CN217514458U

CN217514458U - Cutting mechanism in injection molding product runner mould

Info

Publication number: CN217514458U
Application number: CN202221275464.XU
Authority: CN
Inventors: 沈伟倩; 刘佩
Original assignee: Shanghai Donglei Precision Mould Technology Co ltd
Current assignee: Shanghai Donglei Precision Mould Technology Co ltd
Priority date: 2022-05-14
Filing date: 2022-05-14
Publication date: 2022-09-30
Anticipated expiration: 2032-05-14

Abstract

The utility model relates to a technical field of the inscribe of mould, in particular to cutting mechanism in injection moulding product runner mould, including bottom plate and cutting blade, still including setting up the jack-up subassembly on the bottom plate, the runner groove and the mould groove of intercommunication are seted up to the terminal surface that quiet template is close to the movable mould board, the jack-up subassembly includes roof, department section of thick bamboo and thimble, the jack-up chamber has been seted up to the bottom plate, thimble one end is fixed to be set up on the bottom plate, the other end and the cutting blade fixed connection of arranging runner groove department in, department section of thick bamboo slip cap is established on the thimble, the one end of department section of thick bamboo is fixed to be set up on the roof to can reciprocate in the jack-up chamber along with the roof, the other end of department section of thick bamboo slides and puts into quiet template to can move and stretch into to the runner inslot. This application has improved the effect of moulding of watering of the runner department of moulding the product.

Description

Cutting mechanism in injection molding product runner mould

Technical Field

The application relates to the technical field of mold inscribing, in particular to cutting mechanism in injection molding product runner mold.

Background

The mould is various moulds and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. Different moulds are composed of different parts, and the processing of the appearance of the object is realized mainly through the change of the physical state of the formed material. And forming the blank into a workpiece with a specific shape and size under the action of external force. The mould has a specific contour or inner cavity shape, and the blank can be separated according to the contour shape by applying the contour shape with the cutting edge. The blank can obtain a corresponding three-dimensional shape by using the shape of the inner cavity. The injection mold generally comprises a movable mold plate and a fixed mold plate, which are separable and combinable. When the blank is closed, the blank is injected into the die cavity for forming. The die is a precise tool, has a complex shape, bears the expansion force of a blank, has higher requirements on structural strength, rigidity, surface hardness, surface roughness and processing precision, is one of important marks of the mechanical manufacturing level in the development level of die production, and needs to cut the allowance after injection molding.

The chinese patent with the publication number of CN209869307U discloses a cutting mechanism in injection molding product runner surplus mould, and this cutting mechanism includes mould and bed die, the mouth of moulding plastics has been seted up to one side of going up the mould, just go up the mould and be located one side of moulding plastics the mouth and seted up the heat storage tank, the inside in heat storage tank is inlayed and is had the electric plate, the wire casing has still been seted up to the inside of going up the mould, mould type groove has been seted up to the upper surface of bed die, just the blade groove has been seted up to the inside lower extreme of bed die, the internally mounted in blade groove has the blade mount pad, fixed mounting has the blade on the blade mount pad, the below of bed die is equipped with servo electric jar and bottom plate, the lower fixed surface that the blade groove was run through to the lead screw upper end in the servo electric jar is in the same place with the blade mount pad, just servo electric jar fixed mounting is at the upper surface of bottom plate.

In view of the above-mentioned technologies, the inventor believes that when the product gate is cut by the blade in the above-mentioned technologies, the product gate is easily torn and pulled, and the product gate is not flat, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to improve the effect of moulding to product runner pouring in to the injection moulding process, this application provides a cutting mechanism in injection moulding product runner mould.

The application provides a cutting mechanism adopts following technical scheme in injection moulding product runner mould: the utility model provides an injection moulding product runner mold internal cutting mechanism uses in injection mold, includes bottom plate and cutting blade, still including setting up the jack-up subassembly on the bottom plate, the runner groove and the mould groove of intercommunication are seted up to the terminal surface that quiet template is close to the movable mould board, the jack-up subassembly includes roof, department section of thick bamboo and thimble, the jack-up chamber has been seted up to the bottom plate, thimble one end is fixed to be set up on the bottom plate, the other end and the cutting blade fixed connection of arranging runner groove department in, department section of thick bamboo slip cover is established on the thimble, the one end of department section of thick bamboo is fixed to can reciprocate in the jack-up intracavity along with the roof, the other end of department section of thick bamboo slides and puts into quiet template to the movable gate inslot that stretches into.

Through adopting above-mentioned technical scheme, through the rebound roof for department's section of thick bamboo, thimble and cutting blade realize the base material extrusion cutting of moulding plastics to runner department, thereby improved the runner and watered the effect of moulding plastics.

Optionally, the side wall of the top plate is fixedly connected with a connecting plate, one end of the connecting plate, far away from the top plate, is fixedly connected with an air cylinder, and the telescopic direction of an expansion rod of the air cylinder is the same as the length direction of the ejector sleeve.

Through adopting above-mentioned technical scheme, start cylinder electric connecting plate and remove, the connecting plate that removes drives the roof and removes, and the roof that removes drives the department section of thick bamboo and removes to the runner inslot to the realization is to the compression cutting of the blank of moulding plastics in the runner inslot.

Optionally, the bottom wall of the jacking cavity is fixedly provided with a limiting column, and one end, away from the bottom wall of the jacking cavity, of the limiting column is abutted against the end face, away from the static template, of the top plate.

Through adopting above-mentioned technical scheme, through setting up spacing post, restricted the distance that the roof removed, through the distance that the restriction roof removed, can improve the stability of removing the roof in-process, and can save the power that promotes the roof, have higher economic value.

Optionally, the size of the end surface of the cutting blade far away from the thimble is the same as the size of the cross section of the gate groove.

By adopting the technical scheme, the injection molding blank is prevented from leaking into the ejector sleeve, so that waste and pollution are avoided.

Optionally, the cutting blade is in the shape of a truncated pyramid.

Through adopting above-mentioned technical scheme, through the cutting blade of falling the terrace with edge form, improved the cutting effect to runner groove blank of moulding plastics.

Optionally, a spring groove is formed in the end face, close to the static template, of the top plate, and an upper spring is fixedly connected to the inner wall of the spring groove.

Through adopting above-mentioned technical scheme, through be provided with the spring between roof and quiet template, promote the roof and can compress the spring, be in compression state's spring of going up, can reduce effectively to start the cylinder and make roof quick travel, cause roof and quiet template extrusion deformation to damage, improved this cutting mechanism life.

Optionally, the groove depth of the gate groove is set to be 30mm-40 mm.

Through adopting above-mentioned technical scheme, through the distance of control compression to can compress the cutting to the blank of moulding plastics effectively, and reduce the deformation influence that causes department's section of thick bamboo, cutting blade.

Drawings

FIG. 1 is a side view of a cutting mechanism in a gate mold of an injection molded product according to the present application;

FIG. 2 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is a schematic diagram of the overall structure of an in-gate mold cutting mechanism for an injection molding product according to the present application.

Description of the reference numerals: 1. injection molding a mold; 11. moving the template; 111. injection molding a port; 12. a static template; 121. a gate slot; 122. a mold groove; 123. a sleeve hole; 2. a base plate; 21. jacking up the cavity; 3. jacking the assembly; 31. a cylinder; 32. a connecting plate; 33. a top plate; 331. a cylinder driving groove; 34. a ejector sleeve; 35. a thimble; 4. a cutting blade; 5. a limiting column; 6. an upper spring; 7. and a lower spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses an injection product sprue mold internal cutting mechanism which is applied to an injection mold 1, and with reference to fig. 1, the injection mold 1 comprises a movable mold plate 11 and a static mold plate 12, and the movable mold plate 11 and the static mold plate 12 are matched to form an injection product through injection molding; with reference to fig. 2 and 3, the cutting mechanism comprises a base plate 2, a jack-up assembly 3, and a cutting blade 4; wherein, the bottom plate 2 is arranged on the plane of the machine tool, the jacking component 3 is arranged on the bottom plate 2 and used for moving the cutting blade 4 to cut the injection product which is not opened and is subjected to pressure maintaining, and the jacking component 3 can also eject the static template 12 of the injection product which is cut and is subjected to mold opening.

Referring to fig. 2 and 3, the movable mold plate 11 is attached to the stationary mold plate 12, the movable mold plate 11 is provided with an injection port 111 having an inverted conical structure, the stationary mold plate 12 is provided with a gate groove 121 near the injection port 111, the stationary mold plate 12 is provided with a mold groove 122 near the end surface of the movable mold plate 11, wherein the injection port 111, the gate groove 121 and the mold groove 122 are communicated with each other; the hot-melted injection-molded blank is injected into the mold cavity 122 via the injection gate 111 and the gate cavity 121 until the mold cavity 122 is filled with the injection-molded blank. The depth of the gate groove 121 may be set to 30mm to 40mm, and in the embodiment of the present application, the depth of the gate groove 121 is set to 0.35 mm.

Referring to fig. 2, 3 and 4, the jacking assembly 3 includes a cylinder 31, a connecting plate 32, a top plate 33, an ejector sleeve 34 and a thimble 35, wherein a cylinder body of the cylinder 31 is fixedly welded on a side wall of the bottom plate 2, the bottom plate 2 is provided with a jacking cavity 21, the top plate 33 is disposed in the jacking cavity 21 and is welded with one end of the connecting plate 32, which is far away from the connecting plate 32, is welded with an expansion link of the cylinder 31, and an expansion direction of the expansion link of the cylinder 31 is the same as a length direction of the ejector sleeve 34; an ejector sleeve groove 331 is formed in the end face, close to the static template 12, of the top plate 33, an ejector sleeve hole 123 communicated with the sprue groove 121 is formed in the static template 12, and the ejector sleeve hole 123 is communicated with the injection molding opening 111, the mold groove 122 and the ejector sleeve groove 331; the ejector sleeve 34 is arranged in a hollow mode, one end of the ejector sleeve is welded in the inner wall of the ejector sleeve groove 331, the other end of the ejector sleeve is arranged in the ejector sleeve hole 123 in a sliding mode, the ejector pin 35 is arranged in a solid mode, one end of the ejector pin is welded on the bottom wall, far away from the static template 12, of the jacking cavity 21, and the other end of the ejector pin penetrates through the ejector sleeve 34 in a sliding mode and is arranged at the position of the sprue groove 121. When not cutting, cutting blade 4 welds the one end that bottom plate 2 was kept away from to thimble 35 to notch parallel and level under with runner groove 121, cutting blade 4 becomes the form of falling terrace with edge, and the cross section is circular, and the diameter size of the terminal surface of area is big in the terrace with edge parallel surface is the same with the internal diameter size of department section of thick bamboo 34, thereby can prevent to mould plastics the blank and reveal in the department section of thick bamboo 34.

Starting the air cylinder 31, driving the connecting plate 32 to push the top plate 33 to move upwards in the jacking cavity 21 by the telescopic rod of the air cylinder 31, driving the driver cylinder 34 to move towards the gate groove 121 by the upwards moving top plate 33, and compressing and cutting the injection molding blank at the gate groove 121 by the upwards moving driver cylinder 34 and the ejector pin 35 provided with the cutting blade 4 in the process that the driver cylinder 34 moves towards the gate groove 121; after the cutting is finished, the die is opened, and then the pouring product is abutted, so that the pouring effect at the pouring gate is improved.

Similarly, the ejector sleeve 34 may be fixedly disposed in the stationary mold 12, and the ejector pin 35 fixedly disposed with the cutting blade 4 may be disposed in the stationary mold 12 in a lifting manner, so as to perform compression cutting on the injection molding blank at the gate groove 121.

Referring to fig. 2 and 3, the bottom wall of the jacking cavity 21 is welded with a limiting column 5, and the limiting column 5 is used for limiting the lifting distance of the top plate 33 so as to improve the effect of cutting the gate; under the non-jack-up state, the end face of the top plate 33 far away from the static template 12 is abutted against the limiting column 5, and under the jack-up state, the end face of the top plate 33 far away from the bottom wall of the jack-up cavity 21 is abutted against the static template 12. In the embodiment of the present application, the top plate 33 moves up and down by a distance of 0.35mm, thereby ensuring that the ejector sleeve 34 moves in the gate slot 121 by a distance of 0.35mm as well.

Referring to fig. 2 and 3, a plurality of uniformly distributed spring grooves are formed in the end surface of the top plate 33 close to the static template 12, the bottom walls of the spring grooves are welded with upper springs 6, and one ends of the upper springs 6 far away from the spring grooves are welded with the static template 12; the in-process that roof 33 moved up, the effect of buffering is played to roof 33 and jack-up chamber 21 inner wall butt in-process to compressed last spring 6, prevents effectively that cylinder 31 from starting for promote roof 33 translation rate too fast, cause roof 33 and jack-up chamber 21 inner wall to take place the deformation that hard collision produced, and then, improved this cutting mechanism's life.

Referring to fig. 2, the lower spring 7 is fixedly arranged on the bottom wall of the jacking cavity 21, the lower spring 7 is sleeved outside the limiting column 5, the lower spring 7 is fixedly connected with the top plate 33 at one end far away from the bottom wall of the jacking cavity 21, and the length of the undeformed lower spring 7 is consistent with that of the limiting column 5, so that when the top plate 33 moves up and down, the upper spring 6 and the lower spring 7 realize the control of the movement of the top plate 33, the movement stability of the top plate 33 is improved, and the injection molding effect is further improved.

The implementation principle is as follows: when the gate needs to be compressed and cut, the cylinder 31 works to drive the connecting plate 32 to move upwards, the moving connecting plate 32 drives the top plate 33 to move upwards, the ejector sleeve 34 thimble 35 on the top plate 33 moves upwards, and the moving distance is 0.35mm, so that the blade of the ejector sleeve 34 thimble 35 can compress and cut the gate of the cast product which is not opened.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an injection moulding product runner mold internal cutting mechanism, uses in injection mold (1), including bottom plate (2) and cutting blade (4), its characterized in that: the injection molding die comprises a base plate (2) and is characterized by further comprising a jacking assembly (3) arranged on the base plate (2), wherein the injection molding die (1) comprises a movable die plate (11) and a static die plate (12), the end face, close to the movable die plate (11), of the static die plate (12) is provided with a sprue channel (121) and a die channel (122) which are communicated with each other, the jacking assembly (3) comprises a top plate (33), an ejector sleeve (34) and a thimble (35), the base plate (2) is provided with a jacking cavity (21), one end of the thimble (35) is fixedly arranged on the base plate (2), the other end of the thimble is fixedly connected with a cutting blade (4) arranged at the sprue channel (121), the ejector sleeve (34) is sleeved on the thimble (35) in a sliding manner, one end of the ejector sleeve (34) is fixedly arranged on the top plate (33) and can vertically move in the jacking cavity (21) along with the top plate (33), and the other end of the ejector sleeve (34) is slidably arranged in the static die plate (12), and can movably extend into the gate groove (121).

2. An injection molding in-gate mold cutting mechanism according to claim 1, wherein: roof (33) lateral wall fixedly connected with connecting plate (32), one end fixedly connected with cylinder (31) of roof (33) is kept away from in connecting plate (32), just the flexible direction of cylinder (31) telescopic link is the same with the length direction of department's section of thick bamboo (34).

3. An injection molding in-gate mold cutting mechanism according to claim 2, wherein: the fixed spacing post (5) that is provided with of jack-up chamber (21) diapire, just the terminal surface butt of quiet template (12) is kept away from with roof (33) to the one end that jack-up chamber (21) diapire was kept away from in spacing post (5).

4. An injection molding in-gate mold cutting mechanism according to claim 1, wherein: the size of the end surface of the cutting blade (4) far away from the thimble (35) is the same as the size of the cross section of the gate groove (121).

5. An injection molding in-gate mold cutting mechanism according to claim 4, wherein: the cutting blade (4) is in a chamfered frustum shape.

6. An injection molding in-gate mold cutting mechanism according to claim 3, wherein: the end face, close to the static template (12), of the top plate (33) is provided with a spring groove, and the inner wall of the spring groove is fixedly connected with an upper spring (6).

7. An injection molding in-gate mold cutting mechanism according to claim 6, wherein: spacing post (5) cover is equipped with down spring (7), down spring (7) one end is fixed to be set up in jack-up chamber (21) diapire, and the other end is fixed to be set up in roof (33) the terminal surface of keeping away from quiet template (12).

8. An injection molding in-gate mold cutting mechanism according to claim 7, wherein: the depth of the gate groove (121) is set to be 30-40 mm.