CN107571464B - Multidirectional core-pulling mold - Google Patents
Multidirectional core-pulling mold Download PDFInfo
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- CN107571464B CN107571464B CN201711005442.5A CN201711005442A CN107571464B CN 107571464 B CN107571464 B CN 107571464B CN 201711005442 A CN201711005442 A CN 201711005442A CN 107571464 B CN107571464 B CN 107571464B
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- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 239000000047 product Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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Abstract
The invention relates to a multidirectional core-pulling mold, which is provided with a slide block core-pulling mechanism: firstly, the slide block seat is movably connected with the outer core-pulling slide block, namely, in the process of opening and closing the die, the slide block seat is separated from an initial position by a certain distance, and then the outer core-pulling slide block is driven by a limiting device to be demoulded; secondly, a secondary core-pulling sliding block is arranged on the outer core-pulling sliding block, a secondary inclined guide pillar is arranged on the sliding block seat, and the secondary core-pulling sliding block and the secondary inclined guide pillar are matched to form a guide pillar-sliding block core-pulling mechanism, so that secondary core-pulling die opening is realized; the die is simpler, the problem of die collision caused by faults is avoided, and the die fault rate is reduced.
Description
Technical Field
The invention belongs to the technical field of mold manufacturing, and particularly relates to a multidirectional core-pulling mold which is provided with a core-pulling action perpendicular to the center position of a core-pulling direction of a product.
Background
In the prior art, for complex valve body injection molding products, the structure is complex, threads or cavities are arranged in multiple directions, the injection mold is often required to have core pulling actions perpendicular to the core pulling direction of the product at the center position of the core pulling direction, and the moving rails of the injection mold form actual intersections.
In the multidirectional core-pulling mold, the action of opening and closing the mold requires that the previous core-pulling is completed before the next action is performed; therefore, in the conventional design, the core pulling can adopt a mode of sliding blocks and inclined guide posts, or adopts a mode of oil cylinder core pulling and sliding blocks.
Referring to fig. 1, the valve body tube 9 is a four-way tube, the valve body tube 9 has a through fluid cavity 91, an opening end of the fluid cavity 91 has an inner tube 92 protruding out of the valve body tube 9, and an annular connecting groove is formed on an outer wall surface of the inner tube 92; in the process of opening the injection molding of the valve body pipe 9, firstly, the open end of the fluid chamber 91 needs to be provided with a core-pulling in the horizontal direction, and the connecting groove of the inner pipe 92 needs to be formed by a core in the vertical direction, so the mold has three core-pulling directions: horizontal to the left, vertically upward, and vertically downward.
If the slider and the inclined guide post are adopted, and in combination with fig. 2, the injection mold is used for forming the valve body pipe 9 in fig. 1, the slider and the corresponding inclined guide post cannot be located on the same base together with the core pulling device by adopting the slider and the inclined guide post to form the valve body pipe 9.
The fixed die is provided with an A plate 3 and a first loose core 30 penetrating through the A plate 3; the movable die is provided with a movable die plate 1 and a pushing plate 2, and a second core pulling 10 is arranged on the movable die plate 1 and penetrates through the pushing plate 2; the third core pulling 4 is movably arranged on the pushing plate 2, and correspondingly, an inclined guide post 31 which can be inserted into the third core pulling 4 is arranged on the plate A3; thereby forming three groups of core pulling mechanisms with different directions. The mould requires three groups of core pulling mechanisms to move in a specific sequence, namely, the original path is returned, so that a set of control mechanism is further needed to be made to ensure the mould opening sequence of the mould. The mould is thus complicated.
In other implementations, the motion sequence control can be realized by using an oil cylinder, but the typical characteristic of the oil cylinder is that the speed-time curve is not well controlled, the instantaneous speed is high, and the stroke is difficult to accurately control. Which ultimately depends substantially on the inductive switch. And problems will follow when the inductive switch is faulty or inaccurate. The light mold is not opened, and the heavy slide blocks are mutually crashed.
Therefore, the mechanical structure is used for replacing the electronic structure continuously, and the core pulling sequence of the open and close mold is realized, so that the service life of the mold is prolonged.
Disclosure of Invention
The invention aims to provide a multidirectional core-pulling die, which solves the problems of complex sequential control mechanism, low control precision and high die failure rate of the conventional multiaxial core-pulling die.
The specific scheme is as follows: a multidirectional core-pulling mold comprises a movable mold, a fixed mold and a slide block core-pulling mechanism, wherein the slide block core-pulling mechanism can be movably arranged on the movable mold or the fixed mold; the slide block core-pulling mechanism comprises a slide block seat and an outer side core-pulling slide block arranged on the slide block seat; the outer core-pulling sliding block can be movably arranged on the sliding block seat through a limiting device; a spring for separating the slide block seat and the outer core-pulling slide block is also arranged between the slide block seat and the outer core-pulling slide block; the slide block core-pulling mechanism is also provided with a secondary core-pulling device, the secondary core-pulling device comprises a secondary core-pulling slide block and a secondary inclined guide post which is matched with the secondary core-pulling slide block, the secondary inclined guide post is fixed on the slide block seat, and the secondary core-pulling slide block can be movably arranged on the outer side core-pulling slide block; and in the mold closing state, the secondary inclined guide post is inserted into the secondary core-pulling slide block so as to drive the secondary core-pulling slide block to move relative to the outer core-pulling slide block when the slide block seat is separated from the outer core-pulling slide block.
Further, the demolding moving direction of the secondary core-pulling sliding block is perpendicular to the demolding moving direction of the outer core-pulling sliding block.
Further, the slide block seat is also provided with a central core pulling, and the secondary inclined guide post comprises a lower inclined guide post and an upper inclined guide post which are respectively arranged at the upper side and the lower side of the central core pulling; correspondingly, the secondary core-pulling sliding block comprises an upper core-pulling sliding block and a lower core-pulling sliding block which are arranged up and down.
Further, one end of the slide block core pulling mechanism, which is away from the die opening surface, is defined as the lower end, and a supporting block is further arranged at the lower end of the slide block core pulling mechanism; the supporting block is fixed on the sliding block seat, and in the die assembly state, the supporting block protrudes to the lower side of the lower core-pulling sliding block.
Further, the tail end of the supporting block is provided with a supporting inclined plane which is parallel to the inclined direction of the lower inclined guide post; correspondingly, the bottom end of the lower core pulling sliding block is parallel to the supporting inclined plane.
Further, the slide block core pulling mechanism is arranged on the movable die, and a primary inclined guide post is arranged on the fixed die at a position corresponding to the slide block seat;
Or alternatively
The slide block core-pulling mechanism can be movably arranged on the movable die or the fixed die, a core-pulling oil cylinder is arranged on the movable die or the fixed die, and a piston rod of the core-pulling oil cylinder is connected to the slide block seat.
Further, the limiting device comprises a limiting bolt, the limiting bolt penetrates through the sliding block seat and is arranged on the outer core-pulling sliding block in a back threaded manner; the limit bolt can perform limited stroke movement relative to the slide block seat, so that the outer core-pulling slide block can be movably arranged on the slide block seat.
Further, the spring is a pressing spring, the sliding block seat and the outer core-pulling sliding block are matched to form a spring installation cavity, and the pressing spring is arranged in the spring installation cavity so as to apply an acting force far away from the sliding block seat to the outer core-pulling sliding block, so that the sliding block seat and the outer core-pulling sliding block are separated.
According to the multidirectional core-pulling mold, the slide block core-pulling mechanism is arranged: firstly, the slide block seat is movably connected with the outer core-pulling slide block, namely, in the process of opening and closing the die, the slide block seat is separated from an initial position by a certain distance, and then the outer core-pulling slide block is driven by a limiting device to be demoulded; secondly, a secondary core-pulling sliding block is arranged on the outer core-pulling sliding block, a secondary inclined guide pillar is arranged on the sliding block seat, and the secondary core-pulling sliding block and the secondary inclined guide pillar are matched to form a guide pillar-sliding block core-pulling mechanism, so that secondary core-pulling die opening is realized; preferably, the secondary core-pulling sliding block inserted in the cross manner is arranged in the outer core-pulling sliding block, so that multidirectional die opening core pulling in the vertical direction and the horizontal direction is realized, original elements such as a material pushing plate, a sequence control mechanism and a sequence controller are omitted, and the die is simpler; meanwhile, even if the lateral core-pulling sliding block does not move in place, the sliding block inclined surface of the fixed die can sleeve the lateral core-pulling sliding block, and the inclined surface angle of the sliding block is larger than that of the secondary core-pulling sliding block, so that the lateral core-pulling sliding block can continue to move and finally die assembly is safe. That is, the movement distance of the cylinder may have a larger range; or the secondary inclined guide post is supposed to be damaged, and finally, the product is just pulled out, so that the problem of die collision due to faults is avoided, and the die fault rate is reduced.
Drawings
FIG. 1 shows a schematic diagram of a prior art valve body tube structure;
FIG. 2 shows a partial cross-sectional view of a prior art valve body tube injection mold;
Fig. 3 shows a schematic structural diagram of a connecting cylinder of a core pulling mechanism of a slide block according to an embodiment of the invention;
FIG. 4 shows another view angle structure of FIG. 3;
FIG. 5 shows a cross-sectional view of a secondary core-pulling device of a slider core-pulling mechanism according to an embodiment of the present invention;
FIG. 6 shows a cross-sectional view of a slider core-pulling mechanism limiting device according to an embodiment of the present invention;
FIG. 7 shows an exploded front view of a slider core pulling mechanism according to an embodiment of the present invention;
Fig. 8 is an exploded view of the slider core pulling mechanism according to the embodiment of the invention.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The invention will now be further described with reference to the drawings and detailed description.
As shown in fig. 3, this embodiment provides a multidirectional core-pulling mold including a movable mold (not shown in the drawings), a stationary mold (not shown in the drawings), and a slider core-pulling mechanism 5, the slider core-pulling mechanism 5 being movably provided on the movable mold.
Referring to fig. 5 and 6, the slide core pulling mechanism 5 includes a slide base 51 and an outer core pulling slide 52 movably mounted on the slide base 51; the outer core-pulling sliding block 52 is movably mounted on the sliding block seat 51 through a limiting device, specifically, the limiting device is a limiting bolt, the sliding block seat 51 is provided with a through hole 511 with a contracted aperture, the through hole is contracted in a step shape, one end of the through hole, which is away from the outer core-pulling sliding block 52, is slightly larger than the protruding tail part of the limiting bolt, the other end of the through hole is adapted to the screw part of the limiting bolt, the screw part of the limiting bolt penetrates through the sliding block seat 51 through the through hole 511, and is then screwed and mounted on the outer core-pulling sliding block 52; the tail of the limit bolt is arranged in the through hole 511, and further can perform limited stroke movement relative to the slide block seat 51, so that the outer core-pulling slide block 52 can be movably arranged on the slide block seat 51.
A pressing spring for separating the two is further arranged between the slide block seat 51 and the outer core-pulling slide block 52: the sliding block seat 51 and the outer core-pulling sliding block 52 cooperate to form a spring mounting cavity 512, the pressing spring is arranged in the spring mounting cavity 512, and two ends of the pressing spring respectively prop against the sliding block seat 51 and the outer core-pulling sliding block 52 so as to apply an acting force far away from the sliding block seat 51 to the outer core-pulling sliding block 52 to realize the separation of the sliding block seat 51 and the outer core-pulling sliding block 52.
Preferably, for simplifying the processing, the slider seat 51 is provided with a fixing plate 510, one end of the spring mounting cavity 512 is disposed on the fixing plate 510, and the narrow hole Duan Sheyu of the through hole 511 is disposed on the fixing plate 510; and the through holes 511 and the spring mounting cavities 512 are all parallel to the die-opening moving direction of the outside core-pulling slide block 52.
In this embodiment, the fixing plate 510 is a rectangular plate, and the spring mounting cavity 512 has four top corners disposed near the fixing plate 510; four through holes 511 are provided, and correspondingly, four limit bolts are provided, and the through holes 511 are arranged at positions corresponding to the centers of four edges of the fixing plate 510.
As shown in fig. 3 to 8, the slider core-pulling mechanism 5 is further provided with a secondary core-pulling device, and the direction facing the fixed mold is taken as the upper direction, so that the secondary core-pulling device comprises two secondary core-pulling sliders and two secondary inclined guide columns, the two secondary inclined guide columns are correspondingly fixed on the fixed plate 510, and one inclined guide column is correspondingly inserted into one secondary core-pulling slider to form a secondary slider-guide column core-pulling mechanism arranged in the slider core-pulling mechanism 5.
Specifically, the two secondary oblique guide posts are an upper oblique guide post 513 and a lower oblique guide post 514 which are arranged up and down respectively, the upper oblique guide post 513 and the lower oblique guide post 514 are both arranged on the fixing plate 510, and then the fixing plate 510 is positioned by a pin and is fixedly arranged on the sliding block seat 51. In this embodiment, the upper oblique guide post 513 extends obliquely upward toward the position of the injection molding, and the lower oblique guide post 513 extends obliquely downward toward the position of the injection molding, thereby forming two core pulling directions facing away.
The two secondary core-pulling sliding blocks are respectively an upper core-pulling sliding block 53 and a lower core-pulling sliding block 54 which are arranged up and down, the outer core-pulling sliding block 52 is provided with a vertically extending and vertically penetrating mounting hole, and the upper core-pulling sliding block 53 and the lower core-pulling sliding block 54 are arranged up and down and can be movably arranged in the mounting hole, and are further arranged on the outer core-pulling sliding block 52.
Correspondingly, the upper core-pulling slide block 53 and the lower core-pulling slide block 54 are respectively provided with inclined guide pillar holes, and inclined sections of the upper inclined guide pillar 513 and the lower inclined guide pillar 514 are respectively inserted into the upper core-pulling slide block 53 and the lower core-pulling slide block 54 in a mold clamping state, so that when the slide block seat 51 is separated from the outer core-pulling slide block 52, the two secondary core-pulling slide blocks are driven to move relative to the outer core-pulling slide block 52, and the upper core-pulling slide block 53 vertically and upwardly pulls the core, and the lower core-pulling slide block 54 vertically and downwardly pulls the core.
In this embodiment, the mounting hole penetrates the outer core-pulling slide block 52 up and down, and in the mold clamping state, the upper core-pulling slide block 53 is pressed by the fixed mold, so that locking and fixing of the mold clamping position are realized. In order to realize locking and fixing of the die assembly position of the lower core-pulling slide block 54, the lower end of the slide block core-pulling mechanism 5 is also provided with a supporting block 55: the supporting block 55 is fixed on the slide block seat 51, and in the mold closing state, the free end of the supporting block 55 protrudes below the lower core-pulling slide block 54, wherein preferably, the upper side of the free end of the supporting block 55 has a supporting inclined plane extending obliquely, the supporting inclined plane is parallel to the inclined direction of the lower inclined guide pillar 514, and the bottom end of the lower core-pulling slide block 54 is inclined parallel to the supporting inclined plane, so as to realize the supporting and fixing of the lower core-pulling slide block 54.
In this embodiment, the demolding movement direction of the upper core-pulling slider 53 and the lower core-pulling slider 54 of the secondary core-pulling slider is perpendicular to the demolding movement direction of the outer core-pulling slider 52; and the slide block seat 51 is also provided with a central core-pulling block 56 extending along the demoulding moving direction of the outer core-pulling slide block 52, and the upper core-pulling slide block 53 and the lower core-pulling slide block 54 are respectively arranged on the upper side and the lower side of the central core-pulling block 56. Similarly, the central core 56 and the supporting block 55 are mounted on the slider seat 51 through the fixing plate 510.
Because the built-in slide block-inclined guide pillar core pulling mechanism is adopted, the size design of the inclined guide pillar is limited, in order to realize the best fixing effect, guide pillar holes on the upper core pulling slide block 53 and the lower core pulling slide block 54 are arranged in a penetrating way, and the positions corresponding to the tail ends of the guide pillar holes in the die assembly state on the outer core pulling slide block 52 are also provided with insertion holes, the tail ends of the upper inclined guide pillar 513 and the lower inclined guide pillar 514 are respectively provided with an insertion block extending along the moving direction of the slide block seat 51, and the insertion blocks are correspondingly inserted into the insertion holes, so that the fixing of the end parts of the upper inclined guide pillar 513 and the lower inclined guide pillar 514 is realized.
In this embodiment, the slide core-pulling mechanism 5 is movably disposed on a movable mold, and a core-pulling cylinder 6 is disposed on the movable mold, and a piston rod of the core-pulling cylinder 6 is connected to the slide block seat 51 to realize driving of the slide core-pulling mechanism 5. It will be appreciated that in other embodiments, the cylinder element may be omitted, specifically, the slide core-pulling mechanism is disposed on the movable mold, and a primary oblique guide pillar is disposed on the fixed mold corresponding to the position of the slide seat, so as to form a primary slide-guide pillar core-pulling mechanism for implementing driving of the slide core-pulling mechanism 5.
The working procedure of this example is as follows:
a: opening a die of the injection molding machine, and separating a fixed die plate on the fixed die from a movable die plate on the movable die; the top end of the upper core-pulling slide block 53 is released;
b: the core-pulling oil cylinder 6 acts, the sliding block seat 51 moves outwards, and meanwhile, the central core-pulling 56 is driven to move outwards; the slide block seat 51 synchronously drives the upper inclined guide pillar 513 and the lower inclined guide pillar 514 to move continuously so as to act on the upper core-pulling slide block 53 and the lower core-pulling slide block 54; simultaneously, the supporting blocks 55 synchronously move outwards, the lower core-pulling sliding blocks 54 are not supported any more, and the upper end surface of the upper core-pulling sliding blocks 53 is not supported any more due to the separation of the fixed die, so that the upper core-pulling sliding blocks and the lower core-pulling sliding blocks synchronously move upwards and downwards and are finally separated from a product;
In the process, the outer core-pulling sliding block 52 is separated from the sliding block seat 51 under the action of the internal pressure spring and the holding force of the front end product, and the secondary core-pulling device does not act and stays in place continuously;
C: after the upper core-pulling slide block 53 and the lower core-pulling slide block 54 are separated, the outer core-pulling slide block 52 moves outwards together with the slide block seat 51 under the action of the limit screw rod until reaching the end position. The outer core-pulling slide block 52 is opened.
D: and (5) ejecting the product.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A multidirectional core-pulling mold comprises a movable mold, a fixed mold and a slide block core-pulling mechanism, wherein the slide block core-pulling mechanism can be movably arranged on the movable mold or the fixed mold; the slide block core-pulling mechanism comprises a slide block seat and an outer side core-pulling slide block arranged on the slide block seat; the method is characterized in that:
The outer core-pulling sliding block can be movably arranged on the sliding block seat through a limiting device;
a spring for separating the slide block seat and the outer core-pulling slide block is also arranged between the slide block seat and the outer core-pulling slide block;
The slide block core-pulling mechanism is also provided with a secondary core-pulling device, the secondary core-pulling device comprises a secondary core-pulling slide block and a secondary inclined guide post which is matched with the secondary core-pulling slide block, the secondary inclined guide post is fixed on the slide block seat, and the secondary core-pulling slide block can be movably arranged on the outer side core-pulling slide block;
The secondary inclined guide post is inserted into the secondary core-pulling sliding block in a die closing state so as to drive the secondary core-pulling sliding block to move relative to the outer core-pulling sliding block when the sliding block seat is separated from the outer core-pulling sliding block;
the demoulding moving direction of the secondary core-pulling sliding block is perpendicular to the demoulding moving direction of the outer core-pulling sliding block;
The limiting device comprises a limiting bolt, the limiting bolt penetrates through the sliding block seat and is arranged on the outer core-pulling sliding block in a back threaded manner; the limit bolt can perform limited stroke movement relative to the slide block seat, so that the outer core-pulling slide block can be movably arranged on the slide block seat.
2. The multidirectional core-pulling mold according to claim 1, wherein: the slide block seat is also provided with a central core pulling device, and the secondary inclined guide posts comprise lower inclined guide posts and upper inclined guide posts which are respectively arranged at the upper side and the lower side of the central core pulling device; correspondingly, the secondary core-pulling sliding block comprises an upper core-pulling sliding block and a lower core-pulling sliding block which are arranged up and down.
3. The multidirectional core-pulling mold according to claim 2, wherein: defining one end of the slide block core pulling mechanism, which is away from the die opening surface, as the lower end, wherein the lower end of the slide block core pulling mechanism is also provided with a supporting block; the supporting block is fixed on the sliding block seat, and in the die assembly state, the supporting block protrudes to the lower side of the lower core-pulling sliding block.
4. The multi-directional core-pulling mold according to claim 3, wherein: the tail end of the supporting block is provided with a supporting inclined plane which is parallel to the inclined direction of the lower inclined guide post; correspondingly, the bottom end of the lower core pulling sliding block is parallel to the supporting inclined plane.
5. The multidirectional core-pulling mold according to claim 1, wherein: the slide block core pulling mechanism is arranged on the movable die, and a primary inclined guide post is arranged on the fixed die at a position corresponding to the slide block seat;
Or alternatively
The slide block core-pulling mechanism can be movably arranged on the movable die or the fixed die, a core-pulling oil cylinder is arranged on the movable die or the fixed die, and a piston rod of the core-pulling oil cylinder is connected to the slide block seat.
6. The multidirectional core-pulling mold according to claim 1, wherein: the spring is a pressing spring, the sliding block seat and the outer core-pulling sliding block are matched to form a spring installation cavity, and the pressing spring is arranged in the spring installation cavity so as to apply an acting force far away from the sliding block seat to the outer core-pulling sliding block, so that the sliding block seat and the outer core-pulling sliding block are separated.
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CN109093953B (en) * | 2018-10-12 | 2020-05-19 | 中山市利群精密实业有限公司 | Multidirectional demoulding mechanism for plastic product back-off pipe orifice |
CN109822836B (en) * | 2019-01-31 | 2020-07-28 | 宁波太中塑业有限公司 | Abdicating core-pulling demoulding mechanism of injection mould and demoulding method thereof |
CN110815748B (en) * | 2019-12-05 | 2021-05-11 | 宁海县德高精密模具有限公司 | Internal-shrinkage core-pulling injection mold of planar four-way joint |
CN114074409B (en) * | 2020-08-21 | 2023-11-14 | 苏州汉扬精密电子有限公司 | Core-pulling demoulding structure of inclined hollow convex column |
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