CN111633928A - Internal core-pulling injection mold - Google Patents
Internal core-pulling injection mold Download PDFInfo
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- CN111633928A CN111633928A CN202010466173.8A CN202010466173A CN111633928A CN 111633928 A CN111633928 A CN 111633928A CN 202010466173 A CN202010466173 A CN 202010466173A CN 111633928 A CN111633928 A CN 111633928A
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- plate
- movable mold
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- sleeve
- push plate
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- 239000007924 injection Substances 0.000 title claims abstract description 28
- 238000002347 injection Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 238000007789 sealing Methods 0.000 claims description 37
- 238000001816 cooling Methods 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000000047 product Substances 0.000 description 30
- 230000007246 mechanism Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 238000004806 packaging method and process Methods 0.000 description 7
- 230000000149 penetrating effect Effects 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 239000002537 cosmetic Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 239000003292 glue Substances 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000012899 standard injection Substances 0.000 description 1
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- 238000002834 transmittance Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Images
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
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
-
- 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
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/43—Removing or ejecting moulded articles using fluid under pressure
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides an internal core-pulling injection mold which comprises a movable mold push plate, a movable mold core plate and a support plate, wherein a piston mold plate is further arranged between the movable mold push plate and the movable mold core plate, a push plate type cavity sleeve is embedded in the movable mold push plate, a cylinder sleeve is embedded in the piston mold plate, a movable mold core is embedded in the movable mold core plate, a tunnel hole is formed in the movable mold core, two internal core-pulling slide blocks which are arranged in a back-to-back mode are connected in the tunnel hole in a sliding mode, each internal core-pulling slide block comprises a forming portion and a guide portion, oblique guide surfaces are respectively formed on opposite sides of the two internal core-pulling slide blocks, a convex edge is arranged on one side of the forming portion, a guide surface is arranged on one side of the. The invention effectively solves the problem that the outer cover of the bottle cap is difficult to demould due to back-off, can realize mass production in an injection molding mode, and has relatively good consumption experience and relatively low production cost.
Description
Technical Field
The invention relates to a mold, in particular to an internal core-pulling injection mold.
Background
With the continuous high-speed development of the skin care product market, the market competition of the skin care product is more and more intense, particularly, the middle and high-end cosmetic market is particularly obvious, the good and bad design of the middle and high-end cosmetic packaging directly influences the sale of commodities, and some cosmetic packaging bottles with higher grade are often made of glass in order to achieve the good texture and high-transparency effect of appearance.
Therefore, the applicant designs a glass-like plastic packaging bottle, in order to ensure that the packaging bottle has a thicker appearance and a thicker hand feeling similar to the glass packaging bottle and to avoid the shrinkage phenomenon during injection molding, the bottle cap of the plastic packaging bottle is designed to be a split combined cap which consists of an outer cap formed by injection molding of high-transparency plastic and an electroplated inner cap fastened in an inner cavity of the outer cap, in order to realize fastening of the outer cap and the electroplated inner cap, a fastening groove or a convex fastener needs to be arranged in the inner cavity of the outer cap, so that the inner cavity of the outer cap forms an inverted fastener structure and is difficult to demold, in the existing injection mold structure, the inverted fastener structure usually adopts a core-pulling mechanism such as a forced demolding mechanism or a slide block side-pulling and oblique-pushing mechanism to solve the problem of difficult demolding, however, in order to ensure that the bottle cap has a texture similar to glass, the injection molding material usually needs to adopt a hard, meanwhile, in order to ensure that the bottle cap has the aesthetic feeling and the grade similar to the transparent and bright glass bottle cap, no mark of an insert is allowed to be left on the bottle cap, the problem of difficult demoulding is difficult to solve through core-pulling mechanisms such as sliding block side-pulling and inclined top, the inner diameter of the bottle cap is usually only 20-25mm, the size is relatively small, and the core-pulling mechanisms such as the inclined top are not placed in enough space, so that the glass-like plastic packaging bottle is difficult to realize mass production in an injection molding mode due to the problems.
In view of the above, the applicant has made intensive studies to solve the above problems and has made the present invention.
Disclosure of Invention
The invention aims to provide the internal core-pulling injection mold which can realize mass production in an injection molding mode, and the obtained bottle cap has relatively good consumption experience and relatively low production cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
an inner core-pulling injection mold comprises a movable mold push plate, a movable mold core plate and a supporting plate which are sequentially arranged, wherein a piston template fixedly connected with the movable mold core plate is further arranged between the movable mold push plate and the movable mold core plate, a push plate type cavity sleeve is embedded in the movable mold push plate, a cylinder sleeve is embedded in the piston template, a movable mold core sequentially inserted in the cylinder sleeve and the push plate type cavity sleeve is embedded in the movable mold core plate, a tunnel hole which is perpendicular to the movable mold core is formed in the movable mold core, two inner core-pulling sliding blocks which are arranged in a back-to-back mode are slidably connected in the tunnel hole, each inner core-pulling sliding block comprises a forming part inserted in the push plate type cavity sleeve and a guide part which is integrally connected with the forming part and inserted in the cylinder sleeve, and inclined guide surfaces which are arranged in a splayed mode are respectively formed on opposite sides of the two inner, one side of the forming part, which is far away from the corresponding inclined guide surface, is provided with a convex edge, one side of the guide part, which is far away from the corresponding inclined guide surface, is provided with a guide surface, the supporting plate is fixedly connected with a slider base which is inserted in the movable mould core, the slider base is provided with two inclined push surfaces which are respectively matched with the inclined guide surfaces in a one-to-one manner, and the cylinder sleeve is provided with push guide surfaces which are matched with the guide surfaces in a one-to-one manner.
As a refinement of the invention, the length of the guide section is greater than the length of the profile section.
As an improvement of the invention, a first reset rod is fixedly connected to the movable mold push plate, a second reset rod is fixedly connected to the movable mold core plate, and a first needle plate group matched with the first reset rod and a second needle plate group matched with the second reset rod are further arranged on one side of the support plate away from the movable mold core plate.
As an improvement of the present invention, the second pin plate group includes a second pin plate and a second bottom pin plate which are fixedly connected to each other, the second pin plate is fixedly connected to a water transporting jacket in a sealing manner, one end of the water transporting jacket, which is far away from the second pin plate, penetrates through the slider base and is fixedly connected to a side wall of the tunnel hole, which is far away from the second pin plate, in a sealing manner, a cooling hole communicated with the water transporting jacket is formed in the side wall of the tunnel hole, which is far away from the second pin plate, a spray pipe is fixedly connected to the second bottom pin plate, the spray pipe is sequentially inserted into the water transporting jacket and the cooling hole, an outer diameter of the spray pipe is smaller than inner diameters of.
As an improvement of the present invention, an air inlet channel is arranged on the piston template, a first sealing ring matched with the moving die push plate is arranged at one end of the cylinder sleeve facing the moving die push plate, the first sealing ring coats an inner hole opening of the cylinder sleeve, a second sealing ring matched with the moving die core is arranged on an inner hole wall of the cylinder sleeve, an air hole respectively communicated with the inner hole of the cylinder sleeve and the air inlet channel is arranged on the cylinder sleeve, and the air hole is located between the second sealing ring and the first sealing ring.
As an improvement of the invention, a third sealing ring matched with the sliding block base is arranged on the side wall of the inner hole of the movable mold core.
As an improvement of the invention, an annular gas groove is formed in the outer side wall of the cylinder sleeve, the gas hole is formed in the bottom of the annular gas groove, and fourth sealing rings are respectively arranged at the positions of the two sides of the annular gas groove of the cylinder sleeve.
As an improvement of the invention, an annular water tank is arranged on the outer side wall of the push plate type cavity sleeve and/or the movable mold core, and fifth sealing rings are respectively arranged on two sides of the annular water tank.
An inner core-pulling injection mold comprises a movable mold push plate, a movable mold core plate and a supporting plate which are sequentially arranged, wherein a piston template fixedly connected with the movable mold core plate is further arranged between the movable mold push plate and the movable mold core plate, a push plate type cavity sleeve is embedded in the movable mold push plate, a movable mold core which is sequentially inserted in the piston template and the push plate cavity sleeve is embedded in the movable mold core plate, a tunnel hole which is perpendicular to the movable mold core is formed in the movable mold core, two inner core-pulling sliding blocks which are arranged in a back-to-back mode are connected in the tunnel hole in a sliding mode, each inner core-pulling sliding block comprises a forming part which is inserted in the push plate cavity sleeve and a guide part which is integrally connected with the forming part and inserted in the cylinder sleeve, inclined guide surfaces which are arranged in a splayed mode are respectively formed on opposite sides of the two inner core-pulling sliding blocks, and a convex edge is arranged on one, one side of the guide part, which is far away from the corresponding inclined guide surface, is provided with a guide surface, the support plate is fixedly connected with a sliding block base which is inserted in the movable mould core, the sliding block base is provided with two inclined push surfaces which are respectively matched with the inclined guide surfaces in a one-to-one manner, and the piston mould plate is provided with push guide surfaces which are matched with the guide surfaces in a one-to-one manner.
By adopting the technical scheme, the invention has the following beneficial effects:
1. through setting up tunnel hole and interior slider of loosing core, the problem that the enclosing cover of bottle lid exists is difficult to the drawing of patterns because of the back-off has effectively been solved, can realize the volume production through injection moulding's mode, can not have the vestige of mold insert on the bottle lid simultaneously, the bottle lid has the penetrating aesthetic feeling and the grade of shining of similar glass bottle lid, and the dead weight is little, difficult damage, the transportation expense is low, do benefit to and carry, and secondary working performance such as printing is good, consumption experience is better relatively and manufacturing cost is lower relatively.
2. By arranging the water conveying sleeve and the spray pipe, the cooling time in the injection molding cycle is effectively reduced, the quality of injection molded products is improved, and the injection molding efficiency is improved.
3. Through setting up inlet channel and gas pocket, avoid leading to being difficult to take out the mode of the absorption through the sucking disc from the mould cavity because of forming the negative pressure in the die cavity after moulding plastics.
4. The tunnel type hidden drawing mechanism is designed and applied, so that the problem of demoulding of product inversed buckles is solved, the assembly function of the product is met, and no insert mark is left on the transparent product, so that the product keeps good appearance. The whole structure is compact and ingenious, the functions are stable, the occupied space is small, the mould can realize the upgrading of one mould with multiple cavities, the quality of the product is ensured, and the production efficiency is improved.
5. Through the design and application of the cooling system with the secondary ejection structure, the water conveying sleeve and the movable mold core are fixedly connected and advance and retreat together, the core is cooled rapidly, the product forming period is shortened, the product is prevented from having quality abnormity such as bubbles, shrinkage marks, welding marks, surface fog and patterns, the good texture and appearance high-transparency effect is achieved, and the product qualification rate and the production efficiency are greatly improved.
6. The vacuum suction in the die cavity is relieved by designing and applying the gas-assisted ejection device, the product is easier to demold from the die cavity, the demolding action is smoother, the risk of die assembly rear pressing die caused by product adhesion is avoided, and the production efficiency of the product is improved.
Drawings
Fig. 1 is a schematic structural view of a bottle cap to be formed in an embodiment;
FIG. 2 is a schematic front view of an inner core-pulling injection mold in the embodiment;
FIG. 3 is a schematic side view of an inner core-pulling injection mold in the embodiment;
FIG. 4 is a sectional structure diagram of an inner core-pulling structure of the inner core-pulling injection mold in the embodiment;
fig. 5 is a sectional axial schematic view of an inner core pulling structure of the inner core pulling injection mold in the embodiment.
The designations in the figures correspond to the following:
10 a cover body; 11-lumen;
12-a catching groove; 21-moving die push plate;
22-moving mould core plate; 23-a support plate;
24-fixing a template; 25-guide pillars;
26-a piston template; 27-a first reset lever;
28-a second reset bar; 31-pusher-type chamber sleeve;
32-cylinder liner; 33-a moving mold core;
34-inner core-pulling slide block; 35-a slider base;
36-water conveying sleeve;
37-cooling holes; 38-a nozzle;
39-annular water tank; 40-a first group of needle plates;
41-a first face needle plate; 42-a first bed plate;
50-a second needle set; 51-a second face pin plate;
52-a second bed plate; 61-a first sealing ring;
62-a second seal ring; 63-a third seal ring;
64-a fourth seal ring; 65-air holes;
66-annular gas groove.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
The bottle cap to be formed by the internal core pulling injection mold provided by the embodiment is shown in fig. 1, and the bottle cap has a cap body 10, the shape of which is gradually changed from a circular shape to a square shape, the cap body 10 is a hard glue transparent cap body, and is preferably made of an AS material, which has high impact strength, heat resistance, oil resistance and chemical corrosion resistance, is not prone to internal stress cracking, and has high transparency. The cover body 10 is provided with an inner cavity 11 with an opening, the opening of the inner cavity 11 is located at one end of the cover body 10 in a circular shape, the inner diameter of the opening of the inner cavity 11 is 22mm, the side wall of the opening of the inner cavity 11 is provided with symmetrically arranged fastening grooves 12 and symmetrically arranged convex fasteners, a connecting line between the two convex fasteners (the connecting line is a virtual line) and a connecting line between the two fastening grooves 12 are arranged in a mutually perpendicular mode, and of course, the fastening grooves 12 can be only provided with the fastening grooves 12 or the convex fasteners according to actual needs.
As shown in fig. 2 to fig. 5 and fig. 1, the inner core-pulling injection mold provided in this embodiment includes a movable mold push plate 21, a movable mold core plate 22, and a support plate 23, which are sequentially arranged, and certainly should also include parts such as a fixed mold plate 24 and a guide post 25, and a connection structure of the parts such as the movable mold push plate 21, the movable mold core plate 22, the support plate 23, the fixed mold plate 24, and the guide post 25 is the same as a structure of a standard injection mold frame directly available from the market, which is not a key point of this embodiment, and is not described in detail here. In the present embodiment, the structure of the inner core back injection mold will be described by taking a clamped state as an example.
A piston template 26 fixedly connected with the movable model core plate 22 is further arranged between the movable mould push plate 21 and the movable model core plate 22, a push plate cavity sleeve 31 penetrating through the movable mould push plate 21 is embedded on the movable mould push plate 21, a cylinder sleeve 32 penetrating through the piston template 26 is embedded on the piston template 26, a movable mould core 33 penetrating through the movable model core plate 22 and sequentially penetrating into the cylinder sleeve 32 and the push plate cavity sleeve 31 is embedded on the movable model core plate 22, the push plate cavity sleeve 31, the cylinder sleeve 32 and the movable mould core 33 are coaxially arranged to form an internal core-pulling structure, wherein a part of the movable mould core 33 penetrating through the push plate cavity sleeve 31 and an inner hole of the push plate cavity sleeve 31 form a cavity for molding the cover body 10 together, and it should be noted that the push plate cavity sleeve 31, the cylinder sleeve 32 and the movable mould core 33 which are coaxially arranged to each other are not limited to only one group, but a plurality of groups can be arranged to, further, the productivity is improved, and for convenience of description, only one set of the push plate cavity sleeve 31, the cylinder sleeve 32 and the moving mold core 33, which are coaxially arranged with each other, will be described as an example.
The movable mold core 33 is provided with a tunnel hole which is vertically arranged with the movable mold core 33, the tunnel hole penetrates through the movable mold core 33, and the width is 14.0mm (in this embodiment, the depth direction of the tunnel hole is taken as the length direction, the axial direction of the movable mold core 33 is taken as the height direction, and the direction perpendicular to the length direction and the height direction is taken as the width direction), two inner core-pulling sliding blocks 34 which are arranged oppositely are connected in the tunnel hole in a sliding way, each inner core-pulling sliding block 34 comprises a forming part which is inserted in the push plate type cavity sleeve 31 and a guide part which is integrally connected with the forming part and is inserted in the cylinder sleeve 32, in the same inner core pulling slide block 34, the length of the guide part is greater than that of the forming part, so that the cross section of the inner core pulling slide block 34 in the vertical width direction is L-shaped, therefore, the rigidity of the inner core-pulling sliding block 34 can be increased, and the stability of the action of the inner core-pulling sliding block can be saved. The two inner core-pulling sliders 34 are respectively formed with an oblique guide surface arranged in a splayed manner on opposite sides, that is, the two oblique guide surfaces are in a splayed manner, specifically, the distance between the two oblique guide surfaces gradually increases from one end of the two oblique guide surfaces relatively close to the push plate type cavity sleeve 31 to the other end, and the inclination angle of each oblique guide surface relative to the symmetric central planes of the two oblique guide surfaces is six degrees. The side of the forming part far away from the corresponding inclined guide surface is provided with a convex edge for forming the buckle groove 12, namely the forming part also forms a part of the side wall of the forming cavity. One side of each guide part, which is far away from the corresponding inclined guide surface, is provided with a guide surface, and the guide surfaces of the two guide parts are also arranged in a splayed manner.
The supporting plate 23 is fixedly connected with a sliding block base 35 inserted in the movable mold core 33 in a penetrating mode, one end of the sliding block base 35 abuts against the side wall of one side, away from the supporting plate 23, of the tunnel hole, two inclined pushing faces matched with the inclined guiding faces in a one-to-one mode are arranged on the sliding block base 35, meanwhile, a pushing face matched with the guiding faces in a one-to-one mode is arranged on the cylinder sleeve 32, and the number of the machine pushing faces is two. Instead of the cylinder liner 32, the piston mold plate 26 may be provided with a through hole similar to the inner hole of the cylinder liner 32, and the side wall of the through hole may be provided with guide surfaces that are engaged with the guide surfaces in a one-to-one manner.
Preferably, in order to enable the movable mold pushing plate 21 and the movable mold core plate 22 to perform mold opening operation under the action of a push rod of the injection molding machine during mold opening, a first reset rod 27 is fixedly connected to the movable mold pushing plate 21, a second reset rod 28 is fixedly connected to the movable mold core plate 22, a first needle plate group 40 matched with the first reset rod 27 and a second needle plate group 50 matched with the second reset rod 28 are further arranged on one side of the supporting plate 23 away from the movable mold core plate 22, wherein the first needle plate group 40 is located between the second needle plate group 50 and the supporting plate 23, the first needle plate group 40 comprises a first needle plate 41 and a first bottom needle plate 42 which are fixedly connected with each other, the second needle plate group 50 comprises a second needle plate 51 and a second bottom needle plate 52 which are fixedly connected with each other, and the specific connection structure between each reset rod and the corresponding needle plate group and the specific connection structure between each reset rod and other parts are the same as the structure of a conventional injection mold base, and will not be described in detail herein.
When the mold is used, after the mold is opened, the movable mold core 22 drives the movable mold core 33 to move forward (in this embodiment, the direction toward the fixed mold plate 24 is used as the front, and the opposite direction is used as the back) under the pushing of the corresponding needle plate group, the movable mold core 33 drives the inner core-pulling sliders 34 arranged in the tunnel holes to move forward synchronously, because the slider base 35 is fixed on the support plate 23, when the movable mold core 22 is separated from the support plate 23, the two inner core-pulling sliders 34 slide in opposite directions under the action of the corresponding inclined guide surfaces and the inclined push surfaces to realize the core-pulling action of the sliders, and when the mold is closed, the two inner core-pulling sliders 34 slide in opposite directions under the action of the corresponding guide surfaces and the push surfaces to realize the reset. The interior structure of loosing core that this embodiment provided has effectively solved the drawing of patterns problem of product back-off, has both satisfied the assembly function of product, can not leave the mold insert vestige on transparent product again, makes the product keep good outward appearance, and overall structure is compact ingenious, and the stable function, and occupation space is little, makes the mould can realize the upgrading in a mould many caves, has both guaranteed the quality of product and has improved production efficiency again.
Preferably, in order to reduce the cooling time in the injection molding cycle and avoid the problems of shrinkage deformation, yellowing, low transmittance and the like caused by uneven shrinkage of the cover body 10 due to uneven wall thickness, in the present embodiment, the second surface needle plate 51 is fixedly connected with the water transporting sleeve 36 in a sealing manner, a sealing ring is arranged between one end of the water transporting sleeve 36 and the second bottom needle plate 52, one end of the water transporting sleeve 36 away from the second surface needle plate 51 penetrates through the slider base 35 and is fixedly connected to the side wall of the tunnel hole on the side away from the second surface needle plate 51 in a sealing manner, and specifically, a sealing ring is also arranged between the water transporting sleeve 36 and the side wall of the tunnel hole; the side wall of the tunnel hole, which is far away from the side of the second needle plate 51, is provided with a cooling hole 37 communicated with the water conveying sleeve 36 and used for cooling products in the cavity, the second bottom needle plate 52 is fixedly connected with a spray pipe 38 which is sequentially inserted in the water conveying sleeve 36 and the cooling hole 37, the outer diameter of the spray pipe 38 is smaller than the inner diameters of the water conveying sleeve 36 and the cooling hole 37, and a gap is formed between the bottom of the spray pipe 38 and the bottom of the cooling hole 37. When the bottle cap is used, one end of the spray pipe 38 fixedly connected with the second bottom needle plate 52 is connected with an external water inlet pipe, one end of the water conveying sleeve 36 fixedly connected with the second surface needle plate 51 is connected with an external water outlet pipe, it should be noted that the external water inlet pipe and the external water outlet pipe do not belong to one part of the internal core pulling bottle cap in the embodiment, and need to be additionally configured when in use, and the specific connection structure between the external water inlet pipe and the external water outlet pipe and the spray pipe 38 or the water conveying sleeve 36 is the same as the connection structure of a conventional water pipe and an injection mold. When the mold is closed, the movable mold core plate 22 is pushed by the corresponding needle plate group to drive the movable mold core 33 to move forwards, in the process, the water conveying sleeve 36 and the spray pipe 38 can simultaneously act to keep the relative position relation with the movable mold core 33 unchanged, and the cooling water is conveyed into the cooling hole 37 of the movable mold core 33 through the spray pipe 38 and flows back through the water conveying sleeve 36 to complete the cooling circuit. In addition, an annular water groove 39 is formed in the outer side wall of the push plate cavity sleeve 31 and/or the moving mold core 33, fifth sealing rings are respectively arranged on two sides of the annular water groove 39, the annular water groove is communicated with a cooling circuit arranged on the corresponding plate, the specific structure of the cooling circuit is the same as that of a conventional injection mold, and detailed description is omitted here. Through set up a fortune water cover 36 in the slider base 35 of interior loose core, the up end of fortune water cover 36 and movable mould core 33 tunnel face fixed contact to in the installation sealing washer prevents that the cooling water from leaking to the mechanism of loosing core that contracts in, the lower terminal surface of fortune water cover 36 is fixed with second face faller 51, and second face faller 51 is connected fixedly through release link and core fixed plate. The movable mould core plate 22 drives the movable mould core to move forwards under the pushing of the second face needle plate 51, meanwhile, the water conveying sleeve 36 on the second face needle plate 51 also props against the tunnel surface of the movable mould core, cooling water is conveyed to the movable mould core through the spray pipe of the second bottom needle plate 52, and the cooling water flows back to the water distribution core of the second bottom needle plate 52 through the water conveying sleeve to flow out, so that the cooling loop is completed.
Because the shape of the cover body 10 is changed from round to square and is of an inverted cone structure, the whole cover body 10 is retained in the push plate type cavity sleeve 31 after the mold is opened, if the cover body is pushed out by adopting a traditional thimble structure, thimble marks are easily left on the surface of the cover body, and the product quality is influenced, the cover body 10 is required to be sucked and taken out from the push plate type cavity sleeve 31 by a mechanical arm through a suction cup, however, after the injection molding is full, vacuum or negative pressure is easily formed in the cavity, so that the suction cup needs to use larger suction force to suck the cover body 10 out from the push plate type cavity sleeve 31, the marks are easily left on the outer surface of the cover body 10, even due to the occurrence of a compression molding phenomenon, how to enable an inner-shrinkage core-pulling mechanism in the movable mold core 33 to form a sealed space, which is a key condition for realizing gas-assisted ejection, and the, the cylinder sleeve is fixed on a piston template provided with an air inlet channel, and the piston template is fixedly connected with a movable mould push plate. The upper end surface of the cylinder sleeve 32 is provided with a sealing ring for sealing the movable mould core 33 and a transverse air leakage channel of the inner loose core, a gap is reserved between the inner hole of the cylinder sleeve 32 and the outer surface of the movable mould core 33, the side wall of the lower end of the inner hole of the cylinder sleeve 32 is provided with a groove, a steckel sealing ring is arranged in the groove, a cylindrical mould core piston column is arranged below a tunnel opening of the movable mould core 33, the steckel sealing ring is in contact sealing with the outer diameter of the mould core piston column and can reciprocate on the mould core piston column, when the movable mould push plate 21 moves up and down for demoulding, the longitudinal air leakage channel of the movable mould core 33 is sealed, the lower end of the movable mould core 33 is provided with a piston hole, the lower end of the inner loose core slide block base 35 is provided with a piston column, the side wall of the lower end of the piston hole, the inner core-pulling slider base 35 can reciprocate on a piston column of the inner core-pulling slider base 35, when the movable mold core 33 and the inner core-pulling slider base 35 move up and down to pull the core, a longitudinal air leakage channel of the inner core-pulling slider base 35 is sealed, so that a sealing space is formed between the inner core-pulling mechanism in the movable mold core 33 and a product, specifically, in the embodiment, an air inlet channel (not shown in the figure) is arranged on the piston template 26, a first sealing ring 61 matched with the movable mold push plate 21 is arranged at one end, facing the movable mold push plate 21, of the cylinder sleeve 32, the first sealing ring 61 coats an inner hole opening part of the cylinder sleeve 32, a second sealing ring 62 matched with the movable mold core 33 is arranged on an inner hole wall of the cylinder sleeve 32, an air hole 65 respectively communicated with the inner hole of the cylinder sleeve 32 and the air inlet channel is arranged on the cylinder sleeve, an annular air groove 66 is formed in the outer side wall of the cylinder sleeve 32, the air holes 65 are formed in the bottom of the annular air groove 66, and the fourth sealing rings 64 are respectively arranged at the positions of the cylinder sleeve 32 on the two sides of the annular air groove 66, so that the positions of the air holes 65 do not need to be calibrated during assembly, and the assembly speed is relatively high; in addition, a third sealing ring 63 matched with the sliding block base 35 is arranged on the side wall of the inner hole of the movable mold core 33, so that the inner core-pulling structure forms a sealing space. When the mold is opened, the injection molding machine ejects the first face needle plate 41 through an ejector rod to drive the first reset rod 27, the movable mold push plate 21 and the piston template 26 to synchronously move forwards, meanwhile, the first face needle plate 41 drives the second face needle plate 51 to move forwards together through a distance 'button type' secondary ejection mechanism of the injection molding machine to drive the second reset rod and the movable mold core plate 22 to synchronously move forwards, when the movable mold core plate 22 drives the movable mold core 33 to be separated from the slide block base 35 fixed on the supporting plate 23, the movement of the slide block base 35 can drive the inner core-pulling slide block 34 to perform core-pulling action; after finishing the core pulling action, the distance 'button machine type' secondary ejection mechanism is separated from the second face needle plate 51, so that the moving mold core plate 22 stops moving, the first face needle plate 41 continues to push the moving mold push plate 21 and the piston mold plate 26 to move forwards, the product is separated from the moving mold core 33, and the product is retained in the push plate type cavity sleeve 31 at this time; then, air is supplied to the air inlet channel, so that air flow impacts products in the cavity, vacuum adhesion of the products is eliminated, the products are pushed after the air expansion, meanwhile, the sucking discs of the mechanical arm suck the products out to complete demoulding action, the vacuum suction force or negative pressure suction force is relieved, the products are easy to demould, the demoulding action is smooth, the risk of die assembly and post-pressing die caused by adhesion of the products is avoided, and the production efficiency of the products is improved.
The present invention is described in detail with reference to the attached drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.
Claims (9)
1. An inner core-pulling injection mold comprises a movable mold push plate, a movable mold core plate and a support plate which are sequentially arranged, and is characterized in that a piston template fixedly connected with the movable mold core plate is further arranged between the movable mold push plate and the movable mold core plate, a push plate type cavity sleeve is embedded on the movable mold push plate, a cylinder sleeve is embedded on the piston template, a movable mold core sequentially inserted in the cylinder sleeve and the push plate type cavity sleeve is embedded on the movable mold core plate, a tunnel hole vertically arranged with the movable mold core is formed in the movable mold core, two inner core-pulling sliding blocks which are back to each other are slidably connected in the tunnel hole, each inner core-pulling sliding block comprises a forming part inserted in the push plate type cavity sleeve and a guide part integrally connected with the forming part and inserted in the cylinder sleeve, and inclined guide surfaces which are arranged in a splayed shape are formed on one opposite sides of the two inner core-pulling sliding blocks respectively, one side of the forming part, which is far away from the corresponding inclined guide surface, is provided with a convex edge, one side of the guide part, which is far away from the corresponding inclined guide surface, is provided with a guide surface, the supporting plate is fixedly connected with a slider base which is inserted in the movable mould core, the slider base is provided with two inclined push surfaces which are respectively matched with the inclined guide surfaces in a one-to-one manner, and the cylinder sleeve is provided with push guide surfaces which are matched with the guide surfaces in a one-to-one manner.
2. The internal core pulling injection mold according to claim 1, wherein the guide portion has a length greater than a length of the molding portion.
3. The internal core pulling injection mold according to claim 1, wherein a first reset rod is fixedly connected to the movable mold push plate, a second reset rod is fixedly connected to the movable mold core plate, and a first needle plate group matched with the first reset rod and a second needle plate group matched with the second reset rod are further arranged on one side, away from the movable mold core plate, of the supporting plate.
4. The internal core pulling injection mold according to claim 3, wherein the second pin plate group comprises a second surface pin plate and a second bottom pin plate which are fixedly connected with each other, a water transporting sleeve is fixedly connected to the second surface pin plate in a sealing manner, one end, far away from the second surface pin plate, of the water transporting sleeve penetrates through the slider base and is fixedly connected to the side wall, far away from the second surface pin plate, of the tunnel hole, a cooling hole communicated with the water transporting sleeve is formed in the side wall, far away from the second surface pin plate, of the tunnel hole, a spray pipe is fixedly connected to the second bottom pin plate and penetrates through the water transporting sleeve and the cooling hole in sequence, the outer diameter of the spray pipe is smaller than the inner diameters of the water transporting sleeve and the cooling hole, and a gap is formed between the spray pipe and the bottom of the cooling hole.
5. The internal core pulling injection mold according to any one of claims 1 to 4, wherein an air inlet channel is arranged on the piston template, a first sealing ring matched with the movable mold push plate is arranged at one end, facing the movable mold push plate, of the cylinder sleeve, the first sealing ring coats an inner orifice portion of the cylinder sleeve, a second sealing ring matched with the movable mold core is arranged on an inner hole wall of the cylinder sleeve, an air hole communicated with an inner hole of the cylinder sleeve and the air inlet channel is formed in the cylinder sleeve, and the air hole is located between the second sealing ring and the first sealing ring.
6. The internal core pulling injection mold according to claim 5, wherein a third seal ring matched with the slider base is arranged on the side wall of the inner hole of the movable mold core.
7. The internal core pulling injection mold according to claim 5, wherein an annular air groove is formed in an outer side wall of the cylinder sleeve, the air hole is formed in a groove bottom of the annular air groove, and fourth sealing rings are respectively arranged on positions of two sides of the annular air groove of the cylinder sleeve.
8. The internal core pulling injection mold according to any one of claims 1 to 4, wherein an annular water channel is formed in the outer side wall of the push plate type cavity sleeve and/or the movable mold core, and fifth sealing rings are respectively arranged on two sides of the annular water channel.
9. An inner core-pulling injection mold comprises a movable mold push plate, a movable mold core plate and a supporting plate which are sequentially arranged, and is characterized in that a piston mold plate fixedly connected with the movable mold core plate is further arranged between the movable mold push plate and the movable mold core plate, a push plate type cavity sleeve is embedded on the movable mold push plate, a movable mold core sequentially inserted in the piston mold plate and the push plate type cavity sleeve is embedded on the movable mold core plate, a tunnel hole which is perpendicular to the movable mold core is formed in the movable mold core, two inner core-pulling sliding blocks which are arranged in a back-to-back mode are connected in the tunnel hole in a sliding mode, each inner core-pulling sliding block comprises a forming part inserted in the push plate type cavity sleeve and a guide part which is integrally connected with the forming part and inserted in the cylinder sleeve, and inclined guide surfaces which are arranged in a splayed mode are respectively formed on opposite sides of the, one side of the forming part, which is far away from the corresponding inclined guide surface, is provided with a convex edge, one side of the guide part, which is far away from the corresponding inclined guide surface, is provided with a guide surface, the supporting plate is fixedly connected with a slider base which is inserted in the movable mould core, the slider base is provided with two inclined push surfaces which are respectively matched with the inclined guide surfaces in a one-to-one manner, and the piston mould plate is provided with push guide surfaces which are matched with the guide surfaces in a one-to-one manner.
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| CN202010466173.8A CN111633928A (en) | 2020-05-28 | 2020-05-28 | Internal core-pulling injection mold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010466173.8A CN111633928A (en) | 2020-05-28 | 2020-05-28 | Internal core-pulling injection mold |
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| CN111633928A true CN111633928A (en) | 2020-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622196A (en) * | 2020-12-18 | 2021-04-09 | 苏州广型模具有限公司 | First slider subassembly of loosing core that can cool off |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108908855A (en) * | 2018-06-13 | 2018-11-30 | 乌鲁木齐九品芝麻信息科技有限公司 | A kind of Shooting Technique equipment |
| CN212603147U (en) * | 2020-05-28 | 2021-02-26 | 嘉亨家化股份有限公司 | Internal core-pulling injection mold with cooling system |
| CN212603148U (en) * | 2020-05-28 | 2021-02-26 | 嘉亨家化股份有限公司 | Air-assisted ejection internal core-pulling injection mold |
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2020
- 2020-05-28 CN CN202010466173.8A patent/CN111633928A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108908855A (en) * | 2018-06-13 | 2018-11-30 | 乌鲁木齐九品芝麻信息科技有限公司 | A kind of Shooting Technique equipment |
| CN212603147U (en) * | 2020-05-28 | 2021-02-26 | 嘉亨家化股份有限公司 | Internal core-pulling injection mold with cooling system |
| CN212603148U (en) * | 2020-05-28 | 2021-02-26 | 嘉亨家化股份有限公司 | Air-assisted ejection internal core-pulling injection mold |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112622196A (en) * | 2020-12-18 | 2021-04-09 | 苏州广型模具有限公司 | First slider subassembly of loosing core that can cool off |
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