CN215203190U - Insert assembly for preventing gas trapping of injection molding melt and mold thereof - Google Patents
Insert assembly for preventing gas trapping of injection molding melt and mold thereof Download PDFInfo
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- CN215203190U CN215203190U CN202120706881.4U CN202120706881U CN215203190U CN 215203190 U CN215203190 U CN 215203190U CN 202120706881 U CN202120706881 U CN 202120706881U CN 215203190 U CN215203190 U CN 215203190U
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Abstract
The utility model relates to the field of injection molds, in particular to an insert component for preventing gas trapping of injection molding melt, which comprises a fixed seat, a movable insert arranged in the fixed seat and an elastic piece connecting the movable insert and the fixed seat; the elastic piece pushes the movable insert to slide along the fixed seat; the fixed seat is used for being installed in a lower die of the die, and the elastic piece is used for pushing the movable insert to a feeding port of the upper die of the stopper. When the product with the large wall thickness is produced in an injection molding mode, the plastic melt can be uniformly dispersed towards the cavity wall of the mold cavity on the mold due to the reaction force of the movable insert, so that the mold can be normally injected, the product can be normally formed, and the qualification rate and the performance of the product are guaranteed.
Description
Technical Field
The utility model relates to an injection mold field, more specifically relates to a mold insert subassembly and mould for preventing injection molding fuse-element is stranded gas.
Background
When part product carries out the production of moulding plastics, because the wall thickness ratio of product is great, when the fuse-element of moulding plastics just got into the die cavity, mould die cavity inner space is big, and the fuse-element of injecting into can not evenly scatter, but becomes irregular rolling to one side, causes the phenomenon of the extremely easy trapping of gas in the die cavity, and product appearance will become relatively poor, influences product qualification rate and performance.
Chinese patent document No. CN 102120357B, published as 2013, 8 and 28, discloses a large-area ultrathin plastic part injection mold, which adopts an efficient exhaust block, and designs reasonable exhaust and air guide structures in a runner and all cavities, so as to ensure smooth exhaust of the mold during high-speed injection filling and avoid the bad phenomenon of air trapping.
However, the problem of air trapping caused by smooth exhaust of the ultrathin plastic part during injection molding is solved in the technical scheme, and when the ultrathin plastic part is applied to a product with a large wall thickness, the air trapping phenomenon caused by the tumbling of the melt just before the injection molding melt enters the cavity is avoided, and the air trapping phenomenon does not reach the time of exhausting, so that the ultrathin plastic part is difficult to be applied to the injection molding product with the large wall thickness.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome among the above-mentioned prior art the great injection moulding product's of wall thickness plastic melt takes place the problem of the gas phenomenon of trapping in the die cavity, provide a mold insert subassembly and mould for preventing the fuse-element of moulding plastics from trapping gas, can avoid the plastic melt to take place the gas phenomenon of trapping in the die cavity.
In order to solve the technical problem, the utility model discloses a technical scheme is: an insert assembly for preventing air entrapment in an injection molding melt comprises a fixed seat, a movable insert with one end positioned in the fixed seat, and an elastic part connecting the movable insert and the fixed seat; the elastic piece pushes the movable insert to slide along the fixed seat; the fixed seat is used for being installed in a lower die of a die, and the elastic piece is used for pushing the movable insert to a feeding port of the upper die of the stopper.
In the above technical solution, the elastic member on the fixed seat pushes the movable insert to block the feeding port of the upper mold in a normal state, where the block may have a gap with the feeding port or may have no gap with the feeding port. When plastic melt enters from the feeding port, the pressure generated by the plastic melt is greater than the elastic force of the elastic part, so that the movable insert compresses the elastic part, the elastic part moves in the direction opposite to the feeding port, the distance between the movable insert and the feeding port is increased, and the plastic melt can be uniformly dispersed towards the cavity wall of the upper die cavity of the die under the reaction force of the movable insert, so that the die can perform normal injection molding, the product can be formed normally, and the problem that the plastic melt is difficult to roll when just entering the cavity when the product with large wall thickness performs injection molding is solved.
Preferably, the movable insert is provided with a containing cavity, and the elastic part is located in the containing cavity. The elastic part can be accommodated in the movable insert in a compressed state, so that the space occupied by the elastic part is reduced, the integral volume of the insert assembly is reduced, and the insert assembly is more favorably arranged in a mold.
Preferably, the bottom of the fixed seat is provided with a limit cavity; one end of the elastic piece is located in the limiting cavity, and the other end of the elastic piece is located in the accommodating cavity. One end of the elastic part is located the containing cavity, so that the moving space of the elastic part is limited, and the elastic part is prevented from moving relative to the fixed seat when stretching out and drawing back, so that the movable insert cannot move smoothly.
Preferably, the elastic member is a spring.
Preferably, one end of the spring is fixedly connected with the tail end of the accommodating cavity, and the other end of the spring is fixedly connected with the tail end of the limiting cavity. The two ends of the spring can be respectively connected with the containing cavity and the limiting cavity in a bonding mode and the like, the two ends of the spring are fixed, the spring is prevented from moving relative to the containing cavity and the limiting cavity, and the elastic force of the spring is almost used for pushing the movable insert.
Preferably, the central line of the spring and the central line of the movable insert are in the same straight line, and the elastic force of the spring can act on the center of the movable insert, so that the movable insert is stressed more uniformly and moves more smoothly.
Preferably, the movable insert and the fixed seat are in clearance fit, the fixed seat cannot cause movement obstruction to the movable insert, and the movable insert moves more smoothly.
The mold comprises an upper mold and a lower mold, wherein the upper mold is provided with a feeding hole, a cavity is formed between the upper mold and the lower mold, the lower mold is provided with the insert assembly, the fixing seat is installed in the lower mold, the lower mold is provided with a cavity part for fixing the fixing seat, the cavity part is provided with a sliding channel, and the tail end of the movable insert is flush with the tail end of the sliding channel; the elastic piece pushes the movable insert to block the feeding port.
In the technical scheme, the cavity part is also a part of the forming cavity, when no plastic melt flows into the mold, the elastic part pushes the movable insert to linearly slide along the fixed seat and the sliding channel, then the feeding port of the upper mold is blocked, and when the plastic melt enters from the feeding port, the pressure generated by the plastic melt is greater than the elastic force of the elastic part, so that the movable insert compresses the elastic part and moves in the opposite direction of the feeding port until the movable insert slowly moves to a position flush with the cavity part. The distance between the movable insert and the feeding port is increased, and the plastic melt can be uniformly dispersed towards the cavity wall of the mold cavity on the mold due to the reaction force of the movable insert, so that the mold can be used for normally injecting the plastic melt, the product can be normally formed, and the problem that the product with larger wall thickness rolls and is trapped in air when the plastic melt just enters the mold cavity is solved.
Preferably, the movable insert is of an inverted T shape, and the diameter of the sliding channel is smaller than the maximum diameter of the movable insert, so that the movable insert is prevented from being separated from the cavity part, and the movable insert is prevented from being limited.
Preferably, the fixing seat is connected with the cavity part through a fastening piece.
Compared with the prior art, the beneficial effects of the utility model are that: when the product with larger wall thickness is produced by injection molding, the plastic melt can be uniformly dispersed towards the cavity wall of the mold cavity on the mold due to the reaction force of the movable insert, so that the mold can be normally injected, the product can be normally formed, and the qualification rate and the performance of the product are ensured.
Drawings
Fig. 1 is a schematic structural diagram of an insert assembly for preventing air entrapment in an injection molding melt according to the present invention;
fig. 2 is a schematic structural diagram of a mold for preventing gas entrapment in an injection molding melt according to the present invention;
fig. 3 is an enlarged view of a position a of fig. 2.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limiting the present patent, and those skilled in the art will understand the specific meaning of the terms according to their specific circumstances.
The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:
example 1
Fig. 1 shows an embodiment of an insert assembly for preventing air entrapment in an injection-molded melt, which includes a holder 1, a removable insert 2 having one end located in the holder 1, and a resilient member 3 connecting the removable insert 2 and the holder 1; the elastic part 3 pushes the movable insert 2 to slide along the fixed seat 1; the fixed seat 1 is used for being installed in a lower die 5 of a die, and the elastic piece 3 is used for pushing the movable insert 2 to a feeding port of a blocking upper die 4.
Wherein, the movable insert 2 is provided with an accommodating cavity 201, and the bottom of the fixed seat 1 is provided with a limiting cavity 101. The elastic member 3 is located in the accommodation chamber 201. The elastic part 3 can be accommodated in the movable insert 2 in a compressed state, so that the space occupied by the elastic part 3 is reduced, the overall size of the insert assembly is reduced, and the insert assembly is more favorably arranged in a mold. One end of the elastic element 3 is located in the limiting cavity 101, and the other end is located in the accommodating cavity 201. One end of the elastic part 3 is located in the accommodating cavity 201, the movable space of the elastic part 3 is limited, and the elastic part 3 is prevented from moving relative to the fixing base 1 in a telescopic mode, so that the movable insert 2 cannot move smoothly.
In this embodiment, the elastic member 3 is a spring.
Specifically, one end of the spring is fixedly connected with the tail end of the accommodating cavity 201, and the other end of the spring is fixedly connected with the tail end of the limiting cavity 101. The two ends of the spring can be respectively connected with the containing cavity 201 and the limiting cavity 101 in a bonding mode, the two ends of the spring are fixed, the spring is prevented from moving relative to the containing cavity 201 and the limiting cavity, and the elastic force of the spring is almost used for pushing the movable insert 2.
The central line of the spring and the central line of the movable insert 2 are in the same straight line, and the elastic force of the spring can act on the center of the movable insert 2, so that the movable insert 2 is stressed more uniformly and moves more smoothly.
In addition, the movable insert 2 and the fixed seat 1 are in clearance fit, the fixed seat 1 cannot cause movement obstruction to the movable insert 2, and the movement of the movable insert 2 is smoother.
The working principle of the implementation is as follows: the elastic part 3 on the fixed seat 1 pushes the movable insert 2 to block the feeding port of the upper die in a normal state, and a gap can be left between the blocking part and the feeding port or between the blocking part and the feeding port. When a plastic melt enters from the feeding port, because the pressure generated by the plastic melt is greater than the elastic force of the elastic part 3, the movable insert 2 compresses the elastic part 3, the plastic melt moves in the direction opposite to the feeding port, the distance between the movable insert 2 and the feeding port is increased, and the plastic melt can be uniformly dispersed towards the cavity wall of the upper mold cavity of the mold under the reaction force of the movable insert 2, so that the mold can perform normal injection molding, the product can be formed normally, and the problem of air trapping caused by the tumbling of the plastic melt just entering the cavity when the plastic melt is injected into the product with large wall thickness is solved.
The beneficial effects of this embodiment: when the product with larger wall thickness is produced by injection molding, the plastic melt can be uniformly dispersed towards the cavity wall of the cavity of the upper die due to the reaction force of the movable insert 2, so that the mold can be normally injected, the product can be normally formed, and the qualification rate and the performance of the product are ensured.
Example 2
As shown in fig. 2-3, an embodiment of a mold for preventing gas entrapment in an injection-molded melt includes an upper mold 4 and a lower mold 5, the upper mold 4 is provided with a material inlet 401, a cavity 6 is formed between the upper mold 4 and the lower mold 5, the lower mold 5 is provided with an insert assembly according to embodiment 1, a fixing seat 1 is installed in the lower mold 5, the lower mold 5 is provided with a cavity portion 7 for fixing the fixing seat 1, the cavity portion 7 is provided with a sliding channel 701, and the end of a movable insert 2 is flush with the end of the sliding channel 701; the elastic member 3 pushes the removable insert 2 to block the material inlet 401.
Specifically, the movable insert 2 is inverted T-shaped, and the diameter of the sliding channel 701 is smaller than the maximum diameter of the movable insert 2, so that the movable insert 2 is prevented from being separated from the cavity part 7, and the movable insert 2 is prevented from being limited.
In addition, the fixed seat 1 is connected with the cavity part 7 through a fastener 8.
The working principle of the embodiment is as follows: the cavity portion 7 is also a part of the molding cavity 6, when no plastic melt flows into the mold, the elastic member 3 pushes the movable insert 2 to slide linearly along the fixed base 1 and the sliding track 701, and then blocks the feeding port 401 of the upper mold 4, and when the plastic melt enters from the feeding port 401, the movable insert 2 compresses the elastic member 3 to move in the opposite direction of the feeding port 401 until slowly moving to a position flush with the cavity portion 7 due to the pressure generated by the plastic melt being greater than the elastic force of the elastic member 3. The distance between the movable insert 2 and the feeding port 401 is increased, and the plastic melt can be uniformly dispersed towards the cavity wall of the cavity 6 of the upper die 4 of the die due to the reaction force of the movable insert 2, so that the die can be used for normally injecting the plastic, the product can be normally formed, and the problem of air trapping caused by the fact that the product with large wall thickness rolls when the plastic melt just enters the cavity 6 is solved.
The beneficial effects of this embodiment: when the product with larger wall thickness is produced by injection molding, the plastic melt can be uniformly dispersed to the cavity wall of the cavity 6 of the upper die 4 due to the reaction force of the movable insert 2, so that the mold can be used for normal injection molding, the product can be normally formed, and the qualification rate and the performance of the product are ensured.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An insert assembly for preventing air entrapment in an injection molding melt, comprising a fixed base (1), a movable insert (2) having one end located in the fixed base (1), and an elastic member (3) connecting the movable insert (2) and the fixed base (1); the elastic piece (3) pushes the movable insert (2) to slide along the fixed seat (1); the fixed seat (1) is used for being installed in a lower die of a die, and the elastic piece (3) is used for pushing the movable insert (2) to block a feeding opening of an upper die of the die.
2. An insert assembly for preventing gas entrapment in an injection molded melt as claimed in claim 1, wherein the removable insert (2) is provided with a receiving cavity (201), the resilient member (3) being located within the receiving cavity (201).
3. An insert assembly for preventing air entrapment in an injection molded melt according to claim 2, wherein the bottom of the holder (1) is provided with a retaining cavity (101); one end of the elastic piece (3) is positioned in the limiting cavity (101), and the other end of the elastic piece is positioned in the accommodating cavity (201).
4. An insert assembly for preventing gas entrapment in an injection molded melt according to claim 3, wherein the resilient member (3) is a spring.
5. An insert assembly for preventing air entrapment in an injection molded melt as claimed in claim 4, wherein one end of the spring is fixedly connected to a distal end of the receiving cavity (201), and the other end of the spring is fixedly connected to a distal end of the retaining cavity (101).
6. An insert assembly for preventing air entrapment in an injection molded melt as claimed in claim 4, wherein the centerline of the spring is collinear with the centerline of the removable insert (2).
7. An insert assembly for preventing gas entrapment in an injection molded melt as claimed in claim 1, wherein the removable insert (2) is a clearance fit with the holder (1).
8. A mold for preventing air entrapment in an injection molding melt, comprising an upper mold (4) and a lower mold (5), wherein the upper mold (4) is provided with a feeding port (401), and a cavity (6) is formed between the upper mold (4) and the lower mold (5), characterized in that the lower mold (5) is provided with the insert assembly according to any one of claims 1 to 7, the fixing seat (1) is installed in the lower mold (5), the lower mold (5) is provided with a cavity portion (7) for fixing the fixing seat (1), the cavity portion (7) is provided with a sliding channel (701), and the end of the movable insert (2) is flush with the end of the sliding channel (701); the elastic piece (3) pushes the movable insert (2) to block the feeding port (401).
9. A mold for preventing gas entrapment in an injection mold melt as claimed in claim 8, wherein the removable insert (2) is inverted T-shaped, and the diameter of the slide track (701) is smaller than the largest diameter of the removable insert (2).
10. A mould for preventing entrapment of an injection moulded melt as claimed in claim 8, characterised in that the holder (1) is connected to the cavity part (7) by a fastener (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120706881.4U CN215203190U (en) | 2021-04-07 | 2021-04-07 | Insert assembly for preventing gas trapping of injection molding melt and mold thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120706881.4U CN215203190U (en) | 2021-04-07 | 2021-04-07 | Insert assembly for preventing gas trapping of injection molding melt and mold thereof |
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| Publication Number | Publication Date |
|---|---|
| CN215203190U true CN215203190U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120706881.4U Active CN215203190U (en) | 2021-04-07 | 2021-04-07 | Insert assembly for preventing gas trapping of injection molding melt and mold thereof |
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| Country | Link |
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| CN (1) | CN215203190U (en) |
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2021
- 2021-04-07 CN CN202120706881.4U patent/CN215203190U/en active Active
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