CN209987325U - Three-plate injection mold with core-pulling mechanism - Google Patents
Three-plate injection mold with core-pulling mechanism Download PDFInfo
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- CN209987325U CN209987325U CN201920794132.4U CN201920794132U CN209987325U CN 209987325 U CN209987325 U CN 209987325U CN 201920794132 U CN201920794132 U CN 201920794132U CN 209987325 U CN209987325 U CN 209987325U
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- pulling
- sliding block
- pulling block
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Abstract
A three-plate injection mold with a core-pulling mechanism comprises a movable mold plate, a fixed mold plate and the core-pulling mechanism arranged between the movable mold plate and the fixed mold plate, wherein the movable mold plate and the fixed mold plate form a mold cavity, the mold cavity forms a plastic part internal structure with the characteristic of an inner wall circular groove, a core-pulling block matched with the internal shape of the plastic part is arranged in the plastic part, and the core-pulling block comprises a first core-pulling block, a second core-pulling block and a middle driving block arranged between the first core-pulling block and the second core-pulling; one sides of the first core-pulling block and the second core-pulling block, which are far away from the mold cavity, are provided with locking limiting blocks for preventing falling and locking; the middle driving block is far mounted on the central sliding block, and the central sliding block is mounted on the movable template through a sliding block pressing strip; a delay core-pulling block is arranged in the plastic eave-shaped thin-wall notch, the delay core-pulling block is arranged on the central sliding block, and the delay core-pulling block is pulled by the small pull rod of the sliding block to control the core-pulling distance; this practicality has designed the cubic to inner wall ring groove characteristic and has loosed core to consider that moulding has eaves form thin wall breach characteristic, loose core its time delay, guaranteed to the at utmost that moulding is complete.
Description
Technical Field
The utility model relates to an injection mold field especially relates to a three board injection mold with mechanism of loosing core.
Background
Demoulding is a key factor influencing the final injection molding quality of a product, the design of a mould structure is a key for ensuring the final molding quality of the product, and more innovative designs are needed in the structural layout and the design of a demoulding structure; when the inner wall of the plastic part has the characteristics of four-side sealing property and two-side undercut positions, the annular groove is difficult to demold, and the undercut positions are usually thicker in wall thickness, large in shrinkage deformation and larger in packing force, so that a product is easily damaged or cracked by pulling during demolding; especially, when the plastic part has the characteristic that the plastic part can not simultaneously loose the core with the characteristic of the circular groove on the inner wall, the design of the core-pulling mechanism is more difficult.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the problem to prior art exists provides a three board injection mold that has to have corresponding mechanism of loosing core.
The utility model provides a technical scheme that above-mentioned technical problem adopted does:
a three-plate injection mold with a core-pulling mechanism comprises a movable mold plate, a fixed mold plate and the core-pulling mechanism arranged between the movable mold plate and the fixed mold plate, wherein a mold cavity is formed when the movable mold plate and the fixed mold plate are closed, the mold cavity forms a plastic part internal structure with the periphery closed and two sides at concave positions, a core-pulling block matched with the internal shape of the plastic part is arranged inside the plastic part, the core-pulling block comprises a first core-pulling block, a second core-pulling block and an intermediate driving block arranged between the first core-pulling block and the second core-pulling block, dovetail grooves are formed in opposite inclined planes of the first core-pulling block and the second core-pulling block, and the intermediate driving block is in sliding connection with the first core-pulling block and the second core-pulling block through self-matched dovetail groove; the end parts, far away from the mold cavity, of the first core pulling block and the second core pulling block are provided with convex parts extending in the opposite direction of the center of the plastic part, and the convex parts of the first core pulling block and the second core pulling block are clamped by locking limiting blocks; a concave part matched with the end part of the middle driving block far away from the die cavity is arranged in the central sliding block, and the end part of the middle driving block far away from the die cavity is installed in the concave part of the central sliding block through a screw; the two sides of the central sliding block are provided with sliding block pressing strips, the sliding block pressing strips form limit grooves matched with the central sliding block, the sliding block pressing strips are rectangular blocks with threaded through holes in the middle, and the central sliding block is installed on the movable template through the sliding block pressing strips; the plastic part eave-shaped thin-wall notch is characterized in that a delay core-pulling block is filled inside the plastic part eave-shaped thin-wall notch, the end part, far away from the die cavity, of the delay core-pulling block is installed on the central sliding block, one end of a small sliding block pull rod is fixed inside the central sliding block, the other end of the small sliding block pull rod is connected with the delay core-pulling block, and the small sliding block pull rod is.
Furthermore, the three-plate injection mold with the core-pulling mechanism further comprises an oil cylinder, the oil cylinder is installed on the side edge of the movable mold plate through an oil cylinder base, a sliding block pull rod sleeve is arranged on one side, close to the mold cavity, of the oil cylinder, the other side of the sliding block pull rod sleeve is fixedly connected with the central sliding block, and the sliding block pull rod sleeve is of a columnar stretchable structure.
Furthermore, a cooling air pipe is arranged inside the central sliding block, and a hose is arranged at an air inlet port of the cooling air pipe; the oil cylinder base is provided with an air faucet mounting column, an air faucet is arranged on the air faucet mounting column, and the air faucet is communicated with the cooling air pipe.
Further, a wear plate is arranged at the bottom of the central sliding block.
Furthermore, the locking limiting block is provided with four blocks, and the shapes of the locking limiting blocks are the same.
Compared with the prior art, the utility model adopts a three-time core-pulling mechanism to demold according to the characteristics of the peripheral sealing property and the lateral concave positions at two sides, in the mechanism, a central driving block is used to drive the bilateral formed parts to fold and core-pulling mode to realize the demolding of the groove, and the delayed differential core-pulling mode of the formed parts is used to avoid the demolding deformation of the plastic parts caused by large core-pulling demolding; meanwhile, aiming at the characteristic that the plastic part affects the characteristic of the annular groove on the inner wall of the loose core, the delayed loose core mode is adopted to ensure that the demoulding of the whole plastic part is more complete and smooth; the mould is air-cooled, and a cooling pipeline is arranged at a corresponding position so as to reduce the condition that a plastic part is adhered to a product; in addition, the mould is driven by an oil cylinder, so that the working stability is good; the die is reasonable in integral structure, ingenious in mechanism arrangement and capable of providing beneficial reference for die design of similar plastic parts.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an enlarged view of the position A of the present invention.
Fig. 3 is an exploded view of the core-pulling block, the central slider and the plastic part of the present invention.
Fig. 4 is a schematic view of the first core-pulling block and the second core-pulling block of the present invention.
Description of reference numerals:
1-moving the template; 2-fixing a template; 3-a core-pulling mechanism; 31-core extraction block; 311-a first core-pulling block; 312-a second core-pulling block; 3111-dovetail groove; 313-intermediate drive block; 3131-dovetail groove protrusions; 32-locking a limiting block; 33-a central slider; 34-slide block pressing strips; 35-a wear plate; 36-oil cylinder; 361-oil cylinder base; 37-a slider pull rod sleeve; 38-delayed core extraction; 39-small pull rod of slide block; 310-cooling air pipe; 3101-air tap mounting post; 3102-air tap; 4-molding;
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 4, the three-plate injection mold with a core-pulling mechanism comprises a movable mold plate 1, a fixed mold plate 2 and a core-pulling mechanism 3 arranged between the movable mold plate 1 and the fixed mold plate 2, wherein a mold cavity is formed when the movable mold plate 1 and the fixed mold plate 2 are closed, the mold cavity is used for forming an internal structure of a plastic part 4 with a closed periphery and concave positions at two sides, the internal structure is generally a tubular plastic part with a circular groove characteristic on the inner wall, a core-pulling block 31 matched with the internal shape of the plastic part 4 is arranged in the plastic part 4, the core-pulling block 31 comprises a first core-pulling block 311, the second core block 312 and the middle driving block 313 installed between the second core block and the first core block 311, the first core block 311 and the second core block 312 are provided with dovetail grooves 3111 on opposite inclined surfaces, and the middle driving block 313 is connected with the first core block 311 and the second core block 312 in a sliding manner through a dovetail groove convex part 3131 matched with the middle driving block 313, so as to provide power for the inward retraction movement of the first core block 311 and the second core block 312 towards the center.
One sides of the first core block 311 and the second core block 312, which are far away from the mold cavity, are provided with locking limiting blocks 32 for preventing the first core block and the second core block from falling off, and the locking limiting blocks 32 are cylindrical bodies; the end parts, far away from the plastic part 4, of the first core-pulling block 311 and the second core-pulling block 312 are provided with convex parts extending far away from the center of the plastic part 4, the locking limiting block 32 is embedded into the convex parts of the first core-pulling block 311 and the second core-pulling block 312, core-pulling motion power is provided for the first core-pulling block 311 and the second core-pulling block 312, and the locking limiting block 32 plays a role in limiting core-pulling sliding travel.
The middle driving block 313 is arranged on the central sliding block 33 through a screw, and a concave part matched with the end part of the middle driving block 313 far away from the plastic part 4 is arranged in the central sliding block 33; the two sides of the central sliding block 33 are provided with sliding block pressing strips 34, the sliding block pressing strips 34 form a limiting groove matched with the central sliding block 33, the sliding block pressing strips 34 are rectangular blocks with threaded through holes in the middle, and the central sliding block 33 is installed on the movable die plate 1 of the die through the sliding block pressing strips 34; a wear plate 35 is also provided at the bottom of the central slider 33 to prevent sliding wear of the central slider 33.
The oil cylinder 36 is mounted on the side of the movable die plate 1 through an oil cylinder base 361, a slide block pull rod sleeve 37 is arranged on one side of the oil cylinder 36 close to the die cavity, the other side of the slide block pull rod sleeve 37 is fixedly connected with the central slide block 33, the slide block pull rod sleeve 37 is of a columnar stretchable structure, the central slide block 33 is driven by the oil cylinder 36 through the slide block pull rod sleeve 37, and the slide block pull rod sleeve 37 is used for adjusting the central slide block 33 to a proper position so as to achieve the slide block demoulding and core pulling effects.
Aiming at the characteristic that the upper part of the tubular characteristic of the plastic part 4 is also provided with an eave-shaped thin-wall gap, core pulling is carried out after the core pulling of the tubular characteristic is finished, otherwise, the demoulding deformation of the plastic part 4 is caused; the corresponding characteristic of the plastic part 4 is filled with a delay core-pulling block 38, the end part of the delay core-pulling block 38 far away from the plastic part 4 is arranged on the central slide block 33, the end part is pulled by a small slide block pull rod 39 to control the separation distance of the delay core-pulling block 38 and the small slide block pull rod 39 in the core-pulling direction, one end of the small slide block pull rod 39 is fixed in the central slide block 33, the other end of the small slide block pull rod 39 is connected with the delay core-pulling block 38, and the small slide block pull rod 39 is of.
A cooling air pipe 310 is arranged in the central sliding block 33, and a hose is arranged at an air inlet of the cooling air pipe 310; an air nozzle mounting column 3101 is arranged on the oil cylinder base 361, an air nozzle 3102 is arranged on the air nozzle mounting column 3101, the air nozzle 3102 is communicated with the cooling air pipe 310, and air is introduced into the cooling air pipe 310 by the air nozzle 3102 to cool the intermediate driving block 313 of the central sliding block 33.
When the mechanism works, the oil cylinder 36 drives the central slide block 33 to firstly loose core, and the central slide block 33 drives the first core-pulling block 311 and the second core-pulling block 312 to loose core through the inner wall ring groove on the inner wall by driving the middle driving block 313 through the dovetail groove 3111 on the central slide block; the specific driving process is that the middle driving block 313 is driven by the oil cylinder 36 to move away from the plastic part 4, the first core block 311 and the second core block 312 both have a tendency of moving in the same direction as the middle core block 31 because of being connected with the middle driving block 313 in a sliding manner through the dovetail groove 3111, but the locking limiting block 32 limits the movement of the first core block 311 and the second core block 312 in the direction away from the plastic part 4, the movement of the two core blocks 31 is changed to be close to the center of the plastic part 4 along the direction of the inclined plane of the dovetail groove 3111, and when the two core blocks 31 are close to a certain degree and are separated from the limitation of the locking limiting block 32, the two core blocks 31 are pulled out along the middle driving block 313; meanwhile, when the central slide block 33 is firstly pulled out, the delayed core-pulling block 38 is not pulled out firstly due to the tight wrapping of the plastic part 4, and after the middle driving block 313 is pulled out for a certain distance, the small pull rod 39 of the slide block pulls the delayed core-pulling block 38 to be pulled out together, so that the demoulding deformation of the plastic part 4 caused by synchronous core pulling can be prevented. The demoulding corresponding to the three core pulling actions of the mechanism is as follows: the first core-back of the intermediate drive block 313, the second core-back of the first core-back block 311 and the second core-back block 312, and the third core-back of the core-back block 38 are delayed.
The utility model discloses a three-plate injection mold with a core-pulling mechanism has designed a special core-pulling mechanism 3 for a plastic part 4 with a vertical special-shaped hole slot characteristic in the pipe, and utilizes a time-delay differential core-pulling mode of the molded part to avoid the deformation of the plastic part 4 caused by large core-pulling and demoulding; and considering that the plastic part 4 has the characteristic of an eave-shaped thin-wall gap and cannot simultaneously loose core with the tubular characteristic, a delayed core-pulling mode is designed, and the complete demolding of the plastic part 4 is ensured to the greatest extent.
Finally, it should be noted that: the above embodiments are merely illustrative of the technical solutions of the present invention, and not limitative thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. The utility model provides a three board injection mold with mechanism of loosing core, includes movable mould board (1), fixed die plate (2) and sets up mechanism of loosing core (3) between movable mould board (1) and fixed die plate (2), its characterized in that: the die comprises a movable die plate (1), a fixed die plate (2) and a die cavity, wherein the movable die plate (1) and the fixed die plate (2) form the die cavity when the die cavity is matched, the die cavity forms an internal structure of a plastic part (4) with the periphery closed and two side concave positions, a core pulling block (31) matched with the internal shape of the plastic part (4) is arranged in the plastic part (4), the core pulling block (31) comprises a first core pulling block (311), a second core pulling block (312) and an intermediate driving block (313) arranged between the first core pulling block and the second core pulling block, dovetail grooves (3111) are formed in opposite inclined planes of the first core pulling block (311) and the second core pulling block (312), and the intermediate driving block (313) is in sliding connection with the first core pulling block (311) and the second core pulling block (312) through; the ends, far away from the die cavity, of the first core block (311) and the second core block (312) are provided with convex parts extending in the opposite direction of the center of the plastic part (4), and the convex parts of the first core block (311) and the second core block (312) are clamped by a locking limiting block (32); a concave part matched with the end part of the middle driving block (313) far away from the die cavity is arranged in the central sliding block (33), and the end part of the middle driving block (313) far away from the die cavity is installed in the concave part of the central sliding block (33) through a screw; sliding block pressing strips (34) are arranged on two sides of the central sliding block (33), the sliding block pressing strips (34) form a limiting groove matched with the central sliding block (33), the sliding block pressing strips (34) are rectangular blocks with threaded through holes in the middle, and the central sliding block (33) is installed on the movable template (1) through the sliding block pressing strips (34); the plastic part (4) is filled with a delay core-pulling block (38) in the eave-shaped thin-wall gap characteristic, the end part, far away from the die cavity, of the delay core-pulling block (38) is installed on the central sliding block (33), one end of a small sliding block pull rod (39) is fixed in the central sliding block (33), the other end of the small sliding block pull rod is connected with the delay core-pulling block (38), and the small sliding block pull rod (39) is of a columnar stretchable structure.
2. The three-plate injection mold with the core-pulling mechanism according to claim 1, wherein the three-plate injection mold with the core-pulling mechanism further comprises an oil cylinder (36), the oil cylinder (36) is mounted on the side edge of the movable mold plate (1) through an oil cylinder base (361), a slide block pull rod sleeve (37) is arranged on one side of the oil cylinder (36) close to the mold cavity, the other side of the slide block pull rod sleeve (37) is fixedly connected with the central slide block (33), and the slide block pull rod sleeve (37) is of a columnar stretchable structure.
3. The three-plate injection mold with the core-pulling mechanism according to claim 2, wherein a cooling air pipe (310) is arranged inside the central slider (33), and a hose is arranged at an air inlet port of the cooling air pipe (310); an air nozzle mounting column (3101) is arranged on the oil cylinder base (361), an air nozzle (3102) is arranged on the air nozzle mounting column (3101), and the air nozzle (3102) is communicated with the cooling air pipe (310).
4. A three-plate injection mold with a core-pulling mechanism according to claim 1, characterized in that the bottom of the central slide (33) is provided with a wear plate (35).
5. The three-plate injection mold with a core pulling mechanism according to claim 1, wherein the locking stoppers (32) are four, and each locking stopper (32) has the same shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920794132.4U CN209987325U (en) | 2019-05-29 | 2019-05-29 | Three-plate injection mold with core-pulling mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920794132.4U CN209987325U (en) | 2019-05-29 | 2019-05-29 | Three-plate injection mold with core-pulling mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209987325U true CN209987325U (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920794132.4U Expired - Fee Related CN209987325U (en) | 2019-05-29 | 2019-05-29 | Three-plate injection mold with core-pulling mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209987325U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306098A (en) * | 2021-07-29 | 2021-08-27 | 宁波明飞汽车零部件有限公司 | A mould for car central channel skeleton |
| CN113619040A (en) * | 2021-08-23 | 2021-11-09 | 广东东亚电器有限公司 | Automobile injection molding part mold formed by air cooling |
-
2019
- 2019-05-29 CN CN201920794132.4U patent/CN209987325U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306098A (en) * | 2021-07-29 | 2021-08-27 | 宁波明飞汽车零部件有限公司 | A mould for car central channel skeleton |
| CN113619040A (en) * | 2021-08-23 | 2021-11-09 | 广东东亚电器有限公司 | Automobile injection molding part mold formed by air cooling |
| CN113619040B (en) * | 2021-08-23 | 2023-09-22 | 广东东亚电器有限公司 | Automobile injection molding die formed by air cooling |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200124 Termination date: 20200529 |