CN115008694A - Injection molding mold and molding method for cylindrical roller bearing retainer - Google Patents
Injection molding mold and molding method for cylindrical roller bearing retainer Download PDFInfo
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- CN115008694A CN115008694A CN202210520256.XA CN202210520256A CN115008694A CN 115008694 A CN115008694 A CN 115008694A CN 202210520256 A CN202210520256 A CN 202210520256A CN 115008694 A CN115008694 A CN 115008694A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 103
- 238000000465 moulding Methods 0.000 title description 13
- 238000000034 method Methods 0.000 title description 5
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 20
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007493 shaping process Methods 0.000 description 14
- 238000009434 installation Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
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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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C2045/2709—Gates with a plurality of mould cavity inlets in close proximity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/04—Bearings
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides an injection molding die and an injection molding method for a cylindrical roller bearing retainer, and relates to the technical field of bearing retainer production equipment, wherein the injection molding die adopts the following scheme: the injection molding die comprises a female die and a male die, wherein a male die core and a plurality of sliding blocks are arranged on the male die, an injection molding cavity is formed between each sliding block and each male die core, the female die core is arranged in the female die, a vertical injection molding main channel is arranged in each female die core, a plurality of injection molding sub-channels are communicated with the lower part of each injection molding main channel, and outlets of the injection molding sub-channels are communicated with the injection molding cavity; the male die is provided with a thimble plate group, the thimble plate group is provided with a plurality of thimbles, the thimbles are vertically arranged, and the thimbles are positioned at the lower parts of the injection molding main channel and the injection molding cavity. The automatic production can be realized, the period is short, the size of the produced product is stable, and the structure of the die is stable and reliable.
Description
Technical Field
The invention relates to the technical field of bearing retainer production equipment, in particular to an injection molding die and a molding method for a cylindrical roller bearing retainer.
Background
The production process of the cylindrical roller bearing retainer generally comprises the steps of leveling, cutting, rounding, welding and shaping a plate material. A plurality of devices cooperate to form a production line, the process is more, the period is long, the efficiency is low, and if one link goes wrong, the quality of the whole retainer can be caused to go wrong.
Therefore, in view of the above situation, there is a need to develop an injection mold and a molding method for a cylindrical roller bearing retainer.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the injection molding mold for the cylindrical roller bearing retainer, which can realize automatic production, short period, stable size of a produced product and stable and reliable structure of the mold.
The technical scheme adopted by the invention for solving the technical problems is as follows: an injection molding mold for a cylindrical roller bearing retainer comprises a female mold and a male mold, wherein a male mold core and a plurality of sliding blocks are arranged on the male mold, the sliding blocks are arranged around the male mold core, an injection molding cavity is formed between the sliding blocks and the male mold core, a female mold core is arranged in the female mold core, a vertical injection molding main channel is arranged in the female mold core, a plurality of injection molding sub-channels are communicated with the lower portion of the injection molding main channel, the injection molding sub-channels are arranged in a scattering manner around the injection molding main channel, outlets of the injection molding sub-channels are communicated with the injection molding cavity, the injection molding sub-channels comprise an upper arc-shaped groove and a lower arc-shaped groove, the upper arc-shaped groove is located at the bottom of the female mold, the lower arc-shaped groove is located at the top of the male mold, and the upper arc-shaped groove and the lower arc-shaped groove are combined to form a main channel; the male die is provided with a thimble plate group, the thimble plate group is provided with a plurality of thimbles, the thimbles are vertically arranged, and the thimbles are positioned at the lower parts of the injection molding main channel and the injection molding cavity. The injection molding main channel is internally injected with the plastic, the plastic flows downwards into each injection molding sub-channel along the injection molding main channel, then flows into different positions at the same height of the injection molding cavity through the sub-channels which are distributed in a scattering shape, and is uniformly distributed, so that the molding efficiency is improved, the molding quality is ensured, after injection molding, material handles are formed in the injection molding main channel and the injection molding sub-channels, and the material handles are connected with the molded cylindrical roller bearing retainer at the outlets of the injection molding sub-channels; the plurality of sliding blocks are arranged in a surrounding manner, and each sliding block can be disassembled and assembled, so that the replacement and maintenance are convenient and the operation is more flexible; through the mode that upper arc wall, lower arc wall cooperate, when taking down the master model, the material exposes upper portion, utilizes the pushing mechanism of injection molding machine upwards to promote thimble group, and then promotes the thimble and rise, and the thimble upwards pushes up fashioned cylindrical roller bearing holder, does benefit to taking out of cylindrical roller bearing holder.
Further, the branch passageway of moulding plastics still includes exit channel, exit channel's upper end intercommunication main part passageway, exit channel's lower extreme intercommunication injection moulding chamber, and exit channel down leans out gradually from last, and the exit channel slope is arranged, does benefit to when guaranteeing to communicate the injection moulding chamber smoothly and takes out the material from upper portion. The outlet channel is tapered from top to bottom, so that the purposes of controlling the flow rate and slightly loosening the connecting point of the broken material handle and the cylindrical roller bearing retainer are achieved. Wherein, the upper portion of the main channel of moulding plastics is provided with the purt mouth, and the upper portion of master model is provided with the position circle, and the purt mouth is located the intermediate position of position circle, is convenient for connect the interior with the injection molding machine and moulds plastics.
Further, the inside of slider sets up the shaping arch, the bellied upper portion of shaping is provided with upper circumference portion shaping groove, the bellied lower part of shaping is provided with lower circumference portion shaping groove, the bellied lateral part of shaping is provided with middle support portion shaping groove. The inner side surface of the forming bulge is used for clinging to the side surface of the male die core, a pocket of the retainer is formed at the position after the forming is blocked, an upper circumferential part is formed at the position of the upper circumferential forming groove, an intermediate support part is formed at the position of the intermediate support part forming groove, and a lower circumferential part is formed at the position of the lower circumferential forming groove.
Further, the inboard below of going up circumference shaping groove is provided with upper flange groove, the inboard top of circumference shaping groove is provided with lower flange groove down, moulds plastics and forms inboard flange, and the bottom surface of upper flange groove's lower flange groove is the inclined plane to form the chamfer, the degree of depth of circumference shaping groove is greater than the degree of depth of intermediate strut portion shaping groove down, and the bottom surface of circumference shaping groove is more outer down promptly, outwards stands out in the intermediate strut portion shaping groove, and the protruding part forms the outer flange of circumference down, and the lateral wall of protruding part is the inclined plane, in order to form the chamfer. Furthermore, the female die is provided with a convex ring, the convex ring is positioned in the middle of the upper circumferential part forming groove, the convex ring extends into the upper circumferential part forming groove, and an annular groove is formed on the upper surface of the upper circumferential part after injection molding. So far, can form the cylindrical roller bearing holder structure in this scheme, intensity is higher, and the quality is more stable, and is longe-lived.
Further, be provided with a plurality of with the shovel base of slider adaptation on the master model, the lateral surface of slider is from up the first inclined plane of leanin gradually down, and the medial surface of shovel base is from up the second inclined plane of leanin gradually down, and the second inclined plane is laminated with first inclined plane mutually, can compress tightly. The female die is provided with a plurality of inclined guide pillars corresponding to the sliding block, the sliding block is provided with inclined insertion holes, the inclined guide pillars are inserted into the inclined insertion holes from the upper portion, the inclined direction of the inclined guide pillars is the same as the inclined direction of the first inclined plane, and the inclined guide pillars are inclined inwards gradually from bottom to top. When the female die is lifted upwards, an upward force is applied to the sliding block due to the inclination of the inclined guide post, so that the sliding block moves, namely moves upwards, and the sliding block moves upwards due to the fact that part of the structure of the cylindrical roller bearing retainer is located above the forming bulge, interference is formed when the sliding block moves upwards, and the part is pushed to move, so that the formed cylindrical roller bearing retainer is separated. Wherein, the shovel base is fixed on the female die through the connecting piece. Adapt to slider quantity, through a plurality of shovel bases around arranging, every all can dismantle the installation, is convenient for change the maintenance. In this scheme, the connecting piece is the screw, and the screw passes the shovel base from the bottom and inserts the master model in, and the bottom surface of shovel base is the horizontal plane, is provided with the recess on the bottom surface of shovel base, and the pin fin of screw is arranged in the recess to guarantee that the master model bottom surface is level and smooth, laminate completely with public mould upper surface. The sliding block is provided with a spring hole, a first spring is installed in the spring hole, one end of the first spring abuts against the side wall of the male die core, when the female die is covered, the shovel base can provide inward pressing force for the sliding block to press the sliding block tightly, and after the female die is removed, the sliding block can return to the original position under the action of the first spring.
Further, public mould includes the fixed plate, sets up the through-hole that passes with injection molding machine pushing mechanism on the fixed plate, and the both sides of fixed plate are provided with the mould leg, and the backing plate is installed on the upper portion of mould leg, and public template is installed on the upper portion of backing plate, and the fixed plate, the mould leg, the backing plate, connect and install the location through the reference column between the common mode board, set up the mould leg through both sides, leave installation space between the mould leg of both sides to do benefit to thimble and top board, the motion of roof down, mould leg upper portion sets up the backing plate, a purpose for playing the outrigger to public template. The transversal square of personally submitting of public template, four sides of public template all are provided with the mounting groove, the protruding installation groove of passing through the connecting piece of locator card, the protruding upper portion of locator card is higher than the last face of public template, the protruding position of locator card is in the mounting groove, be provided with corresponding positioning channel section on the master model, the lateral surface parallel and level of the protruding lateral surface of messenger's locator card and public template guarantees the surface planarization, and realizes demountable installation through the connecting piece, it is protruding to be convenient for change the locator card. The attachment means are preferably screws. The periphery of the upper portion of the male die is provided with at least two guide posts in a surrounding mode, the guide posts are higher than the upper surface of the male die, the female die is provided with guide holes corresponding to the female die, and guide sleeves are arranged in the guide holes to play a role in guiding. After the female die is installed on the male die, the female die and the male die are locked through the locking module on the outer wall. The female die is directly sleeved on the guide post through the guide sleeve during installation, then stably moves downwards along the guide post to be attached to the upper surface of the male die, the positioning clamp and the positioning groove play a role in matching and positioning, accurate positioning is achieved, and then the male die and the female die are locked through the locking module, so that the male die and the female die are matched tightly.
Furthermore, the plurality of thimbles divide into long thimble and short thimble according to the length difference, and long thimble is located the intermediate position, and the upper portion of long thimble is used for pushing the material handle, and short thimble is located week side position and encircles and be the circle, and week side short thimble is used for pushing the lower terminal surface of cylindrical roller bearing holder from a plurality of positions. Furthermore, the thimble plate group comprises a lower top plate and an upper top plate, the lower part of the thimble is connected to the lower top plate, and the thimble penetrates through the upper top plate. The upper top plate and the lower top plate are connected through a connecting piece, the connecting piece is preferably a bolt, the upper top plate is a plate used for fixing the push-out and return pin and the push plate guide sleeve, and the upper top plate and the lower top plate are detachably connected through the connecting piece to achieve the effect of facilitating installation. The upper top plate is connected with a return pin, the lower part of the return pin is installed at the bottom of the upper top plate, the upper part of the return pin extends into the male template, the second spring is sleeved on the return pin, and the second spring is located between the male template and the upper top plate. The fixed plate is connected with a middle support, and the middle support penetrates through the fixed plate, the lower top plate, the upper top plate and the supporting plate and then is inserted into the male template to play a role in guiding.
Furthermore, a limiting column is arranged in the male die, and the limiting column can block the upper part of the upper ejector plate and limit the ejection stroke of the ejector plate. And the fixed plate is provided with an induction device for detecting whether the lower top plate resets or not, and if the lower top plate does not reset, the fixed plate stops working.
In addition, the scheme also provides an injection molding method of the cylindrical roller bearing retainer, and the injection molding mold of the cylindrical roller bearing retainer mainly comprises the following steps:
A1. injecting the plastic into the injection main channel through an injection molding machine, and entering the injection molding cavity through the injection sub-channel;
A2. the cylindrical roller bearing retainer is molded in the injection molding cavity, and the material handle is molded in the injection molding main channel and the injection molding branch channel;
A3. and (3) detaching the female die, providing a driving force for the ejector pin plate group from the bottom, upwards pushing the ejector pin plate group, further pushing the ejector pin to ascend, upwards pushing the formed cylindrical roller bearing retainer and the material handle by the ejector pin, and then resetting the ejector pin plate group.
According to the technical scheme, the invention has the following advantages:
the scheme provides an injection molding die and an injection molding method for a cylindrical roller bearing retainer, wherein injection molding is carried out inwards from an injection main channel, the injection molding sub-channels flow downwards along the injection main channel and then flow into different positions at the same height of an injection molding cavity through sub-channels arranged in a scattering manner and are uniformly distributed, the molding efficiency is improved, the molding quality is ensured, after injection molding, material handles are formed in the injection main channel and the injection sub-channels, and the material handles are connected with the molded cylindrical roller bearing retainer at the outlets of the injection sub-channels; the plurality of sliding blocks are arranged in a surrounding manner, and each sliding block can be disassembled and assembled, so that the replacement and maintenance are convenient and the operation is more flexible; through the mode that the upper arc-shaped groove is matched with the lower arc-shaped groove, when the female die is taken down, the upper part of the material handle is exposed, the ejector pin plate group is upwards pushed by the pushing mechanism of the injection molding machine, the ejector pins are further pushed to ascend, and the ejector pins upwards push the formed cylindrical roller bearing retainer, so that the cylindrical roller bearing retainer is favorably taken out. The automatic production can be realized, the period is short, the size of the produced product is stable, and the structure of the die is stable and reliable.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a master mold in an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a male mold according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a core insert according to an embodiment of the invention.
FIG. 5 is a schematic structural diagram showing a portion of the internal coordination relationships in accordance with an embodiment of the present invention.
FIG. 6 is a schematic structural diagram illustrating another portion of the internal fitting relationship according to the embodiment of the present invention.
FIG. 7 is a schematic structural diagram of a slider according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of a cylindrical roller bearing cage with a material handle according to an embodiment of the present invention.
In the figures, 1, a female die, 2, a male die, 3, a lock module, 4, a positioning ring, 5, a sprue bush, 6, a positioning clamping groove, 7, a positioning clamping protrusion, 8, a male die plate, 9, a backing plate, 10, a die leg, 11, a fixing plate, 12, a second spring, 13, a limiting column, 14, a lower top plate, 15, an upper top plate, 16, a thimble, 17, an injection main channel, 18, an upper arc-shaped groove, 19, a female die core, 20, a shovel base, 21, a slide block, 22, an inclined insertion hole, 23, a guide column, 24, a male die core, 25, a lower arc-shaped groove, 26, an outlet channel, 27, an injection sub-channel, 28, an injection molding cavity, 29, a guide sleeve, 30, a return pin, 31, a positioning column, 32, a middle support, 33, a raised ring, 100, a material handle, 101, an upper circumferential portion, 102, a middle support portion, 103, a lower portion, 104, an inner flange, 105, 211, an outer flange 106, a ring-shaped groove, 211, and a molding protrusion, 212. upper circumferential portion forming groove 213, upper flange groove 214, middle support portion forming groove 215, lower flange groove 216, lower circumferential portion forming groove 217, spring hole.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments in this patent without making creative efforts, shall fall within the protection scope of this patent.
Detailed description of the preferred embodiment 1
As shown in fig. 1 to 8, the present embodiment provides an injection molding mold for a cylindrical roller bearing retainer, which includes a female mold half 1 and a male mold half 2, the male mold half 2 is provided with a male mold insert 24 and a plurality of sliders 21, the plurality of sliders 21 are arranged around the male mold insert 24, an injection molding cavity 28 is formed between the sliders 21 and the male mold insert 24, the female mold half 1 is provided with a female mold insert 19, the female mold insert 19 is provided with a vertical injection molding main channel 17, the lower portion of the injection molding main channel 17 is communicated with a plurality of injection sub channels 27, the plurality of injection sub channels 27 are arranged around the injection molding main channel 17 in a scattering manner, outlets of the injection sub channels 27 are communicated with the injection molding cavity 28, the injection sub channels 27 include an upper arc-shaped groove 18 and a lower arc-shaped groove 25, the upper arc-shaped groove 18 is located at the bottom of the female mold half 1, the lower arc-shaped groove 25 is located at the top of the male mold half 2, and the upper arc-shaped groove 18 and the lower arc-shaped groove 25 are combined to form a main channel; the male die 2 is provided with a thimble 16 group, the thimble 16 group is provided with a plurality of thimbles 16, the thimbles 16 are vertically arranged, and the thimbles 16 are positioned at the lower parts of an injection molding main channel 17 and an injection molding cavity 28.
Wherein, moulding plastics and dividing passageway 27 still includes outlet channel 26, and outlet channel 26's upper end intercommunication main part passageway, outlet channel 26's lower extreme intercommunication injection moulding chamber 28, and outlet channel 26 is from last down outwards sloping gradually, and outlet channel 26 inclines to be arranged, does benefit to from upper portion and takes out the material when guaranteeing to communicate injection moulding chamber 28 smoothly. The outlet passage 26 is tapered from top to bottom to achieve the purposes of controlling the flow rate and slightly loosening the connecting point of the broken material handle and the cylindrical roller bearing retainer. Wherein, the upper portion of the main channel 17 of moulding plastics is provided with the sprue bushing 5, and the upper portion of master model 1 is provided with position circle 4, and sprue bushing 5 is located the intermediate position of position circle 4, is convenient for connect the interior with the injection molding machine and moulds plastics. A forming protrusion 211 is provided at an inner side of the slider 21, an upper circumferential portion forming groove 212 is provided at an upper portion of the forming protrusion 211, a lower circumferential portion forming groove 216 is provided at a lower portion of the forming protrusion 211, and a middle support portion forming groove 214 is provided at a side portion of the forming protrusion 211. The inner side surface of the forming protrusion 211 is used for being attached to the side surface of the core insert 24, a pocket of the retainer is formed at the position after the forming is blocked, an upper circumferential portion 101 is formed at the position of the upper circumferential forming groove, an intermediate support portion 102 is formed at the position of the intermediate support portion forming groove 214, and a lower circumferential portion 103 is formed at the position of the lower circumferential forming groove. An upper flange groove 213 is formed below the inner side of the upper circumferential portion forming groove 212, a lower flange groove 215 is formed above the inner side of the lower circumferential portion forming groove 216, an inner flange 104 is formed by injection molding, the bottom surfaces of the lower flange grooves 215 of the upper flange groove 213 are inclined to form a chamfer, the depth of the lower circumferential portion forming groove 216 is greater than the depth of the middle support portion forming groove 214, that is, the bottom surface of the lower circumferential portion forming groove 216 is further outward than the middle support portion forming groove 214, the protrusion portion forms the outer flange 105 of the lower circumferential portion 103, and the side wall of the protrusion portion is inclined to form a chamfer. Further, the master model 1 is provided with a projecting ring 33, the projecting ring 33 is located at a middle position of the upper circumferential portion forming groove 212, the projecting ring 33 is inserted into the upper circumferential portion forming groove, and an annular groove 106 is formed on the upper surface of the upper circumferential portion 101 after injection molding. So far, can form the cylindrical roller bearing holder structure in this scheme, intensity is higher, and the quality is more stable, and is longe-lived.
Wherein, be provided with a plurality of shovel bases 20 with the slider 21 adaptation on the master model 1, the lateral surface of slider 21 is from up the first inclined plane of leanin gradually down, and the medial surface of shovel base 20 is from up the second inclined plane of leanin gradually down, and the second inclined plane is laminated with first inclined plane mutually, can compress tightly. The female die 1 is provided with a plurality of inclined guide posts corresponding to the sliding block 21, the sliding block 21 is provided with inclined insertion holes 22, the inclined guide posts are inserted into the inclined insertion holes 22 from the upper part, and the inclined directions of the inclined guide posts are the same as those of the first inclined plane and are gradually inclined inwards from bottom to top. When the female die 1 is lifted upwards, an upward force is applied to the slide block 21 due to the inclination of the inclined guide post, so that the slide block moves, namely moves upwards, and as part of the structure of the cylindrical roller bearing retainer is positioned above the forming bulge 211, interference is formed when the slide block 21 moves upwards, the part is pushed, and the formed cylindrical roller bearing retainer is separated. Wherein, the shovel base 20 is fixed on the female die 1 through a connecting piece. The adaptation slider 21 quantity is around arranging through a plurality of shovel bases 20, and every all can be dismantled the installation, is convenient for change the maintenance. In this scheme, the connecting piece is the screw, and the screw passes shovel base 20 from the bottom and inserts in master model 1, and the bottom surface of shovel base 20 is the horizontal plane, is provided with the recess on the bottom surface of shovel base 20, and the pin fin of screw is arranged in the recess to guarantee that 1 bottom surface of master model is level and smooth, laminates with 2 upper surfaces of public mould completely. The slide block 21 is provided with a spring hole 217, a first spring is arranged in the spring hole 217, one end of the first spring abuts against the side wall of the male die core 24, when the female die 1 is covered, the shovel base 20 can provide inward pressing force to the slide block 21 to press the slide block, and after the female die 1 is removed, the slide block 21 can return to the original position under the action of the first spring.
Wherein, public mould 2 includes fixed plate 11, sets up the through-hole that passes with injection molding machine pushing mechanism on the fixed plate 11, and the both sides of fixed plate 11 are provided with mould leg 10, and backing plate 9 is installed on the upper portion of mould leg 10, and public template 8 is installed on the upper portion of backing plate 9, sets up mould leg 10 through both sides, leaves installation space between the mould leg 10 of both sides to do benefit to the motion of thimble 16 and last roof 15, roof 14 down, mould leg 10 upper portion sets up backing plate 9, is used for playing the purpose of stable stay to public template 8. The transversal square of personally submitting of public template 8, four sides of public template 8 all are provided with the mounting groove, the protruding 7 of locator card is installed in the mounting groove through the connecting piece, the upper portion of the protruding 7 of locator card is higher than the last face of public template 8, the protruding 7 of locator card is located the mounting groove, be provided with corresponding locator card groove 6 on the master model 1, make the lateral surface of the protruding 7 of locator card and the lateral surface parallel and level of public template 8, guarantee the surface smoothness, and realize demountable installation through the connecting piece, be convenient for change the protruding 7 of locator card. The attachment means are preferably screws. At least two guide posts 23 are arranged around the periphery of the upper part of the male die 2, the guide posts 23 are higher than the upper surface of the male die 2, the female die 1 is provided with corresponding guide holes, and guide sleeves 29 are arranged in the guide holes to play a role in guiding. After the female die 1 is installed on the male die 2, the female die and the male die are locked through the locking die block 3 on the outer wall. When the female die 1 is installed, the guide post 23 is directly sleeved with the guide sleeve 29, then the male die 2 is stably and downwards moved along the guide post 23 to be attached to the upper surface of the male die, the positioning clamping protrusions 7 and the positioning grooves have the matching and positioning effects, accurate positioning is achieved, and then the male die 2 and the female die 1 are locked through the locking module 3, so that the male die 2 and the female die 1 are tightly matched.
The plurality of ejector pins 16 are divided into a long ejector pin 16 and a short ejector pin 16 according to their lengths, the long ejector pin 16 is located at an intermediate position, an upper portion of the long ejector pin 16 is used to eject the grip 100, the short ejector pin 16 is located at a circumferential position and is looped around, and the circumferential short ejector pin 16 is used to eject a lower end surface of the cylindrical roller bearing holder from a plurality of positions. Further, the group of ejector pins 16 includes a lower top plate 14 and an upper top plate 15, the lower portion of the ejector pin 16 is connected to the lower top plate 14, and the ejector pin 16 penetrates through the upper top plate 15. The upper top plate 15 and the lower top plate 14 are connected through a connecting piece, the connecting piece is preferably a bolt, the upper top plate 15 is a plate used for fixing the push-out and return pin 30 and the push plate guide sleeve, and the upper top plate 15 and the lower top plate 14 are detachably connected through the connecting piece to achieve the effect of facilitating installation. The upper top plate 15 is connected with a return pin 30, the lower part of the return pin 30 is installed at the bottom of the upper top plate 15, the upper part of the return pin 30 extends into the male template 8, the return pin 30 is sleeved with a second spring 12, and the second spring 12 is located between the male template 8 and the upper top plate 15. The fixing plate 11 is connected with a middle support 32, and the middle support 32 penetrates through the fixing plate 11, the lower top plate 14, the upper top plate 15 and the supporting plate and then is inserted into the male template 8 to play a role in guiding. The male die 2 is provided with a limiting column 13, and the limiting column 13 can block the upper part of the upper ejector plate 15 and limit the ejection stroke of the ejector pin 16 plate. The fixed plate 11 is provided with a sensing device for detecting whether the lower top plate 14 is reset or not, and if the reset is not indicated, the operation is stopped.
Detailed description of the preferred embodiment 2
The specific embodiment provides an injection molding method of a cylindrical roller bearing retainer, and the injection molding mold of the cylindrical roller bearing retainer in the specific embodiment 1 is used, and the injection molding method comprises the following steps:
A1. injecting the mixture into the injection main channel 17 through an injection molding machine, and entering an injection molding cavity 28 through an injection sub-channel 27;
A2. the cylindrical roller bearing retainer is molded in an injection molding cavity 28, and the material handle 100 is molded in an injection molding main channel 17 and an injection molding branch channel 27;
A3. detaching the female die 1, providing a pushing force to the thimble 16 plate group from the bottom, pushing the thimble 16 plate group upwards, further pushing the thimble 16 to ascend, pushing the formed cylindrical roller bearing retainer and the material handle 100 upwards by the thimble 16, and then resetting the thimble 16 plate group under the action of the spring.
The terms "upper", "lower", "outside", "inside", and the like in the description and claims of the present invention and the above-described drawings (if any) are used for distinguishing relative positions without necessarily being construed qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An injection molding die for a cylindrical roller bearing retainer is characterized by comprising a female die and a male die, wherein the male die is provided with a male die core and a plurality of sliding blocks, the sliding blocks are arranged around the male die core, an injection molding cavity is formed between the sliding blocks and the male die core, the female die core is arranged in the female die, a vertical injection molding main channel is arranged in the female die core, the lower part of the injection molding main channel is communicated with a plurality of injection molding sub-channels, the injection molding sub-channels are arranged in a scattering manner around the injection molding main channel, outlets of the injection molding sub-channels are communicated with the injection molding cavity, the injection molding sub-channels comprise an upper arc-shaped groove and a lower arc-shaped groove, the upper arc-shaped groove is positioned at the bottom of the female die, the lower arc-shaped groove is positioned at the top of the male die, and the upper arc-shaped groove and the lower arc-shaped groove are combined to form a main body channel; the male die is provided with a thimble plate group, the thimble plate group is provided with a plurality of thimbles, the thimbles are vertically arranged, and the thimbles are positioned at the lower parts of the injection molding main channel and the injection molding cavity.
2. The injection mold for cylindrical roller bearing retainer according to claim 1, wherein the injection branch passage further comprises an outlet passage, an upper end of the outlet passage communicates with the main body passage, a lower end of the outlet passage communicates with the injection molding cavity, and the outlet passage is gradually inclined outward from top to bottom.
3. The injection mold for cylindrical roller bearing cage according to claim 1, wherein the inside of the slider is provided with a forming protrusion, the upper portion of which is provided with an upper circumferential portion forming groove, the lower portion of which is provided with a lower circumferential portion forming groove, and the side portion of which is provided with an intermediate support portion forming groove.
4. The injection mold for a cylindrical roller bearing cage according to claim 3, wherein an upper flange groove is provided below an inner side of the upper circumferential portion forming groove, and a lower flange groove is provided above an inner side of the lower circumferential portion forming groove, the lower circumferential portion forming groove having a depth larger than a depth of the intermediate support portion forming groove.
5. The cylindrical roller bearing cage injection mold of claim 3, wherein the female mold is provided with a projecting ring which is located at a middle position of the upper circumferential portion forming groove and which projects into the upper circumferential portion forming groove.
6. The injection molding mold for the cylindrical roller bearing retainer according to any one of claims 1 to 4, wherein the female mold is provided with a plurality of shovel bases adapted to the sliding block, the outer side surface of the sliding block is a first inclined surface which is gradually inclined inward from bottom to top, the inner side surface of the shovel base is a second inclined surface which is gradually inclined inward from bottom to top, and the second inclined surface is attached to the first inclined surface; the female die is provided with a plurality of inclined guide pillars corresponding to the sliding block, the sliding block is provided with inclined insertion holes, the inclined guide pillars are inserted into the inclined insertion holes from the upper portion, and the inclined direction of the inclined guide pillars is the same as that of the first inclined plane.
7. The injection molding die for the cylindrical roller bearing cage according to claim 6, wherein the male die comprises a fixing plate, a through hole for passing through by an injection molding machine pushing mechanism is provided on the fixing plate, die legs are provided on both sides of the fixing plate, a backing plate is mounted on the upper portions of the die legs, and a male die plate is mounted on the upper portions of the backing plate.
8. The cylindrical roller bearing retainer injection molding die of claim 7, wherein the plurality of ejector pins are divided into long ejector pins and short ejector pins according to different lengths, the long ejector pins are located at a middle position, and the short ejector pins are located at a peripheral position; the thimble plate group comprises a lower top plate and an upper top plate, the lower portion of the thimble is connected to the lower top plate, the thimble penetrates through the upper top plate, the upper top plate is connected with a return pin, the lower portion of the return pin is installed at the bottom of the upper top plate, the upper portion of the return pin extends into the male template, a second spring sleeve is sleeved on the return pin, and the second spring is located between the male template and the upper top plate.
9. The injection mold for cylindrical roller bearing cages according to claim 8, wherein the male mold is provided with a stopper post capable of stopping the upper portion of the upper top plate, and the fixing plate is provided with an induction device.
10. An injection molding method of a cylindrical roller bearing cage, characterized by using the injection molding die of the cylindrical roller bearing cage according to any one of claims 1 to 9, further comprising the steps of:
A1. injecting the plastic into the injection main channel through an injection molding machine, and entering the injection molding cavity through the injection sub-channel;
A2. the cylindrical roller bearing retainer is molded in the injection molding cavity, and the material handle is molded in the injection molding main channel and the injection molding branch channel;
A3. and (3) detaching the female die, providing a driving force for the ejector pin plate group from the bottom, upwards pushing the ejector pin plate group, further pushing the ejector pin to ascend, upwards pushing the formed cylindrical roller bearing retainer and the material handle by the ejector pin, and then resetting the ejector pin plate group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210520256.XA CN115008694A (en) | 2022-05-13 | 2022-05-13 | Injection molding mold and molding method for cylindrical roller bearing retainer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210520256.XA CN115008694A (en) | 2022-05-13 | 2022-05-13 | Injection molding mold and molding method for cylindrical roller bearing retainer |
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| CN115008694A true CN115008694A (en) | 2022-09-06 |
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| CN202210520256.XA Pending CN115008694A (en) | 2022-05-13 | 2022-05-13 | Injection molding mold and molding method for cylindrical roller bearing retainer |
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