Inner core-pulling mechanism of injection mold
By introducing pads, scrapers, cooling and lubrication mechanisms into the core extraction mechanism of the injection mold, the problems of sliders stuck and mold damage are solved, and the stability of the injection molding process and the long life of the mold are achieved.
Patent Information
- Application Number
- CN202421840401.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The core extraction mechanism of traditional injection molds is prone to the slider being stuck due to plastic chips and long-term use, which in turn causes the inclined guide column to break and mold damage.
An internal core extraction mechanism of injection mold is designed. By setting up a pad plate and scraper, the slider is prevented from contacting the moving template, and the plastic chips are removed, and the cooling mechanism and lubrication mechanism are used to ensure the smooth operation of the mold during the mold opening and closing process.
Effectively prevent the slider from being stuck, avoid mold damage, ensure the continuity and efficiency of the injection molding process, and extend the service life of the mold through lubrication and cooling mechanisms.
Smart Images
Figure CN222875195U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plastic molds, in particular to an inner core-pulling mechanism of an injection mold. Background Art
[0002] Injection molding is a method of producing industrial products, and the plastic mold used in the injection molding process is a tool that matches plastic processing and plastic molding machines and gives plastic products a complete configuration and precise size. The core pulling in the plastic mold is used to deal with the position on the parting surface of the injection molded part that cannot be demolded. It belongs to the "underhook processing system" and is a structure of the mold. Its main function is to ensure the smooth demolding of the product. For example, if there is a hole on the side of the plastic part, after the mold is opened, if the core of this hole is not pulled out, the product cannot be ejected. At this time, the mold structure must adopt a slider structure, and the core of the hole is made movable. The inclined guide column is used to cooperate with the fixed mold, and the slider is moved as the mold is opened or closed. This movement is called core pulling.
[0003] The traditional core pulling mechanism uses a T-block to connect the support machine and the inner pull-out slide. During the up and down movements, there are different force-bearing mating surfaces. In actual use, due to the generation of plastic chips and long-term lack of lubrication, the slide may get stuck and cannot be pulled out, resulting in the breakage of the inclined guide column. In severe cases, it can also cause compression molding, resulting in mold damage and economic losses.
[0004] Therefore, it is urgent to propose an internal core pulling mechanism for an injection mold to solve the technical problems existing in the above-mentioned prior art. Utility Model Content
[0005] The utility model aims to provide an inner core-pulling mechanism for an injection mold, which has the advantages of preventing a slide block from getting stuck and lubricating a wedge block, thereby solving the problems existing in the prior art.
[0006] To achieve the above-mentioned purpose, the utility model proposes the following technical scheme: an internal core pulling mechanism of an injection mold, comprising a movable template and a fixed template, the movable template is slidably connected with a wedge block, the fixed template is fixedly connected with a shovel block, the shovel block abuts against the wedge block, a slider is installed on the wedge block, a rotating shaft is rotatably connected in the wedge block, a gear is fixedly connected to the rotating shaft, a torsion spring is sleeved on the rotating shaft, one end of the torsion spring is fixedly connected to the gear, and the other end of the torsion spring is fixedly connected in the wedge block, the shovel block is provided with intermittent teeth, the gear is intermittently meshed with the teeth on the shovel block, and the gear is intermittently meshed with the teeth on the shovel block. A spiral groove is provided on the wheel, a piston rod is slidably connected in the wedge block, a spherical block is fixedly connected to the piston rod, the spherical block is slidably connected in the spiral groove, a pad is slidably connected to the bottom of the slider, a mounting rod is fixedly connected to the pad, an inclined rod is slidably connected to the mounting rod, the inclined rod is fixedly connected to the piston rod, a scraper block is slidably connected to the bottom of the slider, the pad and the scraper block are both fitted with the movable template, a tension spring is fixedly connected to the scraper block, the tension spring is fixedly connected to the slider, the pad is abutted against the scraper block, and a cooling mechanism for cooling the injection molded product is provided in the movable template.
[0007] Preferably, the cooling mechanism includes a box body, the box body is fixedly connected in the moving template, the wedge block is fixedly connected with a piston cylinder, the piston rod is fixedly connected with a piston plate, the piston plate is slidably connected in the piston cylinder, the piston cylinder is fixedly connected with an exhaust pipe and an intake pipe, the end of the exhaust pipe away from the piston cylinder is fixedly connected to the box body, the end of the intake pipe away from the piston cylinder is fixedly connected to the scraper block, the scraper block is provided with an intake port communicated with the intake pipe, and the intake pipe and the exhaust pipe are both provided with a first one-way valve.
[0008] Preferably, the cooling mechanism also includes a slide plate, which is slidably connected in a box body, and the box body is filled with coolant at the bottom of the slide plate. A telescopic rod is fixedly connected to the bottom of the slide plate, and one end of the telescopic rod away from the slide plate is fixedly connected to the box body, and a spring is sleeved on the telescopic rod, and the two ends of the spring are respectively against the slide plate and the box body, and a cooling pipe is fixedly connected to the box body at the lower part of the slide plate, and one end of the cooling pipe away from the box body is fixedly connected to the moving template, and a second one-way valve is provided on the cooling pipe and the liquid replenishing pipe, and a lubrication mechanism for lubricating the connection between the wedge block and the shovel block is provided on the cooling mechanism.
[0009] Preferably, the lubrication mechanism includes a box body, the upper part of the box body is filled with lubricating oil, the wedge block and the shovel block are provided with oil grooves, an oil spray pipe is fixedly connected to the box body, an atomizing nozzle is fixedly connected to the end of the oil spray pipe away from the box body, and the atomizing nozzle faces the wedge block.
[0010] Preferably, the lubrication mechanism also includes a rotary switch, which is arranged on the oil injection pipe, and an inclined groove is opened on the rotary switch. A plug rod is fixedly connected to the fixed template, and a convex strip is fixedly connected to the plug rod, and the convex strip is slidably connected in the inclined groove. The two ends of the convex strip are respectively fixedly connected with a first triangular block and a second triangular block, and the first triangular block and the second triangular block are both fixedly connected to the plug rod. The first triangular block is located at the upper part of the rotary switch, and the second triangular block is located at the lower part of the rotary switch, and the first triangular block and the second triangular block are both against the rotary switch.
[0011] Preferably, an inclined guide column is fixedly connected to the fixed template, and a socket that cooperates with the inclined guide column is provided on the wedge block.
[0012] Preferably, a pressure strip is installed on the movable template, and the pressure strip abuts against the wedge block.
[0013] Preferably, the number of the wedge blocks is two groups, and the two groups of wedge blocks are symmetrically distributed on both sides of the movable template.
[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0015] The present application provides a pad so that the pad can slide and shrink relative to the slider when the mold is opened, thereby preventing the slider from directly contacting the moving template. The pad pushes the scraper block to slide while sliding to push away plastic chips near the slider, thereby preventing the plastic chips from getting stuck in the slider, thereby avoiding the slider from getting stuck when the mold is opened. A cold zone mechanism is provided so that the pad provides pressure to the flow of coolant when sliding, so that the coolant can flow in the moving template to cool and mold the plastic product. A lubrication mechanism is provided so that the pressure in the mold box is released when the mold is opened, and lubricating oil is sprayed onto the wedge block, so that the contact between the shovel block and the wedge block is lubricated, thereby preventing damage and jamming caused by wear and burns during contact between the two. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and their implementation methods.
[0017] Figure 1 It is a structural schematic diagram of the utility model in the mold closing state;
[0018] Figure 2 It is a structural schematic diagram of the fixed template of the utility model;
[0019] Figure 3 It is a structural schematic diagram of the movable template of the utility model;
[0020] Figure 4 For this utility model Figure 3 The structural diagram of part A in the figure;
[0021] Figure 5 This is a schematic diagram of the internal structure of the wedge block of the utility model;
[0022] Figure 6 It is a schematic diagram of the structure of the spiral groove of the utility model;
[0023] Figure 7 It is a structural schematic diagram of the box body of the utility model;
[0024] Figure 8 This is a schematic diagram of the structure of the exhaust pipe of the utility model;
[0025] Fig. 9 This is a schematic diagram of the structure of the scraper block of the utility model;
[0026] Fig.10 This is a schematic diagram of the structure of the rotary switch of the utility model;
[0027] Fig.11 It is a structural schematic diagram of the plug rod of the utility model. DETAILED DESCRIPTION
[0028] The various aspects of the utility model are further described in detail below.
[0029] Unless otherwise defined or indicated, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein can be applied to the present invention.
[0030] Unless otherwise clearly specified and limited, the "or" mentioned in the present invention includes the relationship of "and". The "and" is equivalent to the Boolean logic operator "AND", the "or" is equivalent to the Boolean logic operator "OR", and "AND" is a subset of "OR".
[0031] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, the first element may be referred to as the second element without departing from the teachings of the present invention.
[0032] In the present invention, the terms “mainly composed of” and “consisting of” are included in the terms “containing”, “including” or “comprising”.
[0033] Unless otherwise clearly specified and limited, the terms "connected", "connected" and "connection" in the present invention should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0034] For example, if an element (or component) is referred to as being on, coupled to, or connected to another element, the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intervening elements between them. In contrast, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, then no intervening elements are indicated. Other words used to describe the relationship between elements should be similarly interpreted, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," and the like.
[0035] It should also be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The words "inner" and "outer" used refer to directions toward or away from the geometric center of a particular component, respectively. It can be understood that these terms are used here to describe the relationship of one element, layer or region relative to another element, layer or region as shown in the drawings. In addition to the orientations described in the drawings, these terms should also include other orientations of the device.
[0036] Other aspects of the present invention will be apparent to those skilled in the art from the disclosure herein.
[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.
[0038] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation may be changed arbitrarily, and the component layout may also be more complicated. For example, the thickness of the components in the drawings may be exaggerated for the sake of clarity.
[0039] Example 1
[0040] See attached Figure 1 To Attachment Figure 4 The utility model proposes an inner core pulling mechanism of an injection mold, comprising a movable template 1 and a fixed template 2, a wedge block 3 is slidably connected to the movable template 1, a shovel block 201 is fixedly connected to the fixed template 2, the shovel block 201 abuts against the wedge block 3, a slider 5 is installed on the wedge block 3, a rotating shaft 3011 is rotatably connected inside the wedge block 3, a gear 301 is fixedly connected to the rotating shaft 3011, a torsion spring 3012 is sleeved on the rotating shaft 3011, one end of the torsion spring 3012 is fixedly connected to the gear 301, and the other end of the torsion spring 3012 is fixedly connected to the wedge block 3, an intermittent tooth 2012 is provided on the shovel block 201, the gear 301 is intermittently meshed with the tooth 2012 on the shovel block 201, and the gear 301 is on the gear 301. A spiral groove 3013 is provided, a piston rod 304 is slidably connected in the wedge block 3, a spherical block 3043 is fixedly connected to the piston rod 304, the spherical block 3043 is slidably connected in the spiral groove 3013, a pad 502 is slidably connected to the bottom of the slider 5, a mounting rod 5021 is fixedly connected to the pad 502, an inclined rod 3042 is slidably connected to the mounting rod 5021, the inclined rod 3042 is fixedly connected to the piston rod 304, a scraper block 501 is slidably connected to the bottom of the slider 5, a tension spring 5011 is fixedly connected to the scraper block 501, the tension spring 5011 is fixedly connected to the slider 5, the pad 502 abuts against the scraper block 501, and a cooling mechanism for cooling the injection molded product is provided in the movable template 1.
[0041] During the mold closing process, the movable template 1 is close to the fixed template 2. At this time, the shovel block 201 contacts the wedge block 3 and squeezes the wedge block 3 to push the wedge block 3 to slide. During the sliding process of the wedge block 3, the shovel block 201 and the wedge block 3 are always in contact, so that the teeth 2012 on the shovel block 201 are engaged with the gear 301. The teeth 2012 are intermittently designed, so that the gear 301 and the teeth 2012 are intermittently engaged, so that when the teeth 2012 and the gear 301 are engaged, the gear 301 is driven to rotate, and when the teeth 2012 and the gear 301 are not engaged, the torsion of the torsion spring 3012 is released to make the gear 301 rotate in the opposite direction, so that the gear 301 forms an alternating clockwise and counterclockwise rotation action, and the spherical block 3043 on the piston rod 304 is slidably connected in the spiral groove 3013 on the gear 301, so that the piston rod 304 slides up and down and is fixedly connected to the piston rod 304. The inclined rod 3042 on the movable plate 1 slides up and down synchronously. Since the inclined rod 3042 is slidably connected to the mounting rod 5021, the mounting rod 5021 slides back and forth, and the pad 502 slides back and forth. At this time, the pad 502 pushes the scraper block 501 to expand, and then when the pad 502 slides to the end of the stroke, the scraper block 501 is reset under the action of the tension spring 5011, so that the scraper block 501 also slides back and forth under the reciprocating push of the pad 502 and the tension of the tension spring 5011. Since the pad 502 and the scraper block 501 are both in contact with the movable template 1, the sliding pad 502 and the scraper block 501 push away the plastic chips near the slider 5 to prevent the plastic chips from jamming the slider 5. When the mold is closed, the gear 301 no longer rotates, and at this time the slider 5 can run to the end, the pad 502 also runs to the end, and is located below the slider 5 to form a seal to prevent the molten plastic material from overflowing.
[0042] Reference Figures 5 to 9The cooling mechanism includes a box body 302, which is fixedly connected to the movable template 1, a piston cylinder 303 is fixedly connected to the wedge block 3, a piston plate 3041 is fixedly connected to the piston rod 304, and the piston plate 3041 is slidably connected to the piston cylinder 303. An exhaust pipe 3032 and an intake pipe 5012 are fixedly connected to the piston cylinder 303. One end of the exhaust pipe 3032 away from the piston cylinder 303 is fixedly connected to the box body 302, and one end of the intake pipe 5012 away from the piston cylinder 303 is fixedly connected to the scraper block 501. An air inlet communicating with the intake pipe 5012 is provided on the scraper block 501. The intake pipe 5012 and the exhaust pipe 3032 are both provided with a first non-return valve 3031. The cooling mechanism also includes a slide plate 3023, which is slidably connected to the box body 302. The slide plate 3023 is located in the box body 302. The bottom of the plate 3023 is filled with coolant, and a telescopic rod 3024 is fixedly connected to the bottom of the slide plate 3023. The end of the telescopic rod 3024 away from the slide plate 3023 is fixedly connected in the box body 302. A spring 3025 is sleeved on the telescopic rod 3024. The two ends of the spring 3025 are respectively against the slide plate 3023 and the box body 302. A cooling pipe 3026 is fixedly connected to the box body 302 at the lower part of the slide plate 3023. The end of the cooling pipe 3026 away from the box body 302 is fixedly connected to the movable template 1. A liquid replenishing pipe 3029 is fixedly connected to the box body 302. The end of the liquid replenishing pipe 3029 away from the box body 302 is connected to the external liquid supply. A second one-way valve 3027 is provided on the cooling pipe 3026 and the liquid replenishing pipe 3029, and a lubrication mechanism for connecting the lubricating wedge block 3 and the shovel block 201 is provided on the cooling mechanism.
[0043] When the piston rod 304 slides up and down, the piston plate 3041 slides up and down synchronously. The piston plate 3041 is slidably connected to the piston cylinder 303. Since the first one-way valve 3031 is provided on the intake pipe 5012 and the exhaust pipe 3032, the piston plate 3041 sucks the gas into the piston cylinder 303 through the intake port on the scraper block 501 when sliding upward in the piston cylinder 303. The sliding pad 502 scrapes the intake port on the scraper block 501 to prevent the intake port from being blocked. When the piston plate 3041 slides downward, the gas in the piston cylinder 303 is pushed into the box body 302. At this time, the pressure in the box body 302 at the upper part of the slide plate 3023 increases, so that the slide plate 3023 moves downward, pushing out the coolant in the box body 302. A second one-way valve 3027 is provided on the cooling pipe 3026 and the liquid replenishing pipe 3029, so that the coolant flows out from the cooling pipe 3026 to cool the movable template 1, and the cooled coolant is discharged from the movable template 1.
[0044] See attached Figure 5 To Attachment Fig.11The lubrication mechanism includes a box body 302, the upper part of the slide plate 3023 in the box body 302 is filled with lubricating oil, the wedge block 3 and the shovel block 201 are provided with oil grooves 3001, the box body 302 is fixedly connected with an oil spray pipe 3021, and the end of the oil spray pipe 3021 away from the box body 302 is fixedly connected with an atomizing nozzle 3028, and the atomizing nozzle 3028 faces the wedge block 3, and the lubrication mechanism also includes a rotary switch 3022, which is arranged on the oil spray pipe 3021, and the rotary switch 3022 is provided with an inclined slot 2024, and the fixed template 2 is fixedly connected There is an insertion rod 202, on which a convex strip 2021 is fixedly connected, and the convex strip 2021 is slidably connected in an inclined groove 2024, and both ends of the convex strip 2021 are respectively fixedly connected with a first triangular block 2022 and a second triangular block 2023, and both the first triangular block 2022 and the second triangular block 2023 are fixedly connected to the insertion rod 202, the first triangular block 2022 is located at the upper part of the rotating switch 3022, and the second triangular block 2023 is located at the lower part of the rotating switch 3022, and both the first triangular block 2022 and the second triangular block 2023 are against the rotating switch 3022.
[0045] When the mold is opened, the movable mold plate 1 moves away from the fixed mold plate 2. At this time, the shovel block 201 no longer squeezes the wedge block 3, and the wedge block 3 is reset. At the same time, the gear 301 is driven to rotate in the opposite direction. At this time, the rotating gear 301 drives the pad 502 to be withdrawn backward relative to the slider 5, so that the slider 5 does not directly contact the movable mold plate 1 to avoid jamming. At the same time, the insertion rod 202 on the fixed mold plate 2 slides upward, so that the second triangular block 2023 enters the inclined groove 2024 to push the rotary switch 3022 to rotate. At this time, the oil injection pipe 3021 is unblocked, so that the pressure in the box 302 is released, and the high pressure makes the lubricating oil in the box 302 appear in a gaseous state, so that the gaseous lubricating oil flows out from the oil injection pipe 3021, and then is sprayed through the atomizing nozzle 3028 to the wedge block 3 for lubrication.
[0046] See attached Figure 2 To Attachment Figure 3 An inclined guide column 2011 is fixedly connected to the fixed template 2, and a socket that cooperates with the inclined guide column 2011 is opened on the wedge block 3. A pressure strip 4 is installed on the movable template 1, and the pressure strip 4 is against the wedge block 3. The number of wedge blocks 3 is specifically two groups, and the two groups of wedge blocks 3 are symmetrically distributed on both sides of the movable template 1.
[0047] When closing the mold, the inclined guide column 2011 is inserted into the wedge block 3, which promotes the shovel block 201 to push the wedge block 3. When installing or removing the slider 5, the pressure strip 4 can be disassembled and assembled. According to actual production needs, multiple products can be produced in one mold, and the number of sliders 5 can be increased or decreased according to the number of products produced.
[0048] Example 2
[0049] See attached Figure 1-11, an internal core pulling mechanism of an injection mold, comprising a movable template 1 and a fixed template 2, a wedge block 3 is slidably connected to the movable template 1, a shovel block 201 is fixedly connected to the fixed template 2, the shovel block 201 abuts against the wedge block 3, a slider 5 is installed on the wedge block 3, a rotating shaft 3011 is rotatably connected inside the wedge block 3, a gear 301 is fixedly connected to the rotating shaft 3011, a torsion spring 3012 is sleeved on the rotating shaft 3011, one end of the torsion spring 3012 is fixedly connected to the gear 301, and the other end of the torsion spring 3012 is fixedly connected to the wedge block 3, an intermittent tooth 2012 is provided on the shovel block 201, the gear 301 is intermittently meshed with the tooth 2012 on the shovel block 201, and a screw is provided on the gear 301 The spiral groove 3013 is provided, and a piston rod 304 is slidably connected in the wedge block 3. A spherical block 3043 is fixedly connected to the piston rod 304. The spherical block 3043 is slidably connected in the spiral groove 3013. A pad 502 is slidably connected to the bottom of the slider 5. A mounting rod 5021 is fixedly connected to the pad 502. An inclined rod 3042 is slidably connected to the mounting rod 5021. The inclined rod 3042 is fixedly connected to the piston rod 304. A scraper block 501 is slidably connected to the bottom of the slider 5. A tension spring 5011 is fixedly connected to the scraper block 501. The tension spring 5011 is fixedly connected to the slider 5. The pad 502 abuts against the scraper block 501. A cooling mechanism for cooling the injection molded product is provided in the movable mold plate 1.
[0050] When closing the mold, the shovel block 201 pushes the wedge block 3 to slide, so that the slider 5 moves to the specified position. At the same time, the gear 301 rotates alternately clockwise and counterclockwise, so that the piston rod 304 slides up and down to provide power for the circulation of the coolant. When the piston rod 504 slides, the pad 502 slides and pushes the scraper block 501 to slide, and the plastic chips in the area near the slider 5 are cleaned to prevent the slider 5 from getting stuck. The sliding pad 502 scratches the air inlet hole on the scraper block 501 to prevent the air inlet hole from being blocked. When opening the mold, the rotary switch 3022 rotates to release the pressure in the box 302, so that the lubricating oil sprays out to lubricate the wedge block 3.
[0051] Working principle: When the inner core pulling mechanism of the injection mold is used, the movable template 1 approaches the fixed template 2 during the mold closing process. At this time, the shovel block 201 contacts the wedge block 3 and squeezes the wedge block 3 to push the wedge block 3 to slide. During the sliding process of the wedge block 3, the shovel block 201 and the wedge block 3 are always in contact, so that the teeth 2012 on the shovel block 201 are meshed with the gear 301. The teeth 2012 are intermittently designed, so that the gear 301 and the teeth 2012 are intermittently meshed, so that when the teeth 2012 and the gear 301 are meshed, the gear 301 is driven to rotate, and when the teeth 2012 and the gear 301 are not meshed, the torsion of the torsion spring 3012 is released to make the gear 301 rotate in the opposite direction, so that the gear 301 forms an alternating clockwise and counterclockwise rotation action, and the spherical block 3043 on the piston rod 304 is slidably connected in the spiral groove 3013 on the gear 301, so that the piston rod 304 slides up and down, The inclined rod 3042 fixedly connected to the piston rod 304 slides up and down synchronously. Since the inclined rod 3042 is slidably connected to the mounting rod 5021, the mounting rod 5021 slides back and forth, and the pad 502 slides back and forth. At this time, the pad 502 pushes the scraper block 501 to expand, and then when the pad 502 slides to the end of the stroke, the scraper block 501 is reset under the action of the tension spring 5011, so that the scraper block 501 also slides back and forth under the reciprocating push of the pad 502 and the tension of the tension spring 5011. Since the pad 502 and the scraper block 501 are both in contact with the movable template 1, the sliding pad 502 and the scraper block 501 push away the plastic chips near the slider 5 to prevent the plastic chips from jamming the slider 5. When the mold is closed, the gear 301 no longer rotates, and at this time the slider 5 can run to the end, and the pad 502 also runs to the end, forming a seal below the slider 5 to prevent the molten plastic material from overflowing;
[0052] When the piston rod 304 slides up and down, the piston plate 3041 slides up and down synchronously. The piston plate 3041 is slidably connected to the piston cylinder 303. Since the first one-way valve 3031 is provided on the intake pipe 5012 and the exhaust pipe 3032, the piston plate 3041 sucks the gas into the piston cylinder 303 through the intake port on the scraper block 501 when sliding upward in the piston cylinder 303. The sliding pad 502 scrapes the intake port on the scraper block 501 to prevent the intake port from being blocked. When the piston plate 3041 slides downward, the gas in the piston cylinder 303 is pushed into the box body 302. At this time, the pressure in the box body 302 at the upper part of the slide plate 3023 increases, so that the slide plate 3023 moves downward, pushing out the coolant in the box body 302. The cooling pipe 3026 and the liquid replenishing pipe 3029 are both provided with a second one-way valve 3027, so that the coolant flows out from the cooling pipe 3026 to cool the movable template 1, and the cooled coolant is discharged from the movable template 1.
[0053] When the mold is opened, the movable mold plate 1 is away from the fixed mold plate 2. At this time, the shovel block 201 no longer squeezes the wedge block 3, and the wedge block 3 is reset. At the same time, the gear 301 is driven to rotate in the opposite direction. At this time, the rotating gear 301 drives the pad 502 to be withdrawn relative to the slider 5, so that the slider 5 does not directly contact the movable mold plate 1 to avoid being stuck. At the same time, the insertion rod 202 on the fixed mold plate 2 slides upward, so that the second triangular block 2023 enters the inclined groove 2024 to push the rotary switch 3022 to rotate. At this time, the oil injection pipe 3021 is unblocked, so that the box body The pressure in 302 is released, and the high pressure makes the lubricating oil in the box 302 gaseous, so that the gaseous lubricating oil flows out from the oil injection pipe 3021, and then is sprayed onto the wedge block 3 through the atomizing nozzle 3028 for lubrication. When the mold is closed, the inclined guide column 2011 is inserted into the wedge block 3, which promotes the shovel block 201 to push the wedge block 3. When installing or removing the slider 5, the pressure strip 4 can be disassembled and assembled. According to actual production needs, multiple products can be produced in one mold, and the number of sliders 5 can be increased or decreased according to the number of products produced.
[0054] Based on this application, it should be understood by those skilled in the art that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.
[0055] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.
[0056] All documents mentioned in this utility model are cited as references in this application, just as each document is cited as reference separately. In addition, it should be understood that after reading the above content of this utility model, those skilled in the art can make various changes or modifications to this utility model, and these equivalent forms also fall within the scope defined by the claims attached to this application.
Claims
1. An internal core pulling mechanism of an injection mold, comprising a movable mold plate (1) and a fixed mold plate (2), wherein a wedge block (3) is slidably connected to the movable mold plate (1), and a shovel block (201) is fixedly connected to the fixed mold plate (2), wherein the shovel block (201) abuts against the wedge block (3), and is characterized in that: The wedge block (3) is provided with a slider (5), a rotating shaft (3011) is rotatably connected in the wedge block (3), a gear (301) is fixedly connected to the rotating shaft (3011), a torsion spring (3012) is sleeved on the rotating shaft (3011), one end of the torsion spring (3012) is fixedly connected to the gear (301), and the other end of the torsion spring (3012) is fixedly connected in the wedge block (3), the shovel block (201) is provided with intermittent teeth (2012), the gear (301) is intermittently meshed with the teeth (2012) on the shovel block (201), a spiral groove (3013) is provided on the gear (301), a piston rod (304) is slidably connected in the wedge block (3), and a spherical block (3043) is fixedly connected to the piston rod (304), The spherical block (3043) is slidably connected in the spiral groove (3013); a pad (502) is slidably connected to the bottom of the slider (5); a mounting rod (5021) is fixedly connected to the pad (502); an inclined rod (3042) is slidably connected to the mounting rod (5021); the inclined rod (3042) is fixedly connected to the piston rod (304); a scraper block (501) is slidably connected to the bottom of the slider (5); the pad (502) and the scraper block (501) are both fitted to the movable template (1); a tension spring (5011) is fixedly connected to the scraper block (501); the tension spring (5011) is fixedly connected to the slider (5); the pad (502) and the scraper block (501) are abutted against each other; a cooling mechanism for cooling the injection molded product is provided in the movable template (1).
2. The inner core pulling mechanism of an injection mold according to claim 1, characterized in that: The cooling mechanism comprises a box body (302), wherein the box body (302) is fixedly connected to the movable mold plate (1), a piston cylinder (303) is fixedly connected to the wedge block (3), a piston plate (3041) is fixedly connected to the piston rod (304), the piston plate (3041) is slidably connected to the piston cylinder (303), an exhaust pipe (3032) and an intake pipe (5012) are fixedly connected to the piston cylinder (303), one end of the exhaust pipe (3032) away from the piston cylinder (303) is fixedly connected to the box body (302), one end of the intake pipe (5012) away from the piston cylinder (303) is fixedly connected to the scraper block (501), an air inlet communicating with the intake pipe (5012) is provided on the scraper block (501), and a first one-way valve (3031) is provided on both the intake pipe (5012) and the exhaust pipe (3032).
3. The inner core pulling mechanism of an injection mold according to claim 2, characterized in that: The cooling mechanism further comprises a slide plate (3023), wherein the slide plate (3023) is slidably connected in the box body (302), wherein the box body (302) is filled with a coolant at the bottom of the slide plate (3023), wherein a telescopic rod (3024) is fixedly connected to the bottom of the slide plate (3023), wherein one end of the telescopic rod (3024) away from the slide plate (3023) is fixedly connected in the box body (302), and a spring (3025) is sleeved on the telescopic rod (3024), wherein the spring (3025) ) are respectively abutted against the slide plate (3023) and the box body (302); a cooling pipe (3026) is fixedly connected to the lower part of the slide plate (3023) on the box body (302); one end of the cooling pipe (3026) away from the box body (302) is fixedly connected to the movable template (1); a second one-way valve (3027) is provided on the cooling pipe (3026) and the liquid replenishing pipe (3029); and a lubricating mechanism for connecting the lubricating wedge block (3) and the shovel block (201) is provided on the cooling mechanism.
4. The inner core pulling mechanism of an injection mold according to claim 3, characterized in that: The lubrication mechanism comprises a box (302), wherein the upper portion of the slide plate (3023) in the box (302) is filled with lubricating oil, the wedge block (3) and the shovel block (201) are both provided with oil grooves (3001), an oil spray pipe (3021) is fixedly connected to the box (302), an atomizing nozzle (3028) is fixedly connected to one end of the oil spray pipe (3021) away from the box (302), and the atomizing nozzle (3028) faces the wedge block (3).
5. The inner core pulling mechanism of the injection mold according to claim 4, characterized in that: The lubricating mechanism further comprises a rotary switch (3022), the rotary switch (3022) being arranged on the oil injection pipe (3021), the rotary switch (3022) being provided with an inclined groove (2024), the fixed template (2) being fixedly connected with an insertion rod (202), the insertion rod (202) being fixedly connected with a convex strip (2021), the convex strip (2021) being slidably connected in the inclined groove (2024), and the two ends of the convex strip (2021) being respectively fixedly connected with the convex strip (2021) and the convex strip (2021) being fixedly connected with the convex strip (2021). A first triangular block (2022) and a second triangular block (2023) are provided. The first triangular block (2022) and the second triangular block (2023) are both fixedly connected to the plug rod (202). The first triangular block (2022) is located at the upper part of the rotating switch (3022), and the second triangular block (2023) is located at the lower part of the rotating switch (3022). The first triangular block (2022) and the second triangular block (2023) are both against the rotating switch (3022).
6. The inner core pulling mechanism of an injection mold according to claim 1, characterized in that: An inclined guide column (2011) is fixedly connected to the fixed template (2), and a plug hole cooperating with the inclined guide column (2011) is provided on the wedge block (3).
7. The inner core pulling mechanism of an injection mold according to claim 1, characterized in that: A pressure strip (4) is installed on the movable template (1), and the pressure strip (4) abuts against the wedge block (3).
8. The inner core pulling mechanism of an injection mold according to claim 1, characterized in that: The number of the wedge blocks (3) is specifically two groups, and the two groups of wedge blocks (3) are symmetrically distributed on both sides of the movable template (1).