CN111152424A - Injection mold with local delayed ejection - Google Patents
Injection mold with local delayed ejection Download PDFInfo
- Publication number
- CN111152424A CN111152424A CN202010086348.2A CN202010086348A CN111152424A CN 111152424 A CN111152424 A CN 111152424A CN 202010086348 A CN202010086348 A CN 202010086348A CN 111152424 A CN111152424 A CN 111152424A
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- China
- Prior art keywords
- ejector rod
- straight ejector
- straight
- inner cavity
- block
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
Abstract
The invention provides an injection mold capable of realizing local delay ejection, which is used for solving the problem that an ejecting block mark is generated when a mold is formed in the prior art. The invention provides an injection mold capable of realizing local delayed ejection, which comprises: the device comprises a movable mould, a fixed mould, a first straight ejector rod and a first straight ejector block; a forming inner cavity is formed between the movable mold and the fixed mold, the movable mold comprises a drive plate, the first straight ejector rod is arranged in the movable mold, and the drive plate can push the first straight ejector rod in the mold closing direction; the first straight ejector block is arranged at one end, close to the forming inner cavity, of the first straight ejector rod; the end, far away from the forming inner cavity, of the first straight ejector rod is provided with a first elastic part, the first elastic part is installed at the end, far away from the forming inner cavity, of the first straight ejector rod, the first elastic part is used for tensioning the first straight ejector rod in the side direction of the movable die, and in the initial state of the driving plate, a first initial interval is arranged between the first straight ejector rod and the driving plate. The generation of the top block print can be avoided.
Description
Technical Field
The invention relates to the field of injection molds, in particular to an injection mold with local delayed ejection.
Background
At present, people are more and more high to car quality requirement, especially car interior spare, like defrosting panel, door plant decoration, back of the body door decorative board, well accuse case curb plate etc. before the instrument panel, these part backs are all strengthened by a lot of muscle, very easily produce the local region of product appearance and have serious kicking block seal phenomenon, even also can't hide after the dermatoglyph is done to product appearance.
Generally, in the injection molding process of these parts, when a local area of the product appearance has a serious top block print, whether the top block and the movable mold are matched and flat or not is checked, and when the problem still cannot be solved, the problem still cannot be completely solved by adjusting process parameters, such as prolonging the product cooling time and slowing down the ejection speed, and the like, and the method has serious disadvantages as follows:
1. the product percent of pass is extremely low, and the scrappage is large;
2. the debugging time in the production process is long, and the production is seriously unstable;
3. the production period is prolonged, and the production cost is high;
4. narrow technological parameter range and difficult adaptation to continuous production.
Based on the above problems, it is necessary to find a mold implementation solution that completely solves the problem, thereby fundamentally solving the technical problem.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides an injection mold with a local delay ejection function, which is used to solve the problem of the occurrence of the block mark during the molding of the mold in the prior art.
To achieve the above and other related objects, the present invention provides a local delay ejection injection mold, comprising: the device comprises a movable mould, a fixed mould, a first straight ejector rod and a first straight ejector block;
a forming inner cavity is formed between the movable mold and the fixed mold, the movable mold comprises a drive plate, the first straight ejector rod is arranged in the movable mold, and the drive plate can push all the ejector rods in the mold closing direction;
the first straight ejector block is arranged at one end, close to the forming inner cavity, of the first straight ejector rod;
the end, far away from the forming inner cavity, of the first straight ejector rod is provided with a first elastic part, the first elastic part is installed at the end, far away from the forming inner cavity, of the first straight ejector rod, the first elastic part is used for tensioning the first straight ejector rod in the die assembly direction, and when the driving plate is in an initial state, a first initial interval is arranged between the first straight ejector rod and the driving plate.
Optionally, the molding thickness of the first straight top block is smaller than the molding thickness of the first straight top block towards one or more positions of the edge side.
Optionally, the molding thickness of the first straight top block is smaller than the molding thickness of the first straight top block towards each position of the edge side.
Optionally, the circumferential side of the first straight ejecting block is provided with a reinforcing rib forming cavity.
Optionally, the first straight-top block ring is provided with a dog house forming cavity towards the side.
Optionally, in an initial state of the driving plate, the first initial interval and the first elastic member have equal current deformation amount.
Optionally, the driving plate includes an upper top plate and a lower top plate, and the first top bar movably penetrates through the upper top plate;
the first elastic piece is matched with the first straight ejector rod through a bolt, the bolt axially and movably penetrates through the lower top plate and is fixed with one end, far away from the forming inner cavity, of the first straight ejector rod through a thread structure, and the first elastic piece is clamped between a nut of the bolt and the lower top plate.
Optionally, a stepped hole is formed in the surface, far away from the forming inner cavity, of the lower top plate, the bolt penetrates through a small hole of the stepped hole, and the first elastic piece is arranged in a large hole of the stepped hole.
Optionally, the injection mold for local delayed ejection further includes a second straight ejector rod and a second straight ejector block, the second straight ejector block is installed at one end, close to the forming inner cavity, of the second straight ejector rod, the second straight ejector rod and the second straight ejector rod are driven by the same drive plate, and in the initial state of the drive plate, one end, far away from the forming inner cavity, of the second straight ejector rod is in contact fit with the drive plate.
Optionally, the injection mold for local delayed ejection further includes a second straight ejector rod and a second straight ejector block, the second straight ejector block is installed at one end of the first straight ejector rod close to the molding inner cavity, the second straight ejector rod and the second straight ejector rod are driven by the same drive plate, in an initial state of the drive plate, one end of the second straight ejector rod, which is far away from the molding inner cavity, and the drive plate are provided with a second initial interval, the second initial interval is smaller than the first initial interval, and the second straight ejector rod is tensioned by a second elastic member in the direction of the movable mold side.
As described above, the injection mold with local delayed ejection of the invention has at least the following beneficial effects:
through the design of the first elastic piece, the first straight ejector rod can be in a tensioned state, the first straight ejector rod is tensioned, the first straight ejector rod and a first straight ejector block on the first straight ejector rod are prevented from moving forwards slightly due to the driving of the driving plate under the driving of the driving plate due to friction force in the sliding process, the first straight ejector rod can be in contact with the driving plate after being delayed relative to the forming of other parts in the driving process, the first straight ejector block can be ejected out and formed after being delayed, the area with obvious ejector block prints on the appearance of the local area of the product does not form vacuum any more, the area with rib positions on the periphery is loosened, the holding force is not too large, the ejector block prints of the product are not generated locally any more at the moment, the phenomenon that the serious ejector block prints exist in the local area of the appearance of the product is thoroughly solved, the good appearance of the product is ensured, the product qualification rate is, the production period is shortened, the cooling time is not prolonged, the cost is saved, and the production is stable. Thereby fundamentally solving the long-term puzzled difficult problem of producing the top block by injection molding.
Drawings
Fig. 1 is a schematic view of a local delayed ejection injection mold according to the present invention.
Fig. 2 is a schematic view showing the cooperation of the first tappet, the first elastic member and the driving plate according to the present invention.
Element number description: the device comprises a movable die 1, a fixed die 2, a first straight ejector rod 3, a first straight ejector block 4, a forming inner cavity 5, a drive plate 11, a first elastic piece 31, a first initial interval 32, an upper ejector plate 111, a lower ejector plate 112, a step hole 1121, a bolt 310, a second straight ejector rod 6 and a second straight ejector block 7.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1-2. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so as to be understood and read by those skilled in the art, and therefore, the present disclosure is not limited to the conditions of the present disclosure, and any modifications of the structures, the changes of the ratios, or the adjustments of the sizes, should fall within the scope of the present disclosure without affecting the functions and the achievable purposes of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
Referring to fig. 1 to 2, an embodiment of a local delayed ejection injection mold according to the present invention includes: the device comprises a movable die 1, a fixed die 2, a first straight ejector rod 3 and a first straight ejector block 4; a molding inner cavity 5 is formed between the movable mold 1 and the fixed mold 2, the movable mold 1 comprises a drive plate 11, the first straight ejector rod 3 is arranged in the movable mold 1, and the drive plate 11 can push the first straight ejector rod 3 in the mold closing direction; the first straight ejector block 4 is arranged at one end of the first straight ejector rod 3 close to the forming inner cavity 5; a first elastic part 31 is arranged at one end of the first straight ejector rod 3, which is far away from the molding inner cavity 5, the first elastic part 31 is used for tensioning the first straight ejector rod 3 in the movable mold side direction, and a first initial interval 32 is arranged between the first straight ejector rod 3 and the drive plate 11 in the initial state of the drive plate 11. Through the design of the first elastic piece 31, the first straight ejector rod 3 can be in a tensioned state, the first straight ejector rod 3 is tensioned, the first straight ejector rod 3 and the first straight ejector block 4 on the first straight ejector rod 3 are prevented from moving forwards slightly due to friction force in the sliding process of the drive plate 11, through the design of the initial interval, the drive plate 11 can be in contact with the drive plate 11 after the first straight ejector rod 3 is delayed relative to the forming of other parts in the driving process, the first straight ejector block 4 can be ejected and formed after the first straight ejector block 4 is delayed, the area with obvious ejector block prints in the local area appearance of the product is not formed in vacuum any more, the area with rib positions on the periphery is loosened, the holding force is not too large any more, at the moment, the ejector block prints of the product are not generated locally, so that the phenomenon that the serious ejector block prints exist in the local area of the product appearance is thoroughly solved, the good appearance of, the process parameter range is enlarged, the production period is shortened, the cooling time is not prolonged, the cost is saved, and the production is stable. Thereby fundamentally solving the long-term puzzled difficult problem of producing the top block by injection molding.
In this embodiment, the molding thickness of the first straight top block 4 is smaller than the molding thickness of the first straight top block 4 at a certain position or a plurality of positions on the circumferential side of the edge. Optionally, the circumferential side of the first straight ejecting block 4 is a reinforcing rib forming cavity. For example, only one side of the first straight top block 4 is provided with a reinforcing rib forming cavity. Optionally, the circumferential side of the first straight top block 4 is a dog house forming cavity. In addition to these two specific structures, other structures with a greater thickness are possible.
In this embodiment, the molding thickness of the first straight top block 4 is smaller than the molding thickness of each position of the circumferential edge of the first straight top block 4. Optionally, the circumferential side of the first straight ejecting block 4 is a reinforcing rib forming cavity. For example, the reinforcing ribs to be formed corresponding to the side of the first straight top block 4 are in an annular shape and surround the corresponding structure of the first straight top block 4. In addition to this particular configuration of the reinforcing bar, other configurations having a greater thickness are possible.
In this embodiment, in the initial state of the driving plate 11, the first initial interval 32 and the first elastic member 31 have the same amount of current deformation. When the first elastic member 31 is not compressed or extended, the driving plate 11 and the first push rod 3 just contact.
In this embodiment, referring to fig. 1 to 2, the driving plate 11 includes an upper top plate 111 and a lower top plate 112, and the first top rod 3 movably passes through the upper top plate 111; the first elastic member 31 is matched with the first ejector rod 3 through a bolt 310, the bolt 310 axially movably penetrates through the lower top plate 112 and is fixed with one end, far away from the forming inner cavity 5, of the first ejector rod 3 through a thread structure, and the first elastic member 31 is clamped between a nut of the bolt 310 and the lower top plate 112. Optionally, a stepped hole 1121 is formed in a surface of the lower top plate 112 away from the forming inner cavity 5, the bolt 310 passes through a small hole of the stepped hole 1121, and the first elastic member 31 is placed in a large hole of the stepped hole 1121. The first elastic part 31 can be a spring, in fig. 1 and fig. 2, the spring is compressed during initial state, the first straight ejector rod 3 is tensioned downwards, the influence of movement in the die assembly process on the forming precision is avoided, the first elastic part 31 is installed through the bolt 310, on one hand, disassembly and replacement are convenient, on the other hand, the pre-tightening degree of the first elastic part 31 is convenient to adjust, during die assembly, the lower top plate 112 is driven to move towards the fixed die side under the action of external power, the lower top plate 112 and the upper top plate 111 move towards the fixed die side together, and when the upper surface of the lower top plate 112 contacts with the first straight ejector rod 3, the first straight ejector rod 3 starts to move up and down under the action of force. Because the types of injection molds are many, what the present application wants to protect is this key action of delayed ejection, and other parts may adopt the existing mold structure, which can be clearly known by those skilled in the art and will not be described herein again. In actual use, the relative positional relationship between the movable mold 1 and the fixed mold 2 may be other than the vertical relationship shown in fig. 1 and 2, or may be a left-right relationship or another positional relationship when the movable mold and the fixed mold are installed obliquely.
In this embodiment, referring to fig. 1 to fig. 2, the injection mold for local delayed ejection further includes a second straight ejector rod 6 and a second straight ejector block 7, the second straight ejector block 7 is installed at one end of the second straight ejector rod 6 close to the molding inner cavity 5, the second straight ejector rod 6 and the first straight ejector rod 3 are driven by the same drive plate 11, and in an initial state of the drive plate 11, one end of the second straight ejector rod 6, which is far away from the molding inner cavity 5, is in contact fit with the drive plate 11. When the lower top plate 112 moves towards the fixed mold side, the second straight ejector rod 6 can respond in time, and the first straight ejector rod 3 responds in a delayed manner.
In this embodiment, the injection mold for local delayed ejection further includes a second straight ejector rod 6 and a second straight ejector block 7, the second straight ejector block 7 is installed at one end of the second straight ejector rod 6 close to the molding inner cavity 5, the second straight ejector rod 6 and the first straight ejector rod 3 are driven by the same drive board 11, when the drive board 11 is in the initial state, a second initial interval 0 is provided between one end of the second straight ejector rod 6 far away from the molding inner cavity 5 and the drive board 11, the second initial interval 0 is smaller than the first initial interval 32, the second straight ejector rod is tensioned by a second elastic member in the moving mold side direction, and the second elastic member may be similar to the first elastic member in installation structure and is not repeated here. When the lower top plate 112 moves towards the fixed mold side, the distance between the lower end of the second straight ejector rod 6 and the upper end surface of the lower top plate 112 is shorter and shorter, when the upper surface of the lower top plate 112 contacts with the lower end of the second straight ejector rod 6, the second straight ejector rod 6 is driven by the drive plate 11 towards the fixed mold side, the lower top plate 112 continues to move towards the fixed mold side, when the lower end of the first straight ejector rod 3 contacts with the upper surface of the lower top plate 112, the first straight ejector rod 3, the second straight ejector rod 6 and the lower top plate 112 synchronously move towards the fixed mold side, and time delay response of the first straight ejector rod 3 relative to the second straight ejector rod 6 is realized.
In conclusion, in the invention, due to the existence of the first elastic piece 31, in the driving process of the driving plate 11, compared with the forming of other parts, the first straight ejector rod 3 can be in delayed contact with the driving plate 11, the first straight ejector block 4 can be in delayed ejection forming, the region with obvious ejector block prints in the appearance of the local region of the product does not form vacuum any more, the region with rib positions around the region is loosened, the holding force is not too large, and the ejector block prints are not generated in the ejection of the product locally, so that the phenomenon that the local region of the product appearance has serious ejector block prints is thoroughly solved, the good appearance of the product is ensured, the product qualification rate is greatly improved, the process parameter range is expanded, the production period is shortened, the cooling time is not prolonged any more, the cost is saved, and the production is stable. Thereby fundamentally solving the long-term puzzled difficult problem of producing the top block by injection molding. Therefore, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides an ejecting injection mold of local time delay which characterized in that includes: the device comprises a movable mould, a fixed mould, a first straight ejector rod and a first straight ejector block;
a forming inner cavity is formed between the movable mold and the fixed mold, the movable mold comprises a drive plate, the first straight ejector rod is arranged in the movable mold, and the drive plate can push the first straight ejector rod in the mold closing direction;
the first straight ejector block is arranged at one end, close to the forming inner cavity, of the first straight ejector rod;
the end, far away from the forming inner cavity, of the first straight ejector rod is provided with a first elastic part, the first elastic part is installed at the end, far away from the forming inner cavity, of the first straight ejector rod, the first elastic part is used for tensioning the first straight ejector rod in the side direction of the movable die, and in the initial state of the driving plate, a first initial interval is arranged between the first straight ejector rod and the driving plate.
2. The local delay ejection injection mold of claim 1, wherein: the forming thickness of the first straight-ejecting block is smaller than the forming thickness of the first straight-ejecting block towards a certain position or a plurality of positions of the side.
3. The local delay ejection injection mold of claim 1, wherein: the forming thickness of the first straight ejecting block is smaller than the forming thickness of the first straight ejecting block towards each position of the side.
4. The local delay ejection injection mold according to claim 2 or 3, wherein: the first straight jacking block is provided with a reinforcing rib forming cavity towards the lateral side.
5. The local delay ejection injection mold according to claim 2 or 3, wherein: and the first straight ejecting block is provided with a doghouse forming cavity towards the lateral side.
6. The local delay ejection injection mold of claim 1, wherein: in an initial state of the driving plate, the first initial interval and the first elastic member are equal in current deformation amount.
7. The local delay ejection injection mold of claim 1, wherein: the driving plate comprises an upper top plate and a lower top plate, and the first straight ejector rod movably penetrates through the upper top plate;
the first elastic piece is matched with the first straight ejector rod through a bolt, the bolt axially and movably penetrates through the lower top plate and is fixed with one end, far away from the forming inner cavity, of the first straight ejector rod through a thread structure, and the first elastic piece is clamped between a nut of the bolt and the lower top plate.
8. The local delay ejection injection mold of claim 7, wherein: the surface of the lower top plate, which is far away from the forming inner cavity, is provided with a step hole, the bolt penetrates through a small hole of the step hole, and the first elastic piece is arranged in a large hole of the step hole.
9. The local delay ejection injection mold of claim 1, wherein: the injection mold capable of achieving local delay ejection further comprises a second straight ejector rod and a second straight ejector block, the second straight ejector block is installed at one end, close to the forming inner cavity, of the second straight ejector rod, the second straight ejector rod and the second straight ejector rod are driven by the same driving plate, and in the initial state of the driving plate, one end, far away from the forming inner cavity, of the second straight ejector rod is in contact fit with the driving plate.
10. The local delay ejection injection mold of claim 1, wherein: the injection mold for local delay ejection further comprises a second straight ejector rod and a second straight ejector block, the second straight ejector block is installed at one end, close to the forming inner cavity, of the first straight ejector rod, the second straight ejector rod and the second straight ejector rod are driven by the same driving plate, in the initial state of the driving plate, one end, far away from the forming inner cavity, of the second straight ejector rod and the driving plate are provided with a second initial interval, the second initial interval is smaller than the first initial interval, and the second straight ejector rod is tensioned by a second elastic piece in the side direction of the movable mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010086348.2A CN111152424A (en) | 2020-02-11 | 2020-02-11 | Injection mold with local delayed ejection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010086348.2A CN111152424A (en) | 2020-02-11 | 2020-02-11 | Injection mold with local delayed ejection |
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| Publication Number | Publication Date |
|---|---|
| CN111152424A true CN111152424A (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010086348.2A Pending CN111152424A (en) | 2020-02-11 | 2020-02-11 | Injection mold with local delayed ejection |
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| CN (1) | CN111152424A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112571720A (en) * | 2020-11-26 | 2021-03-30 | 神通科技集团股份有限公司 | Injection mold and injection method for motor framework insert |
-
2020
- 2020-02-11 CN CN202010086348.2A patent/CN111152424A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112571720A (en) * | 2020-11-26 | 2021-03-30 | 神通科技集团股份有限公司 | Injection mold and injection method for motor framework insert |
| CN112571720B (en) * | 2020-11-26 | 2023-05-12 | 神通科技集团股份有限公司 | Motor framework insert injection mold and injection molding method |
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