A device for demolding an injection molded part

Abstract

The utility model relates to injection mold technical field especially is a kind of injection molding part stripper, including support pedestal, the top fixed connection of support pedestal has fixed mould component, the other side fixed connection of support pedestal top has lifting assembly, and the top of lifting assembly is connected in the one side of fixed mould component top, the top of fixed mould component is slidably connected with movable mould component.This device passes through the adoption of arc insert guide slot cooperation arc slider structure, makes arc core rod along product arc do circumferential motion core-pulling, completely sticks to product inner wall separation, thoroughly avoids core-pulling and deformation, lifting assembly is linked by slope groove and traction rod, realizes the synchronous operation of opening mould action and arc core-pulling action, need not additional waiting core-pulling time, sets up inside and outside double loop cooling water channel, respectively to the precision cooling of the outside of cavity and L block part, cooperate with red copper heat conduction block and strengthen heat exchange, make product cooling uniform.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and specifically to a demolding device for injection molded parts. Background Technology

[0002] Elbow-type arc-shaped injection molded parts are widely used in water supply and drainage, HVAC, automotive piping and other fields. The difficulty in molding them lies in the core pulling and demolding of the arc-shaped inner hole.

[0003] Chinese utility model patent with announcement number CN220280392U discloses a demolding device for injection molded parts, including "a frame, wherein the frame is provided with a mold having a cavity, wherein there are at least two cavities, and the cavity penetrates through the mold"; the existing demolding device's arc-shaped inner hole core-pulling trajectory does not match the curvature of the product, which can easily cause the inner wall of the product to be scratched, deformed, or even broken. Utility Model Content

[0004] The purpose of this invention is to provide a demolding device for injection molded parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a demolding device for injection molded parts, comprising a support base, a fixed mold assembly fixedly connected to the top of the support base, a lifting assembly fixedly connected to the other side of the top of the support base, and the top of the lifting assembly being connected through to one side of the top of the fixed mold assembly, a moving mold assembly being slidably connected to the top of the fixed mold assembly, a demolding and extraction assembly being slidably connected to one side inside the fixed mold assembly, and a core-pulling assembly being slidably connected to one side of the lifting assembly extending to the top of the fixed mold assembly;

[0006] The moving mold assembly includes three guide sleeves, the inner walls of which are fitted onto the top of the fixed mold assembly. Moving modules are fixedly connected to the side surfaces of the three guide sleeves, and a docking block is fixedly connected to the other side of the bottom of the moving modules.

[0007] The beneficial effects of this utility model are as follows: by adopting an arc-shaped insert guide groove in conjunction with an arc-shaped slider structure, the arc core rod moves in a circular motion along the product's arc to pull the core, completely fitting and separating from the inner wall of the product, thus completely avoiding core pulling damage and deformation. The lifting component is linked with the traction rod through the inclined groove, so that the mold opening action and the arc-shaped core pulling action are carried out simultaneously, without the need for additional waiting time for core pulling. A dual-circuit cooling water channel is set up to precisely cool the outer side of the cavity and the L-block area respectively. Combined with the copper heat-conducting block to enhance heat exchange, the product is cooled evenly.

[0008] To achieve high-precision guidance and mold positioning:

[0009] Further configured as follows: the fixed mold assembly includes a fixed module, the bottom of the fixed module is fixedly connected to the top of the support base, an L-block is fixedly connected to one side of the top of the fixed module, guide rods are fixedly connected to the three corners of the L-block, and the three guide rods are slidably connected to the inside of the three guide sleeves, an arc-shaped insert is fixedly connected to the middle of the top of the fixed module, and the inside of the arc-shaped insert is set as an arc-shaped guide groove structure, and a straight slide is threadedly connected to the other side of the top of the fixed module;

[0010] Both sides of the arc-shaped insert's arc-shaped guide groove are threaded with side pressure blocks, and the end of the side pressure block facing the arc-shaped guide groove is set as a spring rod structure. One end of the straight slide is facing one end of the arc-shaped insert's arc-shaped guide groove, and one side of the straight slide is located at the angle formed by the L-block and the arc-shaped insert.

[0011] The fixed module has two water inlet pipes that run through it. Each of the two water inlet pipes is fixedly connected to a double pipe on one side of its interior. The two water inlet pipes are also fixedly connected to an external water pipe and an internal water outlet pipe. The internal water outlet pipe has a partition plate structure inside. A heat-conducting block is fixedly connected to the top of the end of the internal water outlet pipe near the inner wall of the fixed module. The top of the heat-conducting block runs through the interior of the L-block.

[0012] By adopting the above technical solution, the compression spring provides continuous lateral pressure, ensuring that the arc slider always moves in close contact with the arc guide groove, eliminating movement gaps. When the core is pulled into place, the spring force acts as a buffer, preventing hard impact from damaging the mold. The external cooling water channel surrounds the outside of the cavity, carrying away most of the heat. The internal cooling water channel enhances the heat exchange in the L-shaped part through the heat-conducting block, solving the problem of slow cooling in the corners.

[0013] To achieve simultaneous mold opening and core pulling:

[0014] Further configured as follows: the lifting assembly includes a lifting cylinder, the bottom of which is fixedly connected to one end of the top of the support base; a support plate is fixedly connected to the top of the lifting cylinder shaft; the side surface of the lifting cylinder shaft is connected through the interior of the fixed module; a sloping groove is fixedly connected to the top of the support plate; a traction rod is slidably connected inside the sloping groove of the support plate; and the top of the traction rod is inserted into the bottom of the core-pulling assembly.

[0015] By adopting the above technical solution, when the lifting cylinder drives the pallet to rise and fall, the inclined groove drives the traction rod to move horizontally, thereby driving the core-pulling assembly to move along the arc trajectory, realizing the synchronous linkage of mold opening and core pulling. The structure is simple and reliable, and no additional core-pulling power source is required.

[0016] To achieve coordinated operation of straight core pulling and curved core pulling:

[0017] Further configured as follows: both the demolding and core-pulling components include telescopic cylinders, one end of each telescopic cylinder shaft is fixedly connected to a push rod, the other end of the push rod of the demolding component is fixedly connected to a straight slider, and the other end of the straight slider is fixedly connected to a pull rod, the other end of the push rod of the core-pulling component is sleeved with a rotating seat, the bottom of the rotating seat is fixedly connected to an arc slider, the other end of the arc slider is fixedly connected to an arc core rod, and the bottoms of the straight slider and the arc slider are slidably connected inside the straight slide and the inclined groove, respectively.

[0018] By adopting the above technical solution, the core pulling of the straight hole part of the product is completed by the demolding and extraction component, and the core pulling component is completed by the arc-shaped inner hole. The two work together to achieve complete demolding of complex inner hole products. The rotating seat structure can automatically compensate for the angle change of the arc slider during movement and avoid motion interference.

[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0020] Figure 1 This is a top view of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall unfolded structure of this utility model;

[0022] Figure 3 This is a top view of the fixed mold assembly of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the fixed module of this utility model;

[0024] Figure 5 This is a schematic diagram of the lifting component structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the demolding and core-pulling components of this utility model.

[0026] In the diagram: 1. Support base; 2. Fixed mold assembly; 201. Fixed module; 202. L-block; 203. Guide post; 204. Arc-shaped insert; 205. Side pressure block; 206. Straight slide; 207. Water inlet pipe; 208. Double pipe; 209. Outlet water pipe; 2010. Inlet water pipe; 2011. Heat-conducting block; 3. Lifting assembly; 301. Lifting cylinder; 302. Support plate; 303. Traction rod; 304. Angled groove; 4. Moving mold assembly; 401. Guide sleeve; 402. Moving module; 403. Connecting block; 5. Demolding and extraction assembly; 501. Telescopic cylinder; 502. Push rod; 503. Straight slider; 504. Pull rod; 6. Core pulling assembly; 601. Rotary seat; 602. Arc slider; 603. Arc core rod. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0028] Please see Figures 1 to 6 A demolding device for injection molded parts includes a support base 1, a fixed mold assembly 2 fixedly connected to the top of the support base 1, a lifting assembly 3 fixedly connected to the other side of the top of the support base 1, and the top of the lifting assembly 3 being connected through to one side of the top of the fixed mold assembly 2. A moving mold assembly 4 is slidably connected to the top of the fixed mold assembly 2, a demolding extraction assembly 5 is slidably connected to one side inside the fixed mold assembly 2, and a core-pulling assembly 6 is slidably connected to one side of the top of the fixed mold assembly 2 where the lifting assembly 3 extends.

[0029] The moving mold assembly 4 includes three guide sleeves 401. The inner wall of the guide sleeves 401 is fitted onto the top of the fixed mold assembly 2. The moving module 402 is fixedly connected to the side surface of the three guide sleeves 401. The docking block 403 is fixedly connected to the other side of the bottom of the moving module 402.

[0030] In this embodiment, as Figure 3 As shown, the fixed mold assembly 2 includes a fixed module 201. The bottom of the fixed module 201 is fixedly connected to the top of the support base 1. An L-block 202 is fixedly connected to one side of the top of the fixed module 201. Guide rods 203 are fixedly connected to the three corners of the L-block 202, and the three guide rods 203 are slidably connected to the inside of the three guide sleeves 401 respectively. An arc-shaped insert 204 is fixedly connected to the middle of the top of the fixed module 201, and the inside of the arc-shaped insert 204 is set as an arc-shaped guide groove structure. A straight slide rail 206 is threadedly connected to the other side of the top of the fixed module 201.

[0031] In this embodiment, as Figure 3 As shown, both sides of the arc-shaped insert 204's arc-shaped guide groove are threaded with side pressure blocks 205, and the end of the side pressure block 205 facing the arc-shaped guide groove is set as a spring rod structure. One end of the straight slide 206 faces one end of the arc-shaped insert 204's arc-shaped guide groove, and one side of the straight slide 206 is located at the angle formed by the L-block 202 and the arc-shaped insert 204.

[0032] In this embodiment, as Figure 4As shown, the interior of the fixed module 201 is connected by two water inlet pipes 207, and the two water inlet pipes 207 are respectively fixedly connected to a double pipe 208 on one side of the interior. The two water inlet pipes 207 are respectively fixedly connected to an outlet water pipe 209 and an inner outlet water pipe 2010. At the same time, the interior of the inner outlet water pipe 2010 is provided with a partition plate structure. The top of the inner outlet water pipe 2010 near the inner wall of the fixed module 201 is fixedly connected to a heat-conducting block 2011, and the top of the heat-conducting block 2011 is connected through the interior of the L block 202.

[0033] In this embodiment, as Figure 5 As shown, the lifting assembly 3 includes a lifting cylinder 301. The bottom of the lifting cylinder 301 is fixedly connected to one end of the top of the support base 1. A support plate 302 is fixedly connected to the top of the shaft of the lifting cylinder 301. The side surface of the shaft of the lifting cylinder 301 is connected through the interior of the fixed module 201. A sloped groove 304 is fixedly connected to the top of the support plate 302. A traction rod 303 is slidably connected inside the sloped groove 304 of the support plate 302. The top of the traction rod 303 is inserted into the bottom of the core-pulling assembly 6.

[0034] In this embodiment, as Figure 6 As shown, both the demolding and extraction assembly 5 and the core-pulling assembly 6 include telescopic cylinders 501. One end of the shaft of each telescopic cylinder 501 is fixedly connected to a push rod 502. The other end of the push rod 502 of the demolding and extraction assembly 5 is fixedly connected to a straight slider 503, and the other end of the straight slider 503 is fixedly connected to a pull rod 504. The other end of the push rod 502 of the core-pulling assembly 6 is sleeved with a rotating seat 601. The bottom of the rotating seat 601 is fixedly connected to an arc slider 602. The other end of the arc slider 602 is fixedly connected to an arc core rod 603. The bottoms of the straight slider 503 and the arc slider 602 are slidably connected inside the straight slide 206 and the inclined groove 304, respectively.

[0035] The working process of this injection molded part demolding device is as follows:

[0036] The injection molding machine drives the drive module 402 to move downward along the guide rod 203. The guide rod 203 is inserted into the guide sleeve 401 to achieve precise positioning. After the mold is closed, the inclined groove 304 drives the traction rod 303 to push the arc slider 602 to move along the arc guide groove to the molding position. The pressure head of the side pressure block 205 presses the side of the arc slider 602 under the action of the compression spring. The telescopic cylinder 501 of the demolding and extraction component 5 pushes the straight slider 503 to drive the pull rod 504 to extend to the molding position. At this time, the arc insert 204, the arc core rod 603, and the pull rod 504 together form a complete elbow cavity. The injection molding machine injects the molten plastic into the cavity and holds the pressure to form the mold.

[0037] The chiller sends cooling water into the double pipe 208 through two inlet pipes 207. The outer loop cooling water flows around the outside of the cavity through the double pipe 208, carrying away most of the heat before flowing out from the outlet pipe 209. The inner loop cooling water flows through the inner outlet pipe 2010, and flows out after the heat exchange at the L block 202 is enhanced by the copper heat-conducting block 2011. The dual-loop independent cooling ensures uniform cooling of all parts of the product.

[0038] After cooling, the injection molding machine drives the drive module 402 to move upward to open the mold. The inclined groove 304 drives the traction rod 303 to pull the arc slider 602 in a circular motion along the arc guide groove, driving the arc core rod 603 to be smoothly pulled out along the arc inner wall of the product. During the core pulling process, the spring rod structure of the side pressure block 205 provides buffer resistance to prevent the arc slider 602 from impacting during high-speed movement. After the arc core rod 603 is completely pulled out, the telescopic cylinder 501 of the demolding and extraction component 5 pulls the straight slider 503 to drive the core pulling... Rod 504 is pulled out in a straight line, completing the core-pulling action of all inner holes of the product. After the core-pulling is completed, the moving module 402 continues to rise to the mold opening position. The ejection mechanism of the injection molding machine pushes the product off the moving module 402, completing the demolding. Then, the lifting cylinder 301 drives the support plate 302 to rise, pushing the arc slider 602 back to the molding position. The telescopic cylinder 501 of the demolding extraction component 5 pushes the pull rod 504 to extend and reset. The moving module 402 moves downward to close the mold and enter the next injection cycle.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0040] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A demolding device for injection molded parts, characterized in that: The system includes a support base (1), a fixed mold assembly (2) is fixedly connected to the top of the support base (1), a lifting assembly (3) is fixedly connected to the other side of the top of the support base (1), and the top of the lifting assembly (3) is connected through to one side of the top of the fixed mold assembly (2). A moving mold assembly (4) is slidably connected to the top of the fixed mold assembly (2), a demolding and extraction assembly (5) is slidably connected to one side inside the fixed mold assembly (2), and a core-pulling assembly (6) is slidably connected to one side of the lifting assembly (3) extending to the top of the fixed mold assembly (2). The moving mold assembly (4) includes three guide sleeves (401), the inner wall of which is sleeved on the top of the fixed mold assembly (2), and the side surfaces of the three guide sleeves (401) are fixedly connected to a moving module (402). The other side of the bottom of the moving module (402) is fixedly connected to a docking block (403).

2. The injection molded part demolding device as described in claim 1, characterized in that: The fixed mold assembly (2) includes a fixed module (201). The bottom of the fixed module (201) is fixedly connected to the top of the support base (1). An L-block (202) is fixedly connected to one side of the top of the fixed module (201). Guide rods (203) are fixedly connected to the three corners of the L-block (202), and the three guide rods (203) are slidably connected to the inside of the three guide sleeves (401). An arc-shaped insert (204) is fixedly connected to the middle of the top of the fixed module (201), and the inside of the arc-shaped insert (204) is set as an arc-shaped guide groove structure. A straight slide (206) is threadedly connected to the other side of the top of the fixed module (201).

3. The injection molded part demolding device as described in claim 2, characterized in that: Both sides of the arc-shaped insert (204) arc-shaped guide groove are threaded with side pressure blocks (205), and the end of the side pressure block (205) facing the arc-shaped guide groove is set as a spring rod structure. One end of the straight slide (206) faces one end of the arc-shaped guide groove of the arc-shaped insert (204), and one side of the straight slide (206) is located at the included angle formed by the L block (202) and the arc-shaped insert (204).

4. The injection molded part demolding device as described in claim 3, characterized in that: The fixed module (201) has two water inlet pipes (207) that are connected through it. The two water inlet pipes (207) are respectively fixedly connected to a double pipe (208) on one side of the inside. The two water inlet pipes (207) are respectively fixedly connected to an outlet water pipe (209) and an inner outlet water pipe (2010). The inner outlet water pipe (2010) is provided with a partition plate structure inside. The top of the inner outlet water pipe (2010) near the inner wall of the fixed module (201) is fixedly connected to a heat-conducting block (2011). The top of the heat-conducting block (2011) is connected through to the inside of the L block (202).

5. The injection molded part demolding device as described in claim 2, characterized in that: The lifting assembly (3) includes a lifting cylinder (301), the bottom of which is fixedly connected to one end of the top of the support base (1). The top of the shaft of the lifting cylinder (301) is fixedly connected to a support plate (302), and the side surface of the shaft of the lifting cylinder (301) is connected through the interior of the fixed module (201). The top of the support plate (302) is fixedly connected to a sloping groove (304), and the inside of the support plate (302) located in the sloping groove (304) is slidably connected to a traction rod (303), and the top of the traction rod (303) is inserted into the bottom of the core-pulling assembly (6).

6. The injection molded part demolding device as described in claim 5, characterized in that: Both the demolding and extraction assembly (5) and the core-pulling assembly (6) include telescopic cylinders (501). One end of the shaft of each of the two telescopic cylinders (501) is fixedly connected to a push rod (502). The other end of the push rod (502) of the demolding and extraction assembly (5) is fixedly connected to a straight slider (503), and the other end of the straight slider (503) is fixedly connected to a pull rod (504). The other end of the push rod (502) of the core-pulling assembly (6) is sleeved with a rotating seat (601). The bottom of the rotating seat (601) is fixedly connected to an arc slider (602). The other end of the arc slider (602) is fixedly connected to an arc core rod (603). The bottoms of the straight slider (503) and the arc slider (602) are slidably connected inside the straight slide (206) and the inclined groove (304), respectively.

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