CN115742170A - Injection molding structure, injection molding machine with structure and injection molding method of injection molding machine - Google Patents

Abstract

The invention relates to an injection molding structure, an injection molding machine with the structure and an injection molding method of the injection molding machine, wherein the structure comprises an injection main shaft and an outer shaft barrel which is sleeved on the injection main shaft in a sliding way; an injection channel penetrating through the two ends of the injection main shaft is axially arranged in the injection main shaft; the injection main shaft is provided with an injection screw which extends into the injection channel and pushes the rubber material out downwards, the outer side wall of the injection main shaft is provided with an annular groove, the annular groove is communicated with the injection channel through a material feeding channel, the outer shaft barrel is provided with a feeding window communicated with the annular groove, and the axial length of the annular groove is greater than the stroke of the injection main shaft and the axial length of the feeding window; the feeding device also comprises a heating sleeve and a feeding assembly arranged corresponding to the feeding window; the lower end of the injection main shaft extends out of the outer shaft barrel, and the heating sleeve is coaxially sleeved on the lower end of the injection main shaft; according to the invention, the injection main shaft and the outer shaft barrel can realize independent operation of injection and feeding, so that the feed hopper mechanism is prevented from moving along with the injection main shaft, and the feeding is greatly facilitated at any time in the production process.

Description

Injection molding structure, injection molding machine with structure and injection molding method of injection molding machine

Technical Field

The invention relates to the technical field of injection molding machines, in particular to an injection molding structure, an injection molding machine with the structure and an injection molding method of the injection molding machine.

Background

An injection molding machine, also known as an injection molding machine or an injection molding machine, is a main molding device for molding thermoplastic plastics or thermosetting plastics into plastic products of various shapes by using a plastic molding mold. The device is divided into a vertical type, a horizontal type and a full-electric type. Injection molding machines can heat plastic, apply high pressure to the molten plastic, and cause it to be injected to fill the mold cavity, an injection molding process that provides the ability to mass produce complex parts in a precise manner. And more injection molding machines have been used for the machining of micro-parts, particularly vertical injection molding machines, which generally comprise a horizontally or vertically mounted injection device and a vertically oriented clamping system supporting a mold comprising an upper mold and a lower mold under a force sufficient to resist the pressure generated by the molten material, the combination of the relative vertical movement between the upper and lower molds defining an injection mold cavity into which molten glue can be injected, and after the part has cooled and solidified, opening the mold and allowing the part to be removed.

Present injection molding machine is because last mould need go up and down to open and shut with the realization and lower mould, this makes injection conveying pipeline also need reciprocate in the lump with last mould, just so can guarantee that the sizing material lasts to pour into in the die cavity between mould and the lower mould, and injection conveying pipeline is fixed with feeder hopper mechanism again, consequently the material loading mode of this kind of structure is because feeder hopper mechanism is portable movable, inconvenient feed supplement very much in actual production, consequently, in order to solve above-mentioned problem, convenient feed supplement at any time, I department proposes a brand-new vertical injection molding machine solution specially.

Disclosure of Invention

The invention aims to provide an injection molding structure, an injection molding machine with the structure and an injection molding method of the injection molding machine, aiming at the defects of the prior art.

In order to meet the above requirements, the technical scheme adopted by the invention for solving the technical problems is as follows:

the injection molding structure is characterized by comprising an injection main shaft and an outer shaft barrel, wherein the outer shaft barrel is sleeved on the injection main shaft in a sliding manner; an injection channel penetrating through two ends of the injection main shaft is axially arranged in the injection main shaft;

the injection main shaft is provided with an injection channel, the injection channel is communicated with the injection main shaft through a feeding channel, the outer shaft barrel is provided with a feeding window communicated with the annular groove, and the axial length of the annular groove is greater than the stroke of the injection main shaft and the axial length of the feeding window;

the feeding device also comprises a heating sleeve and a feeding assembly arranged corresponding to the feeding window; the lower end of the injection main shaft extends out of the outer shaft barrel, and the heating sleeve is coaxially sleeved on the lower end of the injection main shaft.

The injection molding structure is characterized in that the feeding channels are located on the inner wall of the lower end of the annular groove, and the feeding channels are distributed annularly.

According to the injection molding structure, the inner diameter of the inlet of each material feeding channel is larger than the depth of the annular groove, and the inlets of two adjacent material feeding channels are directly communicated with each other.

The injection structure is characterized in that the feeding window is inclined, and the lower end of the feeding window is communicated with the annular groove.

The injection molding structure comprises a feeding assembly, a feeding assembly and a discharging assembly, wherein the feeding assembly comprises a screw rod pushing pipe unit inserted into a feeding window, a driving unit for providing power for the screw rod pushing pipe unit, and a hopper for feeding the screw rod pushing pipe unit; the screw rod pushing pipe unit comprises a feeding pipe extending into the feeding window and a pushing screw rod arranged in the feeding pipe; and the discharge port of the hopper is communicated with the feeding pipe, and when the hopper is assembled in place, the lower end of the pushing screw rod is inclined downwards.

The injection molding machine comprises a lower template, an upper template and a bracket, the lower end of the injection main shaft is connected to an injection port of the upper template, and the outer shaft barrel and the feeding assembly are fixed on the bracket; and the bracket is also provided with a lifting mechanism for driving the injection main shaft to move up and down and a rotating mechanism for driving the injection screw to rotate.

The injection molding machine with the injection molding structure is characterized in that the lifting mechanism is a double-head cylinder, a movable terminal at the upper end of the lifting mechanism is connected with the injection main shaft through a connecting frame, a movable terminal at the lower end of the lifting mechanism is connected with the upper template, and the rotating mechanism is arranged on the connecting frame.

The injection molding machine with the injection molding structure is characterized in that two lifting mechanisms are arranged and are respectively arranged on two opposite sides of the injection main shaft.

The injection molding machine with the injection molding structure is characterized in that the bracket is also provided with a guide assembly for preventing a movable terminal at the lower end of the lifting mechanism from being inclined.

Also provided is an injection molding method of an injection molding machine having the above injection molding structure, the method comprising the steps of:

the injection main shaft is butted in place with a glue injection port of the mold;

the injection main shaft moves in place, so that the annular groove is opposite to the feeding window;

the feeding assembly acts and sends the rubber material into the annular groove through the feeding window and enters the injection channel, and the injection screw pushes the rubber material downwards;

the heating sleeve heats the rubber material pushed by the injection screw to a molten state;

the injection screw injects molten rubber material into the mold.

The invention has the beneficial effects that: through the relative activity setting of injection main shaft and outer shaft tube, can realize the injecting glue of injection main shaft and the continuous material loading independent operation of material loading subassembly, mutual noninterference can be fixed with the material loading subassembly, and then can make things convenient for the operation of material loading at any time in the production process greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts based on the drawings:

FIG. 1 is a cross-sectional view of an injection molded structure according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state of a main injection shaft of an injection molding structure in a descending state according to an embodiment of the present invention.

Fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is a sectional view B-B of fig. 3.

Fig. 5 is a front view of the entire structure of the injection molding machine according to the second embodiment of the present invention.

Fig. 6 is a side view showing the overall structure of the injection molding machine according to the second embodiment of the present invention.

FIG. 7 is a flowchart of an injection molding method of an injection molding machine according to a third embodiment of the present invention.

Detailed Description

The terms "first," "second," "third," and "fourth," etc. in the description and claims of the invention and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

"plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Also, the terms "upper, lower, left, right, upper, lower, longitudinal" and the like, which denote orientation, are used with reference to the attitude and position of the device or apparatus in the present disclosure during normal use.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will be made clearly and completely in conjunction with the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.

The first embodiment is as follows:

fig. 1 to 4 show an injection molding structure provided in the first embodiment of the present invention, and for convenience of description, only the portions related to the first embodiment of the present invention are shown, which are detailed as follows:

the injection molding structure comprises a cylindrical injection main shaft 1 and an outer shaft barrel 2 which is sleeved on the injection main shaft 1 in a sliding manner; when the injection mould is assembled in place, the outer shaft barrel 2 is tightly attached to the injection main shaft 1 in a sliding manner, wherein an injection channel 3 penetrating through two ends of the injection main shaft 1 is axially arranged in the injection main shaft 1 so as to convey rubber materials into the mould;

the injection molding structure further comprises an injection screw 4 extending into the injection channel 3 to push the rubber material out downwards, and concretely, the lower end of the injection screw 4 is provided with a spiral rotary vane, the upper end of the injection screw penetrates out of the injection channel 3 and is in close sliding fit with the injection channel 3, and further, the upper end of the injection screw 4 is also provided with a sealing ring to isolate the injection channel 3 from external sealing, further, the outer side wall of the injection main shaft 1 is provided with a ring groove 5, the ring groove 5 is communicated with the injection channel 3 through a material feeding channel 6, the outer shaft 2 is provided with a feeding window 7 communicated with the ring groove 5, when feeding, the rubber material enters the ring groove 5 through the feeding window 7 and enters the injection channel 3 through the material feeding channel 6, and then the rubber material is pushed downwards by the injection screw 4 to realize continuous feeding, and the axial length of the ring groove 5 is greater than the stroke of the injection main shaft 1 and the axial length of the feeding window 7 along the injection main shaft 1, so that when the injection main shaft 1 moves upwards and downwards, the rubber injection main shaft can continuously enter the ring groove 5 to the mold to supplement the rubber material, and the rubber injection main shaft, and the feeding window 7 is prevented from being completely misplaced and causing material breaking;

the injection molding structure also comprises a heating sleeve 8 and a feeding assembly 9 which is arranged corresponding to the feeding window 7; the lower end of the injection main shaft 1 extends out of the outer shaft barrel 2, the heating sleeve 8 is coaxially sleeved on the lower end of the injection main shaft 1 to heat and melt the rubber material entering the injection channel 3, and further, an injection nozzle 10 is further arranged on the lower end of the injection main shaft 1 and below the heating sleeve 8 and used for being in butt joint with a rubber injection port of a mold.

Preferably, the feeding channel 6 is located on the inner wall of the lower end of the annular groove 5, and the feeding channels 6 are annularly distributed to ensure the feeding speed and avoid the occurrence of material blockage of the single feeding channel 6.

Preferably, the inner diameter of the inlet of the material feeding channel 6 is greater than the depth of the annular groove 5, that is, greater than the length of the inner wall of the annular groove 5 in the radial direction of the injection main shaft 1, specifically, the inlet of the material feeding channel 6 is arranged towards the axial direction of the injection main shaft 1, so that a vacant site is reserved on the outer side wall of the injection main shaft 1, the inlets of two adjacent material feeding channels 6 are directly communicated with each other, specifically, an inverted V-shaped protrusion 11 is arranged at the middle position of the two adjacent inlets, and guide inclined planes 111 are arranged on the protrusions 11 corresponding to the inlets on the two sides of the protrusions, so that the rubber material smoothly enters the material feeding channel 6, and the risk of material blockage is reduced.

Preferably, the inlet window 7 is inclined and its lower end communicates with the annular groove 5, so that the material falls into the annular groove 5.

Preferably, the feeding assembly 9 comprises a screw pushing pipe unit 91 inserted into the feeding window 7, a driving unit 92 for providing power for the screw pushing pipe unit 91, and a hopper 93 for feeding the screw pushing pipe unit 91; the screw pushing pipe unit 91 comprises a feeding pipe 911 extending into the feeding window 7 and a pushing screw 912 extending into the feeding pipe 911, and is used for driving the pushing screw 912 to rotate so as to continuously push the rubber material into the annular groove 5; a discharge port 931 of the hopper 93 is communicated with the feeding pipe 911, and when the hopper is assembled in place, the lower end of the pushing screw 912 is inclined downward, wherein the driving unit 92 is a motor connected with the pushing screw 912.

Example two:

fig. 5 to 6 show an injection molding machine having an injection molding structure according to an embodiment of the present invention, in which only portions related to the embodiment of the present invention are shown for convenience of description, and detailed descriptions are as follows:

the injection molding machine comprises a lower template 12, an upper template 13 and a bracket 14, wherein the bracket 14 comprises a bottom plate 141 for fixing the lower template 12, a top plate 142 arranged above the bottom plate 141 and a connecting column 143 for connecting the bottom plate 141 and the top plate 142, the top plate 142 is provided with a fixing hole (not shown) for fixing an outer shaft cylinder 2, during assembly, the outer shaft cylinder 2 passes through the fixing hole and is fixed on the top plate 142, the lower template 12 and the upper template 13 are both arranged between the top plate 142 and the bottom plate 141, the lower end of an injection main shaft is connected with an injection molding port of the upper template 13, the outer shaft cylinder 2 and a feeding assembly 9 are both fixed on the bracket 14 and are particularly fixed on the top plate 142, and the bracket 14 is also provided with a lifting mechanism 15 for driving the injection main shaft to move up and down and a rotating mechanism 16 for driving an injection screw to rotate; specifically, the lifting mechanism 15 is disposed on the top plate 142, the lifting mechanism 15 is a double-head cylinder, the movable terminal 151 at the upper end of the lifting mechanism 15 is connected with the injection spindle through the connecting frame 17, the movable terminal 152 at the lower end of the lifting mechanism 15 is connected with the upper mold plate 13, specifically, the connecting frame 17 includes a flat plate 171 and a fixing frame 172 disposed on the lower surface of the flat plate 171 and used for fixing the injection spindle 1, the flat plate 171 is disposed above the top plate 142 in parallel, the rotating mechanism 16 is disposed on the lower surface of the connecting frame 17 and located in the fixing frame 172, further, the top plate 142 is vertically provided with the guide posts 18, the connecting frame 17 is slidably disposed on the guide posts 18 to ensure that the connecting frame 17 and the injection spindle 1 move up and down stably, the lifting mechanism 15 is disposed on the top plate 142, the movable terminal corresponding to the lower end of the lifting mechanism 15 is provided with a through hole, so that the movable terminal at the lower end of the lifting mechanism 15 is connected with the upper mold plate 13, during injection molding, the lifting mechanism 15 pushes the connecting frame 17 and the upper mold 13 to move up and down synchronously while driving the rotating mechanism 16 and the injection spindle 1 to move, and the feeding assembly 9 is fixed on the top plate 142, therefore, when the feeding barrel is not interfered with the injection spindle 2, the injection spindle, the injection barrel, and the injection barrel can be used for realizing normal injection production process, and the injection spindle injection barrel injection machine, thereby, which can be used for improving the injection production efficiency of the injection spindle 1.

Preferably, two lifting mechanisms 15 are arranged on two opposite sides of the injection main shaft respectively, so as to ensure that two ends of the upper template 13 are lifted synchronously, ensure stable mold opening and closing, and simultaneously ensure the coaxiality of the injection main shaft 1 and the injection screw 4.

Preferably, the bracket 14 is further provided with a guide assembly 19 for preventing the movable terminal at the lower end of the lifting mechanism 15 from being inclined, and specifically, the guide assembly 19 comprises a fixing plate 191 fixed on the connecting column 143, a first guide shaft sleeve 192 arranged on the fixing plate 191 and adapted to the movable terminal 152 at the lower end of the lifting mechanism 15, a second shaft sleeve 193 arranged on the fixing plate 191, and a guide shaft 194 adapted to the second shaft sleeve 193; during assembly, the fixing plate 191 is arranged above the upper die plate 13, the guide shaft 194 penetrates through the second shaft sleeve 193 to be connected with the upper die plate 13, the movable terminal 152 at the lower end of the lifting mechanism 15 penetrates through the first guide shaft sleeve 192 to be connected with the upper die plate 13, the lifting stability of the movable terminal 152 at the lower end of the lifting mechanism 15 can be effectively guaranteed through the fixing plate 191 and the first guide shaft sleeve 192, and meanwhile, the upper die plate 13 is accurately aligned with the lower die plate 12 during die opening and closing.

Example three:

fig. 7 illustrates an injection molding method of an injection molding machine having an injection molding structure according to an embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are illustrated, and the details are as follows:

the method comprises the following steps:

step S10: the injection main shaft 1 is butted in place with a glue injection port of a mold;

step S20: the injection main shaft 1 moves in place, so that the annular groove 5 is over against the feeding window 7;

step S30: the feeding assembly 9 acts and feeds the rubber material into the annular groove 5 through the feeding window 7 and the injection channel 3, and the injection screw 4 pushes the rubber material downwards;

step S40: the heating sleeve 8 heats the rubber material pushed by the injection screw 4 to a molten state;

step S50: the injection screw 4 injects the molten gum material into the mold.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. An injection molding structure is characterized by comprising an injection main shaft and an outer shaft barrel, wherein the outer shaft barrel is sleeved on the injection main shaft in a sliding manner; an injection channel penetrating through two ends of the injection main shaft is axially arranged in the injection main shaft;

the injection main shaft is provided with an injection channel, the injection channel is communicated with the injection main shaft through a feeding channel, the outer shaft barrel is provided with a feeding window communicated with the annular groove, and the axial length of the annular groove is greater than the stroke of the injection main shaft and the axial length of the feeding window;

the feeding device also comprises a heating sleeve and a feeding assembly arranged corresponding to the feeding window; the lower end of the injection main shaft extends out of the outer shaft barrel, and the heating sleeve is coaxially sleeved on the lower end of the injection main shaft.

2. An injection structure according to claim 1, wherein the feed channel is located on an inner wall of a lower end of the annular groove, and the feed channel is provided in plurality and distributed annularly.

3. An injection molding structure according to claim 2, wherein the inner diameter of the inlet of the feed passage is larger than the depth of the annular groove, and the inlets of two adjacent feed passages are directly communicated with each other.

4. An injection structure according to claim 1, wherein the feed window is inclined and has a lower end communicating with the annular groove.

5. The injection molding structure of claim 4, wherein the feeding assembly comprises a screw rod pushing pipe unit inserted into the feeding window, a driving unit for providing power for the screw rod pushing pipe unit, and a hopper for feeding the screw rod pushing pipe unit; the screw rod pushing pipe unit comprises a feeding pipe extending into the feeding window and a pushing screw rod arranged in the feeding pipe; and a discharge port of the hopper is communicated with the feeding pipe, and when the hopper is assembled in place, the lower end of the material pushing screw rod is inclined downwards.

6. An injection molding machine with the injection molding structure of any one of claims 1 to 5, which comprises a lower template, an upper template and a bracket, wherein the lower end of the injection main shaft is connected to an injection port of the upper template, and the outer shaft barrel and the feeding assembly are fixed on the bracket; and the bracket is also provided with a lifting mechanism for driving the injection main shaft to move up and down and a rotating mechanism for driving the injection screw to rotate.

7. The injection molding machine according to claim 6, wherein the lifting mechanism is a double-headed cylinder and the movable terminal at the upper end thereof is connected to the injection main shaft through a connecting frame and the movable terminal at the lower end thereof is connected to the upper mold plate, and the rotating mechanism is provided on the connecting frame.

8. An injection molding machine as claimed in claim 7, wherein said lifting mechanism is provided in two and respectively disposed on opposite sides of said injection main shaft.

9. An injection molding machine according to claim 8, wherein said carriage is further provided with a guide assembly for preventing a movable terminal of a lower end of said lifting mechanism from being skewed.

10. An injection molding machine injection molding method having an injection molding structure according to any one of claims 1 to 5, comprising the steps of:

the injection main shaft is butted in place with a glue injection port of the mold;

the injection main shaft moves in place, so that the annular groove is over against the feeding window;

the feeding assembly acts and feeds the rubber material into the annular groove through the feeding window and enters the injection channel, and the injection screw pushes the rubber material downwards;

the heating sleeve heats the rubber material pushed by the injection screw to a molten state;

the injection screw injects molten rubber into the mold.

Images