CN111300772A - Injection mold capable of achieving rapid forming - Google Patents
Injection mold capable of achieving rapid forming Download PDFInfo
- Publication number
- CN111300772A CN111300772A CN202010219947.7A CN202010219947A CN111300772A CN 111300772 A CN111300772 A CN 111300772A CN 202010219947 A CN202010219947 A CN 202010219947A CN 111300772 A CN111300772 A CN 111300772A
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- China
- Prior art keywords
- top plate
- cavity
- plate
- expansion cylinder
- injection mold
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7337—Heating or cooling of the mould using gas or steam
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a rapid-forming injection mold which comprises a base and a top plate, wherein a lower mold is fixed on the upper end surface of the base, a cavity is formed in the lower mold, a steam plate is laid on the inner wall of the cavity, and the top plate is arranged at the bottom of the cavity; the jacking assembly is arranged below the top plate and comprises an expansion cylinder and a connecting plate, the cooling pipe is provided with a heat exchange box and a circulating pump, and a steam pipe is communicated between the heat exchange box and the steam plate. The rapid-forming injection mold utilizes the heat absorption expansion of the cooling liquid as a power source to push a piston rod in an expansion cylinder to move, so that a top plate in a cavity is jacked up, and the rapid demolding of an injection product is realized; meanwhile, the heat exchange box is utilized to exchange heat for the cooling liquid and store the heat, and then the heat is conducted to the steam plate, so that the flowability of the raw material in the injection molding process is ensured, the defects of bubbles and the like are avoided, and the quality of injection molded products is improved; the cooling liquid and heat are recycled, the energy is saved, the environment is protected, the forming speed is high, and the production efficiency is high.
Description
Technical Field
The invention relates to the technical field of injection molds, in particular to a rapid-forming injection mold.
Background
An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a processing method used for mass production of parts with complex shapes, and particularly relates to a method for injecting heated and melted plastic into a mold cavity from an injection molding machine at high pressure, and obtaining a formed product after cooling and solidification.
The existing injection mold is cooled naturally, the molding speed of the module cannot be improved, the use is inconvenient, and most of the existing injection mold is separated through a motor or a hydraulic cylinder when an injection product is demolded, so that resources are wasted.
Disclosure of Invention
The present invention is directed to a rapid-forming injection mold, which solves the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a guide post is vertically supported between the base and the top plate, a hydraulic machine is fixed on the lower end face of the top plate, a telescopic post is arranged below the hydraulic machine, a lifting plate which is sleeved on the guide post in a sliding mode is fixed at the lower end of the telescopic post, an upper die is fixed on the lower end face of the lifting plate, a lower die is fixed on the upper end face of the base, a cavity is formed in the lower die, a steam plate is laid on the inner wall of the cavity, and the top plate is arranged at the bottom of the cavity; a cavity is further formed in the base, a jacking assembly for driving the top plate is arranged in the cavity, the jacking assembly comprises an expansion cylinder and a connecting plate, the expansion cylinder is fixedly arranged in the cavity, a piston rod is movably embedded in the upper end of the expansion cylinder, the top of the piston rod is fixedly provided with the connecting plate, a push rod is connected between the connecting plate and the top plate, and a through groove for accommodating the push rod is formed in the lower die; the two ends of the expansion cylinder are connected with cooling pipes which are led into the lower die, a heat exchange box is arranged on the cooling pipe at one end of the expansion cylinder, a steam pipe is communicated between the heat exchange box and the steam plate, and a circulating pump is arranged on the cooling pipe at the other end of the expansion cylinder; the guide post is provided with a lower in-place sensor and an upper in-place sensor for detecting the position of the upper die, and the upper end surface of the top plate is provided with a controller for receiving signals of the lower in-place sensor and the upper in-place sensor and controlling the operation of the circulating pump and the heat exchange box.
As a further scheme of the invention: and the cooling pipe in the lower die is coiled below the cavity in an S shape.
As a further scheme of the invention: the cooling liquid in the cooling pipe is glycol.
As a further scheme of the invention: the number of the ejector rods is three, and the ejector rods are symmetrically distributed at the bottom of the top plate.
As a further scheme of the invention: the number of the piston rods is two and the piston rods are symmetrically distributed on two sides of the upper end of the expansion cylinder.
As a further scheme of the invention: the upper end face of the top plate is also coated with a release agent.
As a further scheme of the invention: the release agent is prepared from low molecular weight polyethylene.
Compared with the prior art, the invention has the beneficial effects that:
the rapid-forming injection mold utilizes the heat absorption expansion of the cooling liquid as a power source to push a piston rod in an expansion cylinder to move, so that a top plate in a cavity is jacked up, and the rapid demolding of an injection product is realized; meanwhile, the heat exchange box is utilized to exchange heat for the cooling liquid and store the heat, and then the heat is conducted to the steam plate, so that the flowability of the raw material in the injection molding process is ensured, the defects of bubbles and the like are avoided, and the quality of injection molded products is improved; the cooling liquid and heat are recycled, the energy consumption is greatly reduced, the energy is saved, the environment is protected, the forming speed is high, and the production efficiency is high.
Drawings
FIG. 1 is a schematic structural view of a rapid prototyping injection mold;
FIG. 2 is a schematic view of a lower mold structure of a rapid prototyping injection mold;
fig. 3 is a perspective view of an expansion cylinder in a rapid prototyping injection mold.
In the figure: 1-base, 2-top plate, 3-guide column, 4-hydraulic press, 5-telescopic column, 6-lifting plate, 7-upper mould, 8-lower mould, 9-cavity, 10-steam plate, 11-top plate, 12-through groove, 13-ejector rod, 14-connecting plate, 15-expansion cylinder, 16-cooling pipe, 17-circulating pump, 18-heat exchange box, 19-piston rod, 20-steam pipe, 21-cavity, 22-lower in-place sensor, 23-upper in-place sensor and 24-controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if there is a directional indication (such as up, down, left, right, front, and back) in the embodiment of the present invention, it is only used to explain the relative position relationship between the components, the motion situation, and the like in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if the description of "first", "second", etc. is referred to in the present invention, it is used for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, a fast-forming injection mold comprises a base 1 and a top plate 2, a guide post 3 is vertically supported between the base 1 and the top plate 2, a hydraulic machine 4 is fixed on the lower end surface of the top plate 2, a telescopic post 5 is arranged below the hydraulic machine 4, a lifting plate 6 which is slidably sleeved on the guide post 3 is fixed at the lower end of the telescopic post 5, an upper mold 7 is fixed on the lower end surface of the lifting plate 6, a lower mold 8 is fixed on the upper end surface of the base 1, a cavity 9 is formed in the lower mold 8, a steam plate 10 is laid on the inner wall of the cavity 9, and a top plate 11 is arranged at the bottom of the cavity 9; a cavity 21 is further formed in the base 1, a jacking assembly for driving the top plate 11 is arranged in the cavity 21, the jacking assembly comprises an expansion cylinder 15 and a connecting plate 14, the expansion cylinder 15 is fixedly arranged in the cavity 21, a piston rod 19 is movably embedded at the upper end of the expansion cylinder 15, the connecting plate 14 is fixed at the top of the piston rod 19, a push rod 13 is connected between the connecting plate 14 and the top plate 11, and a through groove 12 for accommodating the push rod 13 is formed in the lower die 8; the two ends of the expansion cylinder 15 are connected with cooling pipes 16 which are led into the lower die 8, a heat exchange box 18 is arranged on the cooling pipe 16 at one end of the expansion cylinder 15, a steam pipe 20 is communicated between the heat exchange box 18 and the steam plate 10, and a circulating pump 17 is arranged on the cooling pipe 16 at the other end of the expansion cylinder 15; a lower in-place sensor 22 and an upper in-place sensor 23 for detecting the position of the upper die 7 are mounted on the guide post 3, and a controller 24 for receiving signals of the lower in-place sensor 22 and the upper in-place sensor 23 and controlling the operation of the circulating pump 17 and the heat exchange box 18 is mounted on the upper end surface of the top plate 2;
specifically, the hydraulic machine 4 drives the upper die 7 to move downwards until the upper die 7 is contacted with the lower die 8, the lower in-place sensor 22 detects that the upper die 7 moves downwards in place, molten injection molding raw materials are injected into the cavity 9, after the raw materials are solidified, the upper die 7 moves upwards until the upper in-place sensor 23 detects that the upper die 7 moves upwards in place, the circulating pump 17 is started to drive the cooling liquid in the cooling pipe 16 to circularly flow, the cooling liquid flows through the lower die 8, so that the heat in the lower die 8 is quickly absorbed, the cooling liquid is heated to expand, the volume in the expansion cylinder 15 is increased, the piston rod 19 is pushed to move upwards, the connecting plate 14 is pushed to move upwards, and the top plate 11 in the cavity 9 is slowly jacked under the transmission of the ejector rod 13, so that the injection molding product is quickly demolded; then, heat exchange is carried out between the heat exchange box 18 and the cooling pipe 16, heat of cooling liquid in the cooling pipe 16 is absorbed and stored, and then when a new round of injection molding is carried out, the stored heat is transferred to the steam plate 10 through the steam pipe 20 by the heat exchange box 18, so that the temperature of raw materials in the injection molding process is ensured, and the raw materials keep high fluidity, and therefore each area of the cavity 9 can be completely covered, the defects of dead corners, bubbles and the like are avoided, and the injection molding quality is improved;
in order to increase the heat exchange efficiency of the cooling liquid and improve the cooling effect on the lower die 8, the cooling pipe 16 in the lower die 8 is coiled below the cavity 9 in an S shape;
the type of the cooling liquid in the cooling pipe 16 is not particularly limited, in this embodiment, preferably, the cooling liquid in the cooling pipe 16 is ethylene glycol, which is not easily volatilized and has a large thermal expansion coefficient, so that the cooling liquid can be rapidly expanded after absorbing heat, and the piston rod 19 is pushed to jack the top plate 11, thereby facilitating demolding;
in order to ensure the balance and stability of the movement of the top plate 11, the number of the top rods 13 is three and is symmetrically distributed at the bottom of the top plate 11; the number of the piston rods 19 is two and the two piston rods are symmetrically distributed on two sides of the upper end of the expansion cylinder 15.
The working principle of the embodiment is as follows:
firstly, driving an upper die 7 to move downwards through a hydraulic machine 4 until the upper die 7 is contacted with a lower die 8, detecting that the upper die 7 moves downwards to the right position by a lower in-position sensor 22, beginning to inject molten injection molding raw materials into a cavity 9, after the raw materials are solidified, moving the upper die 7 upwards until an upper in-position sensor 23 detects that the upper die 7 moves upwards to the right position, starting a circulating pump 17, driving cooling liquid in a cooling pipe 16 to circularly flow, and flowing the cooling liquid through the lower die 8, so as to quickly absorb heat in the lower die 8, and the cooling liquid expands by heating, so that the volume in an expansion cylinder 15 is increased, a piston rod 19 is pushed upwards, so as to push a connecting plate 14 to move upwards, and a top plate 11 in the cavity 9 is slowly jacked under the transmission of a jacking rod 13, so as to realize; and then, heat exchange is carried out between the heat exchange box 18 and the cooling pipe 16, heat of cooling liquid in the cooling pipe 16 is absorbed and stored, and then, when a new round of injection molding is carried out, the stored heat is transferred to the steam plate 10 through the steam pipe 20 by the heat exchange box 18, so that the temperature of raw materials in the injection molding process is ensured, and the raw materials keep high fluidity, thereby completely covering each area of the cavity 9, avoiding the defects of dead corners, bubbles and the like and improving the injection molding quality.
Example 2
A fast-forming injection mold comprises a base 1 and a top plate 2, a guide post 3 is vertically supported between the base 1 and the top plate 2, a hydraulic machine 4 is fixed on the lower end face of the top plate 2, a telescopic post 5 is arranged below the hydraulic machine 4, a lifting plate 6 which is sleeved on the guide post 3 in a sliding mode is fixed at the lower end of the telescopic post 5, an upper mold 7 is fixed on the lower end face of the lifting plate 6, a lower mold 8 is fixed on the upper end face of the base 1, a cavity 9 is formed in the lower mold 8, a steam plate 10 is laid on the inner wall of the cavity 9, and a top plate 11 is arranged at the bottom of the cavity 9; a cavity 21 is further formed in the base 1, a jacking assembly for driving the top plate 11 is arranged in the cavity 21, the jacking assembly comprises an expansion cylinder 15 and a connecting plate 14, the expansion cylinder 15 is fixedly arranged in the cavity 21, a piston rod 19 is movably embedded at the upper end of the expansion cylinder 15, the connecting plate 14 is fixed at the top of the piston rod 19, a push rod 13 is connected between the connecting plate 14 and the top plate 11, and a through groove 12 for accommodating the push rod 13 is formed in the lower die 8; the two ends of the expansion cylinder 15 are connected with cooling pipes 16 which are led into the lower die 8, a heat exchange box 18 is arranged on the cooling pipe 16 at one end of the expansion cylinder 15, a steam pipe 20 is communicated between the heat exchange box 18 and the steam plate 10, and a circulating pump 17 is arranged on the cooling pipe 16 at the other end of the expansion cylinder 15; a lower in-place sensor 22 and an upper in-place sensor 23 for detecting the position of the upper die 7 are mounted on the guide post 3, and a controller 24 for receiving signals of the lower in-place sensor 22 and the upper in-place sensor 23 and controlling the operation of the circulating pump 17 and the heat exchange box 18 is mounted on the upper end surface of the top plate 2;
in order to further promote the rapid molding of the injection molded product, the upper end surface of the top plate 11 is also coated with a mold release agent, thereby facilitating rapid mold release;
the specific material of the release agent is not limited, and in this embodiment, preferably, the release agent is made of low molecular weight polyethylene, which is high temperature resistant, good in thermal stability, and high in release efficiency.
The injection mold for rapid molding utilizes the heat absorption expansion of the cooling liquid as a power source to push a piston rod 19 in an expansion cylinder 15 to move, so that a top plate 11 in a cavity 9 is jacked up, and the rapid demolding of an injection product is realized; meanwhile, the heat exchange box 18 is utilized to exchange heat with the cooling liquid and store the heat, and then the heat is conducted to the steam plate 10, so that the flowability of the raw materials in the injection molding process is ensured, the defects of bubbles and the like are avoided, and the quality of injection molded products is improved; the cooling liquid and heat are recycled, the energy consumption is greatly reduced, and the energy-saving and environment-friendly effects are achieved.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. A fast-forming injection mold comprises a base (1) and a top plate (2), a guide column (3) is vertically supported between the base (1) and the top plate (2), a hydraulic machine (4) is fixed on the lower end face of the top plate (2), a telescopic column (5) is arranged below the hydraulic machine (4), a lifting plate (6) which is sleeved on the guide column (3) in a sliding mode is fixed at the lower end of the telescopic column (5), an upper mold (7) is fixed on the lower end face of the lifting plate (6), a lower mold (8) is fixed on the upper end face of the base (1), a cavity (9) is formed in the lower mold (8), and the fast-forming injection mold is characterized in that a steam plate (10) is laid on the inner wall of the cavity (9), and a top plate (11) is arranged at the bottom of the cavity; a cavity (21) is further formed in the base (1), a jacking assembly for driving the top plate (11) is arranged in the cavity (21), the jacking assembly comprises an expansion cylinder (15) and a connecting plate (14), the expansion cylinder (15) is fixedly arranged in the cavity (21), a piston rod (19) is movably embedded at the upper end of the expansion cylinder (15), the connecting plate (14) is fixed at the top of the piston rod (19), a push rod (13) is connected between the connecting plate (14) and the top plate (11), and a through groove (12) for accommodating the push rod (13) is formed in the lower die (8); the two ends of the expansion cylinder (15) are connected with cooling pipes (16) which are led into the lower die (8), a heat exchange box (18) is arranged on the cooling pipe (16) at one end of the expansion cylinder (15), a steam pipe (20) is communicated between the heat exchange box (18) and the steam plate (10), and a circulating pump (17) is arranged on the cooling pipe (16) at the other end of the expansion cylinder (15); the guide post (3) is provided with a lower in-place sensor (22) and an upper in-place sensor (23) which are used for detecting the position of the upper die (7), and the upper end surface of the top plate (2) is provided with a controller (24) which is used for receiving signals of the lower in-place sensor (22) and the upper in-place sensor (23) and controlling the operation of the circulating pump (17) and the heat exchange box (18).
2. Rapid prototyping injection mold in accordance with claim 1, characterized in that the cooling pipe (16) in the lower mold (8) is coiled S-shaped below the cavity (9).
3. Rapid prototyping injection mold in accordance with claim 2, characterized in that the cooling liquid in the cooling pipe (16) is glycol.
4. The rapid prototyping injection mold of claim 1, wherein the number of ejector pins (13) is three and symmetrically distributed at the bottom of the top plate (11).
5. Rapid prototyping injection mold as in claim 4, wherein the number of said piston rods (19) is two and symmetrically distributed on both sides of the upper end of the expansion cylinder (15).
6. A rapid prototyping injection mold as in any of the claims 1-5, in which the upper end surface of the top plate (11) is further coated with a release agent.
7. The rapid prototyping injection mold of claim 6 wherein the mold release agent is made from low molecular weight polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219947.7A CN111300772A (en) | 2020-03-25 | 2020-03-25 | Injection mold capable of achieving rapid forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219947.7A CN111300772A (en) | 2020-03-25 | 2020-03-25 | Injection mold capable of achieving rapid forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111300772A true CN111300772A (en) | 2020-06-19 |
Family
ID=71156105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010219947.7A Withdrawn CN111300772A (en) | 2020-03-25 | 2020-03-25 | Injection mold capable of achieving rapid forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111300772A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112971319A (en) * | 2021-02-03 | 2021-06-18 | 杨莉萍 | Lipstick shaping acceleration die used in tubular lipstick processing process |
| CN113134955A (en) * | 2021-05-06 | 2021-07-20 | 莫颖乐 | Injection mold with condensation function |
| CN115710413A (en) * | 2023-01-09 | 2023-02-24 | 广东品凡派塑胶实业有限公司 | Chemical-resistant injection-molding-grade super-tough PET make-up package material and dynamic variable-mold-temperature injection molding method thereof |
| CN116714199A (en) * | 2023-08-04 | 2023-09-08 | 常州彤扬电气制造有限公司 | Feeding and discharging device for processing and conveying injection molding machine products |
-
2020
- 2020-03-25 CN CN202010219947.7A patent/CN111300772A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112971319A (en) * | 2021-02-03 | 2021-06-18 | 杨莉萍 | Lipstick shaping acceleration die used in tubular lipstick processing process |
| CN113134955A (en) * | 2021-05-06 | 2021-07-20 | 莫颖乐 | Injection mold with condensation function |
| CN113134955B (en) * | 2021-05-06 | 2022-09-20 | 广东启智精密科技有限公司 | Injection mold with condensation function |
| CN115710413A (en) * | 2023-01-09 | 2023-02-24 | 广东品凡派塑胶实业有限公司 | Chemical-resistant injection-molding-grade super-tough PET make-up package material and dynamic variable-mold-temperature injection molding method thereof |
| CN116714199A (en) * | 2023-08-04 | 2023-09-08 | 常州彤扬电气制造有限公司 | Feeding and discharging device for processing and conveying injection molding machine products |
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| PB01 | Publication | ||
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Application publication date: 20200619 |