Drawing needle injection mold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a drawing needle injection mold which comprises a movable mold and a fixed mold, the movable mold and the fixed mold are matched to form a forming cavity, a pouring opening is formed in the upper end of the movable mold and communicated with the forming cavity, and a hollow supporting frame is arranged at the lower end of the fixed mold and provided with a jacking oil cylinder. The driving end of the jacking oil cylinder is connected with the limiting plate so as to drive the limiting plate to move up and down in the supporting frame. A supporting mold is further arranged at the lower end of the supporting frame, a movable slide needle extending upwards is arranged on the supporting mold, and one end of the slide needle penetrates through the supporting frame upwards, is fixedly connected to the limiting plate, penetrates through the fixed mold and moves up and down along with the limiting plate so as to penetrate into the forming cavity. During mold closing, the movable mold is pressed downwards to form a closed forming cavity with the fixed mold, the ejection oil cylinder drives the slide needle to penetrate into the forming cavity, the core inserting function is achieved, and then molten plastic is injected through the injection molding opening to start forming. When the mold is opened, the top stretching oil cylinder firstly drives the slide needle to be pulled out of the forming cavity, the movable mold moves upwards to be separated from the fixed mold, the core inserting function is achieved, and a formed plastic part in the forming cavity is taken out.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection mold technical field especially relates to a needle extraction injection mold. BACKGROUND

[0002] Traditional injection mold usually includes two parts of movable mold and fixed mold, which form a forming cavity for injection molding through cooperation. In the injection process, the molten plastic is injected into the forming cavity through the pouring port, and the plastic product with the required shape is formed after cooling. However, for some plastic products with complex internal structure or local core-pulling demolding, especially in the injection molding parts that need internal core-pulling, how to realize the accurate control and stable movement of the line position needle (i.e. core-pulling mechanism) while ensuring the compact structure of the mold becomes the key to improve the efficiency and quality of the mold. The traditional solution often involves complex mechanical structure and control system, which not only increases the cost and manufacturing difficulty of the mold, but also may affect the stability and efficiency of the injection process. SUMMARY

[0003] The utility model aims at providing a needle extraction injection mold, which solves the technical problem of unstable movement of the needle in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model embodiment provides a needle extraction injection mold, which comprises a movable mold and a fixed mold. The movable mold and the fixed mold cooperate to form a forming cavity. The upper end of the movable mold is provided with a pouring port, which is in communication with the forming cavity. The lower end of the fixed mold is provided with a hollow support frame. The support frame is provided with a top extension oil cylinder. The driving end of the top extension oil cylinder is connected to a limiting plate to drive the limiting plate to move up and down in the support frame. The lower end of the support frame is also provided with a lifting mold. The lifting mold is provided with a line position needle which extends upward and is movable. One end of the line position needle penetrates the support frame upward, is fixedly connected to the limiting plate, penetrates the fixed mold, and moves up and down with the limiting plate to penetrate into the forming cavity.

[0005] Further, the line position needle is provided with a plurality of line position needles. The fixed mold is provided with a guide plate fixed at the upper end thereof. The guide plate is provided with a guide port corresponding to and matched with the line position needle.

[0006] Further, the lifting mold is provided with a line position guide column which extends upward and is movable. One end of the line position guide column penetrates the support frame upward, is fixedly connected to the limiting plate, penetrates the fixed mold, and moves up and down with the limiting plate. The line position guide column is shorter than the line position needle, so that the line position guide column abuts to the outer end of the forming cavity, and the line position needle extends into the forming cavity.

[0007] Further, the top extension oil cylinder is provided with two groups and is connected to the two ends of the lifting mold respectively. The driving end of the top extension oil cylinder is connected to a ladder groove piece. The ladder groove piece is detachably installed at the upper end of the limiting plate.

[0008] Further, the lower end of the limiting plate is also provided with a reinforcing plate fixedly connected thereto, and the lower end of the reinforcing plate is also provided with a buffer for reducing impact.

[0009] Further, the fixed mold is provided with a plurality of longitudinal and transverse cooling pipes.

[0010] Further, the lower end of the lifting mold is provided with a load-bearing base, and the corner end between the load-bearing base and the lifting mold is provided with a load-bearing pillar.

[0011] Further, the load-bearing base is also provided with an upwardly extending guide pillar, and the guide pillar penetrates into the movable mold, and the movable mold moves up and down along the guide pillar.

[0012] The above one or more technical solutions in the needle extraction injection mold provided by the embodiments of the utility model have at least one of the following technical effects:

[0013] The mold is composed of a movable mold and a fixed mold, and the movable mold and the fixed mold are tightly matched to form a closed forming cavity. The movable mold is provided with a pouring opening at the top, which is used for injecting molten plastic into the forming cavity. A top extension oil cylinder is installed in the support frame, and the driving end of the top extension oil cylinder is connected with a limiting plate. Through the extension and retraction movement of the top extension oil cylinder, the limiting plate can be driven to move up and down in the support frame. A plurality of upwardly extending row position needles are fixedly connected to the limiting plate. When the mold is closed, the movable mold is pressed downward to form a closed forming cavity with the fixed mold, the top extension oil cylinder drives the row position needles to penetrate into the forming cavity, the core insertion function is realized, and then the injection of molten plastic is started. When the mold is opened, the top extension oil cylinder first drives the row position needles to move away from the forming cavity, and then the movable mold moves upward and separates from the fixed mold, so that the core insertion function is realized, and the molded plastic part in the forming cavity is taken out. Through the integrated design of the support frame and the top extension oil cylinder, the structure of the mold is simplified, the stability of the needle extraction action is improved, and the manufacturing and maintenance costs are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Fig. 1 The overall structure schematic diagram of the needle extraction injection mold provided by the embodiments of the utility model is shown in the figure.

[0016] Fig. 2 The internal view of the needle extraction injection mold provided by the embodiments of the utility model is shown in the figure, which ignores the movable mold, the fixed mold, the lifting mold and the limiting plate.

[0017] In the figure, various reference signs are as follows:

[0018] 100, moving die; 110, fixed die; 120, forming cavity; 130, pouring gate; 140, support frame; 150, top extension oil cylinder; 160, limiting plate; 170, lifting die; 180, row of pins; 190, guide plate;

[0019] 200, row of guide columns; 210, ladder groove; 220, reinforcing plate; 230, buffer; 240, cooling pipe; 250, bearing base; 260, bearing column; 270, guide column. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described below in detail, examples of which are shown in the 1-2 drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The following will be described by referring to the drawings. Figs. 1-2 The described embodiments are exemplary, and are intended to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.

[0021] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0022] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0024] In an embodiment of the utility model, provide a kind of needle extraction injection mold, including movable mould 100 and fixed mould 110, movable mould 100 and fixed mould 110 are matched to become forming cavity 120 between, the upper end of movable mould 100 is provided with pouring opening 130, pouring opening 130 is communicated with forming cavity 120, the lower end of fixed mould 110 is equipped with hollow support frame 140, support frame 140 is equipped with top extension oil cylinder 150, the driving end of top extension oil cylinder 150 is connected with limit plate 160, to drive limit plate 160 in support frame 140 up and down movement.Lower end of support frame 140 is also equipped with lifting mould 170, lifting mould 170 is equipped with the movable line needle 180 extending upwards, one end of line needle 180 penetrates support frame 140 upwards, is fixedly connected to limit plate 160, and penetrates fixed mould 110, with limit plate 160 moves up and down, to be inserted into forming cavity 120.

[0025] Specifically, the mold is composed of a movable mold 100 and a fixed mold 110. The movable mold 100 and the fixed mold 110 are tightly fitted to form a closed forming cavity 120. The movable mold 100 is provided with a pouring opening 130 at the top for injecting molten plastic into the forming cavity 120. A top extension oil cylinder 150 is installed in the support frame 140, and its driving end is connected to a limit plate 160. The limit plate 160 moves up and down within the support frame 140, ensuring sufficient space for subsequent core pulling actions. Through the extension and retraction movement of the top extension oil cylinder 150, the limit plate 160 can be driven to move up and down within the support frame 140. The limit plate 160 is fixedly connected to multiple line needles 180 extending upwards. When the mold is closed, the movable mold 100 is pressed down to form a closed forming cavity 120 with the fixed mold 110. The top extension oil cylinder 150 drives the line needles 180 to penetrate into the forming cavity 120, achieving the core insertion function. Subsequently, molten plastic is injected through the injection port to start the molding process. When the mold is opened, the top extension oil cylinder 150 first drives the line needles 180 to move away from the forming cavity 120. The movable mold 100 moves up and separates from the fixed mold 110, achieving the core insertion function and allowing the molded plastic part in the forming cavity 120 to be removed. Through the integrated design of the support frame 140 and the top extension oil cylinder 150, the mold structure is simplified, the stability of the needle extraction action is improved, and the manufacturing and maintenance costs are reduced. The lower end of the support frame 140 is provided with a lifting mould 170, which not only provides additional support for the line needles 180 but also ensures the stability of the mold during the closing process. The design of the lifting mould 170 allows the line needles 180 to move up and down when necessary without affecting other parts of the mold.

[0026] Further, the row of pins 180 is provided, and the fixed mold 110 is provided with a guide plate 190 fixed at the upper end of the fixed mold 110, and the guide plate 190 is provided with a guide hole corresponding to the row of pins 180. The design of the plurality of row of pins 180 makes the core pulling mechanism more stable when supporting and moving the injection molded part, and reduces the risk of deformation or damage caused by uneven stress at a single point. At the same time, the design of the guide plate 190 and the guide hole further enhances the stability of the movement of the row of pins 180, and ensures the smooth progress of the core pulling process.

[0027] Further, the lifting mold 170 is provided with a movable row of guide columns 200 extending upward, one end of the row of guide columns 200 penetrates the support frame 140 upward, is fixedly connected to the limiting plate 160, and penetrates the fixed mold 110, and moves up and down with the limiting plate 160. The row of guide columns 200 is shorter than the row of pins 180, so that the row of guide columns 200 abuts to the outer end of the forming cavity 120, and the row of pins 180 extends into the forming cavity 120. Specifically, the design of the row of guide columns 200 provides additional guidance and support for the movement of the limiting plate 160 and the row of pins 180. They ensure the stability and accuracy of the limiting plate 160 during the up and down movement, thereby ensuring that the row of pins 180 can accurately extend into and pull out of the forming cavity 120. Since the row of guide columns 200 is shorter than the row of pins 180, and the caliber of the row of guide columns 200 is larger than that of the row of pins 180, the row of guide columns 200 abuts to the forming cavity 120, and the row of pins 180 can extend into the forming cavity 120 (with a communication hole), so that the row of guide columns 200 does not affect the core pulling function under the premise of protecting the movement of the row of pins 180 from being disturbed.

[0028] Further, the top extension oil cylinder 150 is provided with two groups and is connected at both ends of the lifting mold 170, and the driving end of the top extension oil cylinder 150 is connected with a ladder groove piece 210 which is detachably installed at the upper end of the limiting plate 160. The design of the two groups of top extension oil cylinders 150 provides a powerful driving force for the up and down movement of the lifting mold 170. This design ensures that the mold can quickly and stably complete the action during the core pulling and resetting process, and the ladder groove piece 210 is detachably installed, which makes it easy to detach it from the limiting plate 160 when needed. This design facilitates the maintenance and replacement of the ladder groove piece 210, reduces maintenance cost and time. The lower end of the limiting plate 160 is also provided with a reinforcing plate 220 fixedly connected thereto, and the lower end of the reinforcing plate 220 is also provided with a buffer 230 for reducing impact. The design of the reinforcing plate 220 significantly enhances the overall strength and stability of the limiting plate 160.

[0029] Further, the fixed mold 110 is provided with a plurality of longitudinal and transverse cooling pipes 240 for uniform cooling of the forming cavity 120.

[0030] Further, the lower end of the holding mold 170 is provided with a load-bearing base 250, and the corner end between the load-bearing base 250 and the holding mold 170 is provided with a load-bearing column 260. The design of the load-bearing base 250 and the load-bearing column 260 enhances the supporting capacity of the mold. This enables the mold to withstand greater loads, including the pressure in the injection molding process, the driving force of the top extension oil cylinder 150, and the weight of the mold itself. The load-bearing base 250 is also provided with an upwardly extending guide column 270 that penetrates the movable mold 100, and the movable mold 100 moves up and down along the guide column 270. The guide column 270 not only serves as a support, but more importantly provides precise guidance for the up and down movement of the movable mold 100.

[0031] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pin stripping injection mold characterized by, The utility model provides a moulding machine, including movable mould (100) and fixed mould (110), the movable mould (100) with fixed mould (110) between cooperation becomes forming cavity (120), the upper end of movable mould (100) is provided with pouring opening (130), pouring opening (130) with forming cavity (120) intercommunication, the lower end of fixed mould (110) is equipped with hollow support frame (140), support frame (140) is equipped with top stretch oil cylinder (150), and the drive end of top stretch oil cylinder (150) is connected with limit board (160), to drive limit board (160) in support frame (140) up and down activity, the lower end of support frame (140) is also equipped with the lifting mould (170), and the lifting mould (170) is equipped with the movable row needle (180) that extends upwards, and one end of row needle (180) penetrates upwards support frame (140), fixedly connected with limit board (160) and penetrates fixed mould (110), moves with limit board (160) up and down, to penetrate into forming cavity (120) inside.

2. The pin stripping injection mold of claim 1, wherein, Row needle (180) is equipped with several, and fixed mould (110) is equipped with guide plate (190) fixed on its upper end, and guide plate (190) is equipped with the guide opening corresponding with the matching of row needle (180).

3. The pin stripping injection mold of claim 2, wherein, The lifting mould (170) is equipped with the movable row guide column (200) that extends upwards, one end of row guide column (200) penetrates upwards support frame (140), fixedly connected with limit board (160) and penetrates fixed mould (110), moves with limit board (160) up and down, and row guide column (200) is shorter than row needle (180), so that row guide column (200) is abutted to the outer end of forming cavity (120), and row needle (180) extends into forming cavity (120).

4. The pin stripping injection mold of claim 1, wherein, The top stretch oil cylinder (150) is equipped with two groups and is connected at both ends of the lifting mould (170) respectively, and the drive end of top stretch oil cylinder (150) is connected with a ladder groove piece (210), which is detachably installed on the upper end of the limit board (160).

5. The pin stripping injection mold of claim 1, wherein, The lower end of the limit board (160) is also provided with a reinforcing plate (220) fixedly connected thereto, and the lower end of the reinforcing plate (220) is also provided with a shock-absorbing buffer (230).

6. The pin stripping injection mold of claim 1, wherein, The fixed mould (110) is provided with a plurality of longitudinal and transverse cooling pipes (240).

7. The pin stripping injection mold of claim 1, wherein, The lower end of the lifting mould (170) is provided with a load-bearing base (250), and the corner end between the load-bearing base (250) and the lifting mould (170) is provided with a load-bearing column (260).

8. The pin stripping injection mold of claim 7, wherein, The load-bearing base (250) is also provided with an upwardly extending guide column (270), which penetrates the movable mould (100), and the movable mould (100) moves up and down along the guide column (270).

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