CN114407299B - Forming die of many draw-in grooves work piece - Google Patents
Forming die of many draw-in grooves work piece Download PDFInfo
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- CN114407299B CN114407299B CN202210216778.0A CN202210216778A CN114407299B CN 114407299 B CN114407299 B CN 114407299B CN 202210216778 A CN202210216778 A CN 202210216778A CN 114407299 B CN114407299 B CN 114407299B
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- 230000009471 action Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 39
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 17
- 238000001746 injection moulding Methods 0.000 description 15
- 238000012545 processing Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- B29C45/332—Mountings or guides therefor; Drives therefor
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The application discloses a forming die for a multi-clamping-groove workpiece, which comprises a fixed die and a movable die, wherein a first demolding assembly is arranged on the fixed die and comprises a first sliding block, a second sliding block and a third sliding block; the fixed die is provided with a second demolding assembly, and the second demolding assembly is suitable for forming a second clamping groove of the workpiece; when the mold is in the mold closing state, the third sliding block is abutted against the first clamping groove, and the second demolding assembly is abutted against the second clamping groove; when the mold is in the mold opening state, the third sliding block is separated from the first clamping groove, and the second demolding assembly is separated from the second clamping groove; an included angle gamma is formed between the demolding direction of the first clamping groove and the mold opening direction of the movable mold, wherein gamma is more than 0 degrees and less than 90 degrees. The die can reduce the production cost and the production period.
Description
Technical Field
The application relates to the field of dies, in particular to a forming die for a multi-clamping-groove workpiece.
Background
At present, a plastic mold is often matched with an injection molding machine for use so as to produce different products, in the field of automobile parts, as the appearance of the plastic product is basically not limited by a processing technology, and the quality of the plastic product is better, the trend of plastic steel substitution is more and more obvious, and particularly for some products with complex shapes, iron materials are used for production by utilizing a processing center, the efficiency is lower, the cost is higher, and therefore, the plastic product is generally adopted for substitution.
However, for some multi-slot plastic products, especially products with different slot angles and die opening and closing angles, the high production cost is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide a forming die for a multi-clamping-groove workpiece, which is compact in structure, small in size and low in cost.
Another object of the present application is to provide a first stripper assembly for a forming die for a multi-slot workpiece that is compact, small, and low cost.
In order to achieve the above purpose, the application adopts the following technical scheme:
The forming die for the multi-clamping-groove workpiece comprises a fixed die and a movable die, and is characterized in that a first demolding assembly is arranged on the fixed die and comprises a first sliding block, a second sliding block and a third sliding block, wherein the first sliding block is fixedly connected to the fixed die, the second sliding block is slidably connected to the first sliding block, the third sliding block is slidably connected to the second sliding block, and the third sliding block is suitable for forming a first clamping groove of the workpiece; the fixed die is provided with a second demolding assembly, and the second demolding assembly is suitable for forming a second clamping groove of the workpiece;
When the mold is in the mold closing state, the third sliding block is abutted against the first clamping groove, and the second demolding assembly is abutted against the second clamping groove; when the mold is in the mold opening state, the third sliding block is separated from the first clamping groove, and the second demolding assembly is separated from the second clamping groove; an included angle gamma is formed between the demolding direction of the first clamping groove and the mold opening direction of the movable mold, wherein gamma is more than 0 degrees and less than 90 degrees; and the demolding direction of the second clamping groove is the same as the mold opening direction of the movable mold.
The traditional plastic mold aims at multiple clamping grooves, particularly plastic molds with different clamping groove directions, the mold design thought is to take the deepest clamping groove as a first clamping groove, the demolding direction of the first clamping groove is kept consistent with the demolding direction of the mold, then inclined guide posts, inclined sliding blocks and the like are sequentially designed for second clamping grooves in different directions, so that the condition that hard demolding cannot occur at the clamping groove positions in the mold opening process of the mold is ensured, and therefore the precision and the attractiveness of the product surface are reduced.
However, in the actual production process, the first clamping groove is deeper for some products, and the product itself is longer, so that the mold design thought that the demolding direction of the first clamping groove is consistent with the mold opening direction of the mold can lead to the excessive thickness of the mold, and in order to reduce the thickness of the mold, the direction sliding block is additionally arranged, because the demolding direction of the first clamping groove is consistent with the mold opening direction of the mold at the beginning of the design, the volume of the direction sliding block is also excessive even if the direction sliding block is additionally arranged, thereby increasing the height of the mold.
For some one-out-two molds developed for increased throughput, too high a mold height will further increase the volume of the mold, resulting in a substantial increase in the overall volume of the mold, and thus, during the production process, more mold material has to be used to make the mold, and a larger injection molding machine has to be used to produce such larger molds.
According to the multi-clamping-groove die, the demolding direction of the first clamping groove and the die opening direction of the die are staggered to form a gamma angle, wherein gamma is smaller than 90 degrees and is larger than 0 degrees, so that the problem that the die is too thick due to the fact that the depth of the first clamping groove is deeper can be effectively solved; the demolding direction of the second clamping groove is kept as consistent as possible with the mold opening direction of the mold, so that more inclined sliding blocks or directional sliding blocks can be reduced, demolding can be completed only by using the core blocks, most of the second clamping grooves can be smoothly demolded in the mold opening process, and hard demolding is prevented; it should be noted that the first demolding assembly adopted by the application uses the first slide block, the second slide block and the third slide block to be matched, wherein the first slide block is slidably connected with the second slide block, the second slide block is slidably connected with the third slide block, and the demolding moving distance of the deeper clamping groove can be respectively decomposed into the movement along the first slide block, the movement along the second slide block and the movement along the mold opening direction, so that not only the thickness of the mold is reduced, but also the width and the thickness of the mold are reduced, and the material cost of the whole mold is reduced.
The multi-clamping groove die has low cost, which is reflected in the lower material cost of the die and the smaller die, and the processing cost of the die is also reduced; in addition, in the actual production process, the model of the selected injection molding machine is smaller, the purchasing cost of the injection molding machine is reduced, and more importantly, the time for opening and closing the smaller mold is reduced, so that the period is also reduced, and the production cost is reduced.
Further preferably, the second sliding block is provided with a first sliding groove and a second sliding groove, the first sliding block is slidably connected with the second sliding block through the first sliding groove, the third sliding block is slidably connected with the second sliding block through the second sliding groove, the second sliding groove is provided with a second sliding groove contact surface, the second sliding groove contact surface is in contact with the third sliding block, and the demolding surface of the first clamping groove is perpendicular to the second sliding groove contact surface.
Considering production cost and processing difficulty, the first sliding groove and the second sliding groove are arranged on the second sliding block, so that the processing difficulty of the second sliding block can be reduced, the production of the second sliding block is more consistent, if a bulge is arranged on one surface of the second sliding block, the sliding grooves are arranged on the other surface of the second sliding block, and the processing modes on two sides are different, so that unnecessary production cost is increased; and because the third sliding block is contacted with the first clamping groove, the third sliding block is required to be in deep contact with the mold core, the mold core is also required to be provided with a through hole for the third sliding block to pass through, the diameter of the through hole is reduced as far as possible in the allowable range of conditions, the integrity of the mold core can be effectively improved, the occurrence of stress concentration, namely cracking and other problems in the use process is prevented, therefore, the volume of the third sliding block is required to be reduced, compared with the second sliding groove arranged on the third sliding block, the volume of the third sliding block is larger, the processing is more difficult, and the second sliding groove is arranged on the second sliding block, so that the volume of the third sliding block can be reduced.
The demolding surface of the first clamping groove is perpendicular to the contact surface of the second sliding groove, so that the demolding distance is longest under the condition that the demolding travel is consistent, the moving distance of the third sliding block along the second sliding block is shortest, the die volume is effectively reduced, and the purposes of reducing cost and increasing profit are achieved.
Preferably, the first sliding block is provided with a first sliding block contact surface, the first sliding block contact surface is in contact with the first sliding groove, and the first sliding block contact surface and the second sliding groove contact surface are perpendicular to the outer side surface of the first sliding block.
The first sliding block contact surface and the second sliding groove contact surface are perpendicular to the outer side surface of the first sliding block, and the second sliding block is driven to move by the third sliding block in the mold opening process due to the fact that the movement of the third sliding block is caused along with the mold opening action of the movable mold, so that demolding action is realized, the fact that the second sliding groove contact surface and the first sliding block contact surface are kept perpendicular to the outer side surface of the first sliding block is guaranteed, and the fact that the second sliding block is clamped due to self gravity and friction force in the sliding process of the second sliding block can be reduced; and secondly, the moving distance of the second sliding block along the first sliding block in the die opening process can be reduced, so that the effect of reducing the die volume is achieved.
Further preferably, the first sliding block contact surface and the bottom surface of the first sliding block form an included angle α, the second sliding groove contact surface and the first sliding block contact surface form an included angle β, the demolding moving distance is D1, the mold opening moving distance is D2, d2=d1×cos γ is satisfied, during mold opening operation, the distance that the second sliding block moves along the first sliding block contact surface is D3, d3=d2/sin β is satisfied, the distance that the second sliding block moves along the mold opening direction is D4, d4=d3cos α is satisfied, and the sum of the included angle α and the included angle β is not greater than 90 °.
The relation between the demolding moving distance D1 and the demolding moving distance D2 is a function D2=D1, cos gamma, the distance D3=D2/sin beta of the second sliding block moving along the contact surface of the first sliding block, the distance D4=D3cos alpha of the second sliding block moving along the demolding direction can be obtained, the linear relation of D1, D2, D3 and D4 can be kept, the linear increase of the demolding moving distance along with the linear increase of the demolding moving distance in the demolding process can be ensured, the negligence of the demolding process can not occur, and the problem of scratching the surface of the first clamping groove can be caused; the sum of the included angle alpha and the included angle beta is not larger than 90 degrees, so that the contact surface of the second sliding groove and the bottom surface of the first sliding block can be ensured to form an acute angle, and the third sliding block is prevented from deflecting towards the direction of the first sliding block, so that the interference between the third sliding block and the first sliding block is caused, the volume of the third sliding block and the volume of the first sliding block are further increased for avoiding the interference of the die, and the purpose of reducing the volume of the die cannot be achieved.
In another preferred embodiment, the angle α is greater than the angle β.
From principle analysis, the size of contained angle alpha and contained angle beta does not influence the demolding movement distance D1 to decompose and be the distance D4 that the second slider moved along the first slider contact surface movement distance D3 and the second slider moved along the die sinking direction, but in actual production's in-process, contained angle alpha is greater than contained angle beta, can decompose the demolding movement distance D1 into the length width height all directions of mould simultaneously, avoids the mould to be too big at certain size and leads to the too big injection molding machine model of mould to use.
Further preferably, the angle α is not greater than 45 °.
Considering that the die opening distance D2 can be decomposed into a distance moving along the contact surface of the second sliding groove and a distance D3 moving along the contact surface of the first sliding block, if the included angle α is too small, the distance D4 moving along the die opening direction of the second sliding block becomes larger under the condition that the included angle β and the included angle γ remain unchanged, so that the die volume is increased, and therefore, the included angle α is made as large as possible within the allowable range of conditions; however, in the actual production process, the too large included angle α may cause the too large moving distance perpendicular to the mold opening direction, thereby increasing the height of the mold, and thus, the included angle α is not more than 45 ° in comprehensive consideration.
Further preferably, a third protrusion is arranged on the third slider, the third slider is slidably connected with the second chute through the third protrusion, and the outer side surface of the third protrusion is parallel to the demolding surface of the first clamping groove.
It should be noted that, although the required demoulding action can be completed even though the outer side surface of the third bulge is not parallel to the demoulding surface of the first clamping groove, the difficulty and the processing cost of production are considered, the milling cutter angle is additionally replaced when the machining is needed due to the non-parallelism, the additional cost is increased, the outer side surface of the third bulge and the demoulding surface of the first clamping groove are ensured to be parallel, the milling cutter can be machined and formed at one time, and the machining cost and time are reduced.
Preferably, the movable mold is provided with a first demolding resetting component, a resetting part is convexly arranged on the first demolding resetting component, the resetting part is contacted with the second sliding block during mold closing action, and the resetting part is suitable for pushing the second sliding block to reset.
The reset mode of the first demoulding assembly is two, and under the condition that the first demoulding reset assembly is not used, the fixed mould can be reset along the reverse direction of the demoulding direction, but in actual production, the reset part is additionally arranged, so that the reset part pushes the second slide block to reset, the mould closing speed in the production process can be increased, and the second slide block is prevented from being separated due to the fact that the mould closing speed is too high.
Further preferably, the first demolding assembly is fixedly connected with a limiting assembly, and the limiting assembly is suitable for limiting the second sliding block to slide left and right; the second sliding block is provided with a second limiting block, when the second sliding block is at the closing end point, the second limiting block is in contact with the limiting component, and the second limiting block is suitable for limiting the maximum moving distance of the second sliding block.
Further preferably, a wear-resistant block is arranged on the contact surface of the first sliding block, and the wear-resistant block is suitable for reducing the wear of the first sliding block and the second sliding block; the limiting assembly is provided with a quick-release hole, and the quick-release hole is suitable for replacing the third sliding block.
It is worth mentioning that wear-resisting blocks need to be additionally arranged on the contact surface of the first sliding block, but wear-resisting blocks cannot be additionally arranged on the contact surface of the second sliding groove, because the third sliding block needs to keep the sliding distance and the sliding speed on the contact surface of the second sliding groove to be not too high by means of friction force, and a part of gravity needs to be counteracted by means of friction force to prevent the third sliding block from naturally sliding off after the die sinking, quick-release holes need to be formed in the limiting assembly, after the third sliding block is worn, the third sliding block can be conveniently slid, the functions of lowest maintenance cost and best maintenance effect are achieved.
Compared with the prior art, the application has the beneficial effects that:
(1) The first clamping groove inconsistent with the mold opening direction is ensured to be smoothly demolded by using the first sliding block, the second sliding block and the third sliding block, and the demolding distance is decomposed into the moving distance along the second sliding block and the first sliding block, so that the length, width and height of the mold are increased uniformly, and the oversize of a certain part of the mold is prevented, and the oversize of an injection molding machine required for producing the mold is avoided;
(2) The multi-clamping-groove die can relatively reduce the length, width and height of the die at the same time, so that the overall size of the die is uniformly increased, the increasing amplitude is kept to be minimum, in actual production, the strip-shaped die is easier to generate flash, burrs and the like, the dies with consistent length, width and height are difficult to generate flash, and the size of the die is reduced, so that the die cost is reasonably reduced, and the production cost (including the use cost and the production period of an injection molding machine) is also reduced.
Drawings
FIG. 1 is a schematic view of a workpiece showing the structure of the workpiece according to an embodiment of the application;
FIG. 2 is a schematic view of one embodiment of the mold of the present application, showing the overall structure and location of the mold;
FIG. 3 is a schematic view of one embodiment of a movable mold of the present application showing the position and configuration of the first stripper reset assembly and reset portion;
FIG. 4 is a schematic view of one embodiment of a stationary mold of the present application, showing the various components of the stationary mold;
FIG. 5 is another perspective view of one embodiment of a stationary mold of the present application showing the mounting location and configuration of the first stripper unit;
FIG. 6 is a schematic view of one embodiment of the die of the present application showing the first stripper assembly contacting a workpiece through the die core;
FIG. 7 is a schematic view of a first stripper assembly of an embodiment of the mold of the present application, showing the first stripper assembly in a clamped condition;
FIG. 8 is a schematic view of a first stripper assembly of an embodiment of the mold of the present application, showing the first stripper assembly in an open mold state;
FIG. 9 is a front view of a first stripper assembly of one embodiment of the inventive die showing included angle α, included angle β and included angle γ;
FIG. 10 is another perspective view of the first stripper assembly of one embodiment of the mold of the present application showing the location of the third lobe outer side and the second runner contact surface;
FIG. 11 is a right side view of a first stripper assembly of one embodiment of the inventive die showing a stop assembly and quick release holes;
FIG. 12 is a schematic view of a second slide of an embodiment of the inventive die showing the positions of the first runner and the second runner.
In the figure:
1. A fixed mold; 10. a first stripper assembly; 11. a first slider; 111. a first slider contact surface; 1111. a wear block; 112. the outer side surface of the first sliding block; 113. the bottom surface of the first sliding block; 12. a second slider; 121. a first chute; 122. a second chute; 1221. the second chute contact surface; 123. a second limiting block; 13. a third slider; 131. a third protrusion; 1311. the outer side surface of the third bulge; 132. the outer side surface of the third sliding block; 14. a limit component; 141. a quick-release hole; 15. a second stripper assembly;
2. A movable mold; 21. a first stripper reset assembly; 211. a reset section;
3. a workpiece; 31. a first clamping groove; 311. a demolding surface; 32. a second clamping groove;
4. A die table;
5. And (5) a mold core.
Detailed Description
The present application will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation.
It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The terms "comprises" and "comprising," along with any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The traditional plastic mold aims at multiple clamping grooves, particularly plastic molds with different clamping groove directions, the mold design thought is to take the deepest clamping groove as a first clamping groove, the demolding direction of the first clamping groove is kept consistent with the demolding direction of the mold, then inclined guide posts, inclined sliding blocks and the like are sequentially designed for second clamping grooves in different directions, so that the condition that hard demolding cannot occur at the clamping groove positions in the mold opening process of the mold is ensured, and therefore the precision and the attractiveness of the product surface are reduced.
As shown in fig. 1, a multi-slot workpiece 3 is a safety belt buckle, the workpiece 3 has a longer length and more slots, one slot has a deeper depth and a longer length, the slot with the deeper depth is taken as a first slot 31, the other slots are taken as second slots 32, the second slots 32 have various different directions and depths, so different demolding modes are selected, the directions of the first slot 31 and the second slot 32 are different, the conventional mold design generally takes the demolding direction of the first slot 31 as the mold opening direction, and the second slot 32 finishes demolding through an oblique guide post or an oblique sliding block.
However, in the actual production process, for some products, such as a safety belt buckle, as shown in fig. 1, the first clamping groove 31 is deeper, and the product itself is longer, so that the mold design thought that the demolding direction of the first clamping groove 31 is consistent with the mold opening direction of the mold can cause the thickness of the mold to be too large, and in order to reduce the thickness of the mold, a direction sliding block is additionally arranged, and even if the direction sliding block is additionally arranged, the volume of the direction sliding block is too large, so that the height of the mold is increased, the overall mold size is larger, and a larger injection molding machine has to be used.
For some one-out-two molds developed for improving productivity, too high a mold height will further increase the volume of the mold, so that the overall volume of the mold is greatly increased, and thus more mold material has to be used to manufacture the mold during the production process, and a larger injection molding machine has to be used to produce such larger molds.
Accordingly, the inventors developed a low cost multi-slot mold, one embodiment of which is shown in fig. 2 to 12, comprising a fixed mold 1 and a movable mold 2, wherein the fixed mold 1 is provided with a first stripping assembly 10, the first stripping assembly 10 is fixed on a mold table 4, the first stripping assembly 10 comprises a first slide 11, a second slide 12 and a third slide 13, the first slide 11 is fixedly connected to the fixed mold 1, the second slide 12 is slidably connected to the first slide 11, the third slide 13 is slidably connected to the second slide 12, and the third slide 13 is adapted to form a first slot 31 on a workpiece 3; the fixed die 1 is provided with a second demoulding assembly 15, and the second demoulding assembly 15 is suitable for forming a second clamping groove 32 of the workpiece 3; when the mold is closed, the third sliding block 13 is in contact with the first clamping groove 31 on the workpiece 3, and the second demolding assembly 15 is abutted against the second clamping groove 32; when the mold is opened, the third slide block 13 is separated from the first clamping groove 31, and the second demolding assembly 15 is separated from the second clamping groove 32; an included angle gamma is formed between the demolding direction of the first clamping groove 31 and the mold opening direction of the movable mold 2, wherein gamma is more than 0 degrees and less than 90 degrees; the demolding direction of the second clamping groove 32 on the workpiece 3 is the same as the demolding direction of the movable mold 2.
According to the multi-clamping-groove die disclosed by the application, as shown in fig. 3 to 6, the demolding direction of the first clamping groove 31 and the die opening direction of the movable die 2 are staggered and kept at 0 degrees less than gamma less than 90 degrees, so that the problem that the thickness of the die is too thick due to the fact that the thickness of the first clamping groove 31 is deeper can be effectively reduced; and the demolding direction of the second clamping groove 32 is kept as consistent as possible with the mold opening direction of the mold, so that more inclined sliding blocks or directional sliding blocks can be reduced, most of the second clamping groove 32 can be smoothly demolded in the mold opening process, and the hard demolding is prevented; it should be noted that the first demolding assembly 10 adopted by the present application uses the first slider 11, the second slider 12 and the third slider 13 to cooperate, wherein the first slider 11 and the second slider 12 are slidably connected, and the second slider 12 and the third slider 13 are slidably connected, so that the demolding moving distance of the first clamping groove 31 can be respectively decomposed into the movement along the first slider 11, the movement along the second slider 12 and the movement along the mold opening direction, thereby not only reducing the thickness of the mold, but also reducing the width and the thickness of the mold, and reducing the material cost of the whole mold.
The multi-clamping groove die has low cost, which is reflected in the lower material cost of the die and the smaller die, and the processing cost of the die is also reduced; in addition, in the actual production process, the model of the selected injection molding machine is smaller, the purchasing cost of the injection molding machine is reduced, and more importantly, the time for opening and closing the smaller mold is reduced, so that the period is also reduced, and the production cost is reduced.
In particular, for a one-out-two mold developed for improving the production efficiency, the shape of the mold can be effectively changed from an elongated shape to a square shape as much as possible, in the specific embodiment, the external dimension of the original mold is 1200mm multiplied by 600mm multiplied by 780mm, the external dimension of the original mold is 800mm multiplied by 500mm multiplied by 590mm, the height dimension of the original mold is reduced by 1/3, the length dimension of the original mold is reduced by about 20%, the volume and the weight of the original mold are obviously reduced, the number of an injection molding machine used for the original mold is about 530T, the size of the injection molding machine used for the original mold is only 300T, the purchasing cost of the injection molding machine is reduced, the power consumption of the product is reduced, and the purposes of energy conservation and environmental protection are realized.
In terms of production efficiency, in this specific embodiment, the mold cycle of the present invention is shortened by about 15 seconds compared with the original mold, further improving the production efficiency, and increasing the durability of the mold, the mold tending to be square is extruded by the mold plate more evenly, so that the durability is improved, and it can be obviously observed that the mold is not easy to be eccentric, and the product is not easy to have the problems of flash, burr, etc.
Further preferably, as shown in fig. 1, 10 and 12, the second slide 12 is provided with a first slide groove 121 and a second slide groove 122, the first slide 11 is slidably connected by the first slide groove 121 and the second slide 12, the third slide 13 is slidably connected by the second slide groove 122 and the second slide 12, the second slide groove 122 is provided with a second slide groove contact surface 1221, the second slide groove contact surface 1221 contacts the third slide 13, and the demolding surface 311 of the first clamping groove 31 is perpendicular to the second slide groove contact surface 1221, in this specific embodiment, the demolding surface 311 and the third slide outer side 132 coincide.
Considering the production cost and the processing difficulty, the first sliding chute 121 and the second sliding chute 122 are both arranged on the second sliding block 12, so that the processing difficulty of the second sliding block 12 can be reduced, the production of the second sliding block 12 is more consistent, if the second sliding block 12 is provided with a bulge on one side and provided with the sliding chute on the other side, the processing modes on two sides are different, and the unnecessary production cost is increased; and because the third slider 13 is in contact with the first clamping groove 31, it must go deep into the mold core 5, the mold core 5 must also be provided with a through hole for the third slider 13 to pass through (as shown in fig. 6, the third slider 13 passes through the through hole on the mold core 5), the diameter of the through hole should be reduced as far as possible within the allowable range of conditions, the integrity of the mold core 5 can be effectively improved, and the occurrence of stress concentration, namely, the cracking problem in the use process, is prevented, so that the volume of the third slider 13 needs to be reduced, and compared with the second sliding groove 122 arranged on the third slider 13, the volume of the third slider 13 is larger, the processing is more difficult, and therefore, the second sliding groove 122 is arranged on the second slider 12, and the volume of the third slider 13 can be reduced.
As shown in fig. 1, 7 and 10, the demolding surface 311 of the first clamping groove 31 is perpendicular to the second sliding groove contact surface 1221, so that the demolding distance is longest under the condition of consistent demolding travel, and the moving distance of the third sliding block 13 along the second sliding block 12 is shortest, thereby effectively reducing the volume of the mold, and further achieving the purposes of reducing the cost and increasing the profit; if the demolding surface 311 of the first clamping groove 31 is not perpendicular to the second sliding groove contact surface 1221, the demolding moving direction of the third sliding block 13 is not parallel to the demolding surface 311, so that hard demolding occurs, and the appearance of the demolding surface 311 is affected.
In another preferred embodiment, as shown in fig. 10, the first slider 44 has a first slider contact surface 111, the first slider contact surface 111 contacts the first runner 121, the first slider contact surface 111 and the second runner contact surface 1221 are perpendicular to the first slider outer side 112, and the first slider outer side 112 is positioned as shown in fig. 10.
The first sliding block contact surface 111 and the second sliding groove contact surface 1221 are perpendicular to the first sliding block outer side surface 112, and the first sliding block contact surface 111 and the second sliding groove contact surface 1221 have two advantages, namely, the movement of the third sliding block 13 is caused by the mold opening action of the movable mold 2, and the third sliding block 13 drives the second sliding block 12 to move in the mold opening process, so that the demolding action is realized, the second sliding groove contact surface 1221 and the first sliding block contact surface 111 are kept perpendicular to the first sliding block outer side surface 112, and the second sliding block 12 is prevented from being clamped due to self gravity and friction force in the sliding process of the second sliding block 12; secondly, can reduce the distance that second slider 12 moved along first slider 11 in the die sinking in-process to realize reducing the effect of mould volume, because through first slider 11, second slider 12 and third slider 13 combined action, thereby play the purpose of reducing the mould size, therefore the preferred simultaneously mould length direction, mould width direction, mould height direction expand the mould size, avoid the mould to become rectangular, make the mould keep the square as far as possible, can effectively promote the quality (including overlap, external dimension precision, weight distribution etc.) of work piece 3.
As shown in fig. 7, the mold is in a mold closing state, and the third slider 13 is tightly attached to the workpiece 3; as shown in fig. 8, in the mold opening state, the third slider 13 is pulled by the mold release surface 311 on the workpiece 3, so as to drive the third slider 13 to move in the mold release direction, thereby realizing the purpose of slow mold release, and finally, the third slider 13 is completely separated from the mold release surface 311 on the workpiece 3.
Further preferably, as shown in fig. 9, for ease of understanding, the front view 9 is used to show the positions and functional relationships of the parts, the first sliding contact surface 111 forms an included angle α with the first sliding contact surface 113, the second sliding contact surface 1221 forms an included angle β with the first sliding contact surface 111, the demolding moving distance is D1, the mold opening moving distance is D2, d2=d1×cos γ is satisfied, during the mold opening operation, the distance of the second sliding contact surface 12 moving along the first sliding contact surface 111 is D3, d3=d2/sin β is satisfied, the distance of the second sliding contact surface 12 moving along the mold opening direction is D4, d4=d3cos α is satisfied, and the sum of the included angle α and the included angle β is not greater than 90 °. The orientation of the first slider bottom surface 113 is shown in fig. 8 and 9.
It should be noted that D1, D2, D3 and D4 refer to moving distances, and are auxiliary dot-dash lines for connection, and different functional relationships are formed according to different included angles.
As shown in fig. 9, the relationship between the demolding moving distance D1 and the demolding moving distance D2 is a function d2=d1, cos γ, the distance d3=d2/sin β that the second slider 12 moves along the first slider contact surface 111, the distance d4=d3cos α that the second slider 12 moves along the demolding direction, and the obtained distances D1, D2, D3, D4 maintain a linear relationship, so that it is ensured that the demolding moving distance linearly increases with the linear increase of the demolding moving distance during the demolding process, and the problem that the surface of the first clamping groove 31 is scratched due to negligence of the demolding process does not occur; the sum of the included angle α and the included angle β is not greater than 90 °, so that the second sliding groove contact surface 1221 and the first sliding block bottom surface 113 can be ensured to form an acute angle, and the third sliding block 13 is prevented from deflecting toward the first sliding block 11, so that the third sliding block 13 and the first sliding block 11 interfere, and the volume of the third sliding block 13 and the first sliding block 11 is further increased to avoid interference, so that the purpose of reducing the volume of the die cannot be achieved.
In a further preferred embodiment, as shown in fig. 9, the angle α is greater than the angle β.
From principle analysis, the size of the included angle alpha and the included angle beta does not influence the demolding moving distance D1 to decompose and form the moving distance D3 of the second sliding block 12 along the first sliding block contact surface 111 and the moving distance D4 of the second sliding block 12 along the mold opening direction, but in the actual production process, the included angle alpha is larger than the included angle beta, and the demolding moving distance D1 can be simultaneously decomposed into the length, width and height directions of the mold at the same time, so that the mold is prevented from being oversized in a certain size to cause oversized model of an injection molding machine used for the mold.
Further preferably, the angle α is not greater than 45 °.
Considering that the die opening distance D2 can be decomposed into a distance moved along the second slide contact surface 1221 and a distance D3 moved along the first slide contact surface 111, if the angle α is too small, the distance D4 moved in the die opening direction of the second slide 12 becomes large with the angle β and the angle γ kept unchanged, thereby increasing the die volume, and thus making the angle α as large as possible within the allowable range of conditions; however, in the actual production process, the too large included angle α may cause the too large moving distance perpendicular to the mold opening direction, thereby increasing the height of the mold, and thus, the included angle α is not more than 45 ° in comprehensive consideration.
In a further preferred embodiment, as shown in fig. 10, a third protrusion 131 is provided on the third slider 13, the third slider 13 is slidably connected to the second chute 122 through the third protrusion 131, and the third protrusion outer side 1311 is parallel to the demolding surface 311 of the first card slot 31, where the orientation of the third protrusion outer side 1311 is shown in fig. 10.
It should be noted that, although the third protrusion outer side surface 1311 is not parallel to the demolding surface 311 of the first clamping groove 31, the required demolding action can be completed, and considering the difficulty of production and the processing cost, the milling cutter angle is additionally replaced when the non-parallel operation is required, so that the additional cost is increased, and the third protrusion outer side surface 1311 is ensured to be parallel to the demolding surface 311 of the first clamping groove 31, so that the milling cutter can be processed and molded once, and the processing cost and time are reduced; and ensuring that third projection outer side 1311 is parallel to third slider outer side 132 and demolding surface 311 reduces the amount of computation, ensuring that the final direction of movement of third slider 13 is consistent with the demolding direction.
As shown in fig. 3 and 6, the movable mold 2 preferably has a first demolding and resetting assembly 21, and the first demolding and resetting assembly 21 is convexly provided with a resetting portion 211, and the resetting portion 211 contacts with the second slider 12 during the mold closing operation, and the resetting portion 211 is adapted to push the second slider 12 to reset.
The first demolding assembly 10 has two resetting modes, and the fixed mold 1 can be reset along the opposite direction of the demolding direction under the condition that the first demolding resetting assembly 21 is not used, but in actual production, the resetting part 211 is additionally arranged, so that the resetting part 211 pushes the second slide block 12 to reset, the mold clamping speed in the production process can be increased, and the second slide block 12 is prevented from being separated due to the fact that the mold clamping speed is too high.
In a further preferred embodiment, as shown in fig. 5 and 7, the first demolding assembly 10 is fixedly connected with a limiting assembly 14, and in this particular embodiment, as shown in fig. 5, the limiting assembly 14 is fixed on the fixed mold 1 through bolts, and the limiting assembly 14 is suitable for limiting the left-right sliding of the second slider 12; the second slider 12 has a second limiting block 123, and when the second limiting block 123 is at the end of closing the mold, the second limiting block 123 contacts the limiting assembly 14, and the second limiting block 123 is adapted to limit the maximum moving distance of the second slider 12.
In the actual production process, the production process can still be completed without adding the limiting component 14 and the second limiting block 123, but because the die and the first demolding component 10 are affected by inertia in the die closing action, the inertia force has little influence on the die when the die closing speed is not fast, but because the die closing speed can be accelerated in order to reduce the production cost and reduce the production period, if the limiting component 14 and the second limiting block 123 are not added, the second sliding block 12 can be flushed out of the first sliding groove 121 due to the inertia force, so that the first demolding component 10 fails.
Further preferably, as shown in fig. 10 and 11, wherein fig. 11 is an isometric view of the first stripper assembly 10, the first slide contact surface 111 is provided with wear blocks 1111, the wear blocks 1111 being adapted to reduce wear of the first slide 11 and the second slide 12; as shown in fig. 11, the limiting component 14 is provided with a quick-release hole 141, and the quick-release hole 141 is suitable for replacing the third slider 13.
It should be noted that, the wear-resistant block 1111 needs to be added on the first sliding block contact surface 111, but the wear-resistant block 1111 cannot be added on the second sliding groove contact surface 1221, because the third sliding block 13 needs to rely on friction force to keep the sliding distance of the third sliding block 13 on the second sliding groove contact surface 1221 not too long and ensure that the sliding speed is not too fast, and needs to rely on friction force to counteract a part of gravity to prevent the third sliding block from naturally sliding after the die opening, the quick-release hole 141 needs to be arranged on the limiting component 14, and when the third sliding block 13 is worn, the third sliding block 13 can be conveniently slid more, so that the functions of lowest maintenance cost and best maintenance effect are achieved; when the third slider 13 needs to be replaced, only the second slider 12 and the third slider 13 need to be moved reversely, so that the third slider 13 passes through the quick-release hole 141, and quick-release and quick-replacement of the third slider 13 are realized.
The foregoing has outlined the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (5)
1. The forming die for the multi-clamping-groove workpiece comprises a fixed die and a movable die, and is characterized in that a first demolding assembly is arranged on the fixed die and comprises a first sliding block, a second sliding block and a third sliding block, wherein the first sliding block is fixedly connected to the fixed die, the second sliding block is slidably connected to the first sliding block, the third sliding block is slidably connected to the second sliding block, and the third sliding block is suitable for forming a first clamping groove of the workpiece; the fixed die is provided with a second demolding assembly, and the second demolding assembly is suitable for forming a second clamping groove of the workpiece; the depth of the first clamping groove is larger than that of the second clamping groove;
When the mold is in the mold closing state, the third sliding block is abutted against the first clamping groove, and the second demolding assembly is abutted against the second clamping groove; when the mold is in the mold opening state, the third sliding block is separated from the first clamping groove, and the second demolding assembly is separated from the second clamping groove; an included angle gamma is formed between the demolding direction of the first clamping groove and the mold opening direction of the movable mold, wherein gamma is more than 0 degrees and less than 90 degrees; the demolding direction of the second clamping groove is the same as the mold opening direction of the movable mold;
the second sliding block is provided with a first sliding groove and a second sliding groove, the first sliding block is slidably connected with the second sliding block through the first sliding groove, the third sliding block is slidably connected with the second sliding block through the second sliding groove, the second sliding groove is provided with a second sliding groove contact surface, the second sliding groove contact surface is in contact with the third sliding block, and the demolding surface of the first clamping groove is perpendicular to the second sliding groove contact surface; the first sliding block is provided with a first sliding block contact surface, the first sliding block contact surface is in contact with the first sliding groove, and the first sliding block contact surface and the second sliding groove contact surface are perpendicular to the outer side surface of the first sliding block;
the first sliding block contact surface and the bottom surface of the first sliding block form an included angle alpha, the second sliding groove contact surface and the first sliding block contact surface form an included angle beta, the demolding moving distance is D1, the demolding moving distance is D2, d2=d1×cos gamma is met, during mold opening action, the moving distance of the second sliding block along the first sliding block contact surface is D3, d3=d2/sin beta is met, the moving distance of the second sliding block along the mold opening direction is D4, d4=d3×cos alpha is met, and the sum of the included angle alpha and the included angle beta is not more than 90 degrees; the included angle alpha is larger than the included angle beta; the included angle alpha is not greater than 45 deg..
2. The multi-slot workpiece forming die of claim 1, wherein a third protrusion is arranged on the third slider, the third slider is slidably connected with the second chute through the third protrusion, and the outer side surface of the third protrusion is parallel to the demolding surface of the first slot.
3. The multi-slot workpiece forming die of claim 1, wherein the movable die is provided with a first demolding and resetting assembly, a resetting part is convexly arranged on the first demolding and resetting assembly, and the resetting part is contacted with the second sliding block during die closing action, and the resetting part is suitable for pushing the second sliding block to reset.
4. The multi-slot workpiece forming die of claim 3, wherein the first stripping assembly is fixedly connected with a limiting assembly, and the limiting assembly is suitable for limiting the second sliding block to slide left and right; the second sliding block is provided with a second limiting block, when the second sliding block is at the closing end point, the second limiting block is in contact with the limiting component, and the second limiting block is suitable for limiting the maximum moving distance of the second sliding block.
5. The multi-slot workpiece forming die of claim 4, wherein the first slider contact surface is provided with a wear block adapted to reduce wear of the first slider and the second slider; the limiting assembly is provided with a quick-release hole, and the quick-release hole is suitable for replacing the third sliding block.
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| KR102352901B1 (en) * | 2016-08-01 | 2022-01-19 | 닝보 써니 오포테크 코., 엘티디. | Photographing module, molded circuit board assembly and molded photosensitive assembly thereof and manufacturing methods |
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| JP2010110916A (en) * | 2008-11-04 | 2010-05-20 | Olympus Corp | Mold for injection molding |
| CN202378251U (en) * | 2011-11-21 | 2012-08-15 | 东莞康佳模具塑胶有限公司 | New core pulling mechanism |
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