CN104959567A - Twice synchronous jacking device for die - Google Patents
Twice synchronous jacking device for die Download PDFInfo
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- CN104959567A CN104959567A CN201510402320.4A CN201510402320A CN104959567A CN 104959567 A CN104959567 A CN 104959567A CN 201510402320 A CN201510402320 A CN 201510402320A CN 104959567 A CN104959567 A CN 104959567A
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- plate
- synchronization blocks
- synchronous
- ejector retainner
- slide block
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Abstract
The invention provides a twice synchronous jacking device for a die, and belongs to the technical field of die-casting die. The twice synchronous jacking device for the die solves the technical problems that moving efficiency of a synchronous block in an existing die is low and is easy to be influenced by a spring. According to the technical scheme of the twice synchronous jacking device for the die, the twice synchronous jacking device for the die comprises a fixed die plate, a lower centering plate arranged on the fixed die plate in a folded mode and a synchronous block arranged on the lower centering plate, a pushing rod is arranged on the synchronous block, a synchronous component is arranged between the fixed die plate and the lower centering plate, when the synchronous component makes contact with the synchronous block, the synchronous block drives a centre to move along the lower centering plate, and when the synchronous component separates from the synchronous block, the synchronous block stills and the lower centering plate continues to move. The twice synchronous jacking device for the die has the advantages that the realization of the movement of the synchronous block depends on the synchronous component, and compared with a traditional spring, the twice synchronous jacking device cannot lose efficacy, so that the moving efficiency of the synchronous block is higher, and the moving effect is better; a molded part is avoided from being pulled out directly under a condition that a limiting jacking piece does not separate, and the molded part is prevented from being damaged effectively.
Description
Technical field
The invention belongs to die casting technical field, relate to a kind of top opening, the synchronous top opening of especially a kind of mould secondary.
Background technology
Extrusion process be a kind of high efficiency and less, without the moulding process of cutting metal, extrusion process in modern industry for the production of various metal parts, it has unique technical characterstic and significant economic benefit, extrusion process principle utilizes high pressure molten metal to be pressed at a high speed one to have in the precision metallic mold cavity of given shape, molten metal is cooled and solidified under pressure, and after molten metal solidifies, die casting is opened, take out foundry goods, complete a die casting circulation.
In existing die casting, generally be designed with and profiled member ejected and makes the top opening of its demoulding, top opening comprises fixed clamping plate, ejector retainner plate, synchronization blocks, ejector retainner plate is positioned on fixed clamping plate, synchronization blocks is ejecting between needle plate and fixed clamping plate, ejector spring is provided with between fixed clamping plate and synchronization blocks, synchronization blocks is provided with the main push rod running through ejector retainner plate, push rod is provided with spacing top, after profiled member is shaping, this spacing top by spacing for profiled member live, ejector retainner plate is provided with secondary push rod, during the profiled member demoulding, must be moved by main push rod and secondary push rod simultaneously, make profiled member break away from moulds, then main push rod is static, secondary push rod continues motion, thus make profiled member depart from spacing top, and there is following problem in existing this top opening: be that elastic force by spring realizes because ejector retainner plate moves up, and spring is in long-term stretching motion process, its elastic force can constantly weaken and disappear, and synchronization blocks and main push rod move, and efficiency is lower maybe cannot be moved, depend merely on secondary push rod to move, profiled member and spacing top cannot be made to depart from, therefore, profiled member is caused easily to be pulled in follow-up knockout course, profiled member is caused to be subject to badly damaged.
In sum, in order to solve the technical problem that above-mentioned top opening exists, needing to design a kind of synchronization blocks, to move efficiency high and not by the synchronous top opening of mould secondary that spring affects.
Summary of the invention
The object of the invention is the problems referred to above existed for prior art, proposing a kind of synchronization blocks, to move efficiency high and not by the synchronous top opening of mould secondary that spring affects.
Object of the present invention realizes by following technical proposal: the synchronous top opening of a kind of mould secondary, comprises
Solid plate;
Lower roof plate plate, it is stacked on solid plate;
Synchronization blocks, it is arranged on lower ejector retainner plate, and synchronization blocks is provided with push rod;
Synchronization Component, it is connected with lower ejector retainner plate with solid plate respectively, and when Synchronization Component contacts with synchronization blocks, synchronization blocks drives thimble to move with lower ejector retainner plate, and when Synchronization Component is separated with synchronization blocks, synchronization blocks is static and lower ejector retainner plate continues mobile.
In the synchronous top opening of above-mentioned a kind of mould secondary, described Synchronization Component comprises brace and slide block, brace to be arranged on solid plate and to stretch into lower ejector retainner plate, slide block is arranged on lower ejector retainner plate, slide block offers the inclined hole that runs through slide block and brace is arranged in inclined hole, when slide block contacts with synchronization blocks, synchronization blocks moves with lower ejector retainner plate and slide block moves on brace, when slide block is separated with synchronization blocks, synchronization blocks is static and lower ejector retainner plate continues mobile.
In the synchronous top opening of above-mentioned a kind of mould secondary, described lower ejector retainner plate offers chute and is formed with baffle plate at chute near the side of synchronization blocks, described slide block is positioned at chute and can moves at chute.
In the synchronous top opening of above-mentioned a kind of mould secondary, one end lateral wall that slide block is adjacent with baffle plate offers accommodation hole, and be provided with sliding spring in described accommodation hole, sliding spring two ends are against on baffle plate and slide block respectively.
In the synchronous top opening of above-mentioned a kind of mould secondary, the bottom surface of chute is provided with backing plate, and slide block is positioned on backing plate, and described backing plate and lower ejector retainner plate are connected.
In the synchronous top opening of above-mentioned a kind of mould secondary, one end lateral wall that slide block is adjacent with synchronization blocks is provided with tray, synchronization blocks one end adjacent with slide block lateral wall is provided with holder mouth, and described holder mouth extends to synchronization blocks lower surface, and described holder is positioned at holder mouth soon and is against holder mouth upper surface.
In the synchronous top opening of above-mentioned a kind of mould secondary, the lateral wall of synchronization blocks offers and the mounting groove asking mouth to communicate, be provided with cushion block in described mounting groove, described tray is positioned at holder mouth and is against on cushion block lower surface.
In the synchronous top opening of above-mentioned a kind of mould secondary, described lower ejector retainner plate is folded and is provided with ejector retainner plate, offer the locating slot holding synchronization blocks at upper ejector retainner plate lower surface.
In the synchronous top opening of above-mentioned a kind of mould secondary, described upper ejector retainner plate lower surface also offers the locating hole for holding brace.
In the synchronous top opening of above-mentioned a kind of mould secondary, described solid plate is provided with the gag lever post that one end and solid plate are connected, described gag lever post runs through synchronization blocks and upper ejector retainner plate, gag lever post arranges ejector spring, ejector spring two ends are against on synchronization blocks and solid plate respectively, the gag lever post other end is provided with limited block, and upper ejector retainner plate is provided with the spacing hole holding limited block.
Compared with prior art, the present invention has following beneficial effect:
In the present invention, synchronization blocks contacts with Synchronization Component, drive and with lower ejector retainner plate synchronizing moving, when lower ejector retainner plate moves, synchronization blocks is with lower ejector retainner plate synchronizing moving, when synchronization blocks drives push rod to move to precalculated position, Synchronization Component is separated with synchronization blocks and synchronization blocks no longer moves, and lower ejector retainner plate continues mobile, and make profiled member depart from spacing top, in whole process, the movement of synchronization blocks realizes by Synchronization Component, compare traditional spring, it can not lose efficacy, make the mobile efficiency of synchronization blocks higher, mobile better effects if, thus avoid the situation that profiled member do not depart from spacing top and directly pulled out, profiled member is effectively prevented to be drawn bad.
Accompanying drawing explanation
Fig. 1 is the perspective view of a preferred embodiment of the present invention.
Fig. 2 is the sectional view of a preferred embodiment of the present invention.
Fig. 3 is the amplification view of slide block in a preferred embodiment of the present invention.
Fig. 4 is the stereogram of synchronization blocks in a preferred embodiment of the present invention.
In figure, 100, solid plate; 110, brace; 120, gag lever post; 121, ejector spring; 122, limited block; 200, lower ejector retainner plate; 210, container cavity; 220, slide block; 221, inclined hole; 222, accommodation hole; 223, sliding spring; 230, chute; 231, baffle plate; 232, backing plate; 240, tray; 300, synchronization blocks; 310, push rod; 320, straight footstock; 321, spacing top; 330, Tuo Kou; 340, mounting groove; 341, cushion block; 400, upper ejector retainner plate; 410, locating slot; 420, locating hole; 430, spacing hole.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1 and Figure 2, the synchronous top opening of a kind of mould secondary of the present invention, comprise horizontally disposed solid plate 100, lower ejector retainner plate 200, this lower ejector retainner plate 200 is stacked on solid plate 100.
At the middle part of lower ejector retainner plate 200, there is a container cavity 210, synchronization blocks 300 is horizontally installed with in container cavity 210, synchronization blocks 300 upper surface exceeds lower ejector retainner plate 200 upper surface, push rod 310 is vertically installed with respectively in the both sides of synchronization blocks 300, the top of push rod 310 is provided with straight footstock 320, straight footstock 320 surface thereof is provided with spacing top 321, and this spacing top 321 to stretch in profiled member and to profiled member location, lower ejector retainner plate 200 is also provided with secondary push rod 310 (not shown).
The Synchronization Component that synchronization blocks 300 can be made with the movement of lower ejector retainner plate 200 is installed between solid plate 100 and lower ejector retainner plate 200, this Synchronization Component has two groups and is arranged at the both sides of synchronization blocks 300 respectively, this Synchronization Component comprises brace 110 and slide block 220, brace 110 to be arranged on solid plate 100 and to run through lower ejector retainner plate 200, slide block 220 is installed on lower ejector retainner plate 200 and also can moves on lower ejector retainner plate 200, as shown in Figure 3, slide block 220 offers the inclined hole 221 running through slide block 220 and brace 110 is arranged in inclined hole 221.
Under original state, this slide block 220 stretches into the below of synchronization blocks 300 and contacts with synchronization blocks 300, instantly when ejector retainner plate 200 moves up, slide block 220 moves with lower ejector retainner plate 200, slide block 220 holds synchronization blocks 300 makes synchronization blocks 300 move with lower ejector retainner plate 200 simultaneously, now, profiled member jack-up makes profiled member be separated with mould by push rod 310 and secondary push rod 310 simultaneously, in lower ejector retainner plate 200 moving process, under the effect of brace 110, slide block 220 moves horizontally to the direction away from synchronization blocks 300 gradually, finally depart from synchronization blocks 300, synchronization blocks 300 is static, and lower ejector retainner plate 200 continues to move up, profiled member is ejected spacing top 321 and makes profiled member depart from spacing top 321 and limits by secondary push rod 310, thus make the pull-out of profiled member energy safety.
In whole process, holding synchronization blocks 300 by slide block 220 makes it with lower ejector retainner plate 200 synchronizing moving, then by the effect of brace 110, slide block 220 is separated with synchronization blocks 300 again, compare and drive synchronization blocks 300 to move by spring, the better effects if of slide block 220, it not easily lost efficacy, under the induced effect of slide block 220, the mobile efficiency of synchronization blocks 300 is higher, thus ensure that profiled member can depart from spacing top 321 and safety complete the demoulding.
Be worth one, above-mentioned slide block 220 is not only applicable to the mould of vertical movement with the structure of brace 110, is applicable to the mould moved horizontally simultaneously yet.
As shown in Figure 2 and Figure 3, one end lateral wall that slide block 220 is adjacent with synchronization blocks 300 is provided with tray 240, the lateral wall of the corresponding one end of synchronization blocks 300 offers holder mouth 330, holder mouth 330 extends to synchronization blocks 300 lower surface, and described tray 240 is positioned at holder mouth 330 and is against holder mouth 330 upper surface.
While guarantee support strength, coordinated with holder mouth 330 by tray 240, reduce the contact area of slide block 220 and synchronization blocks 300, thus avoid slide block 220 and synchronization blocks 300 bump contact and increase the frictional force between the two, therefore, make slide block 220 more easily contact with synchronization blocks 300 or be separated, and hold in the palm the setting of mouth 330, make tray 240 without the need to the contact of synchronization blocks 300 bottom surface, comparatively speaking, reduce the integral thickness of mould.
In the present invention, the movement of slide block 220 is synchronization blocks 300 keys with the movement of lower ejector retainner plate 200, in order to increase the mobile efficiency of synchronization blocks 300, as shown in Figure 2, the both sides that lower ejector retainner plate 200 is positioned at synchronization blocks 300 offer chute 230 respectively, and be formed with baffle plate 231 at chute 230 near the side of synchronization blocks 300, this slide block 220 is positioned at chute 230 and can be mobile at chute 230, tray 240 rests on this baffle plate 231, under the support of baffle plate 231, can avoid tray 240 under stressing conditions, cause whole slide block 220 to tilt to tray 240 one end.
Slide block 220 is arranged in chute 230, slide block 220 can only be moved in the scope of chute 230, under the restriction of this chute 230, slide block 220 moves corresponding distance, and can realize with the contact of synchronization blocks 300 or be separated, avoid slide block 220 and move too much distance, decrease the response time of synchronization blocks 300, ensure that the mobile efficiency of synchronization blocks 300, also improve the precision of slide block 220 movement simultaneously.
Lower ejector retainner plate 200 is in the process of moving up, slide block 220 moves simultaneously on chute 230 and brace 110, and slide block 220 and larger frictional force can be produced between chute 230 and brace 110, larger resistance is formed to the mobile of slide block 220, and slide block 220 holds synchronization blocks 300, also have frictional force between itself and synchronization blocks 300, it is smooth and easy not that these all can cause slide block 220 to move, and causes slide block 220 to be normally separated with synchronization blocks 300.
Therefore, one end lateral wall that slide block 220 is adjacent with baffle plate 231 offers accommodation hole 222, this accommodation hole 222 is positioned at the below of tray 240, be provided with sliding spring 223 in described accommodation hole 222, sliding spring 223 two ends are against baffle plate 231 respectively with on slide block 220, after mounting spring, when slide block 220 moves to the direction away from synchronization blocks 300, under the booster action of spring, slide block 220 can move faster, and slide block 220 can be separated with synchronization blocks 300 normally.
As improvement, the bottom surface of chute 230 is provided with backing plate 232, slide block 220 is positioned on backing plate 232, described backing plate 232 is connected with lower ejector retainner plate 200, the material that this cushion block 341 can adopt surface more smooth, can reduce the friction of slide block 220 and chute 230 bottom surface, thus it is more smooth and easy that slide block 220 is moved.
As shown in Figure 2, Figure 4 shows, the lateral wall of synchronization blocks 300 offers and the mounting groove 340 asking mouth 330 to communicate, be provided with cushion block 341 in described mounting groove 340, described tray 240 is positioned at holder mouth 330 and is against on cushion block 341 lower surface.
This cushion block 341 can adopt elastomeric material to make, by arranging cushion block 341, tray 240 is against on cushion block 341 lower surface, avoid mutually wearing and tearing between synchronization blocks 300 and tray 240, and contact in a flash in synchronization blocks 300 with slide block 220, cushion block 341 plays the effect of buffering, avoid tray 240 and synchronization blocks 300 hard contact, effectively prevent tray 240 from producing deformation or damage, therefore, extend the service life of slide block 220.
As Fig. 1, shown in Fig. 2, described lower ejector retainner plate 200 is folded and is provided with ejector retainner plate 400, secondary push rod 310 (not shown) be arranged on lower ejector retainner plate 200 passes upper ejector retainner plate 400, by arranging upper ejector retainner plate 400, add the steadiness of secondary push rod 310, the locating slot 410 holding synchronization blocks 300 is offered at upper ejector retainner plate 400 lower surface, the setting of this locating slot 410, add the positioning precision in synchronization blocks 300 moving process, synchronization blocks 300 is avoided to move to both sides in vertical moving process, the stress equalization of both sides when synchronization blocks 300 is moved, ensure two push rod 310 synchronizing movings.
As improvement, described upper ejector retainner plate 400 lower surface offers the locating hole 420 for holding brace 110, when upper ejector retainner plate 400 moves to initial position, brace 110 enters in locating hole 420, thus ensure that the positioning precision of ejector retainner plate 400 and solid plate 100, it is also the prerequisite that synchronization blocks 300 has good positioning precision.
Solid plate 100 is provided with the gag lever post 120 that one end and solid plate 100 are connected, described gag lever post 120 runs through synchronization blocks 300 and upper ejector retainner plate 400, gag lever post 120 arranges ejector spring 121, ejector spring 121 two ends are against synchronization blocks 300 respectively with on solid plate 100, the thrust that this ejector spring 121 can be assisted when synchronization blocks 300 rises, also can play the effect of buffering when synchronization blocks 300 declines.
Gag lever post 120 other end is provided with limited block 122, upper ejector retainner plate 400 offers the spacing hole 430 holding limited block 122, when slide block 220 is separated with synchronization blocks 300, this limited block 122 is just positioned at spacing hole 430 and contacts with synchronization blocks 300, the setting of limited block 122, synchronization blocks 300 is avoided to continue to move upward under effect of inertia, thus make synchronization blocks 300 can stop motion timely, if synchronization blocks 300 continues to move up, push rod 310 then can be caused to move too much, and spacing top 321 cannot normally and profiled member depart from, delay the demould time of profiled member, the follow-up demoulding even can be made to draw bad profiled member.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (10)
1. the synchronous top opening of mould secondary, is characterized in that: comprise
Solid plate;
Lower roof plate plate, it is stacked on solid plate;
Synchronization blocks, it is arranged on lower ejector retainner plate, and synchronization blocks is provided with push rod;
Synchronization Component, it is connected with lower ejector retainner plate with solid plate respectively, and when Synchronization Component contacts with synchronization blocks, synchronization blocks drives thimble to move with lower ejector retainner plate, and when Synchronization Component is separated with synchronization blocks, synchronization blocks is static and lower ejector retainner plate continues mobile.
2. the synchronous top opening of a kind of mould secondary according to claim 1, it is characterized in that: described Synchronization Component comprises brace and slide block, brace to be arranged on solid plate and to stretch into lower ejector retainner plate, slide block is arranged on lower ejector retainner plate, slide block offers the inclined hole that runs through slide block and brace is arranged in inclined hole, when slide block contacts with synchronization blocks, synchronization blocks moves with lower ejector retainner plate and slide block moves on brace, when slide block is separated with synchronization blocks, synchronization blocks is static and lower ejector retainner plate continues mobile.
3. the synchronous top opening of a kind of mould secondary according to claim 2, is characterized in that: described lower ejector retainner plate offers chute and is formed with baffle plate at chute near the side of synchronization blocks, and described slide block is positioned at chute and can moves at chute.
4. the synchronous top opening of a kind of mould secondary according to claim 2, it is characterized in that: on one end lateral wall that slide block is adjacent with baffle plate, offer accommodation hole, be provided with sliding spring in described accommodation hole, sliding spring two ends are against on baffle plate and slide block respectively.
5. the synchronous top opening of a kind of mould secondary according to claim 3, it is characterized in that: on the bottom surface of chute, be provided with backing plate, slide block is positioned on backing plate, and described backing plate and lower ejector retainner plate are connected.
6. the synchronous top opening of a kind of mould secondary according to claim 2, it is characterized in that: one end lateral wall that slide block is adjacent with synchronization blocks is provided with tray, synchronization blocks one end adjacent with slide block lateral wall is provided with holder mouth, described holder mouth extends to synchronization blocks lower surface, and described holder is positioned at holder mouth soon and is against holder mouth upper surface.
7. the synchronous top opening of a kind of mould secondary according to claim 6, it is characterized in that: offer on the lateral wall of synchronization blocks and the mounting groove asking mouth to communicate, be provided with cushion block in described mounting groove, described tray is positioned at holder mouth and is against on cushion block lower surface.
8. the synchronous top opening of a kind of mould secondary according to claim 2, is characterized in that: described lower ejector retainner plate is folded and is provided with ejector retainner plate, offer the locating slot holding synchronization blocks at upper ejector retainner plate lower surface.
9. the synchronous top opening of a kind of mould secondary according to claim 8, is characterized in that: described upper ejector retainner plate lower surface also offers the locating hole for holding brace.
10. the synchronous top opening of a kind of mould secondary according to claim 8 or claim 9, it is characterized in that: described solid plate is provided with the gag lever post that one end and solid plate are connected, described gag lever post runs through synchronization blocks and upper ejector retainner plate, gag lever post arranges ejector spring, ejector spring two ends are against on synchronization blocks and solid plate respectively, the gag lever post other end is provided with limited block, and upper ejector retainner plate is provided with the spacing hole holding limited block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510402320.4A CN104959567A (en) | 2015-07-07 | 2015-07-07 | Twice synchronous jacking device for die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510402320.4A CN104959567A (en) | 2015-07-07 | 2015-07-07 | Twice synchronous jacking device for die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104959567A true CN104959567A (en) | 2015-10-07 |
Family
ID=54213744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510402320.4A Withdrawn CN104959567A (en) | 2015-07-07 | 2015-07-07 | Twice synchronous jacking device for die |
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| Country | Link |
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| CN (1) | CN104959567A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082245A (en) * | 1976-11-26 | 1978-04-04 | Adelino Claudio Santos | Ejector retraction mechanism |
| DE3106952A1 (en) * | 1980-02-26 | 1981-12-03 | Toshiba Kikai K.K., Tokyo | METAL MOLD FOR MOLDING A HOLLOW BODY WITH INWARD-INCLINED SIDEWALL |
| JPS5987112A (en) * | 1982-11-11 | 1984-05-19 | Toshiba Corp | Undercut processing apparatus of plastic molding tool |
| CN1082467A (en) * | 1992-08-02 | 1994-02-23 | 中国兵器工业第五二研究所宁波分所 | The extrusion casting method of aluminum-alloy wheel and equipment |
| US20060012078A1 (en) * | 2004-07-16 | 2006-01-19 | Eagle Mold Company, Inc. | Decelerated ejector pin system and method for operating the same |
| CN103722700A (en) * | 2013-12-19 | 2014-04-16 | 宁波南方塑料模具有限公司 | Mechanical type mold limiting jacking device |
| CN104227998A (en) * | 2014-08-29 | 2014-12-24 | 宁波南方塑料模具有限公司 | Two-step ejection plastic injection mould |
| CN204724830U (en) * | 2015-07-07 | 2015-10-28 | 宁波南方塑料模具有限公司 | The synchronous top opening of a kind of mould secondary |
-
2015
- 2015-07-07 CN CN201510402320.4A patent/CN104959567A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082245A (en) * | 1976-11-26 | 1978-04-04 | Adelino Claudio Santos | Ejector retraction mechanism |
| DE3106952A1 (en) * | 1980-02-26 | 1981-12-03 | Toshiba Kikai K.K., Tokyo | METAL MOLD FOR MOLDING A HOLLOW BODY WITH INWARD-INCLINED SIDEWALL |
| JPS5987112A (en) * | 1982-11-11 | 1984-05-19 | Toshiba Corp | Undercut processing apparatus of plastic molding tool |
| CN1082467A (en) * | 1992-08-02 | 1994-02-23 | 中国兵器工业第五二研究所宁波分所 | The extrusion casting method of aluminum-alloy wheel and equipment |
| US20060012078A1 (en) * | 2004-07-16 | 2006-01-19 | Eagle Mold Company, Inc. | Decelerated ejector pin system and method for operating the same |
| CN103722700A (en) * | 2013-12-19 | 2014-04-16 | 宁波南方塑料模具有限公司 | Mechanical type mold limiting jacking device |
| CN104227998A (en) * | 2014-08-29 | 2014-12-24 | 宁波南方塑料模具有限公司 | Two-step ejection plastic injection mould |
| CN204724830U (en) * | 2015-07-07 | 2015-10-28 | 宁波南方塑料模具有限公司 | The synchronous top opening of a kind of mould secondary |
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| C06 | Publication | ||
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Application publication date: 20151007 |