CN107839175B - Safety mechanism for preventing collision in ejection process - Google Patents
Safety mechanism for preventing collision in ejection process Download PDFInfo
- Publication number
- CN107839175B CN107839175B CN201710944968.3A CN201710944968A CN107839175B CN 107839175 B CN107839175 B CN 107839175B CN 201710944968 A CN201710944968 A CN 201710944968A CN 107839175 B CN107839175 B CN 107839175B
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- Prior art keywords
- hole
- ejection
- lower template
- lifting plate
- sliding block
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- 230000007246 mechanism Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title abstract description 14
- 230000008569 process Effects 0.000 title abstract description 14
- 238000010304 firing Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001746 injection moulding Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- 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
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a safety mechanism for preventing collision in the ejection process, which comprises: the lower template is fixedly arranged and is provided with a die cavity and a through hole; the sliding block is movably arranged on the lower template and can move at the side part of the die cavity, and a limiting hole is formed in the sliding block; the anti-collision needle penetrates through the through hole, and the anti-collision needle penetrates through the limiting hole when the slide block moves to the position where the through hole is overlapped with the limiting hole; and the ejection mechanism ejects the workpiece out of the die cavity when the anti-collision needle passes through the limiting hole. The invention has the beneficial effects that: the damage to the workpiece caused by forced ejection of the ejection mechanism under the condition that the sliding block is not completely ejected and retreated during die opening is avoided.
Description
Technical Field
The invention belongs to the technical field of molds, and relates to a safety mechanism for preventing collision in an ejection process.
Background
The injection molding process is a high-efficiency, less-cutting and non-cutting molding process, is used for producing various parts in modern industry, has unique technical characteristics and obvious economic benefit, and adopts the principle that plastic liquid is pressed into a precise metal mold cavity with a specific shape at high speed by using high pressure, the plastic liquid is cooled and solidified under the action of pressure, after the plastic liquid is solidified, the injection mold is opened, a casting is taken out, and an injection molding cycle is completed.
The ejection mechanism is generally arranged in the mold, the ejection mechanism can safely eject the injection molded casting out of the mold and effectively protect the whole injection molded part from being damaged, the existing ejection mechanism is generally an ejector pin and a sliding block, in the actual injection molding process, the sliding block needs to be ejected completely, namely the ejector pin can be ejected after the sliding block needs to move towards two sides to a proper position, otherwise, the ejector pin can collide with the workpiece, and the workpiece is damaged.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a safety mechanism for preventing collision in the ejection process.
The purpose of the invention can be realized by the following technical scheme: a safety mechanism to prevent collision during ejection, comprising:
the lower template is fixedly arranged and is provided with a die cavity and a through hole;
the sliding block is movably arranged on the lower template and can move at the side part of the die cavity, and a limiting hole is formed in the sliding block;
the anti-collision needle penetrates through the through hole, and the anti-collision needle penetrates through the limiting hole when the slide block moves to the position where the through hole is overlapped with the limiting hole;
and the ejection mechanism ejects the workpiece out of the die cavity when the anti-collision needle passes through the limiting hole.
Preferably, the slider is provided with an inclined hole, the lower template is provided with an upper template, the upper template is provided with an inclined rod, and the inclined rod is used for penetrating the inclined hole.
Preferably, the bottom plate is located on the lower side of the lower template, a movable inner cavity is formed between the bottom plate and the lower template, the number of the side bases is two, the side bases are respectively arranged on two sides of the bottom plate, and the two side bases are respectively connected with two sides of the lower template in an abutting mode.
Preferably, a lifting plate is arranged in the movable inner cavity, the ejection mechanism is in linkage connection with the lifting plate, one end of the anti-firing pin is fixed on the lifting plate, and the other end of the anti-firing pin penetrates through the through hole.
Preferably, the bottom plate is further provided with a front seat, the front seat is in abutting connection with the lower template, the front seat is provided with a vertical strip-shaped guide hole, the lifting plate is provided with a guide block, and the guide block is arranged in the guide hole in a penetrating mode, so that the lifting plate moves along the vertical direction.
Preferably, the ejection mechanism includes an ejector pin, the ejector pin is disposed on the lifting plate, the lower mold plate is provided with an ejection hole corresponding to the mold cavity, the ejection hole is communicated with the mold cavity, and the ejector pin penetrates through the ejection hole when the lifting plate moves towards the lower mold plate.
Preferably, the lower end of the lifting plate is provided with a lifting rod, and the lifting rod penetrates through the bottom plate to be connected with the lifting plate.
Preferably, the lower template is provided with a limiting groove, the sliding block is arranged in the limiting groove, the side wall of the limiting groove is provided with a guide groove, the sliding block is provided with a protrusion, and the protrusion is embedded in the guide groove, so that the sliding block slides along the direction of the guide groove.
Preferably, the number of the slide blocks is at least two, and the slide blocks are respectively positioned at two sides of the die cavity.
Compared with the prior art, the invention has the beneficial effects that:
1. the damage to the workpiece caused by forced ejection of the ejection mechanism under the condition that the sliding block is not completely ejected and retreated during die opening is avoided.
2. Through the structure of the inclined rod and the inclined hole, in the mold closing process, the slide block can be pulled by the inclined rod to move towards the mold cavity and finally be positioned at two sides of the workpiece; in the mold opening process, the slide block is far away from the mold cavity, so that the slide block moves along with mold closing or mold opening.
3. The front seat can play a guiding role in the lifting plate.
Drawings
FIG. 1 is a schematic view of a mold with a safety mechanism of the present invention;
FIG. 2 is a block diagram of the safety mechanism of the present invention;
FIG. 3 is a schematic view of the movable chamber of the present invention;
FIG. 4 is a schematic view of the connection relationship of the slider of the present invention.
In the figure, 100, a lower template; 110. a mold cavity; 120. a through hole; 130. an ejection aperture; 140. a limiting groove; 141. a guide groove; 200. a slider; 210. a limiting hole; 220. an inclined hole; 230. a protrusion; 300. a striker prevention; 410. a diagonal bar; 500. a base plate; 510. a movable inner cavity; 520. a side base; 530. a lifting plate; 531. a guide block; 540. a front seat; 541. a guide hole; 600. and (4) a thimble.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, 2, 3, and 4, a safety mechanism for preventing collision during ejection includes: the lower template 100 is fixedly arranged, and a mold cavity 110 and a through hole 120 are arranged on the lower template 100; the sliding block 200 is movably arranged on the lower template 100, the sliding block 200 can move at the side part of the die cavity 110, and a limiting hole 210 is arranged on the sliding block 200; a striker 300 inserted into the through hole 120, and the striker 300 passing through the stopper hole 210 when the slider 200 moves until the through hole 120 coincides with the stopper hole 210; an ejection mechanism that ejects the workpiece from the cavity 110 when the striker 300 passes through the stopper hole 210.
The lower template 100 is a fixed mold in the mold, the mold cavity 110 is a cavity structure for molding a workpiece, the slider 200 is located at a side portion of the mold cavity 110 and used for clamping the workpiece to prevent the workpiece from shifting, and the ejection mechanism is used for ejecting the workpiece to enable the workpiece to leave the mold cavity 110 after the mold is opened.
In the existing mold, it is usually necessary to eject the workpiece through mold closing, injection molding, pressure maintaining, cooling, mold opening, ejection of the slider 200, and ejection mechanism, and during mold opening, if the slider 200 is not completely retracted, and is still in a state of clamping the workpiece, the ejection mechanism is ejected, which may damage the workpiece and the mold cavity 110, thereby causing serious economic loss.
After the anti-collision pin 300 is arranged, when the slide block 200 is not moved to a proper position, for example, when a workpiece is clamped, the anti-collision pin 300 cannot be ejected, and the ejection mechanism cannot be ejected; and only when the anti-collision needle 300 penetrates through the limiting hole 210, the ejection mechanism can eject out, so that the workpiece and the die cavity 110 cannot be damaged when the ejection mechanism ejects out.
Through the structure, the phenomenon that the workpiece is damaged due to forced ejection of the ejection mechanism under the condition that the sliding block 200 is not completely ejected and retreated in the die opening process is avoided.
As shown in fig. 1, 2 and 4, in addition to the above embodiment, the slider 200 is provided with an inclined hole 220, the lower template 100 is provided with an upper template (not shown), the upper template is provided with an inclined rod 410, and the inclined rod 410 is used for being inserted into the inclined hole 220.
The diagonal rod 410 is located on the upper module and can penetrate through the diagonal hole 220, so that a linkage structure is formed between the upper module and the sliding block 200.
Simply, through the structure of the diagonal rods 410 and the diagonal holes 220, when the upper mold block moves downward, in this case, for the mold closing process, the slide block 200 is pulled by the diagonal rods 410 to move toward the mold cavity 110, and is finally located at both sides of the workpiece; when the upper mold block moves upward, which is a mold opening process, the slider 200 moves away from the cavity 110, so that the slider 200 moves along with mold closing or mold opening.
Preferably, a cavity is formed in the lower mold plate 100 for the diagonal member 410 to pass through, and when the mold is closed, the diagonal member 410 passes through the diagonal hole 220 and finally passes through into the cavity.
As shown in fig. 1, 2, 3, and 4, on the basis of the above embodiment, the mold further includes a bottom plate 500 and two side bases 520, the bottom plate 500 is located at the lower side of the lower mold plate 100, a movable cavity 510 is formed between the bottom plate 500 and the lower mold plate 100, the number of the side bases 520 is two, and the two side bases 520 are respectively disposed at two sides of the bottom plate 500, and the two side bases 520 are respectively connected to two sides of the lower mold plate 100 in an abutting manner.
It is worth noting here that the bottom plate 500 is a plate-like structure, the number of the side bases 520 is two, and the side bases are used for supporting the lower mold plate 100, and the movable cavity 510 is formed between the lower mold plate 100 and the bottom plate 500 for installing the ejection mechanism and the striker prevention pin 300.
As shown in fig. 2, 3 and 4, in addition to the above embodiment, the movable cavity 510 is provided with a lifting plate 530, the ejection mechanism is linked with the lifting plate 530, one end of the striker 300 is fixed to the lifting plate 530, and the other end passes through the through hole 120.
The lifting plate 530 is matched with the shape of the movable inner cavity 510 and can move between the bottom plate 500 and the lower template 100; when the lifting plate 530 is located on the bottom plate 500, the striker 300 abuts against the lower end surface of the slider 200, and the slider 200 can slide at this time, but the lifting plate 530 cannot move toward the upper module because the striker 300 abuts against the lower end surface of the slider 200, and when the lifting plate 530 cannot move, the ejection mechanism cannot move, so that the ejection mechanism is prevented from damaging the mold cavity 110 at this time.
The structure is very ingenious, and the anti-firing pin 300 can play a role in safety, so that the ejection mechanism cannot eject out when the sliding block 200 is not moved to a proper position.
As shown in fig. 1 and 4, on the basis of the above embodiment, the bottom plate 500 is further provided with a front seat 540, the front seat 540 is abutted against and connected with the lower mold plate 100, the front seat 540 is provided with a vertical bar-shaped guide hole 541, the lifting plate 530 is provided with a guide block 531, and the guide block 531 is inserted into the guide hole 541, so that the lifting plate 530 moves in the vertical direction.
It should be noted that the number of the front seats 540 is two, and the two front seats are respectively located at two ends of the base, that is, at a position between the two side bases 520, so that four sides of the lifting plate 530 can respectively correspond to the two side bases 520 and the two front seats 540; the front seat 540 can guide the lifting plate 530.
Preferably, the number of the guide blocks 531 is two, the guide blocks 531 penetrate through the guide holes 541 of the two front seats 540 respectively, the guide blocks 531 can be connected with air cylinders, and the air cylinders apply force to the guide blocks 531, so that the whole lifting plate 530 is stressed more uniformly and more stably in the moving process when moving, and the precision of the ejection mechanism and the anti-collision needle 300 in the penetrating process is higher.
As shown in fig. 1, in addition to the above embodiment, the ejection mechanism includes an ejector pin 600, the ejector pin 600 is disposed on the lifting plate 530, the lower mold plate 100 is provided with an ejection hole 130 corresponding to the mold cavity 110, the ejection hole 130 communicates with the mold cavity 110, and the ejector pin 600 passes through the ejection hole 130 when the lifting plate 530 moves toward the lower mold plate 100.
The number of the ejector pins 600 is plural, and the number of the ejector holes 130 is the same as that of the ejector pins 600, and the ejector holes 130 are uniformly distributed in the entire mold cavity 110.
In an actual operation process, the thimble 600 moves along with the movement of the lifting plate 530, that is, when the lifting plate 530 moves upward, the thimble 600 can pass through the ejection hole 130 to eject the workpiece; therefore, when the slide block 200 is not completely retracted, the anti-collision pin 300 cannot pass through the through hole 120, the lifting plate 530 cannot be lifted, and the thimble 600 cannot be ejected; when the slide block 200 moves to the position where the through hole 120 coincides with the limiting hole 210, the striker 300 can penetrate into the through hole 120, so that the lifting plate 530 can move upward, and the ejector pin 600 can penetrate through the ejector hole 130, thereby ejecting the workpiece.
As shown in fig. 2 and 3, in addition to the above embodiments, a lifting rod (not shown) is disposed at a lower end of the lifting plate 530, and the lifting rod passes through the bottom plate 500 to be connected to the lifting plate 530. The lifting rod is used for jacking up the lifting plate 530, thereby controlling the lifting plate 530 to lift up and down.
As shown in fig. 1 and 4, on the basis of the above embodiment, the lower mold plate 100 is provided with a limiting groove 140, the slider 200 is disposed in the limiting groove 140, a guide groove 141 is disposed on a side wall of the limiting groove 140, a protrusion 230 is disposed on the slider 200, and the protrusion 230 is embedded in the guide groove 141, so that the slider 200 slides along the direction of the guide groove 141.
When the protrusion 230 is embedded in the guiding groove 141, not only the guiding function can be achieved, but also the movement of the protrusion in other directions can be limited, and further, when the anti-collision pin 300 is abutted against the slider 200, the anti-collision pin can not be jacked up.
As shown in fig. 2 and 3, on the basis of the above embodiment, the number of the sliding blocks 200 is at least two, and the sliding blocks are respectively located at two sides of the mold cavity 110.
The two slides 200 move in the same direction, and when the mold is closed, the two slides 200 move toward the cavity 110, and when the mold is opened, the two slides 200 move away from the cavity 110.
Furthermore, preferably, a molding block is connected to a side of the slider 200 corresponding to the mold cavity 110, and the molding block has high material strength and precision and is used for abutting against a workpiece in the mold cavity 110.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (4)
1. A safety mechanism for preventing collisions during ejection, comprising:
the lower template is fixedly arranged and is provided with a die cavity and a through hole;
the sliding block is movably arranged on the lower template and can move at the side part of the die cavity, and a limiting hole is formed in the sliding block;
the anti-collision needle penetrates through the through hole, and the anti-collision needle penetrates through the limiting hole when the slide block moves to the position where the through hole is overlapped with the limiting hole;
the ejection mechanism ejects a workpiece out of the die cavity when the anti-collision needle passes through the limiting hole;
the lower template is provided with a limiting groove, the sliding block is arranged in the limiting groove, the side wall of the limiting groove is provided with a guide groove, the sliding block is provided with a bulge, and the bulge is embedded in the guide groove, so that the sliding block slides along the direction of the guide groove;
the sliding block is provided with an inclined hole, the lower template is provided with an upper template, the upper template is provided with an inclined rod, and the inclined rod is used for penetrating through the inclined hole;
the bottom plate is positioned at the lower side of the lower template, a movable inner cavity is formed between the bottom plate and the lower template, the number of the side bases is two, the side bases are respectively arranged at two sides of the bottom plate, and the two side bases are respectively connected with two sides of the lower template in an abutting mode;
a lifting plate is arranged in the movable inner cavity, the ejection mechanism is in linkage connection with the lifting plate, one end of the firing prevention pin is fixed on the lifting plate, and the other end of the firing prevention pin penetrates through the through hole;
the lifting plate is characterized in that a front seat is further arranged on the bottom plate and is in abutting connection with the lower template, a vertical strip-shaped guide hole is formed in the front seat, a guide block is arranged on the lifting plate and penetrates through the guide hole, and therefore the lifting plate moves along the vertical direction.
2. A safety mechanism for preventing collision during ejection as claimed in claim 1, wherein: the ejection mechanism comprises an ejector pin, the ejector pin is arranged on the lifting plate, the lower template is provided with an ejection hole corresponding to the mold cavity, the ejection hole is communicated with the mold cavity, and the ejector pin penetrates through the ejection hole when the lifting plate moves towards the lower template.
3. A safety mechanism for preventing collision during ejection as claimed in claim 2, wherein: the lower extreme of lifter plate is provided with the lifter, the lifter passes the bottom plate with the lifter plate is connected.
4. A safety mechanism for preventing collision during ejection as claimed in claim 1, wherein: the number of the slide blocks is at least two, and the slide blocks are respectively positioned on two sides of the die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944968.3A CN107839175B (en) | 2017-10-12 | 2017-10-12 | Safety mechanism for preventing collision in ejection process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944968.3A CN107839175B (en) | 2017-10-12 | 2017-10-12 | Safety mechanism for preventing collision in ejection process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107839175A CN107839175A (en) | 2018-03-27 |
| CN107839175B true CN107839175B (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710944968.3A Active CN107839175B (en) | 2017-10-12 | 2017-10-12 | Safety mechanism for preventing collision in ejection process |
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| CN (1) | CN107839175B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111267300A (en) * | 2020-02-10 | 2020-06-12 | 宁波方正汽车模具股份有限公司 | Demoulding mechanism for automobile instrument panel decorative strip |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2726866Y (en) * | 2004-09-06 | 2005-09-21 | 苏州双林电脑器件有限公司 | Injection mould slide block thimble protection device |
| CN201587098U (en) * | 2010-02-04 | 2010-09-22 | 常州华威亚克模具有限公司 | Mold safety protection device |
| CN202702466U (en) * | 2012-07-24 | 2013-01-30 | 泰德兴精密电子（昆山）有限公司 | Sliding block anti-collision device |
| CN204136328U (en) * | 2014-08-14 | 2015-02-04 | 中山市恒滨塑胶模具有限公司 | A kind of mould structure avoiding slide block and thimble, slide block and oblique top mutually to interfere |
| CN205800065U (en) * | 2016-07-20 | 2016-12-14 | 深圳市京鼎工业技术股份有限公司 | A kind of sliding block core pulling structure |
| CN206217095U (en) * | 2016-09-30 | 2017-06-06 | 杭州凯美模具有限公司 | The safe ejector pin mechanism that a kind of anti-limited slip block bumps against with thimble |
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2017
- 2017-10-12 CN CN201710944968.3A patent/CN107839175B/en active Active
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| Publication number | Publication date |
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| CN107839175A (en) | 2018-03-27 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Safety mechanism preventing collision from occurring during an ejection process Effective date of registration: 20200720 Granted publication date: 20200103 Pledgee: Ningbo Tianjin Enterprise Service Co.,Ltd. Pledgor: NINGBO SOUTH MOLD & PLASTIC Co.,Ltd. Registration number: Y2020330000515 |
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Date of cancellation: 20210729 Granted publication date: 20200103 Pledgee: Ningbo Tianjin Enterprise Service Co.,Ltd. Pledgor: NINGBO SOUTH MOLD & PLASTIC Co.,Ltd. Registration number: Y2020330000515 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Safety mechanism for preventing collision during ejection Effective date of registration: 20210729 Granted publication date: 20200103 Pledgee: Ningbo Tianjin Enterprise Service Co.,Ltd. Pledgor: NINGBO SOUTH MOLD & PLASTIC Co.,Ltd. Registration number: Y2021330001038 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220728 Granted publication date: 20200103 Pledgee: Ningbo Tianjin Enterprise Service Co.,Ltd. Pledgor: NINGBO SOUTH MOLD & PLASTIC Co.,Ltd. Registration number: Y2021330001038 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A safety mechanism for preventing collision during ejection Effective date of registration: 20220729 Granted publication date: 20200103 Pledgee: Ningbo Tianjin Enterprise Service Co.,Ltd. Pledgor: NINGBO SOUTH MOLD & PLASTIC Co.,Ltd. Registration number: Y2022330001315 |
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