optical element and molding die thereof |
| JP3189261B2 (en) * | 1994-02-15 | 2001-07-16 | 三菱マテリアル株式会社 | Mold with gate cutting mechanism |
| US7559761B2 (en) * | 2004-11-18 | 2009-07-14 | Panasonic Corporation | Injection molding machine, injection molding method and injection mold |
| CN101905515B (en) * | 2010-07-26 | 2013-11-06 | 邹翠云 | Method for realizing zero mismatch of parting surface of injection molding or die-casting die and die |
| CN106042300A (en) * | 2016-06-29 | 2016-10-26 | 苏州天朋精密元器件有限公司 | Plastic die with automatic waste cutoff function |
| CN106738733B (en) * | 2017-04-14 | 2019-05-07 | 四川长虹电器股份有限公司 | With the mould structure for eliminating mosaic line |
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Effective date of registration: 20200106 Address after: 266000 East, 1727 Shuicheng Road, Huangdao District, Qingdao, Shandong Province Applicant after: Qingdao jieruilong industry and Trade Co., Ltd Address before: 510000 12 Yuanhua West Road, Liwan District, Guangzhou, Guangdong Applicant before: Huang Jiajian |
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