CN110126222B - Novel runner structure mold and injection molding method thereof - Google Patents
Novel runner structure mold and injection molding method thereof Download PDFInfo
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- CN110126222B CN110126222B CN201910284808.XA CN201910284808A CN110126222B CN 110126222 B CN110126222 B CN 110126222B CN 201910284808 A CN201910284808 A CN 201910284808A CN 110126222 B CN110126222 B CN 110126222B
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- sleeve
- runner
- thimble
- sliding block
- push rod
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 21
- 238000000465 moulding Methods 0.000 claims abstract description 27
- 230000000630 rising effect Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
- 230000001174 ascending effect Effects 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000009189 diving Effects 0.000 claims description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- 230000008569 process Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4435—Removing or ejecting moulded articles for undercut articles using inclined, tiltable or flexible undercut forming elements driven by the ejector means
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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 discloses a novel runner structure mold, which comprises an upper mold and a lower mold assembly, wherein the lower mold assembly comprises a sliding block; a cavity and a runner are arranged between the upper die and the sliding block; the runner comprises a main runner and at least two sub-runners; the lower die assembly further comprises a sleeve, the sliding block is provided with a through hole for connecting the sleeve, the upper end of the sleeve is connected to the runner, and the shaft diameter of the upper end of the sleeve is smaller than that of the middle of the sleeve; the thimble is inserted in the sleeve, and can protrude out of the sleeve when the thimble rises, and the rising of the thimble is used for driving the runner to be far away from the sliding block. After injection molding is finished, the runner molding piece wraps the sleeve, the structure is better, after injection molding is finished, the runner molding piece is stably and firmly sleeved at the upper end of the sleeve, the runner molding piece is prevented from being stuck on a mold to damage a product when the upper mold is opened, and the runner molding piece is prevented from slipping to damage the product when being ejected; the product and the runner forming part are automatically divided when the thimble continues to push up by matching with the stroke of the sleeve, and the runner forming part is automatically separated from the sleeve.
Description
Technical Field
The invention relates to a mold, in particular to a novel runner structure mold and an injection molding method thereof.
Background
In the traditional arrangement, the runner molding part is easy to stick to a mold, and the runner molding part is easy to slip when being ejected out to damage a product; when the runner forming part is provided with a longer rubber column, rubber is wasted, the cost is increased, the environment is not protected, and the problem of viscose powder is easily generated.
Disclosure of Invention
In order to overcome the defects of the prior art and solve the problems that a runner molding piece is not easy to eject and a product is easy to damage, the invention adopts the following technical scheme:
an injection molding method, step a, the upper die and the lower die assembly are assembled;
step b, filling materials through a glue injection port, wherein the materials are filled along a main runner and are poured into a cavity through a split runner; the sliding block is provided with a through hole for connecting the sleeve, the upper end of the sleeve is connected to the flow channel, the shaft diameter of the upper end of the sleeve is smaller than that of the middle part of the sleeve, and a space is formed between the upper end of the sleeve and the through hole; when the cavity injection molding is completed, the space is filled with materials, and part of the materials form a lantern ring at the upper end part of the inverted buckle sleeve;
step c, the upper die is upwards far away from the die to open the die;
the sleeve is inserted with a lifting thimble, and the thimble can extend out of the sleeve when lifting; step d, the movable piece drives the thimble to ascend, the thimble jacks up the runner molding piece, the connection between the molded product and the runner molding piece is cut off, and the sleeve ring part of the runner molding piece drives the sleeve to ascend synchronously;
the die is provided with a limiting structure for limiting the ascending travel of the sleeve; step d, when the limiting structure locks the ascending of the sleeve, the part of the sleeve, which is connected with the lantern ring, is higher than the sliding block; step e, the limiting structure locks the ascending of the sleeve, the thimble drives the runner forming piece to continuously ascend, and the runner forming piece gradually breaks away from the upper end of the sleeve;
f, the lower end of the second flange of the push rod is abutted against the lower end of the second hollow hole, the movable piece drives the thimble and the push rod to ascend, and the thimble and the slide block ascend synchronously; step g, pushing the product on the ejector rod, so that the product is separated from the sliding block, and taking the product away; and d, in the steps of g, removing the runner molding piece after the runner molding piece is separated from the sliding block.
According to another embodiment of the present invention, further, the shaft diameter of the output end of the sub-channel is gradually reduced along the material flow direction.
According to another embodiment of the present invention, further, the shape of the output end of the sub-runner is one of a ox horn shape, a diving port and a cone shape.
According to another specific embodiment of the invention, further, the diversion channel sequentially comprises a horizontal flow channel and an inclined flow channel along the material flow direction; the inclined runner is used for feeding materials to the cavity obliquely downwards; the inclined runner is communicated with the lower side of the output end of the horizontal runner; the upper side of the output end of the horizontal flow channel is provided with a convex angle.
According to another embodiment of the invention, further, the upper end of the sleeve is provided with a recess; the opening direction of the concave part is upward; the thimble can be protruded out of the bottom surface of the concave part when rising.
According to another specific embodiment of the invention, two flow dividing channels are arranged, the concave parts are U-shaped notches or V-shaped notches, and two branch angles are formed at the upper end part of the sleeve; and when the mold is closed, the upper end of the support angle is abutted against the upper mold.
A novel runner structure mold comprises an upper mold and a lower mold assembly, wherein the lower mold assembly comprises a sliding block; the connecting position between the upper die and the sliding block; a cavity and a runner are arranged; the runner comprises a main runner arranged at the upper end of the runner and at least two diversion runners arranged in the lateral direction, the main runner is communicated with a glue injection port, one end, far away from the main runner, of the diversion runner is communicated with a cavity, and the cavity is correspondingly arranged with the diversion runner; the sliding block is provided with a through hole for connecting the sleeve, the upper end of the sleeve is connected to the flow passage, and the shaft diameter of the upper end of the sleeve is smaller than that of the middle of the sleeve; the thimble is inserted into the sleeve, the thimble can extend out of the sleeve when rising, the lower die substrate is provided with a limiting structure for limiting the rising stroke of the sleeve, and the rising of the thimble is used for driving the runner forming part to be far away from the product and for driving the runner forming part to be separated from the sleeve; the sliding block is connected with a push rod, the push rod is used for driving the sliding block to ascend, and the push rod and the thimble are connected with the same movable piece; the movable part is provided with a clearance space for delaying the push rod to rise, and the push rod rises later than the thimble.
According to another specific embodiment of the invention, a first flange is arranged at the middle part or the lower end of the sleeve, the limiting structure is a first hollow hole which is arranged on the lower die base plate and used for accommodating sliding of the first flange, and the sleeve protrudes upwards from the first hollow hole; the middle part or the lower end of the push rod is provided with a second flange, the movable piece is provided with a second hollow hole for accommodating sliding of the second flange, and the push rod protrudes upwards from the second hollow hole to extend out of the movable piece; when the upper die and the sliding block are assembled, the distance L between the upper end of the first flange and the upper end of the first hollow hole 1 Distance L between the lower end of the second flange and the lower end of the second hollow hole 2 And L is 1 <L 2 The method comprises the steps of carrying out a first treatment on the surface of the The interval between the lower end of the second flange and the lower end of the second hollow hole is used as a clearance space for the push rod to act, and when the lower end of the second flange is abutted to the lower end of the second hollow hole, the movable piece can drive the push rod to ascend.
According to another embodiment of the present invention, further, the lower mold base plate includes an upper base plate and a lower base plate detachably connected, and the first hollow hole is disposed at a connection position between the upper base plate and the lower base plate; the upper base plate and the lower base plate are separated and used for disassembling and assembling the sleeve; when the upper substrate and the lower substrate are separated, the sleeve can be pulled away from the upper substrate and the lower substrate.
According to another embodiment of the present invention, further, the movable member includes an upper plate and a lower plate, and the second center hole is disposed at a connection position between the upper plate and the lower plate; the upper plate and the lower plate are separated and used for disassembling and assembling the push rod; when the upper plate and the lower plate are separated, the push rod can be pulled away from the upper plate and the lower plate.
The novel runner structure mold has the following beneficial effects: after injection molding is finished, the runner molding piece wraps the sleeve, the structure is better, after injection molding is finished, the runner molding piece is stably and firmly sleeved at the upper end of the sleeve, the runner molding piece is prevented from being stuck on a mold to damage a product when the upper mold is opened, and the runner molding piece is prevented from slipping to damage the product when being ejected; the product and the runner forming part are automatically divided when the thimble continues to push up by matching with the stroke of the sleeve, and the runner forming part is automatically separated from the sleeve.
Drawings
FIG. 1 is a schematic diagram of a first state of the mold opening process of the present invention;
FIG. 2 is a schematic diagram of a second state of the mold opening process according to the present invention;
FIG. 3 is a schematic view of a third state of the mold opening process according to the present invention;
FIG. 4 is a schematic diagram of a fourth state of the mold opening process according to the present invention;
FIG. 5 is a schematic view of a fifth state of the mold opening process according to the present invention;
FIG. 6 is a schematic view of a sixth state of the mold opening process according to the present invention;
FIG. 7A is the view of FIG. 1A of the present invention 1 A partial magnified view;
FIG. 7B is a diagram of FIG. 3A of the present invention 2 A schematic structural diagram;
FIG. 7C is the view of FIG. 4A of the present invention 3 A structural schematic;
FIG. 8A is a schematic view of the present inventionB of FIG. 1 1 A partial magnified view;
FIG. 8B is the illustration of FIG. 3B of the present invention 2 A schematic structural diagram;
FIG. 8C is the diagram of FIG. 4B of the present invention 3 A schematic structural diagram;
FIG. 9A is the view C of FIG. 1 of the present invention 1 A partial magnified view;
FIG. 9B is the view of FIG. 3C of the present invention 2 A schematic structural diagram;
FIG. 9C is the illustration of FIG. 4C of the present invention 3 A structural schematic;
FIG. 10 is a schematic view of a first view structure of a flow channel according to the present invention;
FIG. 11 is a schematic view of a second view structure of the flow channel according to the present invention;
fig. 12 is a schematic structural view of the sleeve of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
As shown in fig. 1 to 6, 7A to 7C and 8A to 8B, a novel runner structure mold comprises an upper mold 1 and a lower mold assembly, wherein the lower mold assembly comprises a sliding block 2; the connecting position between the upper die 1 and the sliding block 2; a cavity 4 and a runner are arranged; the runner 13 comprises a main runner 13b arranged at the upper end of the runner and at least two diversion runners arranged in the lateral direction, the main runner 13b is communicated with a glue injection port 13a, one end of the diversion runner, which is far away from the main runner 13b, is communicated with a cavity 4, and the cavity 4 is correspondingly arranged with the diversion runners; the sliding block 2 is provided with a through hole for connecting the sleeve, the upper end of the sleeve 5 is connected to the flow channel 13, and the shaft diameter of the upper end of the sleeve 5 is smaller than that of the middle of the sleeve 5; the thimble 6 is inserted in the sleeve 5, the thimble 6 can protrude out of the sleeve 5 when rising, and the rising of the thimble 6 is used for driving the runner 13 to be far away from the sliding block 2.
The upper end of the sleeve 5 is connected to the flow channel 13, and the shaft diameter of the upper end of the sleeve 5 is smaller than that of the middle part of the sleeve 5. During injection molding, the space between the upper end of the sleeve and the inner wall of the through hole is filled with glue to obtain a lantern ring at the upper end of the inverted sleeve, so that the inverted structure is good, and the sliding of the runner forming part during ejection is prevented; the travel of the sleeve 5 is matched, so that the product and the runner forming part are automatically divided, and the runner forming part is automatically separated from the sleeve 5. Preferably, the upper end of the sleeve is provided with a concave part, and a lantern ring and a rubber column are formed after injection molding is completed; the back-off mechanism has better fastening effect and can better slide when the runner forming part is ejected out.
The main flow channel 13b is conical or columnar; the small end of the conical main runner is connected with the glue injection port. The shaft diameter of the output end of the sub-runner gradually becomes smaller along the material flow direction. The shape of the output end of the sub-runner is one of a ox horn shape, a diving port and a cone shape. As shown in fig. 1 to 6, 10 and 11, the split flow path includes a horizontal flow path 13c and an inclined flow path 13d in this order in the material flow direction; the inclined runner 13d is used for feeding materials downwards to the cavity 4 in an inclined way; the inclined flow channel 13d is communicated with the lower side position of the output end of the horizontal flow channel 13 c; the upper side of the output end of the horizontal flow channel 13c is provided with a convex angle 13e. During injection molding, a certain buffer area can be formed at the convex angle 13e.
As shown in fig. 12, the upper end portion of the sleeve 5 is provided with a recess 5b; the opening direction of the concave part 5b is upward; the ejector pin 6 can protrude out of the bottom surface of the concave part 5b when rising. The concave portion 5b is a notch, at least three support angles are formed at the upper end of the sleeve 5, and the upper ends of the support angles are abutted against the upper die 1. The two sub-runners are provided, the concave part 5b is a U-shaped notch or a V-shaped notch, and two branch angles are formed at the upper end part of the sleeve 5; when the upper die 1 and the slide block 2 are assembled, the upper end of the support angle is abutted against the upper die 1.
As shown in fig. 1 to 6 and fig. 7A to 7B, the device further comprises a limiting structure for limiting the ascending travel of the sleeve 5; when the sleeve 5 is lifted in place, the limiting structure locks the lifting of the sleeve 5. The limit structure is arranged on the lower die substrate 8. The lower end of the sleeve 5 is provided with a flange or a bump on the side wall, and the limiting structure is a limiting surface on the die; when the flange or the projection abuts against the limit surface, the sleeve 5 is locked from rising.
As shown in fig. 1 to 6 and 9A to 9C, the sliding block 2 is connected with a push rod 7, and the upper end of the push rod 7 is connected with the sliding block 2 through a screw; the lifting of the push rod 7 is used for driving the slide block 2 to lift.
Preferably, the thimble 6 and the push rod 7 are connected with the same movable piece 3, and a lower die substrate 8 is arranged between the movable piece 3 and the sliding block 2; the middle or lower end of the sleeve 5 is provided with a first flange5a, the limiting structure is a first hollow hole which is arranged on the lower die base plate 8 and used for accommodating the sliding of the first flange 5a, and the sleeve 5 protrudes upwards from the first hollow hole to extend out of the lower die base plate 8 and is inserted into a through hole of the lower die; the middle part or the lower end of the push rod 7 is provided with a second flange, the movable piece 3 is provided with a second hollow hole for accommodating sliding of the second flange, and the push rod 7 protrudes upwards from the second hollow hole to extend out of the movable piece 3; when the upper die 1 and the slide block 2 are clamped, the distance L between the upper end of the first flange 5a and the upper end of the first hollow hole 1 Distance L between the lower end of the second flange and the lower end of the second hollow hole 2 And L is 1 <L 2 The method comprises the steps of carrying out a first treatment on the surface of the The interval between the lower end of the second flange and the lower end of the second hollow hole is used as a clearance space for starting the action of the push rod 7, and when the lower end of the second flange is abutted to the lower end of the second hollow hole, the movable piece 3 can drive the push rod 7 to ascend. Partial enlarged views of the avoidance space are shown in fig. 9A to 9C; partial enlarged views of the stopper structure are shown in fig. 8A to 8B. L (L) 1 The identity of (a) is shown in fig. 1 and 8A; l (L) 2 The identification of (a) is shown in fig. 1 and 9A.
The lower die base plate 8 also serves as a guide for lifting the ejector pin and the push rod, and the sliding block 2 is guided to lift.
The lower die assembly is connected with the first lifting power piece and a corresponding guide structure, such as a cylinder, a hydraulic cylinder, a screw nut pair and a motor structure, wherein the guide structure can be a guide rod, a guide groove, a guide rail and the like.
Comprises a row position block 21 and a push plate 22 which are detachably connected, wherein the row position block 21 and the push plate 22 are arranged up and down, and a push rod is connected with the push plate 22. The upper die is connected with the line block 21 to form a die cavity and a runner; for different products, different upper dies and row blocks 21 are selected, i.e. different cavities and even runners are selected. The lower die comprises a row position block 21 and a push plate 22 which are detachably connected, wherein the corresponding row position block 21 is replaced on the push plate 22, and the corresponding upper die is replaced at the same time.
The movable part is connected with a second lifting power part which can be simply a cylinder body, such as a cylinder and a piston cylinder; as shown in fig. 1 to 6, the second lifting power member may be a screw-nut pair and a motor structure, and the screw is connected with the movable member in a transmission manner.
As shown in fig. 1 to 6, the lower die base plate 8 includes an upper base plate 81 and a lower base plate 82 detachably connected, and a first hollow hole is provided at a connection position between the upper base plate 81 and the lower base plate 82; the upper and lower substrates 81 and 82 are separated for mounting and dismounting the sleeve; when the upper and lower substrates 81 and 82 are separated, the sleeve may be pulled away from the upper and lower substrates 81 and 82.
As shown in fig. 1 to 6, the movable member 3 includes an upper plate 31 and a lower plate 32, and the second hollow hole is provided at a connection position between the upper plate 31 and the lower plate 32; the separation of the upper plate 31 and the lower plate 32 is used for disassembling and assembling the push rod 7; when the upper plate 31 and the lower plate 32 are separated, the push rod 7 can be pulled away from the upper plate 31 and the lower plate 32.
The lower die assembly also comprises a push rod for ejecting the product and a third lifting power piece for driving the push rod to lift.
Fig. 1 to 6 are various views of the mold opening process, and the corresponding partial views include those shown in fig. 7A to 7C, fig. 8A to 8C, and fig. 9A to 9C.
An injection molding process comprising steps a to g. Step a, the upper die 1 and the lower die assembly are matched;
step b, filling materials through a glue injection port 13a, wherein the materials are filled along a main runner 13b and are poured into a cavity 4 through a split runner; the sliding block 2 is provided with a through hole for connecting the sleeve 5, the upper end of the sleeve 5 is connected to the flow channel 13, the shaft diameter of the upper end part of the sleeve 5 is smaller than that of the middle part of the sleeve 5, and a space is formed between the upper end part of the sleeve 5 and the through hole; when the injection molding of the cavity 4 is completed, the space is filled with materials, and part of the materials form a lantern ring at the upper end part of the inverted buckle sleeve;
step c, the lower die assembly is separated downwards to open the die, and the process is shown in fig. 1-2.
The sleeve 5 is inserted with a lifting thimble 6, and the thimble 6 can protrude out of the sleeve 5 when lifting; step d, the movable part 3 drives the thimble 6 to ascend, the thimble 6 jacks up the runner molding part, the connection between the molded product and the runner molding part is cut off, and the sleeve ring part of the runner molding part drives the sleeve 5 to ascend synchronously, and the process is shown in fig. 2 to 3.
The die is provided with a limiting structure for limiting the ascending travel of the sleeve 5; when the limiting structure locks the ascending of the sleeve 5, the part of the sleeve 5 connected with the lantern ring is higher than the sliding block 2, namely, the runner forming part is separated from the sliding block 2 when the limiting structure locks the ascending of the sleeve 5. Step e, the limiting structure locks the ascending of the sleeve 5, the thimble 6 drives the runner forming part to continuously ascend, and the runner forming part gradually breaks away from the upper end of the sleeve 5, and the process is shown in fig. 3 to 4.
And f, the lower end of the second flange of the push rod 7 is abutted against the lower end of the second hollow hole (namely, the movable part rises to finish the space avoidance), the movable part 3 drives the thimble 6 and the push rod 7 to rise, and the thimble 6 and the sliding block 2 synchronously rise. This process is shown in fig. 4 to 5. And g, pushing up the product by the ejector rod 9, separating the product from the sliding block 2, and taking the product away, wherein the process is shown in fig. 5-6. In the steps d to g, after the runner molding piece is separated from the sliding block 2, the runner molding piece is taken away.
And h, the movable piece drives the sliding block 2 and the ejector pin to reset, the whole lower die assembly moves upwards to reset, and die assembly is completed.
The upper end of the sleeve 5 is provided with a recess 5b; the opening direction of the concave part 5b is upward; the ejector pin 6 can protrude out of the bottom surface of the concave part 5b when rising. Preferably, two flow dividing channels are arranged, the concave part 5b is a U-shaped notch or a V-shaped notch, and two branch angles are formed at the upper end part of the sleeve 5; and when the mold is closed, the upper end of the supporting angle is abutted against the upper mold 1. The concave part 5b forms a rubber column of the flow channel forming part, the rubber column is matched with the lantern ring and can be better connected with the upper end of the sleeve 5, the thimble 6 well brings up the sleeve 5 through the flow channel forming part, the flow channel forming part and a product are good in segmentation quality, and the product is not easy to damage.
Products, materials, etc., are not structures of the present invention; the products, materials, etc. are included in the claims to illustrate structure and/or function.
In the present invention, the upper mold and the row block 21 are both removable and replaceable, and may be purchased/designed independently for actual sales.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and any modifications or equivalent substitutions without departing from the spirit and scope of the present invention should be covered in the scope of the technical solution of the present invention.
Claims (7)
1. The novel runner structure mold is characterized by comprising an upper mold (1) and a lower mold assembly, wherein the lower mold assembly comprises a sliding block;
a cavity (4) and a runner are arranged at the connecting position between the upper die (1) and the sliding block; the runner (13) comprises a main runner (13 b) arranged at the upper end of the runner and at least two diversion runners arranged in the lateral direction, the main runner (13 b) is communicated with a glue injection port (13 a), one end, far away from the main runner (13 b), of the diversion runner is communicated with a cavity (4), and the cavity (4) is correspondingly arranged with the diversion runners; the sliding block is provided with a through hole for connecting the sleeve, the upper end of the sleeve (5) is connected to the flow channel (13), and the shaft diameter of the upper end part of the sleeve (5) is smaller than that of the middle part of the sleeve (5);
the thimble (6) is inserted into the sleeve (5), the thimble (6) can protrude out of the sleeve (5) when rising, the lower die substrate is provided with a limiting structure for limiting the rising stroke of the sleeve (5), and the rising of the thimble (6) is used for driving the runner (13) forming part to be far away from the product and driving the runner forming part to be separated from the sleeve; the lower die substrate comprises an upper substrate and a lower substrate which are detachably connected, and the first hollow hole is formed in the connection position between the upper substrate and the lower substrate; the upper base plate and the lower base plate are separated and used for disassembling and assembling the sleeve; when the upper substrate and the lower substrate are separated, the sleeve can be pulled away from the upper substrate and the lower substrate;
the sliding block is connected with a push rod (7), the push rod (7) is used for driving the sliding block to ascend, and the push rod (7) and the thimble (6) are connected with the same movable piece (3); the movable part (3) is provided with a avoidance space for delaying the push rod (7) to rise, and the push rod (7) rises later than the thimble (6);
the middle part or the lower end of the sleeve (5) is provided with a first flange (5 a), the limiting structure is a first hollow hole which is arranged on the lower die base plate and used for accommodating the first flange (5 a) to slide, and the sleeve (5) protrudes upwards from the first hollow hole; the middle part or the lower end of the push rod (7) is provided with a second flange, the movable piece (3) is provided with a second hollow hole for accommodating the second flange to slide, and the push rod (7) protrudes upwards from the second hollow hole to extend out of the movable piece (3); the movable piece (3) comprises an upper plate (31) and a lower plate (32), and the second center hole is arranged at the connecting position between the upper plate (31) and the lower plate (32); the upper plate (31) and the lower plate (32) are separated and used for disassembling and assembling the push rod (7); when the upper plate (31) and the lower plate (32) are separated, the push rod (7) can be pulled away from the upper plate (31) and the lower plate (32); when the upper die (1) and the sliding block are matched, the distance L between the upper end of the first flange (5 a) and the upper end of the first hollow hole 1 Distance L between the lower end of the second flange and the lower end of the second hollow hole 2 And L is 1 < L 2 The method comprises the steps of carrying out a first treatment on the surface of the The distance between the lower end of the second flange and the lower end of the second hollow hole is used as a clearance space for the push rod (7) to act, and when the lower end of the second flange is abutted to the lower end of the second hollow hole, the movable piece (3) can drive the push rod (7) to ascend.
2. An injection molding method, comprising the novel runner structure mold of claim 1, comprising the steps of: step a, the upper die (1) and the lower die assembly are matched;
step b, filling materials through a glue injection port (13 a), wherein the materials are filled along a main runner (13 b) and are poured into a cavity (4) through a diversion runner; the sliding block is provided with a through hole for connecting the sleeve (5), the upper end of the sleeve (5) is connected to the flow channel (13), the shaft diameter of the upper end part of the sleeve (5) is smaller than that of the middle part of the sleeve (5), and a space is formed between the upper end part of the sleeve (5) and the through hole; when the injection molding of the cavity (4) is completed, the space is filled with materials, and the part of materials form a lantern ring at the upper end part of the inverted buckle sleeve;
step c, the lower die assembly is separated downwards to open the die;
a lifting thimble (6) is inserted into the sleeve (5), and the thimble (6) can protrude out of the sleeve (5) when lifting; step d, the movable piece (3) drives the thimble (6) to ascend, the thimble (6) jacks up the runner molding piece, the connection between the molding product and the runner molding piece is cut off, and the sleeve ring part of the runner molding piece drives the sleeve (5) to ascend synchronously;
the die is provided with a limiting structure for limiting the ascending travel of the sleeve (5); step d, when the limiting structure locks the ascending of the sleeve (5), the part of the sleeve (5) connected with the lantern ring is higher than the sliding block; step e, the limiting structure locks the ascending of the sleeve (5), the thimble (6) drives the runner forming part to continuously ascend, and the runner forming part gradually breaks away from the upper end of the sleeve (5);
f, the lower end of a second flange of the push rod (7) is abutted against the lower end of the second hollow hole, and the movable piece (3) drives the thimble (6) and the push rod (7) to ascend, and the thimble (6) and the sliding block ascend synchronously; step g, pushing the product on the ejector rod, so that the product is separated from the sliding block, and taking the product away; and d, in the steps of g, removing the runner molding piece after the runner molding piece is separated from the sliding block.
3. An injection molding process according to claim 2, wherein: the shaft diameter of the output end of the flow dividing channel is gradually reduced along the material flow direction.
4. A method of injection molding according to claim 3, wherein: the shape of the output end of the shunt channel is one of a ox horn shape, a diving port and a cone shape.
5. An injection molding process according to claim 2, wherein: the flow dividing channel sequentially comprises a horizontal flow channel (13) and an inclined flow channel (13) along the material flow direction; the inclined runner (13) is used for feeding materials downwards to the cavity (4) in an inclined way; the inclined flow channel (13) is communicated with the lower side of the output end of the horizontal flow channel (13); the upper side of the output end of the horizontal runner (13) is provided with a convex angle.
6. An injection molding process according to any one of claims 2 to 5, wherein: the upper end part of the sleeve (5) is provided with a concave part (5 b); the opening direction of the concave part (5 b) is upward; the thimble (6) can be protruded out of the bottom surface of the concave part (5 b) when ascending.
7. An injection molding process according to claim 6, wherein: the two flow dividing channels are arranged, the concave part (5 b) is a U-shaped notch or a V-shaped notch, and two branch angles are formed at the upper end part of the sleeve (5); when the mold is closed, the upper end of the support angle is abutted against the upper mold (1).
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| CN114347392A (en) * | 2022-01-10 | 2022-04-15 | 南通鑫隆欣精密模具有限公司 | Intelligent key cap mold |
| CN115284553B (en) * | 2022-07-28 | 2023-04-11 | 嘉兴精科科技有限公司 | High-precision foldable mobile phone rotating shaft assembly forming device and technology |
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