CN210336751U

CN210336751U - Injection mould of automatic blank in mould

Info

Publication number: CN210336751U
Application number: CN201921047762.1U
Authority: CN
Inventors: 钟超利
Original assignee: Yingli Electronic Technology Chongqing Co ltd
Current assignee: Yingli Electronic Technology Chongqing Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-04-17
Anticipated expiration: 2029-07-05

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold capable of automatically cutting materials in the mold, which comprises a fixed mold, a movable mold and an ejection mechanism arranged on the movable mold and used for ejecting products and material ports, wherein a tunnel type pouring inlet is fixedly connected on the movable mold, a tunnel type pouring inlet channel is arranged on the tunnel type pouring inlet, and when the fixed mold and the movable mold are in a mold closing state, the tunnel type pouring inlet channel and the pouring inlet channel are superposed; the tunnel type pouring inlet is internally provided with a chute penetrating through the tunnel type pouring inlet channel, and the ejection mechanism is connected with a knife edge thimble which is connected in the chute in a sliding way. The utility model discloses when the drawing of patterns, when utilizing ejection mechanism to realize the drawing of patterns of product and material mouth, ejection mechanism drives the automatic blank operation in the mould of accomplishing of edge of a knife thimble in step, realizes the quick excision to the material mouth, has solved the problem of automatic blank inefficiency in the mould among the prior art, and simple structure easily improves on current injection mould simultaneously, and leading-in cost is low.

Description

Injection mould of automatic blank in mould

Technical Field

The utility model relates to an injection mold technical field, in particular to injection mold of automatic blank in mould.

Background

The injection mold is an important component in the injection mold, and the injection mold is a short name of a mold used for plastic injection molding and is important process equipment for realizing an injection molding process. The production process of the injection mold generally comprises preparation before molding, injection process and product post-treatment, wherein rubber materials are poured into a cavity through a pouring runner, then the cavity is cooled to form a product, the rubber materials in the pouring runner are cooled to form a material port, the product and the material port cannot be separated when the mold is opened and ejected due to the fact that the existing side pouring gate and the lap joint are filled with rubber, the material port is connected with the product, after the injection process is completed, workers are required to trim the material port, the labor intensity is high, the efficiency is greatly reduced, the phenomenon of residual or rubber shortage exists at the separation position of the product and the material port in the secondary processing process, the pouring gate is trimmed unattractive, the appearance quality of the product is affected, and the product rejection rate is also improved.

In order to solve the problems, the chinese patent of invention with publication number CN108638454A discloses a mold structure for automatically cutting off the gate by hot cutting in the mold, the mold structure includes a front mold, a rear mold assembled with each other and a cutter advancing assembly arranged in the rear mold, a runner for injection molding of a product is formed between the front mold and the rear mold, and the end of each gate of the runner is connected with a product injection molding cavity; wherein, the cutter advancing component is provided with a cutter which can advance to the sprue; in the injection molding process, the cutter advancing assembly drives the cutter to be ejected into a position between the runner gate and the product injection molding cavity in the back mold, the runner and the product injection molding cavity are cut off during cooling molding of a product, and the hot cutting process in the product mold is realized.

Although the material opening can be automatically removed, a special driving assembly and a specially configured high-pressure oil pump high-pressure oil cylinder are needed to drive the cutter to jack into the pouring runner, the material opening removing operation is performed between the product cooling forming and demolding procedures, and if the material opening is cut off by the cutter too early, the pressure maintaining time in the injection process cannot be ensured, so that the size structure of the product is influenced; if the time of the processes such as pressure maintaining of the product is fully considered, the material opening can be cut off by the cutter after the product is completely cooled and molded, so that the injection production period is prolonged, and the injection molding efficiency is affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an injection mould of automatic blank in mould has solved the problem that automatic blank is inefficient in the mould, has realized that the thimble amputates the material mouth fast, promotes injection moulding's shaping efficiency.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an injection mold capable of automatically cutting materials in the mold comprises a fixed mold, a movable mold and an ejection mechanism arranged on the movable mold and used for ejecting a product and a material port, wherein a tunnel type pouring inlet is fixedly connected to the movable mold, a tunnel type pouring inlet channel is formed in the tunnel type pouring inlet, and when the fixed mold and the movable mold are in a mold closing state, the tunnel type pouring inlet channel is overlapped with the pouring inlet channel; the tunnel type pouring inlet is internally provided with a chute penetrating through the tunnel type pouring inlet channel, and the ejection mechanism is connected with a knife edge thimble which is connected in the chute in a sliding way.

The principle of the utility model is that: the tunnel type pouring inlet means that a pouring gate on the pouring inlet is in a tunnel type, namely the pouring gate is a through hole penetrating through the pouring inlet, and the through hole is used as a pouring gate channel and is called a tunnel type pouring gate channel; when the fixed die and the movable die are in a die closing state, the tunnel type sprue channel is close to the die parting surfaces of the movable die and the fixed die, the tunnel type sprue channel is overlapped with the sprue channel, the tunnel type sprue channel is used as a part of the sprue channel, in the product injection process, rubber materials flow into a cavity through the tunnel type sprue channel, then the rubber materials in the cavity form a product after pressure maintaining and cooling, and at the moment, the cooled rubber materials in the tunnel type sprue channel are used as a part of a material port; when the mould is opened after injection, the product and the material port are separated from the fixed mould along with the movement of the movable mould, and during demoulding, the ejection mechanism simultaneously ejects the product and the material port, and because the tunnel type pouring inlet is fixedly connected to the movable mould and the knife edge thimble is connected to the ejection mechanism, during demoulding, the knife edge thimble and the tunnel type pouring inlet slide relatively, and the chute penetrates through the tunnel type pouring inlet, under the limiting action of the tunnel type pouring inlet on the material port, the knife edge thimble cuts the connecting part of the product and the material port when sliding along the chute, so that the material port is separated from the product, and the automatic cutting of the material port is realized.

The scheme has the advantages that:

1. can cut off the material port rapidly and efficiently: compared with the prior art, the operation of cutting off the material opening is arranged between the injection molding and demolding procedures, so that the production period of the whole product injection is prolonged, and the product molding efficiency is low. Connect the edge of a knife thimble on ejection mechanism in this application, when carrying out the drawing of patterns after accomplishing injection moulding, accomplish the excision to the material mouth in step for injection moulding's original shaping cycle does not change, but just amputates the material mouth simultaneously at the drawing of patterns, reduces product aftertreatment process, thereby makes the shaping course of working cycle of whole product shorten, effectively promotes product shaping efficiency.

2. The structure is simple: compare and need utilize extra power drive arrangement drive cutter excision material mouth among the prior art, utilize the tunnel type to advance the unique structure of pouring in the son in this application, the tunnel type advances to pour in the son and does not exert an influence to original entering runner of watering for the outward appearance and the function of product are not influenced, simultaneously, utilize the incision thimble and the tunnel type to advance the excision of accomplishing the material mouth fast of relative slip of pouring in the son, simple structure easily realizes, can effectively simplify the structure of injection mould, reduce processing cost and simplified control procedure.

3. Can be effectively improved on the existing die to obtain: compare in the injection mould of automatic blank in prior art mould structure complicacy, need set up proprietary excision mechanism and set up corresponding movement space in the mould to provide corresponding actuating mechanism, make automatic blank mould very big with current mould inner structure difference, this difficulty that has also led to the fact to improve current mould is very big. The tunnel type advances to water in this application son is fixed connection on the movable mould, and the edge of a knife thimble is connected on ejection mechanism, and tunnel type advances to water the tunnel type on the son and advances to water runner part overlap with advancing of former mould, consequently the part of excision material mouth in this application can install additional in original mould that does not set up automatic blank in the mould fast completely, and processing is simple, moreover, the simple to operate, can realize effectively that the mould that does not set up automatic blank in the mould improves, the leading-in cost is low, thereby the processing cost of mould is reformed transform or refabricated in the refabrication greatly to practice thrift.

4. Simple structure and fault rate are low: compared with the prior art, the material port cutting device has the advantages that the structure for cutting the material port is complex, the number of control programs is large, the motion relation is complex, and the probability of the mold breaking down is high. Because each part structure of excision material mouth is simple, the cooperation relation is simple in this application, consequently the probability that breaks down in the product injection moulding process reduces, is favorable to the steady operation of mould.

Further, the tunnel type sprue channel comprises a straight channel part and an inclined transition part, and the inclined transition part is positioned between the straight channel part and the knife edge thimble.

Compared with the tunnel type sprue channel which is a straight channel, in the demolding stage, the material opening in the tunnel type sprue channel is not easy to eject out of the tunnel type sprue channel, so that demolding is difficult. In this scheme, more preferably, set up tunnel type into runner to include straight runner portion and slope transition portion, and the slope transition portion sets up between straight runner portion and edge of a knife thimble, and during the drawing of patterns, edge of a knife thimble spare product and material mouth cut off after, the material mouth breaks away from tunnel type into runner under ejection mechanism's pushing action, and the slope transition portion breaks away from tunnel type into runner for the material mouth and provides the guide effect, is convenient for breaking away from fast of material mouth to guarantee injection moulding's going on smoothly.

Further, the inclined transition part and the straight flow channel part are in circular arc transition.

The inclined transition part and the straight flow channel part are in arc transition, so that the rubber material can smoothly flow when flowing through the tunnel type gate inlet channel from the gate inlet of the mold, and the rubber material can be conveniently and quickly filled into the cavity to quickly mold a product.

Furthermore, the cross section of the sliding groove is square, and the cross section of the knife edge thimble is square.

Compare in setting up the spout to the round hole form, in this application, set up the cross section of spout to square, correspondingly, the cross section of edge of a knife thimble also is square for edge of a knife thimble when sliding along the spout, the inner wall of spout has limiting displacement to edge of a knife thimble, prevents that edge of a knife thimble from taking place to rotate at the slip in-process, causes the unable accuracy of edge of a knife thimble to amputate the material mouth.

Furthermore, an inclined concave cavity is arranged on one side of the inclined transition part, which is close to the parting surfaces of the movable mold and the fixed mold, and the side of the concave cavity, which is close to the parting surface, inclines towards the direction of the knife edge thimble.

Compared with the inclined transition part which is only an inclined channel, in the demolding stage, the material port is separated from the tunnel type feed gate channel under the thrust action of the ejection mechanism, when the ejection mechanism pushes the material port, the material port may deform and extend along the tunnel type feed gate channel, and if the material port in the tunnel type feed gate channel moves towards the direction of the knife edge thimble, the material port may abut against the knife edge thimble, so that the knife edge thimble cannot smoothly slide in the sliding groove. In this scheme, more preferably, slope transition portion is close to the cavity that divides mould face one side of movable mould and cover half and is equipped with the slope, the cavity is close to a side direction of dividing mould face and cuts a knife edge thimble direction slope, and in the injection moulding process, the sizing material also can be injected into in the cavity, and when the die sinking, the sizing material that is located the cavity carries on spacingly to the removal of tunnel type sprue gate feed inlet, prevents that tunnel type sprue gate feed inlet from to cutting an edge thimble direction deformation and hindering the slip of cutting an edge thimble, sets up the cavity after, can effectively guarantee the smooth and easy slip of cutting an edge thimble.

Further, a knife edge portion and a matching portion are fixedly connected to one end, close to the parting surface, of the knife edge thimble, when the movable die and the fixed die are in a die closing state, a knife edge of the knife edge portion is flush with the tunnel type sprue channel, and the matching portion is flush with the parting surface.

One end of the thimble close to the parting surface is fixedly connected with a knife edge part and a matching part, and the knife edge part is used for cutting off the material port during demoulding; when the movable mold and the fixed mold are in a mold closing state, the cutting edge of the cutter opening part is flush with the tunnel type sprue channel, and the matching part is flush with the mold splitting surface, so that when the mold cavity pours the sizing material, the cutter opening part and the matching part cannot block the pouring of the sizing material, and the sizing material can enter the mold cavity quickly.

Further, the knife edge part comprises two knife faces which form an included angle of 30-45 degrees with each other, wherein one knife face is parallel to the inner wall of the sliding groove, which is intersected with the tunnel type sprue channel.

The knife edge part comprises two knife faces, the included angle of the two knife faces is 30-45 degrees, so that the knife edge can rapidly cut off the material opening during demoulding, the material opening is rapidly separated from the product, and the good quality of the cut surface at the joint of the material opening and the product is ensured.

Further, the knife edge is positioned between the tunnel type sprue channel and the matching part, and the knife face which is parallel to the inner wall of the chute intersected with the tunnel type sprue channel is positioned on the outer side.

The knife edge portion is located between tunnel sprue channel and the matching portion, the knife edge portion is close to the tunnel sprue channel, and a knife face parallel to the inner wall intersected with the tunnel sprue channel on the sliding groove is located on the outer side, and therefore it is guaranteed that when the material port is cut off at the knife edge portion, the knife edge of the knife edge portion can slide along the inner wall intersected with the tunnel sprue channel on the sliding groove, the connection portion of a product and the material port can provide supporting force for the material port, the knife edge can be quickly and accurately cut the material port, and therefore the efficiency and the accuracy in material port cutting are high.

Further, the blade section and the fitting section are integrally formed.

The knife edge portion and the matching portion are integrally formed, so that the processing procedure of the knife edge thimble is simplified, the processing cost is reduced, and meanwhile, the knife edge portion and the matching portion are integrally formed, so that the relative position relation between the knife edge portion and the matching portion is accurately controlled, the accuracy of the knife edge thimble is guaranteed, and the material port can be accurately cut off.

Further, a quenching layer is arranged on the knife edge part.

The quenching layer is arranged on the knife edge part, so that the wear resistance of the knife edge part is favorably improved, the service life of the knife edge part is prolonged, and the material port is cut more stably and accurately.

Drawings

Fig. 1 is a longitudinal cross-sectional view of a prior art injection mold taken along a first ejector pin.

Fig. 2 is a longitudinal sectional view along the first ejection rod in a pressure maintaining state in an injection mold for automatically cutting material in the mold according to an embodiment of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a sectional view of fig. 3 in a state of being demolded.

Fig. 5 is a longitudinal sectional view along the first ejection rod of an injection mold for automatic cutting in a mold according to a second embodiment of the present invention under pressure maintaining state.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a die carrier 1, a fixed die 2, a movable die 3, a push plate 4, a driving ejector rod 5, a first ejection push rod 6, a tunnel type pouring inlet 7, a tunnel type pouring inlet channel 8, a straight channel part 9, an inclined transition part 10, a knife edge ejector pin 11, a knife edge part 12, a matching part 13, a first knife face 14, a second knife face 15, a bulge 16, a second ejection push rod 17, a material port 18 and a product 19.

As shown in fig. 1, an injection mold without an in-mold automatic material cutting mechanism in the prior art includes a mold base 1, a fixed mold 2 and a movable mold 3 located below the fixed mold 2 are arranged on the mold base 1, the fixed mold 2 is fixedly connected to the mold base 1 through screws, and a driving mechanism (not shown in the figure) for pushing the movable mold 3 and the fixed mold 2 to mold and open the mold is arranged on the mold base 1.

Example one

In the first embodiment, as shown in fig. 2, 3 and 4, an injection mold for automatically cutting material in a mold is provided with an ejection mechanism on a mold frame 1, the ejection mechanism comprises a push plate 4 vertically connected to the mold frame 1 in a sliding manner and a driving ejector rod 5 fixedly connected to the bottom of the push plate 4 through a screw, and the top of the push plate 4 is fixedly connected with a first ejection push rod 6 for demolding through a screw.

With reference to fig. 2 and 3, the movable mold 3 is provided with a vertically arranged matching hole, a tunnel type pouring inlet 7 is coaxially arranged in the matching hole, the bottom end of the tunnel type pouring inlet 7 is fixedly connected to the movable mold 3 through a screw, and the upper end of the tunnel type pouring inlet 7 passes through the parting surfaces of the movable mold 3 and the fixed mold 2 and then extends into the fixed mold 2, so that correspondingly, the fixed mold 2 is provided with a position avoiding groove matched with the tunnel type pouring inlet 7.

As shown in fig. 3, the tunnel type sprue runner 7 is provided with a tunnel type sprue channel 8, the tunnel type sprue channel 8 communicates the cavity of the molded product 19 with the sprue channel, therefore, the tunnel type sprue channel 8 can be used as a part of the sprue channel, in the rubber material filling stage, the rubber material enters the cavity from the injection port through the sprue channel and the tunnel type sprue channel 8 in sequence, the rubber material is cooled in the cavity under the pressure maintaining condition to form the product 19, and the rubber material in the tunnel type sprue channel 8 and in the sprue channel forms the material port 18. During the drawing of patterns, in order to make things convenient for material mouth 18 can be smoothly by the ejecting tunnel type sprue gate 8 of first ejector push rod 6, tunnel type sprue gate 8 includes straight runner portion 9 and slope transition portion 10, circular arc transition between straight runner portion 9 and the slope transition portion 10, and the low side on slope transition portion 10 inclined plane is close to first ejector push rod 6, when guaranteeing that material mouth 18 is pushed tunnel type sprue gate 8, because there is certain inclination in slope transition portion 10, make material mouth 18 break away from tunnel type sprue gate 8 easily, thereby make material mouth 18 can be pushed tunnel type sprue gate 8 fast.

Referring to fig. 2 and 3, a knife-edge thimble 11 with a square cross section is fixedly connected to the top of the push plate 4 through a screw, a sliding groove with a square cross section is formed in the movable mold 3, the sliding groove is vertically arranged, the knife-edge thimble 11 is vertically and slidably connected in the sliding groove, and the top end of the knife-edge thimble 11 upwards penetrates through the sliding groove and then extends to the pouring runner. As shown in fig. 3, a knife edge portion 12 and a matching portion 13 are integrally formed at the top of the knife edge thimble 11, the matching portion 13 is matched with the bottom surface of the cavity in shape, the knife edge portion 12 is located between the tunnel type sprue gate 8 and the matching portion 13, a quenching layer for enhancing the wear resistance of the knife edge portion 12 is arranged on the knife edge portion 12, and the knife edge of the knife edge portion 12 is flush with the high end of the inclined transition portion 10, so that when rubber material flows through the tunnel type sprue gate 8, the knife edge thimble 11 does not affect the flow of the rubber material.

With reference to fig. 3 and 4, the knife edge portion 12 includes two knife surfaces that are 40 degrees from each other, wherein the knife surface near one side of the first ejector push rod 6 is a first knife surface 14, the other knife surface is a second knife surface 15, the first knife surface 14 and the side wall of the chute near the first ejector push rod 6 are located in the same vertical plane, when demolding is performed, the knife edge thimble 11 moves upward under the pushing of the pushing plate 4, the knife edge portion 12 cuts off the connecting portion between the material opening 18 and the product 19, and the matching portion 13 jacks up the product 19, thereby achieving demolding of the product 19.

As shown in fig. 3, an inclined concave cavity is formed on the upper side of the inclined transition portion 10, and the concave cavity is close to one side of the first ejector push rod 6, so that the material opening 18 formed in the inclined transition portion 10 comprises a protrusion 16, and during demolding, the protrusion 16 can prevent the material opening 18 in the inclined transition portion 10 from moving towards the knife-edge thimble 11 due to the pushing of the first ejector push rod 6, thereby preventing the material opening 18 in the inclined transition portion 10 from obstructing the vertical sliding of the knife-edge thimble 11.

The specific implementation process is as follows:

1. and (3) mold closing and injection process:

as shown in fig. 2 and 3, the movable mold 3 is closed by a driving force of a driving mechanism (not shown), and the movable mold 3 is moved upward to be engaged with the fixed mold 2, and at this time, the tunnel type sprue gate 8 is a part of the sprue gate, and the knife-edge ejector 11 is located at a lower limit position of the runner. After the die assembly is completed, the rubber material is extruded into the pouring runner by the injection port, flows through the pouring runner and the tunnel type pouring runner 8 in sequence and then enters the cavity, pressure maintaining cooling is carried out after the cavity is completely filled with the rubber material, and the rubber material in the cavity is formed into a product 19, and the rubber material in the tunnel type pouring runner 8 and the pouring runner becomes the material port 18.

2. The mold opening process comprises:

after the mold closing and injection process is finished, the driving mechanism (not shown in the figure) pushes the movable mold 3 downwards to enable the movable mold 3 to be far away from the fixed mold 2, and therefore the mold opening of the mold is achieved.

3. And (3) demolding:

after the mold opening is completed, the ejector rod 5 is driven to push the push plate 4 upwards, so that the push plate 4 slides upwards, the push plate 4 drives the first ejection push rod 6 and the knife edge ejector pin 11 to move upwards, and when the knife edge part 12 slides upwards in the sliding groove, as shown in fig. 4, the knife edge part 12 completes the cutting of the material opening 18, and the matching part 13 ejects a product 19 out of the movable mold 3; meanwhile, the first ejection push rod 6 ejects the material port 18 upwards, the material port 18 in the tunnel type sprue channel 8 is separated from the tunnel type sprue channel 8, and the material port 18 is ejected out of the movable die 3, so that the demolding operation is completed.

Example two

The difference between the second embodiment and the first embodiment is that: as shown in fig. 5, if the volume of the product 19 is large, so that the matching part 13 cannot easily demold the product 19, the second ejecting push rod 17 can be fixedly connected to the push plate 4 through a screw, the top of the second ejecting push rod 17 matches the shape of the bottom surface of the cavity, and during demolding, the second ejecting push rod 17 can eject the product 19 upwards out of the movable mold 3, so that demolding is smoothly completed.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures or features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides an injection mould of automatic blank in mould, includes cover half, movable mould and sets up the ejection mechanism who is used for ejecting product and material mouth on the movable mould, its characterized in that: the fixed die and the movable die are in a die assembly state, and the tunnel type pouring inlet channel is superposed with the pouring inlet channel; the tunnel type pouring inlet is internally provided with a chute penetrating through the tunnel type pouring inlet channel, the ejection mechanism is connected with a knife edge thimble, and the knife edge thimble is connected in the chute in a sliding manner.

2. An in-mold auto-blanking injection mold as defined in claim 1, wherein: the tunnel type sprue gate comprises a straight runner part and an inclined transition part, wherein the inclined transition part is positioned between the straight runner part and the knife edge thimble.

3. An in-mold auto-blanking injection mold as defined in claim 2, wherein: the inclined transition part and the straight flow channel part are in arc transition.

4. An in-mold auto-blanking injection mold as set forth in claim 3, wherein: the cross section of the sliding groove is square, and the cross section of the knife edge thimble is square.

5. An in-mold auto-blanking injection mold as set forth in claim 4, wherein: one side of the inclined transition part, which is close to the parting surfaces of the movable mold and the fixed mold, is provided with an inclined concave cavity, and the concave cavity is close to one side of the parting surface and inclines towards the direction of the knife edge thimble.

6. An in-mold auto-blanking injection mold as defined in claim 2, wherein: the knife edge thimble is close to mould parting face one end fixedly connected with sword oral area and cooperation portion, and when movable mould and cover half were in the compound die state, the cutting edge of sword oral area flushed with tunnel type sprue gate, and cooperation portion flushes with the mould parting face.

7. An in-mold auto-blanking injection mold as defined in claim 6, wherein: the knife edge part comprises two knife surfaces which mutually form an included angle of 30-45 degrees.

8. An in-mold auto-blanking injection mold as defined in claim 7, wherein: the knife edge is positioned between the tunnel type sprue channel and the matching part, and the knife face parallel to the inner wall of the chute intersected with the tunnel type sprue channel is positioned on the outer side.

9. An in-mold auto-blanking injection mold as defined in claim 8, wherein: the blade opening part and the matching part are integrally formed.

10. An in-mold auto-blanking injection mold as defined in claim 9, wherein: the knife edge part is provided with a quenching layer.