CN116118064B - A track-changing rear mold demoulding device - Google Patents
A track-changing rear mold demoulding deviceInfo
- Publication number
- CN116118064B CN116118064B CN202211402146.XA CN202211402146A CN116118064B CN 116118064 B CN116118064 B CN 116118064B CN 202211402146 A CN202211402146 A CN 202211402146A CN 116118064 B CN116118064 B CN 116118064B
- Authority
- CN
- China
- Prior art keywords
- sliding guide
- transition section
- changing
- guide rail
- demolding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention relates to the technical field of mold design and discloses a rail-changing type rear mold demolding device which comprises a rear mold plate, wherein a straight jacking block for demolding a mold is arranged on the rear mold plate, the straight jacking block is driven by a jacking rod to lift, a guiding mechanism for changing the movement track of the straight jacking block is arranged on the rear mold plate, the guiding mechanism comprises a rail-changing guiding block fixedly connected to the rear mold plate, a sliding guide rail is fixedly connected to the rail-changing guiding block, a supporting rod is fixedly connected to the straight jacking block, a sliding limiting clamping groove which is clamped with the sliding guide rail is arranged on the supporting rod, a plurality of auxiliary grooves are uniformly arranged on two sides of the sliding guide rail at intervals, auxiliary pulleys matched with the auxiliary grooves are rotatably arranged in the limiting clamping groove, when the size of a bulge or a lateral groove is smaller, the elastic deformation of a plastic piece can be adopted for forced demolding, the mold structure can be simplified, the production cost can be reduced, and the aesthetic degree of the plastic piece can be improved.
Description
Technical Field
The invention relates to a track-changing rear mould demoulding device, and belongs to the technical field of mould design.
Background
The injection mold is commonly used in the fields of automobile manufacturing and the like, at present, plastic products are irregular in shape due to the multifunctional integration and appearance requirements of the plastic products, and particularly have more structures such as hinge type clamping claws and integral type protrusions, so that plastic part demolding is difficult, a traditional demolding mode is mainly realized by adopting an oil cylinder external-pull type demolding structure or a hinge type clamping claw to be demolded in a manual taking-out mode, and due to the fact that the space of a production workshop is generally narrow, the demolding mode is complex in process, large in occupied space and severely limited by working space, production efficiency is low, labor cost is improved, and production requirements of plastic parts cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of providing the track-changing rear mould demoulding device which can realize demoulding of plastic parts in a limited space, can finish high-efficiency demoulding of the plastic parts on the premise of small occupied space, does not influence the quality of the plastic parts, improves the stability of the whole device during demoulding operation, avoids shaking in the moving process, and ensures that the device can perform demoulding operation at a uniform speed and smoothly.
In order to achieve the above object, the following means are employed.
The utility model provides a become rail type rear mould shedder, includes the back template, be equipped with the straight kicking block that is used for the mould drawing of patterns on the back template, straight kicking block is gone up and down by the ejector pin drive, install the guiding mechanism that is used for changing straight kicking block movement track on the back template, guiding mechanism is including the guide block that becomes rail of rigid coupling on the back template, it has the sliding guide to become the rigid coupling on the guide block to become rail, it has the bracing piece to go up the rigid coupling on the straight kicking block, be equipped with the slip spacing draw-in groove with sliding guide joint on the bracing piece, the both sides of sliding guide evenly and the interval be equipped with a plurality of auxiliary grooves, spacing draw-in groove internal rotation is installed with auxiliary pulley of auxiliary groove assorted.
The following is a further optimization of the above technical solution according to the present invention:
The sliding guide rail is sequentially divided into a first transition section, a second transition section, a third transition section and a fourth transition section from bottom to top according to the demolding track.
For guaranteeing the stability of straight kicking block in the lift in-process, the auxiliary pulley passes through the bull stick and rotates to be installed on the bracing piece, the auxiliary pulley is including rotating the annular ball chamber of installing on the bull stick, the ball chamber comprises an confined cavity by inner ring and outer loop, be the circumference equipartition in the cavity and have a plurality of big balls, big ball and inner ring interval set up and follow outer loop on outstanding part, just all be equipped with little ball between every two adjacent big balls in the cavity, little ball is laminated with the inner ring.
The stability and the smoothness of the structure are further improved, and the auxiliary pulleys on the support rod are symmetrically arranged on two sides of the sliding guide rail.
Under the irregular shape of sliding guide, do benefit to the drawing of patterns of moulding, first changeover portion is vertical setting, second changeover portion inclines to the left side and extends a section distance, third changeover portion is vertical setting, fourth changeover portion inclines to the right side and extends a section distance.
In order to ensure that the straight jacking block does not shake, the lifting synchronism and stability of the straight jacking block are further improved, the sliding guide rails are arranged on two sides of the track-changing guide block, and the tracks of the sliding guide rails on the two sides are identical and are staggered in an up-down relation.
In order to ensure the demolding efficiency of the plastic part in demolding, the plastic part can be directly taken out of the mold, and the transverse vector distance of the fourth transition section is greater than that of the second transition section.
In summary, the rear template is fixedly installed on the frame, after the plastic part is molded, the plastic part with the bulge or the groove in the lateral direction is frequently encountered, when the bulge or the groove in the lateral direction is large in size, the lateral core pulling mechanism is generally required to be adopted to realize the demolding of the plastic part, but because the automobile part is large in size, the lateral core pulling demolding is not suitable for being carried out in a factory building, the straight ejector block is required to lift the plastic part for demolding, in addition, the straight ejector block and the rear template are in a mutually matched state, and do not interfere with each other, so that when the bulge or the groove in the lateral direction is small in size, the elastic deformation of the plastic part can be adopted for forced demolding. The forced demolding is adopted to produce the plastic part, so that the mold structure can be simplified, the production cost can be reduced, and the aesthetic degree of the plastic part can be improved.
In the demolding process of the plastic part, the ejector rod drives the straight ejector block to separate from the rear template, the plastic part is pushed upwards in the separating process, and at the moment, the sliding limiting clamping groove on the supporting rod moves along the track of the sliding guide rail. The plastic part is deformed (by utilizing deformability of the plastic part) after being subjected to inward force of the straight jacking block, and as part of the plastic part is deformed and bent, a bulge or a groove on the plastic part can be separated from a die, the sliding limiting clamping groove continuously moves upwards and passes through the third transition section and then continuously moves along the fourth transition section, the straight jacking block is moved outwards in the process of moving along the fourth transition section, and the plastic part is completely separated from the straight jacking block at the moment, so that the demolding of the plastic part is completed.
The transverse vector distance of the fourth transition section is larger than that of the second transition section, so that the protrusion or the groove on the plastic part can be completely separated.
The auxiliary groove is matched with the large ball, the sliding limit clamping groove moves along the sliding guide rail, the auxiliary groove is matched with the large ball, the rotating rod is fixedly arranged in the supporting rod, when the supporting rod and the sliding guide rail relatively move, the ball cavities rotate on the sliding guide rail, the large ball is corresponding to the corresponding auxiliary groove, when the ball cavities rotate, the large ball can rotate due to friction force between the large ball and the auxiliary groove, the large ball can drive the small ball to rotate reversely while rotating, the rotating small ball can transmit the rotating force to the large ball on the other side, the rotating force is converted into a forward rotating force (namely, the rotating force is identical to the rotating force of the large ball on one side), the ball cavities can enable the movement of the supporting rod to be smooth more by utilizing the balls in the rotating process of the sliding guide rail, particularly, the supporting rod can be prevented from being dead on the sliding guide rail due to the limiting and conducting effects of the balls, in addition, the large ball can accurately rotate to enter the corresponding auxiliary groove in sequence, and can be prevented from being separated from the sliding guide rail to a certain extent.
The tracks of the sliding guide rails on the two sides are identical and are staggered in an up-down relation, so that the stability and the synchronism of the device in movement can be improved, the device can be kept stable in a plurality of directions by utilizing the staggered position relation, and the shaking in the movement process is avoided, so that the quality of a plastic part is influenced.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic view of a rear form in the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a front view of FIG. 1;
FIG. 4 is a schematic diagram of the cooperation structure of the rear mold plate and the straight top block in the present invention;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a front view of FIG. 4;
FIG. 7 is a schematic view of a guide mechanism;
FIG. 8 is a side view of FIG. 7;
FIG. 9 is a cross-sectional view taken along the direction A-A in FIG. 7;
Fig. 10 is an enlarged view at B in fig. 9;
FIG. 11 is a schematic view of the auxiliary pulley according to the present invention;
FIG. 12 is a cross-sectional view of an auxiliary pulley of the present invention;
fig. 13 is a schematic structural view of the slide rail.
Detailed Description
Referring to the accompanying drawings 1-13, the track-changing rear mold demolding device comprises a rear mold plate 1, wherein a straight jacking block 2 for demolding a mold is arranged on the rear mold plate 1, the straight jacking block 2 is driven to lift by a jacking rod 3, a guiding mechanism for changing the movement track of the straight jacking block 2 is arranged on the rear mold plate 1, the guiding mechanism comprises a track-changing guiding block 4 fixedly connected to the rear mold plate 1, a sliding guide rail 5 is fixedly connected to the track-changing guiding block 4, a supporting rod 7 is fixedly connected to the straight jacking block 2, a sliding limit clamping groove 6 clamped with the sliding guide rail 5 is arranged on the supporting rod 7, a plurality of auxiliary grooves 8 are uniformly and at intervals arranged on two sides of the sliding guide rail 5, and auxiliary pulleys 9 matched with the auxiliary grooves 8 are rotatably arranged in the limit clamping grooves.
In this embodiment, the rear mold plate 1 is fixedly mounted on the frame, after the plastic part is molded, the plastic part with the protrusion or the groove in the lateral direction is often encountered, when the size of the protrusion or the groove in the lateral direction is larger, the lateral core pulling mechanism is generally required to achieve the demolding of the plastic part, but because the size of the automobile part is larger, the lateral core pulling demolding is not suitable for being performed in a factory building, the straight ejector block 2 is required to lift the plastic part for demolding, and in addition, the straight ejector block 2 and the rear mold plate 1 are in a mutually matched state and do not interfere with each other, and because the mode is widely applied in the field, the shape and the matched state of the plastic part are not specifically limited, and when the size of the protrusion or the lateral groove is smaller, the elastic deformation of the plastic part can be adopted for forced demolding. The forced demolding is adopted to produce the plastic part, so that the mold structure can be simplified, the production cost can be reduced, and the aesthetic degree of the plastic part can be improved.
The sliding guide rail 5 is sequentially divided into a first transition section 51, a second transition section 52, a third transition section 53 and a fourth transition section 54 from bottom to top according to the demolding track, the sliding guide rail 5 is arranged on two sides of the track changing guide block 4, and the tracks of the sliding guide rails 5 on two sides are identical and are staggered in an up-down relationship.
The first transition section 51 is vertically arranged, the second transition section 52 is inclined to the left and extends for a certain distance, the third transition section 53 is vertically arranged, and the fourth transition section 54 is inclined to the right and extends for a certain distance.
In the demolding process of the plastic part, the ejector rod 3 drives the straight ejector block 2 to separate from the rear template 1, the plastic part is pushed upwards in the separating process, and the sliding limiting clamping groove 6 on the supporting rod 7 moves along the track of the sliding guide rail 5. The sliding limiting clamping groove 6 moves vertically upwards along the first transition section 51, the plastic part is lifted upwards and separated from the rear template 1 at the moment, the next step of sliding limiting clamping groove 6 moves to the second transition section 52, the straight jacking block 2 moves inwards slowly in the upward moving process, the plastic part deforms after being subjected to inward force of the straight jacking block 2 (deformability of the plastic part is utilized), the bulge or groove on the plastic part can be separated from the die due to deformation and bending of the plastic part, the sliding limiting clamping groove 6 continues to move upwards along the fourth transition section 54 after continuing to move upwards through the third transition section 53, the straight jacking block 2 moves outwards in the moving process along the fourth transition section 54, and the plastic part is completely separated from the straight jacking block 2 at the moment, so that demolding of the plastic part is completed.
It should be noted that the transverse vector distance of the fourth transition section 54 is greater than the transverse vector distance of the second transition section 52, so that the protrusion or the groove on the plastic part can be completely separated.
The auxiliary pulley 9 is rotatably mounted on the supporting rod 7 through the rotating rod 10, the auxiliary pulley 9 comprises a circular ball cavity rotatably mounted on the rotating rod 10, the ball cavity comprises an inner ring 91 and an outer ring 92, a plurality of large balls 93 are uniformly distributed in the cavity in the circumference, the large balls 93 and the inner ring 91 are arranged at intervals and protrude out of the outer ring 92, small balls 94 are arranged in the cavity between every two adjacent large balls 93, and the small balls 94 are attached to the inner ring 91.
The auxiliary pulleys 9 on the support rods 7 are symmetrically arranged on two sides of the sliding guide rail 5.
As shown in figures 10-12, the sliding guide rail 5 is provided with an auxiliary groove 8 and a large ball 93 which are matched with each other, while the sliding limit clamping groove 6 moves along the sliding guide rail 5, the auxiliary groove 8 and the large ball 93 are matched with each other, the rotary rod 10 is fixedly arranged in the supporting rod 7, when the supporting rod 7 and the sliding guide rail 5 relatively move, the ball cavities rotate on the sliding guide rail 5, the large ball 93 at the moment is correspondingly arranged in the corresponding auxiliary groove 8, when the ball cavities rotate, the large ball 93 rotates due to friction force between the large ball 93 and the auxiliary groove 8, the large ball 93 can drive the small ball 94 to reversely rotate while rotating, at the moment, the rotating small ball 94 can transmit partial rotating force to the large ball 93 on the other side, and the rotating force is converted into positive rotating force (namely the rotating force in the same direction as the large ball 93 on one side), the ball cavities can enable the movement of the supporting rod 7 to be more smooth in the process of rotating on the sliding guide rail 5, particularly, the abnormal shape of the sliding guide rail 5 can be utilized, the dead balls can be utilized to clamp the supporting rod 7 on the sliding guide rail 5, the supporting rod 7 can be blocked on the sliding guide rail 5 due to the friction force between the large ball 93 and the large ball 93, and the supporting rod can be prevented from entering the corresponding sliding guide rail 7 in the process, and the sliding guide rail 8 can be accurately rotated in turn.
In this embodiment, the tracks of the sliding guide rails 5 on two sides are the same and are staggered in an up-down relationship, so that the stability and synchronism of the device in moving can be increased, and the device can be kept stable in multiple directions by utilizing the staggered position relationship, so that the shaking in the moving process is avoided, and the quality of a plastic part is affected.
In summary, the present invention is not limited to the above embodiments. Those skilled in the art can make several changes and modifications without departing from the spirit and scope of the invention, and all such changes and modifications shall fall within the scope of the invention.
Claims (5)
1. The rail-changing rear mold demolding device comprises a rear mold plate, wherein a straight jacking block for demolding a mold is arranged on the rear mold plate and driven to lift by a jacking rod, and is characterized in that a guiding mechanism for changing the movement track of the straight jacking block is arranged on the rear mold plate, the guiding mechanism comprises a rail-changing guiding block fixedly connected to the rear mold plate, a sliding guide rail is fixedly connected to the rail-changing guiding block, a supporting rod is fixedly connected to the straight jacking block, and a sliding limiting clamping groove which is clamped with the sliding guide rail is formed in the supporting rod;
A plurality of auxiliary grooves are uniformly formed in the two sides of the sliding guide rail at intervals, and auxiliary pulleys matched with the auxiliary grooves are rotatably arranged in the limiting clamping grooves;
The auxiliary pulley is rotatably arranged on the supporting rod through the rotating rod, the auxiliary pulley comprises a circular ball cavity rotatably arranged on the rotating rod, the ball cavity is a closed cavity formed by an inner ring and an outer ring, a plurality of big balls are uniformly distributed in the cavity in the circumference, the big balls are arranged at intervals with the inner ring and protrude out of the outer ring, small balls are arranged in the cavity between every two adjacent big balls, and the small balls are attached to the inner ring;
The sliding guide rails are arranged on two sides of the track changing guide block, and the tracks of the sliding guide rails on the two sides are identical and are staggered in an up-down relation.
2. The back mold demolding device for the track-changing back mold of claim 1, wherein the sliding guide rail is divided into a first transition section, a second transition section, a third transition section and a fourth transition section from bottom to top in sequence according to the demolding track.
3. The back mold stripping device of claim 1, wherein the auxiliary pulleys on the support bar are symmetrically arranged on two sides of the sliding guide rail.
4. The back mold stripping device of claim 2, wherein the first transition section is vertically arranged, the second transition section is inclined to the left side and extends for a certain distance, the third transition section is vertically arranged, and the fourth transition section is inclined to the right side and extends for a certain distance.
5. The back mold stripping device as set forth in claim 2, wherein the fourth transition section has a greater lateral vector distance than the second transition section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211402146.XA CN116118064B (en) | 2022-11-10 | 2022-11-10 | A track-changing rear mold demoulding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211402146.XA CN116118064B (en) | 2022-11-10 | 2022-11-10 | A track-changing rear mold demoulding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116118064A CN116118064A (en) | 2023-05-16 |
| CN116118064B true CN116118064B (en) | 2025-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211402146.XA Active CN116118064B (en) | 2022-11-10 | 2022-11-10 | A track-changing rear mold demoulding device |
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| CN (1) | CN116118064B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113211742A (en) * | 2021-04-29 | 2021-08-06 | 浙江凯华模具有限公司 | Direct-ejection extrusion plastic part deformation back-off mechanism of automobile bumper injection mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010030842A (en) * | 1998-11-17 | 2001-04-16 | 데라마찌 아끼히로 | Linear motion guide apparatus and table guide apparatus |
| CN103552186B (en) * | 2013-11-05 | 2016-06-15 | 天津银宝山新科技有限公司 | Bumper demoulding Slanted ejecting component |
| CN205416261U (en) * | 2015-12-31 | 2016-08-03 | 江苏大通汽车模具零部件有限公司 | Substep pushes up structure to one side |
| CN106313451B (en) * | 2016-11-15 | 2018-09-04 | 昆山鸿永盛模具有限公司 | A kind of reverse buckle demolding mechanism |
| CN111086166B (en) * | 2018-10-23 | 2024-11-15 | 深圳市银宝山新科技股份有限公司 | Injection mold |
| CN109910252B (en) * | 2019-05-05 | 2024-06-11 | 深圳市银宝山新科技股份有限公司 | Mould pushes up mechanism to one side |
| CN110843180B (en) * | 2020-01-14 | 2020-04-03 | 宁波方正汽车模具股份有限公司 | Demoulding mechanism of instrument panel framework injection mould |
| CN210552820U (en) * | 2020-03-18 | 2020-05-19 | 常源科技（天津）有限公司 | Sequential demoulding mechanism with straight ejector block internally embedded with sliding block and ejector pin |
| CN214926547U (en) * | 2020-12-09 | 2021-11-30 | 台州麒铭模业有限公司 | Mechanical transformation guide mechanism for automotive interior panel die |
| CN215040651U (en) * | 2021-04-29 | 2021-12-07 | 昆山优美特电子科技有限公司 | Mould capable of quickly demoulding |
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2022
- 2022-11-10 CN CN202211402146.XA patent/CN116118064B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113211742A (en) * | 2021-04-29 | 2021-08-06 | 浙江凯华模具有限公司 | Direct-ejection extrusion plastic part deformation back-off mechanism of automobile bumper injection mold |
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| CN116118064A (en) | 2023-05-16 |
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