CN109421203B

CN109421203B - Injection molding apparatus

Info

Publication number: CN109421203B
Application number: CN201710749541.8A
Authority: CN
Inventors: 韦俊军; 林立; 黎猛; 李飞
Original assignee: Shenzhen Silver Basis Technology Co Ltd
Current assignee: Shenzhen Silver Basis Technology Co Ltd
Priority date: 2017-08-28
Filing date: 2017-08-28
Publication date: 2024-05-03
Anticipated expiration: 2037-08-28
Also published as: CN109421203A

Abstract

The invention provides injection molding equipment, which comprises a mold core and a driving device, wherein the mold core comprises: the upper mold shell is provided with an injection molding space, the lower mold shell is matched with the upper mold shell to be matched with the mold, the lower mold shell is provided with a cavity through hole, and a conversion core is arranged in the cavity through hole; and, the driving device includes: the power source assembly comprises a power source body part and a driving rod, wherein the first end of the connecting guide rail is fixedly connected with the end part of the driving rod, the first end of the core connecting assembly is connected with the conversion core, and the second end of the core connecting assembly is propped against the bottom surface of the conversion station groove. The injection molding equipment adopting the technical scheme can solve the technical problems that the first injection molding material and the second injection molding material which cannot be sequentially cast and molded in the same die equipment in the prior art are high in cost, complex in production and preparation procedures and low in production efficiency.

Description

Injection molding apparatus

Technical Field

The invention belongs to the technical field of injection tools, and particularly relates to injection molding equipment.

Background

In order to obtain excellent service performance of injection molding parts, more and more injection molding parts are formed by combining double layers of materials, different functional effects are achieved through two layers of different materials, and the functional effects achieved by the two layers of materials are combined with each other, so that the injection molding parts have excellent service performance which cannot be achieved by the same injection molding part formed by injection molding of a single material.

However, in the prior art, in the process of performing double-layer material combined injection molding, a set of mold equipment is required to be specially prepared and used for injection molding of one material, that is, injection molding is performed to complete injection molding of one double-layer material, at least two sets of mold equipment are required to be combined, after injection molding of a semi-finished product of one material in one set of mold equipment, the semi-finished product is transferred to another set of equipment to perform injection molding of the other material, so as to obtain a finished injection molding of the double-layer material combined injection molding.

In order to improve the preparation processing mode in the prior art, a set of dies is used for completing the double-layer material injection molding required by combining the double-layer material with injection molding, so that the structural form of the die core is changed, and injection cavities required by injection molding of two injection molding materials can be correspondingly formed in the same set of die cores. Obviously, the injection of two injection molding materials must be separated from one another and not simultaneously performed, which requires conversion of the injection cavity formed by the mold core, so that the conversion after injection molding of one injection molding material is completed, forms the injection cavity required for the second injection molding material.

That is, in the process of producing and preparing the injection molding product with the combination of the two layers of materials, the prior art cannot realize sequential casting molding of the first injection molding material and the second injection molding material in the same mold device, so that the defects of high cost, complicated production and preparation procedures and low production efficiency of the mold device in the production and preparation process of the prior art are caused.

Disclosure of Invention

The invention aims to provide injection molding equipment, which solves the technical problems that in the prior art, the first injection molding material and the second injection molding material cannot be sequentially cast and molded in the same mold equipment, so that the mold equipment is high in cost, complex in production and preparation procedures and low in production efficiency.

In order to achieve the above purpose, the invention adopts the following technical scheme: there is provided an injection molding apparatus including a mold core and a driving device, the mold core including: the upper mould shell is provided with an injection molding space; the lower die shell is matched with the upper die shell, a cavity through hole is formed in the lower die shell, and the cavity through hole is arranged opposite to the injection molding space; the conversion core is arranged in the cavity through hole, can slide along the axis direction of the cavity through hole, and the side surface of the conversion core is contacted with the hole wall of the cavity through hole; the conversion core is provided with a first station and a second station, when the conversion core is positioned at the first station, the opening end of the injection molding space is propped against the upper surface of the conversion core to form a first injection molding cavity, and when the conversion core is positioned at the second station, the upper surface of the conversion core, the wall surface of the cavity through hole and the end surface of the opening end of the injection molding space form a second injection molding cavity; the driving device includes: the power source assembly comprises a power source body part and a driving rod, wherein the power source body part is in driving connection with the driving rod, and the power source body part drives the driving rod to stretch and retract along the central axis direction of the power source body part; the connecting guide rail is fixedly connected with the first end of the connecting guide rail and the end part of the driving rod, a conversion station groove is formed in the connecting guide rail, a first bearing station and a second bearing station with different heights are arranged on the bottom surface of the conversion station groove, and the first bearing station and the second bearing station are in smooth transition; the core connecting assembly is connected with the conversion core at the first end, the second end of the core connecting assembly abuts against the bottom surface of the conversion station groove, when the conversion core is located at the first station, the second end of the core connecting assembly is located at the first bearing station, and when the conversion core is located at the second station, the second end of the core connecting assembly is located at the second bearing station.

Further, the mold core further comprises a first auxiliary assembly and a second auxiliary assembly, wherein the first auxiliary assembly and the second auxiliary assembly are oppositely arranged at two sides of the first injection cavity.

Further, the first auxiliary assembly comprises a first auxiliary mounting block and a first type position rod, the first auxiliary mounting block is fixedly mounted between the upper die shell and the lower die shell, a first mounting hole is formed in the first auxiliary mounting block, the first type position rod is inserted into the first mounting hole, and the end part of the first type position rod extends to the first injection molding cavity; the second auxiliary assembly comprises a second auxiliary installation block and a second type position rod, the second auxiliary installation block is fixedly installed between the upper die shell and the lower die shell, a second installation hole is formed in the second auxiliary installation block, the second type position rod is inserted into the second installation hole, the end portion of the second type position rod extends to the first injection molding cavity, and the second type position rod is arranged opposite to the first type position rod.

Further, the mold core further comprises a demolding thimble, a thimble through hole is formed in the mold core connecting assembly, a thimble avoiding groove is formed in the conversion mold core, and the demolding thimble sequentially penetrates through the thimble through hole and the thimble avoiding groove.

Further, one conversion core is correspondingly provided with two demolding ejector pins, wherein one demolding ejector pin corresponds to the position of the first type position rod extending to the end part of the first injection molding cavity, and the other demolding ejector pin corresponds to the position of the second type position rod extending to the end part of the first injection molding cavity.

Further, the conversion station groove is a through groove formed in the connecting guide rail, wherein the core connecting assembly comprises a core supporting piece and a connecting pin, the first end of the core supporting piece is connected with the conversion core, the second end of the core supporting piece is provided with a first connecting lug and a second connecting lug, a containing space is formed between the first connecting lug and the second connecting lug, the connecting guide rail is located in the containing space, the connecting pin penetrates through the through groove, the connecting pin abuts against the bottom surface of the through groove, and two ends of the connecting pin are connected with the first connecting lug and the second connecting lug respectively.

Further, in the horizontal direction parallel to the central axis of the connecting pin, the profile shape of the through groove is waist-shaped, and the bottom surface of the through groove between the first bearing station and the second bearing station is an arc surface.

Further, the driving device further comprises a limiting structure, the limiting structure is electrically connected with the power source body part, and the limiting structure is used for detecting the telescopic displacement of the connecting guide rail along the horizontal direction of the central axis of the connecting guide rail and controlling the power source body part to be closed according to the detected telescopic displacement.

Further, the limit structure includes: the controller is electrically connected with the power source body part; the first end of the auxiliary connecting rod is fixedly connected with the second end of the connecting guide rail, and the second end of the auxiliary connecting rod is provided with a displacement measuring groove; the detection end of the detection sensor is in contact with the wall of the first side groove of the displacement measuring groove when the connecting pin is located at the second bearing station, and the detection end of the detection sensor is in contact with the wall of the second side groove of the displacement measuring groove when the connecting pin is located at the first bearing station.

Further, the driving device further comprises a guide rail supporting table, the bottom surface of the connecting guide rail is supported on the top surface of the guide rail supporting table, the connecting guide rail is slidably arranged relative to the guide rail supporting table, a guide groove is formed in the guide rail supporting table, a guide block is arranged on the bottom surface of the connecting guide rail, and the guide block is located in the guide groove.

In the production and processing process of injection molding products, the driving device in the injection molding equipment is used for driving and converting the converting core of the mold core, so that the converting core can form a first injection molding cavity with the upper shell of the mold, after the converting core is driven and converted, the upper surface of the converting core, the wall surface of the cavity through hole and the end face of the opening end of the injection molding space form a second injection molding cavity, and then the first injection molding cavity and the second injection molding cavity are respectively cast with a first injection molding material and a second injection molding material, thereby preparing injection molding products for forming double-layer injection molding material combined molding, and successfully solving the technical problems that the first injection molding material and the second injection molding material can not be sequentially cast in the same mold equipment in the prior art, and the mold equipment has high cost, complicated production and preparation procedures and low production efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first exploded construction of an injection molding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view showing an exploded structure of a mold core of an injection molding apparatus according to an embodiment of the present invention;

FIG. 3 is an exploded view of a driving device of an injection molding apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic view of a second exploded construction of an injection molding apparatus according to an embodiment of the present invention;

Fig. 5 is a schematic view of a third exploded structure of an injection molding apparatus according to an embodiment of the present invention.

Wherein, each reference sign in the figure:

100. A mold core; 110. a mold upper shell; 111. an injection molding space; 120. a lower mold shell; 121. a cavity through hole; 130. converting the core; 131. the thimble dodges the groove; 141. a first auxiliary component; 142. a second auxiliary component; 1411. a first auxiliary mounting block; 1412. a first positioning rod; 1421. a second auxiliary mounting block; 1422. a second type position rod; 200. a driving device; 210. a power source assembly; 211. a power source body portion; 212. a driving rod; 213. an adapter; 214. an oil inlet pipe; 215. an oil return pipe; 220. a connecting guide rail; 221. a switching station groove; 222. a guide block; 2211. a first load-bearing station; 2212. a second load-bearing station; 230. a core connection assembly; 231. thimble via holes; 232. a core support; 233. a connecting pin; 234. a connecting bolt; 2321. a first connection lug; 2322. a second connecting ear; 240. a limit structure; 241. an auxiliary connecting rod; 242. a detection sensor; 2410. a displacement measurement groove; 250. a guide rail support; 251. a guide groove; 410. a first casting system; 411. a first sprue; 412. a first glue outlet nozzle; 420. a second casting system; 421. a second sprue; 422. a second glue outlet nozzle; 223. a protrusion; 300. and (5) injection molding a product.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As shown in fig. 1, the injection molding apparatus of the present embodiment includes a mold core 100 and a driving device 200, wherein the mold core 100 includes a mold upper shell 110, a mold lower shell 120, and a conversion core 130, and the driving device 200 includes a power source assembly 210, a connection rail 220, and a core connection assembly 230. In the injection molding device, an injection molding space 111 is arranged on a mold upper shell 110, a mold lower shell 120 is matched with the mold upper shell 110, a cavity through hole 121 is arranged on the mold lower shell 120, the cavity through hole 121 is opposite to the injection molding space 111, a conversion core 130 is arranged in the cavity through hole 121, the conversion core 130 can slide along the axial direction of the cavity through hole 121, the side surface of the conversion core 130 is contacted with the wall of the cavity through hole 121, the conversion core 130 is provided with a first station and a second station, when the conversion core 130 is positioned at the first station, the opening end of the injection molding space 111 is abutted against the upper surface of the conversion core 130 to form a first injection molding cavity, when the conversion core 130 is positioned at the second station, the upper surface of the conversion core 130, the wall surface of the cavity through hole 121 and the end surface of the opening end of the injection molding space 111 form a second injection molding cavity, the power source assembly 210 comprises a power source body 211 and a driving rod 212, the power source body 211 is connected with the driving rod 212 in a driving way, the driving rod 212 is driven by the power source body 211 to move in a telescopic way along the central axis direction of the power source body, the first end of the connecting guide rail 220 is fixedly connected with the end part of the driving rod 212, the connecting guide rail 220 is provided with a conversion station groove 221, the bottom surface of the conversion station groove 221 is provided with a first bearing station 2211 and a second bearing station 2212 with different heights, the first bearing station 2211 and the second bearing station 2212 are in smooth transition, the first end of the core connecting assembly 230 is connected with the conversion core 130, the second end of the core connecting assembly 230 is propped against the bottom surface of the conversion station groove 221, when the conversion core 130 is positioned at the first station, the second end of the core connecting assembly 230 is positioned at the first bearing station 2211, when the conversion core 130 is positioned at the second station, a second end of the core connection assembly 230 is located at a second load station 2212.

In the process of manufacturing the injection-molded product 300, the conversion core of the mold core 100 is driven and converted by using the driving device in the injection molding apparatus, so that the conversion core can form a first injection cavity with the mold upper shell, after the conversion core is driven and converted, the upper surface of the conversion core 130, the wall surface of the cavity through hole 121 and the end surface of the open end of the injection space 111 form a second injection cavity, and then the first injection cavity and the second injection cavity are respectively cast with the first injection material and the second injection material, thereby manufacturing the injection-molded product 300 formed by combining the two layers of injection materials. When the first injection molding material is injected, the second end of the core connecting assembly 230 is located at the first carrying station 2211, at this time, a first injection cavity is formed between the conversion core 130 located at the first station and the injection space 111 of the upper mold shell 110, a hard plastic material injection molding part is formed in the first injection cavity, after the injection molding process of the first injection molding material is completed and the driving device is started, the power source body 211 drives the driving rod 212 to extend along the central axis direction of the driving rod 212 to push for a predetermined displacement amount, so that the connecting guide rail 220 also moves along with the driving rod 212 to generate a predetermined displacement amount, at this time, the core connecting assembly 230 and the mold core 100 are kept fixed in the central axis direction of the connecting guide rail 220, and the second end of the core connecting assembly 230 is converted to the second carrying station 2212 by the first carrying station 2211, at this time, the core connecting assembly 230 and the mold core 100 are lowered by a predetermined height in the vertical direction under the action of gravity, so that the displacement amount of the connecting guide rail 220 horizontally moves along the central axis of the driving device is converted into the displacement amount of the core connecting assembly 230 in the vertical direction, namely, the conversion core 130 slides to the second injection molding part to form a soft plastic material injection molding part in the second injection molding part, and the soft plastic material injection molding part is formed in the second injection molding part.

As shown in fig. 2, in the present embodiment, an even number of injection molding spaces 111 are provided on the upper mold shell 110, specifically, the upper mold shell 110 in the present embodiment has four injection molding spaces 111 arranged in a straight line, the outline shapes of two adjacent injection molding spaces 111 are symmetrically arranged, cavity through holes 121 corresponding to the even number of injection molding spaces 111 one by one are provided on the lower mold shell 120, a conversion core 130 is installed in each cavity through hole 121, and two adjacent conversion cores 130 are symmetrically arranged. In this way, the mold core 100 can realize one-time mold clamping, so that a plurality of injection molding products 300 can be prepared and molded at the same time, and the production efficiency of the injection molding products 300 can be further improved.

And, as shown in fig. 1,3, 4 and 5, the connection between the driving rod 212 and the connection rail 220 is achieved through the adapter 213, so that the assembly between the connection rail 220 and the driving rod 212 is facilitated, and when the power source assembly 210 malfunctions and needs to be maintained or replaced, the power source assembly 210 can be conveniently detached from the connection rail 220 by detaching the adapter 213 and then maintained or replaced.

The power source assembly 210 used in the present embodiment is a hydraulic driving assembly, where the power source body 211 is a hydraulic cylinder, the hydraulic cylinder is provided with an oil inlet pipe 214 and an oil return pipe 215, and the hydraulic oil is pumped to the oil inlet pipe 214 by an oil pump and the oil return of the oil return pipe 215 is controlled by a control electromagnetic valve, so as to implement the telescopic movement of the driving rod 212.

As shown in fig. 1, fig. 3, fig. 4 and fig. 5, the converting station groove 221 is a through groove formed on the connecting rail 220, wherein the core connecting assembly 230 includes a core support 232 and a connecting pin 233, a first end of the core support 232 is connected with the converting core 130, specifically, a first end of the core support 232 is fixedly connected with the converting core 130 through a connecting bolt 234, a second end of the core support 232 is provided with a first connecting lug 2321 and a second connecting lug 2322, a containing space is formed between the first connecting lug 2321 and the second connecting lug 2322, the connecting rail 220 is located in the containing space, the connecting pin 233 passes through the through groove, the connecting pin 233 abuts against the bottom surface of the through groove, and two ends of the connecting pin 233 are respectively connected with the first connecting lug 2321 and the second connecting lug 2322. The connecting guide rail 220 is limited by the accommodating space formed between the first connecting lug 2321 and the second connecting lug 2322, so that the connecting guide rail 220 cannot be offset from the core support 232 in the telescopic movement process, the connecting guide rail 220 is ensured to be always positioned under the core support 232, and the connecting guide rail 220 is enabled to stably support the core support 232. In addition, the connecting pin 233 of the present embodiment is a cylindrical pin, and in the process that the connecting pin 233 is abutted against the bottom surface of the converting station slot 221 and the connecting pin 233 slides on the bottom surface of the converting station slot 221, the scratch damage of the connecting pin 233 to the bottom surface of the converting station slot 221 is eliminated, and the service life of the connecting rail 220 is prolonged.

In the process of making the conversion core 130 convert between the first station and the second station, the operation and control are performed through the core connection assembly of the driving device, in this embodiment, the core connection assembly is inserted into the cavity through hole 121, the first end of the core connection assembly supports the conversion core 130, the second end of the core connection assembly penetrates out of the cavity through hole 121 to extend to the outside, and the conversion core 130 slides synchronously with the core connection assembly.

In the direction perpendicular to the central axis of the connecting pin 233, the two stations are respectively located at two ends of the through groove, specifically, the profile shape of the through groove is waist-shaped, and the bottom surface of the through groove between the first bearing station and the second bearing station is arc-shaped, so that smoothness of sliding of the connecting pin 233 on the bottom surface of the through groove is further ensured, and movement of the core connecting assembly 230 in the process of converting the stations is smooth and free of resistance.

In order to accurately realize the displacement of the power source assembly 210 to drive the connecting rail 220 to move along the central axis direction thereof, the connecting pins 233 of the core connecting assembly 230 can be accurately switched between the first bearing station and the second bearing station, so that the connecting rail 220 still continues to generate the movement trend along the central axis direction thereof to generate the action stress on the connecting pins 233 after the connecting pins 233 of the core connecting assembly 230 are switched from the first station to the second station, and the mold core 100 is protected from being damaged under the continuous action of the action stress. Therefore, the driving device further includes a limiting structure 240, where the limiting structure 240 is electrically connected to the power source body 211, and the limiting structure 240 is used to detect the telescopic displacement of the connecting rail 220 along the self axis direction, and control the power source body 211 to be closed according to the detected telescopic displacement.

Specifically, as shown in fig. 1, 3, 4 and 5, the limiting structure 240 of the present embodiment includes a controller (not shown), an auxiliary connecting rod 241 and a detection sensor 242, the controller is electrically connected with the power source body 211, a first end of the auxiliary connecting rod 241 is fixedly connected to a second end of the connecting rail 220, the second end of the auxiliary connecting rod 241 is provided with a displacement measurement groove 2410, the detection sensor 242 is electrically connected with the controller, a detection end of the detection sensor 242 is located in the displacement measurement groove 2410, when the connecting pin 233 is located at the first bearing station, the detection end of the detection sensor 242 is in contact with a first side groove wall of the displacement measurement groove 2410, and when the connecting pin 233 is located at the second bearing station, the detection end of the detection sensor 242 is in contact with a second side groove wall of the displacement measurement groove 2410.

In this embodiment, in order to stably support the vertical action exerted by the core connection assembly 230 (mainly, the gravity action of the core connection assembly 230 and the mold core 100), the driving device further includes a rail support table 250, the bottom surface of the connection rail 220 is supported on the top surface of the rail support table 250, and the connection rail 220 is slidably disposed with respect to the rail support table 250. Specifically, the guide rail supporting table 250 is provided with a guide groove 251, the bottom surface of the connecting guide rail 220 is provided with a guide block 222, the guide block 222 is located in the guide groove 251, and the telescopic movement direction of the connecting guide rail 220 is further limited by combining the accommodating space formed between the first connecting lug 2321 and the second connecting lug 2322 through the cooperation between the guide block 222 and the guide groove 251.

Preferably, the mold core 100 further includes a first auxiliary assembly 141 and a second auxiliary assembly 142, the first auxiliary assembly 141 being mounted on both sides of the first injection cavity opposite the second auxiliary assembly 142. Specifically, the first auxiliary assembly 141 includes a first auxiliary mounting block 1411 and a first positioning rod 1412, the second auxiliary assembly 142 includes a second auxiliary mounting block 1421 and a second positioning rod 1422, the first auxiliary mounting block 1411 is fixedly mounted between the upper mold shell 110 and the lower mold shell 120, the first auxiliary mounting block 1411 is provided with a first mounting hole, the first positioning rod 1412 is inserted into the first mounting hole, an end portion of the first positioning rod 1412 extends to the first injection cavity, the second auxiliary mounting block 1421 is fixedly mounted between the upper mold shell 110 and the lower mold shell 120, the second auxiliary mounting block 1421 is provided with a second mounting hole, the second positioning rod 1422 is inserted into the second mounting hole, and an end portion of the second positioning rod 1422 extends to the first injection cavity, and the second positioning rod 1422 is disposed opposite to the first positioning rod 1412. In the injection molding process, the end of the first type position rod 1412 and the end of the second type position rod 1422 are used as components of the cavity wall of the first injection cavity, in the injection molding process of the hard plastic material injection molding, the position of the end of the first type position rod 1412 is formed into one end of the hard plastic material injection molding, and the position of the end of the second type position rod 1422 is formed into the other end of the hard plastic material injection molding. Because the end of the first molding rod 1412 and the end of the injection molded piece of hard plastic material molded at the end of the second molding rod 1422 are injection molded pieces having a groove structure, after the mold is opened, the first molding rod 1412 needs to be pulled out from the first mounting hole of the first auxiliary mounting block 1411, the second molding rod 1422 needs to be pulled out from the second mounting hole of the second auxiliary mounting block 1421, and then the injection molded product 300 can be removed from the mold core 100.

After the hard plastic material injection molding and the soft plastic material injection molding are completed and the combination molding between the hard plastic material injection molding and the soft plastic material injection molding is completed to form the injection molding product 300, the mold core 100 needs to be opened, the mold upper shell 110 and the mold lower shell 120 are separated from each other, at this time, the injection molding product 300 remains on the mold lower shell 120 under the action of the mold stress (the mold stress is a stress distribution difference value formed in the process of designing the first injection cavity and the second injection cavity for forming the mold core 100, i.e. the stress action between the mold lower shell 120 and the injection molding product 300 is designed to be greater than the stress action between the mold upper shell 110 and the injection molding product 300, so that the injection molding product 300 remains on the mold lower shell 120 after the mold opening), and at this time, the injection molding product 300 is ejected from the mold lower shell 120 through the ejector pins (not shown). In this embodiment, the core support is provided with a thimble via 231, the conversion core 130 is provided with a thimble avoiding groove 131, and the demolding thimble sequentially passes through the thimble via 231 and the thimble avoiding groove 131. In order to enable the injection molding product 300 to be uniformly forced to be ejected out of the lower mold shell 120 during the ejection operation of the ejector pins on the injection molding product 300, therefore, one of the conversion cores 130 in the mold core 100 of the embodiment is correspondingly provided with two ejector pins, that is, two ejector pins are correspondingly used for ejecting each injection molding product 300, one ejector pin corresponds to a position of the first mold rod 1412 extending to an end portion of the first injection cavity, and the other ejector pin corresponds to a position of the second mold rod 1422 extending to an end portion of the first injection cavity. In this way, in the process of ejecting the injection molding product 300 out of the lower mold shell 120, the two demolding ejector pins respectively eject and apply force to the two ends of the injection molding product 300, and as the two force application effects are opposite and uniform, the injection molding product 300 can slowly and uniformly deviate from the lower mold shell 120, so that the demolding of the injection molding product 300 is completed, and the integrity of the injection molding product 300 after demolding is ensured.

In this embodiment, the upper surface of the connection rail 220 is provided with a protrusion 223 corresponding to the conversion station slot 221, the horizontal top surface of the protrusion 223 is disposed corresponding to the conversion core 130 at the first station, and the second end of the core support 232 is provided with a mating protrusion (not shown), when the conversion core 130 is located at the first station, the end surface of the mating protrusion abuts against the horizontal top surface of the protrusion 223, and when the conversion core is located at the second station, the end surface of the mating protrusion and the horizontal top surface of the protrusion are staggered, and at this time, the end surface of the mating protrusion abuts against the top surface of the connection rail 220. In this way, the core support 232 forms two supporting force structures that assist each other when the conversion core 130 is located at the first station or the second station by the engagement between the end of the second end thereof and the corresponding bearing station and the engagement between the protrusion 223 and the engagement protrusion, the engagement between the protrusion 223 and the top surface of the connection rail 220, so that the conversion core 130 can be kept stable.

In the casting operation process, the injection molding device performs casting operation on the first injection molding material and the second injection molding material through the first casting system 410 and the second casting system 420 respectively. The first pouring system 410 is provided with a first pouring gate 411 and a first glue outlet nozzle 412, a first pouring channel is formed by communicating the first pouring gate 411 with the first glue outlet nozzle 412, the first glue outlet nozzle 412 is connected to the upper mold shell 110, and the first glue outlet nozzle 412 is communicated with the injection molding space, so as to realize the casting molding operation of the first injection molding material. The second pouring system 420 is independent of the first pouring system 410, the second pouring system 420 is provided with a second pouring opening 421 and a second glue outlet 422, a second pouring channel is formed by communication between the second pouring opening 421 and the second glue outlet 422, the second glue outlet 422 is connected to the upper die shell 110, the second glue outlet 422 is avoided from opening an injection molding space, when the upper surface of the die core 100 is abutted against the opening end of the injection molding space to form a first injection molding cavity, the second glue outlet 422 is abutted against the upper surface of the die core 100 to close the second glue outlet 422, and when the second end of the core connecting assembly 230 is switched to another station to enable the die core 100 to assist in forming a second injection molding cavity, the upper surface of the die core 100 is separated from the second glue outlet 422 to enable the second glue outlet 422 to be opened, and a second injection molding material operation is performed. Thus, the injection molded article 300 of the two injection molding materials combined with the injection molding is completed.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. An injection molding apparatus comprising a mold core and a drive device, characterized in that,

The mold core includes:

The upper mould shell is provided with an injection molding space;

the lower die shell is matched with the upper die shell for die assembly, a cavity through hole is formed in the lower die shell, and the cavity through hole is arranged opposite to the injection molding space;

the conversion core is arranged in the cavity through hole, can slide along the axis direction of the cavity through hole, and the side surface of the conversion core is contacted with the hole wall of the cavity through hole;

The conversion core is provided with a first station and a second station, when the conversion core is positioned at the first station, the opening end of the injection molding space is propped against the upper surface of the conversion core to form a first injection molding cavity, and when the conversion core is positioned at the second station, the upper surface of the conversion core, the wall surface of the cavity through hole and the end surface of the opening end of the injection molding space form a second injection molding cavity;

the driving device includes:

The power source assembly comprises a power source body part and a driving rod, wherein the power source body part is in driving connection with the driving rod, and the power source body part drives the driving rod to stretch and retract along the central axis direction of the driving rod;

the connecting guide rail is fixedly connected with the end part of the driving rod, a conversion station groove is formed in the connecting guide rail, a first bearing station and a second bearing station with different heights are arranged on the bottom surface of the conversion station groove, and the first bearing station and the second bearing station are in smooth transition;

The core coupling assembling, core coupling assembling's first end with the conversion core is connected, core coupling assembling's second end support in on the bottom surface of conversion station groove, works as the conversion core is located when first station, core coupling assembling's second end is located on the first loading end, works as the conversion core is located when the second station, core coupling assembling's second end is located on the second loading end, conversion station groove is for seting up link up the groove that link up on the guide rail, wherein, core coupling assembling includes core support and connecting pin post, core support's first end with the conversion core is connected, core support's second end is equipped with first engaging lug and second engaging lug, first engaging lug with form the accommodation space between the second engaging lug, the guide rail is located in the accommodation space, the connecting pin post passes link up the groove, the connecting pin post support in on the bottom surface of link up groove, and the connecting pin support the guide rail is equipped with respectively with the guide rail is equipped with the guide rail is connected with the guide rail, the guide rail is equipped with the guide rail.

2. The injection molding apparatus of claim 1 wherein the mold core further comprises a first auxiliary assembly and a second auxiliary assembly, the first auxiliary assembly being mounted on opposite sides of the first injection cavity from the second auxiliary assembly.

3. The injection molding apparatus of claim 2, wherein the injection molding apparatus comprises,

The first auxiliary assembly comprises a first auxiliary mounting block and a first type position rod, the first auxiliary mounting block is fixedly mounted between the upper die shell and the lower die shell, a first mounting hole is formed in the first auxiliary mounting block, the first type position rod is inserted into the first mounting hole, and the end part of the first type position rod extends to the first injection cavity;

The second auxiliary assembly comprises a second auxiliary installation block and a second type position rod, the second auxiliary installation block is fixedly installed between the upper die shell and the lower die shell, a second installation hole is formed in the second auxiliary installation block, the second type position rod is inserted into the second installation hole, the end portion of the second type position rod extends to the first injection molding cavity, and the second type position rod and the first type position rod are oppositely arranged.

4. The injection molding apparatus of claim 3 wherein said mold core further comprises a stripper pin, said core connection assembly having a pin access opening, said conversion core having a pin access opening, said stripper pin passing through said pin access opening and said pin access opening in sequence.

5. The injection molding apparatus of claim 4, wherein one of said transition cores is provided with two said ejector pins, one of said ejector pins corresponding to a position of said first mold pin extending to an end of said first injection cavity and the other of said ejector pins corresponding to a position of said second mold pin extending to an end of said first injection cavity.

6. The injection molding apparatus of claim 1, wherein the through slot has a waist-shaped profile in a horizontal direction parallel to a central axis of the connecting pin, and a bottom surface of the through slot between the first load bearing station and the second load bearing station is an arcuate surface.

7. The injection molding apparatus of claim 1 or 6, wherein the driving device further comprises a limit structure electrically connected to the power source body portion, the limit structure being configured to detect an amount of telescopic displacement of the connecting rail in a horizontal direction along a central axis thereof, and to control the power source body portion to be closed according to the detected amount of telescopic displacement.

8. The injection molding apparatus of claim 7, wherein the limit structure comprises:

the controller is electrically connected with the power source body part;

The first end of the auxiliary connecting rod is fixedly connected with the second end of the connecting guide rail, and the second end of the auxiliary connecting rod is provided with a displacement measuring groove;

the detection sensor is electrically connected with the controller, the detection end of the detection sensor is located in the displacement measuring groove, when the connecting pin is located at the first bearing station, the detection end of the detection sensor is in contact with the first side groove wall of the displacement measuring groove, and when the connecting pin is located at the second bearing station, the detection end of the detection sensor is in contact with the second side groove wall of the displacement measuring groove.