CN113459414B - Injection mold for thermoplastic plastics - Google Patents
Injection mold for thermoplastic plastics Download PDFInfo
- Publication number
- CN113459414B CN113459414B CN202110746002.5A CN202110746002A CN113459414B CN 113459414 B CN113459414 B CN 113459414B CN 202110746002 A CN202110746002 A CN 202110746002A CN 113459414 B CN113459414 B CN 113459414B
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- fixedly connected
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- die holder
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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
- B29C45/26—Moulds
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to an injection mold for thermoplastic plastics, which comprises an upper mold base, a lower mold base and a base, wherein the upper mold base, the lower mold base and the base are used for forming an injection mold main body; the front end surfaces of the upper die base and the lower die base are provided with a die ejection mechanism for ejecting the formed part; the right part of the upper end surface of the base is provided with a pushing mechanism for pushing away the formed part; the ejection die mechanism comprises an ejection block for ejecting the formed part, a C-shaped frame, a sliding rod, barb strip blocks, a square frame, barb teeth and a sliding block; the pushing mechanism comprises a pushing block, a first rack, a second rack, a rotating shaft and a gear ring, wherein the pushing block is used for pushing the injection molding piece; the outer part of the rotating shaft is sleeved with a gear ring, and the gear ring is meshed with the first rack; the right end face of the upper die holder is fixedly connected with a second rack through a cross rod. The invention has the advantages that the injection molding part can be automatically ejected from the lower die holder after injection molding is finished, the condition of clamping the die is prevented, the demolding efficiency is improved, the injection molding part can be automatically pushed away, the time and the labor are saved, and the injection molding efficiency is improved.
Description
Technical Field
The invention relates to the technical field of injection molding equipment, in particular to an injection mold for thermoplastic plastics.
Background
Thermoplastic plastic is plastic with certain temperature and solidified after cooling, and has the characteristics of softening by heating and hardening by cooling. Most plastics used in our daily lives fall into this category. Softening and flowing when heating, cooling and hardening, wherein the process is reversible and can be repeatedly performed; injection molding is an important ring in the process of processing thermoplastic plastic products, loose granular or powdery raw materials are sent into a high-temperature charging barrel from an injection molding machine to be heated, melted and plasticized, so that the raw materials become viscous melt, the viscous melt is filled into a mold at a certain pressure and speed, and the mold is opened after pressure maintaining and cooling, so that the plastic products with certain shapes and sizes can be obtained.
However, the traditional injection mold at present needs to eject an injection molding part by using an air cylinder after injection molding is completed, however, sometimes the injection molding part is too tight with the mold, the situation of clamping easily occurs, and the demolding efficiency is reduced; and traditional injection mold needs manual taking off the injection molding piece from the mould, and production efficiency is low.
Disclosure of Invention
The present invention is directed to an injection mold for thermoplastic, which solves the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: an injection mold for thermoplastic plastics comprises an upper mold base, a lower mold base and a base, wherein the upper mold base, the lower mold base and the base are used for forming an injection mold main body; the left part of the upper end surface of the base is fixedly connected with a lower die holder through a fixing frame; the upper end surface of the lower die holder is fixedly connected with a guide pillar for connecting the upper die holder and the lower die holder; the guide post is connected with the upper die holder in a penetrating and sliding manner; the front end surfaces of the upper die base and the lower die base are provided with a die ejection mechanism for ejecting the formed part; the right part of the upper end surface of the base is provided with a pushing mechanism for pushing away the formed part;
the ejection die mechanism comprises an ejection block for ejecting the formed part, a C-shaped frame, a sliding rod, barb strip blocks, a square frame, barb teeth and a sliding block; the lower end surface of the lower die holder is connected with a C-shaped frame in a sliding way through a sliding rod; the upper end surface of the C-shaped frame is fixedly connected with a top block; the upper end of the top block penetrates through the lower end face of the lower die holder; the front end face of the C-shaped frame is fixedly connected with a barb strip block through a square rod; the front end surface of the upper die holder is symmetrically and fixedly connected with a square frame through an L-shaped rod; the inside of the square frame is connected with a sliding block in a sliding way; the rear end face of the sliding block is fixedly connected with barb teeth;
the pushing mechanism comprises a pushing block, a first rack, a second rack, a rotating shaft and a gear ring, wherein the pushing block is used for pushing the injection molding piece; the upper end surface of the base is symmetrically and fixedly connected with a lantern ring through a vertical rod; the inside of the lantern ring is connected with a first rack in a sliding way; the left end face of the first rack is fixedly connected with a pushing block; the middle part of the upper end surface of the base is fixedly connected with a rotating shaft through a vertical plate, and the outer part of the rotating shaft is sleeved and connected with a gear ring; the gear ring is connected with the first rack in a meshed manner; the right end face of the upper die holder is fixedly connected with a second rack through a cross rod.
As a further scheme of the invention: the outer part of the sliding rod is sleeved and connected with a first reset spring; the upper end of the first reset spring is fixedly connected to the lower end surface of the lower die holder; the lower end of the first reset spring is fixedly connected to the upper end face of the C-shaped frame.
As a further scheme of the invention: the lower end of the sliding rod is fixedly connected with a limiting block.
As a further scheme of the invention: the end surface of one side of the sliding block, which is far away from the barb strip block, is fixedly connected with a second reset spring; one end of the second reset spring, which is far away from the sliding block, is fixedly connected with the front end surface of the square frame through a fixed block; the end surface of one side of the barb tooth far away from the barb strip block is fixedly connected with a first magnetic block; the front end surface of the lower die holder is symmetrically and fixedly connected with a second magnetic block through a folding rod; the end face of one side, close to each other, of the first magnetic block and the second magnetic block is provided with opposite magnetic poles.
As a further scheme of the invention: injection molding cavities are formed in the lower end face of the upper die holder and the upper end face of the lower die holder; an air pump is arranged on the lower end surface of the lower die holder; the air pump is communicated with the injection molding cavity.
As a further scheme of the invention: the upper end face of the upper die holder is communicated with a material injection pipe.
As a further scheme of the invention: the left part of the upper end surface of the base is fixedly connected with a telescopic cylinder through an L-shaped frame; the lower end of the telescopic cylinder is fixedly connected with the upper end face of the upper die holder.
As a further scheme of the invention: the front end face and the rear end face of the gear ring are fixedly connected with iron sheet rings; the upper part of the front end surface of the second rack is fixedly connected with a first arc-shaped magnetic block through an L-shaped block; the lower part of the rear end face of the second rack is fixedly connected with a second arc-shaped magnetic block through an L-shaped block.
As a further scheme of the invention: the rear end of the rotating shaft is fixedly connected with a limiting round block.
As a further scheme of the invention: the right end face of the first rack is fixedly connected with a tension spring; the right end of the tension spring is fixedly connected with the upper end face of the base through a fixing rod.
Compared with the prior art, the invention has the beneficial effects that: the barb block, the barb strip block, the ejector block and the C-shaped frame in the ejector die mechanism are matched with each other to automatically eject the formed part, so that the die clamping condition is prevented, and the demolding efficiency is improved;
the injection molding finished molding piece can be automatically pushed and removed through the mutual matching of the first rack, the second rack, the gear ring, the tension spring, the first arc-shaped magnetic block, the second arc-shaped magnetic block and the iron sheet ring in the pushing mechanism, so that the production efficiency is improved.
Other features and advantages of the present invention will be disclosed in the following detailed description of the invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the portion A of FIG. 1 according to the present invention;
FIG. 3 is an enlarged schematic view of the portion B of FIG. 1 according to the present invention;
FIG. 4 is an enlarged schematic view of the rear view of the portion B of FIG. 3 in accordance with the present invention;
FIG. 5 is a schematic view of the rear view of the overall structure of the present invention;
FIG. 6 is an enlarged schematic view of the structure of portion C in FIG. 5 according to the present invention;
FIG. 7 is an enlarged schematic cross-sectional view of the lower die holder of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 7, in an embodiment of the present invention, the injection mold 100 for thermoplastic plastics includes an upper mold base 10, a lower mold base 20, and a base 30. The left part of the upper end surface of the base 30 is fixedly connected with the lower die holder 20 through a fixing frame 31. The upper end surface of the lower die holder 20 is fixedly connected with a guide post 21 for connecting the upper die holder 10 and the lower die holder 20. The guide post 21 is connected to the upper die holder 10 in a penetrating and sliding manner. The front end surfaces of the upper die holder 10 and the lower die holder 20 are provided with a die ejecting mechanism 40 for ejecting the molded article. The right part of the upper end surface of the base 30 is provided with a pushing mechanism 50 for pushing away the molded part. Can automatically eject and push away the injection molding part after injection molding.
The ejector mechanism 40 includes an ejector block 41 of the ejector die, a C-shaped frame 42, a slide bar 43, a barbed bar 44, a square frame 45, barbed teeth 46, and a slider 47. The lower end surface of the lower die holder 20 is slidably connected with a C-shaped frame 42 through a sliding rod 43. The upper end face of the C-shaped frame 42 is fixedly connected with a top block 41. The upper end of the top block 41 penetrates the lower end surface of the lower die holder 20. The front end surface of the C-shaped frame 42 is fixedly connected with a barb bar 44 through a square rod. The front end surface of the upper die holder 10 is symmetrically and fixedly connected with a square frame 45 through an L-shaped rod. The square frame 45 is internally and slidably connected with a slide block 47. The rear end face of the sliding block 47 is fixedly connected with barb teeth 46. Through automatic ejecting injection molding spare from injection molding spare inslot when injection molding is accomplished, prevent the condition of card mould.
The pushing mechanism 50 includes a pushing block 51 for pushing the injection-molded piece, a first rack 52, a second rack 53, a rotating shaft 54, and a ring gear 55. The upper end surface of the base 30 is fixedly connected with a lantern ring 32 through vertical rods. The collar 32 has a first rack 52 slidably coupled thereto. The left end face of the first rack 52 is fixedly connected with a push block 51. The middle part of the upper end surface of the base 30 is fixedly connected with a rotating shaft 54 through a vertical plate. The rotary shaft 54 is externally sleeved with a gear ring 55. The ring gear 55 is in meshed connection with the first rack 52. The right end surface of the upper die holder 10 is fixedly connected with a second rack 53 through a cross rod. The molding part can be automatically jacked away, and the injection molding efficiency is improved.
In this embodiment, the slide lever 43 is externally engaged with a first return spring 431. The upper end of the first return spring 431 is fixedly connected to the lower end surface of the lower die holder 20. The lower end of the first return spring 431 is fixedly connected to the upper end surface of the C-shaped frame 42. The C-shaped frame 42 can be reset.
In this embodiment, a limiting block 432 is fixedly connected to the lower end of the sliding rod 43. Preventing the C-shaped frame 42 from falling off the slide bar.
In this embodiment, a second return spring 471 is fixedly connected to an end surface of the slider 47 on a side away from the barbed bar 44. One end of the second return spring 471, which is far away from the sliding block 47, is fixedly connected to the front end face of the square frame 45 through a fixing block. The end surface of the side of the barb teeth 46 away from the barb strip 44 is fixedly connected with a first magnetic block 461. The front end surface of the lower die holder 20 is symmetrically and fixedly connected with a second magnetic block 22 through a folding rod. The first magnetic block 461 and the second magnetic block 22 have opposite magnetic poles on the end faces on the sides close to each other. So that the first magnetic block 461 and the second magnetic block 22 can attract each other when they are close to each other.
In this embodiment, injection molding grooves are formed on the lower end surface of the upper die holder 10 and the upper end surface of the lower die holder 20. The lower end face of the lower die holder is provided with an air pump 23. The air pump 23 is communicated with the injection molding cavity. The ventilation can be carried out in the injection molding cavity formed by the upper die and the lower die. The molded part is easier to eject from the injection molding cavity of the lower die holder.
In this embodiment, the upper end surface of the upper die holder 10 is communicated with a material injection pipe. Can play a role in injecting materials.
In this embodiment, the left part of the upper end surface of the base 30 is fixedly connected with a telescopic cylinder 33 through an L-shaped frame. The lower end of the telescopic cylinder 33 is fixedly connected with the upper end surface of the upper die holder 10.
In this embodiment, the front end face and the rear end face of the ring gear 55 are fixedly connected with iron sheet rings 551. The upper part of the front end surface of the second rack 53 is fixedly connected with a first arc-shaped magnetic block 531 through an L-shaped block. The lower part of the rear end surface of the second rack is fixedly connected with a second arc-shaped magnetic block 532 through an L-shaped block. The attraction force of the first arc-shaped magnetic block 531 and the second arc-shaped magnetic block 532 to the iron sheet coil 551. The ring gear 55 can be caused to move outside the rotation shaft 54. And further, whether the ring gear 55 meshes with the second rack 53 can be controlled.
In this embodiment, a limit knob 541 is fixedly connected to the rear end of the rotating shaft 54. Can play a limiting role. Preventing the ring gear 55 from coming off.
In this embodiment, a tension spring 521 is fixedly connected to the right end surface of the first rack 52. The right end of the tension spring 521 is fixedly connected with the upper end surface of the base through a fixing rod. The first rack 52 can be reset.
When in use, the initial states of the upper die holder 10 and the lower die holder 20 are mutually attached together, molten thermoplastic plastics are poured into the injection molding cavities of the upper die and the lower die through the injection molding pipe, after cooling is finished, the air pump 23 is used for ventilating the injection molding cavities, then the telescopic air cylinder 33 is started simultaneously to shrink, the upper die holder 10 is pulled to rise, the square frame 45 is driven to rise through the L-shaped rod, the barb teeth 46 are driven to rise under the pull of the second reset spring 471 to clamp the barb bar 44, the barb bar 44 is driven to rise, the C-shaped frame 42 is driven to rise through the square rod, the first reset spring 431 is compressed, the ejector block 41 is driven to rise, the injection molded part after injection molding is ejected from the lower die holder 20, when the square frame 45 moves to a position horizontal with the second magnetic block 22, the second magnetic block 22 attracts the first magnetic block 461 to move, and further pulls the barb teeth 46 to move away from each other, so that the barb teeth 46 and the barb bar 44 are separated from each other, then the first reset spring 431 resets to expand, and further drives the C-shaped frame 42 to move downwards, meanwhile, as the air pump 23 continuously supplies air into the injection cavity of the lower die holder 20, the injection molding part is suspended, the upper die holder 10 rises and drives the first arc magnetic block 531 to rise, the initial position of the first arc magnetic block 531 and the iron sheet ring 551 in front of the gear ring 55 are in the same horizontal direction, at this time, under the suction of the first arc magnetic block 531, the gear ring 55 moves forwards, and is meshed with the second gear rack 53, and when the upper die holder 10 rises, the second gear rack 53 is driven to move upwards, and further the gear ring 55 is driven to rotate, and further the first gear rack 52 is driven to move leftwards, and the push block 51 is driven to move leftwards, at this time, the tension spring 521 is stretched by the first rack 52, so as to push out the injection molding piece, when the upper die holder 10 rises to the uppermost position, at this time, the second arc-shaped magnetic block 532 and the iron sheet ring 551 at the rear part of the gear ring 55 are positioned on the same horizontal line, at this time, the second arc-shaped magnetic block 532 can attract the gear ring 55 to move backwards, so that the gear ring 55 is separated from the second rack 53, then the tension spring 521 is reset to shrink and pull the first rack 52 to move rightwards for resetting, then the second rack 53 is prevented from driving the gear ring 55 to rotate in the process of descending the upper die holder 10 when the next injection molding piece is carried out, and the operation is repeated repeatedly after the next injection molding is finished, so that the injection molding piece is automatically pushed away.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (5)
1. An injection mold for thermoplastic plastics comprises an upper mold base, a lower mold base and a base, wherein the upper mold base, the lower mold base and the base are used for forming an injection mold main body; the die is characterized in that the left part of the upper end surface of the base is fixedly connected with the lower die holder through a fixing frame; the upper end surface of the lower die holder is fixedly connected with a guide post for connecting the upper die holder and the lower die holder; the guide post is connected with the upper die holder in a penetrating and sliding manner; the front end surfaces of the upper die base and the lower die base are provided with a die ejection mechanism for ejecting the formed part; a pushing mechanism for pushing away the formed part is arranged at the right part of the upper end surface of the base;
the ejection die mechanism comprises an ejection block for ejecting the formed part, a C-shaped frame, a sliding rod, barb strip blocks, a square frame, barb teeth and a sliding block; the lower end face of the lower die holder is connected with the C-shaped frame in a sliding way through a sliding rod; the upper end face of the C-shaped frame is fixedly connected with the top block; the upper end of the top block penetrates through the lower end face of the lower die holder; the front end face of the C-shaped frame is fixedly connected with the barb strip blocks through square rods; the front end surface of the upper die holder is symmetrically and fixedly connected with the square frame through an L-shaped rod; the inside of the square frame is connected with a sliding block in a sliding manner; the barb teeth are fixedly connected to the rear end face of the sliding block;
the pushing mechanism comprises a pushing block, a first rack, a second rack, a rotating shaft and a gear ring, wherein the pushing block is used for pushing the injection molding piece; the upper end surface of the base is symmetrically and fixedly connected with a lantern ring through a vertical rod; the first rack is connected inside the lantern ring in a sliding manner; the pushing block is fixedly connected to the left end face of the first rack; the middle part of the upper end surface of the base is fixedly connected with the rotating shaft through a vertical plate; the gear ring is sleeved and connected to the outer part of the rotating shaft; the gear ring is in meshed connection with the first rack; the right end face of the upper die holder is fixedly connected with the second rack through a cross rod;
the sliding rod is sleeved with a first reset spring; the upper end of the first reset spring is fixedly connected to the lower end face of the lower die holder; the lower end of the first reset spring is fixedly connected to the upper end face of the C-shaped frame;
a limiting block is connected to the lower end of the sliding rod;
injection molding cavities are formed in the lower end face of the upper die holder and the upper end face of the lower die holder; an air pump is arranged on the lower end face of the lower die holder; the air pump is communicated with the injection molding cavity;
the upper end surface of the upper die holder is communicated with a material injection pipe;
the left part of the upper end surface of the base is fixedly connected with a telescopic cylinder through an L-shaped frame; the lower end of the telescopic cylinder is fixedly connected to the upper end face of the upper die holder.
2. An injection mold for thermoplastic according to claim 1, wherein a second return spring is fixedly connected to an end surface of the side of the slider remote from the barbed strand; one end, away from the sliding block, of the second reset spring is fixedly connected to the front end face of the square frame through a fixed block; the end face of one side of the barb tooth far away from the barb strip block is fixedly connected with a first magnetic block; the front end surface of the lower die holder is symmetrically and fixedly connected with a second magnetic block through a folding rod; the end face of one side, close to each other, of the first magnetic block and the second magnetic block is opposite in magnetic pole.
3. An injection mold for thermoplastic plastics according to claim 1, wherein the front end face and the rear end face of the ring gear are fixedly connected with iron sheet rings; the upper part of the front end surface of the second rack is fixedly connected with a first arc-shaped magnetic block through an L-shaped block; the lower part of the rear end face of the second rack is fixedly connected with a second arc-shaped magnetic block through the L-shaped block.
4. An injection mold for thermoplastic according to claim 1, wherein the rear end of the rotating shaft is fixedly connected with a limit round block.
5. The injection mold for thermoplastic according to claim 1, wherein the right end surface of the first rack is fixedly connected with a tension spring; the right end of the tension spring is fixedly connected with the upper end face of the base through a fixing rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110746002.5A CN113459414B (en) | 2021-07-01 | 2021-07-01 | Injection mold for thermoplastic plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110746002.5A CN113459414B (en) | 2021-07-01 | 2021-07-01 | Injection mold for thermoplastic plastics |
Publications (2)
| Publication Number | Publication Date |
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| CN113459414A CN113459414A (en) | 2021-10-01 |
| CN113459414B true CN113459414B (en) | 2023-05-02 |
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| CN202110746002.5A Active CN113459414B (en) | 2021-07-01 | 2021-07-01 | Injection mold for thermoplastic plastics |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005098442A (en) * | 2003-09-26 | 2005-04-14 | Borg Warner Morse Tec Japan Kk | Method of manufacturing pole retainer |
| CN212472275U (en) * | 2020-03-20 | 2021-02-05 | 北京顺辉佳塑料包装制品有限公司 | Injection mold demoulding structure |
| CN111391255A (en) * | 2020-04-29 | 2020-07-10 | 安徽壹太电气有限公司 | Integrated novel injection molding decoration strip device for freezing |
| CN112026111A (en) * | 2020-08-12 | 2020-12-04 | 韦健娇 | Injection mold with automatic ejection mechanism and convenient to demold and using method |
| CN112388926A (en) * | 2020-10-27 | 2021-02-23 | 庞红星 | Injection mold cooling collet |
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