Positioning core-pulling mechanism

Abstract

The utility model discloses a positioning core-pulling mechanism which comprises an upper mold core, a lower mold core, a first side-pulling sliding block and a second side-pulling sliding block, the first side-pulling sliding block and the second side-pulling sliding block are oppositely arranged, an installation through hole is formed in the upper surface of the lower mold core, an inclined-pulling sliding block is installed in the installation through hole in a sliding mode, and the lower end of the inclined-pulling sliding block penetrates out of the installation through hole and is connected with an inclined-pulling sliding block base in a sliding mode. An obliquely-arranged inclined pulling sliding groove is formed in the end, close to the inclined pulling sliding block, of the inclined pulling sliding block base, a limiting sleeve is fixedly arranged below the inclined pulling sliding block base, the lower end of the limiting spring is connected with the bottom of the limiting sleeve, the upper end of the limiting spring is arranged on the outer side of a limiting pin in a sleeving mode, and the limiting pin is provided with a flange part outwards in the radial direction. An inner protruding part is arranged on the inner wall of the limiting sleeve, and two limiting grooves are formed in the lower surface of the inclined pulling sliding block base. According to the utility model, the precision appearance requirement of a formed product can be met, and the position precision of the inclined pulling slide block in the multiple mold opening and closing processes can be improved, so that the yield and the consistency of the product are improved.

Description

Technical Field

[0001] The utility model relates to a positioning core-pulling mechanism, belonging to the technical field of injection molds. Background Art

[0002] Currently, the production of headphones requires injection molding of the headphone shell. Injection molds are typically adapted for thermoplastic molding. Utilizing the hot melt principle of thermoplastics, the molten plastic is injected into the mold cavity via an injection molding machine. The plastic is then cooled to set, and the mold is opened to remove the plastic product. Due to the high aesthetic requirements for headphones, existing mold structures cannot meet these high aesthetic requirements. Utility Model Content

[0003] The purpose of the utility model is to provide a positioning core-pulling mechanism, which can not only meet the requirements of precise appearance of the product after molding, but also improve the position accuracy of the inclined pulling slider during multiple mold opening and closing processes, thereby improving product yield and consistency.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a positioning core-pulling mechanism, comprising: an upper mold core, a lower mold core and a first side-pulling slider and a second side-pulling slider arranged opposite to each other, the first side-pulling slider and the second side-pulling slider each being able to approach or move away from each other in a horizontal direction, the ends of the first side-pulling slider and the second side-pulling slider close to each other being able to be slidably embedded in the lower mold core, a mounting through hole extending obliquely downward is provided on the upper surface of the lower mold core and in an area between the first side-pulling slider and the second side-pulling slider, an oblique-pulling slider being slidably mounted in the mounting through hole, and when in a mold closing state, a cavity for molding a product is formed between the end surface of the upper end of the oblique-pulling slider and the upper mold core, the lower mold core and the first side-pulling slider and the second side-pulling slider close to each other;

[0005] The lower end of the inclined draw-out slide passes through a mounting through-hole and is slidably connected to an inclined draw-out slide seat that can slide in the horizontal direction. The inclined draw-out slide seat is provided with an inclined inclined draw-out slide groove at one end near the inclined draw-out slide, for the lower end of the inclined draw-out slide to be embedded in the inclined draw-out slide. The end of the inclined draw-out slide groove near the lower mold core is lower than the other end. The inclined draw-out slide whose lower end surface is in sliding contact with the bottom surface of the inclined draw-out slide groove is matched with the side wall of the inclined draw-out slide groove by at least one set of guide protrusions and guide grooves. A limiting sleeve is fixedly provided under the inclined draw-out slide seat, and the lower end of a vertically extending limit spring is connected to the limit The bottom of the positioning sleeve is connected, and the upper end of the limit spring is sleeved on the outside of a limit pin. The limit pin has a flange portion facing radially outward, and an inner convex portion cooperating with the flange portion is provided above the flange portion whose lower surface is in compression contact with the upper end face of the limit spring and on the inner wall of the limit sleeve. The lower surface of the obliquely withdrawn slider seat is provided with two limit grooves arranged at intervals along its movement direction. When the upper end face of the flange portion on the limit pin fits with the lower end face of the inner convex portion on the inner wall of the limit sleeve, the upper end of the limit pin that can move in the vertical direction is embedded in any one of the limit grooves.

[0006] The further improved scheme in the above technical scheme is as follows:

[0007] 1. In the above solution, the cross section of the limiting groove is triangular, and the upper end of the limiting groove is configured as a pointed cone.

[0008] 2. In the above solution, when in the mold closing state, the upper end of the limit pin is embedded in the limit groove away from the oblique withdrawal slider.

[0009] 3. In the above solution, a guide assembly is provided on both sides of the first side-drawing slider, the second side-drawing slider and the oblique-drawing slider seat, which are opposite to one end of the lower mold core.

[0010] 4. In the above solution, a glue injection channel communicating with the cavity is provided on the upper mold core.

[0011] 5. In the above scheme, the inner diameter of the upper section of the mounting hole on the lower mold core is smaller than the inner diameter of the lower section, thereby forming a stop step surface, and the oblique pull-out slider that slides with the mounting hole is formed with a flange surface that cooperates with the stop step surface. When in the mold closing state, the flange surface on the oblique pull-out slider is in contact with the stop step surface in the mounting hole.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model positions the core-pulling mechanism, and the lower end of the inclined pull-out slide passes through the mounting through-hole and is slidably connected to an inclined pull-out slide seat that can slide in the horizontal direction. The inclined pull-out slide seat is provided with an inclined inclined pull-out groove at one end close to the inclined pull-out slide, and the inclined pull-out groove is lower than the other end for the lower end of the inclined pull-out slide to be embedded. The inclined pull-out slide whose lower end surface is in sliding contact with the bottom surface of the inclined pull-out groove is matched with the side wall of the inclined pull-out groove by at least one set of guide protrusions and guide grooves. The inclined pull-out slide seat is provided with an inclined inclined pull-out groove at one end close to the lower mold core. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attachment Figure 1 This is a schematic diagram of the overall structure of the positioning core-pulling mechanism of the utility model;

[0015] Attachment Figure 2 This is a schematic diagram of the internal structure of the positioning core-pulling mechanism of the utility model, excluding the upper and lower mold cores;

[0016] Attachment Figure 3 for Figure 1 Schematic diagram of the section along AA' direction;

[0017] Attachment Figure 4 for Figure 1 Schematic diagram of the section along DD'.

[0018] In the above drawings: 1. Limit groove; 2. Limit spring; 3. Upper mold core; 31. Glue injection channel; 4. Lower mold core; 41. Mounting through hole; 42. Stop step surface; 51. First side pull-out slider; 52. Second side pull-out slider; 53. Positioning protrusion; 54. Positioning groove; 7. Oblique pull-out slider; 71. Flange surface; 8. Oblique pull-out slider seat; 81. Oblique pull-out slide groove; 91. Guide protrusion; 92. Guide groove; 10. Cavity; 11. Limit sleeve; 111. Inner convex portion; 12. Limit pin; 121. Flange portion. DETAILED DESCRIPTION

[0019] The present invention can be further understood through the following specific embodiments, but they are not intended to limit the present invention.

[0020] Embodiment 1: A positioning core-pulling mechanism comprises: an upper mold core 3, a lower mold core 4 and a first side-pulling slider 51 and a second side-pulling slider 52 arranged opposite to each other, wherein the first side-pulling slider 51 and the second side-pulling slider 52 can each move closer to or farther away from each other in the horizontal direction, and the ends of the first side-pulling slider 51 and the second side-pulling slider 52 that are close to each other can be slidably embedded in the lower mold core 4, and a mounting through hole 41 that extends obliquely downward is provided on the upper surface of the lower mold core 4 and in an area between the first side-pulling slider 51 and the second side-pulling slider 52, in which an oblique-pulling slider 7 is slidably mounted, and when in a mold closing state, a cavity 10 for molding a product is formed between the end surface of the upper end of the oblique-pulling slider 7 and the upper mold core 3, the lower mold core 4 and the first side-pulling slider 51 and the second side-pulling slider 52 that are close to each other;

[0021] The lower end of the oblique pull-out slider 7 passes through the mounting through-hole 41 and is slidably connected to an oblique pull-out slider seat 8 that can slide in the horizontal direction. The oblique pull-out slider seat 8 is provided with an obliquely arranged oblique pull-out slot 81 at one end close to the oblique pull-out slider 7, and the oblique pull-out slot 81 for the lower end of the oblique pull-out slider 7 to be embedded is lower than the other end of the oblique pull-out slot 81 close to the lower mold core 4. The oblique pull-out slider 7 whose lower end surface is in sliding contact with the bottom surface of the oblique pull-out slot 81 is connected to the side wall of the oblique pull-out slot 81 by at least one set of guide protrusions 91 and guide grooves 92. A limiting sleeve 11 is fixedly provided below the oblique pull-out slider seat 8, and the lower end of a vertically extending limit spring 2 is in contact with the limiting sleeve 11. The bottom is connected, and the upper end of the limit spring 2 is sleeved on the outside of a limit pin 12. The limit pin 12 has a flange portion 121 facing radially outward, and an inner convex portion 111 that cooperates with the flange portion 121 is provided above the flange portion 121 whose lower surface is in compression contact with the upper end surface of the limit spring 2 and is located on the inner wall of the limit sleeve 11. The lower surface of the obliquely withdrawn slider seat 8 is provided with two limit grooves 1 spaced apart along its movement direction. When the upper end surface of the flange portion 121 on the limit pin 12 is in contact with the lower end surface of the inner convex portion 111 on the inner wall of the limit sleeve 11, the upper end of the limit pin 12 that can move in the vertical direction is embedded in any one of the limit grooves 1.

[0022] The cross section of the limiting groove 1 is triangular, and the upper end of the limiting groove 1 is configured as a pointed cone.

[0023] When in the mold closing state, the upper end of the limiting pin 12 is embedded in the limiting groove 1 away from the oblique withdrawal slider 7.

[0024] The first side-drawing slider 51 , the second side-drawing slider 52 and the oblique-drawing slider seat 8 are each provided with a guide assembly on both sides of one end opposite to the lower die core 4 .

[0025] The upper mold core 3 is provided with a glue injection channel 31 communicating with the mold cavity 10 .

[0026] The inner diameter of the upper section of the mounting through hole 41 on the above-mentioned lower mold core 4 is smaller than the inner diameter of the lower section, thereby forming a stop step surface 42. The oblique pull-out slider 7 that slides with the mounting through hole 41 has a flange surface 71 that cooperates with the stop step surface 42. When in the mold closing state, the flange surface 71 on the oblique pull-out slider 7 is in contact with the stop step surface 42 in the mounting through hole 41.

[0027] Embodiment 2: A positioning core-pulling mechanism comprises: an upper mold core 3, a lower mold core 4 and a first side-pulling slider 51 and a second side-pulling slider 52 arranged opposite to each other, wherein the first side-pulling slider 51 and the second side-pulling slider 52 can each move closer to or farther away from each other in the horizontal direction, and the ends of the first side-pulling slider 51 and the second side-pulling slider 52 that are close to each other can be slidably embedded in the lower mold core 4, and a mounting through hole 41 that extends obliquely downward is provided on the upper surface of the lower mold core 4 and in the area between the first side-pulling slider 51 and the second side-pulling slider 52, in which an oblique-pulling slider 7 is slidably mounted, and when in the mold closing state, a cavity 10 for molding a product is formed between the end surface of the upper end of the oblique-pulling slider 7 and the upper mold core 3, the lower mold core 4 and the first side-pulling slider 51 and the second side-pulling slider 52 that are close to each other;

[0028] The lower end of the oblique pull-out slider 7 passes through the mounting through-hole 41 and is slidably connected to an oblique pull-out slider seat 8 that can slide in the horizontal direction. The oblique pull-out slider seat 8 is provided with an obliquely arranged oblique pull-out slot 81 at one end close to the oblique pull-out slider 7, and the oblique pull-out slot 81 for the lower end of the oblique pull-out slider 7 to be embedded is lower than the other end of the oblique pull-out slot 81 close to the lower mold core 4. The oblique pull-out slider 7 whose lower end surface is in sliding contact with the bottom surface of the oblique pull-out slot 81 is connected to the side wall of the oblique pull-out slot 81 by at least one set of guide protrusions 91 and guide grooves 92. A limiting sleeve 11 is fixedly provided below the oblique pull-out slider seat 8, and the lower end of a vertically extending limit spring 2 is in contact with the limiting sleeve 11. The bottom is connected, and the upper end of the limit spring 2 is sleeved on the outside of a limit pin 12. The limit pin 12 has a flange portion 121 facing radially outward, and an inner convex portion 111 that cooperates with the flange portion 121 is provided above the flange portion 121 whose lower surface is in compression contact with the upper end surface of the limit spring 2 and is located on the inner wall of the limit sleeve 11. The lower surface of the obliquely withdrawn slider seat 8 is provided with two limit grooves 1 spaced apart along its movement direction. When the upper end surface of the flange portion 121 on the limit pin 12 is in contact with the lower end surface of the inner convex portion 111 on the inner wall of the limit sleeve 11, the upper end of the limit pin 12 that can move in the vertical direction is embedded in any one of the limit grooves 1.

[0029] The cross section of the limiting groove 1 is triangular, and the upper end of the limiting groove 1 is configured as a pointed cone.

[0030] When in the mold closing state, the upper end of the limiting pin 12 is embedded in the limiting groove 1 away from the oblique withdrawal slider 7.

[0031] The inner diameter of the upper section of the mounting through hole 41 on the above-mentioned lower mold core 4 is smaller than the inner diameter of the lower section, thereby forming a stop step surface 42. The oblique pull-out slider 7 that slides with the mounting through hole 41 has a flange surface 71 that cooperates with the stop step surface 42. When in the mold closing state, the flange surface 71 on the oblique pull-out slider 7 is in contact with the stop step surface 42 in the mounting through hole 41.

[0032] When using the above-mentioned positioning core-pulling mechanism, it can not only meet the precise appearance requirements of the product after molding through the combination of three sets of core-pulling sliders, but also improve the position accuracy of the oblique pulling slider during multiple mold opening and closing processes, thereby improving product yield and consistency.

[0033] When in the mold closing state, the oblique pull-out slider is at the top of its stroke, the upper mold core and the lower mold core are close to each other in the vertical direction, and the first side pull-out slider and the second side pull-out slider are close to each other in the horizontal direction. Molten glue is injected into the mold cavity surrounded by the oblique pull-out slider, the upper mold core, the lower mold core, the first side pull-out slider and the second side pull-out slider through the glue injection channel to perform injection molding, cooling and molding of the product to be processed;

[0034] After the product is cooled and formed, the mold is opened;

[0035] The main process of mold opening is as follows:

[0036] First, the upper mold core and the lower mold core are separated, and the first side pull-out slide and the second side pull-out slide move away from each other in the horizontal direction to achieve demoulding;

[0037] Next, the oblique pull-out slider seat is driven horizontally away from the lower die until the upper end of the limit pin is embedded in the limit groove of the oblique pull-out slider seat close to the oblique pull-out slider. During this process, through the cooperation of the guide protrusion and the guide groove in the oblique pull-out slide groove, the oblique pull-out slider seat is pulled to slide downward and backward in the mounting through hole on the lower die to realize demoulding;

[0038] The mold is closed again to process and shape the next product;

[0039] The main process of mold closing is as follows:

[0040] The oblique pull-out slider seat is driven to approach the lower die core in the horizontal direction until the upper end of the limit pin is embedded in the limit groove on the oblique pull-out slider seat away from the oblique pull-out slider. The oblique pull-out slider slides forward and upward in the mounting through hole on the lower die core under the reverse push of the oblique pull-out slider seat until the flange surface on the oblique pull-out slider is in contact with the stop step surface in the mounting through hole;

[0041] The upper mold core and the lower mold core are moved closer to each other in the vertical direction, and the first side pull-out slider and the second side pull-out slider are moved closer to each other in the horizontal direction to close the mold. Then, molten glue is injected into the cavity surrounded by the oblique pull-out slider, the upper mold core, the lower mold core, the first side pull-out slider and the second side pull-out slider through the glue injection channel to perform injection molding, cooling and molding of the product to be processed.

[0042] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A positioning core pulling mechanism, comprising: The upper mold core (3), the lower mold core (4) and the first side-drawing slider (51) and the second side-drawing slider (52) arranged opposite to each other, the first side-drawing slider (51) and the second side-drawing slider (52) can each move closer to or farther away from each other in the horizontal direction, and are characterized in that: the ends of the first side-drawing slider (51) and the second side-drawing slider (52) that are close to each other can be slidably embedded in the lower mold core (4), and an installation through hole (41) that extends obliquely downward is provided on the upper surface of the lower mold core (4) and in the area between the first side-drawing slider (51) and the second side-drawing slider (52), and an inclined-drawing slider (7) is slidably installed in the installation through hole (41), and when in the mold closing state, a cavity (10) for molding a product is formed between the end surface of the upper end of the inclined inclined-drawing slider (7) and the upper mold core (3), the lower mold core (4) and the first side-drawing slider (51) and the second side-drawing slider (52) that are close to each other; The lower end of the inclined pull-out slider (7) passes through the mounting through hole (41) and is slidably connected to an inclined pull-out slider seat (8) that can slide in the horizontal direction. The inclined pull-out slider seat (8) is provided with an inclined inclined pull-out groove (81) at one end close to the inclined pull-out slider (7). The inclined pull-out groove (81) for the lower end of the inclined pull-out slider (7) to be embedded is lower than the other end of the inclined pull-out groove (81) close to the lower mold core (4). The inclined pull-out slider (7) whose lower end surface is in sliding contact with the bottom surface of the inclined pull-out groove (81) is connected to the side wall of the inclined pull-out groove (81) through at least one set of guide protrusions (91) and guide grooves (92). A limiting sleeve (11) is fixedly provided below the inclined pull-out slider seat (8). The lower end of a vertically extending limiting spring (2) is connected to the limiting sleeve (11). The bottom of the limiting spring (2) is connected, the upper end of the limiting spring (2) is sleeved on the outside of a limiting pin (12), and the limiting pin (12) has a flange portion (121) radially outward, and an inner convex portion (111) is provided on the inner wall of the limiting sleeve (11) above the flange portion (121) whose lower surface is in compression contact with the upper end surface of the limiting spring (2) and cooperates with the flange portion (121). The lower surface of the inclined sliding block seat (8) is provided with two limiting grooves (1) spaced apart along its movement direction. When the upper end surface of the flange portion (121) on the limiting pin (12) is in contact with the lower end surface of the inner convex portion (111) on the inner wall of the limiting sleeve (11), the upper end of the limiting pin (12) that can move in the vertical direction is embedded in any one of the limiting grooves (1).

2. The positioning core-pulling mechanism according to claim 1, characterized in that: The cross section of the limiting groove (1) is triangular, and the upper end of the limiting groove (1) is configured as a pointed cone.

3. The positioning core-pulling mechanism according to claim 1, characterized in that: When in the mold closing state, the upper end of the limit pin (12) is embedded in the limit groove (1) away from the oblique withdrawal slide block (7).

4. The positioning core-pulling mechanism according to claim 1 or 3, characterized in that: The first side-drawing slider (51), the second side-drawing slider (52) and the oblique-drawing slider seat (8) are each provided with a guide assembly on both sides of one end opposite to the lower die core (4).

5. The positioning core-pulling mechanism according to claim 1, characterized in that: The upper mold core (3) is provided with a glue injection channel (31) communicating with the mold cavity (10).

6. The positioning core-pulling mechanism according to claim 1, characterized in that: The inner diameter of the upper section of the mounting through hole (41) on the lower mold core (4) is smaller than the inner diameter of the lower section, thereby forming a stop step surface (42). The inclined pull-out slider (7) that slides with the mounting through hole (41) is formed with a flange surface (71) that cooperates with the stop step surface (42). When in the mold closing state, the flange surface (71) on the inclined pull-out slider (7) is in contact with the stop step surface (42) in the mounting through hole (41).

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