CN107457965B - Valve needle type hot runner cylinder - Google Patents
Valve needle type hot runner cylinder Download PDFInfo
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- CN107457965B CN107457965B CN201710947737.8A CN201710947737A CN107457965B CN 107457965 B CN107457965 B CN 107457965B CN 201710947737 A CN201710947737 A CN 201710947737A CN 107457965 B CN107457965 B CN 107457965B
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- hot runner
- cylinder
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- 230000001105 regulatory effect Effects 0.000 claims abstract 2
- 238000003825 pressing Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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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
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
- B29C45/281—Drive means therefor
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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 valve needle type hot runner cylinder which comprises a piston, a cylinder body and a valve needle extending longitudinally, wherein the piston is longitudinally movably arranged in the cylinder body and drives the valve needle to move longitudinally; the valve needle type hot runner cylinder further comprises a support frame and an adjusting piece, wherein the adjusting piece can be operatively arranged between the support frame and the cylinder body, and when the adjusting piece is operated, the cylinder body moves longitudinally relative to the support frame so as to adjust the maximum extending length of the free end of the valve needle relative to the support frame. The setting of regulating part makes cylinder body can reciprocate relatively the support frame to the maximum extension of adjusting the needle relative the support frame solves its length overlength or too short and unusable problem that leads to because of thermal expansion, manufacturing defect or use wearing and tearing. Compared with the prior art, the quality of the plastic product is improved, the waste of resources is avoided, and the service life of the valve needle is prolonged.
Description
Technical Field
The invention belongs to the technical field of hot runner injection molding, and particularly relates to a valve needle type hot runner cylinder.
Background
Hot runner (hot runner) is a collection of heating assemblies used in injection molds to inject molten plastic into the cavity of the mold. Hot runner systems are generally comprised of a hot nozzle, a manifold, a temperature control box, and accessories. The hot runner system is divided into an open type hot runner system and a needle valve type hot runner system, and the corresponding hot runner system which meets the requirements is selected according to the requirements of raw materials, appearance and performance of different products, so that a corresponding nozzle form is selected.
In the valve needle type hot runner system, a valve needle is usually driven to move by an air cylinder, and the valve needle can be driven to move by controlling the air cylinder so as to control the opening and closing of a pouring gate.
However, in the prior art, the length of the valve needle is easily affected by factors such as thermal expansion, machining dimensional tolerance of a template and the like, so that the length of the valve needle is inconsistent with an ideal value during actual injection molding, and the length of the valve needle is too long or too short. When the length of the valve needle is too long, the valve needle can impact the pouring gate to cause the pouring gate to bulge, and a parting surface and a mold core are damaged; when the length of the valve needle is too short, the condition that burrs, the sealing glue and the like can occur in the pouring gate, and the surface quality of a product is influenced. In addition, the valve needle can collide with the gate when the gate is opened and closed, and a certain abrasion loss can be generated on the head of the valve needle after multiple collisions, so that the sealing performance of the gate is affected when the valve needle abuts against the gate. The above problems are generally avoided by replacing the valve needle in the prior art, which causes great inconvenience and waste.
In view of the above, there is a need to provide an improved valve pin type hot runner cylinder to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a valve needle type hot runner cylinder which can adjust a valve needle to enable the valve needle to be in an ideal position.
In order to achieve the above purpose, the technical solutions provided by the embodiments of the present invention are as follows:
a valve needle type hot runner cylinder comprises a piston, a cylinder body and a valve needle extending longitudinally, wherein the piston is longitudinally movably arranged in the cylinder body and drives the valve needle to move longitudinally; the valve needle type hot runner cylinder further comprises a support frame and an adjusting piece, wherein the adjusting piece can be operatively arranged between the support frame and the cylinder body, and when the adjusting piece is operated, the cylinder body moves longitudinally relative to the support frame, so that the maximum extending length of the free end of the valve needle relative to the support frame is adjusted.
As a further development of the invention, the adjusting element is rotated in the circumferential direction to produce a relative longitudinal displacement with respect to the support frame and/or the cylinder body.
As a further improvement of the present invention, the adjusting member includes a support portion and an adjusting portion, the adjusting member is assembled to one of the support frame and the cylinder body through the support portion in a longitudinally relatively fixed manner, and the adjusting member is screwed to the other of the support frame and the cylinder body through the adjusting portion in a longitudinally adjustable manner.
As a further improvement of the present invention, the support frame includes a support plate disposed at least partially above the cylinder body, the support plate includes a longitudinally extending channel, the channel is provided with a step portion, the support portion is suspended and supported on the step portion, and the adjusting portion extends downward through the channel and is in threaded connection with the cylinder body.
As a further development of the invention, the adjusting member comprises an operating portion which is engageable with a tool to enable the adjusting member to be operatively rotated.
As a further improvement of the invention, the supporting frame further comprises a pressing plate, the pressing plate is connected above the supporting plate, and at least part of the supporting part is positioned between the pressing plate and the supporting plate and is longitudinally limited; the pressing plate includes a longitudinally extending intermediate hole, and the operating portion is exposed at the intermediate hole.
As a further improvement of the present invention, the supporting frame includes a first rotation stopping member, and the first rotation stopping member is disposed between the supporting plate and the pressing plate to prevent the supporting plate and the pressing plate from rotating relatively; the first rotation stopping piece is a rotation stopping pin, and the supporting plate and the pressing plate are correspondingly provided with rotation stopping holes matched with the rotation stopping pin.
As a further improvement of the invention, the valve needle type hot runner cylinder further comprises a position retaining piece which is detachably connected between the supporting frame and the cylinder body; when the maximum extension length is adjusted to a target value, the position retaining piece is used for keeping the longitudinal position between the supporting frame and the cylinder body relatively fixed; the position maintaining piece comprises a positioning screw and an adjusting gasket clamped between the supporting frame and the cylinder body.
As a further improvement of the invention, the valve needle type hot runner cylinder is supported on the splitter plate, and the support frame and the splitter plate are relatively fixed in longitudinal position.
As a further improvement of the present invention, the support frame further includes a water path plate, the water path plate is disposed between the cylinder body and the flow distribution plate, and a second rotation stopping member is further disposed between the cylinder body and the water path plate to limit the cylinder body and the water path plate from rotating relatively.
The invention has the beneficial effects that: according to the valve needle type hot runner cylinder provided by the invention, the adjusting part is arranged to enable the cylinder body to move up and down relative to the supporting frame, so that the maximum extension length of the valve needle relative to the supporting frame is adjusted, and the problem that the valve needle cannot be used due to too long or too short length caused by thermal expansion, manufacturing defects or use abrasion is solved. Compared with the prior art, the quality of the plastic product is improved, the waste of resources is avoided, and the service life of the valve needle is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic perspective view of a cylinder according to an embodiment of the present invention;
FIG. 2 is an exploded view of the cylinder of FIG. 1;
FIG. 3 is a schematic top view of the cylinder of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the cylinder of FIG. 3 taken along direction A-A;
fig. 5 is a schematic cross-sectional view of the cylinder of fig. 3 taken along the direction B-B.
1. Cylinder body 11, cylinder barrel 113, straight groove
115. Air inlet 117, air outlet 12 and cylinder base
121. Snap ring 123, inner seal ring 125, outer seal ring
2. Piston 21, piston head 211, and seal ring
23. Piston rod 3, needle 31, mounting end
33. Free end 4, support plate 41, step part
43. Mounting hole 45, small hole 5 and adjusting piece
51. Support portion 511, operation portion 53, and adjustment portion
6. Cavity 61, internal thread 7 and pressure plate
71. Middle hole 8, rotation stopping pin 9 and support column
91. A set screw 93, a second rotation stop member 95, and a third rotation stop member
96. Adjusting gasket 100 and air cylinder
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
In the various drawings of the present invention, certain dimensions of structures or portions are exaggerated relative to other structures or portions for ease of illustration and, therefore, are used only to illustrate the basic structure of the subject matter of the present invention.
Terms such as "upper," "above," "lower," "below," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Also, it should be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described elements should not be limited by these terms. These terms are only used to distinguish these descriptive objects from one another.
The invention discloses a valve needle type hot runner cylinder 100, wherein the cylinder 100 comprises a piston 2, a cylinder body 1 and a valve needle 3 extending longitudinally, and the piston 2 is longitudinally movably arranged in the cylinder body 1 and drives the valve needle 3 to move longitudinally.
Referring to fig. 1, 2 and 4, the valve pin 3, the piston 2 and the cylinder body 1 are arranged along a longitudinal axis (not shown) of the valve pin 3, and the piston 2 is longitudinally movably installed in the cylinder body 1 to drive the valve pin 3 to longitudinally move, so as to open and close the gate. In the present embodiment, the cylinder body 1 is provided with an air inlet 115 and an air outlet 117, however, in other embodiments, the cylinder 100 may be replaced by a hydraulic cylinder, and accordingly, the cylinder body is provided with an oil inlet and an oil outlet.
Wherein the cylinder body 1 comprises a cylinder tube 11 having an inner cavity for the movement of the piston 2, the cylinder tube 11 being configured as a cylindrical housing having a lower opening, and a cylinder base 12 provided at the bottom of the cylinder tube 11 to seal an annular gap between the lower opening and the piston 2. In the present embodiment, the cylinder base 12 extends from the bottom of the cylinder 11 to the upper portion of the cylinder 11 to bear a small amount of lateral load on the piston rod 23, so as to reduce the downward bending amount of the piston rod 23 when extending out, and prolong the service life of the cylinder 100. To enhance the sealing effect, the cylinder base 12 is provided with an inner seal ring 123 and an outer seal ring 125. The cylinder body base 12 and the cylinder barrel 11 are in clearance fit, in addition, a clamping ring 121 is further arranged on the lower portion of the cylinder body base 12, and the clamping ring 121 and a step-shaped limiting portion (not marked) on the inner wall of the cylinder barrel 11 limit the cylinder body base 12 longitudinally together to limit the longitudinal movement of the cylinder body base 12.
With continued reference to fig. 4, the valve needle 3 is mounted on the piston 2 by a hanging table (not shown), specifically, the piston 2 comprises a piston head 21 and a piston rod 23, the valve needle 3 comprises a mounting end 31 and a free end 33, wherein the mounting end 31 of the valve needle 3 is fixedly connected to the piston rod 23 by the hanging table. The free end 33 of the valve pin 3 has two extreme positions when opening and closing the gate, namely two extreme positions corresponding to the longitudinal movement of the piston 2 in the inner cavity of the cylinder body 1. Because the position of the valve needle 3 relative to the piston 2 is not adjustable, in the prior art, when the length of the valve needle 3 is affected by factors such as thermal expansion and tolerance of the processing dimension of the mold plate and is inconsistent with an ideal value, or after the valve needle 3 is abraded due to multiple times of collision with a sprue, the maximum extending length of the free end 33 of the valve needle 3 relative to the support frame is too long or too short, so that the use effect is affected, and inconvenience is brought to production.
In a preferred embodiment of the present invention, the cylinder 100 further includes a support frame (not shown) and an adjusting member 5, the adjusting member 5 is disposed between the support frame and the cylinder body 1, and by operating the movement of the adjusting member 5, the longitudinal relative position between the cylinder body 1 and the support frame can be adjusted, that is, the cylinder body 1 is moved longitudinally relative to the support frame, so as to adjust the maximum protruding length of the free end 33 of the needle 3 relative to the support frame. The adjusting part 5 is arranged to enable the cylinder body 1 to move up and down relative to the supporting frame, so that the maximum extension length of the free end 33 of the valve needle 3 relative to the supporting frame is changed by corresponding up and down movement of the valve needle 3, and the problem that the valve needle cannot be used due to too long or too short length caused by thermal expansion, manufacturing defects or use abrasion is solved.
Specifically, the adjuster 5 is rotated in the circumferential direction to produce a relative longitudinal displacement with respect to the support frame and/or the cylinder body 1, in other words, by operating the adjuster 5, at least one of the support frame and the cylinder body 1 and the adjuster 5 are rotated in the circumferential direction to produce a longitudinal displacement. The adjusting piece 5 comprises a supporting part 51 and an adjusting part 53, the adjusting piece 5 is assembled on one of the supporting frame and the cylinder body 1 in a relatively fixed mode in the longitudinal position through the supporting part 51, and the adjusting piece 5 is connected to the other of the supporting frame and the cylinder body 1 in a threaded mode in the longitudinal position in an adjustable mode through the adjusting part 53. The circumferential rotation motion is converted into longitudinal displacement by the threaded connection of the support part 51 with the support frame or the cylinder body 1, thereby adjusting the longitudinal position of the support frame and the cylinder body 1. Of course, the manner of achieving the longitudinal displacement is not limited to the screw-thread fit, and any deformation based on the present concept is included in the "movement of the adjusting member 5" manner described in the present invention.
In the present embodiment, the adjusting member 5 is assembled to the support frame through the support portion 51 in a longitudinally fixed manner, and the adjusting member 5 is screwed to the cylinder body through the adjusting portion 53 in a longitudinally adjustable manner. The relative positions of the supporting part 51 and the support frame are fixed in the longitudinal direction, and the relative positions of the cylinder body 1 and the support frame are changed by changing the relative position between the adjusting part 53 and the cylinder body 1, so that the purpose of adjusting the maximum extending length of the free end 33 of the valve needle 3 relative to the support frame is achieved.
Referring to fig. 4 and 5, the support bracket includes a support plate 4 at least partially disposed above the cylinder body 1, the support plate 4 includes a longitudinally extending channel (not labeled), the channel is provided with a step portion 41, the support portion 51 is suspended and supported on the step portion 41, and the adjustment portion 53 extends downward through the channel and is in threaded connection with the cylinder body 1.
Specifically, the adjusting portion 53 is provided with an external thread, the end portion of the cylinder body 1 is concavely provided with a cavity 6, an inner wall of the cavity 6 is provided with an internal thread 61 matched with the external thread, and the adjusting piece 5 is matched with the cavity 6 through the adjusting portion 53 to adjust the distance between the support plate 4 and the cylinder body 1. It is to be noted that the cavity 6 is formed at the end of the cylinder 11, the end of the cylinder 11 having a certain thickness, the cavity 6 being blind, i.e. the cavity 6 does not penetrate the end of the cylinder 11 into the cylinder 11.
Referring to fig. 2 and 3, the adjusting member 5 includes an operating portion 511 that can cooperate with a tool to enable the adjusting member 5 to be operatively rotated, and the operating portion 511 is disposed at one end of the supporting portion 51. By the arrangement, the operation from the outside is convenient for a user. Preferably, the operating portion 511 is provided with an inner cavity having a cross-section of a regular polygon. In the present embodiment, the cross section of the inner cavity presents a regular hexagon matched with a hexagonal wrench, and in other embodiments, the cross section of the inner cavity can also be a regular pentagon, a quadrangle or a regular triangle to be matched with a corresponding wrench for use. Of course, the operation portion 511 may have an outer contour of a regular polygon and be used in cooperation with a wrench of an inner polygon. In addition, the operation portion 511 may further include a line, cross or cross pattern to cooperate with a screwdriver.
Referring to fig. 2, 4 and 5, the support frame further comprises a pressing plate 7, the pressing plate 7 is connected above the support plate 4, and the support part 51 is at least partially located between the pressing plate 7 and the support plate and is longitudinally limited so as to prevent the support part 51 from being ejected upwards due to backward thread under the influence of the movement of the piston 2. The pressing plate 7 is arranged to fix the relative position of the supporting portion 51 and the supporting frame in the longitudinal direction, of course, the pressing plate 7 does not limit the circumferential rotation movement of the supporting portion 51, the pressing plate 7 includes a middle hole 71 extending in the longitudinal direction, and the operating portion 511 is exposed to the middle hole 71, so that the user can conveniently operate the operating portion 511 through the middle hole 71. In the present embodiment, the pressure plate 7 is attached to the support plate 4 by screws.
With continued reference to fig. 3 and 4, the support plate 4 includes a first rotation stopping member disposed between the support plate 4 and the pressure plate 7 to prevent the support plate 4 and the pressure plate 7 from rotating relative to each other to consume the torque generated by the rotation of the support portion 51. Preferably, the first rotation stopping member is a rotation stopping pin 8, and the support plate 4 and the pressure plate 7 are correspondingly provided with rotation stopping holes (not shown) matched with the rotation stopping pin 8. Preferably, two anti-rotation pins 8 are provided between the support plate and the pressure plate 7, the two anti-rotation pins 8 being symmetrically arranged.
As shown in fig. 3 and 5, the support frame is detachably connected to the cylinder body 1, and the valve pin type hot runner cylinder 100 further includes a position holder detachably connected between the support frame and the cylinder body 1. The position holding member is used to keep the longitudinal position between the support frame and the cylinder body 1 relatively fixed after the adjusting member 5 is operated as required and the maximum extension length of the needle 3 is adjusted to a target value. That is, the position maintaining member is used to maintain the longitudinal relative position between the support frame and the cylinder body 1 when the adjustment of the adjusting member 5 is completed as required.
The valve needle type hot runner cylinder 100 further comprises a position holder detachably connected between the support frame and the cylinder body 1; when the maximum extension length is adjusted to a target value, the position holding member is used for keeping the longitudinal position between the support frame and the cylinder body 1 relatively fixed. The positioning of the position maintaining member facilitates the positioning of the valve needle 3 at the optimum position, i.e. when the protruding length of the valve needle 3 needs to be adjusted, the position maintaining member needs to be removed, then the operation portion 511 of the supporting portion 51 is operated by a tool such as a wrench, the adjusting portion 53 is rotated to elongate or shorten the longitudinal distance between the supporting plate 4 and the cylinder body 1, after the adjustment is completed, the relative distance between the supporting plate 4 and the cylinder body 1 reaches a target value, i.e. the maximum protruding length of the valve needle 3 relative to the supporting frame reaches the target value, and at this time, the position maintaining member is reinstalled to maintain the target value between the supporting plate 4 and the cylinder body 1. Preferably, the position maintaining member includes a screw (not shown), one end of the screw is inserted into the mounting hole 43 of the support plate 4, and the other end of the screw abuts against the upper end surface of the cylinder body 1, so as to maintain the support plate 4 and the cylinder body 1 at an optimal target distance.
In this embodiment, the position holder further includes an adjusting washer 96, and the adjusting washer 96 is detachably fitted on the screw and clamped between the support plate 4 and the cylinder body 1, and may be increased or decreased as required or replaced with an adjusting washer 96 having a different thickness. When the relative distance between the support plate 4 and the cylinder body 1 is large, more or thicker adjustment shims 96 are required, and when the relative distance between the support bracket and the cylinder body 1 is short, it is possible to solve the problem by reducing the number of adjustment shims 96 or replacing them with thinner adjustment shims 96.
In addition, the hot runner system further includes a splitter plate (not shown), the valve pin type hot runner cylinder 100 is supported on the splitter plate, and the support frame is fixed relative to the longitudinal position of the splitter plate.
The support frame further includes a water path plate (not shown), the water path plate is disposed between the cylinder body 1 and the flow distribution plate, and the water path plate is filled with cooling water to prevent the heat of the flow distribution plate from being excessively transferred to the cylinder 11 to affect the service life of the sealing ring 211 sleeved on the piston head 21 and the inner sealing ring 123 and the outer sealing ring 125 disposed on the cylinder base 12. Wherein, still be equipped with second rotation stopping member 93 between cylinder 11 and the water route board, second rotation stopping member 93 is used for limiting the circumferential motion of cylinder body 1 to provide the guide effect for the longitudinal displacement of cylinder body 1. Preferably, a third rotation preventing member 95 is further disposed between the piston 2 and the waterway plate, and the third rotation preventing member 95 prevents the piston 2 from rotating in the cylinder 11, so as to prevent the valve pin 3 from rotating and causing poor gate molding.
In summary, the support frame includes a support plate 4, a pressing plate 7 disposed on the support plate, a first rotation stopping member (rotation stopping pin 8) for limiting the relative rotation between the support plate 4 and the pressing plate 7, and a water channel plate, wherein the cylinder body 1 is disposed between the support plate 4 and the water channel plate. Wherein the longitudinal position between the water channel plate and the support plate 4 is relatively fixed. Due to the movement of the adjustment member 5, the cylinder body 1 is moved longitudinally within the distance defined by the support plate 4 and the waterway plate to adjust the maximum extension of the free end 33 of the needle 3 with respect to the support frame.
It should be noted that the supporting plate 4 is fixed on the water route board through the supporting column 9 and the fastening screw 91, specifically, the supporting plate 4 is provided with a small hole 45 for the fastening screw 91 to pass through, the supporting column 9 is provided with a middle through hole (not shown), and the fastening screw 91 passes through the small hole on the supporting plate 4 and the middle through hole of the supporting column 9 and is locked on the water route board, thereby fixing the supporting plate 4 on the water route board. In this way, the longitudinal distance between the support plate 4 and the waterway plate is defined by the fastening screws 91 passing through the support posts 9. In this embodiment, the number of the support columns 9 is four, and the four support columns 9 are uniformly distributed along the circumferential direction of the cross section of the support frame. The outer wall of the cylinder 11 is opened with a straight groove 113 for accommodating the support pillar 9, preferably, the straight groove 113 is an open groove.
In summary, in the valve needle type hot runner cylinder 100 provided by the preferred embodiment of the present invention, the adjusting member 5 is disposed to enable the cylinder body 1 to move longitudinally relative to the support frame, so as to adjust the maximum protruding length of the free end 33 of the valve needle 3 relative to the support frame, and solve the problem that the length is too long or too short due to thermal expansion, manufacturing defect or wear in use, so as to be unusable. Compared with the prior art, the quality of the plastic product is improved, the waste of resources is avoided, and the service life of the valve needle is prolonged.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. A valve needle type hot runner cylinder comprises a piston, a cylinder body and a valve needle extending longitudinally, wherein the piston is longitudinally movably arranged in the cylinder body and drives the valve needle to move longitudinally; the method is characterized in that: the valve needle type hot runner cylinder further comprises a supporting frame and an adjusting piece, the adjusting piece can be operatively arranged between the supporting frame and the cylinder body, and when the adjusting piece is operated, the cylinder body moves longitudinally relative to the supporting frame so as to adjust the maximum extending length of the free end of the valve needle relative to the supporting frame;
the adjusting piece generates relative longitudinal displacement with the cylinder body through circumferential rotation;
the adjusting piece comprises a supporting portion and an adjusting portion, the adjusting piece is assembled on the supporting frame in a longitudinally-fixed mode through the supporting portion, and the adjusting piece is connected to the cylinder body in a longitudinally-position-adjustable threaded mode through the adjusting portion.
2. The valve pin type hot runner cylinder according to claim 1, wherein: the support frame including at least part set up in the backup pad of cylinder body top, the backup pad includes the passageway of longitudinal extension, the passageway is provided with the step portion, the supporting part suspended support in step portion, the regulating part pass the passageway downwardly extending and with cylinder body threaded connection.
3. The valve pin type hot runner cylinder according to claim 2, wherein: the adjustment member includes an operating portion engageable with a tool to enable the adjustment member to be operatively rotated.
4. The valve pin type hot runner cylinder according to claim 3, wherein: the supporting frame further comprises a pressing plate, the pressing plate is connected above the supporting plate, and at least part of the supporting part is located between the pressing plate and the supporting plate and is longitudinally limited; the pressing plate includes a longitudinally extending intermediate hole, and the operating portion is exposed at the intermediate hole.
5. The valve pin type hot runner cylinder according to claim 4, wherein: the supporting frame comprises a first rotation stopping piece, and the first rotation stopping piece is arranged between the supporting plate and the pressing plate to prevent the supporting plate and the pressing plate from rotating relatively; the first rotation stopping piece is a rotation stopping pin, and the supporting plate and the pressing plate are correspondingly provided with rotation stopping holes matched with the rotation stopping pin.
6. The valve pin type hot runner cylinder according to claim 1, wherein: the valve needle type hot runner cylinder further comprises a position retaining piece, and the position retaining piece is detachably connected between the supporting frame and the cylinder body; when the maximum extension length is adjusted to a target value, the position retaining piece is used for keeping the longitudinal position between the supporting frame and the cylinder body relatively fixed; the position maintaining piece comprises a positioning screw and an adjusting gasket clamped between the supporting frame and the cylinder body.
7. The valve pin type hot runner cylinder according to claim 1, wherein: the valve needle type hot runner cylinder is supported on the flow distribution plate, and the support frame and the longitudinal position of the flow distribution plate are relatively fixed.
8. The valve pin type hot runner cylinder according to claim 7, wherein: the support frame still includes the water route board, the water route board is located cylinder body with between the flow distribution plate, cylinder body with still be equipped with the second between the water route board and spline the piece, in order to restrict cylinder body with the relative rotation takes place for the water route board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947737.8A CN107457965B (en) | 2017-10-12 | 2017-10-12 | Valve needle type hot runner cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947737.8A CN107457965B (en) | 2017-10-12 | 2017-10-12 | Valve needle type hot runner cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN107457965A CN107457965A (en) | 2017-12-12 |
| CN107457965B true CN107457965B (en) | 2020-05-12 |
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| CN201710947737.8A Active CN107457965B (en) | 2017-10-12 | 2017-10-12 | Valve needle type hot runner cylinder |
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| CN114290189B (en) * | 2022-02-08 | 2024-09-13 | 盘起工业(大连)有限公司 | Valve needle diversion trench processing method and special valve needle former |
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| DE102009024271B4 (en) * | 2009-06-05 | 2017-05-24 | Psg Plastic Service Gmbh | Actuator for a needle valve nozzle |
| CN201579932U (en) * | 2009-10-21 | 2010-09-15 | 吴志墉 | Stroke-adjustable piston |
| WO2015183332A1 (en) * | 2013-05-29 | 2015-12-03 | Synventive Molding Solutions, Inc. | Actuator cooling apparatus and method |
| WO2014194037A1 (en) * | 2013-05-29 | 2014-12-04 | Synventive Molding Solutions, Inc. | Valve pin position adjuster |
| CN206017324U (en) * | 2016-08-23 | 2017-03-15 | 苏州昊信精密机械有限公司 | There is the needle valve type hot runner oil cylinder of arrangement for adjusting height |
| CN207535233U (en) * | 2017-10-12 | 2018-06-26 | 柳道万和(苏州)热流道系统有限公司 | Valve needle type hot runner cylinder |
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2017
- 2017-10-12 CN CN201710947737.8A patent/CN107457965B/en active Active
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