CN113145827A - Step-by-step open mode die-casting die and step-by-step open mode method - Google Patents
Step-by-step open mode die-casting die and step-by-step open mode method Download PDFInfo
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- CN113145827A CN113145827A CN202110494963.1A CN202110494963A CN113145827A CN 113145827 A CN113145827 A CN 113145827A CN 202110494963 A CN202110494963 A CN 202110494963A CN 113145827 A CN113145827 A CN 113145827A
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- 238000004512 die casting Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 7
- 230000007547 defect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/26—Mechanisms or devices for locking or opening dies
- B22D17/266—Mechanisms or devices for locking or opening dies hydraulically
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Abstract
The invention relates to the technical field of die casting molds and discloses a step-by-step open mode die casting mold and a step-by-step open mode method, wherein the die casting mold comprises a fixed mold component, a middle plate component and a movable mold component which are sequentially arranged from top to bottom; the fixed die assembly comprises a fixed die plate and a fixed die core, the middle plate assembly comprises a middle plate and a middle die core, and the movable die assembly comprises a movable die plate and a movable die core; the middle mold core and the movable mold core enclose a cavity for molding a product, a plurality of point gates are arranged at the top of the middle mold core, and a runner communicated with the point gates is arranged on the fixed mold core; the fixed die ejection device is arranged on the fixed die assembly and comprises a fixed die ejector pin, and the fixed die ejector pin is movably arranged in the flow channel in a penetrating manner; the pull block is arranged on the fixed template, and a waist groove is formed in the pull block; the pulling and supporting piece is arranged on the middle plate and is positioned in the waist groove; and the clamping mechanism is arranged on the movable template and movably clamped between the movable template and the middle plate. The die-casting die has the advantages of ingenious structure and high quality of formed products.
Description
Technical Field
The invention relates to the technical field of die-casting molds, in particular to a step-by-step die-casting mold and a step-by-step die opening method.
Background
The aluminum alloy cylindrical part belongs to a common product category in die-casting products. Most cylindric aluminum alloy spare of present stage advance the mode of watering all adopt the encapsulating, perhaps the bottom advances the mode of watering, and the die casting die structure that adopts this kind of mode of watering of advancing is simple relatively, but because the time of watering of advancing of each position of product is different, and some positions have set up the runner, and some positions do not set up the runner, lead to the uniformity of product poor, and produce local defect and local gas pocket easily. For some products with high requirements on casting quality, the pouring mode is difficult to meet the quality requirements of the products.
The application of point gate pouring in plastic mould is wider, in the die-casting industry, the metal liquid is poured, the die-casting temperature is higher than the injection temperature, so the structure of the common die-casting mould is simpler than that of the plastic mould. The point gate is poured in and can lead to the mould structure complicated, and among the plastic mold, the mode of taking off by force is many to carry out the die sinking, however, in die casting die, takes off by force and leads to the product to warp easily. Therefore, the problem of mold opening is needed to be solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a step-by-step mold opening type die-casting mold and a step-by-step mold opening method, wherein the step-by-step mold opening type die-casting mold is ingenious in structural design and high in quality of molded products.
The invention solves the technical problem and adopts the technical scheme that a step-by-step open-mode die-casting die is provided, which comprises the following steps:
the fixed die assembly, the middle plate assembly and the movable die assembly are sequentially arranged from top to bottom, the middle plate assembly is movably connected with the fixed die assembly, and the movable die assembly is movably abutted against the middle plate assembly;
the fixed die assembly comprises a fixed die plate and a fixed die core arranged on the fixed die plate, the middle plate assembly comprises a middle plate and a middle die core arranged on the middle plate, and the movable die assembly comprises a movable die plate and a movable die core arranged on the movable die plate; the fixed mold core, the middle mold core and the movable mold core are movably abutted from top to bottom in sequence, the middle mold core and the movable mold core surround a cavity for molding a product, a plurality of spot gates communicated with the cavity are arranged at the top of the middle mold core, and a runner communicated with the spot gates is arranged on the fixed mold core;
the fixed die ejection device is arranged on the fixed die assembly and comprises a plurality of fixed die ejector pins, and the fixed die ejector pins are movably arranged in the flow channel in a penetrating manner;
the pull block is arranged on the fixed die plate, and a waist groove is formed in the pull block; the pull-support piece is arranged on the middle plate and is positioned in the waist groove;
and the clamping mechanism is arranged on the movable template and movably clamped between the movable template and the middle plate.
Furthermore, a plurality of pulling blocks are symmetrically arranged on two sides of the fixed die plate, and pulling and supporting pieces which correspond to the pulling blocks one to one are arranged on the middle plate.
Further, the pulling and abutting piece is a first bolt, and the first bolt is detachably screwed on the middle plate.
Further, the clamping mechanism comprises a clamping piece, a first tensioning spring and a second bolt; the first tension spring is sleeved on the second bolt and tensioned between the clamping piece and the second bolt; the clamping piece is detachably arranged on the movable template through the second bolt and the first tensioning spring;
the middle plate is provided with a first groove, the movable template is provided with a second groove, two ends of the clamping piece are respectively provided with a first clamping block and a second clamping block, the first clamping block is movably arranged in the first groove, and the second clamping block is arranged in the second groove.
Further, the first groove is provided with a first arc-shaped surface, and the first clamping block is provided with a second arc-shaped surface; the middle plate is arranged below the first groove, and a guide inclined wall is arranged below the first groove and gradually far away from the clamping piece from top to bottom.
Further, a second tensioning spring is arranged between the middle plate and the fixed die assembly and tensioned between the middle plate and the fixed die assembly.
Furthermore, two clamping oil cylinders are symmetrically arranged on the movable template, and telescopic rods of the clamping oil cylinders sequentially penetrate through the movable template and the movable mold core and extend into the cavity;
wherein, be equipped with many wales on the terminal surface of telescopic link side by side.
Furthermore, a sprue bush mounting hole is formed in the fixed die plate, and a sprue bush is arranged in the sprue bush mounting hole; the fixed die plate is provided with a plurality of detachable positioning lugs, and the positioning lugs are arranged on two sides of the sprue bush;
the positioning lug comprises a guide part and a positioning part which are connected, and the sectional area of the guide part is gradually increased from top to bottom.
Furthermore, a first needle sleeve for the fixed mold thimble to penetrate through is arranged on the fixed mold core;
a movable mold thimble movably penetrates through the movable mold core, and a second needle sleeve for the movable mold thimble to penetrate through is arranged on the movable mold core;
the first needle sleeve, the second needle sleeve and the sprue sleeve are all sleeved with sealing rings.
The invention solves the technical problem by adopting the technical scheme that a step-by-step die opening method of the step-by-step die opening type die-casting die is also provided, is applied to the step-by-step die opening type die-casting die, and comprises the following steps:
s1, driving the movable die assembly to retreat, driving the middle plate assembly and the clamping mechanism to retreat by the movable die assembly, and sliding the abutting block along the waist groove on the pulling block; the middle plate assembly and the movable die assembly are separated from the fixed die assembly;
s2, after the movable die assembly and the middle plate assembly retreat to a preset distance, the pull and support block is positioned at the bottom of the waist groove of the pull block;
and S3, driving the movable die assembly to continuously retreat, enabling the pulling and resisting block to abut against the pulling block, driving the clamping mechanism to be separated from the middle plate, and separating the movable die assembly from the middle plate assembly.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the invention, the product formed by the die-casting die belongs to a cylindrical casting with high quality requirements, and the consistency of the quality of each part of the product cannot be ensured by adopting a traditional pouring mode or a bottom pouring mode, so that the defects of shrinkage cavity and air hole of the product are easily caused. This scheme adopts the mode of watering of advancing of top some runners, and the even some runners of cloth of circumference around the product for the quality uniformity after each position shaping of product is good, reduces the defect of gas pocket and shrinkage cavity. Adopt the mode that the top spot gate advances to water, if set up according to traditional die casting die structure, then unable normal die sinking, the product shaping back, the mold release by force can strain the product, leads to the product to warp. According to the scheme, the middle plate assembly is additionally arranged between the fixed die assembly and the movable die assembly, the clamping mechanism is arranged between the movable die plate and the middle plate, the pull block is arranged on the fixed die plate, the first bolt is arranged on the middle plate and matched with the pull block, the movable die is opened firstly after a product is formed, the middle plate assembly and the movable die assembly move downwards together under the action of the clamping mechanism and are separated from the fixed die assembly, the runner part is controlled to be opened firstly, and meanwhile, due to the arrangement of the ejector pin of the fixed die, the product is further prevented from remaining on the movable die and being prevented from deforming; when the movable die is opened to a certain distance, the first bolt slides to the bottom of the waist groove of the pull block, when the movable die continues to move downwards, the pull block limits the first bolt to move downwards so as to limit the middle plate assembly to move downwards, the movable die overcomes the clamping force of the clamping mechanism, so that the first clamping block is separated from the first groove, the clamping mechanism fails, and the movable die assembly is separated from the middle plate assembly; the product is left in the movable mould, and is ejecting smoothly through the movable mould thimble with the product, when guaranteeing product quality, enables die casting die mould die sinking smoothly, and structural design is ingenious.
According to the die-casting die, the three positioning blocks are arranged at the top of the fixed die plate and are respectively positioned at the left side, the right side and the upper side of the sprue bush to form a three-point positioning structure, so that the fixed die assembly can be smoothly matched with a die-casting machine, the positioning precision is high, the guide part is convenient to install, and the sprue bush is aligned with an injection center of the die-casting machine. Compared with a fixed positioning and clamping device, the fixed positioning and placing device has the advantages that the structure of the movable mold core or the fixed mold core can be simplified, the replacement is easy, the mold opening is simple after the product is formed, the telescopic rod of the clamping oil cylinder is directly retracted, the product cannot be additionally provided with additional packing force, and the smooth demolding of the product can be ensured; the end part of the telescopic rod of the clamping oil cylinder is provided with a plurality of convex lines, so that the clamping reliability is ensured. Be equipped with the second needle cover on the movable mould thimble, be equipped with first needle cover on the cover half thimble, and all be equipped with the sealing washer on first needle cover, second needle cover and the runner cover, because these three all communicate with the die cavity, set up the leakproofness that the die cavity is guaranteed to the sealing washer, when carrying out evacuation die-casting, can prevent that the air from getting into the die cavity, prevent that the product from producing the gas pocket.
Drawings
FIG. 1 is a schematic view of the overall structure of the die casting mold (bottom parts are omitted);
FIG. 2 is a schematic view of the structure of FIG. 1 with the oil and water lines removed;
FIG. 3 is an assembly schematic view of a fixed die assembly and fixed die ejector and puller blocks;
FIG. 4 is an assembly view of the movable mold assembly, the clamping mechanism and the clamping cylinder;
FIG. 5 is an assembly view of the movable mold assembly, the middle plate assembly, the clamping cylinder and the clamping mechanism;
FIG. 6 is a schematic structural view of the clamping mechanism;
FIG. 7 is a schematic half-section view of FIG. 6;
FIG. 8 is an exploded view of FIG. 6;
FIG. 9 is an assembled view of the clamping cylinder, the movable die assembly and the clamping mechanism;
FIG. 10 is a schematic structural view of a clamping cylinder;
FIG. 11 is a schematic structural view of a fixed mold thimble, a first needle guard, a movable mold thimble, and a second needle guard;
FIG. 12 is a schematic view of a step-and-die opening method.
In the figure:
1. a stationary die assembly; 10. fixing a template; 11. fixing a mold core; 101. a sprue bush mounting hole; 102. positioning the bump; 1021. a guide portion; 1022. a positioning part; 110. a flow channel; 12. a first sleeve; 100. a cavity; 120. a second tension spring;
2. a middle plate assembly; 20. a middle plate; 21. a middle mold core; 201. a first groove; 202. a guide inclined wall; 210. dotting a gate;
3. a movable die assembly; 30. moving the template; 31. a movable mold core; 301. a second groove; 310. a movable mold thimble; 311. a second sleeve;
4. ejecting out the fixed die; 40. a fixed die thimble;
5. pulling the block; 50. a waist groove;
6. pulling and propping pieces;
7. a clamping mechanism; 70. a clamping member; 71. a first tension spring; 72. a second bolt; 73. a shield; 701. a first clamping block; 702. a second clamping block;
8. clamping the oil cylinder; 80. a telescopic rod; 801. and (4) ribs.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 to 11, a step-by-step open-type die casting mold includes: the fixed die component 1, the middle plate component 2 and the movable die component 3 are sequentially arranged from top to bottom, the middle plate component 2 is movably connected with the fixed die component 1, and the movable die component 3 is movably abutted against the middle plate component 2; the fixed die assembly 1 comprises a fixed die plate 10 and a fixed die core 11 arranged on the fixed die plate 10, the middle plate assembly 2 comprises a middle plate 20 and a middle die core 21 arranged on the middle plate 20, and the movable die assembly 3 comprises a movable die plate 30 and a movable die core 31 arranged on the movable die plate 30; wherein, the fixed mold core 11 is detachably embedded in the fixed mold plate 10, the middle mold core 21 is detachably embedded in the middle plate 20, the movable mold core 31 is detachably embedded in the movable mold plate 30, generally speaking, the fixed mold core 11, the movable mold core 31 and the middle mold core 21 are made of metal materials with high temperature resistance and high fatigue strength, and because the metal materials need to be in direct contact with molten metal, the fixed mold plate 10, the movable mold plate 30 and the middle plate 20 which do not need to be in direct contact with the molten metal can be made of metal materials with relatively low price, so that the service life of the mold is ensured, and the cost of the mold is reduced. The fixed mold core 11, the middle mold core 21 and the movable mold core 31 are sequentially and movably abutted from top to bottom, the middle mold core 21 and the movable mold core 31 surround a cavity 100 for forming a product, the top of the middle mold core 21 is provided with a plurality of point gates 210 communicated with the cavity 100, and the fixed mold core 11 is provided with a flow channel 110 communicated with the point gates 210; specifically, the fashioned product of this die casting die belongs to the tube-shape foundry goods that has the high quality requirement, adopts traditional pouring mode or bottom to advance to water the mode, can't guarantee the uniformity of each position quality of product, the defect of easy product shrinkage cavity, gas pocket, and this scheme adopts the mode of watering of advancing of top point runner 210, and the circumference of winding the product is the even some runner 210 of cloth for the quality uniformity after each position shaping of product is good, reduces the defect of gas pocket and shrinkage cavity.
The fixed die ejection 4 is arranged on the fixed die assembly 1 and comprises a plurality of fixed die ejector pins 40, and the fixed die ejector pins 40 are movably arranged in the runner 110 in a penetrating manner; the fixed mold ejection 4 ensures that the metal at the runner and the sprue 210 can be left on the middle plate assembly 2 after molding and can not be left on the fixed mold assembly 1 because the fixed mold assembly 1 does not move during the mold opening process. The drawing block 5 is arranged on the fixed die plate 10, and the drawing block 5 is provided with a waist groove 50; the pulling-resisting piece 6 is arranged on the middle plate 20 and is positioned in the waist groove 50; and a clamping mechanism 7 which is arranged on the movable die plate 30 and is movably clamped between the movable die plate 30 and the middle plate 20.
Specifically, as shown in fig. 2, fig. 3 and fig. 9, a plurality of pulling blocks 5 are symmetrically arranged on two sides of the fixed die plate 10, pulling and supporting members 6 corresponding to the pulling blocks 5 one to one are arranged on the middle plate 20, specifically, two pulling blocks 5 are respectively arranged on two sides of the fixed die plate 10, and two pulling and supporting members 6 are respectively arranged on two sides of the middle plate 20, so as to ensure the stress balance during pulling. The pulling-resisting part 6 is a first bolt, the first bolt is detachably screwed on the middle plate 20, and the bolt is used, so that the dismounting and the mounting are simple, and the cost is low.
As shown in fig. 5 to 8, the clamping mechanism 7 includes a clamping member 70, a first tension spring 71, a second bolt 72, and a shield 73; the first tensioning spring 71 is sleeved on the second bolt 72 and tensioned between the clamping piece 70 and the second bolt 72, when the middle plate assembly 2 and the movable die assembly 3 are separated, the elastic force of the first tensioning spring 71 needs to be overcome, and the first tensioning spring 71 ensures that the middle plate assembly 2 and the movable die assembly 3 move cooperatively at the initial stage of die opening; the clamping member 70 is detachably mounted on the movable platen 30 by the second bolt 72 and the first tension spring 71; the middle plate 20 is provided with a first groove 201, the movable mold plate 30 is provided with a second groove 301, two ends of the clamping piece 70 are respectively provided with a first clamping block 701 and a second clamping block 702, the first clamping block 701 is movably arranged in the first groove 201, and the second clamping block 702 is arranged in the second groove 301. Specifically, the first groove 201 has a first arc-shaped surface, and the first clamping block 701 has a second arc-shaped surface; the middle plate 20 is provided with a guide inclined wall 202 below the first groove 201, and the guide inclined wall 202 is gradually far away from the clamping member 70 from top to bottom.
In the use process, the arrangement of the first arc-shaped surface, the arrangement of the second arc-shaped surface and the arrangement of the guide inclined wall 202 are both convenient for separating the first clamping block 701 from the first groove 201 during mold opening and convenient for clamping the first clamping block 701 into the first groove 201 during mold closing.
Preferably, a second tensioning spring 120 is arranged between the middle plate 20 and the fixed die assembly 1, and the second tensioning spring 120 is tensioned between the middle plate 20 and the fixed die assembly 1. That is, when in the mold clamping state, the second tension spring 120 is in a compressed state, and after the mold is opened, the elastic force acts between the fixed mold assembly 1 and the middle plate assembly 2, facilitating the separation of the two.
In the in-service use process, adopt top spot gate 210 to advance the mode of watering, if set up according to traditional die casting die structure, then unable normal die sinking, after the product shaping, the mold release by force can strain the product, leads to the product to warp. According to the scheme, the middle plate component 2 is additionally arranged between the fixed die component 1 and the movable die component 3, the clamping mechanism 7 is arranged between the movable die plate 30 and the middle plate 20, the pull block 5 is arranged on the fixed die plate 10, the first bolt is arranged on the middle plate 20 and is matched with the pull block 5, after a product is formed, the movable die is opened firstly, due to the action of the clamping mechanism, the middle plate component 2 and the movable die component 3 move downwards together and are separated from the fixed die component 1, the control runner 110 is opened firstly, and meanwhile due to the arrangement of the fixed die ejector pin 40, the product is further prevented from remaining on the movable die, and the product is prevented from deforming; after the movable die is opened to a certain distance, the first bolt slides to the bottom of the waist groove 50 of the pull block 5, when the movable die continues to move downwards, the pull block 5 limits the first bolt to move downwards so as to limit the middle plate assembly 2 to move downwards, the movable die overcomes the clamping force of the clamping mechanism 7, so that the first clamping block 701 is separated from the first groove 201, the clamping mechanism 7 is invalid, and the movable die assembly 3 is separated from the middle plate assembly 2; the product is left in the movable mold, and is ejected out smoothly through the movable mold ejector pin 310, so that the die-casting mold can be opened smoothly while the product quality is ensured, and the structural design is ingenious.
Preferably, as shown in fig. 2, a sprue bush mounting hole 101 is formed in the fixed die plate 10, and a sprue bush is arranged in the sprue bush mounting hole 101; a plurality of detachable positioning lugs 102 are arranged on the fixed die plate 10, and the positioning lugs 102 are arranged on two sides of the sprue bush; the positioning protrusion 102 includes a guiding portion 1021 and a positioning portion 1022 connected to each other, and a cross-sectional area of the guiding portion 1021 is gradually increased from top to bottom.
In the use, the top of fixed die plate 10 is equipped with three locating piece, is in the left and right sides and the top of runner cover respectively, forms three point location structure, guarantees that cover half subassembly 1 can match smoothly with the die casting machine, and positioning accuracy is high, and the guide part 1021 sets up easy to assemble, guarantees that the injection center of runner cover and die casting machine aims at.
As shown in fig. 9 and 10, two clamping cylinders 8 are symmetrically arranged on the movable mold plate 30, and the telescopic rods 80 of the clamping cylinders 8 sequentially penetrate through the movable mold plate 30 and the movable mold core 31 and extend into the cavity 100; wherein, a plurality of wales 801 are arranged on the end surface of the telescopic rod 80 side by side.
In the practical use process, the clamping oil cylinders 8 are arranged on the two sides of the movable die assembly 3 and are used for clamping and positioning the insert, compared with a fixed positioning and clamping device, the fixed and positioned placement can simplify the structure of the movable die core 31 or the fixed die core 11, the fixed and positioned placement is easy to replace, when a product is formed, the die opening is simple, the telescopic rod 80 for clamping the oil cylinders is directly retracted, no additional wrapping force is added to the product, and the product can be smoothly demoulded; the end part of the telescopic rod 80 of the clamping oil cylinder 8 is provided with a plurality of convex lines 801, so that the clamping is reliable.
As shown in fig. 3 and 11, a first needle sleeve 12 for the fixed mold thimble 40 to pass through is arranged on the fixed mold core 11; a movable mold thimble 310 is movably arranged in the movable mold core 31 in a penetrating manner, and a second needle sleeve 311 for the movable mold thimble 310 to penetrate is arranged on the movable mold core 31; the first needle sleeve 12, the second needle sleeve 311 and the sprue sleeve are all sleeved with sealing rings.
In the actual use process, be equipped with second needle cover 311 on movable mould thimble 310, be equipped with first needle cover 12 on the cover half thimble 40, and first needle cover 12, second needle cover 311 and runner are sheathe in and all are equipped with the sealing washer, because these three all communicate with die cavity 100, set up the leakproofness that the sealing washer guarantees die cavity 100, when carrying out evacuation die-casting, can prevent that the air from getting into die cavity 100 in, prevent that the product from producing the gas pocket defect.
As shown in fig. 12, the step-by-step mold opening method of the die-casting mold mainly comprises three steps:
s1, driving the movable die assembly 3 to retreat, driving the middle plate assembly 2 and the clamping mechanism 7 to retreat by the movable die assembly 3, and sliding the pull-support block along the waist groove 50 on the pull block 5; the middle plate assembly 2 and the movable die assembly 3 are both separated from the fixed die assembly 1;
s2, after the movable mold component 3 and the middle plate component 2 retreat to a preset distance, the pull and support block is positioned at the bottom of the waist groove 50 of the pull block 5;
and S3, driving the movable mold assembly 3 to continuously retreat, enabling the pulling and supporting block to abut against the pulling block 5, driving the clamping mechanism 7 to be separated from the middle plate 20, and separating the movable mold assembly 3 from the middle plate assembly 2.
In this scheme, this die casting die's structure is ingenious, and shaping product quality is high.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a step by step open mode die casting die which characterized in that, including:
the fixed die assembly, the middle plate assembly and the movable die assembly are sequentially arranged from top to bottom, the middle plate assembly is movably connected with the fixed die assembly, and the movable die assembly is movably abutted against the middle plate assembly;
the fixed die assembly comprises a fixed die plate and a fixed die core arranged on the fixed die plate, the middle plate assembly comprises a middle plate and a middle die core arranged on the middle plate, and the movable die assembly comprises a movable die plate and a movable die core arranged on the movable die plate; the fixed mold core, the middle mold core and the movable mold core are movably abutted from top to bottom in sequence, the middle mold core and the movable mold core surround a cavity for molding a product, a plurality of spot gates communicated with the cavity are arranged at the top of the middle mold core, and a runner communicated with the spot gates is arranged on the fixed mold core;
the fixed die ejection device is arranged on the fixed die assembly and comprises a plurality of fixed die ejector pins, and the fixed die ejector pins are movably arranged in the flow channel in a penetrating manner;
the pull block is arranged on the fixed die plate, and a waist groove is formed in the pull block; the pull-support piece is arranged on the middle plate and is positioned in the waist groove;
and the clamping mechanism is arranged on the movable template and movably clamped between the movable template and the middle plate.
2. The step-by-step die-casting die as claimed in claim 1, wherein a plurality of the pulling blocks are symmetrically arranged on both sides of the fixed die plate, and the middle plate is provided with pulling and supporting members corresponding to the pulling blocks one to one.
3. The step-separated die-casting die as claimed in claim 2, wherein the pull-and-hold member is a first bolt detachably screwed to the middle plate.
4. The step-open die casting mold as claimed in claim 1, wherein the clamping mechanism comprises a clamping member, a first tension spring and a second bolt; the first tension spring is sleeved on the second bolt and tensioned between the clamping piece and the second bolt; the clamping piece is detachably arranged on the movable template through the second bolt and the first tensioning spring;
the middle plate is provided with a first groove, the movable template is provided with a second groove, two ends of the clamping piece are respectively provided with a first clamping block and a second clamping block, the first clamping block is movably arranged in the first groove, and the second clamping block is arranged in the second groove.
5. The step-split die casting mold as claimed in claim 4, wherein the first recess has a first arcuate surface and the first clamping block has a second arcuate surface; the middle plate is arranged below the first groove, and a guide inclined wall is arranged below the first groove and gradually far away from the clamping piece from top to bottom.
6. The die casting mold as claimed in any one of claims 1 to 5, wherein a second tension spring is provided between the middle plate and the fixed die assembly, the second tension spring being tensioned between the middle plate and the fixed die assembly.
7. The step-by-step open-mode die-casting die as claimed in claim 1, wherein the movable die plate is provided with two symmetrically arranged clamping cylinders, and telescopic rods of the clamping cylinders sequentially penetrate through the movable die plate and the movable die core and extend into the die cavity;
wherein, be equipped with many wales on the terminal surface of telescopic link side by side.
8. The step-by-step open-mode die-casting die as claimed in claim 1, wherein the fixed die plate is provided with a sprue bush mounting hole, and a sprue bush is arranged in the sprue bush mounting hole; the fixed die plate is provided with a plurality of detachable positioning lugs, and the positioning lugs are arranged on two sides of the sprue bush;
the positioning lug comprises a guide part and a positioning part which are connected, and the sectional area of the guide part is gradually increased from top to bottom.
9. The step-by-step open-mode die-casting die as claimed in claim 8, wherein a first needle sleeve through which the fixed die ejector pin passes is provided on the fixed die core;
a movable mold thimble movably penetrates through the movable mold core, and a second needle sleeve for the movable mold thimble to penetrate through is arranged on the movable mold core;
the first needle sleeve, the second needle sleeve and the sprue sleeve are all sleeved with sealing rings.
10. A step-by-step mold opening method of a step-by-step open-mode die casting mold, applied to the step-by-step open-mode die casting mold as claimed in any one of claims 1 to 9, characterized by comprising the steps of:
s1, driving the movable die assembly to retreat, driving the middle plate assembly and the clamping mechanism to retreat by the movable die assembly, and sliding the abutting block along the waist groove on the pulling block; the middle plate assembly and the movable die assembly are separated from the fixed die assembly;
s2, after the movable die assembly and the middle plate assembly retreat to a preset distance, the pull and support block is positioned at the bottom of the waist groove of the pull block;
and S3, driving the movable die assembly to continuously retreat, enabling the pulling and resisting block to abut against the pulling block, driving the clamping mechanism to be separated from the middle plate, and separating the movable die assembly from the middle plate assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110494963.1A CN113145827A (en) | 2021-05-07 | 2021-05-07 | Step-by-step open mode die-casting die and step-by-step open mode method |
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| CN202110494963.1A CN113145827A (en) | 2021-05-07 | 2021-05-07 | Step-by-step open mode die-casting die and step-by-step open mode method |
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| CN113145827A true CN113145827A (en) | 2021-07-23 |
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| CN202110494963.1A Pending CN113145827A (en) | 2021-05-07 | 2021-05-07 | Step-by-step open mode die-casting die and step-by-step open mode method |
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