Injection molding device with embedded bent metal needle

Abstract

The embodiment of the utility model discloses an injection molding device embedded with a bent metal needle, the injection molding device comprises a core-pulling sliding block assembly, a lower mold assembly and an upper mold assembly, the technical scheme is applied to the injection molding process that the metal needle with a break angle is embedded into a plastic part, and in the embodiment, the break angle of the metal needle is 82.5. In the actual application process, one end of the metal needle is fixed in the core-pulling sliding block assembly, then the other end of the metal needle is fixed to the lower mold assembly, and it can be understood that in the state, the relative positions of the core-pulling sliding block assembly and the lower mold assembly are fixed, then the upper mold assembly is buckled, and through the first injection molding half opening and the second injection molding half opening, the core-pulling sliding block assembly and the lower mold assembly are fixed; and an injection molding machine is connected through a sprue bush for injection molding, after injection molding is completed, the upper mold assembly is pulled away firstly, and then the core-pulling sliding block assembly and the lower mold assembly are pulled away, so that injection molding and demolding of the metal needle embedded part are completed. According to the technical scheme, precise positioning of the metal needle in injection molding of the injection molding part is achieved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of plastic processing, in particular to an injection molding device embedded with a curved metal needle. BACKGROUND

[0002] Injection molding is a common plastic processing method, which forms a product by injecting molten thermoplastic material into a mold cavity and then cooling and solidifying. Insert injection molding is a molding technology that combines resin and metal, which makes the molten material and the insert joint and solidifies to make an integrated product by injecting resin after placing a pre-prepared metal insert in the mold. This molding method can fully utilize the mutual combination of the easy formability, flexibility of resin and the rigidity, strength and heat resistance of metal to make complex and delicate metal-plastic integrated products.

[0003] The metal insert needs to be positioned when placed in the mold to ensure that its position does not shift during the injection molding process. The existing positioning methods mainly include slide block positioning, needle pressing positioning, guide groove positioning, and movable and fixed mold insert positioning. For some special products, these methods may not meet the requirements. CONTENT OF THE UTILITY MODEL

[0004] The present utility model aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the first aspect of the present utility model provides an injection molding device embedded with a curved metal needle, comprising: a core-pulling slide block assembly, the core-pulling slide block assembly comprises a first fixed assembly, the first fixed assembly comprises a first fixed part, a first fixed insert and a tail plate, the first fixed insert is fitted in the first fixed part, and one end of the curved metal needle can be fixed between the first fixed part and the first fixed insert;

[0006] The core-pulling slide block assembly further comprises a second fixed part and a second fixed insert, the second fixed insert is embedded in the second fixed part, and the other end of the curved metal needle can be fixed between the second fixed part and the second fixed insert;

[0007] The core-pulling slide block assembly further comprises a first guide port;

[0008] A lower mold assembly, the second fixed part and the second fixed insert are installed in the lower mold assembly;

[0009] The lower mold assembly comprises a second guide port;

[0010] The lower mold assembly comprises a first injection molding half;

[0011] An upper mold assembly comprising a guide post for passing through the first guide opening and the second guide opening, and further comprising a second injection molding half;

[0012] When the guide post passes through the first guide opening and the second guide opening and the lower mold assembly, the core-pulling slider assembly and the upper mold assembly are fastened, the first injection molding half and the second injection molding half are spliced together.

[0013] The first fixing assembly is detachably connected to the remaining components of the lower mold assembly and the core-pulling slider assembly.

[0014] In an embodiment, the upper mold assembly comprises:

[0015] An upper mold plate having a mounting cavity;

[0016] An upper mold mounting core disposed in the mounting cavity of the upper mold plate and having a plurality of positioning grooves on one side of the guide rod;

[0017] An upper mold backing plate disposed in the mounting cavity of the upper mold plate and on the side without the guide rod.

[0018] In an embodiment, the upper mold assembly further comprises:

[0019] A pressing block fixing block, a square opening is formed in the middle of the upper mold backing plate, and the pressing block fixing block is disposed in the square opening formed in the middle of the upper mold backing plate;

[0020] A rectangular spring disposed in the positioning groove, and one end of the rectangular spring is connected to the pressing block fixing block;

[0021] A slider pressing block disposed in the positioning groove and connected to the other end of the rectangular spring, the number of the slider pressing blocks is four, two adjacent slider pressing blocks on both sides form a group, and when the lower mold assembly, the core-pulling slider assembly and the upper mold assembly are fastened, each group of the slider pressing blocks is located on both sides of the first fixing piece and limits the first fixing piece.

[0022] In an embodiment, the upper mold assembly further comprises:

[0023] A wedge block, the wedge block is disposed between each group of the slider pressing blocks, the lower end of the wedge block is provided with an inclined surface, and the upper surface of the first fixing piece and the first fixing insert is provided with an inclined surface, when the lower mold assembly, the core-pulling slider assembly and the upper mold assembly are fastened, the inclined surface of the wedge block is fitted with the inclined surface of the first fixing piece and the first fixing insert, and the wedge block is used for limiting the core-pulling slider assembly.

[0024] In an embodiment, the upper mold assembly further comprises:

[0025] A column fixing block is arranged on the upper die plate, and the guide column is fixedly connected to the upper die plate through the column fixing block.

[0026] In an embodiment, the lower die assembly comprises:

[0027] A lower die plate is provided with a mounting cavity.

[0028] A lower die base plate is arranged in the mounting cavity of the lower die plate.

[0029] A lower die mounting core is arranged in the lower die base plate and in the mounting cavity of the lower die plate, and the lower die mounting core is provided with a sliding groove, and the core-pulling sliding block assembly can slide in the sliding groove.

[0030] In an embodiment, the lower die assembly further comprises:

[0031] A ball head plunger is arranged on one side of the sliding groove of the lower die mounting core, and a corresponding side of the first fixing member is provided with a circular groove, and when the core-pulling sliding block assembly slides, the sliding limit is realized through the ball head plunger and the circular groove of the first fixing member.

[0032] In an embodiment, the core-pulling sliding block assembly comprises:

[0033] A pin is used to fixedly connect the first fixing member and the first fixing insert;

[0034] A tail plate is connected to the first fixing member.

[0035] A baffle is fixedly connected to the lower die assembly, and the baffle is provided with two circular holes; two shoulder sliding rods are provided, and the two shoulder sliding rods pass through the two circular holes.

[0036] A second spring is sleeved on the shoulder sliding rod, one end of the second spring abuts against the baffle, and the other end of the second spring abuts against the shoulder of the shoulder sliding rod.

[0037] A sliding plate is connected to one end of the shoulder sliding rod passing through the circular hole.

[0038] In an embodiment, the core-pulling sliding block assembly further comprises:

[0039] A sliding block guide rail is arranged on the side surface of the sliding plate, and the sliding block guide rail is slidingly connected to the sliding plate.

[0040] In an embodiment, the core-pulling sliding block assembly further comprises:

[0041] A telescopic rod is arranged in the through hole, and the position of the through hole corresponds to the position of the tail plate;

[0042] A pulling block is arranged at one end of the telescopic rod extending out of the sliding plate;

[0043] A pulling groove is arranged in the tail plate and corresponds to the position of the pulling block.

[0044] Compared with the prior art, the utility model at least has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0045] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the present application. Furthermore, the same reference numerals are intended to denote the same components throughout the accompanying drawings. In the drawings:

[0046] Figure 1 An explosion structural block diagram of the core-pulling slider assembly and the lower die assembly of an embodiment provided by the present application;

[0047] Figure 2 An explosion structural block diagram of the upper die assembly of an embodiment provided by the present application;

[0048] Figure 3 A structural block diagram of the core-pulling slider assembly of an embodiment provided by the present application;

[0049] Figure 4 A structural block diagram of the upper die assembly of an embodiment provided by the present application;

[0050] Figure 5 A structural block diagram of the first fixing member and the first fixing insert of an embodiment provided by the present application;

[0051] Figure 6 Another perspective structural block diagram of the first fixing member and the first fixing insert of an embodiment provided by the present application;

[0052] Figure 7 A structural schematic diagram of the plastic product embedded with the metal needle of an embodiment provided by the present application.

[0053] Wherein, Figures 1-7 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0054] 100, core-pulling slider assembly; 200, lower die assembly; 300, upper die assembly;

[0055] 110. First fixing component; 120. First fixing insert; 130. Second fixing component; 140. Second fixing insert; 150. Pin; 160. Tail plate; 170. Baffle; 180. Shoulder slide bar; 190. Second spring; 111. Sliding guide rail; 112. Telescopic rod; 113. Pulling block; 114. Pulling groove;

[0056] 210. Lower mold plate; 220. Lower mold backing plate; 230. Lower mold mounting core; 240. Ball head plunger;

[0057] 310. Guide column; 320. Upper template; 330. Upper mold mounting core; 340. Upper mold pad; 350. Pressing and fixing block; 360. Rectangular spring; 370. Slider pressing block; 380. Wedge block; 390. Column fixing block. Detailed Implementation

[0058] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0059] like Figures 1-7 As shown in the embodiment of this application, an injection molding device for embedding a bent metal needle is proposed, comprising: a core-pulling slider assembly 100, the core-pulling slider assembly 100 including a first fixing member 110 and a first fixing insert 120, the first fixing insert 120 being fitted into the first fixing member 110, and one end of the bent metal needle being fixed between the first fixing member 110 and the first fixing insert 120; the core-pulling slider assembly 100 further includes a second fixing member 130 and a second fixing insert 140, the second fixing insert 140 being embedded in the second fixing insert 140, and the other end of the bent metal needle being fixed between the second fixing member 130 and the second fixing insert 140; The core-pulling slider assembly 100 further includes a first guide port; a lower mold assembly 200, wherein the second fixing member 130 and the second fixing insert 140 are installed on the lower mold assembly 200; the lower mold assembly 200 includes a second guide port; the lower mold assembly 200 includes a first injection half-port; an upper mold assembly 300 includes a guide post 310, which is used to pass through the first guide port and the second guide port, and the upper mold assembly 300 also includes a second injection half-port; when the guide post 310 passes through the first guide port and the second guide port and the lower mold assembly 200, the core-pulling slider assembly 100 and the upper mold assembly 300 are engaged, the first injection half-port and the second injection half-port are joined together.

[0060] The injection molding device provided by the embodiment of the application comprises a core-pulling slider assembly 100, a lower mold assembly 200 and an upper mold assembly 300.

[0061] The core-pulling slider assembly comprises a first fixing member 110 and a first fixing insert 120, and in use, one end of the metal needle is fixed between the first fixing member 110 and the first fixing insert 120 through extrusion, so as to fix the one end of the metal needle.

[0062] The lower mold assembly 200 comprises a second fixing member 130 and a second fixing insert 140, and in use, the other end of the metal needle is fixed between the second fixing member 130 and the second fixing insert 140 through extrusion, so as to fix the other end of the metal needle.

[0063] The upper mold assembly 300 has a guide column 310, the core-pulling slider assembly 100 has a first guide opening, the lower mold assembly 200 has a second guide opening, the upper mold assembly 300 passes through the first guide opening and the second guide opening, and the core-pulling slider assembly 100 and the lower mold assembly 200 are buckled through the limiting of the guide column 310, so as to realize that a first injection molding half of the upper mold assembly 300 and a second injection molding half of the lower mold assembly 200 are spliced into a complete injection molding opening.

[0064] The technical solution is applied to the injection molding process of a metal needle with an angle embedded in a plastic part, and in the embodiment, the angle of the metal needle is 82.5. In actual application, one end of the metal needle is fixed in the core-pulling slider assembly 100, and the other end of the metal needle is fixed in the lower mold assembly 200. It can be understood that in this state, the relative positions of the core-pulling slider assembly 100 and the lower mold assembly 200 are fixed, then the upper mold assembly 300 is buckled, the first injection molding half and the second injection molding half are passed through, the nozzle sleeve is connected to the injection molding machine and injection molding is performed, after the injection molding is completed, the upper mold assembly 300 is first pulled away, and then the core-pulling slider assembly 100 is pulled away, so as to complete the injection molding and demolding of the metal needle embedded part.

[0065] The technical solution realizes accurate positioning of the metal needle and the injection molded part, fixes both ends of the metal needle, ensures that there is no deviation in the injection molding process, and improves the stability and yield of the product.

[0066] As shown in Figures 1-7 The upper mold assembly 300 comprises an upper mold plate 320, the upper mold plate 320 is provided with a mounting cavity; an upper mold mounting core 330 is arranged in the mounting cavity of the upper mold plate 320, and a plurality of positioning grooves are arranged on one side of the upper mold mounting core 330; and an upper mold backing plate 340 is arranged in the mounting cavity of the upper mold plate and on the side without the guide rod.

[0067] In the technical scheme, the upper die assembly 300 comprises an upper die plate 320, an upper die mounting core 330 and an upper die backing plate 340.

[0068] The upper die plate 320 is used as a mounting base of the rest components of the upper die assembly 300, and a mounting cavity is formed in the upper die plate 320, which has a stepped side surface.

[0069] As shown in the figure, the upper die backing plate 340 is mounted in the mounting cavity of the upper die plate 320 and on the side without the guide rod.

[0070] As shown in the figure, the upper die mounting core 330 is arranged in the mounting cavity of the upper die plate 320 and in the mounting groove formed by the upper die backing plate 340 and the upper die plate 320, and the guide rod is arranged on the upper die mounting core 330.

[0071] In the technical scheme, the upper die assembly 300 has the upper die mounting core 330, and when the upper die assembly 300 is processed and assembled, only the upper die mounting core 330 needs to be assembled, and then the upper die mounting core 330 is arranged in the upper die plate 320 and the upper die backing plate 340, which facilitates the processing of the assembly, saves production cost, and meanwhile, the upper die plate 320 and the upper die backing plate 340 can be integrally processed and formed, thereby improving the stability of the technical scheme.

[0072] As shown in the figure, the upper die assembly 300 further comprises a pressing block fixing block, a square opening is formed in the middle of the upper die backing plate 340, and the pressing block fixing block is arranged in the square opening formed in the middle of the upper die backing plate 340. Figures 1-7 As shown in the figure, the upper die assembly 300 further comprises a pressing block fixing block, a square opening is formed in the middle of the upper die backing plate 340, and the pressing block fixing block is arranged in the square opening formed in the middle of the upper die backing plate 340.

[0073] In the technical scheme, the upper die assembly 300 further comprises a pressing block fixing block 350, a rectangular spring 360 and a sliding block pressing block 370.

[0074] As shown in the figure, a square opening is formed in the middle of the upper die backing plate 340, and the pressing block fixing block 350 is arranged in the upper die backing plate 340 through the square opening.

[0075] As shown in the figure, a plurality of positioning grooves are formed in the upper die mounting core 330 at intervals.

[0076] As shown in the figure, one end of the rectangular spring 360 is fixedly connected to the clamping block fixing block 350, and the other end of the rectangular spring 360 extends into the positioning groove opened on the upper mold mounting core 330. The number of rectangular springs 360 corresponds to the number of positioning grooves.

[0077] As shown in the figure, the slider clamping block 370 is set in the positioning groove of the upper mold mounting core 330 and connected to the other end of the rectangular spring 360. It can be understood that the slider clamping block 370 achieves extension and retraction in the positioning groove through the rectangular spring 360.

[0078] In actual use, the distance between two adjacent slider clamping blocks 370 on both sides is the same as the width of the first fixing member 110. During the process of the upper mold assembly 300 and the lower mold assembly 200 being fastened together, the slider clamping blocks 370 on both sides of the first fixing member 110 limit the slider clamping blocks 370 to prevent the slider clamping blocks 370 from moving up and down. After the upper mold assembly 300 and the lower mold assembly 200 are fastened together, the slider clamping blocks 370 retract into the positioning groove.

[0079] This design prevents the core-pulling slider assembly 100 from shifting vertically during the fastening process, thus improving the accuracy of metal pin positioning.

[0080] like Figures 1-7 As shown, the upper mold assembly 300 further includes a wedge block 380, which is provided between each group of slider pressing blocks 370. The lower end of the wedge block 380 is provided with an inclined surface. The upper surfaces of the first fixing member 110 and the first fixing insert 120 are provided with inclined surfaces. When the lower mold assembly 200, the core-pulling slider assembly 100 and the upper mold assembly 300 are fastened together, the inclined surface of the wedge block 380 is in contact with the inclined surfaces of the first fixing member 110 and the first fixing insert 120. The wedge block 380 is used to limit the position of the core-pulling slider assembly 100.

[0081] In this technical solution, the upper mold assembly 300 also includes a wedge block 380, which is disposed between each group of slider clamping blocks 370. The wedge block 380 is used for clamping. The wedge block 380 has an inclined surface. The first fixing member 110 and the first fixing insert 120 also have an inclined surface after being assembled. When the upper mold assembly 300 and the lower mold assembly 200 are engaged, the wedge block 380 limits the core-pulling slider assembly 100 through the inclined surface.

[0082] This design prevents deviations in the front-to-back direction of the core-pulling slider assembly 100 after the upper mold assembly 300 and the lower mold assembly 200 are engaged, further improving the accuracy of metal pin positioning.

[0083] like Figures 1-7As shown, the upper die assembly 300 further comprises a column fixing block 390, the guide column fixing block 390 is arranged on the upper die plate 320, and the guide column 310 is fixedly connected to the upper die plate 320 through the column fixing block 390.

[0084] In the technical scheme, the upper die assembly 300 further comprises the column fixing block 390, and the guide column 310 is fixed to the upper die plate 320 through the column fixing block 390. This arrangement can realize separate machining of the inclined guide column, thereby reducing the production cost of the injection molding device.

[0085] As shown in the drawings, Figures 1-7 As shown, the lower die assembly 200 comprises a lower die plate 210, the lower die plate 210 is provided with a mounting cavity; a lower die backing plate 220, the lower die backing plate 220 is arranged in the mounting cavity of the lower die plate 210; a lower die mounting core 230, the lower die mounting core 230 is arranged in the lower die backing plate 220 and arranged in the mounting cavity of the lower die plate 210, the lower die mounting core 230 is provided with a sliding groove, and the core-pulling sliding block assembly 100 can slide in the sliding groove.

[0086] In the technical scheme, the lower die assembly 200 comprises the lower die plate 210, the lower die backing plate 220 and the lower die mounting core 230.

[0087] The lower die plate 210 is also provided with a mounting cavity, and the side surface of the mounting cavity is stepped.

[0088] The lower die backing plate 220 is arranged in the mounting cavity of the lower die plate 210 and is located at the stepped area with a larger area.

[0089] The lower die mounting core 230 is arranged in the mounting groove formed by the lower die plate 210 and the lower die backing plate 220.

[0090] This arrangement allows the components of the lower die assembly 200 to be machined separately, thereby reducing the difficulty and cost of production.

[0091] The lower die mounting core 230 is provided with a sliding groove, which is used to place the core-pulling sliding block assembly 100. This arrangement facilitates the combination of the core-pulling sliding block assembly 100 and the lower die assembly 200, and allows the core-pulling sliding block assembly 100 to be positioned for the first time, thereby facilitating further positioning of the core-pulling sliding block assembly 100.

[0092] As shown in the drawings, Figures 1-7 As shown, the lower die assembly 200 further comprises a ball head plunger 240, the ball head plunger 240 is arranged on one side of the sliding groove of the lower die mounting core 230, and the corresponding side of the first fixing member 110 is provided with a circular groove. When the core-pulling sliding block assembly 100 slides, the ball head plunger 240 and the circular groove of the first fixing member 110 realize sliding limiting.

[0093] In the technical scheme, the lower mold assembly 200 further comprises a ball head plunger 240, the ball head plunger 240 is arranged on the side surface of the sliding groove, and the sliding groove is limited by the ball head plunger 240 to slide in the core-pulling sliding assembly. It can be understood that the side surface of the first fixing member 110 is provided with a sliding groove, and the first fixing member 110 is limited by the sliding groove to slide.

[0094] As shown in Figures 1-7 The core-pulling sliding block assembly 100 comprises a pin 150, the first fixing member 110 and the first fixing insert 120 are fixedly connected through the pin 150; a tail plate 160, the tail plate 160 is connected to the first fixing member 110; a baffle 170, the baffle 170 is fixedly connected to the lower mold assembly 200, and the baffle 170 is provided with two round holes; a shoulder sliding rod 180, the number of the shoulder sliding rod 180 is two, and the two shoulder sliding rods 180 pass through the sliding rod through the two round holes; a second spring 190, the second spring 190 is sleeved on the shoulder sliding rod 180, one end of the second spring 190 abuts against the baffle 170, and the other end of the second spring 190 abuts against the shoulder of the shoulder sliding rod 180; and a sliding plate, the sliding plate is connected to one end of the shoulder sliding rod 180 passing through the round hole.

[0095] In the technical scheme, the core-pulling sliding block assembly 100 comprises a pin 150, a tail plate 160, a baffle 170, a shoulder sliding rod 180, a second spring 190 and a sliding plate.

[0096] The first guide hole is arranged in the sliding plate, as shown in the figure, the guide column 310 has an inclination angle, when the guide column 310 passes through the first guide hole and is buckled, the guide column 310 drives the sliding plate to slide forward, and when the sliding plate slides to the limit position, the sliding plate abuts against the first fixing member 110, so that the metal needle is further limited.

[0097] When the sliding plate slides forward, the sliding plate drives the shoulder sliding rod 180 to move forward, and the shoulder sliding rod 180 compresses the second spring 190, when the injection is completed, the upper mold assembly 300 is lifted, the guide column 310 is separated from the first guide hole, and the sliding plate is reset under the action of the deformation recovery force of the second spring 190.

[0098] The setting further positions the first fixing member 110, and improves the yield during production.

[0099] As shown in Figures 1-7 The core-pulling sliding block assembly 100 further comprises a sliding block guide rail 111, the sliding block guide rail 111 is arranged on the side surface of the sliding plate, and the sliding block guide rail 111 is slidably connected with the sliding plate.

[0100] In the technical scheme, the core-pulling sliding block assembly 100 further comprises a sliding block guide rail 111.

[0101] The sliding block guide rail 111 is arranged at both sides of the sliding plate and is in sliding connection with the sliding plate. The sliding block guide rail 111 is used for limiting the sliding of the sliding block, so as to avoid the deviation of the sliding block during the sliding. The arrangement further increases the guiding property of the sliding assembly.

[0102] As shown in Figures 1-7 The core-pulling sliding block assembly 100 further comprises a telescopic rod 112, a through hole is arranged on the sliding plate, the position of the through hole corresponds to the position of the tail plate 160, and the telescopic rod 112 is arranged in the through hole; a pulling block 113, the pulling block 113 is arranged at one end of the telescopic rod 112 extending out of the sliding plate; and a pulling groove 114, the pulling groove 114 is arranged on the tail plate 160 and corresponds to the position of the pulling block 113.

[0103] In the technical scheme, the core-pulling sliding block assembly 100 further comprises the telescopic rod 112, the pulling block 113 and the pulling groove 114.

[0104] The number of the through holes arranged on the sliding plate is the same as the number of the first fixing members 110. The telescopic rod 112 is arranged in the through hole and the telescopic end extends out of the sliding plate. The pulling block 113 is arranged at the interaction end of the telescopic rod 112. Under the condition of external pressure, the pulling block 113 can be retracted into the through hole. The pulling groove 114 is arranged on the tail plate 160.

[0105] In actual use, the sliding plate slides forward under the action of the guide column 310. The pulling block 113 first slides into the pulling groove 114. With the further forward movement of the sliding plate, the pulling block 113 is retracted into the inside of the sliding plate below the tail plate 160. When the injection molding is completed, the guide column 310 is separated from the sliding plate. In the process of resetting the sliding plate, the pulling block 113 enters the pulling groove 114 again. The sliding plate continues to reset. The pulling block 113 drives the tail plate 160 to move backward through the pulling groove 114. The tail plate 160 drives the first fixing member 110 to move backward, so as to realize the automatic demolding of the first fixing member 110 and the metal needle.

[0106] It can be understood that, in order to realize the movement of the pulling block 113, the front side of the pulling block 113 is a slope and the rear side is a straight surface. The same is shown in the figure.

[0107] The arrangement realizes the automatic demolding of the metal needle, the first fixing member 110 and the second fixing member 140, reduces the steps of manual demolding, makes the production more process-oriented, avoids the deformation of the parts caused by manual demolding, and further improves the production yield.

[0108] In the present application, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and other terms should be broadly understood, for example, "connecting" can be fixed connection, can also be detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0109] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0110] In the description of the present application, the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An injection molding apparatus for embedding a curved metal needle, characterized by, The core-pulling slide block assembly comprises a first fixed assembly, the first fixed assembly comprises a first fixed piece, a first fixed insert and a tail plate, the first fixed insert is embedded in the first fixed piece, and one end of the curved metal needle can be fixed between the first fixed piece and the first fixed insert; The core-pulling slide block assembly further comprises a second fixed piece and a second fixed insert, the second fixed insert is embedded in the second fixed piece, and the other end of the curved metal needle can be fixed between the second fixed piece and the second fixed insert; The core-pulling slide block assembly further comprises a first guide hole; The second fixed piece and the second fixed insert are installed in the lower mold assembly; The lower mold assembly comprises a second guide hole; The lower mold assembly comprises a first injection molding half; The upper mold assembly comprises a guide column for passing through the first guide hole and the second guide hole, and further comprises a second injection molding half; When the guide column passes through the first guide hole and the second guide hole and the lower mold assembly, the core-pulling slide block assembly and the upper mold assembly are buckled, the first injection molding half and the second injection molding half are spliced together; The first fixed assembly is detachably connected to the remaining parts of the lower mold assembly and the core-pulling slide block assembly. The upper mold assembly comprises:

2. The injection molded device with embedded curved metal needle of claim 1, wherein, An upper mold plate provided with a mounting cavity; An upper mold mounting core arranged in the mounting cavity of the upper mold plate and provided with a plurality of positioning grooves on one side of the guide rod; An upper mold backing plate arranged in the mounting cavity of the upper mold plate and provided with no guide rod on the other side. The upper mold assembly further comprises:

3. The injection molded device with an embedded curved metal needle of claim 2, wherein, A compression block fixing block, a square opening is formed in the middle of the upper mold backing plate, and the compression block fixing block is arranged in the square opening formed in the middle of the upper mold backing plate; A rectangular spring arranged in the positioning groove and connected to one end of the compression block fixing block; A slide block compression block arranged in the positioning groove and connected to the other end of the rectangular spring, the number of the slide block compression blocks is several, and two adjacent slide block compression blocks on both sides form a group, and each group of slide block compression blocks is located on both sides of the first fixed piece and limits the first fixed piece when the lower mold assembly, the core-pulling slide block assembly and the upper mold assembly are buckled. The upper mold assembly further comprises:

4. The injection molded device with an embedded curved metal needle of claim 3, wherein, A wedge block arranged between each group of slide block compression blocks, the lower end of the wedge block is provided with an inclined surface, the upper surfaces of the first fixed piece and the first fixed insert are provided with inclined surfaces, and the inclined surface of the wedge block is matched with the inclined surfaces of the first fixed piece and the first fixed insert when the lower mold assembly, the core-pulling slide block assembly and the upper mold assembly are buckled, and the wedge block is used for limiting the core-pulling slide block assembly. The upper mold assembly further comprises:

5. The injection molded device with an embedded curved metal needle of claim 4, wherein, A column fixing block, the guide column is fixedly connected to the upper mold plate through the column fixing block. The lower mold assembly comprises:

6. The injection molded device with embedded curved metal needle of claim 1, wherein, A lower mold plate provided with a mounting cavity; A lower mold backing plate arranged in the mounting cavity of the lower mold plate; ​ A lower mold mounting core is arranged in the lower mold base plate and in a lower mold plate mounting cavity, and the lower mold mounting core is provided with a sliding groove, and the core pulling sliding block assembly can slide in the sliding groove.

7. The injection molded device with an embedded curved metal needle of claim 6, wherein, The lower mold assembly further comprises: A ball head plunger is arranged on one side of the sliding groove of the lower mold mounting core, and a corresponding side of the first fixing member is provided with a circular groove, and when the core pulling sliding block assembly slides, the ball head plunger and the circular groove of the first fixing member realize sliding limiting.

8. The injection molded device with embedded curved metal needle of claim 1, wherein, The core pulling sliding block assembly comprises: A pin is used to fixedly connect the first fixing member and the first fixing insert; A tail plate is connected to the first fixing member; A baffle is fixedly connected to the lower mold assembly, and the baffle is provided with two round holes; Two shoulder sliding rods are provided, and the two shoulder sliding rods pass through the two round holes; A second spring is sleeved on the shoulder sliding rod, one end of the second spring abuts against the baffle, and the other end of the second spring abuts against the shoulder of the shoulder sliding rod; 9. The injection molded device with an embedded curved metal needle of claim 8, wherein, A sliding plate is connected to one end of the shoulder sliding rod passing through the round hole. The core pulling sliding block assembly further comprises:

10. The injection molded device with an embedded curved metal needle of claim 8, wherein, A sliding block guide rail is arranged on the side surface of the sliding plate, and the sliding block guide rail is slidingly connected with the sliding plate. The core pulling sliding block assembly further comprises: A telescopic rod is arranged in the through hole of the sliding plate, and the position of the through hole corresponds to the position of the tail plate; A pulling block is arranged on one end of the telescopic rod extending out of the sliding plate; A pulling groove is arranged in the tail plate and corresponds to the position of the pulling block.

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