CN111673983A - Forming die structure of staggered-tooth clamping ring plastic part - Google Patents
Forming die structure of staggered-tooth clamping ring plastic part Download PDFInfo
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- CN111673983A CN111673983A CN202010416243.9A CN202010416243A CN111673983A CN 111673983 A CN111673983 A CN 111673983A CN 202010416243 A CN202010416243 A CN 202010416243A CN 111673983 A CN111673983 A CN 111673983A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 68
- 239000004033 plastic Substances 0.000 title claims abstract description 68
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 9
- 239000002356 single layer Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
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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
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
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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
-
- 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
- B29C45/44—Removing or ejecting moulded articles for undercut articles
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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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
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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
- B29L2031/44—Furniture or parts thereof
- B29L2031/443—Chairs
Abstract
The invention relates to a forming die structure of a staggered-tooth snap ring plastic part, which comprises a fixed die plate, a movable die plate, a stripper plate and a panel, wherein the stripper plate and the panel are arranged above the fixed die plate; the bottom of the movable template is provided with a template foot and a bottom plate, a demoulding mechanism is arranged below the movable template, and the demoulding mechanism is suitable for ejecting the staggered-tooth clamping ring plastic part. The demoulding mechanism comprises an inclined top type sliding block sub-mechanism, an ejection sub-mechanism of the inclined top type sliding block and a core warping plate ejection sub-mechanism, and the warping plate mechanism is driven to completely eject the plastic part so as to realize automatic demoulding. The mechanism has ingenious conception and reasonable arrangement of parts, can effectively simplify the structure of the die and reduce the manufacturing cost of the die.
Description
Technical Field
The invention relates to the field of plastic part injection molding, in particular to a forming mold structure of a staggered-tooth clamping ring plastic part.
Background
FIG. 1a and FIG. 1b show the error of the adjustable seat lifter of a new ambulanceThe tooth snap ring part is formed by ABS plastic injection molding. The main body of the staggered-tooth snap ring has an outer diameter of
The total height of the conical ring is 8mm, and the average wall thickness is 2 mm; the inner wall of the conical table is smooth, 24 clamping teeth are arranged on the outer wall of the conical table, the clamping teeth are of two types with different sizes, one type is clamping teeth with the width of 3mm, the single-layer thickness of 1mm and three layers, and the clamping teeth are respectively characterized by 01-12 shown in figure 1 a. One is a single layer of latch teeth 01 'to 12' with a width of 2mm and a thickness of 1 mm. The single three-layer latch and the single-layer latch are arranged at intervals of 15 degrees of the circumference, the circumference between the three-layer latch and the three-layer latch is arranged at 30 degrees, and the radial depth of the latch is 1 mm. The mold design difficulty of the plastic part is two aspects by combining the shape characteristics of the plastic part, wherein one aspect is the pouring of the plastic part, and the other aspect is the demolding of 24 clamping teeth on the outer wall of the plastic part.
At present, in the field of moulding plastics, the processing of this wrong tooth snap ring is accomplished to a set of complete mould structure high efficiency yet, consequently, a shaping die structure to a piece processing is moulded to this wrong tooth snap ring is awaited urgent emergence.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a forming die structure of a staggered-tooth clamping ring plastic part.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a forming die structure of a staggered-tooth clamping ring plastic part comprises a fixed die plate, a movable die plate, a stripper plate and a panel, wherein the stripper plate and the panel are arranged above the fixed die plate;
the bottom of the movable template is provided with a template foot and a bottom plate, a demoulding mechanism is arranged below the movable template, and the demoulding mechanism is suitable for ejecting the staggered-tooth clamping ring plastic part.
Further, the cavity insert is cooled by a ring groove type water path, and the water path is sealed by a sealing ring.
Furthermore, the demoulding mechanism comprises an inclined top type sliding block sub-mechanism, an ejection sub-mechanism of the inclined top type sliding block and a core warping plate ejection sub-mechanism, and the number of the inclined top type sliding block sub-mechanisms is 12.
Furthermore, the pitched roof type sliding block sub-mechanism comprises a pitched roof type sliding block, a sliding block guide block and a sliding block insert, wherein the sliding block guide block is fixedly installed in a groove formed in the movable template through a screw, a T-shaped rib is arranged on the sliding block guide block, the T-shaped rib is in sliding fit with a T-shaped groove formed in the pitched roof type sliding block and used for guiding the upward oblique movement of the pitched roof type sliding block, and a limit screw is arranged at the upper end of the sliding block guide block to prevent the pitched roof type sliding block from slipping off from the sliding block guide block.
Furthermore, the ejector mechanism of the inclined ejector type sliding block comprises an integral annular ejector plate ring ejector ring and four push rods, the upper ends of the push rods are fixedly connected with the ejector ring through screws, the lower ends of the push rods are installed on the ejector plate, and the ejector ring is ejected upwards through the upward ejection of the ejector plate and the ejector push plate.
Further, the core wane ejector mechanism includes kicking block, wane pillar, wane, wear-resisting button head, pushes away material mold insert spring, pushes away a core, the upper end disc that pushes away a core is the shaping core that the wrong tooth snap ring moulded the piece, the lower extreme sets up to cylindrical rod-like handle, the lower extreme suit of handle is in the direction cylinder piece, after the certain length of pushing away material mold insert spring of precompression of handle bottom suit, restrict the locking by wear-resisting button head to the spring again, the bottom surface of the cylinder groove that the movable mould backing plate corresponds to seting up is withstood to the upper end that pushes away the material mold insert spring.
Further, the wear-resistant round head is made of a high-strength and wear-resistant T8A material.
Further, the wane passes through the cylinder rotating pin and installs on the wane pillar, and the wane revolutes the rotating pin and rotates, and the wane left end is compressed tightly by wear-resisting button head and is hugged closely on thimble panel, and its right-hand member is 7mm apart from the lower extreme of kicking block, and the kicking block passes through the screw fastening and installs on the lower bottom surface of movable mould backing plate.
Furthermore, the bottom of the movable mold base plate is provided with a reset rod, a reset rod spring is sleeved on the reset rod, the reset rod penetrates through the ejector pin panel and the ejector pin push plate, an ejector pin plate guide pillar is arranged on the ejector pin panel, an ejector pin plate guide sleeve is sleeved on the ejector pin plate guide pillar, a garbage nail is arranged at the bottom of the ejector pin push plate, and an anti-falling cushion block is arranged at the bottom of the movable mold base plate;
the fixed die plate is provided with an auxiliary guide pillar, an auxiliary guide sleeve, a fixed die plate guide sleeve, a stripper plate guide sleeve and a main guide pillar, the panel is provided with a stripper plate pull rod, the fixed die plate is provided with a resin shutter, the fixed die plate and the movable die plate are provided with a fixed die plate pull rod, and the die legs are provided with support pillars.
Further, the top end face of the staggered-tooth clamping ring plastic part is provided with two point gates G1 and G2 for pouring, the staggered-tooth clamping ring plastic part is provided with 24 clamping teeth, the 24 clamping teeth are spaced ring teeth, each clamping tooth comprises 12 three-layer clamping teeth and 12 single-layer clamping teeth, and the three-layer clamping teeth and the single-layer clamping teeth are staggered.
The invention has the beneficial effects that: aiming at the problem of difficulty in pouring of the plastic part, the single cavity is provided with two point gates to finish pouring of the circular plastic part. The problem of difficult demoulding of 24 clamping teeth on the outer wall of a plastic part with staggered-tooth clamping rings is solved, a composite demoulding mechanism is designed to realize automatic demoulding of the plastic part, in the mechanism, ejection through an ejector plate is realized, four ejector rods are synchronously pushed to push an ejection ring so as to complete 12 pitched roof type sliding blocks to demould 24 clamping teeth on the side surface, meanwhile, a warping plate type mechanism is driven to synchronously eject a forming core of the plastic part, the first ejection and side demoulding actions of the plastic part are completed, then ejection is continued through the ejector plate, and the plastic part is completely ejected through the driving warping plate mechanism so as to realize automatic demoulding. The mechanism has ingenious conception and reasonable arrangement of parts, can effectively simplify the structure of the die and reduce the manufacturing cost of the die.
Drawings
FIG. 1a is a schematic structural view of a molded part of a staggered-tooth snap ring processed according to the present invention;
FIG. 1b is a schematic cross-sectional view of a machined interlocking teeth snap ring plastic part of the present invention;
FIG. 2 is a design drawing showing the parting of the molding cavity of the plastic part with staggered teeth and snap rings of the present invention;
FIG. 3 is a side schematic view of FIG. 2;
FIG. 4 is a top view of the moving mold of the present invention;
FIG. 5 is a bottom view of the stationary mold of the present invention;
FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 4;
fig. 7 is a schematic cross-sectional view taken along line B-B in fig. 4.
Detailed Description
For the difficulty in forming the staggered-tooth snap ring plastic part, as shown in fig. 2, for the first difficult problem of forming a pouring system, because the inner wall has assembly requirements, the assembly effect cannot be influenced due to the existence of gate traces, and because the outer wall has 24 snap teeth, a side core-pulling mechanism needs to be arranged, the gate is not convenient to form, so that the gate can be formed only on the upper end surface and can be formed only in a point gate manner; the plastic part is a thin-wall annular plastic part, and the single gate is difficult to ensure the mold filling performance of the plastic part according to the size of the plastic part, so two point gates G1 and G2 are arranged on the top end surface of the plastic part for pouring. For the second difficulty, as for demolding of 24 latches, because demolding of annular side features is involved, the core-pulling demolding directions of the features are different, and 24 latches are spaced ring teeth, so that core pulling is implemented by using two simplified half sliders, the scheme is not feasible, only two sets of two single latches of two different latches can be combined together, and core-pulling demolding is implemented by using one side slider, obviously, for core-pulling demolding of the outer ring latch of the plastic part, 12 side core-pulling sliders need to be designed for core-pulling demolding. Wherein X1-X12 are serial numbers of the inclined top type sliding block mechanisms; P1-P4 are joint numbers.
Based on the above analysis, the parting design of the molding cavity of the plastic part is as shown in fig. 2 and fig. 3, and a P1 parting surface is adopted as a main parting surface of the plastic part, so as to ensure that the inclined top type sliding block mechanisms for side core pulling are all positioned on one side of the movable mold of the mold, thus facilitating the design and installation of the demolding mechanism and simplifying the mold structure. A P4 surface is used as a parting surface of an inner wall, P2 and P3 are used as parting surfaces of a molded piece with a set of characteristics, and 12 inclined top type sliders X1-X12 are divided. And one slider of the 12 pitched roof type sliders is used for completing side core-pulling and demolding of 1 three-layer latch and 1 single-layer latch.
After the pouring and demolding scheme for molding the plastic part is determined, the overall scheme of the mold can be basically determined, and the overall structural design of the mold of the plastic part is as follows.
As shown in fig. 4 to 7, in the design of the structure, the overall structure and the layout of the forming mold for the plastic part with the staggered-tooth snap ring, the basic structure of the mold adopts a three-plate type spot pouring gate structure in consideration of the requirement of the arrangement of a spot pouring gate system for the plastic part. The mold cavity layout is combined with the production requirement of the plastic part, and the mold cavity layout is arranged as 1 mold and 2 cavities.
The die comprises a fixed die plate 3, a movable die plate 4, a stripper plate 2 and a panel 1 which are arranged above the fixed die plate 3, wherein a cavity insert 22 is arranged in the fixed die plate 3, the side surface of the cavity insert 22 is provided with a pushing pin 26 and a pushing spring 25 which are matched with each other, the top of the cavity insert 22 is provided with a material pulling rod 23, the top of the cavity insert 22 is provided with a cavity insert locking block 27, the panel 1 is provided with a flange sprue bush 28, and the bottom of the flange sprue bush 28 is provided with a runner insert 29;
the bottom of the movable template 4 is provided with a template foot 6 and a bottom plate 7, a demoulding mechanism is arranged below the movable template 4, and the demoulding mechanism is suitable for ejecting the staggered-tooth clamping ring plastic part.
The cooling mainly cools the cavity insert 22, and due to the structural size, other formed parts are difficult to be provided with water channels, the cavity insert 22 is cooled by a ring groove water channel, and the water channel is sealed by a sealing ring 24.
Further, the demoulding mechanism comprises an inclined top type sliding block sub-mechanism, an ejection sub-mechanism of the inclined top type sliding block and a core warping plate ejection sub-mechanism, and the number of the inclined top type sliding block sub-mechanisms is 12.
In 12 pitched-roof-type sliding block sub-mechanisms on the outer wall, taking a single mechanism as an example, the pitched-roof-type sliding block sub-mechanism comprises a pitched-roof-type sliding block 42, a sliding block guide block 43 and a sliding block insert 44, wherein the sliding block guide block 43 is fixedly installed in a groove formed in the movable template 4 through a screw, a T-shaped rib is arranged on the sliding block guide block, the T-shaped rib is in sliding fit with a T-shaped groove formed in the pitched-roof-type sliding block 42 and used for guiding the upward oblique movement of the pitched-roof-type sliding block 42, and a limit screw is arranged at the upper end of the sliding block guide block 43 to prevent the pitched-roof-type sliding.
The ejector mechanism of the inclined ejector type sliding block comprises an integral annular ejector plate ring ejector ring 41 and four push rods 39, wherein the upper ends of the push rods 39 are fixedly connected with the ejector ring 41 through screws, the lower ends of the push rods 39 are arranged on the ejector pin panel 10, and the ejector ring 41 is ejected upwards through the upward ejection of the ejector pin panel 10 and the ejector pin ejector plate 11.
The core rocker ejector mechanism comprises an ejector block 34, a rocker support 35, a rocker 36, a wear-resistant round head 37, a pushing insert spring 38 and a pushing core 40, wherein an upper end disc of the pushing core 40 is a molding core of a staggered-tooth snap ring plastic part, the lower end of the pushing core is provided with a cylindrical rod-shaped handle, the lower end of the handle is sleeved in the guide cylindrical block 21, the bottom end of the handle is sleeved with the pushing insert spring 38 with a certain pre-compressed length, the spring is limited and locked by the wear-resistant round head 37, and the upper end of the pushing insert spring 38 abuts against the bottom surface of a cylindrical groove correspondingly formed in the movable die base plate 5. The wear-resistant round head 37 is made of a high-strength and wear-resistant T8A material.
The rocker 36 is installed on the rocker pillar 35 through a cylindrical rotating pin, the rocker 36 rotates around the rotating pin, the left end of the rocker 36 is tightly pressed by a wear-resistant round head 37 and tightly attached to the thimble panel 10, the distance between the right end of the rocker and the lower end of the ejector block 34 is 7mm, and the ejector block 34 is installed on the lower bottom surface of the movable die base plate 5 through screw fastening. The bottom of the movable die base plate 5 is provided with a reset rod 9, a reset rod spring 8 is sleeved on the reset rod 9, the reset rod 9 penetrates through the ejector pin panel 10 and the ejector pin push plate 11, an ejector pin plate guide pillar 12 is arranged on the ejector pin panel 10, an ejector pin plate guide sleeve 13 is sleeved on the ejector pin plate guide pillar 12, a garbage nail 14 is arranged at the bottom of the ejector pin push plate 11, and an anti-falling cushion block 15 is arranged at the bottom of the movable die base plate 5;
in addition, the fixed die plate 3 is provided with an auxiliary guide post 16, an auxiliary guide sleeve 17, a fixed die plate guide sleeve 18, a stripper plate guide sleeve 19 and a main guide post 20, the panel 1 is provided with a stripper plate pull rod 30, the fixed die plate 3 is provided with a resin shutter 31, a fixed die plate pull rod 32 is arranged between the fixed die plate 3 and the movable die plate 4, and the die feet 6 are provided with support posts 33.
The core wane ejector mechanism has the main functions of: when the ejector pin panel 10 and the ejector pin push plate 11 are ejected upwards by the ejector pin of the injection molding machine, the pushing rocker support 35 and the rocker 36 are ejected upwards synchronously, and as the rocker 36 is in contact with the ejector pin panel 10 and the wear-resistant round head 37, the combination of the wear-resistant round head 37 and the push piece core 40 is ejected upwards by the ejector pin panel 10 by overcoming the tension of the push insert spring 38, so that a plastic piece is pushed to be ejected, which is the first ejection of the mechanism. When the ejection distance exceeds 7mm, the right end of the wane 36 is blocked by the ejector block 34 to generate a lever effect, and due to the action of a lever arm, the left end of the wane 36 can accelerate to eject the combination of the wear-resistant round head 37 and the ejector core 40, so that the secondary ejection action of the sub-mechanism is realized.
Accordingly, the total demoulding action process of the special demoulding mechanism for the plastic part is as follows: the total demolding process is carried out in two steps, in the first step, after a P3 parting surface of a mold is opened, ejector rods of an injection molding machine push ejector pin panel 10 and an ejector pin push plate 11 to eject out, so that push rods 39 and a warping plate 36 are ejected upwards synchronously, four leg rods 39 push an ejection ring 41 to eject upwards, the ejection ring 41 pushes 12 pitched ejection type sliding blocks 42 to eject upwards obliquely along a sliding block guide block 43, the 12 pitched ejection type sliding blocks 42 are ejected at the same side, side core-pulling demolding of 24 clamping teeth and the outer wall of a plastic part is completed, and the ejection distance is 7 mm. In synchronism with this, the ejector core 40 is also ejected, which synchronizes the movement of the ejector slide 12 with the mold opening direction. After this step is completed, the ejector block 34 blocks the right end of the rocker 36, the ejector plate (the ejector pin panel 10 and the ejector pin push plate 11) continues to move upward, the left end of the rocker 36 is forced to drive the ejector core 40 to continue ejecting, and the final demolding of the plastic part is completed, which is the second step.
The working principle of the die is as follows: the mold is opened in a three-time parting manner, the opening sequence is PL1 → PL 2-PL 3, and after the mold is opened, the ejector rod of the injection molding machine pushes the ejector plates (the ejector pin panel 10 and the ejector pin push plate 11) to drive the rocker type secondary ejection demolding and circumferential inclined ejection sliding block side core-pulling demolding composite mechanism to perform automatic demolding of the plastic part. When the composite demolding mechanism is reset, the process is just opposite to the mold opening process, the ejector plate is reset firstly, the composite demolding mechanism is driven to reset firstly, and then the mold is reset and closed according to the sequence of PL3 → PL2 → PL 1.
Aiming at the problem of difficulty in pouring of the plastic part, the single cavity is provided with two point gates to finish pouring of the circular plastic part. The problem of difficult demoulding of 24 clamping teeth on the outer wall of a plastic part with staggered-tooth clamping rings is solved, a composite demoulding mechanism is designed to realize automatic demoulding of the plastic part, in the mechanism, ejection through an ejector plate is realized, four ejector rods are synchronously pushed to push an ejection ring so as to complete 12 pitched roof type sliding blocks to demould 24 clamping teeth on the side surface, meanwhile, a warping plate type mechanism is driven to synchronously eject a forming core of the plastic part, the first ejection and side demoulding actions of the plastic part are completed, then ejection is continued through the ejector plate, and the plastic part is completely ejected through the driving warping plate mechanism so as to realize automatic demoulding. The mechanism has ingenious conception and reasonable arrangement of parts, can effectively simplify the structure of the die and reduce the manufacturing cost of the die.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A forming die structure of staggered-tooth clamping ring plastic parts comprises a fixed die plate (3), a movable die plate (4), a stripper plate (2) and a panel (1) which are arranged above the fixed die plate (3), and is characterized in that a cavity insert (22) is arranged in the fixed die plate (3), a pushing pin (26) and a pushing spring (25) which are matched with each other are arranged on the side surface of the cavity insert (22), a material pulling rod (23) is arranged at the top of the cavity insert (22), a cavity insert locking block (27) is arranged at the top of the cavity insert (22), a flange sprue bush (28) is arranged on the panel (1), and a runner insert (29) is arranged at the bottom of the flange sprue bush (28);
the bottom of the movable template (4) is provided with a template foot (6) and a bottom plate (7), a demoulding mechanism is arranged below the movable template (4), and the demoulding mechanism is suitable for ejecting the staggered-tooth clamping ring plastic part.
2. The structure of a forming die for a staggered tooth snap ring plastic part as claimed in claim 1, wherein the cavity insert (22) is cooled by a ring groove type water path, and the water path is sealed by a sealing ring (24).
3. The structure of a forming die for a staggered-tooth snap ring plastic part according to claim 1 or 2, wherein the demolding mechanism comprises a pitched roof type slide block sub-mechanism, a pitched roof type slide block ejection sub-mechanism and a core wane ejection sub-mechanism, and the number of the pitched roof type slide block sub-mechanisms is 12.
4. The forming die structure of a staggered tooth snap ring plastic part according to claim 3, wherein the pitched roof type slide block mechanism comprises a pitched roof type slide block (42), a slide block guide block (43) and a slide block insert (44), the slide block guide block (43) is fixedly arranged in a groove formed in the movable die plate (4) through a screw, a T-shaped rib is arranged on the slide block guide block, the T-shaped rib is in sliding fit with the T-shaped groove formed in the pitched roof type slide block (42) and used for guiding the upward oblique movement of the pitched roof type slide block (42), and a limit screw is arranged at the upper end of the slide block guide block (43) to prevent the pitched roof type slide block (42) from slipping off the slide block guide block (43).
5. The forming die structure of a staggered-tooth clamp ring plastic part according to claim 4, wherein the ejection sub-mechanism of the inclined-ejection type sliding block comprises an integral annular ejector plate ring ejection ring (41) and four push rods (39), the upper ends of the push rods (39) are tightly connected with the ejection ring (41) through screws, the lower ends of the push rods (39) are installed on the ejector pin panel (10), and the ejection ring (41) is ejected upwards through upward ejection of the ejector pin panel (10) and the ejector pin push plate (11).
6. The forming die structure of a staggered-tooth snap ring plastic part according to claim 5, wherein the core-rocker ejection sub-mechanism comprises an ejector block (34), a rocker support column (35), a rocker (36), a wear-resistant round head (37), a material pushing insert spring (38) and a push piece core (40), an upper end disc of the push piece core (40) is a forming core of the staggered-tooth snap ring plastic part, the lower end of the push piece core is a cylindrical rod-shaped handle, the lower end of the handle is sleeved in the guide cylindrical block (21), after the material pushing insert spring (38) with a certain length is sleeved at the bottom end of the handle, the spring is limited and locked by the wear-resistant round head (37), and the upper end of the material pushing insert spring (38) abuts against the bottom surface of a cylindrical groove correspondingly formed in the movable die base plate (5).
7. The structure of a forming die for a staggered tooth snap ring plastic part as claimed in claim 5, wherein the wear-resistant round head (37) is made of a high-strength and wear-resistant T8A material.
8. The forming die structure of a staggered tooth snap ring plastic part according to claim 5, characterized in that, the rocker (36) is installed on the rocker pillar (35) through a cylindrical rotating pin, the rocker (36) rotates around the rotating pin, the left end of the rocker (36) is pressed tightly by a wear-resistant round head (37) and tightly attached to the thimble panel (10), the distance between the right end of the rocker and the lower end of the top block (34) is 7mm, and the top block (34) is installed on the lower bottom surface of the movable die base plate (5) through a screw fastening.
9. The forming die structure of a staggered-tooth snap ring plastic part according to claim 6, wherein a reset rod (9) is arranged at the bottom of the movable die backing plate (5), a reset rod spring (8) is sleeved on the reset rod (9), the reset rod (9) penetrates through the ejector pin panel (10) and the ejector pin push plate (11), an ejector pin plate guide post (12) is arranged on the ejector pin panel (10), an ejector pin plate guide sleeve (13) is sleeved on the ejector pin plate guide post (12), a garbage nail (14) is arranged at the bottom of the ejector pin push plate (11), and an anti-falling cushion block (15) is arranged at the bottom of the movable die backing plate (5);
the fixed die plate (3) is provided with an auxiliary guide post (16), an auxiliary guide sleeve (17), a fixed die plate guide sleeve (18), a stripper plate guide sleeve (19) and a main guide post (20), the panel (1) is provided with a stripper plate pull rod (30), the fixed die plate (3) is provided with a resin shutter (31), a fixed die plate pull rod (32) is arranged between the fixed die plate (3) and the movable die plate (4), and the die feet (6) are provided with support columns (33).
10. The structure of a forming mold for a staggered teeth snap ring plastic part as claimed in claim 1, wherein two point gates G1 and G2 are provided on the top end face of the staggered teeth snap ring plastic part for casting, the staggered teeth snap ring plastic part has 24 snap teeth, the 24 snap teeth are spaced ring teeth, the snap teeth include 12 three-layer snap teeth and 12 single-layer snap teeth, and the three-layer snap teeth and the single-layer snap teeth are staggered.
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| CN202010416243.9A CN111673983A (en) | 2020-05-17 | 2020-05-17 | Forming die structure of staggered-tooth clamping ring plastic part |
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| CN202010416243.9A CN111673983A (en) | 2020-05-17 | 2020-05-17 | Forming die structure of staggered-tooth clamping ring plastic part |
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