Injection molding structure, injection molding machine having the same, and injection molding method of the injection molding machine

Abstract

The application relates to an injection molding structure, an injection molding machine with the structure and an injection molding method of the injection molding machine, which comprises an injection spindle and an outer shaft cylinder slidingly sleeved on the injection spindle; an injection channel penetrating through two ends of the injection spindle is arranged axially in the injection spindle; an injection screw rod for pushing rubber material downward into the injection channel is further arranged; an annular groove is arranged on the outer wall of the injection spindle; the annular groove is communicated with the injection channel through a material running channel; a feeding window is arranged on the outer shaft cylinder and communicated with the annular groove; the axial length of the annular groove is greater than the stroke of the injection spindle and the axial length of the feeding window; a heating sleeve is further arranged; and a feeding assembly corresponding to the feeding window is arranged; the lower end of the injection spindle extends out of the outer shaft cylinder; and the heating sleeve is coaxially sleeved on the lower end of the injection spindle; the injection spindle and the outer shaft cylinder can realize independent operation of glue injection and feeding, the feeding hopper mechanism can avoid moving together with the injection spindle, and feeding at any time during the production process is greatly facilitated.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine technology, and in particular to an injection molding structure, an injection molding machine having the structure, and an injection molding method using the injection molding machine. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. Injection molding provides the ability to mass-produce complex parts in a precise manner. Furthermore, more and more injection molding machines are being used for processing micro-parts, especially vertical injection molding machines. Generally, a vertical injection molding machine includes a horizontally or vertically mounted injection unit and a vertically guided clamping system. Under pressure sufficient to resist the force generated by the molten material, the clamping system supports a mold consisting of an upper mold and a lower mold. When the relative vertical movement between the upper and lower molds is combined, an injection cavity is defined, and the molten plastic material is injected into the mold. After the part cools and solidifies, the mold is opened, and the part can be removed.

[0003] Current injection molding machines require the upper mold to rise and fall to open and close with the lower mold. This necessitates that the injection feeding pipe also move up and down with the upper mold to ensure a continuous injection of the material into the cavity between the upper and lower molds. However, the injection feeding pipe is fixed to the feeding hopper mechanism. Therefore, this feeding method is particularly inconvenient for replenishing material in actual production because the feeding hopper mechanism is movable. To solve the above problems and facilitate replenishment at any time, our company has proposed a brand-new vertical injection molding machine solution. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing an injection molding structure, an injection molding machine having the same structure, and an injection molding method for the same machine. This injection molding structure, the injection molding machine having the same structure, and the injection molding method for the same machine can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by the present invention to solve its technical problem is as follows:

[0006] An injection molding structure is provided, characterized in that the structure includes an injection spindle and an outer cylinder slidably sleeved on the injection spindle; the injection spindle is provided with an injection channel axially extending through both ends thereof.

[0007] It also includes an injection screw that extends into the injection channel to push the rubber material downwards. The outer wall of the injection spindle is provided with an annular groove. The annular groove is connected to the injection channel through a material feeding channel. The outer shaft cylinder is provided with a feed window that is connected to the annular groove. The axial length of the annular groove is greater than the stroke of the injection spindle and the axial length of the feed window.

[0008] It also includes a heating jacket and a feeding assembly corresponding to the feed window; the lower end of the injection spindle extends out of the outer shaft cylinder, and the heating jacket is coaxially sleeved on the lower end of the injection spindle.

[0009] In the injection molding structure of the present invention, the material feeding channel is located on the inner wall of the lower end of the annular groove, and the material feeding channel is provided in multiple ways and distributed in a ring.

[0010] In the injection molding structure of the present invention, the inner diameter of the inlet of the material feeding channel is greater than the depth of the annular groove, and the inlets of two adjacent material feeding channels are directly connected to each other.

[0011] In the injection molding structure of the present invention, the feed window is inclined and its lower end is connected to the annular groove.

[0012] The injection molding structure of the present invention includes a feeding assembly comprising a screw pusher tube unit inserted into the feed window, a drive unit providing power to the screw pusher tube unit, and a hopper for feeding the screw pusher tube unit; the screw pusher tube unit includes a feeding pipe extending into the feed window and a pusher screw disposed within the feeding pipe; the outlet of the hopper is connected to the feeding pipe, and when assembled in place, the lower end of the pusher screw is inclined downwards.

[0013] An injection molding machine having the above-mentioned injection structure is also provided. The injection molding machine includes a lower mold plate, an upper mold plate, and a support. The lower end of the injection spindle is connected to the injection port of the upper mold plate. The outer shaft cylinder and the feeding assembly are both fixed on the support. The support is also provided with a lifting mechanism for driving the injection spindle to move up and down, and a rotating mechanism for driving the injection screw to rotate.

[0014] The injection molding machine with the above-mentioned injection molding structure according to the present invention, wherein the lifting mechanism is a double-headed cylinder and its upper movable terminal is connected to the injection spindle through a connecting frame, and its lower movable terminal is connected to the upper template, and the rotating mechanism is disposed on the connecting frame.

[0015] The injection molding machine with the above-described injection molding structure of the present invention includes two lifting mechanisms, which are respectively arranged on two opposite sides of the injection spindle.

[0016] The injection molding machine with the above-described injection molding structure of the present invention further includes a guide assembly on the support to prevent the movable terminal at the lower end of the lifting mechanism from tilting.

[0017] A method for injection molding of an injection molding machine having the above-described injection molding structure is also provided, the method comprising the following steps:

[0018] The injection spindle is properly aligned with the injection port of the mold;

[0019] The injection spindle moves into position so that the annular groove is directly opposite the feed window;

[0020] The feeding component operates and feeds the adhesive into the annular groove and into the injection channel through the feeding window, while the injection screw pushes the adhesive downwards.

[0021] The heating jacket heats the rubber compound pushed by the injection screw to a molten state;

[0022] The injection screw injects the molten rubber into the mold.

[0023] The beneficial effects of the present invention are as follows: by setting the injection spindle and the outer cylinder to move relative to each other, the injection of the injection spindle and the continuous feeding of the feeding component can be carried out independently without interference. The feeding component can be fixed, which greatly facilitates the operation of feeding at any time during the production process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0025] Figure 1 This is a cross-sectional view of the injection molding structure according to Embodiment 1 of the present invention.

[0026] Figure 2 This is a real-time state diagram of the injection spindle descending in the injection molding structure of Embodiment 1 of the present invention.

[0027] Figure 3 yes Figure 2 AA sectional view.

[0028] Figure 4 yes Figure 3 BB cross-sectional view.

[0029] Figure 5 This is a front view of the overall structure of the injection molding machine as described in Embodiment 2 of the present invention.

[0030] Figure 6This is a side view of the overall structure of the injection molding machine as described in Embodiment 2 of the present invention.

[0031] Figure 7 This is a flowchart of the injection molding method of the injection molding machine described in Embodiment 3 of the present invention. Detailed Implementation

[0032] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0035] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0037] Example 1:

[0038] Figure 1-4 The injection molding structure provided in Embodiment 1 of the present invention is shown. For ease of explanation, only the parts related to the embodiments of the present invention are shown, and are described in detail below:

[0039] The injection molding structure includes a cylindrical injection spindle 1 and an outer shaft cylinder 2 that is slidably sleeved on the injection spindle 1. When assembled, the outer shaft cylinder 2 and the injection spindle 1 are tightly slidably fitted together. The injection spindle 1 has an axially extending injection channel 3 that passes through both ends of it to deliver the rubber material into the mold.

[0040] The injection molding structure also includes an injection screw 4 that extends into the injection channel 3 to push the rubber material downwards. Specifically, the lower end of the injection screw 4 is provided with a spiral blade, and the upper end extends out of the injection channel 3 with the two slidingly engaged. Furthermore, the upper end of the injection screw 4 is also provided with a sealing ring to seal and isolate the injection channel 3 from the outside. Furthermore, the outer wall of the injection spindle 1 is provided with an annular groove 5, which is connected to the injection channel 3 through a material passage 6. The outer shaft cylinder 2 is provided with a feed window 7 that is connected to the annular groove 5. During feeding, the rubber material enters the annular groove 5 through the feed window 7 and enters the injection channel 3 through the material passage 6. Then, the injection screw 4 pushes the rubber material downwards to achieve continuous feeding. The axial length of the annular groove 5 is greater than the stroke of the injection spindle 1 and the axial length of the feed window 7 along the injection spindle 1, so that when the injection spindle 1 moves up and down to inject rubber into the mold, the rubber material can be continuously fed into the annular groove 5 for replenishment, avoiding complete misalignment between the annular groove 5 and the feed window 7, which would lead to material breakage.

[0041] The injection molding structure also includes a heating sleeve 8 and a feeding assembly 9 corresponding to the feed window 7; the lower end of the injection spindle 1 extends out of the outer shaft cylinder 2, and the heating sleeve 8 is coaxially sleeved on the lower end of the injection spindle 1 to heat and melt the rubber material entering the injection channel 3. Furthermore, an injection nozzle 10 is provided on the lower end of the injection spindle 1 below the heating sleeve 8 for docking with the injection port of the mold.

[0042] Preferably, the material feeding channel 6 is located on the inner wall of the lower end of the annular groove 5. Multiple material feeding channels 6 are provided and distributed in a ring to ensure the feeding speed and to avoid material blockage in a single material feeding channel 6.

[0043] 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 inner wall length of the annular groove 5 along the radial direction of the injection spindle 1. Specifically, the inlet of the material feeding channel 6 is set towards the axial direction of the injection spindle 1, so that a space is left with the outer wall of the injection spindle 1. The inlets of two adjacent material feeding channels 6 are directly connected to each other. Specifically, an inverted V-shaped protrusion 11 is provided at the middle position of the two adjacent inlets. The protrusion 11 is provided with guide slopes 111 on both sides of the inlet, so as to facilitate the smooth entry of the rubber material into the material feeding channel 6 and reduce the risk of material blockage.

[0044] Preferably, the feed window 7 is inclined and its lower end is connected to the annular groove 5 so that the material can fall into the annular groove 5.

[0045] Preferably, the feeding assembly 9 includes a screw pusher tube unit 91 inserted into the feeding window 7, a drive unit 92 that provides power to the screw pusher tube unit 91, and a hopper 93 that feeds the screw pusher tube unit 91. The screw pusher tube unit 91 includes a feeding pipe 911 extending into the feeding window 7 and a pusher screw 912 extending into the feeding pipe 911, which drives the pusher screw 912 to rotate and continuously push the rubber material into the annular groove 5. The outlet 931 of the hopper 93 is connected to the feeding pipe 911. When assembled in place, the lower end of the pusher screw 912 is tilted downwards. The drive unit 92 is a motor connected to the pusher screw 912.

[0046] Example 2:

[0047] Figure 5-6 An injection molding machine with the injection molding structure of Embodiment 1 provided by an embodiment of the present invention is shown. For ease of explanation, only the parts related to the embodiment of the present invention are shown, and are described in detail below:

[0048] The injection molding machine includes a lower mold plate 12, an upper mold plate 13, and a support 14. The support 14 includes a base plate 141 for fixing the lower mold plate 12, a top plate 142 located above the base plate 141, and a connecting column 143 connecting the base plate 141 and the top plate 142. The top plate 142 has a fixing hole (not shown) for fixing the outer shaft cylinder 2. During assembly, the outer shaft cylinder 2 passes through the fixing hole and is fixed to the top plate 142. The lower mold plate 12 and the upper mold plate 13 are both located between the top plate 142 and the base plate 141. The lower end of the injection spindle is connected to the injection port of the upper mold plate 13. The outer shaft cylinder 2 and the feeding assembly 9 are both fixed on the bracket 14, specifically on the top plate 142. The bracket 14 is also equipped with a lifting mechanism 15 for driving the injection spindle to move up and down, and a rotating mechanism 16 for driving the injection screw to rotate. Specifically, the lifting mechanism 15 is set on the top plate 142, and the lifting mechanism 15 is a double-headed cylinder. The upper movable terminal 151 of the lifting mechanism 15 is connected to the injection spindle through the connecting frame 17, and the lower movable terminal 152 is connected to the upper template 13. Specifically, the connecting frame 17 includes a flat plate 171 and a plate set on the flat plate 172. A mounting bracket 172 is used to fix the injection spindle 1 on the lower surface of plate 171. Plate 171 is arranged parallel above top plate 142. Rotation mechanism 16 is located on the lower surface of connecting bracket 17 and inside mounting bracket 172. Furthermore, guide post 18 is vertically provided on top plate 142, and connecting bracket 17 is slidably mounted on guide post 18 to ensure smooth vertical movement of connecting bracket 17 and injection spindle 1. Lifting mechanism 15 is provided on top plate 142, and through hole is provided on top plate 142 corresponding to the movable terminal at the lower end of lifting mechanism 15 to facilitate lifting. The lower movable terminal of the mechanism 15 is connected to the upper template 13. During the injection molding process, the lifting mechanism 15 pushes the connecting frame 17 and the upper template 13 to move up and down synchronously, and also drives the rotating mechanism 16 and the injection spindle 1 to move together. The feeding assembly 9 is fixed on the top plate 142. Therefore, whether the mold is open or closed, the injection spindle 1 and the outer cylinder 2 do not interfere with each other. The injection spindle 1 is normally responsible for injecting the rubber material, and the outer cylinder 2 is normally responsible for supplying material to the injection channel 3. This allows the machine to replenish material without stopping during production, which greatly improves the efficiency of the injection molding machine.

[0049] Preferably, there are two lifting mechanisms 15, which are respectively located on two opposite sides of the injection spindle to ensure that the two ends of the upper template 13 rise and fall synchronously, ensuring smooth mold opening and closing. At the same time, it also ensures the coaxiality of the injection spindle 1 and the injection screw 4.

[0050] Preferably, the bracket 14 is also provided with a guide assembly 19 to prevent the movable terminal at the lower end of the lifting mechanism 15 from tilting. Specifically, the guide assembly 19 includes a fixing plate 191 fixed on the connecting column 143, a first guide bushing 192 provided on the fixing plate 191 and adapted to the movable terminal 152 at the lower end of the lifting mechanism 15, a second bushing 193 provided on the fixing plate 191, and a guide shaft 194 adapted to the second bushing 193. During assembly, the fixing plate 191 is positioned above the upper template 13, the guide shaft 194 passes through the second bushing 193 and connects to the upper template 13, and the movable terminal 152 at the lower end of the lifting mechanism 15 passes through the first guide bushing 192 and connects to the upper template 13. By setting the fixing plate 191 and the first guide bushing 192, the stability of the lifting of the movable terminal 152 at the lower end of the lifting mechanism 15 can be effectively ensured, while ensuring that the upper template 13 is precisely aligned with the lower template 12 when the mold is opened and closed.

[0051] Example 3:

[0052] Figure 7 An injection molding method for an injection molding machine with the injection molding structure of Embodiment 1 provided by an embodiment of the present invention is illustrated. For ease of explanation, only the parts related to the embodiments of the present invention are shown, and are described in detail below:

[0053] The above method includes the following steps:

[0054] Step S10: The injection spindle 1 is properly aligned with the injection port of the mold;

[0055] Step S20: The injection spindle 1 moves into position so that the annular groove 5 is directly opposite the feed window 7;

[0056] Step S30: The feeding component 9 operates and feeds the adhesive into the annular groove 5 and into the injection channel 3 through the feeding window 7. The injection screw 4 pushes the adhesive downward.

[0057] Step S40: The heating sleeve 8 heats the rubber compound pushed by the injection screw 4 to a molten state;

[0058] Step S50: The injection screw 4 injects the molten rubber into the mold.

[0059] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An injection-molded structure, characterized in that, The structure includes an injection spindle and an outer shaft sleeve that is slidably sleeved on the injection spindle; the injection spindle has an axially extending injection channel through both ends. It also includes an injection screw that extends into the injection channel to push the rubber material downwards. The outer wall of the injection spindle is provided with an annular groove. The annular groove is connected to the injection channel through a material feeding channel. The outer shaft cylinder is provided with a feed window that is connected to the annular groove. The axial length of the annular groove is greater than the stroke of the injection spindle and the axial length of the feed window. It also includes a heating jacket and a feeding assembly corresponding to the feed window; the lower end of the injection spindle extends out of the outer shaft cylinder, and the heating jacket is coaxially sleeved on the lower end of the injection spindle; The material feeding channel is located on the inner wall of the lower end of the annular groove. Multiple material feeding channels are provided and arranged in a ring. The inner diameter of the inlet of the material feeding channel is greater than the depth of the annular groove. The inlets of two adjacent material feeding channels are directly connected to each other. The feeding window is inclined and its lower end is connected to the annular groove.

2. The injection-molded structure according to claim 1, characterized in that, The feeding assembly includes a screw pusher tube unit inserted into the feed window, a drive unit that provides power to the screw pusher tube unit, and a hopper that supplies material to the screw pusher tube unit; the screw pusher tube unit includes a feeding pipe extending into the feed window and a pusher screw disposed in the feeding pipe; the outlet of the hopper is connected to the feeding pipe, and when assembled in place, the lower end of the pusher screw is inclined downwards.

3. An injection molding machine having the injection molding structure of claim 1, characterized in that, The injection molding machine includes a lower mold plate, an upper mold plate, and a support. The lower end of the injection spindle is connected to the injection port of the upper mold plate. The outer shaft cylinder and the feeding assembly are both fixed on the support. The support is also provided with a lifting mechanism for driving the injection spindle to move up and down, and a rotating mechanism for driving the injection screw to rotate.

4. The injection molding machine according to claim 3, characterized in that, The lifting mechanism is a double-headed cylinder, and its upper movable terminal is connected to the injection spindle through a connecting frame, and its lower movable terminal is connected to the upper template. The rotating mechanism is located on the connecting frame.

5. The injection molding machine according to claim 4, characterized in that, The lifting mechanism has two parts, which are respectively located on two opposite sides of the injection spindle.

6. The injection molding machine according to claim 5, characterized in that, The bracket is also equipped with a guide component to prevent the movable terminal at the lower end of the lifting mechanism from tilting.

7. An injection molding method for an injection molding machine having the injection molding structure according to any one of claims 1-2, characterized in that, The method includes the following steps: The injection spindle is properly aligned with the injection port of the mold; The injection spindle moves into position so that the annular groove is directly opposite the feed window; The feeding component operates and feeds the adhesive into the annular groove and into the injection channel through the feeding window, while the injection screw pushes the adhesive downwards. The heating jacket heats the rubber compound pushed by the injection screw to a molten state; The injection screw injects the molten rubber into the mold.

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