CN211640842U - Nitrogen spring reset mechanism for die - Google Patents
Nitrogen spring reset mechanism for die Download PDFInfo
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- CN211640842U CN211640842U CN201922128998.4U CN201922128998U CN211640842U CN 211640842 U CN211640842 U CN 211640842U CN 201922128998 U CN201922128998 U CN 201922128998U CN 211640842 U CN211640842 U CN 211640842U
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- bottom plate
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- nitrogen spring
- piston rod
- protective cover
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Abstract
The utility model provides a nitrogen spring reset mechanism for a mould, which comprises a limiting plate, a nitrogen spring, an ejector plate, an ejector bottom plate and a bottom plate; the nitrogen spring comprises a piston rod, a cylinder body, a fixing seat and a protective cover. The utility model has the advantages that the fixing seat is arranged on the nitrogen spring, and the nitrogen spring and the fixing seat are arranged on the bottom plate, so that the offset load of the nitrogen spring caused by the unevenness of the ejection bottom plate and the ejection plate can be effectively avoided, and the resetting mechanism of the mould is more reliable; the nitrogen spring also penetrates through the ejection bottom plate and the ejection plate, and the stability of the nitrogen spring is enhanced by wrapping the nitrogen spring by the ejection bottom plate and the ejection plate; through setting up the safety cover for the nitrogen gas spring, can make the piston rod keep clean and safety, avoid influencing nitrogen gas spring's performance.
Description
Technical Field
The utility model relates to an injection moulding technology field especially relates to a nitrogen spring canceling release mechanical system for mould.
Background
The injection molding process is a process for manufacturing a product with a certain shape by pressurizing, injecting, cooling, separating and the like molten raw materials. The injection molding process mainly comprises the stages of mold closing, filling, pressure maintaining, cooling, mold opening, demolding and the like, wherein a demolding mechanism in the injection mold is used for realizing the demolding stage of the injection molding process. The demoulding mechanism of the injection mould comprises an ejection mechanism and a reset mechanism, wherein a common part in the reset mechanism is a spring, and in order to enable the reset mechanism to have higher elastic pressure and longer service life, the spring can be replaced by a nitrogen spring.
The nitrogen spring is an elastic functional component, and seals high-pressure nitrogen in the cylinder body, and the nitrogen is compressed by external force through the piston rod, and when the external force is removed, a certain elastic pressure is obtained by means of expansion of the high-pressure nitrogen. When the nitrogen spring is used, attention needs to be paid to the fact that the nitrogen spring cannot be subjected to unbalance loading, the contact surface of the top end of the piston rod needs to be completely vertical to the direction of a compression stroke, and lateral force is avoided, otherwise, pressure loss of the nitrogen spring or overheating of a nitrogen cylinder body can be caused; the nitrogen spring is firmly fixed, and the phenomenon of shaking or moving is not allowed in the using process; the nitrogen spring is also used with care to keep the cylindrical surface of the piston rod clean, which could affect the performance of the nitrogen spring.
The nitrogen spring is usually fixed in the die by flange installation and screw hole installation and is generally installed on the ejector plate, but the phenomenon of biased loading or instability of the nitrogen spring still exists in the fixing mode; and the surface of the piston rod cannot be ensured to be clean, so that the performance of the nitrogen spring is easily influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a nitrogen spring reset mechanism for a mould.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a nitrogen spring reset mechanism for a die comprises a limiting plate, a nitrogen spring, an ejector plate, an ejector bottom plate and a bottom plate; the ejection bottom plate is arranged above the bottom plate; the ejection plate is arranged on the ejection bottom plate; the nitrogen spring comprises a piston rod, a cylinder body, a fixed seat and a protective cover, the fixed seat is fixedly arranged on the bottom plate, the bottom surface of the fixed seat is superposed on the bottom surface of the bottom plate, the upper end surface of the fixed seat is higher than the upper end surface of the bottom plate in the direction perpendicular to the bottom plate, the fixed seat is provided with a groove, the bottom surface of the groove is lower than the upper end surface of the bottom plate in the direction perpendicular to the bottom plate, and the diameter of the groove is the same as that of the cylinder body; the cylinder body is arranged in the groove and penetrates out of the ejection bottom plate and the ejection plate upwards; the bottom of the cylinder body is provided with a first screw hole, the fixed seat is provided with a second screw hole corresponding to the first screw hole, and the cylinder body and the fixed seat are connected through the first screw hole and the second screw hole by screws; the piston rod is arranged in the cylinder body, and the upper end face of the piston rod is higher than that of the cylinder body in the direction perpendicular to the bottom plate; the piston rod is provided with a ring disc, the diameter of the ring disc is larger than that of the piston rod, one end of the ring disc, facing the piston rod, is open, and the upper end face of the piston rod is in contact with the upper end face of the ring disc; the piston rod is provided with a protective cover, the protective cover is of an inverted barrel-shaped structure, the diameter of the protective cover is larger than that of the cylinder body, and the axial length of the protective cover is smaller than that of the piston rod; the ring disc is fixedly arranged in the protective cover, and the upper end face of the ring disc is in contact with the upper end face of the protective cover; the top of the piston rod is provided with a third screw hole, and the protective cover is in screw connection with the piston rod through the third screw hole; the protective cover is arranged in the limiting plate, and the bottom edge of the protective cover is in contact with the bottom of the limiting plate.
Furthermore, the number of the nitrogen springs is two, and the two nitrogen springs are respectively arranged at two ends of the bottom plate.
Further, the two nitrogen springs are symmetrically distributed around the central axis of the bottom plate.
Further, the axis of cylinder body with the axis coincidence of fixing base.
Further, the axis of the piston rod coincides with the axis of the ring plate, and the axis of the piston rod coincides with the axis of the protective cover.
Furthermore, there are two first screw holes and two second screw holes respectively.
Further, two first screw holes are symmetrically distributed around the central axis of the cylinder body.
Furthermore, the screw corresponding to the third screw hole is an inner hexagonal countersunk head screw.
Furthermore, a small guide pillar is arranged on the ejection bottom plate and penetrates through the ejection plate upwards; the small guide pillar is arranged beside the cylinder body.
Furthermore, a plurality of thimble holes are formed in the ejection plate; and the limiting plate is provided with a plurality of thimble guide holes corresponding to the thimble holes.
Compared with the prior art, the beneficial effects of the utility model are that: by arranging the fixed seat for the nitrogen spring and arranging the nitrogen spring and the fixed seat on the bottom plate, the offset load of the nitrogen spring caused by the unevenness of the ejection bottom plate and the ejection plate can be effectively avoided, and the resetting mechanism of the die is more reliable; the nitrogen spring also penetrates through the ejection bottom plate and the ejection plate, and the stability of the nitrogen spring is enhanced by wrapping the nitrogen spring by the ejection bottom plate and the ejection plate; through setting up the safety cover for the nitrogen gas spring, can make the piston rod keep clean and safety, avoid influencing nitrogen gas spring's performance.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a nitrogen spring according to an embodiment of the present invention;
wherein, the limit plate 1, the nitrogen spring 2, the ejector plate 3, the ejector bottom plate 4 and the bottom plate 5,
the piston rod 21, the cylinder body 22, the fixed seat 23, the ring disc 24, the protective cover 25, the groove 231, the first screw hole 221, the second screw hole 232, the third screw hole 211, the small guide post 41, the thimble hole 32 and the thimble guide hole 12.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1 and fig. 2 in combination, the utility model provides a nitrogen spring reset mechanism for a mold, which comprises a limiting plate 1, a nitrogen spring 2, an ejector plate 3, an ejector base plate 4 and a base plate 5; the ejection bottom plate 4 is arranged above the bottom plate 5; the ejector plate 3 is arranged above the ejector bottom plate 4; the nitrogen spring 2 comprises a piston rod 21, a cylinder body 22, a fixed seat 23 and a protective cover 25, wherein the fixed seat 23 is fixedly arranged on the bottom plate 5, the bottom surface of the fixed seat 23 is overlapped with the bottom surface of the bottom plate 5, the upper end surface of the fixed seat 23 is higher than the upper end surface of the bottom plate 5 in the direction vertical to the bottom plate 5, the fixed seat 23 is provided with a groove 231, the bottom surface of the groove 231 is lower than the upper end surface of the bottom plate 5 in the direction vertical to the bottom plate 5, and the diameter of the groove 231 is the same as that of the cylinder body; the cylinder body 22 is arranged in the groove 231, and the cylinder body 22 upwards penetrates through the ejector base plate 4 and the ejector plate 3; the bottom of the cylinder body 22 is provided with a first screw hole 221, the fixed seat 23 is provided with a second screw hole 232 corresponding to the first screw hole 221, and the cylinder body 22 and the fixed seat 23 are in screw connection through the first screw hole 221 and the second screw hole 232; the piston rod 21 is disposed in the cylinder 22, and an upper end surface of the piston rod 21 is higher than an upper end surface of the cylinder 22 in a direction perpendicular to the bottom plate 5; the piston rod 21 is provided with a ring disc 24, the diameter of the ring disc 24 is larger than that of the piston rod 21, one end of the ring disc 24, facing the piston rod 21, is open, and the upper end face of the piston rod 21 is in contact with the upper end face of the ring disc 24; the piston rod 21 is provided with a protective cover 25, the protective cover 25 is of an inverted barrel-shaped structure, the diameter of the protective cover 25 is larger than that of the cylinder body 22, and the axial length of the protective cover 25 is smaller than that of the piston rod 21; the ring disc 24 is fixedly arranged in the protective cover 25, and the upper end face of the ring disc 24 is contacted with the upper end face of the protective cover 25; the top of the piston rod 21 is provided with a third screw hole 211, and the protective cover 25 is in screw connection with the piston rod 21 through the third screw hole 211; the protective cover 25 is disposed in the position-limiting plate 1, and the bottom edge of the protective cover 25 contacts the bottom of the position-limiting plate 1. In the embodiment of the utility model, by arranging the fixing seat 23 for the nitrogen spring 2 and arranging the nitrogen spring 2 and the fixing seat 23 on the bottom plate 5, the unbalance loading of the nitrogen spring 2 caused by the unevenness of the ejection bottom plate 4 and the ejection plate 3 can be effectively avoided, so that the resetting mechanism of the die is more reliable; the nitrogen spring 2 also penetrates through the ejection bottom plate 4 and the ejection plate 3, and the stability of the nitrogen spring 2 is enhanced by wrapping the nitrogen spring 2 by the ejection bottom plate 4 and the ejection plate 3; by providing the nitrogen gas spring 2 with the protective cover 25, the piston rod 21 can be kept clean and safe, avoiding affecting the performance of the nitrogen gas spring 2.
The number of the nitrogen springs 2 is two, and the two nitrogen springs 2 are respectively arranged at two ends of the bottom plate 5. The two nitrogen springs 2 are symmetrically distributed about the central axis of the base plate 5. The embodiment of the utility model provides an in, the symmetry sets up two nitrogen gas springs 2 in the mould is in order to make entire system balanced, avoids nitrogen gas spring 2 to produce the yawing force and leads to the unbalance loading.
The central axis of the cylinder 22 coincides with the central axis of the fixing seat 23. The central axis of the piston rod 21 coincides with the central axis of the ring disc 24, and the central axis of the piston rod 21 coincides with the central axis of the protective cover 25. This setting can strengthen nitrogen spring 2's balance, avoids the unbalance loading, has also strengthened stability.
There are two first screw holes 221 and two second screw holes 232, respectively. The two first screw holes 221 are symmetrically distributed about the central axis of the cylinder 22. The nitrogen spring 2 is provided with two first screw holes 221, and then is in screw connection with the fixed seat 23, so that the nitrogen spring 2 is firmer and keeps stable.
The screw corresponding to the third screw hole 211 is an inner hexagonal countersunk head screw. The hexagon socket countersunk head screw is used for keeping the top of the piston rod 21 flat and avoiding unbalance loading.
The small guide post 41 is arranged on the ejecting bottom plate 4, and the small guide post 41 upwards penetrates through the ejecting plate 3; a small guide post 41 is provided beside the cylinder 22. The small guide post 41 is used for guiding the ejecting bottom plate 4 and the ejecting plate 3, so that the ejecting plate 3 is prevented from deviating from the ejecting bottom plate 4 during resetting.
The ejector plate 3 is provided with a plurality of ejector pin holes 32; the stopper plate 1 is provided with a plurality of thimble guide holes 12 corresponding to the plurality of thimble holes 32. Thimble hole 32 and thimble guide hole 12 are used to receive a thimble.
The utility model discloses working process: when a plastic part is demoulded, the push rod of the injection molding machine pushes the ejection bottom plate and the ejection plate to move upwards by pushing the bottom plate, the nitrogen spring is compressed, and the demoulding mechanism is used for demoulding the plastic part; the push rod of the injection molding machine retreats to return, the mold resets, high-pressure nitrogen in the nitrogen spring expands, and the nitrogen spring rebounds, so that the ejector plate, the ejector bottom plate and the bottom plate also retreat to return, and the resetting of the mold is completed.
The utility model has the advantages that the fixing seat is arranged on the nitrogen spring, and the nitrogen spring and the fixing seat are arranged on the bottom plate, so that the offset load of the nitrogen spring caused by the unevenness of the ejection bottom plate and the ejection plate can be effectively avoided, and the resetting mechanism of the mould is more reliable; the nitrogen spring also penetrates through the ejection bottom plate and the ejection plate, and the stability of the nitrogen spring is enhanced by wrapping the nitrogen spring by the ejection bottom plate and the ejection plate; through setting up the safety cover for the nitrogen gas spring, can make the piston rod keep clean and safety, avoid influencing nitrogen gas spring's performance.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (10)
1. A nitrogen spring reset mechanism for a die is characterized by comprising a limiting plate, a nitrogen spring, an ejector plate, an ejector bottom plate and a bottom plate;
the ejection bottom plate is arranged above the bottom plate; the ejection plate is arranged on the ejection bottom plate;
the nitrogen spring comprises a piston rod, a cylinder body, a fixed seat and a protective cover, the fixed seat is fixedly arranged on the bottom plate, the bottom surface of the fixed seat is superposed on the bottom surface of the bottom plate, the upper end surface of the fixed seat is higher than the upper end surface of the bottom plate in the direction perpendicular to the bottom plate, the fixed seat is provided with a groove, the bottom surface of the groove is lower than the upper end surface of the bottom plate in the direction perpendicular to the bottom plate, and the diameter of the groove is the same as that of the cylinder body; the cylinder body is arranged in the groove and penetrates out of the ejection bottom plate and the ejection plate upwards; the bottom of the cylinder body is provided with a first screw hole, the fixed seat is provided with a second screw hole corresponding to the first screw hole, and the cylinder body and the fixed seat are connected through the first screw hole and the second screw hole by screws; the piston rod is arranged in the cylinder body, and the upper end face of the piston rod is higher than that of the cylinder body in the direction perpendicular to the bottom plate; the piston rod is provided with a ring disc, the diameter of the ring disc is larger than that of the piston rod, one end of the ring disc, facing the piston rod, is open, and the upper end face of the piston rod is in contact with the upper end face of the ring disc; the piston rod is provided with a protective cover, the protective cover is of an inverted barrel-shaped structure, the diameter of the protective cover is larger than that of the cylinder body, and the axial length of the protective cover is smaller than that of the piston rod; the ring disc is fixedly arranged in the protective cover, and the upper end face of the ring disc is in contact with the upper end face of the protective cover; the top of the piston rod is provided with a third screw hole, and the protective cover is in screw connection with the piston rod through the third screw hole;
the protective cover is arranged in the limiting plate, and the bottom edge of the protective cover is in contact with the bottom of the limiting plate.
2. The nitrogen spring return mechanism for molds of claim 1, wherein there are two of said nitrogen springs, and two of said nitrogen springs are disposed at both ends of said bottom plate, respectively.
3. The nitrogen spring return mechanism for a mold of claim 2, wherein two of said nitrogen springs are symmetrically disposed about a central axis of said base plate.
4. The nitrogen spring return mechanism for a mold of claim 1, wherein the central axis of the cylinder coincides with the central axis of the holder.
5. The nitrogen spring return mechanism for a mold of claim 1, wherein the central axis of the piston rod coincides with the central axis of the ring plate, and the central axis of the piston rod coincides with the central axis of the protective cover.
6. The nitrogen spring return mechanism for a mold of claim 1, wherein there are two of said first threaded holes and two of said second threaded holes, respectively.
7. The nitrogen spring return mechanism for a mold according to claim 6, wherein two of said first screw holes are symmetrically arranged about a central axis of said cylinder.
8. The nitrogen spring return mechanism for dies of claim 1 wherein the screws corresponding to the third threaded holes are socket head cap screws.
9. The nitrogen spring return mechanism for molds of claim 1, wherein said ejector base plate is provided with small guide posts, and said small guide posts pass upwardly through said ejector plate; the small guide pillar is arranged beside the cylinder body.
10. The nitrogen spring return mechanism for a mold of claim 1 wherein said ejector plate is provided with a plurality of ejector pin holes; and the limiting plate is provided with a plurality of thimble guide holes corresponding to the thimble holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128998.4U CN211640842U (en) | 2019-12-03 | 2019-12-03 | Nitrogen spring reset mechanism for die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128998.4U CN211640842U (en) | 2019-12-03 | 2019-12-03 | Nitrogen spring reset mechanism for die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211640842U true CN211640842U (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922128998.4U Active CN211640842U (en) | 2019-12-03 | 2019-12-03 | Nitrogen spring reset mechanism for die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211640842U (en) |
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2019
- 2019-12-03 CN CN201922128998.4U patent/CN211640842U/en active Active
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